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Handling cell reselections and state transitions for high-speed downlink packet access

A cell reselection and downlink technology, applied in the field of wireless communication, can solve the problem that HSDPA resources are not cleared, etc.

Active Publication Date: 2013-03-27
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a WTRU may reselect from a cell that supports HS-DSCH in a cell to a cell that does not support the Enhanced Cell_FACH feature and HSDPA resources are not cleared

Method used

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  • Handling cell reselections and state transitions for high-speed downlink packet access
  • Handling cell reselections and state transitions for high-speed downlink packet access
  • Handling cell reselections and state transitions for high-speed downlink packet access

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Experimental program
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Embodiment

[0223] CLAIMS 1. A Wireless Transmit Receive Unit (WTRU) configured to operate in a High Speed ​​Data Packet Access (HSDPA) mode in a cell or state and to clear HSDPA resources when moving out of the cell or state.

[0224] 2. The WTRU of embodiment 1 wherein the WTRU is configured to clear HSDPA resources when a condition to perform high speed downlink shared channel reception is not met.

[0225] 3. The WTRU as in any one of the preceding embodiments, wherein the WTRU is further configured to perform one or more of the following procedures to clear HSDPA resources when leaving a cell or state:

[0226] Stop receiving High Speed ​​Synchronous Control Channel (HS-SCCH);

[0227] stop high-speed downlink shared channel (HS-DSCH) reception;

[0228] Clear Radio Network Temporary Identifier (RNTI);

[0229] Reset Media Access Control (MAC) entities;

[0230] Release Hybrid Automatic Answer Request (HARQ) resources; and

[0231] Clear any stored information elements related to...

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Abstract

A wireless transmit receive unit (WTRU) is configured to operate in an high speed data packet access (HSDPA) mode in a cell and / or state and to clear HSDPA resources when moving out of the cell and / or state. The WTRU is configured to clear HSDPA resources when conditions to perform high speed downlink shared channel reception are not met (i.e. HS-DSCH reception not supported).

Description

technical field [0001] This application relates to wireless communications. Background technique [0002] A Wireless Transmit Receive Unit (WTRU) in the UMTS Terrestrial Radio Access Network (UTRAN) can be in either of two modes: idle or connected. Based on the WTRU's mobility and activity while in connected mode, the UTRAN can direct the WTRU to transition between a number of sub-states: Cell_PCH, URA_PCH, Cell_DCH and Cell_FACH. The Cell-PCH and URA_PCH states are used to trigger cell updates on the Mobile WTRU's Paging Channel (PCH). The Cell_DCH state is characterized by a dedicated channel (DCH) in both uplink and downlink. On the WTRU side, this corresponds to continuous transmission and reception and can make demands on user energy requirements. The Cell_FACH state is characterized by a Forward Access Channel (FACH) and does not use a dedicated channel, thus allowing better energy consumption at the expense of lower uplink and downlink throughput. [0003] Recent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/08H04W76/06
CPCH04W36/0055H04W76/027H04W76/046H04W36/0016H04W76/18H04W76/27H04W52/0216H04W36/0072H04W36/08H04W76/30Y02D30/70H04W36/06H04W36/0061
Inventor D·帕尼R·迪吉罗拉墨P·马里内尔C·R·凯夫
Owner INTERDIGITAL TECH CORP