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Walsh code distribution method

A code allocation and code tree technology, applied in the field of spread spectrum, can solve the problem of low time utilization rate of Walsh codes, achieve the effect of improving time utilization rate, increasing data throughput, and reducing idle time

Active Publication Date: 2006-10-25
XFUSION DIGITAL TECH CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The disadvantage of the prior art is that the Walsh code is not really used within the SCH start-up delay time, resulting in low time utilization of the Walsh code

Method used

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Embodiment 1

[0044] In this embodiment, determining the Walsh codes for early release is: when the network side prepares to allocate the SCH, the Walsh codes to be released in the carrier frequency within the SCH start delay time are determined as the Walsh codes for early release.

[0045] image 3 It is a schematic diagram of the Walsh code allocation process in this embodiment, image 3 The process shown consists of the following steps:

[0046] Step 301: The network side prepares to allocate the SCH, queries the SCH in the carrier frequency that will be released within the SCH start delay time, and releases the Walsh code in advance.

[0047] In this document, the SCH to be allocated by the network side is called a new SCH, and the SCH to be released is called an original SCH.

[0048] The SCH that will be released within the SCH start delay time in step 301 refers to the SCH that will be released within the SCH start delay time after the continuation judgment is made some time befor...

Embodiment 2

[0063] In this embodiment, the early release of the Walsh code is: after the SCH continuation judgment is made in advance, the Walsh code of the SCH that is judged not to be continued and the Walsh code that will be released after the speed reduction of the SCH that is judged to be a deceleration continuation are determined as early release Walsh codes and immediate early release. This embodiment can be implemented by setting a predictive code tree and allocating Walsh codes according to the free Walsh codes in the predictive code tree.

[0064] Figure 5 It is a schematic diagram of the Walsh code allocation process in this embodiment, Figure 5 The process shown consists of the following steps:

[0065] Step 501: The network side sets the predictive code tree in advance, and regularly updates the predictive code tree.

[0066] The predicted code tree in step 501 is used to mark the idle and occupied state of the Walsh code after a certain period of time, which contains ti...

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Abstract

This invention discloses a distributing method for Walsh codes characterizing in including the following steps: a, determining the released Walsh codes in advance based on the delay judgment before finishing the burst of the service channel and releasing them in advance, b, distributing the Walsh codes based on the current idle Walsh codes and those released in step a to increase the time usability of code resources.

Description

technical field [0001] The invention relates to the spread spectrum technology in the mobile communication system, in particular to a method for distributing Walsh codes. Background technique [0002] Walsh codes are often used in mobile communication systems, such as in code division multiple access (CDMA, CodeDivision Multiple Access) system forward channel modulation, Walsh codes are used for spreading and are also used to distinguish each forward channel. Forward refers to the direction of the radio signal from the network side to the mobile station. In the radio signal carrier frequency sent by the network side, the Walsh codes corresponding to each forward channel must be orthogonal to each other to ensure correct decoding. Therefore, the network side needs to allocate and manage the carrier frequency Walsh codes. Generally, each carrier frequency has a Walsh code tree, figure 1 is a schematic diagram of the Walsh code tree, figure 1 In , the Walsh code is decompose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04J13/18
CPCH04J13/0048H04J13/18
Inventor 邓洲宇
Owner XFUSION DIGITAL TECH CO LTD
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