Exhibit 1001
`
`ZTE Corporation and ZTE (USA) Inc.
`
`

`
`US007941151B2
`
`(12) United States Patent
`Rudolf et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 7,941,151 B2
`May 10, 2011
`
`(54)
`
`METHOD AND SYSTEM FOR PROVIDING
`CHANNEL ASSIGNMENT INFORMATION
`USED TO SUPPORT UPLINK AND
`DOWNLINK CHANNELS
`
`(75)
`
`Inventors:
`
`Marian Rudolf, Montreal (CA);
`Stephen G. Dick, Nesconset, NY (US);
`Phillip J. Pietraski, Huntington Station,
`NY (US)
`
`(73)
`
`Assignee:
`
`InterDigital Technology Corporation,
`Wilmington, DE (US)
`
`(*)
`
`Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`(21)
`
`Appl. No.: 11/709,970
`
`(22)
`
`Filed:
`
`Feb. 23, 2007
`
`(65)
`
`(63)
`
`(60)
`
`(51)
`
`(52)
`
`(56)
`
`Prior Publication Data
`
`US 2007/0173262 A1
`
`Jul. 26, 2007
`
`Related U.S. Application Data
`
`Continuation of application No. 10/902,704, filed on
`Jul. 29, 2004, now Pat. No. 7,200,405.
`
`Provisional application No. 60/523,049, filed on Nov.
`18, 2003.
`
`Int. CI.
`HO4W 72/00
`(2009.01)
`U.S. CI ....................... 4551450; 455/451; 455/452.1
`Field of Classification Search ................... 455/450
`See application file for complete search history.
`
`References Cited
`
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`
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`
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`
`(Continued)
`
`Primary Examiner David Q Nguyen
`(74) Attorney, Agent, or Firm Volpe and Koenig, P.C.
`
`(57)
`
`ABSTRACT
`
`A method and wireless communication system for providing
`channel assignment information used to support an uplink
`(UL) channel and a downlink (DL) channel. The system
`includes at least one Node-B and at least one wireless trans-
`mit/receive unit (WTRU). The WTRU communicates with
`the Node-B via a common control channel, the UL channel
`and the DL channel. The WTRU receives a message from the
`Node-B via the common control channel. The message
`includes an indication of whether the message is intended for
`assigning radio resources to the UL channel or the DL chan-
`nel. The WTRU determines whether the message is intended
`for the WTRU and, if so, the WTRU determines whether the
`message is for assigning radio resources to the UL channel or
`the DL channel. The WTRU takes an appropriate action based
`on whether the message is for assigning radio resources to the
`UL channel or the DL channel.
`
`58 Claims, 2 Drawing Sheets
`
`100
`
`106
`(
`WTRU
`
`102
`
`104
`
`108
`DL )
`
`RNC
`
`NODE-B
`
`CONTROL CHANNEL
`
`UL
`
`(
`110
`
`112
`
`ZTE Corporation and ZTE (USA) Inc.
`Exhibit 1001-00001
`
`

`
`US 7,941,151 B2
`Page 2
`
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`
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`
`DE
`EP
`EP
`EP
`EP
`EP
`GB
`GB
`GB
`JP
`JP
`JP
`JP
`JP
`TW
`TW
`WO
`WO
`WO
`WO
`WO
`WO
`WO
`WO
`WO
`
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`1006670
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`1324500
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`
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`
`OTHER PUBLICATIONS
`
`3GPP TSG RAN WG Tdoc R1-02-0018, Nokia, "Compact Signal-
`
`ling of Multi-code Allocation for HSDPA, version 2," Espoo, Fin-
`land, Jan. 2002.
`3GPP TSG RAN WG 1 Tdoc R1-02-1277, Noika, "Two Threshold
`Node B Packet Scheduling," Shanghai, China, Nov. 2002.
`3GPP TSG RAN WG 1 Tdoc R1-02-1350, Motorola, "Design Con-
`siderations for Enhanced Uplink Dedicated Channel," Shanghai,
`China, Nov. 2002.
`3GPP TSG RAN WG 1 Tdoc R1-02-1277, Nokia, "Two Threshold
`Node B Packet Scheduling," Shanghai, China, Nov. 2002.
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Feasibility Study for Enhanced
`
`Uplink for UTRA FDD (Release 6)," 3GPP TR 25.896 V1.0.2 (Oct.
`2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Feasibility Study for Enhanced
`Uplink for UTRA FDD (Release 6)," 3GPP TR 25.896 V6.0.0 (Mar.
