(19) United States
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`(12) Patent Application Publication (10) Pub. No.: US 2006/0140154 A1
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`Kwak et al.
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`(43) Pub. Date:
`Jun. 29, 2006
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`US 20060140 1 54A1
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`(54) METHOD AND APPARATUS FOR
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`SIGNALING USER EQUIPMENT STATUS
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`INFORMATION FOR UPLINK DATA
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`TRANSMISSION IN A MOBILE
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`COMMUNICATION SYSTEM
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`(76)
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`Inventors: Yong-Jun Kwak, Yongin-si (KR);
`Youn-Hyoung Heo, Suwon-si (KR);
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`Kook-Heui Lee, Yongin-si (KR);
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`Ju-Ho Lee, Suwon-si (KR);
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`Joon-Young Cho, Suwon-si (KR);
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`Youn-Bum Kim, Seoul (KR); Gert Jan
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`Van Lieshout, Staines (GB)
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`Correspondence Address:
`ROYLANCE, ABRAMS, BERDO &
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`GOODMAN, L.L.P.
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`1300 19TH STREET, N.W.
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`SUITE 600
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`WASHINGTON,, DC 20036 (US)
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`(21) Appl. No.:
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`(22)
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`Filed:
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`11/252,891
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`Oct. 19, 2005
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`(30)
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`Foreign Application Priority Data
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`Oct. 19, 2004
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`(KR) ..................................... .. 83775/2004
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`Nov. 11, 2004
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`(KR) ..................................... .. 92153/2004
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`Publication Classification
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`(51)
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`Int. Cl.
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`H04B 7/216
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`H04L 12/56
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`(2006.01)
`(2006.01)
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`(52) U.S.Cl.
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`......................... ..370/335; 370/412; 370/342
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`(57)
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`ABSTRACT
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`A method and apparatus for increasing the scheduling per-
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`formance of a system supporting an uplink data service and
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`total system stability by effectively UE status information to
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`a Node B in a mobile communication system supporting the
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`uplink data service are provided. UE status information
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`including buifer occupancy information and transmit power
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`status information is transmitted to a Node B periodically or
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`upon generation of an event, irrespective of the presence or
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`absence of uplink data to be transmitted. Since the buifer
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`occupancy information and the transmit power status infor-
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`mation are transmitted to the Node B by MAC-e signaling,
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`physical channel resources are saved and E-DCH perfor-
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`mance is improved.
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`8°‘
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`SChedu(g3g)Grants
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`ACK/NACK
`
`(803)
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`E_DCH
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`(805)
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`TPS
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`305
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`+ TPS + TPS
`+ TPS
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`807
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`810
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`+ TPS
`+ TPS
`+ TPS
`+ TPS
`+ TPS
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`808
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`809
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`

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`Patent Application Publication Jun. 29, 2006 Sheet 1 of 15
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`US 2006/0140154 A1
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`FIG. 1
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`(PRIOR ART)
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`

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`Patent Application Publication Jun. 29, 2006 Sheet 2 of 15
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`US 2006/0140154 A1
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`(PRIOR ART)
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`

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`Patent Application Publication Jun. 29, 2006 Sheet 3 of 15
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`US 2006/0140154 A1
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`114
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`104
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`FIG.3
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`(PRIOR ART)
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`

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`Patent Application Publication Jun. 29, 2006 Sheet 4 of 15
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`US 2006/0140154 A1
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` E—DCH Setup (202) SCHEDULING ASSIGNMENT INFORMATION (208)
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`TF INFORMATION (212)
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`UL Packet data transmission using E-DCH (214)
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`DECIDE TF OF E-DCH 210
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`216
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`AOK/NACK (218)
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`GENEFIATE ACK/NACK
`
`FIG.4
`
`(PRIOR ART)
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`

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`Patent Application Publication Jun. 29, 2006 Sheet 5 of 15
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`US 2006/0140154 A1
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`Patent Application Publication Jun. 29, 2006 Sheet 6 of 15
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`US 2006/0140154 A1
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`Patent Application Publication Jun. 29, 2006 Sheet 7 of 15
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`US 2006/0140154 A1
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`Patent Application Publication Jun. 29, 2006 Sheet 13 of 15
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`US 2006/0140154 A1
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`E-DCH TRANSMISSIO
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`START?
