Method for retaining uplink synchronization

A technology of HS-SCCH and timer, applied in the direction of synchronization device, communication between multiple stations, electrical components, etc., can solve the problem of canceling DPCH accompanying channel, etc., and achieve the effect of avoiding physical channel resources and maintaining uplink synchronization

Inactive Publication Date: 2010-05-12
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

[0011] At present, the HSPA+ protocol is clear: UE needs to maintain and maintain uplink synchronization in the CELL_DCH state, but cancels the DPCH accompanying channel

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  • Method for retaining uplink synchronization

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0029] In order to avoid occupying traffic channel resources and modifying existing protocols, the present invention proposes a method for maintaining uplink synchronization. The main idea of ​​the method is: when the UE is in the CELL_DCH state and does not perform any uplink and downlink data transfer for a period of time When sending and receiving, the HS-SICH uploaded by the UE is detected as a reference signal, and the SS command is carried through the HS-SCCH to perform "air-conditioning", so as to realize uplink synchronization maintenance in the CELL_DCH state.

[0030] figure 1 It is a schematic diagram of the implementation flow of the method for maintaining uplink synchronization in the present invention. see figure 1 , the implementation p...

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Abstract

The invention discloses a method for retaining uplink synchronization. The method includes the following steps: maintaining an uplink synchronization retaining timer for each UE in CELL_DCH state; when the uplink synchronization retaining timer of the UE is overtime, sending an authorization command to the UE through a high-speed shared control channel (HS-SCCH); and taking the feedback sent by the UE through the high-speed shared information channel (HS-SICH) as an uplink reference signal, conducting uplink synchronization calculation on the UE, and sending an uplink synchronization adjusting signaling to the UE through the HS-SCCH according to the calculation result. The adoption of the method can retain the uplink synchronization of the UE, does not need to occupy any business resources and does not need to do any modification on the control frame format and the time sequence relationship of the existing protocol.

Description

technical field [0001] The invention relates to HSPA+ (High Speed ​​Packet Access Evolution) technology, in particular to a method for maintaining uplink synchronization. Background technique [0002] There are three technical solutions for uplink synchronization maintenance in the existing time division synchronous code division multiple access (TD-SCDMA) system from the R4 version to the HSUPA (High Speed ​​Uplink Packet Access) version, which are described in detail below: [0003] The first uplink synchronization maintenance scheme: the base station (NodeB) specially configures a downlink DPCH (Dedicated Physical Channel) for a certain user, and uses the DPCH channel to send an uplink synchronization adjustment command. [0004] The second scheme for maintaining uplink synchronization: when the user needs to send and receive business data, use the control channel to send an uplink synchronization adjustment command. For example: for scheduling services in the HSUPA syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04B7/26
Inventor 朱颖
Owner POTEVIO INFORMATION TECH CO LTD
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