阅读说明：本技术 一种确定ssc模式的方法及装置 (Method and device for determining SSC mode ) 是由 朱强华 朱奋勤 吴问付 于 2019-02-13 设计创作，主要内容包括：本申请公开了一种确定SSC模式的方法及装置,该方法包括：终端设备确定请求的SSC模式,以及向第一核心网网元发送第一请求消息,所述第一请求消息用于请求建立第一PDU会话,所述第一请求消息中包括所述第一PDU会话的会话类型、请求的SSC模式和第一指示信息；由于终端设备向第一核心网网元发送的第一请求消息中可携带第一指示信息,用于指示终端设备请求的SSC模式不允许被修改,从而避免后续网络侧的网元产生错误的决定,比如将请求的SSC模式修改为终端设备不支持的其它SSC模式。(The application discloses a method and a device for determining an SSC mode, wherein the method comprises the following steps: the method comprises the steps that terminal equipment determines a requested SSC mode and sends a first request message to a first core network element, wherein the first request message is used for requesting to establish a first PDU session, and the first request message comprises a session type of the first PDU session, the requested SSC mode and first indication information; since the first request message sent by the terminal device to the network element of the first core network may carry first indication information for indicating that the SSC pattern requested by the terminal device is not allowed to be modified, thereby avoiding a subsequent network element at the network side from making an erroneous decision, such as modifying the requested SSC pattern into another SSC pattern that is not supported by the terminal device.)

A method of determining a traffic and session continuity, SSC, pattern, the method comprising:

the terminal equipment determines the SSC mode of the request;

the terminal equipment sends a first request message to a first core network element, wherein the first request message is used for requesting to establish a first PDU session, and the first request message comprises the session type of the first PDU session and a requested SSC mode.

The method of claim 1, wherein the first request message further comprises first indication information indicating that a requested SSC pattern is not allowed to be modified.

The method of claim 1 or 2, wherein the terminal device determines the requested SSC pattern before, further comprising:

the terminal equipment sends the capability information of the terminal equipment to a second core network element, wherein the capability information of the terminal equipment is used for indicating whether the terminal equipment supports SSC mode 3 of Non-IP conversation;

the terminal device receives first SSC mode restriction information from the second core network element, wherein the first SSC mode restriction information is determined by one or more of capability information of the terminal device, subscription information of the terminal device and network capability information, the subscription information is used for indicating a session type and an associated SSC mode of a PDU session allowed by the terminal device, and the network capability information is used for indicating whether a network supports SSC mode 3 of a Non-IP session;

the terminal device determines a requested SSC pattern, including:

the terminal device determines a requested SSC pattern based on a session type of a first PDU session and the first SSC pattern restriction information.

The method of claim 1 or 2, wherein the terminal device determines the requested SSC pattern before, further comprising:

the terminal device receives first SSC mode restriction information from a third core network element, wherein the first SSC mode restriction information is determined by one or more of capability information of the terminal device, subscription information of the terminal device, network capability information and an Application Function (AF) policy, the capability information of the terminal device is used for indicating whether the terminal device supports SSC mode 3 of a Non-IP session, the subscription information is used for indicating a session type of a PDU session allowed by the terminal device and an associated SSC mode, the network capability information is used for indicating whether the network supports SSC mode 3 of the Non-IP session, and the AF policy comprises at least one application identifier and an associated SSC mode;

the terminal device determines a requested SSC pattern, including:

the terminal device determines a requested SSC pattern based on an application identification, a session type of a first PDU session, and the first SSC pattern restriction information.

The method of claim 3 or 4, wherein the requested SSC pattern is the only SSC pattern that satisfies the first SSC pattern restriction information.

The method of claim 1 or 2, wherein the terminal device determines the requested SSC pattern, comprising:

the terminal equipment takes an SSC mode provided by an application program as a requested SSC mode; alternatively, the first and second electrodes may be,

the terminal equipment obtains a requested SSC mode according to a default SSC mode selection policy rule.

The method according to any of claims 1 to 6, wherein after the terminal device sends the first request message to the first core network element, the method further comprises:

and the terminal equipment receives a first response message from the first core network element, wherein the first response message is used for indicating that the establishment of the first PDU session is refused.