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`NO
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`1 303
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`B0 TRANSMISSION?
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`NO}
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`1 304
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`TPS TRANSMISSION
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`EVENT?
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`3
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`INCLUDE TPS IN MAC-e PDU
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`NO
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`,
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`1307
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`TRANSMIT MAC-e PDU
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`FIG.13
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`Patent Application Publication Jun. 29, 2006 Sheet 14 of 15
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`US 2006/0140154 A1
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`I402
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`YES
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`E—DCH TRANSMISSION
`START?
`’
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`NO
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`1407
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`1403
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`B0 TRANSMISSION?
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`1404
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`TPS PERIOD EXPIRED?
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`TPS TRANSMISSION
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`EVENT?
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`I
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`INCLUDE TPS IN MAC-e PDU
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`TRANSMIT MAC-e PDU
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`E.-DCH DATA?
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`YES
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`FIG.14
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`Patent Application Publication Jun. 29, 2006 Sheet 15 of 15
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`US 2006/0140154 A1
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`18¢
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`Petitioner's Exhibit 1005
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`Petitioner's Exhibit 1005
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`US 2006/0140154 A1
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`Jun. 29, 2006
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`[0009] A Uu interface is defined between a UE and an
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`RNC. The hierarchical protocol architecture of the Uu
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`interface is illustrated in detail in FIG. 2. This interface is
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`divided into a control plane (C-plane) 30 for exchanging
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`control signals between the UE and the RNC and a user
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`plane (U-plane) 32 for transmitting actual data.
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`[0010] Referring to FIG. 2, a Radio Resource Control
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`(RRC) layer 32, a Radio Link Control (RLC) layer 40, a
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`Medium Access Control (MAC) layer 42, and a physical
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`(PHY) layer 44 are defined on the C-plane 30. A Packet Data
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`Control Protocol (PDCP) layer 36, a Broadcast/Multicast
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`Control (BMC) layer 38, the RLC layer 40, the MAC layer
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`42, and the PHY layer 44 are defined on the U-plane 32. The
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`PHY layer 44 resides in each cell and the MAC layer 42
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`through the RRC layer 34 are configured usually in each
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`RNC.
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`[0011] The PHY layer 44 provides an information delivery
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`service by a radio transfer technology, corresponding to
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`Layer 1 (L1) in an Open System Interconnection (OSI)
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`model. The PHY layer 44 is connected to the MAC layer 42
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`via transport charmels. The mapping relationship between
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`the transport channels and physical charmels is determined
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`according to how data is processed in the PHY layer 44.
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`[0012] The MAC layer 42 is connected to the RLC layer
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`40 via logical channels. The MAC layer 42 delivers data
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`received from the RLC layer 40 on the logical channels to
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`the PHY layer 44 on appropriate transport charmels, and
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`delivers data received from the PHY layer 44 on the trans-
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`port charmels to the RLC layer 40 on appropriate logical
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`channels. The MAC layer 42 inserts additional information
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`or interprets inserted data in data received on the logical
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`channels and controls random access. AU-plane-related part
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`is called MAC-data (MAC-d) and a C-plane-related part is
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`called MAC-control (MAC-c) in the MAC layer 42.
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`[0013] The RLC layer 40 controls the establishment and
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`release of the logical channels. The RLC layer 40 operates
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`in one of an Acknowledged Mode (AM), an Unacknowl-
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`edged Mode (UM) and a Transparent Mode (TM) and
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`provides different functionalities in those modes. Typically,
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`the RLC layer 40 segments or concatenates Service Data
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`Units (SDUs) received form an upper layer to an appropriate
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`size and correct errors.
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`[0014] The PDCP layer 36 resides above the RLC layer 40
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`in the U-plane 32. The PDCP layer 36 is responsible for
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`compression and decompression of the header of data car-
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`ried in the form of an IP packet and data delivery with
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`integrity in the case where a serving RNC is changed-due to
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`the UE’s mobility.
