I 1111111111111111 11111 lllll lllll 111111111111111 11111 11111 111111111111111111
`
`US009319211B2
`
`(IO) Patent No.:
`US 9,319,211 B2
`
`
`c12) United States Patent
`(45)Date of Patent:
`
`Apr. 19, 2016
`
`Larsson et al.
`
`(54)NODE AND METHOD FOR DOWNLINK
`SCHEDULING AND HYBRID AUTOMATIC
`REPEAT REQUE ST TIMING
`
`(52)U.S. Cl.
`CPC ................ H04L 5114 (2013.01); H04L 111812
`
`
`
`
`(2013.01); H04W 761021 (2013.01)
`
`(58)Field of Classification Search
`(71)Applicant: Telefonaktiebolaget L M Ericsson
`
`
`
`None
`
`(Puhl), Stockholm (SE)
`
`
`
`
`
`
`See application file for complete search history.
`
`(72) Inventors: Daniel Larsson, Vallentuna (SE);
`
`
`
`
`
`Jung-Fu Cheng, Fremont, CA (US)
`
`(56)
`
`
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`(73) Assignee: Telefonaktiebolaget LM Ericsson
`
`
`
`
`
`(publ), Stockholm (SE)
`
`2013/0114472 Al* 5/2013 Tamaki ................. H04L 1/1854
`
`
`370/280
`2013/0301503 Al* 11/2013 Park . H04W 76/048
`
`( *) Notice: Subject to any disclaimer, the term ofthis
`
`
`370/311
`
`
`
`patent is extended or adjusted under 35
`
`4/2015 Gao ...................... H04L 1/1861
`
`2015/0117272 Al*
`
`
`U.S.C. 154(b) by 306 days.
`370/280
`
`
`
`
`
`(21)Appl. No.:
`
`14/239,454
`
`
`
`(22) PCT Filed:Oct.16, 2013
`
`
`
`(86) PCT No.:PCT / SE2013/051209
`
`§371 (c)(l),
`(2)Date:
`Feb.18,2014
`
`OTHER PUBLICATIONS
`
`PCT Notifiation Concerning Transmittal oflnternational Preliminary
`
`
`
`
`
`
`
`Report on Patentability dated Aug. 17, 2015 for corresponding Inter­
`
`
`
`
`national Application No. PCT/SE2013/051209; International Filing
`
`
`Date: Oct. 16, 2013, conssisting of 6-pages.
`(Continued)
`
`
`
`
`
`(87)PCT Pub. No.: WO2015/026275
`
`Primary Examiner - Dang Ton
`
`
`
`
`
`Assistant Examiner - Ronald H Davis
`
`
`(74)Attorney, Agent, or Firm - Christopher & Weisberg,
`P.A.
`Prior Publication Data
`
`
`
`
`
`PCT Pub. Date: Feb. 26, 2015
`
`(65)
`
`
`
`US 2015/0304095 Al Oct. 22, 2015
`
`(57)
`
`ABSTRACT
`
`
`
`
`
`Related U.S. Application Data
`
`
`
`
`
`36 Claims, 17 Drawing Sheets
`
`--10
`
`Dete,mine control t;rning configuration for ,3 secondary cell
`
`
`
`
`
`
`___________ re 18 __
`,-12
`
`
`,xintml t:n1ing c,)nf:guwrion :
`
`
`
`; = 4 for all subframes
`
`control liming configuration deterrnined w.r.t to tab!a 3
`
`� - --·-·--·-- -___ c?��, -·-·-·-
`-·-___________ c?Z
`
`
`-configuration = 2" !f
`
`-configuration = 2" !f
`' - - --·-·-·-- - -·-·-·-·c:-._1_1 __ - -
`
`
`Pcel:::cO_: ,2 or t1
`
`Pceli""-'O, i ,'2 01· fl
`; control timing configuration
`
`=
`-configural;on
`
`-contigurat;on � Nx if
`= 5+ ;f
`
`1 __ 1DD configurnt1on of PG�d:
`
`Pceii-::-3,4 or 5
`
`Pceli""N. where N is 3-5
`2j_ --­
`- - - - - - - - - .,--:
`
`
`control rimlr.g configurntion
`-- _c?8_ -------------
`
`
`determined w.r.t !o \able 4A
`cor.trol riming c:onfigt11atior,
`-Pcell�O, 1,2 or 6,
`
`-·-·-------·-·-·-·-C.;6,
`_
`
`deterrnined w.:.t table 4B
`
`configuration = 2
`, -configLll"akm-:: 1" if
`
`
`- Pcell"'-'3.4 er S:
`
`, - --·-·-- - - --·-·-·-·c-�� - -
`
`i Pcel!=O, ! vr 6
`
`1 configurarion ::: 5
`
`corif1gurativn "-' N'" 1f Pce!l"-t\l,
`
`: - configuration ::; l'>l� ;f
`where N !a 0-6
`; Pcel:�N, wiiere N is 2-5.
`
`
`
`lrr,plement
`
`the rnr,trol timing configvrat.ior:
`
`-32
`
`• - --·-- - - - --·-·-·-- --·-- --·-·-- - - - --·-·-·-- - - --·-·-·-·-- - - - --·-·-·--JC�4-·•
`
`
`
`
`vie RRC signaling control configura!ion Send, to 2 user equimcnt. tr,e lmplemented
`
`
`Some of the example embodiments are directed towards a
`
`
`
`
`
`
`
`
`
`base station for determining a control timing configuration in
`
`
`
`
`order to provide a subframe timing setting for configuring
`
`Provisional application No. 61/869,084, filed on Aug.
`(60)
`
`
`
`
`downlink HARQ-ACK control timing for a cell serving a user
`23, 2013.
`
`
`
`equipment in a multiple cell communications network. The
`
`
`user equipment is served a TDD based cell and a FDD based
`
`
`
`
`cell. Some example embodiments are directed towards the
`
`
`
`
`user equipment the control timing configuration as discussed
`above.
`
`(51)
`Int. Cl.
`H04J3/00
`
`H04J 1100
`
`H04L5/14
`
`(2006.01)
`(2006.01)
`(2006.01)
`(2006.01)
`H04L 1118
`(2009.01)
`H04W76/02
`
`IPR2022-00626
`Apple EX1001 Page 1
`
`

