# US 11,310,004 B2 · Master node transport network layer information exchange for downlink data forwarding of a secondary node terminated bearer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,004 B2 - Document ID: US11310004B2 - Status: Granted - Kind: B2 - Application number: 16/544,619 - Filed: 2019-08-19 - Published: 2020-02-20 - Granted: 2022-04-19 - Earliest claimed: 2018-08-20 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Karthika Paladugu; Xipeng Zhu; Gavin Bernard Horn; Luis Fernando Brisson Lopes - Web page: https://patentgrep.com/patent/US11310004B2 ## CPC - H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation} - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a master node (MN) may receive an acknowledgment message from a secondary node (SN). The MN and the SN may provide dual connectivity with a core network for a user equipment. The MN may provide an address indication message to the SN. The address indication message may include MN downlink transport network layer (TNL) information for an SN terminated data radio bearer (DRB) that requires master cell group (MCG) resources. The address indication message may be provided in a first message that immediately follows the acknowledgment message. In some aspects, the SN may receive the address indication message, and may forward, based at least in part on the MN downlink TNL information, downlink data for the SN terminated DRB that requires MCG resources. Numerous other aspects are provided. ## Claims ### Claim 1 A method of wireless communication performed by a master node (MN), comprising: receiving an acknowledgment message from a secondary node (SN), wherein the MN and the SN are to provide dual connectivity with a core network for a user equipment; and providing an address indication message to the SN based at least in part on receiving the acknowledgment message, wherein the address indication message is provided in a first message that immediately follows the acknowledgment message and that is before the MN provides a first radio resource control (RRC) reconfiguration message, wherein the address indication message includes MN downlink transport network layer (TNL) information for an SN terminated data radio bearer (DRB) that requires master cell group (MCG) resources, and wherein a message format of the first message is different when the address indication message is associated with an SN addition preparation procedure than when the address indication is associated with an MN initiated SN modification procedure. ### Claim 2 (depends on 1) The method of claim 1, wherein the acknowledgment message is received in association with the SN addition preparation procedure, or wherein the acknowledgment message is received in association with the MN initiated SN modification procedure. ### Claim 3 (depends on 1) The method of claim 1, wherein the MN provides the RRC reconfiguration message to the user equipment. ### Claim 4 (depends on 1) The method of claim 1, wherein the SN terminated DRB that requires MCG resources is an MCG bearer, or wherein the SN terminated DRB that requires MCG resources is a split bearer. ### Claim 5 (depends on 1) The method of claim 1, wherein the dual connectivity with the core network is associated with a New Radio (NR) radio access network and a long term evolution (LTE) radio access network. ### Claim 6 (depends on 5) The method of claim 5, wherein the MN is associated with the NR radio access network and the SN is associated with the LTE radio access network. ### Claim 7 (depends on 5) The method of claim 5, wherein the MN is associated with the LTE radio access network and the SN is associated with the NR radio access network. ### Claim 8 (depends on 1) The method of claim 1, wherein the dual connectivity with the core network is associated with a first New Radio (NR) radio access network and a second NR radio access network. ### Claim 9 A method of wireless communication performed by a secondary node (SN), comprising: receiving an address indication message from a master node (MN), wherein the SN and the MN are to provide dual connectivity with a core network for a user equipment, wherein the address indication message is received in a first message that immediately follows an acknowledgment message and that is before the MN provides a first radio resource control (RRC) reconfiguration message, wherein the address indication message includes MN downlink transport network layer (TNL) information for an SN terminated data radio bearer (DRB) that requires master cell group (MCG) resources, and wherein a message format of the first message is different when the address indication message is associated with an SN addition preparation procedure than when the address indication is associated with an MN initiated SN modification procedure; and forwarding, based at least in part on the MN downlink TNL information, downlink data for the SN terminated DRB that requires MCG resources. ### Claim 10 (depends on 9) The method of claim 9, wherein the address indication message is received in association with the SN addition preparation procedure. ### Claim 11 (depends on 9) The method of claim 9, wherein the address indication