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`[0015] The characteristics of the transport channels that
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`connect the PHY layer 44 to the upper layers depend on
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`Transport Format (TF) that defines PHY layer processes
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`including convolutional charmel encoding, interleaving, and
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`service-specific rate matching.
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`[0016] Particularly, the UMTS system uses an Enhanced
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`Uplink Dedicated CHannel (E-DCH) with the aim to further
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`improve packet transmission performance on the uplink
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`from UEs to a Node B. To support more stable high-speed
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`data transmission,
`the E-DCH utilizes Hybrid Automatic
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`Retransmission request (HARQ) and Node B-controlled
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`scheduling.
`
`Petitioner's Exhibit 1005
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`METHOD AND APPARATUS FOR SIGNALING
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`USER EQUIPMENT STATUS INFORMATION FOR
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`UPLINK DATA TRANSMISSION IN A MOBILE
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`COMMUNICATION SYSTEM
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`CROSS-REFERENCE TO RELATED
`
`
`APPLICATION
`
`
`[0001] This application claims benefits under 35 U.S.C. §
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`119 from Korean Patent Applications Serial Nos. 2004-
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`83775 and 2004-92153 filed in the Korean Intellectual
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`Property Office on Oct. 19, 2004 and Nov. 11, 2004,
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`respectively,
`the entire disclosures of which are hereby
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`incorporated by reference.
`
`BACKGROUND OF THE INVENTION
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`
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`1. Field of the Invention
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`[0003] The present invention relates generally to asyn-
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`chronous Wideband Code Division Multiple Access
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`(WCDMA) communications.
`In particular,
`the present
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`invention relates to a method and apparatus for signaling the
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`transmit power status (TPS), that is, uplink channel status of
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`a User Equipment (UE) for use in uplink packet transmis-
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`sion scheduling.
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`[0004]
`2. Description of the Related Art
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`[0005] A 3rd generation mobile communication system
`using WCDMA based on the European Global System for
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`Mobile communications (GSM) system, Universal Mobile
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`Telecommunication Service (UMTS) provides mobile sub-
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`scribers or computer users with a uniform service of trans-
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`mitting packet-based text, digitized voice, and video and
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`multimedia data at or above 2 Mbps irrespective of their
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`locations around the world. With the introduction of the
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`concept of virtual access, the UMTS system allows access to
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`any end point within a network at all times. The virtual
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`access refers to packet-switched access using a packet
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`protocol like Internet Protocol (IP).
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`[0006] FIG. 1 illustrates the configuration of the UMTS
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`Terrestrial Radio Access Network (UTRAN) of a conven-
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`tional UMTS system.
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`[0007] Referring to FIG. 1, a UTRAN 12 includes Radio
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`Network Controllers (RNCs) 16a and 16b and Node Bs 18a
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`to 18d and connects a UE 20 to a Core Network (CN) 10. A
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`plurality of cells may underlie the Node Bs 18a to 18d. Each
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`RNC 1611 or 16b controls its underlying Node Bs and each
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`Node B controls its underlying cells. An RNC, and Node Bs
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`and cells under the control of the RNC collectively form a
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`Radio Network Subsystem (RNS) 1411 or 14b.
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`[0008] The RNCs 16a and 16b each allocate or manage
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`radio resources to the Node Bs 18a to 18d under their control
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`and the Node Bs 18a to 18d function to actually provide the
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`radio resources. The radio resources are configured on a cell
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`basis and the radio resources provided by the Node Bs 18a
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`to 18d refer to radio resources of the cells that they manage.
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`The UE establishes a radio channel using radio resources
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`provided by a particular cell under a particular Node B, for
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`communications. From the UE’s point of view, a distinction
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`between the Node Bs 18a to 18d and their controlled cells
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`is meaningless and the UE 20 deals only with a physical
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`layer configured on a cell basis. Therefore, the terms “Node
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`B” and “cell” are interchangeably used herein.