`

`US 9,319,211 B2
`
`Page 2
`
`(56)
`
`References Cited
`
`Ericsson et al: "On support of different TDD UL-DL configurations
`
`
`
`
`
`
`on different bands", 3GPP Draft; Rl-114414, vol. RAN WGl, No.
`OTHER PUBLICATIONS
`
`
`San Fransisco, Nov. 21, 2011, consisting of 6-pages.
`
`
`
`
`3GPP TS 36.213, Vll.1.0 (Dec. 2012), "3rd Generation Partnership
`
`
`
`
`
`International Search Report and Written Opinion dated Apr. 16, 2014
`
`
`
`Project; Technical Specification Group Radio Access Network;
`
`
`
`
`for International Application Serial No. PCT/SE2013/051209, Inter­
`
`
`
`
`Evolved Universal Terrestrial Radio Access (E-UTRA); Physical
`
`
`
`national Filing Date: Oct. 16, 2013 consisting of 10-pages.
`
`
`
`layer procedures (Release 11)", consisting of 155-pages.
`
`
`
`LG Electronics: "CA-based aspects for FDD-TDD joint operation",
`
`
`3GPP Draft; Rl-133372, vol. RAN WGl, No. Barcelona, Spain,
`*cited by examiner
`
`
`Aug. 10, 2013, consisting of3-pages.
`
`IPR2022-00626
`Apple EX1001 Page 2
`
`

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`IPR2022-00626
`Apple EX1001 Page 3
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`IPR2022-00626
`Apple EX1001 Page 4
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`IPR2022-00626
`Apple EX1001 Page 5
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`

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`US 9,319,211
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`2016
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`Apr. 19, 2016
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`Apr. 19, 2016
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`Apr. 19, 2016
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`

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`U.S. Patent Apr. 19,
`2016 Sheet 14 of 17 US 9,319,211
`B2
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`IPR2022-00626
`Apple EX1001 Page 16
`
`

