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Uplink access method, device and system based on competition

A technology of contention access and access methods, applied in devices and systems, and in the field of contention-based uplink access methods, can solve problems when uplink channel estimation cannot be completed, multiple user data packets cannot be detected at the same time, and data packet transmission is increased Delay and other issues to achieve the effect of reducing complexity, improving performance, and reducing transmission delay

Inactive Publication Date: 2012-10-24
NTT DOCOMO INC
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Problems solved by technology

Since the uplink data packets that collide all use the same uplink reference signal, the base station cannot complete the estimation of the uplink channels of different UEs, so it cannot detect multiple user data packets at the same time
At this time, these UEs need to retransmit the collided data packets, which will greatly increase the transmission delay of the data packets

Method used

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  • Uplink access method, device and system based on competition
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  • Uplink access method, device and system based on competition

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Embodiment Construction

[0043] 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.

[0044] In order to solve the problem of possible collision of uplink data packets of multiple UEs during the uplink access process, the embodiment of the present invention provides a contention-based uplink access method, which can pass a license in an explicit way Provide one or more uplink access opportunities for the UE, so as to improve the success rate of the UE uplink access when multiple UEs have data to be sent at the same time, thereby improving the performance of the UE uplink access. figure 2 It shows the process of implementing the contention-based uplink access method. Such as figure 2 As shown, the method mainly includes:

[0045] Step 201: Define at least one uplink access mode selectable by the UE and determine an index corresponding...

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Abstract

The invention discloses an uplink access method, a device and a system based on competition. The method includes that at least one uplink access mode selectable for user equipment (UE) is defined and an index corresponding to the at least one uplink access mode is built; an identification (CB-RNTI) for competition access is determined; an uplink access mode for the UE in the uplink access is determined; a base station sends a competition access permission signaling with the identification CB-RNTI on a downlink control channel and informs the UE and the index corresponding to the upper access mode used by the UE; the UE monitors the competition access permission signaling in the downlink control channel through the CB-RNTI, and if the competition access permission signaling is monitored and data are needed to be sent, the uplink access mode adopted by the uplink access is determined according to the index of the uplink access mode carried in the competition access permission signaling. According to the method and the system, the transmission delay of data packets can be effectively reduced.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to a contention-based uplink access method, device and system. Background technique [0002] Cellular mobile phones have brought great convenience to people's communication. The second generation Global System for Mobile Communication (GSM, Global System for Mobile Communication) adopts digital communication technology to further improve the call quality of mobile communication. The 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project), as an important organization in the field of mobile communication, has greatly promoted the standardization of the 3rd generation mobile communication technology (3G, The Third Generation), and formulated a series of broadband codes including Communication systems including Wide Code Division Multiple Access (WCDMA), High Speed ​​Downlink Packet Access (HSDPA, High Speed ​​Downlink Packet Access), and High Speed ​​U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 李安新闫渊高新颖加山英俊原田笃须田博人
Owner NTT DOCOMO INC
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