Capacity and coverage combined design method for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) cluster system

A technology of TD-SCDMA and design method, which is applied in the field of joint design of TD-SCDMA cluster capacity and coverage, and can solve problems such as not considering the joint design of capacity and coverage

Inactive Publication Date: 2011-11-02
SHENZHEN TINNO WIRELESS TECH
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Problems solved by technology

[0008] The above-mentioned prior art does not consider joint design of capacity and coverage at the same time, but plans capacity and coverage separately, but capacity, coverage, and interference in actual TD-SCDMA trunking systems are inseparable and affect each other

Method used

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  • Capacity and coverage combined design method for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) cluster system
  • Capacity and coverage combined design method for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) cluster system
  • Capacity and coverage combined design method for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) cluster system

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example

[0019] The following describes the implementation of the present invention with reference to the accompanying drawings and specific examples.

[0020] figure 1 Shown is the division of coverage areas: the city is the center and radiates outward, and is divided into dense urban areas, urban areas, suburban areas, and rural areas. Similar methods can be used for other area shapes, and a cell type table can be established based on this.

[0021] figure 2 Shown is the flow chart of the design method of the present invention. It specifically includes the following steps, budgeting the uplink and downlink, and obtaining the maximum uplink and downlink loss. The maximum uplink and downlink loss can be calculated according to the following formula: maximum uplink path loss = maximum transmit power of the mobile station - BTS antenna feeder loss +Base station smart antenna gain +Terminal antenna gain - Fast fading margin - Slow fading margin +Switch Gain - Interference...

example 1

[0046] The following method can be used to judge whether the base station can meet the requirements of the uplink and downlink capacity of its coverage area at the same time. One scheduling communication (that is, a group) has one uplink user and one or more downlink users and the downlink users are distributed in one or more In multiple cells, assuming that the average number of downlink users for each scheduled communication is distributed in Nt cells, the ratio of uplink and downlink time slots is 1:Nt, assuming that the average number of personnel for each scheduled communication is Ng, and the business in each cell If the volume is C, the uplink traffic is C / Ng, and the rest is downlink traffic. Judging whether the base station can satisfy the uplink and downlink capacity requirements of its coverage area under the condition of time slot ratio 1:Nt (that is, the number of uplink and downlink users who can communicate simultaneously according to the design of the present in...

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Abstract

The invention discloses a capacity and coverage combined design method for a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) cluster system and relates to cluster communication. The technical scheme of the method comprises the following steps of: establishing a corresponding propagation model according to the maximum link loss of links; respectively calculating traffic volume of each cell according to the user density of different service cell types, the average traffic volume of each user and the coverage area of the current base station; estimating service cell radiusaccording to traffic volume and a communication satisfaction degree threshold and calculating the interference limited capacity of each service cell; checking whether or not the interference limited capacity of base stations in the cells meets the capacity requirement of coverage areas of the base stations in the cells one by one; and if not, performing a capacity expansion technology till the capacity requirement of the coverage areas can be met, and then determining the number of channels. The method can be applied to the plan and optimization of a TD-SCDMA cluster network.

Description

technical field [0001] The invention relates to the technical field of TD-SCDMA clusters, in particular to a joint design method for TD-SCDMA cluster capacity and coverage. Background technique [0002] TD-SCDMA trunking system is a trunking system using code division multiple access technology, so it is a system greatly affected by interference, such as the breathing effect we often say. There is only one user in the uplink of the trunking system, and each user obtains the right to speak by preempting the channel. When preempting, users are divided into priorities. Users with high priority occupy the channel first to obtain the right to speak. Users with high priority are often important personnel. Such as those who play an organizational and leadership role in scheduling. The downlink channel of the trunking system is similar to the shared channel in the TD-SCDMA system, which is shared by one or more users. [0003] The capacity and coverage of the TD-SCDMA trunking sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/18
Inventor 唐宏吴财生陈前斌张艳王玮
Owner SHENZHEN TINNO WIRELESS TECH
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