4 Changes to C.S2000-A C.S0002-A uses a permutation of the bits of the ESN for the Public Long Code Mask (PLCM) MC-MAP will use the TMSI or a mask supplied by the base station, which does not depend on the availability of ESN The BS indicates the the PLCM in the ECAM (PLCM_TYPE field) ESN-based Non-ESN-based example
5 Changes to LAC: Addressing in MC-MAP Strict layering in 3GPP requires the maintenance of 3 temporary mobile station identities: TMSI: Temporary Mobile Station Identity used by PSTN. Referred to as MAP-TMSI in MC-MAP, it is completely specified by TMSI (32bits) + MCC (3digits) + MNC (3digits) + LAC (16bits) P-TMSI: Packet network Temporary Mobile Station Identity. Referred as MAP-P-TMSI in MC-MAP, it is completely specified by P-TMSI (32bits) + MCC (3digits) + MNC (3digits) + LAC (16bits) + RAC(8bits) RNTI: Radio Network Temporary Identity used by RR layer to communicate with the corresponding peer entity at the other side. In MC-MAP, R-TMSI (Radio TMSI with structure similar to TMSI defined in C.S000X-A) is used in place of RNTI.
6 LAC Enhanced Services Enhanced services apply only to CM and MM messages Services: –In-Order Delivery of Layer 3 Messages –Prioritization: Messages are transmitted according to priorities assigned by Layer 3 –Service Access Point Multiplexing: Messages received and delivered from/to Layer 3 at several SAPIs –Outgoing Message Queues Flushing
7 LAC Enhanced Services (cont’d) Addition of an Enhanced Services Sublayer above the ARQ Sublayer on the dedicated channels (fwd and rev) Parameters of the Enhanced Services Sublayer: –SAPI: Service Access Point Identifier –ORD_IND: Indicates whether the message is to be delivered in order –L3_MSG_NUM: Sequence number used for ordering messages
8 RRC Procedures RRC Connection Management Procedures Radio Access Bearer (RAB) Procedures MS Capability Request/Response Procedures Direct Transfer Procedures Connected Mode Paging Procedures
9 RRC Connection Management Procedures RRC Connection Establishment –MS in “Idle” state (i.e. Monitoring f-csch) –RRC Connection initiated due to either 1) Request from MS upper layers, 2) General Page Message from the BS –MS initiates RRC Connection Establishment by sending a MC-MAP RRC Connection Request Message to the BS. –BS sends an Extended Channel Assignment Message in response to receiving this message. –Upon receiving the ECAM, MS transitions to the Mobile Station Control on the Traffic Channel State.
10 RRC Connection Management Procedures.. The MC-MAP RRC Connection Request Message contains: –Establishment Cause –MS Identity –MS Capability RRC Connection Release –Similar to connection release in cdma2000 –Using Release Order or Extended Release Message –Upon successful release of the RRC Connection, MS transitions to the “Idle” state
11 Radio Access Bearer (RAB) Procedures A RAB instance in MC-MAP corresponds to a service option connection instance in cdma2000. –CON_REF corresponds to RAB instance identifier RABs are established, reconfigured, and released while the MS is in the Traffic Channel substate of the Mobile Station Control on the Traffic Channel State. RABs are established, reconfigured, and released through the cdma2000 service negotiation messages (Ex. Service Connect Message)
12 MS Capability Request/Response Procedures MS may receive a “MS Capability” Request from BS, while in “Idle” state or in the Traffic Channel substate of the Mobile Station Control on the Traffic Channel State BS requests MS capability through Status Request Message. MS responds with (Extended) Status Response Message. MS may also initiate sending “MS Capability” to BS
13 Direct Transfer Procedures Direct Transfer procedures are used to transparently carry upper layer (Non-Access Stratum) information between MS and BS Initial Direct Transfer via MC-MAP Initial L3 Message (MS to BS direction only) Subsequent Direct Transfers via MC-MAP L3 Message (both directions) Both messages carry (to route to the NAS entity): –CN_DOMAIN_ID –SERVCIE_DESCRIPTOR –FLOW_ID
14 Connected Mode Paging Procedures Used for paging the MS (Paging Type 2) while the MS is in the Traffic Channel substate of the Mobile Station Control on the Traffic Channel State, to establish a new call. Implemented through a modified version of the cdma2000 Call Assignment Message. The message carries: –CN Domain Identity –Service Option Number –MC_MAP_BLOB field carries “paging record type identifier”
15 MS ID Choice of MS identity by base station: –If temporary identity is assigned, choice of the MS identity depends on where the message/order originates from (IP/PSTN/RAN) –If MAP-TMSI or MAP-P-TMSI are not assigned, the corresponding CN may address the mobile station by IMSI/IMEI. Choice of its identity by mobile station: Preference order is R-TMSI, MAP-TMSI/MAP-P-TMSI, IMSI, IMEI If R-TMSI is not assigned, RR-level communication can not occur between the mobile station and the base station. RRC Connection on common channels - is achieved by maintaining valid R-TMSI while the mobile station is monitoring common channels. - in MC-MAP, the mobile station achieves it by RR-level Registration.