`

`Apr. 19,
`2016
`U.S. Patent
`Sheet 15
`of 17
`
`US 9,319,211
`B2
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`IPR2022-00626
`Apple EX1001 Page 17
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`configuration
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`control
`
`30
`w.r.t table 4B
`configuration
`
`'
`
`timing
`
`-·-·-·-·--·-·-·-· ---·-· ·-
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`
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`configuration
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`configuration
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`where N is 2-5.
`= N-� if
`-configuration
`Pcell=O,
`1 or 6
`= 1 * if
`-configuration
`26
`w.r.t to table 4A
`
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`,' control
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`: i
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`Pcell=O,
`= 2� ifI :
`-configuration
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`
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`-22
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`w.r.t to table 3 I
`·-·�--·�·-··-·~· --�·-·�· -·�·-·-'
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`,--
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`timing
`
`control
`----------------·-·_r::-·18
`
`configuration
`_____ _
`
`timing
`
`configuration
`
`•
`
`timing
`
`I
`
`--
`
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`Determine
`
`cell
`
`for a secondary
`
`,--10
`
`configuration
`
`timing
`
`control
`
`[ = 4 for all subframes
`;
`i control
`. -. ---. -. -. --. -. -. -,::-:-_1
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`-·-·-·-·-·-·
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`---·-·
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`IPR2022-00626
`Apple EX1001 Page 18
`
`

`

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`configuration
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`timing
`
`the control
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`Implement
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`FIGURE 17
`
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`
` '
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`48
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`configuration
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`42
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`1 configuration
`= 5
`-Pcel!=3,4
`or 5;
`configuration
`= 2
`! ; where N is 0-6
`' •
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`1,2 or 6,
`: configuration =
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`i:
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`-·-·-·-·-·
`✓--·-·-·-·
`-·�-�-�·�·�·�·�·-·�,--�58
`w.r.t table 48
`i base station
`configuration
`from
`i configuration
`
`-·-·---·�·-·-·-
`Pcell=N,
`where N is 2-5.
`-configuration
`= N* if
`Pcel!=O,
`1 or 6
`= 1 * if
`-configuration
`�--·-·-·-·-·-·-·
`,--58
`w.r.t to table 4A
`determined
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`control
`·-·- -·--·-______ c.-::.�§_ -·-
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`timing
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`:
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`
`I
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`
`w.r.t to table 3 \
`
`50
`for a secondary
`cell
`
`configuration
`
`timing
`
`control
`
`Determine
`
`40
`
`IPR2022-00626
`Apple EX1001 Page 19
`
`