`2004).
`"DL Control Channel Structures for Parameters Sent Simultaneously
`With HS-DSCH TTI." TSG-RAN WG1/WG2 Adhoc on HSDPA,
`Sophia Antipolis, France, (Apr. 5-6, 2001).
`Balachandran et al., "Design of a Medium Access Control Feedback
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`on SelectedAreas in Communications, vol. 18, No. 9, pp. 1719-1730,
`(Sep. 2000).
`Gourgne, "Air Interface of the Future European Fully Digital Trunk
`Radio System", Proceedings of the Vehicular Technology Confer-
`ence, vol. CONF. 43, pp. 714-717 (May 1993).
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`ftp.tsgran/WG1 RL1.
`Interdigital, "Updated Recommendation for UE-specific CRC",
`TDOC R1-01-1066, 3GPP TSG RAN WG 1 AD HOC Meeting On
`HSDPA, (Nov. 2001), available at http://www.3gpp.org/ftp/ts~ran/
`WG1 RL1.
`Motorola, "Control Channel Structure for High Speed DSCH (HS-
`DSCH)," TSGRI#16(00) 1242, R2-12A010021, pp. 1-5 (Apr. 5-6,
`2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; High Speed Downlink Packet Access;
`Overall UTRAN Description (Release 5)," 3GPP TR 25.855 v0.0.3;
`(May 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Feasibility Study for Enhanced
`Uplink for UTRA FDD (Release 6)," 3GPP TR 25.896 V 1.0.1, pp. 16 -
`21 (Oct. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; High Speed Downlink Packet Access;
`Overall UTRAN Description (Release 5)," 3GPP TR 25.855 V5.0.0
`(Sep. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 1999)," 3GPP TS 25.212 V3.5.0 (Dec. 2000).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 1999)," 3GPP TS 25.212 V3.7.0 (Sep. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 4)," 3GPP TS 25.212 V4.2.0 (Sep. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 1999)," 3GPP TS 25.222 V3.6.0 (Mar. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 4)," 3GPP TS 25.222 V4.0.0 (Mar. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 4)," 3GPP TS 25.222 V4.1.0 (Sep. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 1999)," 3GPP TS 25.222 V3.7.0 (Sep. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 1999)," 3GPP TS 25.401 V3.6.0 (Mar. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 1999)," 3GPP TS 25.401 V3.8.0 (Sep. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 4)," 3GPP TS 25.401 V4.0.0 (Mar. 2001).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 4)," 3GPP TS 25.401 V4.2.0 (Sep. 2001).
`
`ZTE Corporation and ZTE (USA) Inc.
`Exhibit 1001-00002
`
`

`
`US 7,941,151 B2
`Page 3
`
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 5)," 3GPP TS 25.401 V5.1.0 (Sep. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; UTRA High Speed Downlink Packet
`Access (HSDPA); Overall Description; Stage 2 (Release 5)," 3GPP
`TS 25.308 V5.0.0 (Sep. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 1999),"
`3GPP TS 25.221 V3.6.0 (Mar. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 1999),"
`3GPP TS 25.221 V3.8.0 (Sep. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 4)," 3GPP
`TS 25.221 V4.0.0 (Mar. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 4)," 3GPP
`TS 25.221 V4.2.0 (Sep. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 1999)," 3GPP TS 25.214 v3.6.0 (Mar. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 1999)," 3GPP TS 25.214 v3.8.0 (Sep. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 4)," 3GPP TS 25.214 v4.0.0 (Mar. 2001).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 4)," 3GPP TS 25.214 v4.2.0 (Sep. 2001).
`Third Generation Partnershp Project, "Technical Specification Group
`Radio Access Network; Multiplexing and channel coding (FDD)
`(Release 4)," 3GPP TS 25.212 V4.0.0 (Dec. 2000).
`3rd Generation Partnership Project; Technical Specification Group
`Radio Access Network; Multiplexing and channel coding (Release
`8); 3GPP TS 36.212 V0.2.1 (Nov. 2006).
`3rd Generation Partnership Project; Technical Specification Group
`Radio Access Network; Physical layer procedures (Release 8); 3GPP
`TS 36.213 V0.2.1 (Oct. 2006).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 1999)," 3GPP TS 25.212 V3.11.0 (Sep. 2002).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 4)," 3GPP TS 25.212 V4.6.0 (Sep. 2002).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 5)," 3GPP TS 25.212 V5.6.0 (Sep. 2003).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 5)," 3GPP TS 25.212 V5.9.0 (Jun. 2004).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(FDD) (Release 6)," 3GPP TS 25.212 V6.2.0 (Jun. 2004).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 1999)," 3GPP TS 25.222 V3.10.0 (Sep. 2002).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 4)," 3GPP TS 25.222 V4.6.0 (Dec. 2002).
