1、ELECOMMUNICATION STANDARD 2nd FINAL DRAFT prl-ETS 300 022-2 Julv 1993 Source: KSI TC-SMG Reference: GSM 04.08-DCS UDC: 621.396.21 Kev words: European digital cellular telecommunications system, Global System for Mobile Communications (G SM i European digital cellular telecornmunications system (phas
2、e 1 ); Mobile radio interface layer 3 specification Part 2: DCS extension (GSM 04.08-DCS) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE Tel.: + 33 9
3、2 94 42 O0 - Fax: + 33 93 65 47 16 European Telecommunications Standards Institute 1 993. All rights reserved. q3lb33 it measures the radio propagation for connection with other cells. Measurements are treated to assess the need of a cell change as specified in Rec. GSM 05.08. When a cell change is
4、decided, the MS switches to the BCCH of the new cell. The broadcast information is then checked to verify the allowance to attach to this cell (cf. section 3.2.2). If allowed, the cell change is confirmed, and the broadcast information is then treated for mobility management actions (cf. section 4).
5、 Similarly, physical contexts are updated (list of neighbouring cells frequencies, thresholds for some actions, etc. cf. Rec. GSM 05.08 and section 3.2.2). 3.2.2 Network side 3.2.2.1 System information broadcasting SYSTEM INFORMATION TYPE 1 to 4 messages, and-qetionalmPE 2bis. are regularly broadcas
6、t by the network on the BCCH. Based on this information the Mobile Station is able to decide whether and how it may gain access to the system via the current cell. I Note: The exact order of sending SYSTEM INFORMATION messages on the BCCH is specified in Rec. GSM 05.02. The same information is sent
7、in SYSTEM INFORMATION TYPE 5-anL 6 ptionaly 5bi6, on the SACCH just after handover, and whenever there is no other use of that channel. I The information broadcast may be grouped in the following classes: - information giving unique identification of the current network, location area and cell; - in
8、formation used for cell selection and candidate cell measurements for handover procedures; - information describing the current control channel structure; - information controlling the random access channel utilisation;. and - information defining different options supported within the cell. 3.2.2.2
9、 Paging The network is required all paging subchannels. to send valid layer 3 messages continuously on 8 m 3404583 0093289 802 m GSM 04.08-DCS - 3.1.0 - page 74 4.4.1 Location updating procedure The location updating procedure is a general procedure which is used for the following purposes: - normal
10、 location updating (described in this section); - periodic updating (see section 4.4.2); - IMSI attach (see section 4.4.3) . The normal location updating procedure is used to update the registration of the actual Location Area of a Mobile Station in network. The location updating type information el
11、ement in the LOCATION UPDATING REQEST message shall indicate normal location updating. The location updating procedure is only performed if a subscriber identity module is available in the Mobile Station. It is initiated when the Location Area Identification received on the BCCH of the current servi
12、ng cell (chosen as specified in RecGSM 05.08) differs from the value stored , e.g. if: the i) the Mobile Station has been switched on in a Location Area different from the one stored in a non volatile memory or when there is no stored Location Area Identification; ii) the Mobile Station moves across
13、 the boundaries of a Location Area while being in the “idle“ state; The location updating procedure is also started if the network indicates that the Mobile Station is unknown in the VLR as a response to MM-connection establishment request. emts made, where locati- winqis Ed. unsucc s ful The attemt