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`[0002]
`
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`
`
`Petitioner's Exhibit 1005
`
`

`
`
`
`US 2006/0140154 A1
`
`
`
`Jun. 29, 2006
`
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`[0017] FIG. 3 illustrates data transmission on the E-DCH
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`via typical radio links. Reference numeral 100 denotes a
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`Node B supporting the E-DCH 111 to 114 and reference
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`numerals 101 to 104 denote UEs that transmit the E-DCH
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`111 to 114.
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`[0018] Referring to FIG. 3, the Node B 100 evaluates the
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`channel statuses of the UEs 101 to 104 and schedules their
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`uplink data transmissions based on the charmel statues. The
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`scheduling is performed such that a noise rise measurement
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`does not exceed a target noise rise in the Node B 100 in order
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`to increase total system performance. Therefore, the Node B
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`100 allocates a low data rate to a remote UE 104 and a high
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`data rate to a nearby UE 101.
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`[0019] FIG. 4 is a diagram illustrating a typical signal
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`flow for message transmission on the E-DCH.
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`[0020] Referring to FIG. 4, a Node B and a UE establish
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`an E-DCH in step 202. Step 202 involves message trans-
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`mission on dedicated transport channels. The UE transmits
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`its UE status information to the Node B in step 204. The UE
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`status information may contain information about the trans-
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`mit power and power margin of the UE and the amount of
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`buffered data to be transmitted to the Node B.
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`In step 206, the Node B monitors UE status infor-
`[0021]
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`mation from a plurality of UEs to schedule uplink data
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`transmissions for the individual UEs. The Node B decides to
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`approve an uplink packet transmission from the UE and
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`transmits scheduling assignment information to the UE in
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`step 208. The scheduling assignment information includes
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`an allowed data rate and an allowed timing.
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`the UE determines the TF of the
`In step 210,
`[0022]
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`E-DCH based on the scheduling assignment information.
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`The UE then transmits to the Node B TF information, that
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`is, a Transport Format Resource Indicator (TFRI) and uplink
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`packet data on the E-DCH at the same time in steps 212 and
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`214. The Node B determines whether the TFRI and the
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`uplink packet data have errors in step 216. In the presence
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`of errors in either of the TFRI and the uplink packet data, the
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`Node B transmits an ACKnowledgement (ACK) signal to
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`the UE, whereas in the absence of errors in both, the Node
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`B transmits Non-ACKnowledgement (NACK) signal to the
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`UE in step 218.
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`In the former case, the packet data transmission is
`[0023]
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`completed and the UE transmits new packet data to the Node
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`B on the E-DCH. On the other hand, in the latter case, the
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`UE retransmits the same packet data to the Node B on the
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`E-DCH.
`
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`[0024] As described above, the UE needs to transmit its
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`UE status information to the Node B,
`to assist E-DCH
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`scheduling. Particularly, the uplink transmit power informa-
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`tion included in the UE status information is a significant
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`factor in scheduling. Accordingly, a need exists for speci-
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`fying how the uplink transmit power information is to be
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`transmitted for efficient E-DCH transmission.
`
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`
`
`SUMMARY OF THE INVENTION
`
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`
`[0025] An object of the present invention is to address at
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`
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`least the above problems and/or disadvantages. Accordingly,
`
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`an object of the present invention is to provide a method and
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`
`apparatus for transmitting information about
`the uplink
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`transmit power of a UE to a Node B for use in uplink data
`
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`transmission scheduling in the Node B.
`
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`[0026] Another object of the present invention is to pro-
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`vide a method and apparatus for transmitting information
`
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`about the uplink transmit power of a UE to a Node B by
`
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`
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`transport charmel data of an E-DCH.
`
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`
`
`[0027] The above exemplary objects of the present inven-
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`
`tion are achieved by providing an apparatus and method of
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`transmitting UE status information for uplink data transmis-
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`sion in a mobile communication system.
