Wireless communication system channel adjusting method based on orthogonal variable spread-spectrum factor code

Abstract

The invention discloses a channel regulation method for a wireless communication system coded based on orthogonal variable spread-spectrum factor (SF), which comprises: 1. based on SF, checking whether there is unoccupied channel with adjacent occupied or clogged channel or not; if yes, recording the channel with a sequence number and corresponding SF information; or else, ending the process; 2. checking whether there are channels with the same SF according to an order of SF from large to small; if no, ending the process; or else continuing to step 3; 3. selecting checked arbitrarily two channels as regulation objects, composing an adjacent channel and sub channels of one channel into a source channel set and another channel with its sub channels into an objective channel set, and mutually transplanting all sub-sets of the source and objective sets; 4. updating all channel state information, and returning to step 2. The invention reduces code channel fragment and code list dispersion, and improves system business access rate and resource availability.

Description

technical field [0001] The invention relates to a channel adjustment method of a wireless communication system, in particular to a dynamic channel adjustment method of an uplink time slot in a system based on orthogonal variable spreading factor coding. Background technique [0002] In a time division multiplexing code division multiple access system, physical channels are identified by combinations of carrier frequency / frame / subframe / time slot / spreading code. In the following, a time division synchronous code division multiple access system (TD-SCDMA) is taken as an example for description. In TD-SCDMA, every 10ms on each specified carrier frequency is a frame, each frame is divided into two subframes, the structure of the two subframes is the same, and each subframe is divided into 7 regular time slots and There are 3 special time slots, and the user's business data is carried on the regular time slots. [0003] The spreading code adopted by the TD-SCDMA technology is a...

AI Technical Summary

Problems solved by technology

However, user dropped calls will also cause code channel fragmentation. The so-called code channel fragmentation is due to the fact that the distribution of code channels with larger spreading factors occupied by users in the code tree is more discrete, thereby blocking the parent code with smaller spreading factors. road

Because high-speed services need to allocate code channels with a small spreading factor, the existence of code channel fragments makes it impossible to accommodate this high-speed service, resulting in a decrease in the call throughput rate of the system, a reduction in capacity, and a low utilization rate of code resources.

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