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Method and apparatus for upstream and downstream resource allocation in time division duplexing mobile communication system

A mobile communication system and time-division duplex technology, which is applied in the direction of selection device, wireless communication, network traffic/resource management, etc., can solve the problem that the time-division duplex system cannot be fully and effectively utilized, the system capacity is large, and the optimal allocation of system resources cannot be guaranteed and other issues to achieve the effect of improving spectrum utilization, reducing system capacity loss, and reducing the amount of computation

Active Publication Date: 2004-11-17
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at the beginning of communication, the fixed resource allocation scheme cannot make full use of the characteristics of the time division duplex system, and cannot guarantee the optimal allocation of system resources but the maximum capacity of the system.

Method used

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  • Method and apparatus for upstream and downstream resource allocation in time division duplexing mobile communication system
  • Method and apparatus for upstream and downstream resource allocation in time division duplexing mobile communication system
  • Method and apparatus for upstream and downstream resource allocation in time division duplexing mobile communication system

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Embodiment 1

[0050] By calculating the uplink and downlink capacity and business volume of the cell and their ratio in the system, the total amount of available resources of each cell can be obtained. First, for the convenience of understanding and presentation, a parameter C is constructed using the downlink capacity, uplink capacity and the ratio of downlink traffic to uplink traffic in the cell to represent the total amount of available resources in the cell. The total amount of available resources C in the cell excludes unavailable resources due to one-way restriction, and reflects the real load capacity of each cell under the current business ratio. In Embodiment 1 of the present invention, the parameter is constructed by the following method:

[0051] 1) When the ratio V of the downlink to uplink capacity in the cell is smaller than the ratio R of the downlink to uplink traffic volume, that is, V<R, then the system capacity is limited by the downlink capacity; formula 1)

[0052] ...

Embodiment 2

[0073] The method in Embodiment 2 divides the uplink and downlink time slots according to the service ratio of each cell under the condition that cross time slots are allowed, so that the resource uplink and downlink ratio of each cell is closer to the service uplink and downlink ratio. Considering the impact of strong interference in the cross-slot, it is simplified and equivalent to the loss of capacity in the cross-slot, because the increase of interference in the CDMA-based system means the decline of the receiving capacity, that is, the reduction of capacity. Therefore, it is possible to quantify the impact of strong interference in cross-slots on system capacity. If the time slot division of a cell is determined only based on the uplink and downlink ratio of services in the cell, cross time slots may appear in the cell and adjacent cells, and the capacity loss introduced by the cross time slots may exceed the uplink and downlink time slots. The capacity increase obtained...

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Abstract

The invention provides a kind of distribution method and device for the upstream and the downstream resources in the time division duplex mobile communication system. The method includes following steps: the upstream and the downstream service proportion and the load information are acquired; the available resource amount in several distribution projects is calculated; the available resources amounts are compared, the distribution project whose available resource amount is the maximal are determined; compares the resources upstream and downstream proportion correspondent in the optimized distribution project and the one in current system and judges if they are the same, if not, the upstream and the downstream gap conversion of each community in the system are set according to the optimized project; when they are the same, it doesn't adjust the gas conversion. The invention reduces the system capacity loss caused by the asymmetry, it increases the capacity of the system, upgrades the utilization rate of the spectrum.

Description

technical field [0001] The invention relates to mobile communication, in particular to a method and device for allocating uplink and downlink resources in a time division duplex mobile communication system. Background technique [0002] In the third generation mobile communication system, in addition to providing traditional voice services, it also needs to carry numerous data services. Data services have the characteristics of asymmetric uplink and downlink requirements. In this case, allocating the same resources for uplink and downlink services will result in waste of some resources, and the system capacity will be greatly reduced due to one-way (uplink or downlink) restrictions. reduce. Moreover, data services are bursty, which causes the proportional relationship between uplink and downlink traffic to change dynamically with time, and a fixed asymmetric resource allocation plan based on pre-estimating the proportion cannot guarantee to provide the best service at any t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/16H04B7/005H04W72/04
Inventor 刘洋
Owner DATANG MOBILE COMM EQUIP CO LTD
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