MSCBSC 移動(dòng)通信論壇
搜索
登錄注冊(cè)
網(wǎng)絡(luò)優(yōu)化工程師招聘專欄 4G/LTE通信工程師最新職位列表 通信實(shí)習(xí)生/應(yīng)屆生招聘職位

  • 閱讀:5986
  • 回復(fù):3
common H-RNTI 如何產(chǎn)生?
elvis130
初級(jí)會(huì)員



 發(fā)短消息    關(guān)注Ta 

積分 202
帖子 42
威望 2284 個(gè)
禮品券 0 個(gè)
專家指數(shù) -8
注冊(cè) 2009-5-19
專業(yè)方向  交換工程師
回答問(wèn)題數(shù) 0
回答被采納數(shù) 0
回答采納率 0%
 
發(fā)表于 2011-12-09 16:49:12  只看樓主 
請(qǐng)教一下各位高手:
common H-RNTI是如何產(chǎn)生的呢?
根據(jù)3GPP的定義:
The detection of HS-SCCH is based on Common H-RNTI listed in System Information Block type 5 (SIB 5) or System Information Block type 5bis (SIB 5bis). The UE shall select the Common H-RNTI to be used for reception of the RRC CONNECTION SETUP message according to the following rule:
-
the UE shall select a Common H-RNTI from the Common H-RNTIs listed in System Information Block type 5 (SIB 5) or System Information Block type 5bis (SIB 5bis) based on "Initial UE Identity" as follows:


"Index of selected Common H-RNTI" = "Initial UE Identity" mod K,

-
where K is equal to the number of listed Common H-RNTI. These Common H-RNTIs shall be indexed from 0 to K-1 in the order of their occurrence in SIB 5 or SIB 5bis, and "Index of selected Common H-RNTI" identifies the selected Common H-RNTI. "Initial UE Identity" refers to the Information Element included by the UE into the RRC CONNECTION REQUEST message. In the above formula, the parameter "Initial UE Identity" shall be interpreted as follows, depending on the choice of UE-Id type of the respective IE:


For UE-Id type "IMSI (GSM-MAP)", i.e. the IE is given as sequence of digits of type Integer(0..9), "Initial UE Identity" shall be interpreted as an integer number, where the first digit given in the sequence represents the highest order digit.


For UE-Id types "TMSI and LAI (GSM-MAP)" or "P-TMSI and RAI (GSM-MAP)", only the TMSI or P-TMSI parts given as Bitstring(32) shall be used, and "Initial UE Identity" shall be interpreted as a binary representation of an integer number, where the first bit in the Bitstring represents the highest order bit.

For UE-Id type "IMEI", i.e. the IE is given as sequence of hexadecimal digits of type Integer(0..15), "Initial UE Identity" shall be interpreted as a hexadecimal representation of an integer number, where the first digit given in the sequence represents the highest order digit.

For UE-Id type "IMSI (DS-41)", i.e. the IE is given as octet string, "Initial UE Identity" shall correspond to the decoded decimal representation of the IMSI-S part included in the octet string (see TIA/EIA/IS-2000-5).


For UE-Id types "ESN (DS-41)" or "TMSI (DS-41)", i.e. the IE is given as Bitstring(32), "Initial UE Identity" shall be interpreted as a binary representation of an integer number, where the first bit in the Bitstring represents the highest order bit.


For UE-Id type "IMSI and ESN (DS-41)" only the ESN part shall be used as "Initial UE Identity", as defined above.

After detecting the HS-SCCH with Common H-RNTI, the UE start reception of the corresponding HS-PDSCH(s) TTI.

那么這個(gè) "Index of selected Common H-RNTI" = "Initial UE Identity" mod K 的這個(gè)K是2么?指的是common H-RNTI的數(shù)量么?通常在SIB5里面的common H-RNTI都是固定的那兩個(gè)(9B CF 和 37 9E)。

另外這個(gè)Initial UE Identity它選用的是哪一個(gè)?有沒(méi)有什么規(guī)則?
如果上面的那個(gè)"K”就是2的話,那么這個(gè)"Index of selected Common H-RNTI"如何算數(shù)來(lái)呢?

