1、NR SRS資源配置協議解析和實際應用XX無線網絡優化中心柳書XX年XX月 TOC o 1-5 h z 概述4 HYPERLINK l bookmark40 o Current Document SRS-Config 4 HYPERLINK l bookmark44 o Current Document SRS-ResourceSet 4 HYPERLINK l bookmark53 o Current Document resourceType 5periodic 6semi-persistent 6aperiodic 8 HYPERLINK l bookmark73 o Current D

2、ocument usage 9 HYPERLINK l bookmark76 o Current Document beamManagement 9 HYPERLINK l bookmark81 o Current Document codebook 9 HYPERLINK l bookmark86 o Current Document nonCodebook 9 HYPERLINK l bookmark91 o Current Document antennaSwitching 9 HYPERLINK l bookmark106 o Current Document SRS-Resource

3、 11 HYPERLINK l bookmark118 o Current Document nrofSRS-Ports 12 HYPERLINK l bookmark128 o Current Document transmissionComb 12 HYPERLINK l bookmark143 o Current Document resourceMapping 13 HYPERLINK l bookmark148 o Current Document freqDomainPosition、freqDomainShift、freqHopping 14SRS頻域分布示例（不跳頻）錯誤!未定

4、義書簽。 HYPERLINK l bookmark164 o Current Document groupOrSequenceHopping 16 HYPERLINK l bookmark173 o Current Document resourceType 17 HYPERLINK l bookmark181 o Current Document SRS-SpatialRelationInfo 17配置框架17 HYPERLINK l bookmark196 o Current Document 廠家現網版本實現功能 18 HYPERLINK l bookmark199 o Current

5、Document 7.1現網版本實現功能和可配置參數18 HYPERLINK l bookmark208 o Current Document 7.2現網空口下發參數18SRS-ResourceSet 19SRS-Resource 20 HYPERLINK l bookmark225 o Current Document 實際SRS頻域分布21 HYPERLINK l bookmark241 o Current Document 7.3現網功能或配置存在的疑問 22總結22 HYPERLINK l bookmark250 o Current Document 參考資料22NR SRS資源配置協

6、議解析和實際應用XX【摘要】NR的SRS用途包括beamManagement, codebook, nonCodebook和antennaSwitching, 配置框架是在UE專用上行BWP的SRS Config下配置SRS ResourceSet和SRS Resource， SRS-ResourceSet里資源相關參數主要是resourceType和usage， SRS Resource里的參數 主要是 nrofSRS-Ports、 transmissionComb、 resourceMapping、 freqDomainPosition、 freqDomainShift、freqHoppi

7、ng、groupOrSequenceHopping，對應 38.211 Table 6.4.1.4.3- 1決定了 SRS資源在頻域上的梳狀分布。本文基于3GPP 38系列F40版本協議，梳理SRS資源的相關配置，計算在頻域的實際映 射圖樣，并結合現網設備版本參數和實際信令，說明目前設備已實現功能和不足。【關鍵字】SRS Config、SRS-ResourceSet、SRS-Resource【業務類別】5G一 概述UE 可配置一個或多個 SRS resource set，每個 SRS resource set 有個 KN1 個 SRS resource， K 取決于 UE 能力 SRS_cap

8、ability。SRS-ResourceSet 指示了 SRS 的用途包括 beamManagement, codebook, nonCodebook, antennaSwitching，當用于 BeamManagement 時，同一時刻只有1個SRS resource可以發送，同一 BWP下不同SRS resource set里時 域行為相同的SRS resource可以同時發送。第 24 章分別討論 SRS-Config、SRS-ResourceSet 和 SRS-Resource 三個和 SRS 相關的 IE里主要參數。SRS-Config該IE里的內容比較簡單，就是列出增刪的SRS-R

9、esourceSet和SRS-Resource：SRS-ResourceSet該IE主要有以下一些參數：屬于該 SRS-ResourceSet 的 SRS-ResourceId；resourceType，即非周期 aperiodic、半持續 semi-persistent 和周期 periodic， 以及 關聯的 Trigger、NZP-CSI-RS-Resource；usage， 即 SRS 的 4 個用途 beamManagement, codebook, nonCodebook, antennaSwitching；功控相關，alpha和p0；pathlossReferenceRS，即估計

