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Random access method based on e-dch transmission channel in td-scdma system

A TD-SCDMA, E-DCH technology, applied in the field of random access, can solve the problems of collision, data interruption, failure, etc., and achieve the effect of avoiding signaling interaction, saving time delay, and saving resource overhead

Inactive Publication Date: 2011-11-30
王芳伟
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AI Technical Summary

Problems solved by technology

In the CELL_FACH state, interactive and background packet services are generally performed, and data is prone to interruption, so UE will frequently initiate E-RUCCH access, and E-RUCCH occupies system random access resources. Collision is prone to occur, resulting in failure; even if E-RUCCH can be sent successfully at one time, it will bring a lot of delay to UE

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  • Random access method based on e-dch transmission channel in td-scdma system
  • Random access method based on e-dch transmission channel in td-scdma system
  • Random access method based on e-dch transmission channel in td-scdma system

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Embodiment Construction

[0042] For the service characteristics of CELL_FACH state, the present invention provides a kind of random access method based on E-DCH transmission channel under CELL_FACH state in TD-SCDMA system, comprises the following steps (see figure 2 ):

[0043] 201. The UE sends an uplink synchronization code through the UpPCH channel; wherein: the uplink synchronization code is a dedicated synchronization code for uplink access in the enhanced CELL_FACH state, or the UpPCH subchannel where the UpPCH channel is sent is the uplink access in the enhanced CELL_FACH state The dedicated UpPCH sub-channel, or the combination of the uplink synchronization code and the UpPCH sub-channel is dedicated for uplink access in the enhanced CELL_FACH state;

[0044] 202. After the Node B detects the uplink synchronization code of the UE, if it determines that it is an uplink access in the enhanced CELL_FACH state, it returns an acknowledgment on the FPACH channel, which carries E-DCH resource infor...

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Abstract

The present invention provides a random access method based on E-DCH in CELL FACH state in TD-SCDMA system, comprising the following steps: 1, UE sends uplink synchronization code through UpPCH channel; wherein: said uplink synchronization code is enhanced The dedicated synchronization code for uplink access in the CELL FACH state, or the subchannel where the UpPCH channel is located is an UpPCH subchannel dedicated for uplink access in the enhanced CELL FACH state, or the combination of the uplink synchronization code and the UpPCH subchannel is enhanced Dedicated to uplink access in the CELL FACH state; 2. After the Node B detects the UE's uplink synchronization code, if it is judged to be an uplink access in the enhanced CELL FACH state, it will return an acknowledgment on the fast physical access channel FPACH, which carries E- DCH resource information; 3. The UE sends data on the authorized E-DCH resource.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a random access method based on an E-DCH transmission channel in a CELL_FACH state in a TD-SCDMA system. Background technique [0002] 3GPP (3rd Generation Partnership Project, third generation mobile communication partnership organization) is currently working on the standardization of CELL_FACH (Cell_Forward Access Channel) state uplink enhancement. CELL_FACH uplink enhancement introduces E-DCH (enhanced-dedicated transport channel) transport channel in CELL_FACH state to enhance the uplink packet data transmission performance in this state, so that it can obtain smaller packet transmission delay and higher transmission rate. [0003] E-DCH transmission is commonly referred to as HSUPA (High Speed ​​Uplink Packet Access, High Speed ​​Uplink Packet Access). HSUPA uses advanced physical layer technology to obtain high transmission efficiency. In versions before 3GPP Rel-7, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W76/02H04B7/26
Inventor 陈慧李群
Owner 王芳伟
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