`

`
`
`US 9,319,211 B2
`
`TECHNICAL FIELD
`
`BACKGROUND
`
`
`
`2
`1
`
`
`NODE AND ME THOD FOR DOWNLINK tion, transport format, hybrid-ARQ information, and control
`
`
`
`
`
`
`information related to spatial multiplexing, if applicable. A
`
`SCHEDULING AND HYBRID AUTOMATIC
`
`
`
`a command downlink scheduling assigmn ent also includes
`
`REPEAT REQUEST TIMING
`
`
`for power control of the PUCCH used for transmission of
`
`
`
`5 hybrid-ARQ acknowledgements in response to downlink
`
`scheduling assigmn ents.
`The DCI further comprises uplink scheduling grants,
`
`
`
`
`
`Some of the example embodiments presented herein are
`
`
`
`
`
`
`including PUSCH resource indication, transport format, and
`directed towards a base station and user equipment, as well as
`
`
`
`
`
`hybrid-ARQ-related information. An uplink scheduling grant
`corresponding methods therein, for determining a control
`
`
`10 also includes a command for power control of the PUSCH.
`timing configuration to provide a subframe timing setting for
`
`
`
`
`
`
`
`
`
`The DCI further comprises power-control commands for a set
`
`
`
`
`configuring downlink HARQ-ACK control timing for a cell
`
`
`
`
`
`of terminals as a complement to the commands included in
`
`
`
`serving the user equipment in a multiple cell communications
`
`the scheduling assigmn ents/grants.
`network.
`
`
`One PDCCH carries one DCI message with one of the
`
`
`15 formats above. As multiple terminals may be scheduled
`
`
`
`simultaneously, on both downlink and uplink, there must be a
`
`Long Term Evolution Systems
`
`
`
`
`possibility to transmit multiple scheduling messages within
`
`
`
`
`
`
`
`Long Term Evolution (LTE) uses Orthogonal Frequency each subframe. Each scheduling message is transmitted on a
`
`
`
`
`
`
`Division Multiplexing (OFDM) in the downlink direction and separate PDCCH, and consequently there are typically mul-
`
`
`
`
`
`
`
`a Discrete Fourier Transform (DFT)-spread OFDM in the 20 tiple and simultaneous PDCCH transmissions within each
`
`
`
`
`
`
`
`
`
`uplink direction. The basic LTE downlink physical resource cell. Furthermore, to support different radio-channel condi­
`
`
`
`
`can thus be seen as a time-frequency grid, where each tions, link adaptation may be used, where the code rate of the
`
`
`
`
`
`
`
`
`resource element corresponds to one OFDM subcarrier dur-PDCCH is selected to match the radio-channel conditions.
`
`
`
`
`To allow for simple yet efficient processing of the control
`
`
`ing one OFDM symbol interval. In the time domain, LTE
`
`
`
`channels in the terminal, the mapping of PDCCHs to resource
`
`
`
`downlink transmissions may be organized into radio frames 25
`
`
`
`
`elements is subject to a certain structure. This structure is
`
`
`
`of 10 ms, with each radio frame consisting of ten equally­
`
`sized subframes oflength Tsubframe=l ms.
`
`
`
`based on Control-Channel Elements (CCEs), which consists
`
`
`
`
`
`Furthermore, the resource allocation in LTE is typically
`
`of nine REGs. The number of CCEs, one, two, four, or eight,
`
`described in terms of resource blocks, where a resource block
`
`
`
`
`
`
`
`required for a certain PDCCH depends on the payload size of
`corresponds to one slot, e.g., 0.5 ms, in the time domain and 30
`
`
`
`
`
`the control information (DCI payload) and the channel-cod­
`12 subcarriers in the frequency domain. A pairof two adjacent
`
`
`
`
`
`
`ing rate. This is used to realize link adaptation for the
`resource blocks in time direction, e.g., 1.0 ms, is known as a
`
`
`
`
`
`
`
`
`
`PDCCH; if the channel conditions for the terminal to which
`
`resource block pair. Resource blocks are numbered in the
`
`
`
`
`
`the PDCCH is intended are disadvantageous, a larger number
`frequency domain, starting with O from one end of the system
`
`
`
`
`
`
`
`
`
`of CCEs is used compared to the case of advantageous chan-
`
`
`35 nel conditions. The number of CCEs used for a PDCCH is
`bandwidth.
`
`
`also referred to as the aggregation level (AL).
