US 12,074,797 B2
Method and apparatus for assigning network address prefix
Wen Zhang, Shanghai (CN); Yong Yang, Kållered (SE); and Yingjiao He, Shanghai (CN)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/034,796
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Sep. 27, 2021, PCT No. PCT/CN2021/121059
§ 371(c)(1), (2) Date May 1, 2023,
PCT Pub. No. WO2022/095630, PCT Pub. Date May 12, 2022.
Claims priority of application No. PCT/CN2020/126610 (WO), filed on Nov. 4, 2020.
Prior Publication US 2023/0412506 A1, Dec. 21, 2023
Int. Cl. H04L 45/42 (2022.01); H04L 45/748 (2022.01)
CPC H04L 45/748 (2013.01) [H04L 45/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a control plane function, comprising:
receiving, from a terminal device, a request for assigning a network address prefix;
determining whether the network address prefix is to be assigned by the control plane function or a user plane function;
transmitting, to the user plane function, a Packet Forwarding Control Protocol, PFCP, Session Modification Request for requesting the user plane function to assign the network address prefix, if it is determined that the network address prefix is to be assigned by the user plane function;
receiving, from the user plane function, a PFCP Session Modification Response including an assigned network address prefix; and
transmitting the assigned network address prefix to the terminal device,
wherein the PFCP Session Modification Request includes a first parameter indicating that the user plane function is delegated to assign the network address prefix, and wherein the PFCP Session Modification Response includes a second parameter indicating assigned network address prefix by the user plane function;
wherein the PFCP Session Modification Request includes a field for IPv6 Prefix Delegation Bits and/or a field for IPv6 Prefix Length;
wherein the field for IPv6 Prefix Delegation Bits and/or the field for IPv6 Prefix Length indicates a length of the network address prefix, or the field for IPv6 Prefix Delegation Bits and/or the field for IPv6 Prefix Length is set to zero to indicate that the user plane function determines the length of the network address prefix based on a local configuration.