16 MC-MAP Intersystem Handoff Objective –Seamless handoff from/to MC-MAP to/from GSM (and DS-MAP) Implementation –Minimum changes to IS-2000 –Transport of the GSM Handover Command Note: GPRS does not need handoff (location update is used instead)
17 MC-MAP to GSM Handoff Old MC-MAP BS New GSM BSS GSM MSC 6. CF Search Report 5. Measurements 7. HO Required 8. HO Request FCCH+SCH 1.Search trigger 2. CF Search Req. 12. TCH 3. CF Search Resp. 4. CF Search Ctrl 9. HO Request Ack (Handover Command) 10. Handover Command 11.Handover Command
23 Example Mobile Originated Call Setup Message Flow
24 Example Mobile Terminated Call Setup Message Flow
25 Example Mobile Originated Call Release Message Flow
26 Message Usage in MC-MAP The MC-MAP messaging consists of the following: –RRC Layer Messages: >some cdma2000 messages used as they are >some cdma2000 messages used with modifications >new RRC messages defined for MC-MAP –Some cdma2000 messages (corr. to MM & CM functionality) are not used in MC-MAP –MM & CM Layer messages: GSM-MAP messages defined in 3GPP. Similar classification for cdma2000 “Orders” and “Information Records”
27 Examples of cdma2000 Messages used as they are in MC-MAP Pilot Strength Measurement Message (r-dsch) Outer Loop Report Message (r-dsch) Supplemental Channel Request Message (r-dsch) Extended CDMA Channel List Message (f-csch) Universal Neighbor List Message (f-csch) Service Connect Message (f-dsch) Power Control Message (f-dsch) Resource Allocation Message (f-dsch)
28 Examples of cdma2000 Messages used with Modifications in MC-MAP Candidate Frequency Search Report Message (new SEARCH_MODE for GSM channel search) Systems Parameters Message (ignore SID, NID, REG_ZONE) Security Mode Command Message (new fields CN_ENC_DOMAIN, CONC_EXT_SEQ_H) MC-RR Parameters Message (added R_TMSI related fields) Universal Handoff Direction Message (ignore PACKET_ZONE_ID, etc.) Call Assignment Message (ignore RESPOND_IND, TAG, etc.; new field MC_MAP_BLOB to carry NAS info)
29 Examples of cdma2000 Messages not used in MC-MAP Registration Message (MM) Origination Message (replaced by new RRC conn req msg) Page Response Message (replaced by new RRC conn req msg) Flash With Information Message (CM) Enhanced Origination Message (CM) Authentication Challenge Message (MM) ANSI-41 System Parameters Message (CM) Alert With Information Message (CM) TMSI Assignment Message (MM)
31 New Messages defined in MC-MAP (BS side) f-csch: –MC-MAP Sync Channel Message >Core network identification is sent encapsulated in CN_ID records. >CDMA MC-specific parameters may be read from Sync Channel Message. –MC-MAP System Information Message >sends core network identification and information encapsulated in CN_INFO records. –MC-MAP L3 Message –Radio TMSI Assignment Message f-dsch: –MC-MAP L3 Message –Radio TMSI Assignment Message
32 Examples of cdma2000 “Orders”usage in MC-MAP Used as they are: –Mobile Station Acknowledgement Order –Pilot Measurement Request Order Used with mods: –Mobile Station Reject Order (some “reasons” not used) Not Used: –Connect Order (CM) –Registration Accepted Order (MM) No new orders defined for MC-MAP
33 Examples of cdma2000 “Information Records”usage in MC-MAP Used as they are: –Multiplex Option Information –Non-Negotiable Service Configuration Used with mods: –Security Status (ignore AUTH_MODE) –Service Configuration (new field CN_ENC_DOMAIN) Not Used: –Calling Party Number (CM) –Call Waiting Indicator (CM) No new information records defined for MC-MAP