`
`
`
`
`The notion of virtual resource blocks (VRB) and physical
`
`
`
`
`The network may then select different aggregation levels
`
`
`resource blocks (PRB) has been introduced in LTE. The
`
`
`
`and PDCCH positions for different user equipments from the
`
`
`
`
`
`actual resource allocation to a user equipment is made in
`
`
`
`available PDCCH resources. For each PDCCH, a CRC is
`
`
`
`terms ofVRB pairs. There are two types of resource alloca­
`
`
`
`
`attached to each DCI message payload. The identity of the
`
`
`
`
`
`tions, localized and distributed. In the localized resource allo-40
`
`
`
`
`terminal ( or terminals) addressed, e.g., the RNTI, is provided
`
`
`cation, a VRB pair is directly mapped to a PRB pair, hence
`
`
`in the CRC calculation and not explicitly transmitted.
`
`
`
`two consecutive and localized VRBs are also placed as con­
`
`
`
`Depending on the purpose of the DCI message, for example,
`
`
`
`
`secutive PRBs in the frequency domain. On the other hand,
`
`
`
`
`unicast data transmission, power-control command, random­
`
`
`
`the distributed VRBs are not mapped to consecutive PRBs in
`
`
`
`
`
`access response, etc., different RNTis are used. For normal
`
`
`
`
`the frequency domain, thereby providing frequency diversity
`45
`
`
`
`unicast data transmission, the terminal-specific C-RNTI is
`
`
`
`for data channel transmitted using these distributed VRBs.
`used.
`
`
`
`
`
`Downlink transmissions are dynamically scheduled, i.e., in
`After CRC attachment, the bits are coded with a rate-1/3
`
`
`
`
`each subframe the base station transmits control information
`
`
`
`tail-biting convolutional code and rate matched to fit the
`
`
`
`regarding which terminals data is transmitted and upon which
`
`
`amount of resources used for PDCCH transmission. After the
`
`
`
`
`resource blocks the data is transmitted, in the current down-50
`
`
`PDCCHs to be transmitted in a given subframe have been
`
`
`
`
`link subframe. This control signaling is typically transmitted
`
`
`
`
`
`allocated to the desired resource elements, the sequence of
`
`
`
`in the first 1, 2, 3 or 4 OFDM symbols in each subframe and
`
`the number n=l, 2, 3 or 4 is known as the Control Format
`
`
`
`bits corresponding to all the PDCCH resource elements to be
`
`
`
`transmitted in the subframe, including the unused resource
`
`
`
`
`Indicator (CFI). The downlink subframe also contains com­
`
`
`
`
`
`elements, is scrambled by a cell and subframe specific scram­
`
`
`mon reference symbols, which are known to the receiver and
`55
`
`
`
`
`bling sequence to randomize inter-cell interference. Such
`
`
`
`used for coherent demodulation of, e.g., the control informa-
`
`
`
`
`scrambling is followed by QPSK modulation and mapping to
`tion.
`
`
`
`
`
`From LTE Release 11 and onwards,
`
`
`
`resource the above described elements. The entire collection of the REGs, includ­
`
`also be scheduled resource assigmn ents may
`ing those unused by any PDCCH, is then interleaved on the enhanced across
`
`
`
`
`
`
`
`
`
`
`
`Physical Downlink Control Channel (EPDCCH). For 3GPP 60 entire control region to randomize inter-cell interference as
`
`
`
`
`
`
`
`
`
`
`
`
`Release 8 to 3GPP Release 10, only Physical Downlink Con­well as capturing frequency diversity for the PDCCHs.
`
`trol Channel (PDCCH) is available.
`PUCCH
`If the mobile terminal has not been assigned an uplink
`
`
`PDCCH
`
`
`
`
`
`
`
`The PDCCH is used to carry downlink control information resource for data transmission, the Ll/L2 control informa-
`
`
`
`
`
`
`
`(DCI)such as scheduling decisions and power-control com­65 tion, e.g., channel-status reports, hybrid-ARQ acknowledg­
`
`
`
`
`
`mands. More specifically, the DCI comprises downlinkments, and scheduling requests, is transmitted in uplink
`
`
`
`
`
`
`
`
`assigned for specifically blocks, resources, e.g., resource PDSCH resource indica-scheduling assigmn ents, including
`
`IPR2022-00626
`Apple EX1001 Page 20
`
`