10、 SRS 路損時關聯的 NZP-CSI-RS 或者 SSB。EUPfi三口工皿云也:：=如sis13PiTmIdl.l5KCE3CE (EIEEQ. .sajiftrofERS-FKWUTMsFEr-SenS I OF SEE-Bsdgt-ceIiI OFTJCMRLj - Gand.CHOICE j.i “g二&=翎MIE皿 !.耳4戲Gdx皿ZKTZZED. ；!.c*l-RSHZi?-CHI-E5-PBfl!iEE0ldSPTTCmZ. r- I v 1O- =! cot.,FfrflIK醇剃I)MjPP T S 3HJS1 V15.4Q 2Q181ZslccC-fTEQ!：IKI3ZE

11、DL (1. .S21DTICQ&L,加4rd 5.: 3p4EiodLeSBS-R*5naTTnTtTLiFP-vl53E,EEIXJESC7E C5IEE (1 _ .niimKroLSPS-Iriire-rStsw s-E) J -OF IIHUEA.x故8玷四-tu守酒匕-J0PT3QHALSd k.11 assnciaTjKKSI-lESJjnEKCEH3B-EI-RS-Uee2eIcE CockI MwiDdiieboot.ih assncia&MKSI-FlEEEQntKCE L.NN皿 E-CoeKl MonDoiiebcok.iLXlB-J-klED皿匚CX點be心Lru m

12、.i i: jx?g |OmCQffiL, 一 既3 E.igDTIEGIBTOE-NI(JPTliOHJ匚， Cood SeTmp jachl-nssFje-eEiEDMHSCHOICE :EirHKr5H-Ini*K.sm-CLS：-IndxK2.P-2SI-2S-ft-=u=e:dETlOHai, 臉3 K.an-PuHrrCcmiiolMziJStairnT&DatESKHWEMTED 1 SEiTRsrciE, wparwKCLnxdDMfiJ(jmCDffiL. Pc id 5 resourceType非周期SRS需要列出以下參數:aperiodicSRS-ResourceTrig

13、ger，對應 DCI 觸發內容NZP-CSI-RS-Resource，上行基于 non-codebook 時關聯該 SRS resource set 的 CSI- RS resourceslotOffset，觸發非周期SRS的DCI和實際SRS Resource Set發送的時隙偏置半持續、周期SRS需要列出以下參數：NZP-CSI-RS-Resource，上行基于 non-codebook 時關聯該 SRS resource set 的 CSI- RS resourceperiodic6.4.1.4.4 描述了對于周期、半持續 SRS，通過 SRS-PeriodicityAndOffset

14、這 個IE里定義的周期和時隙偏置，按以下公式計算SRS發送候選時隙：I I - n rMoiL-f .-.-|十1廣-,1、0.-rnt -y -hr hp.ir-in r：i irr -ri：rirLCID values pLPCCCH，-1-G2ldenti of 已 locical channcl+n33-46 Resprvd ?-gRecommended at rate j-心SF ZP C3I-RS Resource SetAc :i tat io n / n p a c ti vjit io n心pucch spatial relationAc:i vat io n / D c a

15、 cId n 350 SRS Activadon/DeacHvationmsf csi neponng on pucchAc:i vat io n / D c a c ti/st io n 353TCI Stste Indicaticn for LE-specific PDCCHTCI States Activ at io n/Deac t ivat ion for UE specific PDSCH-54叫曰白血QS Tr yyr 51敏已翱感1SWSP C3 -RS / CSI-lf ResoLrcc Sc:Ac ?i vat io n / D s a c ti vat in n)盼Dup

16、lication ActivdJtjn/Dedtlitdtian-57SCel Activation/Deactivation (four octeti5WSCell Actkation.CeaResource BWP ID:即 Resource ID 指示資源所屬的 Serving Cell 和 BWPaperiodic非周期SRS通過DCI 0_1、1_1、2_3的SRS request字段觸發。SRS request字段沒有SUL是2比特，有SUL是3比特:he iKcmd and tJiiid are defined by Table SRS request 2 bits na def

