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Method of controlling aggregate searching dispatching of CDMA communication

A CDMA communication and collection technology, applied in the field of control collection search and scheduling

Inactive Publication Date: 2004-03-03
ZHEJIANG HUALI COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soft handover can only be used when adjacent CDMA bands have the same frequency allocation, it has the difference of forward traffic channel and backward traffic channel at the base station boundary

Method used

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  • Method of controlling aggregate searching dispatching of CDMA communication
  • Method of controlling aggregate searching dispatching of CDMA communication
  • Method of controlling aggregate searching dispatching of CDMA communication

Examples

Experimental program
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Embodiment Construction

[0017] figure 1 The architecture of an example search system is described. Mcontroller enables the search hardware to search a certain PN offset window with a specified precision (1 / 4 data block offset in the example system), and returns the specified maximum number (4 in the example system) of the highest energy in the corresponding control channel The sum of the energies of several multipaths.

[0018] The search schedule contains combinations that specify the order in which the active set, candidate set, neighbor set, and other sets are searched; it also specifies the number of channels to be searched in each set within a given period of time. An example of a search combination is: AACNNNNR, which means that in a given search cycle, 2 active collective control channels, 1 candidate collective control channel, 4 neighbor collective control channels and 1 other collective control channel are searched. Search combinations usually take this form, but the number of control cha...

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Abstract

Search dispatching is dependent on time for searching control channel in set, the number of control channel in set and the intensity of these channels. Generally, given control channel is received inseveral time offset. Each offset is related to multiple routes of control channel. One PN offset region (searching window) should be a region for searching each control channel. Energies in the window discovered from all multiple routes are summed to form the energy estimation for the control channel. Network provides size of search window in system parameters. SRCH_WIN_A defines window width of initiative set and candidate set. SRCH_WIN_N defines window width of neighbor set.

Description

Technical field: [0001] The invention relates to a control set search scheduling method for CDMA communication, which belongs to the field of mobile communication manufacturing. Background technique: [0002] In CDMA1 and CDMA2000 standards, each base station will continuously send non-data-modulated direct sequence signals in the control channel. This signal is composed of a data block stream (CHIP), and the maximum length of each data block is a PN (pseudo-noise) sequence (the period of each sequence is 2 15. ), the control channel is identified by a length interval of 64 data blocks compared with the 0 offset control (PN) sequence. In addition to providing a reference phase for coherent demodulation, the control signal can also enable the mobile station (terminal) to obtain and maintain the previous To the timing of the data link, and to judge the strength of the base station signal to switch in a timely manner. [0003] In the above-mentioned CDMA standard, soft / hard h...

Claims

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Application Information

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IPC IPC(8): H04W74/04H04B7/26H04J13/02
Inventor 汪力成高东杨
Owner ZHEJIANG HUALI COMM TECH
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