1、SMS (Short Message Service), MMS (Multi-Media Message Service),Sunplus PE2230 Rugger Yang 2006/07/05,Outlines,Introduction SMS Network Architecture SMS Transport Process SMS Elements SMS - Protocol Architecture Message Services MMS Network Architecture MMS Transport Process MMS Protocol Architecture
2、,SMS Introduction(1),Two types of GSM SMS have been defined Point to point SMS: Send short message to a user, and the short message entity (SME) are A mobile station A computer directly connected to the service center A device or computer located in the fixed networkPoint to omni-point (cell broadca
3、st SMS): Periodically deliver short messages to all subscribers in some cells,SMS Introduction(2),Three class of SMS have been defined Class 0: MS shall display the message immediately and shall not be automatically stored in the SIM or ME Class 1 (ME-specific): MS shall normally store the message i
4、n the ME by default, if that is possible, but otherwise the message may be stored in the SIM Class 2 (SIM-specific): MS shall ensure that the message has been transferred to the SMS data field in the SIM SMS Contents Capacity Max: 160 characters (7-bit code) or 70 alphabets (UCS-2 code)140 bytes * 8
5、 / 7 = 160 chars. More than 160 chars: SMS Concatenation SMS Compression,SMS Network Architecture,BST: Page the MS MSC: Broadcast the SMS to all its BSSs SM-SC: Store and Forward the SMS center GMSC: Forward the SMS to the MSC where the MS is IWMSC: Receive the SMS from the MS and transfer to SM-SC,
6、SMS - Elements,The SMS comprises elements particular to the submission and reception messages Validity-Period: How long the SC shall guarantee its existence in the SC memory before delivery to the recipient has been carried out. Service-Center-Time-Stamp: SC informs the recipient MS about the time o
7、f arrival of the short message at the SMTL entity of the SC More-Messages-to-Send: SC informs the MS that there is one or more messages waiting in that SC to be delivered to the MS Priority: indicate to the PLMN whether or not a message is a priority message Message-Waiting: enables the PLMN to prov
8、ide the HLR, SGSN and VLR with which the recipient MS is associated with the information that there is a message in the originating SC waiting to be delivered to the MS. Alert-SC: GSM PLMNs, to inform the SC that an MS to which a delivery attempt has failed because the MS is not reachable or because
9、 the MS memory capacity was exceededStatus report: the SC capability Successfully delivered to the SME Unsuccessfully delivered to the SME,SMS - Protocol Architecture (1),SM-AL: Short Message Application Layer SM_TL: Short Message Transport Layer SM_RL: Short Message Relay Layer SM_CM sublayer: Shor
10、t Message Connection Management,Short Message Transfer Layer,SM-TL: MS SM-TP SM-SC Transfers SM-AL Short Messages The Short Message Transfer Protocol is defined in SM-TL between MS and SM-SC Short Message Identifier (SMI) for every short message A short message may have the different SMI at MS and S
11、M-SC Four types of Transfer Protocol Data Unit SMS-SUBMIT (MS - SM-SC) VALIDITY PERIOD SMS-DELIVER (MS - SM-SC) SERVICE CENTER TIMESTAMP MORE-TO-SEND SMS-STATUS-REPORT (MS - SM-SC) SMS-COMMAND (MS - SM-SC),Short Message Relay Layer,SM-RL: MS SM-RP SM-SC Transfer SM-TL TPDUs and corresponding deliver
12、y reports Short Message Relay Entity at MS and the peer MSC The short message relay protocol (SM-RP) is defined in SM-RL between MS and MSC SM-RP provides interworks with TCAP/MAP in the MSC (TCAP/MAP is defined between MSC and IWMSC SM-RL SMI is mapped to and from the SM-TL SMI Four types of Relay
13、Protocol Data Unit RP-DATA (MS SM-SC) RP-SM-MEMORY-AVAILABLE (MS - NETWORK) RP-ACK (MS SM-SC) RP-ERROR (MS SM-SC),Connection Management Sub-layer,CM-Sub: MS SM-CP MSC Transfer RPDUs from SM-RL Short Message Control Entity at MS and the peer MSC The Short Message Control Protocol (SM-CP) is defined i
14、n SM-CM sub-layer between MS and MSCThe MS has two SMC entities for MO and MT message, but MS cannot simultaneously perform messaging in both directions Before any SM-CP message is delivered, an MM-connection must be established Three types of Control Protocol Data Unit CP-DATA (MS SM-SC) CP-ACK (MS
15、 SM-SC) CP-ERROR (MS SM-SC) Signal Channel Idle State: While MS is in idle state, the SMS will send or receive via Standalone Dedicated Control Channel (SDCCH) Connected State: While MS is on the connected state, the SMS will be send or received via Slow Associated Control Channel (SACCH),SMS - Mobi
16、le Originated,MS send the SMS to other MS First, SMS will be sent to IWMSC Then it will be stored in SM-SC Finally, it will be sent to the destination,SMS Mobile Terminated,MS receive the SMS SMS will send to SM-SC first Then GMSC will pass the SMS to MSC where the MS is MSC will request the BTSs to
17、 broadcast the SMS,Message Services,SMS (Short Message Service): only text 160 chars Via circuit switch or GPRS Stored in SM-SCEMS (Enhanced Message Service): text, simple picture and simple ring-tone 1KBMMS (Multi-Media Message Service): Text, Video (MPEG) , Audio (MP3, MIDI) , Image (JPEG, GIF for
18、mat) 3050 KB Via GPRS Stored in MS-SC,MMS Network Architecture (1),MMS Network Architecture (2),MMS Network Architecture (3),The interfaces in the MMS Reference Architecture are MM1: The reference point between the MMS User Agent and the MMS Relay/Server. MM2: The reference point between the MMS Rel
19、ay and the MMS Server. MM3: The reference point between the MMS Relay/Server and external (legacy) messaging systems (e.g. E-mail, Fax). MM4: The reference point between the MMS Relay/Server and another MMS Relay/Server that is within another MMSE. MM5: The reference point between the MMS Relay/Serv
20、er and the Home Location Register (HLR). MM6: The reference point between the MMS Relay/Server and the MMS User Databases. MM7: The reference point between the MMS Relay/Server and MMS VAS Applications.,MMS Transport Process,The Originator edits the MMS contents, then send it out via GPRS to MM-SC A
21、fter the MM-SC receive this MMS, it will return a message to the originator MM-SC will send a message to the receiver that have a MMS in MM-SC If the receive want to get this MMS, he could use the WAP get via GPRS While the receiver get the MMS, MM-SC will send a message to tell the originator his MMS has arrived,MMS Protocol Architecture,