17、ined by Table 7.3.1.1.2-24 for UEs not configured widi SUL n: t-;? cell: 3 bita far UE： configured SUL in the cell ivhrit the first bit is thr non-S JL- indicator as defined in Tabic 7.3 .1.1-1 andThis bic field msv ako iiLdii：ate 注蛤口占，ted CSI-accorcing to Subclause 6.1.: .2 of 6: T5 38.214,描述了這2比特或

18、者3比特的第2、3比特含義，取值01/10/11 分別對應 aperiodicSRS-ResourceTrigger=1/2/3：Tabk 7.3.1J.2-24: SRS 悝ques Value of SRS request fleldPTrigger&d aperiodic SRS resource for DCI format 0_1,1 0, end 2_lconfloiired with higher la/er pammeter srs-TPC-PDCCH-Graup 曙t to typeBTiigggd 叩口3低 SRS r&gource setfsjl for DCI form

19、at 2_3 configured with higher layer paraiiiieter srs FPC-PDC CW-Grawp set to ,lypeA+,-DJNo aperiodic SRS reasurce sei ifiggerediNo aperiodic SRS resource set triggered-1-Di 1SRS 施。life setlE.) con highQ坷也paramiatw a sei tw 1igu蜜,四th sM 院 gSRS-SRS resource scXs) configured with higher lar/er paramete

20、r弓國 to antenna switchingand rasomgType m SfiS-R琵況，已*亂 set 1o aperiDdic For a 1sset cf serving cellj configured by hiijIiFr layis -10，SRS re&ourcG Get(s) con hi gh巳舊渾廿燈4哇拍e Rhs. j .牌*11： 2i四回with De-iadGSRS-SRS rssoLirce setons j configured with higher layer parameter SiRS-SeUse- sq1 to antenna switc

21、hing and r&soummT汩e in 5/?3扇&:口由如 set la aperiodic for a serving cells configured by higher 1 ayers+J-1 1，SRS resource信)config四d 苗jthhighm1 砰印 阿驢棗spenod GSRS-SRS resourceconfigured with higher layerparameter SRS-SefUsis se1 to antenna switching and 宅而 SRS-Rg&itiFGeS創 sei ioR&sourc& K啪w，set to 3.aper

22、iodic fora 3 rd set of seguing cll| configured by higher layers3.2 usagebeamManagement只在 6.2.1 節 UE sounding procedure，簡單提及當用于 BeamManagement 時，同一時刻多個SRS resource set里只有1個SRS resource可以發送，同一BWP下不同SRS resource set里時域行為相同的SRS resource可以同時發送：The SRS 蛆somce set applicabiliry is ccinfi匹ured by the higher

23、 layer aia：Letei ifjdga in 3蹌凝g：忐柘;Wbenthe liLghcr layer paj ancto usage set to fBc.areIylanaE1cg3aCT, only one SRS icsouicr in each of multiple SRS 就忸 can tc transmitlcd at a given time nnstant the SRS rssourres in difleicat SRS icsomce &ets 鋼ith tlie same time dcmaiii bcliaviour in the same BT can

24、 be-trati&iiiirted SLinaltaiicQuablj-codebook6.1.1.1 描述 PUSCH 基于 codebook 傳輸，UE 配置1個 usage= codebook 的 SRSResource Set，最大基于codebook的SRS Resource數量2個，至少要1個：For codebook based wajiwmssi皿 the UE way be configured will a simple SRS踢傾齡疑 wirii usae sei to cod-tbcok and only one SRS resoiucc can te indicat

25、ed based on the SRI ficin within the SRS icsolucc set. The maxiniuiii numb ci of ccnfLsurcd SRS rcMiirce& foTZ-odcbcok based transmission is 2 If aperiodic SRS is configLiicd for a UE= the SRS req west field Lti DCI triggers tht transmiasioii cf aperiodic SRS resources. #3同 a%dgfijned in63 .L，M 隊 TS

26、 3 $ .2j L 耳斗此口 the LX is EanfigLirud with ihe higher layer piiainetci區Q豺急set to codebook, ths UE is configured with at least one SRS resource. The indicated SRI in slot m 輯 associated with the most receni： transmission of SRS re=sowce identified by the SRI. where the SRS resource is prior to the PD

