System for efficient recovery of Node-B buffered data following MAC layer reset

Patent metadata

Field	Value
Publication number	US-9319946-B2
Application number	US-201414209564-A
Country	US
Kind code	B2
Filing date	Mar 13, 2014
Priority date	Sep 12, 2002
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A method and system for the UE and RNC to reduce transmission latency and potentially prevent loss of PDUs upon a MAC-hs layer reset. The RNC generates a radio resource control (RRC) message with a MAC-hs reset indication. The MAC reset indication requires the UE to flush buffers for configured HARQ processes, disassemble MAC protocol data units (PDUs) in the reordering buffers, deliver MAC-d PDUs to a MAC-d layer, and configure the MAC-hs to receive new data.

First claim

What is claimed is:

1. A method for use a radio network controller (RNC) comprising:
sending a message to a Node B providing information for a HS-DSCH cell change; and
sending a radio resource control (RRC) message, having an identifier indicating that a MAC-hs is to be reset, to a user equipment (UE) that triggers the HS-DSCH cell change,
wherein the MAC-hs reset requires the UE to flush MAC-hs packet data units (PDUs) stored in recording buffers for configured HARQ processes, deliver MAC-d PDUs to a MAC-d layer, and configure the MAC-hs to receive new data.

2. The method of claim 1 wherein the RRC message is associated with a high speed downlink shared channel (HS-DSCH) inter-Node B cell change.

3. A radio network controller (RNC) comprising:
a controller configured to send a message to a Node B providing information for a HS-DSCH cell change; and
the controller further configured to send a radio resource control (RRC) message, having an identifier indicating that a MAC-hs is to be reset, to a user equipment (UE) that triggers the HS-DSCH cell change,
wherein the MAC-hs reset requires the UE to flush MAC-hs packet data units (PDUs) stored in recording buffers for configured HARQ processes, deliver MAC-d PDUs to a MAC-d layer, and configure the MAC-hs to receive new data.

4. The RNC of claim 3 wherein the RRC message is associated with a high speed downlink shared channel (HS-DSCH) inter-Node B cell change.

5. A method for use by a user equipment (UE) comprising:
receiving a message from a Node B providing information for a HS-DSCH cell change;
receiving a radio resource control (RRC) message, having an identifier indicating that a MAC-hs is to be reset, from a radio network controller (RNC) that triggers the HS-DSCH cell change;
flushing MAC-hs packet data units (PDUs) stored in recording buffers for configured HARQ processes;
delivering MAC-d PDUs to a MAC-d layer; and
configuring the MAC-hs to receive new data.

6. The method of claim 5 wherein the RRC message is associated with a high speed downlink shared channel (HS-DSCH) inter-Node B cell change.

7. The method of claim 5 wherein the RRC message is associated with a high speed downlink shared channel (HS-DSCH) inter-Node B cell change.

8. A user equipment (UE) comprising:
a controller configured to receive a message from a Node B providing information for a HS-DSCH cell change; and
the controller further configured to receive a radio resource control (RRC) message, having an identifier indicating that a MAC-hs is to be reset, from a radio network controller (RNC) that triggers the HS-DSCH cell change;
the controller further configured to flush packet data units (PDU) stored in recording buffers for configured HARQ processes;
the controller further configured to deliver MAC-d PDUs to a MAC-d layer; and
the controller further configured to configure the MAC-hs to receive new data.

Assignees

• Interdigital Tech Corp

Inventors

• Terry Stephen E
• Chao Yi-Ju

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/50

  Constructional details · CPC title

• H04L47/70

  Admission control; Resource allocation · CPC title

• H04L49/90

  Buffering arrangements · CPC title