`

`
`
`US 9,319,211 B2
`
`4
`3
`
`more. All but one CC, the DL Primary CC (DL PCC), may be
`
`
`
`uplink Ll/L2 control on 3GPP Release 8 PUCCH. These
`
`
`
`
`de-activated. Activation provides therefore the possibility to
`
`
`
`
`resources are located at the edges of the total available cell
`
`
`them on a need basis. configu re multiple CC but only activate
`
`bandwidth. Each such resource consists of 12 "subcarriers",
`
`
`
`
`Most of the time a terminal would have one or very few CCs
`e.g., one resource block, within each of the two slots of an
`
`
`
`
`
`
`
`
`
`activated resulting in a lower reception bandwidth and thus
`uplink subframe. In order to provide frequency diversity,
`
`
`
`
`
`5
`battery consumption.
`these frequency resources are frequency hopping on the slot
`
`
`
`
`
`
`
`Scheduling of a CC is done on the PDCCH via downlink
`consists of 12 subcarriers at the boundary , i.e., one "resource"
`
`
`
`
`
`
`assignments. Control information on the PDCCH is format­
`upper part of the spectrum within the first slot of a subframe
`
`
`
`
`ted as a Downlink Control Information (DCI) message. In
`
`and an equally sized resource at the lower part of the spectrum
`
`
`
`
`
`Release 8 a terminal only operates with one DL and one UL
`during the second slot of the subframe or vice versa. If more 10
`
`
`
`
`
`
`
`CC, the association between DL assignment, UL grants and
`resources are needed for the uplink Ll/L2 control sign aling,
`
`
`
`
`
`
`the corresponding DL and UL CCs is therefore clear. In LTE
`
`bandwidthtransmission e.g., in case of very large overall
`
`
`
`
`Release 10 two modes of CA needs to be distinThe gu ished.
`
`
`supporting a large number of users, additional resources
`
`
`
`
`
`
`
`Release of multiple to the operation first case is very similar
`
`blocks can be assigned next to the previously assigned
`
`
`
`
`
`15 8 terminals, a DL assignment or UL grant contained in a DCI
`
`resource blocks.
`
`
`message transmitted on a CC is either valid for the DL CC
`Carrier Aggregation
`
`itself or for associated ( either via cell-specific or UE specific
`The LTE Release 10 standard has recently been standard­
`
`
`
`
`
`
`
`linking) UL CC. A second mode of operation augments a DCI
`ized, supporting bandwidths larger than 20 MHz. One impor­
`
`
`
`
`
`message with the Carrier Indicator Field (CIF). A DCI con­
`tant requirement on LTE Release 10 is to assure backward
`
`
`
`
`
`valid for that DL CC taining a DL assignm ent with CIF is
`
`
`compatibility with LTE Release 8. This should also include
`20
`
`
`indicted with CIF and a DCI containing an UL grant with CIF
`
`
`spectrum compatibility. That would imply that an LTE
`
`is valid for the indicated UL CC.
`
`
`
`Release 10 carrier, wider than 20 MHz, should appear as a
`DCI messages for downlink assignments contain among
`
`
`
`
`
`
`
`number of LTE carriers to an LTE Release 8 terminal. Each
`
`
`
`and coding others resource block assignm ent, modulation
`
`
`
`
`such carrier may be referred to as a Component Carrier (CC).
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`25 scheme related parameters, HARQ redundancy version, etc.
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`In particular for early LTE Release 10 deployments it may be
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`In addition to those parameters that relate to the actual down­
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`expected that there will be a smaller number ofLTE Release
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`link transmission most DCI formats for downlink assign­
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`10 capable terminals compared to many LTE legacy termi­
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`ments also contain a bit field for Transmit Power Control
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`use of a nals. Therefore, it is necessa an efficient ry to assure
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`( TPC) commands. These TPC commands are used to control
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`wide carrier also for legacy terminals, i.e., that it is possible to
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`30 the uplink power control behavior of the corresponding
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`implement carriers where legacy terminals may be scheduled
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`PUCCH that is used to transmit the HARQ feedback.
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`in all parts of the wideband LTE Release 10 carrier. The
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`In LTE Release 10, the transmission of PUCCH is mapped
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`straightforward way to obtain this would be by means of
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`onto one specific uplink CC, the UL Primary CC (UL PCC).
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`Carrier Aggregation (CA). CA implies that an LTE Release
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`Terminals only configured with a single DL CC, which is then
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`10 terminal may receive multiple CC, where the CC have, or
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`35 the DL PCC, and UL CC, which is then the UL PCC, are
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`at least the possibility to have, the same structure as a Release
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`operating dynamic ACK/NACK on PUCCH according to
`8 carrier.
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`3GPP Release 8. The first Control Channel Element (CCE)
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`The number of aggregated CC as well as the bandwidth of
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`used to transmit PDCCH for the DL assignm ent determines
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`the individual CC may be different for uplink and downlink.
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`the dynamic ACK/NACK resource on 3GPP Release 8
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`A symmetric configuration refers to the case where the num­
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`40 PUCCH. Since only one DL CC is cell-specifically linked
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`ber of CCs in downlink and uplink is the same whereas an
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`with the UL PCC no PUCCH collisions may occur since all
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`asymmetric configuration refers to the case that the number of
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`PDCCH are transmitted using different first CCE.
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`CCs is different. It is important to note that the number of CCs
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`Upon reception ofDL assignments on a single Secondary
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`configured in a cell may be different from the number of CCs
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`CC (SCC) or reception of multiple DL assignments, a