14、 counter is res Jn when is B wi tc h 9 d on= a SIM card is inserted. Upon successful location updating the Mobile Station stores the received Location Area Identification in a non-volatile memory and the attempt counter shall be reset. The detailed handling of the attempt counter is described in 4.4
15、.4.5 to 4.4.4.8. The Mobile BauiDment shall contain a list of “forbidden location areax for national roaminae r d wh n h MS 88 i witched off oren and De /TEM INFORMATION mbi 6 J I I O O O 1 O - - - Miscellaneous messages: I O O O - CHANNEL MODE MODIFY I I 1 1 O O - FREQUENCY REDEFINITION I 1 O 1 - M
16、EACUREMENT REPORT I I 11 O - CLASS- CHANGE 1 I 1 1 1 1 - CHANNEL MODE MODIFY ACKNOWLEDGE1 TABLE 10.3/GSM 04.08 (page 2 of 2) Message type6 for radio re6ources management Note: Bit 8 is reserved for possible future use as an extension bit. m 3404583 O093303 TO2 m GSM 04.08 v.3.8.0 - page 304 Updated
17、October 1991 10.5.2 Radio resources management information elements. For the radio resources management information elements listed below, the coding of the information element identifier bits is summarized in Table 10.13/GSM 04.08. i Reference i Length in i I section I octets I I I 1) I I 18 7 6 5
18、4 3 2 1 I Il:- IOOl- I Oll- I101- I 10 : : : . . . . I I I I I I I I Type 1 info elements I I Cipher mode setting 110.5.2.7 I F1 Page mode (10.5.2.141 F1 Synchronisation 110.5.2.211 F1 indication I I I I Type 3 it Bit Bit - octet 3 120 I 119 I 118u 116 I 115 I 114 I 113 L LBit i BuBit i Bit I Bit (t
19、 I Bit t Bit loctet 17 O08 LI 007 O0 4 002 I o O1 1 I FIG= 10.20/GSM 04.08 Cell Channel descriDtion information glement ueneral formatl, 25 3404583 009330b 711 GSM 04.08-DCS - 3.1.0 - page 307 J EXT-IND, Extension indication (octet 2. bit 6) I )ewhetberemnt I whether lementarv L J information elemen
20、r is sent in another messacre. 1 I I Note : This indicator is set to 1 in the two It ell ion ) fields when two are needed to gescribe the I Lfreuuencv N = 1, 2, , 124. I I For a RF channel with ARFCN = N not belonging to I the cell allocation the CA RRFCN N bit is coded I with a N = 1, 2 , 124. I I
21、I I I I I I I I I J TABLE 10.14a/GSM 04.08 Cell channel description information element, bit man O fo-3 I 3404583 0093308 594 = GSM 04.08-DCS - 3.1.0 - page 307b -1.3 Ranae 1024 format _s- 8 7 6 4 3 2 1 1 O 1 1 O 1 oc et 1 Li deBCriDtlOn IEI 1 I i I I -I J1 01 EXT- I 0101 I I t I octet 2 I FORMAT-ID
22、 I INDlBDarelFORMAl FO I W(1) 4 I I IT-ID I I fhiuh Dart) I I I I I I I I octet 3 rt I octet 4 I octet 5 3 ow rt 1 i J W(2) I W (15) (hiuh Dart) I : W(1 o tet 17 )(low part) I I I I o FIGURE lO.ZOb/GSM 044 Cell Channel descriDtion information element (1024 ranae format) 3q04583 0093309 420 GSM 04.08
23、-DCS * 3.1.0 - page 307C freauencv O indicator (octet 2. bit 4) : L I I I c Il freauencv of ARFCN O is in the list L O I L J w(i). i from 1 to 16 (octet 2 to 1 7. 1 . I I I J I J format. I Each W(i) encodes a non neaat ive intecrer in binarv I W 1 mu t be null also. c J Ea11 oehrwih Lias a on f a re
24、 aiven in sect ion L J srne D revious W (i) the AR FCN F (k) of a frecniencv in I TABLE lO.l4b/GSM 04.08 all channel descriDtion -ation ament, ran- m 3404583 0093330 142 m GSM 04.08-DCS - 3.1.0 - page 307d 10.5.2.1.4 Ranse 512 format 8 7 6 5 4 3 2 1 FIOURE 10.20c/GSM 04 .o$ Cell Channel descriotion
25、information element (512 rame formatL 3404583 00933LL O89 GSM 04.08-DCC - 3.1.0 - page 307e A L E 2. 3 and 4) I I L I element. L This field encodes t he ARFCN of a freauencv in the Is et. This vaue is also used to oecode the rest o fh t e L I I I L I I w(i). i from 1 to 17 (octet 4 to 17) : L I I ms
26、 a no n nesative inteuer in binarv I J f0-t- I I I L L- I L I If W(k) is null, W(k+l) to W(17) must be null also. Inon null W(k) allo ws to COmD Ute, tosef her with met. The conmutation formmas are &ven in section L e Drevious W (i) the ARFCN P &of a f re- in I I 2 I I TABLE 10.14c/GCM 04.08 Cell channel descriDtion information element, ranae 512 format
