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4.7.3
GPRS attach procedureThe GPRS attach procedure is used for two purposes:
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normal GPRS attach, performed by the MS to IMSI attach for GPRS services only. The normal GPRS attach procedure shall be used by GPRS MSs in MS operation mode C, independent of the network operation mode. It shall also be used by GPRS MSs in MS operation modes A or B if the network operates in network operation mode II or III;
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combined GPRS attach procedure, used by GPRS MSs in MS operation modes A or B to attach the IMSI for GPRS and non-GPRS services provided that the network operates in network operation mode I.
attach的目的：
PS域附著，用于C類手機(jī)及網(wǎng)絡(luò)模式II或III的A、B類手機(jī)。
聯(lián)合（CS域、PS域）附著，用于網(wǎng)絡(luò)模式I下的A、B類手機(jī)。
With a successful GPRS attach procedure a GMM context is established.
附著成功后會(huì)建立GMM上下文。
Subclause 4.7.3.1 describes the GPRS attach procedure to attach the IMSI only for GPRS services. The combined GPRS attach procedure used to attach the IMSI for both GPRS and non-GPRS services is described in subclause 4.7.3.2.
If an IMSI attach for non-GPRS services is requested and a GMM context exists, the routing area updating procedure shall be used as described in subclause 4.7.5.2.
如果GMM上下文存在，但是需要CS域的IMSI附著，此時(shí)采用RAU。
To limit the number of subsequently rejected attach attempts, a GPRS attach attempt counter is introduced. The GPRS attach attempt counter shall be incremented as specified in subclause 4.7.3.1.5. Depending on the value of the GPRS attempt counter, specific actions shall be performed. The GPRS attach attempt counter shall be reset when:
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the MS is powered on;
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a SIM/USIM is inserted;
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a GPRS attach procedure is successfully completed;
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a combined GPRS attach procedure is completed for GPRS services only with cause #2, #16, #17 or #22; or
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a GPRS attach procedure is completed with cause #11, #12, #13 or #15,
and additionally when the MS is in substate ATTEMPTING-TO-ATTACH:
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expiry of timer T3302;
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a new routing area is entered; or
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an attach is triggered by CM sublayer requests.
附著計(jì)數(shù)器用于避免附著拒絕后無(wú)限制的附著嘗試。
重置：
手機(jī)開(kāi)機(jī)、插卡、attach完成、由原因#2，#16，#17，#22引起的聯(lián)合attach僅PS域成功、#11，#12，#13，#15引起的attach完成；
attempting-to-attach狀態(tài)時(shí)T3302超時(shí)、進(jìn)入新的RA、CM層觸發(fā)的attach
The mobile equipment shall contain a list of "forbidden location areas for roaming", as well as a list of "forbidden location areas for regional provision of service". The handling of these lists is described in subclause 4.4.1; the same lists are used by GMM and MM procedures.
禁止列表
The Mobile Equipment shall contain a list of "equivalent PLMNs". The handling of this list is described in subclause 4.4.1, the same list is used by GMM and MM procedures.
等價(jià)網(wǎng)絡(luò)列表
The network informs the MS about the support of specific features, such as LCS-MOLR, in the “Network feature support” Information Element. The information is either explicitly given by sending the “Network feature support” IE or implicitly by not sending it. The handling in the network is described in subclause 9.4.2.9. The MS may use the indication to inform the user about the availability of the appropriate services and it shall not request services that have not been indicated as available.
網(wǎng)絡(luò)會(huì)通過(guò)“Network feature”IE來(lái)告知MS其對(duì)特殊服務(wù)（如LCS-MOLR）的支持。MS會(huì)顯示的通知用戶某些服務(wù)的可用性從而避免用戶請(qǐng)求MS不支持的服務(wù)。
4.7.3.1
GPRS attach procedure for GPRS servicesThe GPRS attach procedure is a GMM procedure used by GPRS MSs to IMSI attach for GPRS services.
The attach type information element shall indicate "GPRS attach".
GPRS attach適用于MS PS域（GPRS業(yè)務(wù)）附著的GMM流程。
附著的類型為GPRS attach。
4.7.3.1.1
GPRS attach procedure initiationIn state GMM-DEREGISTERED, the MS initiates the GPRS attach procedure by sending an ATTACH REQUEST message to the network, starts timer T3310 and enters state GMM-REGISTERED-INITIATED.
