Bearer mapping in a wireless communications network
A method of bearer mapping is provided in a wireless communications network, the wireless communications network comprising a plurality of nodes which support integrated wireless access and backhaul between a core network and user equipment. The method comprises at at least some of the nodes of the network preconfiguring the node with a bearer mapping policy by modifying a protocol layer of the node to define a plurality of sets of permitted values of communication identifiers and associate each set of values of the communication identifiers with a logical channel identifier and at least one quality of service parameter, and receiving at least one signal at the node comprising a plurality of protocol data units, and for each protocol data unit, determining the set of values of the communication identifiers from the protocol data unit, applying the bearer mapping policy to determine the logical channel identifier and the at least one quality of service parameter associated with the set of values of the communication identifiers of the protocol data unit and mapping the protocol data unit to a logical channel having the logical channel identifier and applying the at least one quality of service parameter to the logical channel FIG. 6 to be published with the abstract.
1. A method of bearer mapping in a wireless communications network, the wireless communications network comprising a plurality of nodes which support integrated wireless access and backhaul between a core network and user equipment, the method comprising at least one of the nodes of the network:
preconfiguring the node with a bearer mapping policy by modifying a protocol layer of the node to define a plurality of sets of permitted values of communication identifiers and associate each set of values of the communication identifiers with a logical channel identifier and at least one quality of service (QoS) parameter for Third Generation Partnership Project (3GPP) New Radio (NR), wherein the QoS parameter comprises any of a Prioritized Bit Rate parameter or a Bucket Size Duration parameter, and
receiving at least one signal at the node comprising a plurality of protocol data units,
applying the bearer mapping policy to determine the logical channel identifier and the at least one quality of service parameter associated with one of the protocol data units and
mapping one of the protocol data units to a logical channel having the logical channel identifier and applying the at least one quality of service parameter to the logical channel; wherein
the communication identifiers comprise a communication type identifier signifying a control data communication or a user data communication, a protocol identifier signifying a protocol of the communication, and a General Packet Radio Service Tunneling protocol (GTP) tunnel identifier signifying a tunnel endpoint in a receiving GTP protocol entity.
2. The method according to claim 1 wherein preconfiguring the node is controlled by a donor node of the network.
3. The method according to claim 1 wherein modifying the protocol layer of the node comprises modifying a Radio Link Control (RLC) adaptation layer of the node.
4. The method according to claim 1 , wherein the communication identifiers are aggregated to reduce overhead.
5. The method according to claim 1 , wherein determining the set of values of the communication identifiers from the protocol data unit comprises reading the set of values of the communication identifiers from a header of the protocol data unit.
6. An integrated access and backhaul (IAB) node configured to perform the method of claim 1 .
7. The IAB node according to claim 6 comprising any of an interim IAB node, an access IAB node.
8. The IAB donor node configured to perform the method of claim 1 .