The method of claim 7, wherein the first response message comprises cause information (cause code) for rejecting establishment of the first PDU session, wherein the cause information indicates at least one of: the terminal device does not support the requested SSC mode; the network does not support the requested SSC pattern; the data network DN does not support the requested SSC pattern; the subscription does not support the requested SSC pattern.

The method of claim 8, wherein after the terminal device receives the first response message from the first core network element, the method further comprises:

if the cause information indicates that the terminal device does not support the requested SSC pattern and/or the subscription does not support the requested SSC pattern, the terminal device determines the requested SSC pattern as an SSC pattern that is not associated with a session type of the first PDU session;

if the reason information is used for indicating that the network does not support the requested SSC mode, the terminal equipment determines the requested SSC mode as an SSC mode which is not associated with the session type of the first PDU session when the accessed Public Land Mobile Network (PLMN) is not changed;

if the reason information is used for indicating that the DN does not support the requested SSC mode, the terminal equipment determines the requested SSC mode as the SSC mode which is not associated with the session type of the first PDU session when the data network name DNN is not changed.

The method of any of claims 7-9, wherein the first response message further comprises an SSC pattern allowed for the first PDU session.

The method of claim 10, wherein after the terminal device receives the first response message from the first core network element, the method further comprises:

and the terminal equipment sends a fourth request message to the first core network element according to the first response message, wherein the fourth request message is used for requesting to establish the first PDU session, and the fourth request message comprises an SSC mode allowed by the first PDU session.

A method of determining an SSC pattern, the method comprising:

a first core network element receives a first request message from a terminal device, wherein the first request message is used for requesting to establish a first PDU session, and the first request message comprises a session type of the first PDU session and a requested SSC mode;

and the first core network element returns a first response message to the terminal equipment.

The method of claim 12, wherein the first request message further comprises first indication information indicating that a requested SSC pattern is not allowed to be modified.

The method according to claim 12 or 13, wherein the first response message is used to indicate a rejection of establishing the first PDU session.

The method of claim 14, wherein before the first core network element returns the first response message to the terminal device, the method further comprises:

the first core network element acquires judgment information, wherein the judgment information comprises one or more of subscription information, network capability information, DN authentication information and capability information of the terminal equipment; the subscription information is used for indicating the session type and the associated SSC mode of the PDU session allowed by the terminal equipment, the network capability information is used for indicating whether the network supports SSC mode 3 of the Non-IP session, the capability information of the terminal equipment is used for indicating whether the terminal equipment supports SSC mode 3 of the Non-IP session, and the DN authentication information is used for indicating the session type and the associated SSC mode of the PDU session supported by the DN;

and the first core network element determines that the SSC mode which does not support the request is not supported according to the judgment information.

The method of claim 15, wherein the first response message comprises reason information for rejecting establishment of the first PDU session.

The method of claim 16, wherein:

if the first core network element determines that the SSC mode does not support the request according to the subscription information of the terminal equipment, the reason information indicates that the SSC mode does not support the request by subscription;

if the first core network element determines that the requested SSC mode is not supported according to the network capability information, the reason information indicates that the network does not support the requested SSC mode;

if the first core network element determines that the requested SSC mode is not supported according to the DN authentication information, the reason information indicates that the DN does not support the requested SSC mode;

if the first core network element determines that the requested SSC mode is not supported according to the capability information of the terminal device, the reason information indicates that the terminal device does not support the requested SSC mode.

The method of any of claims 14-17, wherein the first response message further comprises an SSC pattern allowed for the first PDU session.

The method of claim 14, wherein the first core network element is an AMF network element or an SMF network element, and before the first core network element returns the first response message to the terminal device, the method further comprises:

the first core network element acquires first SSC mode restriction information, wherein the first SSC mode restriction information is determined by one or more of subscription information of the terminal equipment, network capacity information and capacity information of the terminal equipment; the subscription information is used for indicating the session type and the associated SSC mode of the PDU session allowed by the terminal equipment, the network capability information is used for indicating whether the network supports SSC mode 3 of the Non-IP session, and the capability information of the terminal equipment is used for indicating whether the terminal equipment supports SSC mode 3 of the Non-IP session;

and the first core network element determines that the SSC mode which does not support the request is not supported according to the first SSC mode restriction information.