MS在GMM-DEREGISTERED狀態(tài)下通過(guò)發(fā)送ATTACH REQUEST消息給網(wǎng)側(cè)發(fā)起GPRS附著流程。附著流程發(fā)起后MS會(huì)開(kāi)啟定時(shí)器T3310，并進(jìn)入GMM-REGISTERED-INITIATED狀態(tài)。
The MS capable both UMTS and GSM or only GSM system shall include a valid P-TMSI, if any is available, the P-TMSI signature associated with the P-TMSI and the routing area identity associated with the P-TMSI in the ATTACH REQUEST message. If there is no valid P-TMSI available, the IMSI shall be included instead of the P-TMSI and P-TMSI signature.
支持UMTS和GSM的雙模手機(jī)或者僅支持GSM的手機(jī)如果其有可用的P-TMSI及相應(yīng)的P-TMSI簽名、RAI，MS會(huì)將這些參數(shù)填到ATTACH REQUEST消息。如果沒(méi)有可用的P-TMSI，就選用IMSI來(lái)替代P-TMSI及其簽名。
The MS shall also indicate within the DRX parameters whether it supports the split pg cycle option on CCCH. The optional support of the split pg cycle on CCCH by the network is indicated in SI13 or PSI1. Split pg cycle on CCCH is applied by both the network and the MS when the split pg cycle option is supported by both (see 3GPP TS 45.002 [32]).
MS當(dāng)然也會(huì)包含指示其是否支持CCCH上的split pg cycle的DRX參數(shù)。
In UMTS, if the MS wishes to prolong the established PS signalling connection after the GPRS attach procedure, it may set a follow-on request pending indicator on.
UMTS時(shí)，如果MS希望在attach流程后延長(zhǎng)PS域信令連接，可以設(shè)置follow-on 請(qǐng)求指示。
4.7.3.1.2
GMM common procedure initiationThe network may initiate GMM common procedures, e.g. the GMM identification and GMM authentication and ciphering procedure, depending on the received information such as IMSI, CKSN, old RAI, P-TMSI and P-TMSI signature.
基于其收到的信息如IMSI、CKSN、old RAI、P-TMSI及P-TMSI簽名，網(wǎng)絡(luò)可能會(huì)發(fā)起GMM的公共流程（如GMM標(biāo)識(shí)、GMM鑒權(quán)及加密流程）。
4.7.3.1.3
GPRS attach accepted by the networkIf the GPRS attach request is accepted by the network, an ATTACH ACCEPT message is sent to the MS.
如果網(wǎng)側(cè)接受MS的attach請(qǐng)求，會(huì)發(fā)ATTACH ACCEPT給MS。
The P-TMSI reallocation may be part of the GPRS attach procedure. When the ATTACH REQUEST includes the IMSI, the SGSN shall allocate the P-TMSI. The P-TMSI that shall be allocated is then included in the ATTACH ACCEPT message together with the routing area identifier. The network shall, in this case, change to state GMM-COMMON-PROCEDURE-INITIATED and shall start timer T3350 as described in subclause 4.7.6. Furthermore, the network may assign a P-TMSI signature for the GMM context which is then also included in the ATTACH ACCEPT message. If the LAI or PLMN identity that has been transmitted in the ATTACH ACCEPT message is a member of any of the "forbidden" lists, any such entry shall be deleted. Additionally, the network shall include the radio priority level to be used by the MS for mobile originated SMS transfer in the ATTACH ACCEPT message.
In GSM, the Cell Notification information element shall be included in the ATTACH ACCEPT message by the network which indicates that the Cell Notification is supported by the network.
In UMTS, the network should prolong the PS signalling connection if the mobile station has indicated a follow-on request pending in ATTACH REQUEST. The network may also prolong the PS signalling connection without any indication from the mobile terminal.
