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Method and device for transmitting accidental access channel pilot frequency

A technology for random access to channels and signals, which is applied in the directions of selection devices, communication between multiple stations, electrical components, etc., and can solve the problems of inability to support larger cell radius coverage requirements, inability to support coverage requirements, etc.

Inactive Publication Date: 2008-12-17
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, in the above two methods, when the first one is adopted, the maximum coverage of the supported cell is C×(GP / 3), where C is the speed of light, and the maximum coverage can be obtained by substituting the maximum GP of the two frame structures The range is 86.6km; when the second type is used, the maximum coverage area of ​​the supported cell is C×(GP / 4), and the maximum coverage area can be obtained by substituting the maximum GP of the two frame structures into 64.97km, which cannot support larger The coverage requirement of the cell radius, for example, cannot support the coverage requirement of a cell radius of 100km

Method used

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  • Method and device for transmitting accidental access channel pilot frequency
  • Method and device for transmitting accidental access channel pilot frequency
  • Method and device for transmitting accidental access channel pilot frequency

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with specific embodiments.

[0032] image 3 The flow chart of the method for sending the RACH pilot provided by the embodiment of the present invention, such as image 3 As shown, the method mainly includes the following steps:

[0033] Step 301: Obtain the GP value and GP position value adopted by the cell.

[0034] The GP value and GP position value described in this step are obtained from the broadcast channel sent by the base station.

[0035] The GP value adopted by the local cell obtained in this step may be the largest GP value among the GPs adopted by the local cell, or may be all GP values ​​adopted by the local cell.

[0036] Step 302: Calculate the delay time for sending the RACH pilot by using the acquired GP value of the cell and the preset radius of the cell to be supported.

[0037] As...

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Abstract

The invention provides a method for transmitting the random access channel (RACH) pilot frequency and a device, wherein the method comprises: obtaining the protecting time slot (GP) adopted by the district and the GP position, computing the delay time for transmitting the RACH pilot frequency through using the obtained GP value of the district and the diameter of the supported district set in advance; starting timing when receiving the downstream pilot frequency time slot, timing the delay time, transmitting the RACH pilot frequency. According to the method, the computed pilot frequency delay time can reach the diameter of the supported district, and can satisfy the larger covering request of the diameter of the district compared with the traditional technology. Furthermore, when the transmitting power of the station signal from the other district received by the local district is smaller than or equal to the delay time of certain threshold, the disturb of the downstream signal from other station on the RACH pilot frequency of the upstream of the local district can be avoided.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a method and device for sending random access channel (RACH, Random Access Channel) pilot. Background technique [0002] Random access plays an important role in the physical layer of mobile communication. It is a process initiated by the mobile terminal to obtain uplink synchronization and apply for resource allocation after establishing downlink synchronization. It is the first step for the mobile terminal to initiate communication. The specific process is: after the mobile terminal obtains downlink synchronization, it obtains all available pilot sequences in the cell through the cell broadcast message, and then randomly selects a pilot from the pilot sequence and sends it on the uplink RACH to obtain uplink synchronization and Request resource allocation. If the base station successfully detects the pilot and allocates resources for the mobile terminal, the mobile te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B1/69H04Q7/38
Inventor 吕永霞赵盟
Owner HUAWEI TECH CO LTD
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