message is received in association with the MN initiated SN modification procedure. ### Claim 12 (depends on 9) The method of claim 9 wherein the address indication message is received before an SN reconfiguration complete message is received. ### Claim 13 (depends on 9) The method of claim 9, wherein the SN terminated DRB that requires MCG resources is an MCG bearer. ### Claim 14 (depends on 9) The method of claim 9, wherein the SN terminated DRB that requires MCG resources is a split bearer. ### Claim 15 (depends on 9) The method of claim 9, wherein the dual connectivity with the core network is associated with a New Radio (NR) radio access network and a long term evolution (LTE) radio access network. ### Claim 16 (depends on 15) The method of claim 15, wherein the MN is associated with the NR radio access network and the SN is associated with the LTE radio access network. ### Claim 17 (depends on 15) The method of claim 15, wherein the MN is associated with the LTE radio access network and the SN is associated with the NR radio access network. ### Claim 18 (depends on 9) The method of claim 9, wherein the dual connectivity with the core network is associated with a first New Radio (NR) radio access network and a second NR radio access network. ### Claim 19 (depends on 9) The method of claim 9, wherein the downlink data is received from the MN in association with a lossless data transfer. ### Claim 20 (depends on 9) The method of claim 9, wherein the downlink data is data received from the core network. ### Claim 21 A master node (MN) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receive an acknowledgment message from a secondary node (SN), wherein the MN and the SN are to provide dual connectivity with a core network for a user equipment; and provide an address indication message to the SN based at least in part on receiving the acknowledgment message, wherein the address indication message is provided in a first message that immediately follows the acknowledgment message and that is before the MN provides a first radio resource control (RRC) reconfiguration message, wherein the address indication message includes MN downlink transport network layer (TNL) information for an SN terminated data radio bearer (DRB) that requires master cell group (MCG) resources, and wherein a message format of the first message is different when the address indication message is associated with an SN addition preparation procedure than when the address indication is associated with an MN initiated SN modification procedure. ### Claim 22 A secondary node (SN) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receive an address indication message from a master node (MN), wherein the SN and the MN are to provide dual connectivity with a core network for a user equipment, wherein the address indication message is received in a first message that immediately follows an acknowledgment message and that before the MN provides a first radio resource control (RRC) reconfiguration message, wherein the address indication message includes MN downlink transport network layer (TNL) information for an SN terminated data radio bearer (DRB) that requires master cell group (MCG) resources, and wherein a message format of the first message is different when the address indication message is associated with an SN addition preparation procedure than when the address indication is associated with an MN initiated SN modification procedure; and forward, based at least in part on the MN downlink TNL information, downlink data for the SN terminated DRB that requires MCG resources. ### Claim 23 (depends on 21) The MN of claim 21, wherein the acknowledgment message is received in association with the SN addition preparation procedure, or wherein the acknowledgment message is received in association with the MN initiated SN modification procedure. ### Claim 24 (depends on 21) The MN of claim 21, wherein the MN provides the RRC reconfiguration message to the user equipment. ### Claim 25 (depends on 21) The MN of claim 21, wherein the SN terminated DRB that requires MCG resources is an MCG bearer, or wherein the SN terminated DRB that requires MCG resources is a split bearer. ### Claim 26 (depends on 21) The MN of claim 21, wherein the SN terminated DRB that requires MCG resources is an MCG bearer, or wherein the SN terminated DRB that requires MCG resources is a split bearer. ### Claim 27 (depends on 22) The SN of claim 22, wherein the acknowledgment message is received in association with the SN addition preparation procedure, or wherein the acknowledgment message is received in association with the MN initiated SN modification procedure. ### Claim 28 (depends on 22) The SN of claim 22, wherein the MN provides the RRC reconfiguration message to the user equipment. ### Claim 29 (depends on 22) The SN of claim 22, wherein the SN terminated DRB that requires MCG resources is an MCG bearer, or wherein the SN terminated DRB that requires MCG resources is a split bearer. ### Claim 30 (depends on 22) The SN of claim 22, wherein the SN terminated DRB that requires MCG resources is an MCG bearer, or wherein the SN terminated DRB that requires MCG resources is a split bearer.