`
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`
`
`[0028] According to one exemplary aspect of the present
`
`
`
`
`
`
`
`invention, in a method of transmitting UE status information
`
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`
`
`for uplink data transmission in a mobile communication
`
`
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`
`
`system, bulfer occupancy (BO) information is generated by
`
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`
`
`monitoring the amount of uplink data to be transmitted and
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`transit power status (TPS)
`information is generated by
`
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`monitoring uplink transmit power status. It is determined
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`whether the BO information is to be transmitted in a current
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`time interval. If the BO information is to be transmitted in
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`the current time interval, it is determined whether the TPS
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`information is to be transmitted in the current time interval
`
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`according to a TPS period. If the TPS information is to be
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`transmitted in the current time interval, a PDU including the
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`BO information and the TPS information is generated and
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`transmitted after coding and modulation.
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`[0029] According to another exemplary aspect of the
`
`
`
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`
`
`
`present invention, in an apparatus for transmitting UE status
`
`
`
`
`
`
`information for uplink data transmission in a mobile com-
`
`
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`
`
`munication system, a buffer bulfers uplink data and gener-
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`ates BO information by monitoring the amount of the uplink
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`data. A TPS information manager generates TPS information
`
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`by monitoring uplink transmit power status. A UE status
`
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`information generator determines whether the BO informa-
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`tion is to be transmitted in a current time interval, determines
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`whether the TPS information is to be transmitted in the
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`current time interval, if the BO information is to be trans-
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`mitted in the current time interval according to a TPS period,
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`and generates UE status information including the BO
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`information and the TPS information if the TPS information
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`is to be transmitted in the current time interval. A PDU
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`generator generates a PDU including the UE status infor-
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`mation and a transmitter transmits the PDU after coding and
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`modulation.
`
`
`[0030] According to a further exemplary aspect of the
`
`
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`
`
`
`present invention, in a method of transmitting UE status
`
`
`
`
`
`
`
`information for uplink data transmission in a mobile com-
`
`
`
`
`
`
`
`munication system, BO information is generated by mom-
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`
`
`toring the amount of uplink data to be transmitted, and TPS
`
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`
`
`information is generated by monitoring uplink transmit
`
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`
`power status. It is determined whether the BO information
`
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`is to be transmitted in a current time interval. If the BO
`
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`information is to be transmitted in the current time interval,
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`it is determined whether a TPS information transmission
`
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`
`event has occurred. If the TPS information transmission
`
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`
`
`event has occurred, a PDU including the BO information
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`
`
`and the TPS information is generated and transmitted after
`
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`coding and modulation.
`
`
`
`[0031] According to still another exemplary aspect of the
`
`
`
`
`
`
`
`present invention, in an apparatus for transmitting UE status
`
`
`
`
`
`
`information for uplink data transmission in a mobile com-
`
`
`
`
`
`
`
`munication system, a buffer buffers uplink data to be trans-
`
`
`
`
`
`
`
`
`Petitioner's Exhibit 1005
`
`Petitioner's Exhibit 1005
`
`

`
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`US 2006/0140154 A1
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`Jun. 29, 2006
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`[0040] FIG. 6 illustrates the configuration of MAC and
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`PHY layers in relation to E-DCH transmission in a UE;
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`[0041] FIG. 7 illustrates the configuration of MAC and
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`PHY layers in relation to E-DCH reception in a Node B;
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`[0042] FIG. 8 illustrates TPS transmission according to an
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`exemplary embodiment of the present invention;
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`[0043] FIG. 9 illustrates TPS transmission according to
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`another exemplary embodiment of the present invention;
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`[0044] FIG. 10 illustrates TPS transmission according to
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`a third exemplary embodiment of the present invention;
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`[0045] FIG. 11 illustrates TPS transmission according to a
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`fourth exemplary embodiment of the present invention;
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`[0046] FIG. 12 illustrates TPS transmission according to
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`a fifth exemplary embodiment of the present invention;
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`[0047] FIG. 13 is a flowchart illustrating TPS transmis-
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`sion from a UE according to the fourth exemplary embodi-
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`ment of the present invention;
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`[0048] FIG. 14 is a flowchart illustrating TPS transmis-
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`sion from a UE according to the fifth exemplary embodi-
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`ment of the present invention; and
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`[0049] FIG. 15 is a block diagram of a UE for TPS
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`transmission according to an exemplary embodiment of the
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`present invention.
