11.2.18 Packet System Information Type 1
3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS
This message is sent by the network on the PBCCH or PACCH giving information for Cell selection, for control of the PRACH, for description of the control channel(s) and global power control parameters. This message shall not be segmented across more than one RLC/MAC control block by using the procedures specified in sub-clause 9.1.12a. Special requirements for the transmission of this message apply on the PBCCH, see 3GPP TS 45.002.
Message type: PACKET SYSTEM INFORMATION TYPE 1
Direction: network to mobile station
Classification: distribution message
Table 11.2.18.1: PSI1 information elements
< PSI1 message content > ::= < PAGE_MODE : bit (2) > < PBCCH_CHANGE_MARK : bit (3) > < PSI_CHANGE_FIELD : bit (4) > < PSI1_REPEAT_PERIOD : bit (4) > < PSI_COUNT_LR : bit (6) > { 0 | 1 < PSI_COUNT_HR : bit (4) > } < MEASUREMENT_ORDER: bit (1) > < GPRS Cell Options : < GPRS Cell Options IE > > < PRACH Control Parameters : < PRACH Control Parameters IE > > < PCCCH Organization Parameters : < PCCCH Organization Parameters IE > > < Global Power Control Parameters : < Global Power Control Parameters IE > > < PSI_STATUS_IND : bit > { null | 0 — Receiver backward compatible with earlier release | 1 — Additions in release 99 : < MSCR : bit > < SGSNR : bit > < BAND_INDICATOR : bit > { null | 0 — Receiver backward compatible with earlier release | 1 — Additions in Rel-6 : { 0 | 1 < LB_MS_TXPWR_MAX_CCH : bit (5) > } < padding bits > } } ! < Distribution part error : bit (*) = < no string > > ; |
Table 11.2.18.2: PSI1 information element details
GPRS Cell Options |
Global Power Control Parameters |
MEASUREMENT ORDER (1 bit field) |
PAGE_MODE (2 bit field) |
PBCCH_CHANGE_MARK (3 bit field) |
PSI_CHANGE_FIELD (4 bit field) Bit 4 3 2 1 0 0 0 0 Update of unspecified PSI message(s); 0 0 0 1 Unknown 0 0 1 0 PSI2 updated 0 0 1 1 PSI3/PSI3bis/PSI3ter/PSI3quater updated 0 1 0 0 Unknown — This value was allocated in an earlier version of the protocol and shall not be used 0 1 0 1 PSI5 updated 0 1 1 0 PSI6 updated 0 1 1 1 PSI7 updated 1 0 0 0 PSI8 updated All other values shall be interpreted as ‘Update of unknown SI message type’. |
PSI1_REPEAT_PERIOD (4 bit field) Bit |
PSI_COUNT_LR (6 bit field) Bit |
PSI_COUNT_HR (4 bit field) Bit |
PCCCH Organization Parameters |
PRACH Control Parameters |
PSI_STATUS_IND (1 bit field): |
MSCR, MSC Release (1 bit field): |
SGSNR, SGSN Release (1 bit field) |
BAND_INDICATOR (1 bit field) |
LB_MS_TXPWR_MAX_CCH (5 bit field) The LB_MS_TXPWR_MAX_CCH field is coded as the binary representation of the ‘power control level’ in 3GPP TS 45.005 corresponding to the maximum TX power level a mobile station may use when accessing on a packet control channel. This value shall be used by the mobile station according to 3GPP TS 45.008. |
NOTE 1: The MSC Release bit indicates the version of the MSC specific protocols and is not applicable to access stratum protocols.
NOTE 2: The SGSN Release bit indicates the version of the SGSN specific protocols and is not applicable to access stratum protocols.