27、CCH carryi皿g the SRI*nonCodebook6.1.1.2 描述 PUSCH 基于 noncodebook 傳輸，UE 只能配置 1 個 usage= noncodebook 的 SRS Resource Set，最大基于 noncodebook 的 SRS Resource 數量4 個，而 且UE計算SRS發送使用的precoder只能基于1個NZP-CSI-RS Resource：期園哉搽.頂 1 衛3“ The UE sliall uac one or nuiltjpk SRS resources for SRS teansn.iis&ioiL wliert； in

28、SRS rcsoiurcc set. flic ma?cimimi number of SRS resources 嗣ikh can be configured to the UE for siinultancou3 transmit sion in the same symbol and the maximum number of SR.S resouirces are UE capabilitieM Only one RS port for each SRS resDoice is ODnngured. Onl- one SRS rBsource set can be conlG.Ered

29、 with higher laver parameter y鴕好 in SRS-R耕買磷就 set to 破忒眼房頃The inaximuin number of SRS resources fat can be C QEifigured for non-codebook based uplink transimseLcn is 4- The indicated SRI m dot n 博 associsted with the mo&t recent traasmission of SRS reo-mce( s) idJetiittfLed by the SEX vdiere the SRS

30、 trmsmi戰gicm 皓 prior to the PDCCH canying the SRI.*-1Far noQ-codcbooi based tiansinis&ic-ii the UE cm calculate tbs prc&.cdcr used for the transmission of SRS based on measiuancut of an as 5OCLate startPosition 和 nrofSymbols定義JSRS占用符號數是1、2或4,時域起始位置startPosition=05,注意是從時隙的最后往前數，例如startPosition=0表示占用時

31、隙里第13個符號丈M h-2.4 r coiiKcutive； OFDM vnibols giveEU bv the field tu心那淅3前s ccritairKd iii tlie hisher layer psrameter瞬波晶故勰!1J0:r the slarting position in tlie time domain by 一 1 一 vh.sie the offiet w 。上”， counts symbols backwards from th? end of the slot 3rd is given by the fieldcotitaiiied iathe hig

32、herh泮par皿以改彩象蜒創槃皿d少沮蘭 幡:-L repetitionFactor定義了重復次數必須小于等于SRS占用符號數：| witliin the slot in wliicJa the K藐* symbol SRS resource is transmitted. The quantity R 2 = 8個PRB的第2級帶寬，每個2級帶寬再分成m源曙=4個PRB的第3級帶寬: jKj,3Csrs: SRS帶寬索引bsrs :帶寬樹的級別mSRS,b :力JBsrs白勺 SRS U彳百N：級別B。庭上的“葉子”個數UK、=mSRS,b-1/mSRS,b哈S = 0：Bsrs，：定義S

33、RS頻域起始位置k$ SRS序列長度嗎立定義如下:懵）、上段）定義如下：矽fk+曜.一.1的一1 and*子=4 andjj e 1001.1003Ac咐）肉。+*r：?if isss-Tlue refermce paint for 口 0 ls subcEsririer 0 in common resource IblDcIc 0.-The frequency daniain shft vaLiie 汽也由 adjusts the SRS alloc at io ti with resp-ect to the common resource block grid and 將 containe

34、d m the highcr-layei- parametM#.棲gQ/法?回5：扳the S& 怎辟& E. The TfammiswE ccunb offset 7C E0._* is ccaitaLned in ths hi；zlier-kiyer psrsmeter 湖i歸瑚*m 出eSRS-CokIE- and .乳 i& a fiequency po&ition iiidexl+J其中HJ即transmissionComb里定義的cyclicShift，九籍臂、定義如下： 。二。SRS SRS跳頻不啟用時，nb定義如下:If. frequency hopping is disabl

35、ed and he frequency pDsiiion index 境 remskis ccffiBtant (unless le-configined) and is defined gp foff all N彖M OFDM symho理 of the SRS reaaiirce. The quantity- ”匚 k given by the higher-layer parameter jYpomQQStnpfi and die t alu此 f 的業 占 and Nb fbi & =氏邸 are given by the selected row of Table 15.4.1.4.