請(qǐng)高手們出來(lái)幫忙解答解答!
先謝謝了!
掃碼關(guān)注5G通信官方公眾號(hào),免費(fèi)領(lǐng)取以下5G精品資料
  • 1、回復(fù)“YD5GAI”免費(fèi)領(lǐng)取《中國(guó)移動(dòng):5G網(wǎng)絡(luò)AI應(yīng)用典型場(chǎng)景技術(shù)解決方案白皮書(shū)
  • 2、回復(fù)“5G6G”免費(fèi)領(lǐng)取《5G_6G毫米波測(cè)試技術(shù)白皮書(shū)-2022_03-21
  • 3、回復(fù)“YD6G”免費(fèi)領(lǐng)取《中國(guó)移動(dòng):6G至簡(jiǎn)無(wú)線接入網(wǎng)白皮書(shū)
  • 4、回復(fù)“LTBPS”免費(fèi)領(lǐng)取《《中國(guó)聯(lián)通5G終端白皮書(shū)》
  • 5、回復(fù)“ZGDX”免費(fèi)領(lǐng)取《中國(guó)電信5G NTN技術(shù)白皮書(shū)
  • 6、回復(fù)“TXSB”免費(fèi)領(lǐng)取《通信設(shè)備安裝工程施工工藝圖解
  • 7、回復(fù)“YDSL”免費(fèi)領(lǐng)取《中國(guó)移動(dòng)算力并網(wǎng)白皮書(shū)
  • 8、回復(fù)“5GX3”免費(fèi)領(lǐng)取《 R16 23501-g60 5G的系統(tǒng)架構(gòu)1
  • 對(duì)本帖內(nèi)容的看法? 我要點(diǎn)評(píng)

     
    [充值威望,立即自動(dòng)到帳] [VIP貴賓權(quán)限+威望套餐] 另有大量?jī)?yōu)惠贈(zèng)送活動(dòng),請(qǐng)光臨充值中心
    充值擁有大量的威望和最高的下載權(quán)限,下載站內(nèi)資料無(wú)憂
    elvis130
    初級(jí)會(huì)員



     發(fā)短消息    關(guān)注Ta 

    積分 202
    帖子 42
    威望 2284 個(gè)
    禮品券 0 個(gè)
    專家指數(shù) -8
    注冊(cè) 2009-5-19
    專業(yè)方向  交換工程師
    回答問(wèn)題數(shù) 0
    回答被采納數(shù) 0
    回答采納率 0%
     
    發(fā)表于 2011-12-12 10:15:15  只看樓主 
    有沒(méi)有高手出來(lái)說(shuō)說(shuō)呀,那么多天了,竟然一個(gè)回復(fù)的人都沒(méi)有!

    對(duì)本帖內(nèi)容的看法? 我要點(diǎn)評(píng)

     
    [立即成為VIP會(huì)員,百萬(wàn)通信專業(yè)資料立即下載,支付寶、微信付款,簡(jiǎn)單、快速!]
    魚(yú)兒
    金牌會(huì)員
    鎵嬫満鍙風(fēng)爜宸查獙璇? style=


     發(fā)短消息    關(guān)注Ta 

    C友·進(jìn)步勛章   紀(jì)念勛章·七周年   財(cái)富勛章·萬(wàn)元戶   活動(dòng)·積極勛章   財(cái)富勛章·財(cái)運(yùn)連連   財(cái)富勛章·小財(cái)主   財(cái)富勛章·神秘富豪   紀(jì)念勛章·四周年   紀(jì)念勛章·六周年   紀(jì)念勛章·八周年  
    積分 5817
    帖子 548
    威望 210777 個(gè)
    禮品券 50 個(gè)
    專家指數(shù) 229
    注冊(cè) 2009-3-27
    專業(yè)方向  通信
    回答問(wèn)題數(shù) 0
    回答被采納數(shù) 0
    回答采納率 0%
     
    發(fā)表于 2011-12-12 12:59:30 
    1) common H-RNTI作用
    為了能從HS-DSCH接收數(shù)據(jù),UE需要一個(gè)標(biāo)識(shí)符,用它來(lái)對(duì)應(yīng)在共享信道HS-DSCH上為UE指定的資源,在CELL_DCH狀態(tài)這個(gè)標(biāo)識(shí)符為dedicate H-RNTI,在CELL_FACH下則是common H-RNTI。
    2) common H-RNTI由何而來(lái)?
    系統(tǒng)消息HS-DSCH Common system information中會(huì)包含一個(gè)common H-RNTI列表,UE會(huì)從中選擇一個(gè)使用
    the UE shall select a Common H-RNTI from the Common H-RNTIs listed in System Information Block type 5
    3) index of comman H-RNTI(index選擇規(guī)則)
    a>UE是連接模式(Connected mode)
    UE通過(guò)U-RNTI獲取:"Index of selected Common H-RNTI" = U-RNTI [mod K]
    b>非連接模式
    UE通過(guò)RRC Conection Request 消息獲得H-RNTI list和一個(gè)Initial UE Identity,相似的方式獲得其index:"Index of selected Common H-RNTI" = "Initial UE Identity" [mod K]
    而這條消息會(huì)告知Initial UE Identity類別,在樓主提供的信息中也有詳細(xì)介紹:For UE-Id type "IMSI (GSM-MAP)", "TMSI and LAI (GSM-MAP)" , "IMEI"......

