Wireless device and method of transmitting uplink data and buffer status reports in a wireless communications system

Patent metadata

Field	Value
Publication number	US-9549353-B2
Application number	US-201414525629-A
Country	US
Kind code	B2
Filing date	Oct 28, 2014
Priority date	Aug 12, 2007
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

The method provides buffer status reporting for the transmission of uplink data from a wireless device to a base station. Uncompressed data is stored in a first buffer of the wireless device. A buffer status report is transmitted from the wireless device to the base station, where the buffer status report contains information indicating an amount of the uncompressed data to be transmitted from the wireless device. The information is dependent on the amount of the uncompressed data stored in the first buffer.

First claim

What is claimed is:

1. A method for communicating with a base station, the method performed by a user equipment (UE) and comprising:
calculating, by the UE, an amount of first data stored in uplink buffers; and
transmitting, by the UE, a buffer status report based on information on the calculated amount of first data to the base station,
wherein the first data stored in the uplink buffers comprises at least one packet data convergence protocol (PDCP) service data unit (SDU) and at least one PDCP protocol data unit (PDU), and
wherein the at least one PDCP SDU has not been compressed and the at least one PDCP PDU has been compressed using a robust header compression (ROHC) scheme.

2. The method of claim 1 , wherein the at least one PDCP PDU has been compressed depending on feedback information received from the base station.

3. The method of claim 1 , further comprising:
transmitting the at least one PDCP PDU to the base station.

4. The method of claim 1 , further comprising:
transmitting an additional buffer status report to the base station, the additional buffer status report comprising an estimation of a compression factor, and wherein the transmitting of the additional buffer status report is at a lower frequency than the transmitting of the buffer status report based on the information on the calculated amount of first data.

5. The method of claim 1 , wherein the uplink buffers comprises a PDCP buffer.

6. The method of claim 5 , wherein the uplink buffers further comprises a radio link control (RLC) buffer.

7. The method of claim 6 , wherein the buffer status report is further based on information on an amount of second data depending on a size of additional headers added for transmission of data read from the RLC buffer.

8. The method of claim 1 , wherein the buffer status report is transmitted as a part of a medium access control (MAC) procedure.

9. The method of claim 1 , wherein the buffer status report is transmitted as a part of a radio resource control (RRC) procedure.

Assignees

• Lg Electronics Inc

Inventors

• Fischer Patrick

Classifications

• H04L69/04 Primary

  Protocols for data compression, e.g. ROHC · CPC title

• H04W36/0094 Primary

  Definition of hand-off measurement parameters · CPC title

• H04W28/0278

  using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12) · CPC title

• H04L47/38

  by adapting coding or compression rate · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title