`Third Generation Parinership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 4)," 3GPP TS 25.222 V4.7.0 (Dec. 2003).
`
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 5)," 3GPP TS 25.222 V5.5.0 (Jun. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 5)," 3GPP TS 25.212 V5.6.0 (Dec. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Multiplexing and channel coding
`(TDD) (Release 6)," 3GPP TS 25.222 V6.0.0 (Dec. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 1999)," 3GPP TS 25.401 V3.10.0 (Jun. 2002).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 4)," 3GPP TS 25.401 V4.6.0 (Dec. 2002).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 5)," 3GPP TS 25.401 V5.6.0 (Jun. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 5)," 3GPP TS 25.401 V5.8.0 (Jun. 2004).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 6)," 3GPP TS 25.401 V6.1.0 (Jun. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRAN Overall Description
`(Release 6)," 3GPP TS 25.401 V6.3.0 (Jun. 2004).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRA High Speed Downlink Packet
`Access (HSDPA); Overall Description; Stage 2 (Release 5)," 3GPP
`TS 25.308 V5.4.0 (Mm. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRA High Speed Downlink Packet
`Access (HSDPA); Overall Description; Stage 2 (Release 5)," 3GPP
`TS 25.308 V5.5.0 (Mar. 2004).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; UTRA High Speed Downlink Packet
`Access (HSDPA); Overall Description; Stage 2 (Release 6)," 3GPP
`TS 25.308 V6.1.0 (Mar. 2004).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 1999),"
`3GPP TS 25.221 V3.11.0 (Sep. 2002).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 4)," 3GPP
`TS 25.221 V4.7.0 (Dec. 2002).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 5)," 3GPP
`TS 25.221 V5.5.0 (Jun. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical channels and mapping of
`transport channels onto physical channels (TDD) (Release 6)," 3GPP
`TS 25.221 V6.1.0 (Jun. 2004).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 1999)," 3GPP TS 25.214 v3.12.0 (Mar. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 4)," 3GPP TS 25.214 v4.6.0 (Mar. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 5)," 3GPP TS 25.214 v5.6.0 (Sep. 2003).
`Third Generation Partnership Project, "Technical Specification
`Group Radio Access Network; Physical Layer Procedures (FDD)
`(Release 5)." 3GPP TS 25.214 v5.9.0 (Jun. 2004).
`
`* cited by examiner
`
`ZTE Corporation and ZTE (USA) Inc.
`Exhibit 1001-00003
`
`

`
`U.S. Patent
`
`May 10, 2011 Sheet 1 of 2
`
`US 7,941,151 B2
`
`102
`
`104
`
`108
`
`DL
`
`RNC
`
`NODE-B
`
`CONTROLCHANNEL
`
`100
`
`106
`(
`
`WTRU
`
`UL
`
`110
`
`FIG. 1
`
`112
`
`START ~.--202
`
`200
`
`.~- 204
`
`RECEIVE A MESSAGE FROM A NODE-B.
`
`DETERMINE WHETHER THE
`MESSAGE IS INTENDED FOR A
`PARTICULAR WTRU
`
`~ YES
`
`DETERMINE WHETHER THE
`MESSAGE IS FOR RADIO RESOURCE
`ASSIGNMENT FOR DL OR UL
`
`208 ~
`
`~
`~
`
`206
`
`NO
`
`TAKE APPROPRIATE ACTION DEPENDING ON THE
`DETERMINATION OF STEP 208
`
`FIG. 3
`
`ZTE Corporation and ZTE (USA) Inc.
`Exhibit 1001-00004
`
`

`
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`
`CLUSTER CODE INDICATOR (3 BITS)
`
`ZTE Corporation and ZTE (USA) Inc.
`Exhibit 1001-00005
`
`v v v v v v v v
`
`($118 ~) ~IO.LVOIOHI :::1000 ~1315N70
`
`

`
`US 7,941,151 B2
`
`1
`METHOD AND SYSTEM FOR PROVIDING
`CHANNEL ASSIGNMENT INFORMATION
`USED TO SUPPORT UPLINK AND
`DOWNLINK CHANNELS
`
`CROSS REFERENCE TO RELATED
`APPLICATION
`
`This application is a continuation of U.S. patent applica-
`tion Ser. No. 10/902,704, filed Jul. 29, 2004 now U.S. Pat. No. 10
`7,200,405, which claims the benefit of U.S. Provisional
`Application No. 60/523,049 filed on Nov. 18, 2003, which is
`incorporated by reference as if fully set forth.