    綜上,
    1)Initial UE Identity根據(jù)UE-Id由RRC Con. setup告知,算法其實(shí)樓主給的文檔里面也已經(jīng)指明。
    2)K為H-RNTI list中H-RNTI的個(gè)數(shù),最大取值應(yīng)該是4
    3)核心公式"Index of selected Common H-RNTI" = "Initial UE Identity" mod K
    舉例Initial UE Identity=25,K=4,則Index of selected Common H-RNTI=25 mod 4,取模計(jì)算法則樓主如果不懂可以去翻翻數(shù)學(xué)書(shū)籍,很簡(jiǎn)單的

    [ 本帖最后由 魚(yú)兒 于 2011-12-12 13:02 編輯 ]

    對(duì)本帖內(nèi)容的看法? 我要點(diǎn)評(píng)

     
    最新通信職位:廣東通信人才網(wǎng) | 北京通信人才網(wǎng) | 上海通信人才網(wǎng) | 南京通信人才網(wǎng) | 西安通信人才網(wǎng) | 重慶通信人才網(wǎng) | 中國(guó)通信人才網(wǎng)
    elvis130
    初級(jí)會(huì)員



     發(fā)短消息    關(guān)注Ta 

    積分 202
    帖子 42
    威望 2284 個(gè)
    禮品券 0 個(gè)
    專家指數(shù) -8
    注冊(cè) 2009-5-19
    專業(yè)方向  交換工程師
    回答問(wèn)題數(shù) 0
    回答被采納數(shù) 0
    回答采納率 0%
     
    發(fā)表于 2011-12-21 18:09:02  只看樓主 
    首先先非常感謝 魚(yú)兒 的回帖。
    還有些疑問(wèn)想跟你請(qǐng)教喔:上面的那個(gè)K的確為H-RNTI list中H-RNTI的個(gè)數(shù),
    但通常在SIB5消息里面,只能找到其中兩個(gè),那么這種情況那個(gè)K值應(yīng)該取2還是4呢?
    我個(gè)人覺(jué)得應(yīng)該是2.
    在一些資料里面,找到下面的這個(gè)算法,
    H-RNTI shall be allocated by using following algorithm:
    p(0) = 0
    p(n) = mod(p(n-1)+39887, 65536)
    , where p(n) is H-RNTI. n shall be selected from range 0 - 3 for common H-RNTIs so that:
    - value 0 is used for BCCH Specific HS-DSCH-RNTI
    - value 1 is used for CCCH common H-RNTI
    - value 2 is used for DCCH SRB1 common H-RNTI
    - (value 3 spare for future use)
    那么按照這個(gè)算法的話,好像就是說(shuō)只有value1 和value2這兩種情況產(chǎn)生的H-RNTI才是common H-RNTI,是吧?

    另外,“Initial UE Identity” 可以是 "IMSI (GSM-MAP)", "TMSI and LAI (GSM-MAP)" , "IMEI"...... 那么如果這個(gè)值是"TMSI and LAI (GSM-MAP)" =22 01 77 C3 26 2F 03 00 66 , K=2或K=4的話,那么"Index of selected Common H-RNTI" =??

    對(duì)本帖內(nèi)容的看法? 我要點(diǎn)評(píng)

     
    熱點(diǎn): 通信招聘職位 | 網(wǎng)絡(luò)優(yōu)化全集 | WCDMA精品 | TD-SCDMA學(xué)習(xí)資料 | EVDO | MGW媒體網(wǎng)關(guān)資料

    快速回復(fù)主題    
    標(biāo)題
    內(nèi)容
     上傳資料請(qǐng)點(diǎn)左側(cè)【添加附件】

    當(dāng)前時(shí)區(qū) GMT+8, 現(xiàn)在時(shí)間是 2025-06-06 07:52:39
    渝ICP備11001752號(hào)  Copyright @ 2006-2016 mscbsc.com  本站統(tǒng)一服務(wù)郵箱:mscbsc@163.com

    Processed in 0.420599 second(s), 15 queries , Gzip enabled
    TOP
    清除 Cookies - 聯(lián)系我們 - 移動(dòng)通信網(wǎng) - 移動(dòng)通信論壇 - 通信招聘網(wǎng) - Archiver