1 MO SMS
2 MT SMS
3 SM-TL
短消息传输层(SM-TL)负责给短消息应用层(SM-AL)提供服务。
SM-TL可能包含下列PDU:
- SMS-DELIVER:把SMS从SC发送到MS。
- SMS-DELIVER-REPORT:
- 发送错误原因。
- 作为SMS-DELIVER 或者SMS-STATUS-REPORT的肯定或者否定信息的一部分。
- SMS-SUBMIT:把SMS从MS发送到SC。
- SMS-SUBMIT-REPORT:
- 发送错误原因。
- 作为SMS-SUBMIT 或者SMS-COMMAND的肯定或者否定信息的一部分。
- SMS-STATUS-REPORT:把状态报告从SC发送到MS。
- SMS-COMMAND:把命令从MS发送到SC。
3.1 SMS-DELIVER
Abbr. | Reference | P | R | Description |
---|---|---|---|---|
TP-MTI | TP-Message-Type-Indicator | M | 2b | 消息类型 |
TP-MMS | TP-More-Messages-to-Send | M | b | 是否有很多的要发送的消息 |
TP-LP | TP-Loop-Prevention | O | b | 禁止转发或自动生成消息的参数 |
TP-RP | TP-Reply-Path | M | b | 回复路径存在 |
TP-UDHI | TP-User-Data-Header-Indicator | O | b | TP-UD是否包含头域 |
TP-SRI | TP-Status-Report-Indication | O | b | 指示SME是否需要状态报告 |
TP-OA | TP-Originating-Address | M | 2-12o | SME的地址 |
TP-PID | TP-Protocol-Identifier | M | o | 如果有的话,表示上层协议 |
TP-DCS | TP-Data-Coding-Scheme | M | o | TP-User-Data使用的编码方式 |
TP-SCTS | TP-Service-Centre-Time-Stamp | M | 7o | SC接收SMS的时间 |
TP-UDL | TP-User-Data-Length | M | I | 指示TP-User-Data的长度 |
TP-UD | TP-User-Data | O | 依赖于TP-DCS |
Integer (I), bit (b), 2 bits (2b), Octet (o), 7 octets (7o), 2-12 octets (2-12o).
3.2 SMS-SUBMIT
Abbr. | Reference | P | R | Description |
---|---|---|---|---|
TP-MTI | TP-Message-Type-Indicator | M | 2b | 消息类型 |
TP-RD | TP-Reject-Duplicates | M | b | SC是否保留SMS-SUBMIT参数 |
TP-VPF | TP-Validity-Period-Format | M | 2b | 指示TP-VP是否存在 |
TP-RP | TP-Reply-Path | M | b | 回复路径请求的参数 |
TP-UDHI | TP-User-Data-Header-Indicator | O | b | 指示TP-UD是否包含头域 |
TP-SRR | TP-Status-Report-Request | O | b | 指示MS是否正在请求状态报告的参数 |
TP-MR | TP-Message-Reference | M | I | 标识SMS-SUBMIT的参数 |
TP-DA | TP-Destination-Address | M | 2-12o | 目的地SME的地址 |
TP-PID | TP-Protocol-Identifier | M | o | 指示上层协议 |
TP-DCS | TP-Data-Coding-Scheme | M | o | TP-UD使用的编码 |
TP-VP | TP-Validity-Period | O | o/7o | 消息不再有效的时间的参数。 |
TP-UDL | TP-User-Data-Length | M | I | TP-UD的长度 |
TP-UD | TP-User-Data | O | 依赖于TP-DCS |
Integer (I), bit (b), 2 bits (2b), Octet (o), 7 octets (7o), 2-12 octets (2-12o).