`
`FIELD OF INVENTION
`
`15
`
`2
`introduced on top of an existing HS-SCCH for an HSDPA.
`Thus, it is possible to introduce a separate set of SF 128 DL
`channels as UL resource assignment channels. With this
`approach, a WTRU would be required to monitor one or more
`UL resource assignment channels in addition to the
`HS-SCCHs for an HSDPA operation. Although this approach
`is conceptually simple, there are many disadvantages with
`this scheme, such as WTRU complexity, WTRU battery effi-
`ciency, and DL spreading code usage.
`Therefore, an efficient EU channel assignment scheme is
`necessary for supporting both an EU and an HSDPA opera-
`tion.
`
`SUMMARY
`
`The present invention is related to a wireless communica-
`tion system. More particularly, the present invention is related
`to a method and system for providing channel assignment
`information to support uplink and downlink transmissions.
`
`BACKGROUND
`
`High speed downlink packet access (HSDPA) has been
`developed to increase downlink (DL) efficiency and through-
`put in universal mobile telecommunication system (UMTS)
`Release 5 (R5) wideband code division multiple access
`(W-CDMA) systems. The key advantages of HSDPA as com-
`pared to UMTS R99/R4 are fast and dynamic link adaptation
`in the DL and a fast layer 1 hybrid automatic repeat request
`(H-ARQ). Fast link adaptation is achieved by fast scheduling
`DL transmissions in a base station, coupled with fast layer 1
`DL signaling channels. The signaling channel, a high speed
`shared control channel (HS-SCCH), conveys radio resource
`allocation information to a plurality of wireless transmit/
`receive units (WTRUs).
`In frequency division duplex (FDD), an HS-SCCH is sent
`by means of a spreading factor (SF) 128 channelization code
`during a three (3) time slot transmission time interval (TTI).
`The HS-SCCH indicates that data would be transmitted to a
`WTRU on a high speed downlink shared channel (HS-
`DSCH) after a particular time offset. The HS-SCCH carries
`the following information: 1) channelization-code-set infor-
`mation (7 bits); 2) modulation scheme information (1 bit); 3)
`transport-block size information (6 bits); 4) H-ARQ process
`information (3 bits); 5) redundancy and constellation version
`(3 bits); 6) new data indicator (1 bit); and 7) a WTRU identity
`(16 bits).
`The HS-SCCH is sent over three (3) time slots (2 ms TTI),
`but consists of two (2) fields. Field 1 (first time slot) contains
`channelization code mapping and modulation format infor-
`mation; and field 2 (second and third time slots) contains
`transport block size, H-ARQ information, redundancy ver-
`sion and a new data indicator along with a WTRU-specific
`cyclic redundancy check (CRC).
`Alternatively, an enhanced uplink (EU) increases uplink
`(UL) efficiency and throughput. H-ARQ and Node-B sched-
`uling is part of the EU. Similar to an HSDPA, a new shared DL
`control channel for EU operation provides fast and dynamic
`allocation of UL radio resources for UL transmissions. The
`shared DL control channel for the EU needs to ensure low
`allocation latencies and efficient radio resources management
`for UL transmissions. Hereinafter, the shared DL control
`channel for the purposes of an EU is simply referred to as a
`UL resource assignment channel.
`In order to implement an EU along with an HSDPA,
`another UL resource assignment channel for the EU could be
`
`In one embodiment, the present invention is a method and
`wireless communication system for providing channel
`assignment information for supporting a UL channel and a
`DL channel. The system includes at least one Node-B and at
`20 least one WTRU. The WTRU communicates with the Node-B
`via a common control channel, the UL channel and the DL
`channel. The WTRU receives a message from the Node-B via
`the conunon control channel. The message includes an indi-
`cation of whether the message is intended for assigning radio
`25 resources to the UL cha~mel or the DL channel. The WTRU
`determines whether the message is intended for the WTRU
`and, if so, the WTRU determines whether the message is for
`assigning radio resources to the UL channel or the DL chan-
`nel. The WTRU takes an appropriate action based on whether
`30 the message is for assigning radio resources to the UL channel
`or the DL channel.
