Base station device, terminal device, communication method, and communication system

Patent metadata

Field	Value
Publication number	US-11696175-B2
Application number	US-202017039028-A
Country	US
Kind code	B2
Filing date	Sep 30, 2020
Priority date	Apr 3, 2018
Publication date	Jul 4, 2023
Grant date	Jul 4, 2023

Abstract

A base station device includes, a transmitter that transmits first data of a first type and second data of a second type, and a controller that is able to omit, when the transmitter multiplexes the first data and the second data together and transmits the first data and the second data multiplexed together, at least a portion of a segmentation offset or at least a portion of a reserve bit included in an RLC header of the second data.

First claim

What is claimed is:

1. A base station device comprising:
a transmitter configured to transmit first data of a first type and second data of a second type; and
processor circuitry configured to omit, when the transmitter multiplexes and transmits the first data and the second data, at least a portion of a segmentation offset or at least a portion of a reserve bit included in a radio link control (RLC) header of the second data,
wherein omitting of at least the portion of the segmentation offset or at least the portion of the reserve bit includes:
when the transmitter multiplexes and transmits the first data and the second data,
omitting the portion of the segmentation offset without omitting a remaining portion of the segmentation offset; or
omitting at least the portion of the reserve bit included in the RLC header of the second data.

2. The base station device according to claim 1 , wherein the processor circuitry is further configured to omit, from the RLC header, the segmentation offset and add segmentation information indicating an order of segmentation of the second data.

3. The base station device according to claim 2 , wherein
the segmentation information has a plurality of bits, and
the processor circuitry is further configured to turn ON a bit of the plurality of bits, the bit of the plurality of bits being in accordance with the order of segmentation of the second data.

4. The base station device according to claim 1 , wherein, when the order of segmentation of the second data is placed at a starting position, the processor circuitry is further configured to omit the segmentation offset.

5. The base station device according to claim 1 , wherein, when the order of segmentation of the second data is placed at an ending position, the processor circuitry is further configured to omit the segmentation offset.

6. The base station device according to claim 1 , wherein, when the second data is not segmented, the processor circuitry is further configured to omit the segmentation offset.

7. The base station device according to claim 1 , wherein the processor circuitry is further configured to omit, when the transmitter multiplexes and transmits the first data and the second data, at least a portion of the segmentation offset and at least a portion of the reserve bit included in the RLC header of the second data.

8. The base station device according to claim 1 , wherein the processor circuitry is further configured to omit a portion of a region in which a sequence number of an RLC layer is stored.

9. The base station device according to claim 1 , wherein the processor circuitry is further configured to omit a portion of a region in which a sequence number of a packet data convergence protocol (PDCP) layer is embedded.

10. The base station device according to claim 1 , wherein, when not using the second data for control, the processor circuitry is further configured to omit an information element that is included in a PDCP header and that indicates whether the second data is for a control plane or for a user plane.

11. The base station device according to claim 1 , wherein the processor circuitry is further configured to concatenate the RLC header and a PDCP header and omit a portion of a sequence number of a header that is concatenated.

12. The base station device according to claim 11 , wherein, when not using the second data for control, the processor circuitry is further configured to omit an information element that is included in the header and that indicates whether the second data is for a control plane or for a user plane.

13. The base station device according to claim 1 , wherein the second data has a fixed length.

14. The base station device according to claim 13 , wherein the second type includes ultra-reliable and low latency communication (URLLC), and/or
wherein the first type includes enhanced mobile broadband (eMBB).

15. The base station device according to claim 1 , wherein the second data has a data size less than that of the first data.

16. The base station device according to claim 1 , wherein the processor circuitry is further configured to notify a device, which is a destination of transmission of the second data, of information relating to a format of the RLC header to be used to transmit the second data.

17. A terminal device comprising:
a receiver configured to receive first data of a first type and second data of a second type; and
processor circuitry configured to retrieve, as the second data, data included in a region of the first data and having an RLC header with:
a portion of a segmentation offset being omitted without a reaming in portion of the segmentation offset being omitted; or
at least a portion of a reserve bit being omitted

when the receiver receives the first data and the second data multiplexed.

18. A communication method comprising:
transmitting first data of a first type and second data of a second type; and
omitting, when the first data and the second data are multiplexed in the transmission, at least a portion of a segmentation offset or at least a portion of a reserve bit included in an RLC header of the second data,
wherein omitting of at least the portion of the segmentation offset or at least the portion of the reserve bit includes:
when the first data and the second data are multiplexed in the transmission,
omitting the portion of the segmentation offset without omitting a remaining portion of the segmentation offset; or
omitting at least the portion of the reserve bit included in the RLC header of the second data.

19. A communication system comprising:
a base station device including a transmitter that transmits first data of a first type and second data of a second type, and first processor circuitry that is configured to omit, when the transmitter multiplexes and transmits the first data and the second data, at least a portion of a segmentation offset or at least a portion of a reserve bit included in an RLC header of the second data,
wherein omitting of at least the portion of the segmentation offset or at least the portion of the reserve bit includes:
when the transmitter multiplexes and transmits the first data and the second data,
omitting the portion of the segmentation offset without omitting a remaining portion of the segmentation offset; or
omitting at least the portion of the reserve bit included in the RLC header of the second data; and

a terminal device including a receiver that receives the first data and the second data, and second processor circuitry that is configured to retrieve, as the second data, data included in a region of the first data and having the RLC header when the receiver receives the first data and the second data multiplexed.

Assignees

• Fujitsu Ltd

Inventors

• Ohta Yoshiaki
• Ode Takayoshi
• Kawasaki Yoshihiro

Classifications

• H04W80/02

  Data link layer protocols · CPC title

• H04W28/06 Primary

  Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} · CPC title

• H04L69/22

  Parsing or analysis of headers · CPC title

• H04L1/008

  where the control data relates to payload of a different packet · CPC title

• H04L1/0079 Primary

  Formats for control data (H04L1/16 takes precedence; training sequences H04L25/00 and H04L27/00) · CPC title