A terminal device, characterized in that the terminal device comprises:

a processing module for determining a requested SSC pattern;

a transceiver module, configured to send a first request message to a first core network element, where the first request message is used to request establishment of a first PDU session, and the first request message includes a session type of the first PDU session and a requested SSC mode.

The method of claim 20, wherein the first request message further comprises first indication information indicating that a requested SSC pattern is not allowed to be modified.

The terminal device of claim 21, wherein prior to the processing module determining the requested SSC pattern, the transceiver module is further configured to:

sending capability information of the terminal equipment to a second core network element, wherein the capability information of the terminal equipment is used for indicating whether the terminal equipment supports SSC mode 3 of Non-IP conversation;

receiving first SSC mode restriction information from the second core network element, wherein the first SSC mode restriction information is determined by one or more of capability information of the terminal equipment, subscription information of the terminal equipment and network capability information, the subscription information is used for indicating a session type and an associated SSC mode of a PDU session allowed by the terminal equipment, and the network capability information is used for indicating whether a network supports SSC mode 3 of a Non-IP session;

the processing module is specifically configured to:

determining a requested SSC pattern based on a session type of a first PDU session and the first SSC pattern restriction information.

The terminal device of claim 21, wherein the transceiver module is further configured to:

receiving first SSC mode restriction information from a third core network element, wherein the first SSC mode restriction information is determined by one or more of capability information of the terminal equipment, subscription information of the terminal equipment, network capability information and an AF policy, the capability information of the terminal equipment is used for indicating whether the terminal equipment supports SSC mode 3 of Non-IP session, the subscription information is used for indicating the session type of PDU session allowed by the terminal equipment and the associated SSC mode, the network capability information is used for indicating whether the network supports SSC mode 3 of Non-IP session, and the AF policy comprises at least one application identifier and the associated SSC mode;

the processing module is specifically configured to: determining the SSC pattern of the request based on an application identification, a session type of a first PDU session, and the first SSC pattern restriction information.

The terminal device of claim 22 or 23, wherein the requested SSC pattern is the only SSC pattern that satisfies the first SSC pattern restriction information.

The terminal device according to claim 20 or 21, wherein the processing module is specifically configured to:

taking an SSC pattern provided by an application program as a requested SSC pattern; alternatively, the first and second electrodes may be,

the requested SSC mode is obtained according to a default SSC mode selection policy rule.

The terminal device according to any of claims 20 to 25, wherein after the transceiver module sends the first request message to the first core network element, the transceiver module is further configured to:

receiving a first response message from the first core network element, where the first response message is used to indicate that the establishment of the first PDU session is rejected.

The terminal device according to claim 26, wherein the first response message comprises cause information (cause code) for rejecting establishment of the first PDU session, the cause information indicating at least one of: the terminal device does not support the requested SSC mode; the network does not support the requested SSC pattern; the data network DN does not support the requested SSC pattern; the subscription does not support the requested SSC pattern.

The terminal device of claim 27, wherein the first response message further includes an SSC pattern allowed for the first PDU session.

The terminal device of claim 28, wherein the transceiver module is further configured to:

and sending a fourth request message to the first core network element according to the first response message, wherein the fourth request message is used for requesting to establish the first PDU session and comprises the SSC mode allowed by the first PDU session.

The terminal device of claim 27, wherein the processing module is further configured to:

determining the requested SSC pattern as an SSC pattern not associated with a session type of the first PDU session if the cause information indicates that the terminal device does not support the requested SSC pattern and/or the subscription does not support the requested SSC pattern;

determining the requested SSC mode as an SSC mode not associated with a session type of the first PDU session when no change occurs in an accessed Public Land Mobile Network (PLMN) if the reason information indicates that the network does not support the requested SSC mode;

if the reason information indicates that the DN does not support the requested SSC pattern, determining the requested SSC pattern as an SSC pattern not associated with the session type of the first PDU session when the data network name DNN is not changed.

