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Method and base station for adjusting density of PRACH (Physical Random Access Channels)

A density and channel technology, applied in the field of adjusting PRACH channel density, can solve problems such as high cost and inaccurate configuration, and achieve the effects of high accuracy, good service quality, and large throughput

Active Publication Date: 2010-08-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially solve the defects of high cost and inaccurate configuration in the prior art due to relying on manual operation to configure the PRACH channel density

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  • Method and base station for adjusting density of PRACH (Physical Random Access Channels)
  • Method and base station for adjusting density of PRACH (Physical Random Access Channels)
  • Method and base station for adjusting density of PRACH (Physical Random Access Channels)

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Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0036] The present invention mainly lies in that the configuration of the PRACH density is automatically adjusted by the base station according to the PRACH conflict probability, so manual participation is not required, the operation and maintenance cost is very low, and the base station of the present invention can adjust the PRACH density in real time according to environmental changes, thereby providing better quality of service and higher throughput. Moreover, the adjustment of the PRACH density in the present invention does not depe...

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Abstract

The invention provides a method for adjusting the density of PRACH (Physical Random Access Channels), comprising the following steps: detecting the total number of the PRACH and the number of non-collision PRACH within a statistic period T, wherein the total number of the PRACH comprises the number of the non-collision PRACH and the number of collision PRACH; calculating the collision probability of the PRACH within the statistic period T according to the total number of the PRACH and the number of the non-collision PRACH by the base station; and adjusting the density N of the PRACH according to the collision probability r, a preset first probability threshold r1 and a second probability threshold r2 within the static period T. In the invention, the configuration of the density of the PRACH is automatically adjusted according to the collision probability of the PRACH by the base station without manual participation, and the base station of the invention can adjust the density of the PRACH in real time according to the environmental variation, thereby providing better service quality and greater thuoughput.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and a base station for adjusting channel density of a PRACH (Physical Random Access Channel, Physical Random Access Channel). Background technique [0002] In an LTE (Long-Term Evolution, long-term evolution) system, a UE (User Equipment, user equipment) uses a PRACH channel to initiate random access and establish an uplink. The PRACH channel needs to occupy certain uplink time-frequency resources. If too many PRACHs are reserved, the time-frequency resources of the uplink shared channel will be preempted excessively, resulting in a decrease in the total throughput; and if the number of PRACHs is insufficiently reserved, the collision of resource preemption when the UE initiates random access will increase, resulting in Decrease in access success rate. Therefore, the setting of the PRACH channel density plays a very important role in improving the system...

Claims

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Application Information

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IPC IPC(8): H04W16/04H04W16/18H04W74/08
Inventor 张杰
Owner DATANG MOBILE COMM EQUIP CO LTD
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