36、3-1 corresfiorLding to the configured lvalue 或(？$.$groupOrSequenceHopping生成SRS的Low-PAPR序列或序列組跳頻，在節描述：The s.enqueues gioup u =卻F) + n羅) mod 30 and tine Eequence number lh clause 5.2.2 depends on thehiEher-Lsrv parameter 宙gpOr脆如明8氏ppiHR in the SSS-CfelE Tlie SRS sequence identiK 斤ls eiven bv ths highe

37、r layer parameter 巽gt岬袈癰in the SS-Ctojigg lE znd 1 0,1, ./M，% ： 1- is the OFDM symbol number wnthm the SRS m&uurm.年鋼？*#0.癖茲壓修H框 equals neithei/. neither group- nor sequence hopping shall be used arid pf = G注砌姣成醐鼬湖敬燃 Biuals 做唳戲卿此 卵up hoppin擋 bu: not sequaice hopping shall be used and - 揪心卜.徊舊+上+ M町，v

38、- 0herihe pseudo-raadoin sequaice據 defined by clause 3.L.I and ehaH be imtialLMd w：th cMl 色帶 arThe lininning nf earh nrlio fi sTnp ifEquals scaucmraHjiBmiii/- sequence hopping but not gioup hopping shall be Liscddiidp“上咯:，=Gi.=舊略遂t -L啰 心暨，0ofherwiw。坦曳 tbe pseudo-i aiidom sequence c(i) is defined by

39、clause 5.2.1 and shall be initilLzed. with.勺戒1 =at the beginning of each radio ii ame.presourceTypeSRS Resource也定義了 resourceType，也分為aperiodic、semi-persistent和 periodic；對于關聯的 SRS Resource set 和 SRS Resource， resourceType 必須一致：The UE is not expectedtobc configured wiriidiffexenttmic domaHi bchaA.LOf f

40、or SRS resourcesmthe same SRS resource 5rt he UE is also not exported to be cnnfigLired with different time domain behsi ior betwren SRS resoLiice and associated SRS resoirrccs srtSRS-SpatialRelationInfo這個IE在SRS-Config里可選，用于配置參考RS（SSB、NZP-CSI-RS或者其他SRS）和SRS的波束關系:六配置框架對比CSI-RSI, SRS的配置框架要簡單得多，就是在UE專用

41、上行BWP的SRS Config下配置 SRS ResourceSet 和 SRS Resource：BWP-UplinkDedicated七.廠家現網版本實現功能7.1現網版本實現功能和可配置參數HW的5G RAN 2.1版本關于SRS信道資源配置描述如下:5.1. D 概檎(!undiT Rrtermt由jnN)，fflE的誠噸住罟敗每瓣倡母中豈對抵革，Baidzidth Part景薈網筮匪壞雷電的拜曲書旺段- PlSOtiSIHK C to JjrttfftceDc? pkn; Ihii* Urtic) ESFPSignRfCfimd Pc*rl & HU CPrerwlinc 煩cix

42、 IniEiori AMBSS的SES_QmEig HP 中鰥uhe.H 亓mHSiftroi-baVlBntflmiSrLtchinp) ?|I|5e* i機柬A I 刮-I 5石莊.用的Ecdatod*F tfSU-IOICu SinL-i Uxar Ihli： LpH-lnpiA JkiJtapL*- C-jfcput ! /IIF-ILIMO .-sl皆井Hi場素寰成君吒，國乎酒弓說更費數M-上行鹿史芷屋用于售UEg笛Hfl：目曝M %罰上疔境iflitlJ筋河墻舌成殮上tr翎iLinn xrriei=i碩C曰jLfijTfrilHCKWIlHIIK)cBosKEIT.司供就伽于湛構誤