其他几个PDU参考TS23040,这里不详细描述了。
4 TP-DCS
bits7...4 | bits3...0 |
---|---|
00xx | Bit 5 = 0,表示文本没有压缩 Bit 5 = 1,表示文本被压缩了,压缩算法参考TS23042 Bit 4 = 0,表示Bit1和0为保留位,没有消息类型 Bit 4 = 1,表示Bit1和0表示消息类型。 BIt1 Bit0 消息类型 0 0 class 0 0 1 class 1 ME特定 1 0 class 2 (U)sim特定消息 1 1 class 3 TE特定 Bit3 Bit2 字符集 0 0 0 GSM 7 bit default alphabet 0 1 8 bit data 1 0 UCS2(16bit) 1 1 保留 |
由于目前看来TP-DCS比较多的使用表中的第一种类型,这里其他的情况就没有列出,详细可以参考TS12038-4
GSM SMS TPDU (GSM 03.40) SMS-SUBMIT
0... .... = TP-RP: TP Reply Path parameter is not set in this SMS SUBMIT/DELIVER
.0.. .... = TP-UDHI: The TP UD field contains only the short message
..0. .... = TP-SRR: A status report is not requested
...0 0... = TP-VPF: TP-VP field not present (0)
.... .1.. = TP-RD: Instruct SC to reject duplicates
.... ..01 = TP-MTI: SMS-SUBMIT (1)
TP-MR: 72
TP-Destination-Address - (0905296570)
Length: 10 address digits
1... .... = Extension: No extension
.000 .... = Type of number: Unknown (0)
.... 0001 = Numbering plan: ISDN/telephone (E.164/E.163) (1)
TP-DA Digits: 0905296570
TP-PID: 0
00.. .... = Defines formatting for subsequent bits: 0x0
..0. .... = Telematic interworking: no telematic interworking, but SME-to-SME protocol
...0 0000 = The SM-AL protocol being used between the SME and the MS: 0
TP-DCS: 8
00.. .... = Coding Group Bits: General Data Coding indication (0)
..0. .... = Text: Not compressed
...0 .... = Message Class: Reserved, no message class
.... 10.. = Character Set: UCS2 (16 bit)/UTF-16 (0x2)
.... ..00 = Message Class: Class 0 (0x0)
TP-User-Data-Length: (6) depends on Data-Coding-Scheme
TP-User-Data
SMS text: 101
这段消息可知,发送消息给0905296570,发送的消息是101,编码方式是UCS2。
5 TP-UDHI
指示TP-UD是否包含头域,一般情况下当消息比较长,被分段传输时,会用到这个字段。
- 0 表示TP-UD中只包含,消息文本
- 1 表示TP-UD中包含头域。
GSM SMS TPDU (GSM 03.40) SMS-DELIVER
0... .... = TP-RP: TP Reply Path parameter is not set in this SMS SUBMIT/DELIVER
//UDHI=1
.1.. .... = TP-UDHI: The beginning of the TP UD field contains a Header in addition to the short message
..1. .... = TP-SRI: A status report shall be returned to the SME
.... 0... = TP-LP: The message has not been forwarded and is not a spawned message
.... .0.. = TP-MMS: More messages are waiting for the MS in this SC
.... ..00 = TP-MTI: SMS-DELIVER (0)
TP-Originating-Address - (10086)
Length: 5 address digits
1... .... = Extension: No extension
.010 .... = Type of number: National (2)
.... 0001 = Numbering plan: ISDN/telephone (E.164/E.163) (1)
TP-OA Digits: 10086
TP-PID: 0
00.. .... = Defines formatting for subsequent bits: 0x0
..0. .... = Telematic interworking: no telematic interworking, but SME-to-SME protocol
...0 0000 = The SM-AL protocol being used between the SME and the MS: 0
TP-DCS: 8
00.. .... = Coding Group Bits: General Data Coding indication (0)
..0. .... = Text: Not compressed
...0 .... = Message Class: Reserved, no message class
.... 10.. = Character Set: UCS2 (16 bit)/UTF-16 (0x2)
.... ..00 = Message Class: Class 0 (0x0)
TP-Service-Centre-Time-Stamp
Year: 20
Month: 3
Day: 10
Hour: 18
Minutes: 47
Seconds: 18
Timezone: GMT + 8 hours 0 minutes
TP-User-Data-Length: (139) depends on Data-Coding-Scheme
TP-User-Data
User-Data Header
User Data Header Length: 6
IE: Concatenated short message, 16-bit reference number (SMS Control)
Information Element Identifier: 0x08
Length: 4
Message identifier: 7013
Message parts: 3
Message part number: 1
SMS text:
SMS-DELIVER是接收到的消息,TP-UDHI=0, 所以在TP-UD中包含了User-Data Header。Header中主要包括:
- Message identifier:消息ID
- Message parts:表示消息被分为了几部分
- Message part number: 表示当前是第几段
如果SMS被分为了几段发送,等UE接收到所有的消息之后,根据Header中的信息进行组合,然后上报给AP部分进行显示出来。
TS23040
TS23038