AT commands for 5G session management
A method of defining ATtention (AT) commands for 5G session management operations is proposed. In one example, the AT command can be a set command for configuring a PDU session establishment procedure. Additional 5G parameters including PDU session ID, Single-Network Slice Selection Assistance Information (S-NSSAI), Service and Session Continuity (SSC) mode, access type, and Reflective QoS (RQ) indication are defined for AT command +CGDCONT to configure the PDU session. In another example, the AT command can be a read command for querying PDU session and QoS flow parameters. Additional 5G parameters including PDU session ID (PSI), QoS flow ID (QFI), S-NASSI, SSC mode, access type, and RQ timer are defined for AT command +CGCONTRDP or +CGSCONTRDP.
1. A method, comprising:
generating an Attention (AT) command by an Application Processor (AP) of a User Equipment (UE) in a wireless network, wherein the AT command comprises a context ID (CID);
providing the AT command by the AP to a modem of the UE via an AT command interface, wherein the AT command comprises PDU session configuration information;
transmitting a PDU session establishment request from the modem to the network, wherein the request comprises PDU session parameters based on the PDU session configuration information provided by the AT command; and
receiving a PDU session establishment accept from the network in response to the request.
2. The method of claim 1 , wherein the AT command is a set command +CGDCONT for configuring the PDU session parameters.
3. The method of claim 2 , wherein the AP provides a second AT command +CGACT to trigger the PDU session establishment request transmission by the modem.
4. The method of claim 1 , wherein the AT command further comprises Single-Network Slice Selection Assistance information (S-NSSAI).
5. The method of claim 1 , wherein the AT command further comprises a Session and Service Continuity (SSC) mode.
6. The method of claim 1 , wherein the AT command further comprises a Reflective QoS indication.
7. The method of claim 1 , wherein the AT command further comprises an access type indicating 3GPP access or non-3GPP access.
8. A User Equipment (UE), comprising:
an Application Processor (AP) that generates an Attention (AT) command in a wireless network, wherein the AT command comprises a context ID (CID);
a mobile terminal (MT) that receives the AT command via an AT command interface, wherein the AT command comprises PDU session configuration information;
a transmitter that transmits a PDU session establishment request from the modem to the network, wherein the request comprises PDU session parameters based on the PDU session configuration information provided by the AT command; and
a receiver that receives a PDU session establishment accept from the network in response to the request.
9. The UE of claim 8 , wherein the AT command is a set command +CGDCONT for configuring the PDU session parameters.
10. The UE of claim 9 , wherein the AP provides a second AT command +CGACT to trigger the PDU session establishment request transmission by the modem.
11. The UE of claim 8 , wherein the AT command further comprises Single-Network Slice Selection Assistance information (S-NSSAI).
12. The UE of claim 8 , wherein the AT command further comprises a Session and Service Continuity (SSC) mode.
13. The UE of claim 8 , wherein the AT command further comprises a Reflective QoS indication.
14. The UE of claim 8 , wherein the AT command further comprises an access type indicating 3GPP access or non-3GPP access.
15. A method comprising:
establishing a protocol data unit (PDU) session by a user equipment (UE) in a wireless network, wherein the PDU session is configured with one or more QoS flows;
transmitting an Attention (AT) command from an Application Processor (AP) of the UE to a modem of the UE, wherein the AT command is a read command for querying the parameters of a QoS flow or the PDU session, wherein the AT command comprises a context ID (CID) of the queried QoS flow; and
receiving a response from the modem, wherein the response comprises the parameters of the queried QoS flow or the queried PDU session.
16. The method of claim 15 , wherein each of the multiple QoS flow contains or more QoS rules, and wherein only one QoS flow contains a default QoS rule.
17. The method of claim 16 , wherein the queried QoS flow contains the default QoS rule, and wherein the AT command is AT +CGCONTRDP.
18. The method of claim 17 , wherein the response comprises QoS parameters applicable to other QoS flows of the PDU session including Single-Network Slice Selection Assistance information (S-NSSAI), a Session and Service Continuity (SSC) mode, an access type, and a reflective QoS timer.
19. The method of claim 16 , wherein the queried QoS flow does not contain the default QoS rule, and wherein the AT command is +CGSCONTRDP.
20. The method of claim 19 , wherein the response comprises QoS parameters applicable to the queried QoS flow only.