43、告Ml?*卡nfEjEF淀苣行下行1，LAmifl.用于ETwi洲:/的握下行弦里IS理用于選拜叫心溜任1岐IK崩讖里-為下行憧藏這抻果伉的引有媵更昌僅簡要介紹7SRS用途、類型、配置樹、復用、跳頻的原理，未提及任何可調整參數。7.2現網空口下發參數以現網NSA架構下RRC重配置消息為例。SRS-ResourceSet一 s caJlng: TDp5(0) 叩 口小rs-Conflgsstup-M RS RS-Confi g- 3 rs-R esou rceSefT o.ftddModLi s1E NRSRS-ResourceSelsrs-ResourceSeild: DiD(D)q 碩*Fl

44、 srs-ResourosIdListLnrs RS-Ree ourcel d: oxD(D)一 - -doo odaaaR resourcelypeL peri Ddic (o) s “ “ 叩 小穴小-usace codebookd) *01*alp ha: g ip h a08(&)_ L pD: -74(-74) *10,000000*B NRSRS-ResourceSel-srs-ResourcaSelld: h*ooai曰 srs-ResourDBldUst-nrs rs-r&s ourceid: okd(d) aaKKa o do,dokmxm-N RSRS-Res ourrel

45、d: 0k1 0 00001Li rasourcelypeLperiodic 一CO； “如usage: anle n naSwitching(3 *11-alpha alpha0&(5) qrpD: 74(-74) *10 DOQ 0 D, 0*-! fi rfi-R ecn 11 rnoTn ArttlM nrtl let定義 2 個 srs-ResourceSetId=0 和 1，srs-ResourceSetId=0 里包括 SRS-ResourceId=0，用途 codebook； srs-ResourceSetId=1 里包括 SRS-ResourceId=0 和 1，用途 ant

46、ennaSwitching，其他 resourceType/ alpha/ p0 取值一樣：參數srs-ResourceSetId=0srs-ResourceSetId=1NR-SRS-ResourceId=0NR-SRS-ResourceId=0 NR-SRS-ResourceId=1resourceTypeperiodicperiodicusagecodebookantennaSwitchingalphaalpha08alpha08p0-74-74SRS-Resource- s rs-Re ourceTomumo du st1R3R3-Re sourcesrs-Resourceld: -

47、QjiQ(Q) *000000-nrorsRS-Rorte: portl(O)一 DO*AAAbF IransmissionCornbdn2:t-cflmborset-n2 OsD(D)一口-iZElicShift-n2: OxD(O) m000*h resource tapping-slartPosrIiQn OD(D) *0,00* nrof&ymtols: n1(O) *DO*一 repetition Factor. nl(D Ab0DAA-freq Domain Positio rr OiO(O) 一 *00.0 000 口一treq Da mam Shift 0D( D) *0 DO

48、.OO 0 DOOt freq Ho ppi ng一 c-SRS: 0i3d(61) *11.1101*&-SRS： QKD(D) Br330DxxAh op: 00(0) group OrS e que n ceHop ping: neither(Q) 00uuAXh resourceTypeR periodlic自 pe riodiidtyAn dOffs-st-pL SI8Q： Di4e(78) -*100111.0-*-seq u ence Id: Q dte(478 J *0111011,110*d NRSRS-Rasourcesrs-Rssourcel注一0X1 (1) aaxxx

49、x00.00D1XXKX-n rofSR3-P oris: port1(0) *DO*3 transmiss ion Camb土 n2一 com bOffset-n2: DkO(O) ctcii cEh in-nz： oxo(o) oodxxkcc HBI resaumeMappingstariPDsilion: *0。1 計一 nrorsymbo is: m(o do-repetitionFaclor: n1(0) 00 frcqDDmainPositiDn: DkO(O) OOODOO.O* rre q口 omainshiit: Oj(o(o) ooDOUOD.oa* h freqHopp

50、ingASRS： IM3頃)一11M1-b-SRS 0 x0(0) 00*tHiap: 0i0|0 g re u pOrSeq u ence Ho p pl ng: nelther(Oj -resourcelype& periDdiDB- peria di cihAndOiTsei-pL s 伽:一CM9173) 0.01001知 qumcelU： 0Klde(473XTmflll1lQllllOr-firslAciiveUpiinkBWPd 皈1 一IZ. Fhi io h-,Q*ar. j n nl al irnryFifl定義 2 個 srs-ResourceId=0 和 1，除了 startPosition、periodicityAndOffset 有差異，其他