Teleservice 21, Short Message MT point-to-point (1), (2)
A T T R I B U T E S	1. HLC	1.1 Type or user information			short message, ≤ 160 characters
		1.2 Layer 4 protocol functions
		1.3 Layer 5 protocol functions			see TS 23.040
		1.4 Layer 6 protocol functions			see TS 23.040
		1.5 Layer 7 protocol functions			see TS 23.040
	2. LLC	2.1 Inform transfer	2.1.1 Information transfer capability		not applicable
			2.1.2 Information transfer mode		not applicable
			2.1.3 Information transfer rate		not applicable
			2.1.4 Structure		not applicable
			2.1.5 Establishment of connection		not applicable
			2.1.6 Communication configuration		not applicable
			2.1.7 Symmetry		not applicable
		2.2 Access at UE	2.2.1 Signalling access		see TS 27.005
			2.2.2 Information access (TS 22.001)	rate	not applicable
				interface
		2.3 Inter- working	2.3.1 Visible network type		not applicable (3)
			2.3.2 National/Internat. interworking		not applicable (3)
			2.3.3 Interface of TE to terminating Ntwk		not applicable (3)
	3. Gen	3.1 Supplementary service provided			TS 22.004
		3.2 Quality of service

Comments:

1. This service provides the transmission of a short message from a message handling system (service centre) to a user equipment. The service centre is functionally separated from the PLMN.
2. After reception an acknowledgement message should be sent back.
3. There is only an interworking between the PLMN and SMS Service Centre (SMS-SC). Connections from the fixed network to the SMS-SC are out of the scope of the 3GPP specifications.
4. The information transfer attributes refer to the connection-oriented services (ISDN, Bluebook Q.931). The Short Message Service is not a connection orientated service, hence the transfer attributes here are not applicable.
5. SMS MT/PP teleservice can be provided via both the CS and PS domains.

Teleservice 22, Short Message MO point-to-point (1), (2)
A T T R I B U T E S	1. HLC	1.1 Type or user information			short message, ≤ 160 characters
		1.2 Layer 4 protocol functions
		1.3 Layer 5 protocol functions			see TS 23.040
		1.4 Layer 6 protocol functions			see TS 23.040
		1.5 Layer 7 protocol functions			see TS 23.040
	2. LLC	2.1 Inform transfer	2.1.1 Information transfer capability		not applicable
			2.1.2 Information transfer mode		not applicable
			2.1.3 Information transfer rate		not applicable
			2.1.4 Structure		not applicable
			2.1.5 Establishment of connection		not applicable
			2.1.6 Communication configuration		not applicable
			2.1.7 Symmetry		not applicable
		2.2 Access at UE	2.2.1 Signalling access		see TS 27.005
			2.2.2 Information access (TS 22.001)	rate	not applicable
				interface
		2.3 Inter- working	2.3.1 Visible network type		not applicable (3)
			2.3.2 National/Internat. interworking		not applicable (3)
			2.3.3 Interface of TE to terminating Ntwk		not applicable (3)
	3. Gen	3.1 Supplementary service provided			TS 22.004
		3.2 Quality of service

Comments:

1. This service provides the transmission of a short message from a user equipment to a message handling system (service centre). The service centre is functionally separated from the PLMN.
2. After reception an acknowledgement message is sent back.
3. There is only an interworking between the PLMN and SMS Service Centre (SMS-SC). Connections from the fixed network to the SMS-SC are out of the scope of the 3GPP specifications.
4. The information transfer attributes refer to the connection-oriented services (ISDN, Bluebook Q.931). The Short Message Service is not a connection orientated service, hence the transfer attributes here are not applicable.
5. Information from the following sources at the UE might be transmitted:
   • a pre-recorded message in a store;
   • a number from the dialling key pad;
   • information from an external keyboard or terminal equipment connected to the ME.
6. SMS MO/PP teleservice can be provided via both the CS and PS domains.

Teleservice 23, Cell Broadcast Service
A T T R I B U T E S	1. HLC	1.1 Type or user information			short message, ≤ 93 characters (4)
		1.2 Layer 4 protocol functions
		1.3 Layer 5 protocol functions			see TS 23.041
		1.4 Layer 6 protocol functions			see TS 23.041
		1.5 Layer 7 protocol functions			see TS 23.041
	2. LLC	2.1 Inform transfer	2.1.1 Information transfer capability		not applicable
			2.1.2 Information transfer mode		not applicable
			2.1.3 Information transfer rate		not applicable
			2.1.4 Structure		not applicable
			2.1.5 Establishment of connection		not applicable
			2.1.6 Communication configuration		not applicable
			2.1.7 Symmetry
		2.2 Access at UE	2.2.1 Signalling access		not applicable
			2.2.2 Information access (TS 22.001)	rate	not applicable
				interface	not applicable
		2.3 Inter- working	2.3.1 Visible network type		(2)
			2.3.2 National/Internat. interworking		(2)
			2.3.3 Interface of TE to terminating Ntwk		(2)
	3. Gen	3.1 Supplementary service provided			TS 22.004
		3.2 Quality of service

Comments:

1. This service provides the transmission of a short message from a message handling system to all user equipments in the area of a Base Station. The service centre is functionally separated from the PLMN. There is no acknowledgement message after reception.
2. An interworking only with the Cell-Broadcast Service Centre is foreseen. Connections from the fixed network to the SC are out of the scope of the 3GPP specifications.
3. The information transfer attributes refer to the connection-oriented services (ISDN, Bluebook Q.931). The Short Message Service is not a connection orientated service, hence the transfer attributes here are not applicable.
4. 3GPP TS 23.041 provides up to 15 concatenated "pages" of up to 93 characters each.