`In another embodiment, the present invention is a method
`and time-slotted wireless communication system. The system
`includes at least one Node-B, a radio network controller
`35 (RNC) which controls the Node-B, and at least one WTRU
`which communicates with the Node-B via a common control
`channel, a UL channel and a DL channel. The RNC transmits
`a message to the WTRU indicating which time slot TTIs
`support UL channel transmissions and which time slot TTIs
`4o support DL channel transmissions.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`A more detailed understanding of the invention may be had
`45 from the following description of a preferred example, given
`by way of example and to be understood in conjunction with
`the accompanying drawing wherein:
`FIG. 1 is a block diagram of a wireless communication
`system operating in accordance with the present invention;
`5o FIG. 2 is a look-up table for channelization code set map-
`ping in an HSDPA, which is utilized in conjunction with the
`system of FIG. 1; and
`FIG. 3 is a flowchart of a process including method steps
`for implementing uplink channel assignment signaling in
`55 accordance with the present invention.
`
`DETAILED DESCRIPTION OF THE PREFERRED
`EMBODIMENTS
`
`6o The present invention will be described with reference to
`the drawing figures wherein like numerals represent like ele-
`ments throughout.
`Hereafter, the terminology "WTRU" includes but is not
`limited to a user equipment, a mobile station, a fixed or
`65 mobile subscriber unit, a pager, or any other type of device
`capable of operating in a wireless environment. When
`referred to hereafter, the terminology "Node-B" includes but
`
`ZTE Corporation and ZTE (USA) Inc.
`Exhibit 1001-00006
`
`

`
`US 7,941,151 B2
`
`3
`is not limited to a base station, a site controller, an access point
`or any other type of interfacing device in a wireless environ-
`ment.
`The present invention is applicable to any type of wireless
`communication systems such as UMTS-time division duplex
`(TDD) and FDD, time division synchronous code division
`multiple access (TDSCDMA), code division multiple access
`2000 (CDMA 2000), and CDMA in general or any other type
`of wireless communication system.
`The features of the present invention may be incorporated
`into an integrated circuit (IC) or be configured in a circuit
`comprising a multitude of interconnecting components.
`The present invention will be described in reference to an
`HSDPA and an EU, and the terms HSDPA and EU are used
`interchangeably with DL and UL, respectively. However, it
`should be understood that the reference to an HSDPA and an
`EU is just for describing the preferred embodiment of the
`present invention, and the teachings of the present invention
`may be applied to any system for utilizing a common control
`channel for transmitting channel assignment information for
`both UL and DL transmissions simultaneously.
`FIG. 1 is a block diagram of a system 100 for supporting
`UL and DL operations in accordance with the present inven-
`tion. The system 100 includes an RNC 102, a Node-B 104,
`and a WTRU 106. The Node-B 104 is controlled by the RNC
`102, and dynamically allocates radio resources for both UL
`and DL transmissions from and to the WTRU 106. Three
`channels are established between the Node-B 104 and the
`WTRU 106. The channels are a DL channel 108, a UL chan-
`nel 110, and a conmlon control chamlel 112. The common
`control channel 112 is utilized for transmission of channel
`assignment information for both UL and DL transmissions.
`The Node-B 104 is configured to support an HSDPA and
`EU operation. Therefore, each Node-B 104 dynamically allo-
`cates radio resources for DL mad UL transmissions to and
`from the WTRU 106 through an HS-DSCH and an EU chan-
`nel, respectively. The radio resources assignment information
`for both the HS-DSCH and the EU is transmitted through the
`common control channel 112.
`In accordance with the present invention, the common
`control channel 112 is utilized for the transmission of radio
`resources assignment information for both UL and DL trans-
`missions and a specific indication is provided to distinguish
`whether the radio resource assignment is for either UL or DL
`transmission. Therefore, the common control channel 112
`occupies a shared DL radio resource space, as defined by a set
`of SF 128 channelization codes, for both DI, and UI, trans-
`missions simultaneously, and the WTRU 106 is configured to
`recognize whether a particular transmission is intended for
`assigning radio resources for the DL or the UL transmissions.
