Apparatus and method for radio communication
To enable delivery confirmation for data transmitted from a base station to a terminal apparatus via the access point. An apparatus according to an example aspect of the present invention includes an information acquisition unit configured to acquire a data unit from a packet data convergence protocol (PDCP) layer of a base station, and a communication processing unit configured to transmit the data unit to a terminal apparatus via an access point of a wireless local area network using a protocol enabling delivery confirmation.
1. An apparatus comprising:
a memory storing instructions; and
one or more processors configured to execute the instructions to:
acquire a data unit from a Packet Data Convergence Protocol (PDCP) layer of a base station; and
transmit the data unit to a terminal apparatus via an access point of a wireless local area network, using a packet of a transport layer protocol enabling delivery confirmation; and
provide a result of delivery confirmation of the transport layer protocol to the PDCP layer of the base station;
wherein the delivery confirmation is performed based on a sequence number included in the packet; and
wherein the result is provided to the PDCP layer of the base station based on the sequence number included in the packet and correspondence relationship, managed by the apparatus, between the sequence number and a PDCP sequence number.
2. The apparatus according to claim 1 , wherein the result of delivery confirmation of the transport layer protocol includes information indicating that delivery of the data unit is acknowledged.
3. The apparatus according to claim 1 , wherein the result of delivery confirmation of the transport layer protocol includes information indicating that delivery of the data unit is not acknowledged.
4. The apparatus according to claim 1 , wherein the apparatus is a gateway different from the base station, or a module for the gateway.
5. The apparatus according to claim 1 , wherein the apparatus is the base station, a base station apparatus for the base station, or a module for the base station apparatus.
6. The apparatus according to claim 5 , wherein the one or more processors are configured to execute the instructions to:
perform transmission processing in the PDCP layer; and
advance a re-ordering window of the PDCP layer based on the result of delivery confirmation of the transport layer protocol.
7. The apparatus according to claim 5 , wherein the one or more processors are configured to execute the instructions to:
perform transmission processing in the PDCP layer; and
perform control of congestion between the base station and the terminal apparatus based on information from the transport layer protocol.
8. The apparatus according to claim 7 , wherein the control includes adjusting an amount of data directly transmitted from the base station to the terminal apparatus and an amount of data transmitted from the base station to the terminal apparatus via the access point.
9. An apparatus comprising:
a memory storing instructions; and
one or more processors configured to execute the instructions to:
acquire a data unit from a Packet Data Convergence Protocol (PDCP) layer of a base station, the data unit being transmitted to a terminal apparatus via an access point of a wireless local area network, using a packet of a transport layer protocol enabling delivery confirmation; and
perform reception processing of the data unit in the terminal apparatus; and
transmit a delivery confirmation of the transport layer protocol, the delivery confirmation being received from the terminal apparatus by the PDCP layer via the access point of a wireless local area network; and
wherein the delivery confirmation is performed based on a sequence number included in the packet; and
wherein the result is provided to the PDCP layer of the base station based on the sequence number included in the packet and correspondence relationship, managed by the gateway, between the sequence number and a PDCP sequence number.
10. The apparatus according to claim 9 , wherein the one or more processors are configured to execute the instructions to receive the data unit using the transport layer protocol.
11. The apparatus according to claim 9 , wherein the reception processing includes re-ordering in the PDCP layer.
12. The apparatus according to 9 , wherein the one or more processors are configured to execute the instructions to transmit, to the base station, a PDCP status report indicating that the data unit is received.
13. The apparatus according to claim 9 , wherein the apparatus is the terminal apparatus, or a module for the terminal apparatus.
14. The apparatus according to claim 9 , wherein the transport layer protocol is a Transmission Control Protocol (TCP) or a Stream Control Transmission Protocol (SCTP).
15. A method comprising:
acquiring a data unit from a Packet Data Convergence Protocol (PDCP) layer of a base station; and
transmitting the data unit to a terminal apparatus via an access point of a wireless local area network, using a packet of a transport layer protocol enabling delivery confirmation; and
providing a result of delivery confirmation of the transport layer protocol to the PDCP layer of the base station; and
wherein the delivery confirmation is performed based on a sequence number included in the packet; and
wherein the result is provided to the PDCP layer of the base station based on the sequence number included in the packet and correspondence relationship, managed by the gateway, between the sequence number and a PDCP sequence number.