Description of: 1 Introduction The purpose of this annex is to describe the short message teleservice. Three different types of short messages are defined, namely short message MT/PP (Mobile Terminated/Point-to-point), short message MO/PP (Mobile Originated/Point-to-point) and Cell Broadcast Service messages. 2 Definition of the short message service MT/PP and MO/PP For both mobile originated and mobile terminated services the Service Centre acts as store and forward centre. The Service Centre is functionally separate from the PLMN although this does not preclude an integrated implementation. More than one service centre may be connected to a PLMN. Messages may be input to the service centre from a fixed network customer by means of a suitable telecommunications service either from the fixed network, e.g. speech, telex, facsimile, etc. or from a mobile network customer. The list is not intended to be comprehensive and it is entirely open to the service centre provider what telecommunication services it supports. The service centre shall then reformat the message into that provided by the short message service, for delivery to the user equipment. For mobile originated SMS messages the SMT formats the message into that used by the SMS service and sends to the service centre (to allow interworking with ERMES also ERMES-format addresses may be sent from the UE to the SC). In general the user may use alphanumeric addresses for more user convenience. In principle the message may be intended for a subscriber on the fixed network or for another mobile subscriber. For the message to another mobile subscriber the service centre should deliver as described in this section. The message text is limited to a length of 160 characters. The originator does not need to know the location of the mobile subscriber to whom he wants to send a message. The message is addressed to the recipient's Directory Number. As a part of the basic service for both MT and MO, an acknowledgement will be provided on a message by message basis to the SC (MT) or UE (MO). This acknowledgement indicates that the PLMN has successfully transferred the message to the UE (MT) or SC (MO). Optionally, the SC may offer final delivery notification to the originator. In this case, the originator may request to have a notification returned from the SC informing her about the delivery of the Short Message to the recipient. This delivery report indicates whether this particular message has been correctly received at the receiving station or not, to the extent that the SC is able to establish this. It does not indicate whether the message has been read. If the delivery report is negative, i.e. the message has not been successfully delivered to the recipient, it shall include the failure cause. The delivery report is sent to the originator, if reachable, as soon as the information (positive or negative) is available. In addition, the SC may use the delivery report capabilities for other purposes, such as intermediate status reports etc. All point-to-point short messages are either to or from the service centre. A message from one user equipment to another must pass through a service centre. This case is effectively an MO and MT message together. The two transactions are separate, though clearly related. Point-to-point messages may be sent or received when the UE is engaged on a call (voice or data), or in idle mode. However, messages which overlap the boundary of such a call, or during a handover, may be lost, in which case they will be sent again. The accounting between the SC and PLMN if applicable is for agreement between those parties. The originator of a short message may notify the SC of an expiry time after which the message is no longer of value and may be deleted by the SC. During the validity period of the message, the SC shall try to deliver the message. After the expiry date the SC will take no further step to deliver the message, but its status may be kept by the SC to enable the originator to enquire the result. If the originator of the short message does not request any expiry time a standard value, e.g. 24 hours, is used. The Service Centre may give a short message a priority status. This priority message will be attempted to be delivered irrespective of whether or not the UE has been identified as temporarily absent. Delivery of non-priority messages will not be attempted if the UE has been identified as temporarily absent. If necessary, the originator may request the SC to perform specific operations on a previously submitted short message, such as provision/cancellation of a report or deletion of the short message. The recipient of a short message will be informed by the message about the date and time it was submitted to the SC. If the UE Message Store is full, the Message Store Overflow indicator is activated, and any further messages received will not be accepted. An appropriate specific non-acknowledgement message shall be returned. By help of an optional flow control mechanism further waiting short messages will be transmitted after the UE has memory available again. 3 Reply path The reply path facility is an enhancement to the point-to-point SMS. In the mobile originated case the mobile user will request his Service Centre to guarantee to forward a single reply to his message back to him (Reply Path). In the mobile terminated case the recipient of the Short Message will get an indication by the service centre that a reply via this Service centre will be accepted on a subscriptionless basis. The recipient may then submit a reply to this SC (within a period of time defined by the SC operator), which is then forwarded to the submitter of the original message. No subscription with the Service centre is needed by the replying user. The costs, if any, for the reply path are allocated to the originator. 4 Definition of the Cell Broadcast Service The cell broadcast service is a Teleservice which enables an Information Provider to submit short messages for broadcasting to a specified area within the PLMN. The cell broadcast service is characterized by the following aspects:

• No acknowledgement is sent from the UE.
• The cell broadcast message is sent in a limited area, defined by the originator of the message, by agreement with the PLMN.
• An identifier is associated with each message. This identifier is received by the UE and used by the short message function of the UE not to store broadcast messages which are not wanted or which have already been received.
• Generally, cell broadcast messages will be sent continuously, so that all such messages are sent in turn, and then repeated. The cycle time will need to be short enough for important messages to be received by travellers moving through a group of cells.
• Cell broadcast messages are MT only. The origination of these messages is outside the scope of 3GPP specifications.
• The maximum length of each cell broadcast message will be 93 characters.
• Cell broadcast DRX mode is defined to improve the battery life for User equipment. This feature is optional.
• Reception of CBS messages for a UE is not a requirement if it is connected in the CS domain. It should be possible for a UE to receive messages if it is connected in the PS domain and no data is currently transmitted.