P-TMSI分配可能會(huì)是GPRS attach流程的一部分。當(dāng)ATTACH REQUEST使用的是IMSI時(shí)，SGSN應(yīng)該分配P-TMSI給MS。分配的P-TMSI會(huì)與RAI一同寫(xiě)入ATTACH ACCEPT中。這種情況下網(wǎng)側(cè)會(huì)開(kāi)啟定時(shí)器T3350并進(jìn)入GMM-COMMON-PROCEDURE-INITIATED狀態(tài)。同時(shí)，網(wǎng)絡(luò)也可能會(huì)分配一個(gè)P-TMSI簽名用于GMM上下文，這個(gè)值同樣也會(huì)被寫(xiě)到ATTACH ACCEPT中去。如果ATTACH ACCEPT中包含的LAI或者PLMN ID恰好是禁止列表的一個(gè)成員，則此成員會(huì)從禁止列表中刪除。另外，網(wǎng)絡(luò)還會(huì)將MS發(fā)送SMS時(shí)用到的無(wú)線優(yōu)先級(jí)別一并于ATTACH ACCEPT中告知MS。
GSM時(shí)，ATTACH ACCEPT消息中還會(huì)包含Cell Notification的選項(xiàng)IE，用以指示網(wǎng)絡(luò)是否支持Cell Notification（小區(qū)通知）。
UMTS時(shí)，如果MS在ATTACH REQUEST中指明follow on，網(wǎng)絡(luò)會(huì)適當(dāng)延長(zhǎng)PS域的信令連接。當(dāng)然網(wǎng)側(cè)在沒(méi)有收到MS的follow on指示時(shí)，也可以延長(zhǎng)PS域的信令連接。
The MS, receiving an ATTACH ACCEPT message, stores the received routing area identification, stops timer T3310, reset the GPRS attach attempt counter, reset the routing area updating attempt counter, enters state GMM-REGISTERED and sets the GPRS update status to GU1 UPDATED.
MS收到網(wǎng)側(cè)的ATTACH ACCEPT消息，會(huì)保存收到的RAI，并停T3310定時(shí)器，將附著嘗試計(jì)數(shù)器、更新嘗試計(jì)數(shù)器清零，并將更新態(tài)設(shè)為GU1，進(jìn)入GMM-REGISTERED狀態(tài)。
If the message contains a P-TMSI, the MS shall use this P-TMSI as the new temporary identity for GPRS services. In this case, an ATTACH COMPLETE message is returned to the network. The MS shall delete its old P-TMSI and shall store the new one. If no P-TMSI has been included by the network in the ATTACH ACCEPT message, the old P-TMSI, if any available, shall be kept.
如果ACCEPT消息中包含P-TMSI，MS會(huì)用P-TMSI作為GPRS服務(wù)的新的臨時(shí)標(biāo)識(shí)，用于回復(fù)網(wǎng)側(cè)的ATTACH COMPLETE消息中。MS會(huì)刪除原來(lái)的P-TMSI，并保存新收到的P-TMSI。如果ACCEPT消息中并沒(méi)有P-TMSI，如有舊的P-TMSI可用，則需保留。
If the message contains a P-TMSI signature, the MS shall use this P-TMSI signature as the new temporary signature for the GMM context. The MS shall delete its old P-TMSI signature, if any is available, and shall store the new one. If the message contains no P-TMSI signature, the old P-TMSI signature, if available, shall be deleted.
如果ACCEPT消息中包含有P-TMSI signature，MS會(huì)使用P-TMSI signature作為GMM上下文的新的臨時(shí)簽名。當(dāng)然MS會(huì)刪除原來(lái)的P-TMSI signature并保存新的。如果消息中不含P-TMSI signature，舊的signature也是會(huì)被刪除的。
The network may also send a list of "equivalent PLMNs" in the ATTACH ACCEPT message. Each entry of the list contains a PLMN code (MCC+MNC). The mobile station shall store the list, as provided by the network, except that any PLMN code that is already in the "forbidden PLMN" list shall be removed from the "equivalent PLMNs" list before it is stored by the mobile station. In addition the mobile station shall add to the stored list the PLMN code of the network that sent the list. All PLMNs in the stored list shall be regarded as equivalent to each other for PLMN selection, cell selection/re-selection and handover. The stored list in the mobile station shall be replaced on each occurrence of the ATTACH ACCEPT message. If no list is contained in the message, then the stored list in the mobile station shall be deleted. The list shall be stored in the mobile station while switched off so that it can be used for PLMN selection after switch on.
網(wǎng)側(cè)發(fā)來(lái)的ACCEPT消息中還會(huì)包含等價(jià)網(wǎng)絡(luò)列表（equivalent PLMNs list），列表的每一項(xiàng)都會(huì)包含PLMN碼（MCC + MNC）。手機(jī)會(huì)保存此列表，如果列表中的某項(xiàng)恰好存于禁止列表（forbidden PLMNs list）中，該項(xiàng)在保存前就會(huì)被從等價(jià)網(wǎng)絡(luò)列表中刪除。MS還會(huì)將其所在的網(wǎng)絡(luò)加入到等價(jià)網(wǎng)絡(luò)列表中。等價(jià)網(wǎng)絡(luò)列表上的網(wǎng)絡(luò)在選網(wǎng)、小區(qū)選擇/重選、切換過(guò)程中被認(rèn)為是等價(jià)的。每次收到ACCEPT，等價(jià)列表都會(huì)重寫(xiě)。如果ACCEPT消息中不含等價(jià)列表，之前存儲(chǔ)的等價(jià)列表也會(huì)被刪除。該等價(jià)列表在MS關(guān)機(jī)時(shí)也會(huì)存在，以用于開(kāi)機(jī)后的選網(wǎng)。
After that in UMTS, if the mobile station has indicated follow-on request pending and has a CM application request pending, it shall send an appropriate message (for example ACTIVATE PDP CONTEXT REQUEST) to the network.