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`seen by a terminal: A terminal may for example support more
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`45 PUCCH format (which is referred to as CA PUCCH herein)
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`downlink CCs than uplink CCs, even though the cell is con­
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`serving cells that can carry the HARQ-ACK of multiple
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`figured with the same number of uplink and downlink CCs.
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`should be used. A DL SCC assignment alone is untypical. The
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`During initial access a LTE Release 10 terminal behaves
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`eNB scheduler should strive to schedule a single DL CC
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`similar to a LTE Release 8 terminal. Upon successful connec­
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`SC Cs if not assignment on the D L PCC and try to de-activate
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`tion to the network a terminal may, depending on its own
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`50 needed. A possible scenario that may occur is that eNB sched­
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`capabilities and the network, be configu red with additional
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`ules terminal on multiple DL CCs including the PCC. If the
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`CCs in the UL and DL. Configuration is based on RRC. Due
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`terminal misses all but the DL PCC assignment it will use
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`slow speed of RRC signal­to the heavy sign aling and rather
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`Release 8 PUCCH instead of CA PUCCH. To detect this error
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`ing, it is envisioned that a terminal may be configu red with
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`case eNB has to monitor both the Release 8 PUCCH and the
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`multiple CCs even though not all of them are currently used.
`55 CAPUCCH.
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`If a terminal is configured on multiple CCs this would imply
`In LTE Release 10, the CA PUCCH format is based on the
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`it has to monitor all DL CCs for PDCCH and PDSCH. This
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`of CC is based on number of configu red CC. Configuration
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`implies a wider receiver bandwidth, higher sampling rates,
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`of the reception/application RRC sign aling. After successful
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`etc., resulting in high power consumption.
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`To mitigate Release
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`new configuration the above problems, LTE 10 supports a confirmation message is sent back mak-
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`activation of CCs on top of configu ration.
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`60 ing RRC The terminal moni­ signaling very safe.
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`tors only configured and activated CCs for PDCCH and CA PUCCH Transmission Scheme
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`PDSCH. Since activation is based on Medium Access Control In this application, CA PUCCH refers to means of trans­
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`(MAC) control elements, which are faster than RRC signal­mitting HARQ-ACK of multiple serving cells in the UL. For
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`ing, activation/de-activation may follow the number of CCs Rel-10 LTE, CA PUCCH can be embodied in one of the
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`that are required to fulfill the current data rate needs. Upon 65 following two approaches. The first method is based on the
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`arrival oflarge data amounts multiple CCs are activated, used use of PUCCH format 3 that is based on DFTS-OFDM. The
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`multiple for data transmission, and de-activated if not needed any- ACK/NACK bits are encoded to form 48 coded bits.
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`IPR2022-00626
`Apple EX1001 Page 21
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`US 9,319,211 B2
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`Downlink association set index K � {kr,, k1, ... , k,, 1} for TDD
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`6
`5
`The coded bits are then scrambled with cell-specific (and frame 6, which are split into three parts: a downlink part
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`possibly DFTS-OFDM symbol dependent) sequences. 24 (DwPTS), a
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`gu ard period (GP), and an uplink part (UpPTS).
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`bits are transmitted within the first slot and the other 24 bits The remaining subframes are either allocated to uplink or
`downlink transmission.
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`are transmitted within the second slot. The 24 bits per slot are
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`TDD allows for different asymmetries in terms of the
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`converted into 12 QPSK symbols, DFT precoded, spread 5
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`amount of resources allocated for uplink and downlink trans­
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`across five DFTS-OFDM symbols and transmitted within one
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`mission, respectively, by means of different downlink/uplink
`resource blocks (bandwidth) and five DFTS-OFDM symbols
`
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`configu rations. In LTE, there are seven different configura­
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`(time). The spreading sequence is user equipment specific
`
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`
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`tions as shown in FIG. 3. It should be appreciated that a DL
`and enables multiplexing of up to five users within the same
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`resource blocks. For the reference sign als cyclic shifted
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`10 subframe may mean either DL or the special subframe.
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`CAZAC sequences, e.g., computer optimized sequences, To avoid severe interference between downlink and uplink
`maybe used.
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`t