`In accordance with a first embodiment of the present inven-
`tion, an indication that a particular radio resource is assigned
`for a UL transmission is provided by means of one or more of
`the impossible combinations in the channelization code set
`mapping in a current HSDPA. FIG. 2 is a look-up table for
`channelization code set mapping currently used in the
`HSDPA. An HS-SCCH uses seven (7) bits to infom~ the
`WTRU 106 which SF 16 channelization codes are used for
`the corresponding HS-DSCH. Out of the 128 possible com-
`binations, eight (8) combinations are not currently used in an
`HSDPA (see the labeled "redundant area" in FIG. 2). One or
`more of the eight (8) unused combinations is used for assign-
`ing radio resources or indicating that the demodulated trans-
`mission is for UL transmission, not DL transmission. There-
`fore, if the WTRU 106 determines that a channelization-code-
`set corresponds to one of the impossible combinations of FIG.
`2, the WTRU 106 recognizes that the transmission is for
`
`4
`assignment of radio resources for UL transmission, rather
`than DL transmission, or that the codes corresponding to the
`channelization-code-set are assigned to UL transmissions.
`In accordance with a second embodiment of the present
`5 invention, an indication that a particular radio resource is
`assigned for UL transmission is provided by means of a
`WTRU-specific CRC. Under current HSDPA specifications,
`a WTRU-specific CRC is contained in an HS-SCCH field 2. A
`16-bit CRC is computed from the information to be transmit-
`10 ted, and the computed CRC is masked with a unique 16-bit
`WTRU identity (ID). The masked CRC is transmitted to a
`WTRU 106 as a WTRU-specific CRC.
`In accordance with the second embodiment of the present
`invention, this WTRU-specific CRC is modified in a unique
`15 and deterministic way to indicate that the demodulated trans-
`mission is for UL transmission, rather than DL transmission.
`For example, a WTRU-specific CRC computed for an
`HSDPA is inverted for an EU before performing a channel
`coding. A WTRU 106 performs two (2) different compari-
`2o sons, preferably simultaneously, in performing a CRC of the
`received transmission. If the WTRU 106 succeeds in decod-
`ing the received transmission with a WTRU-specific CRC,
`the WTRU 106 recognizes that the transmission is intended
`for an HSDPA, and if the WTRU 106 succeeds in decoding
`25 the received transmission with an inverted WTRU-specific
`CRC, the WTRU 106 recognizes that the transmission is
`intended for an EU.
`In accordance with a third embodiment of the present
`invention, an indication that a particular radio resource is
`30 assigned for an EU is provided by means ofa WTRU-specific
`masking sequence. Under current HSDPA specifications, a
`40-bit sequence of field 1 is masked with a 40-bit WTRU-
`specific intermediate code sequence which is generated from
`a 16-bit WTRU ID.
`In accordance with the third embodiment, the WTRU-
`specific masking on field 1 is modified in a unique and deter-
`ministic way to indicate that a transmission is intended for an
`EU, not for an HSDPA. For example, the inverted 16-bit CRC
`generated in the second embodiment may be used to derive
`4o the 40-bit long masking sequence. If the WTRU 106 succeeds
`in decoding the received transmission with a WTRU-specific
`masking sequence, the WTRU 106 recognizes that the trans-
`mission is intended for an HSDPA, and if the WTRU 106
`succeeds in decoding the received transmission with an
`45 inverted WTRU-specific masking sequence, the WTRU 106
`recognizes that the transmission is intended for an EU.
`With this method, the WTRU 106 can make the distinction
`whether an EU or an HSDPA channel assignment has been
`transmitted after having received only field 1 of the HS-
`5o SCCH transmission.
`Alternatively, WTRU IDs are allocated by the network in
`such a way that a particular WTRU ID does not collide with
`another WTRU ID. For example, a first WTRU’s inverted ID
`for EU may be used to indicate a second WTRU’s HSDPA
`55 service. Therefore, simultaneous detection of presence of a
`UL resource assignment channel and an HS-SCCH is facili-
`tated.
`In accordance with a fourth embodiment of the present
`invention, an indication that a particular radio resource is
`6o assigned for an EU is provided by means of radio resource
`control (RRC) context signaling. Preferably, a Node-B 104
`allocates separate radio resources for transmission of UL
`radio resources assignment and DL radio resources assign-
`ment. Alternatively, an RNC 102 allocates separate radio
`65 resources for transmission of UL radio resources assignment
`and DL radio resources assignment by using RRC signaling
`messages.
`
`35
`
`ZTE Corporation and ZTE (USA) Inc.
`Exhibit 1001-00007
`
`

`
`US 7,941,151 B2
`
`5
`
`15
`
`6
`the WTRU determining whether the downlink control
`information is intended for the WTRU based on WTRU
`identity (ID)-masked cyclic redundanc