A core network element, wherein the core network element comprises:

a receiving module, configured to receive a first request message from a terminal device, where the first request message is used to request establishment of a first PDU session, and the first request message includes a session type of the first PDU session and a requested SSC pattern;

and the sending module is used for returning the first response message to the terminal equipment.

The core network element of claim 31, wherein the first request message further comprises first indication information indicating that the requested SSC pattern is not allowed to be modified.

A core network element according to claim 31 or 32, wherein the first response message is adapted to indicate a rejection of establishing the first PDU session.

The core network element of claim 33, wherein the core network element further comprises a processing module configured to:

acquiring judgment information, wherein the judgment information comprises one or more items of subscription information, network capacity information, DN authentication information and capacity information of the terminal equipment; the subscription information is used for indicating the session type and the associated SSC mode of the PDU session allowed by the terminal equipment, the network capability information is used for indicating whether the network supports SSC mode 3 of the Non-IP session, the capability information of the terminal equipment is used for indicating whether the terminal equipment supports SSC mode 3 of the Non-IP session, and the DN authentication information is used for indicating the session type and the associated SSC mode of the PDU session supported by the DN;

and determining that the requested SSC mode is not supported according to the judgment information.

The core network element of claim 34, wherein the first response message includes cause information for rejecting establishment of the first PDU session.

The network element of claim 35, wherein:

if the processing module determines that the SSC mode does not support the request according to the subscription information of the terminal equipment, the reason information indicates that the SSC mode does not support the request;

if the processing module determines that the requested SSC mode is not supported according to the network capability information, the reason information indicates that the network does not support the requested SSC mode;

if the processing module determines that the requested SSC mode is not supported according to the DN authentication information, the reason information indicates that the DN does not support the requested SSC mode;

if the processing module determines that the requested SSC mode is not supported according to the capability information of the terminal device, the reason information indicates that the terminal device does not support the requested SSC mode.

The core network element of claim 35, wherein the first response message further comprises an SSC pattern allowed for the first PDU session.

The core network element of claim 33, wherein the first core network element is an AMF network element or an SMF network element, and the processing module is further configured to:

acquiring first SSC mode restriction information, wherein the first SSC mode restriction information is determined by one or more of subscription information of the terminal equipment, network capacity information and capacity information of the terminal equipment;

determining that the requested SSC pattern is not supported according to the first SSC pattern restriction information.

A communication device comprising a memory and a processor coupled to the memory;

the memory has stored therein program instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-11.

The apparatus of claim 39, wherein the apparatus comprises a terminal device or a chip within the terminal device.

A communication device comprising a memory and a processor coupled to the memory;

the memory has stored therein program instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 12-19.

A computer storage medium having instructions stored therein, which when executed on a computer, cause the computer to perform the method of any one of claims 1-11.

A computer storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the method of any one of claims 12-19.

A system for determining an SSC pattern, said system comprising a terminal device and a first core network element;

the terminal equipment is used for determining the SSC mode of the request; sending a first request message to the first core network element, where the first request message is used to request establishment of a first PDU session, and the first request message includes a session type of the first PDU session and the requested SSC mode; receiving a first response message sent by a first core network element, wherein the first response message is used for indicating that the establishment of the first PDU session is refused;

the first core network element is configured to receive a first request message from the terminal device; determining that the requested SSC mode is not supported according to subscription data of the terminal and a session type of the first PDU session; and sending the first response message to the terminal equipment.

The system of claim 44, wherein the terminal device is further configured to use an SSC pattern provided by an application as the requested SSC pattern; alternatively, the requested SSC pattern is derived according to default SSC pattern selection rules.

The system according to claim 44 or 45, wherein said first response message further comprises reason information for rejecting establishment of said first PDU session.

The system of any of claims 44-46 wherein the first response message further includes an SSC pattern allowed for the first PDU session.

The system of any of claims 44-46 wherein said terminal device is further configured to re-request establishment of said first PDU session based on an SSC pattern allowed for said first PDU session.