UMTS時(shí)，如果MS指示了follow on并有緩存的CM應(yīng)用請(qǐng)求，MS會(huì)發(fā)送相應(yīng)的消息（如ACTIVATE PDP CONTEXT REQUEST）到網(wǎng)側(cè)。
In GSM, if the ATTACH ACCEPT message contains the Cell Notification information element, then the MS shall start to use the LLC NULL frame to perform cell updates. The network receiving an ATTACH COMPLETE message stops timer T3350, changes to GMM-REGISTERED state and considers the P-TMSI sent in the ATTACH ACCEPT message as valid.
GSM時(shí)，如果ACCEPT中含有Cell Notification IE，MS會(huì)發(fā)送LLC空幀以發(fā)起小區(qū)更新。網(wǎng)絡(luò)收到ATTACH COMPLETE消息后會(huì)停止T3350定時(shí)器，進(jìn)入GMM-REGISTERED狀態(tài)，并認(rèn)為ACCEPT中含有的P-TMSI有效。
The network may also send a list of local emergency numbers in the ATTACH ACCEPT, by including the Emergency Number ListIE. The mobile equipment shall store the list, as provided by the network, except that any emergency number that is already stored in the SIM/USIM shall be removed from the list before it is stored by the mobile equipment. If there are no emergency numbers stored on the SIM/USIM, then before storing the received list the mobile equipment shall remove from it any emergency number stored permanently in the ME for use in this case (see 3GPP TS 22.101 [8]). The list stored in the mobile equipment shall be replaced on each receipt of a new Emergency Number ListIE.
網(wǎng)絡(luò)還會(huì)在ACCEPT的Emergency Number List IE中包含本地緊急呼叫號(hào)碼列表。手機(jī)會(huì)在收到的該列表后將列表中出已存在的號(hào)碼外的其他號(hào)碼保存。如果SIM/USIM中并未保存緊急號(hào)碼，在保存收到緊急呼叫列表前ME會(huì)從該列表中取出永久保存于ME中的緊急呼叫號(hào)碼。每次收到含Emergency Number List的信息時(shí)，該列表都會(huì)被覆蓋。
The emergency number(s) received in the Emergency Number List IE are valid only in networks with the same MCC as in the cell on which this IE is received. If no list is contained in the ATTACH ACCEPT message, then the stored list in the mobile equipment shall be kept, except if the mobile equipment has successfully registered to a PLMN with an MCC different from that of the last registered PLMN.
緊急呼叫號(hào)碼僅在同收到該列表的網(wǎng)絡(luò)MCC相同的小區(qū)內(nèi)使用。如ACCEPT中并無(wú)此列表，ME中保存的列表應(yīng)保留，除ME在與上次注冊(cè)的PLMN不同的MCC的PLMN中注冊(cè)成功外。
The mobile equipment shall use the stored list of emergency numbers received from the network in addition to the emergency numbers stored on the SIM/USIM or ME to detect that the number dialled is an emergency number.
NOTE:
The mobile equipment may use the emergency numbers list to assist the end user in determining whether the dialled number is intended for an emergency service or for another destination, e.g. a local directory service. The possible interactions with the end user are implementation specific.
ME利用存儲(chǔ)的從網(wǎng)側(cè)收到的緊急號(hào)碼及SIM/USIM中存儲(chǔ)的緊急 呼叫號(hào)碼判定用戶所撥打的是否為緊急呼叫。
ME可以利用緊急呼叫號(hào)碼列表來(lái)幫助用戶判斷所撥打的號(hào)碼是請(qǐng)求緊急服務(wù)還是其他的（如本地服務(wù)）。
The list of emergency numbers shall be deleted at switch off and removal of the SIM/USIM. The mobile equipment shall be able to store up to ten local emergency numbers received from the network.
關(guān)機(jī)和拔卡時(shí)緊急呼叫號(hào)碼列表會(huì)被刪除，列表中最多存儲(chǔ)十個(gè)號(hào)碼。
未完待續(xù)！
[ 本帖最后由 raulsyp 于 2010-8-25 23:32 編輯 ]
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