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`DETAILED DESCRIPTION OF EXEMPLARY
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`EMBODIMENTS
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`[0050] Exemplary embodiments of the present invention
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`will be described herein below with reference to the accom-
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`panying drawings. In the following description, well-known
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`functions or constructions are not described in detail for
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`conciseness.
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`[0051] An exemplary object of the present invention is to
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`transmit the TPS of a UE to a Node B. The TPS is expressed
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`as the maximum transmit power of the UE or the transmit
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`power of a control channel alone from the UE. Alternatively,
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`TPS is expressed as a maximum data rate available to the UE
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`or a TF. Alternatively, the uplink transmit power information
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`can be the ratio of the maximum transmit power to the
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`transmit power of the control channel, that is, the power
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`margin of the UE. In this context, the TPS represents the
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`uplink channel status of the UE.
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`[0052] The TPS is transmitted to the Node B by MAC
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`information in the exemplary embodiments of the present
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`invention. As implied from its appellation, the MAC layer is
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`responsible for medium access control between the RLC
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`layer and the PHY layer. With the introduction of the
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`E-DCH, the MAC layer configuration illustrated in FIG. 2
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`has been modified so that for the E-DCH functionality, a
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`MAC-e entity is newly defined to work in conjunction with
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`the existing MAC-d entity configured for a Dedicated CHan-
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`nel (DCH). The MAC-e entity exists between the MAC-d
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`entity and the PHY layer. As data is processed in the MAC
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`layer, its format is changed as illustrated in FIG. 5.
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`[0053] Referring to FIG. 5, an RLC PDU 501 is data
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`delivered from the RLC layer to the MAC layer. The MAC
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`layer creates a MAC PDU by adding a MAC header to the
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`RLC PDU 501 and provides the MAC PDU to the PHY
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`layer. In the case of using the E-DCH, the MAC layer is
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`Petitioner's Exhibit 1005
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`mitted and generates BO information by monitoring the
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`amount of the uplink data. A TPS information manager
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`generates TPS information by monitoring uplink transmit
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`power status. A UE status information generator determines
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`whether the BO information is to be transmitted in a current
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`time interval, determines whether a TPS information trans-
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`mission event has occurred, if the BO information is to be
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`transmitted in the current time interval, and generates UE
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`status information including the BO information and the
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`TPS information if the TPS information transmission event
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`has occurred. A PDU generator generates a PDU including
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`the UE status information, and a transmitter transmits the
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`PDU after coding and modulation.
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`[0032] According to yet another exemplary aspect of the
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`present invention, in a method of transmitting UE status
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`information for uplink data transmission in a mobile com-
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`munication system, BO information is generated by moni-
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`toring the amount of uplink data to be transmitted and TPS
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`information is generated by monitoring uplink transmit
`power status. It is determined whether a current time interval
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`is a BO transmission interval in which the BO information
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`is to be transmitted. If the current time interval is the BO
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`transmission interval, a PDU including the BO information
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`and the TPS information is generated and transmitted after
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`coding and modulation.
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`[0033] According to yet further exemplary aspect of the
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`present invention, in an apparatus for transmitting UE status
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`information for uplink data transmission in a mobile com-
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`munication system, a bulfer bulfers uplink data to be trans-
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`mitted and generates BO information by monitoring the
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`amount of the uplink data. A TPS information manager
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`generates TPS information by monitoring uplink transmit
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`power status. A UE status information generator determines
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`whether a current time interval is a BO transmission interval
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`in which the BO information is to be transmitted, and
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`generates UE status information including the BO informa-
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`tion and the TPS information, if the current time interval is
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`the BO transmission interval. A PDU generator generates a
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`PDU including the UE status information, and a transmitter
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`transmits the PDU after coding and modulation.
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`[0034] The above and other objects, features and advan-
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`tages of the present invention will become more apparent
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`from the following detailed description when taken in con-
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`junction with the accompanying drawings in which like
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`reference symbols indicate the same or similar com