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A method and device for control cell recognition in long evolved system

A long-term evolution system and cell identification technology, which is applied in the field of communication to achieve the effect of control

Inactive Publication Date: 2008-02-20
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the method of identifying cells in WCDMA is no longer applicable to LTE

Method used

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  • A method and device for control cell recognition in long evolved system
  • A method and device for control cell recognition in long evolved system
  • A method and device for control cell recognition in long evolved system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 is an operation process for identifying a cell that is not in the cell list, as shown in Figure 1, including the following steps:

[0063] Step 1: The network side sends a measurement control message, or other messages containing the content of "instructing the UE to measure co-frequency adjacent cells that are not in the cell list";

[0064] Step 2: After receiving the message, the UE demodulates the message; if the SCH (Synchronization Channel) channel is designed in the time domain to have only one SCH symbol (Synchronization Channel Symbol) in a wireless frame, as shown in Figure 2, that is, 10ms There is only one SCH symbol in the UE, then the UE performs step 3, otherwise performs step 4;

[0065] Step 3: UE follows the instructions of the network side at time T SCH symbol sync time First, perform symbol synchronization with the indicated first target cell, determine symbol timing and subframe timing, and determine frame timing at the same time; and ...

Embodiment 2

[0100] Embodiment 2 is an operation process for identifying co-frequency adjacent cells indicated by the network, as shown in FIG. 6 , including the following steps:

[0101] Step 1: The network side sends a dedicated measurement control message or system message, and the sent message indicates the same-frequency cell to be measured and the ID information of the cell;

[0102] The cells to be measured issued by the network side include the following two situations: one is classified cells, including: cells of the same frequency layer, that is, at least adjacent cells have the same center frequency as the serving cell, adjacent cells of the same frequency or different frequency layers Community; the second is the community without classification.

[0103] The operations of steps 2, 3, and 4 are the same as in Embodiment 1, and will not be repeated here;

[0104] Step 5: UE and target cell at time T Radio frame sync time or T Radio frame sync time2 Frame synchronization withi...

Embodiment 3

[0115] Embodiment 3 is an operation process for identifying cells in the same-frequency neighbor cell list indicated by the network, as shown in FIG. 7 , including the following steps:

[0116] Wherein, step 1 to step 5 are the same as the operation in embodiment one;

[0117] Step 6: UE at time T Identify cell ID time Correlate with the searched cell through the cell ID information in the known neighbor cell list;

[0118] Step 7: If the UE finds a correlation peak, it indicates identifying the cell;

[0119] If there are unrecognized cells in the neighbor cell list, repeat the above operations to continue searching for unrecognized cells.

[0120] Step 8: If the two are not related, and the total recognition time exceeds the maximum allowed time T identify intra value range, stop identification, re-search the cell and identify it. If the time has not been greater than the maximum allowed time T identify intra value range, if there is still a cell in the neighbor cell li...

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PUM

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Abstract

The utility model relates to a control region identification method and device in a long-term evolving system, which belongs to communication technique field. The method comprises: confirming each time value range according to affecting factors on identification process in the control region; and controlling identification process in the region based on the time value obtained toward coincident-frequency measurement. The method and device in the utility model gets affecting factors on time valuation of each operation during the region identification process. These factors comprise public channel design, public pilot channel design, wireless environment, the interference, the algorithm adopted, the realization of the UE and others. During time value simulation experiment and time value confirmation process, the numeric range of each time value in the control identification region process can be effectively determined by taking the factors into consideration, so that the region identification process control can be realized.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for controlling cell identification in a long-term evolution system. Background technique [0002] In order to promote the continuous development of 3G communication technology, 3GPP proposed and deployed 3G Long Term Evolution (LTE). In LTE, the main problems to be solved are: obtaining higher user data rate, improving system capacity and coverage, and reasonable and flexible 3G spectrum allocation. In the LTE system, when the UE is in the connected state, it may trigger inter-cell handover, and whether to perform inter-cell handover depends on the measurement result of the UE. [0003] Before performing intra-frequency measurement on neighboring cells, the UE needs to obtain synchronization with neighboring cells first, and then identify the cells. For the UE, there are two situations for the same-frequency measurement: one is that the inter...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04B1/707H04B7/26H04Q7/34H04Q7/36H04W48/12
CPCH04W48/12
Inventor 李菊尹丽燕杨旭东
Owner HUAWEI TECH CO LTD
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