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Initial cell search method, system and device

A cell search and cell technology, applied in the field of communication, can solve the problem that LTE terminals cannot normally and effectively access the serving cell, and achieve the effect of reducing usage

Active Publication Date: 2013-05-08
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially to solve the technical defect that LTE terminals in the prior art LTE-A system cannot normally and effectively access the serving cell

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  • Initial cell search method, system and device
  • Initial cell search method, system and device
  • Initial cell search method, system and device

Examples

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Embodiment 1

[0035] As an embodiment of the present invention, the BCH carries a variety of system information necessary for the terminals in the cell to work normally. Due to the difference in system design, for the LTE-A system and the LTE system, the configured BCH needs to carry The system information of the LTE-A system is different, so the present invention proposes a design scheme that configures the BCH of LTE-A on the LTE-A carrier to carry the system information of the LTE-A system, and if the carrier needs to serve LTE terminals, then It is also necessary to configure the BCH of the LTE system to carry the system information of the LTE system. These SCHs and BCHs are the same on each carrier (that is, the same frequency position, the same channel / signal structure, and the same bearer information). Each carrier bears the BCH channel and SCH channel of the LTE-A system, so that for the carrier visible to both the LTE system and the LTE-A system terminals, it carries both the BCH c...

Embodiment 2

[0041] Such as image 3 As shown, it is a schematic diagram of LTE and LTE-A sharing the same SCH as the existing LTE in Embodiment 2 of the present invention. In this embodiment, an SCH consistent with existing LTE is configured on each carrier (carrier 1-3) shared by LTE and LTE-A. The synchronization signal is shared by LTE and LTE-A and visible only to LTE-A. Only the LTE-ASCH recognizable by the LTE-A terminal is configured on the carrier (carrier 4). At the same time, the LTE-A BCH is configured on each carrier, and this part is the same as the BCH configuration in Embodiment 1. In this embodiment, the symbol positions of the BCH in the LTE-A system are different from the symbol positions of the SCH and the shared SCH in the LTE system. Also, this embodiment is similar to Embodiment 1. Since the BCH of LTE-A is configured on the carrier visible to LTE, which occupies the physical resources of the LTE carrier, it is necessary to modify the existing LTE specification to ...

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Abstract

The invention provides an initial cell search method comprising the following steps: a base station transmits a broadcast message within the frequency band of a long-term evolution broadband system (LTE-A), wherein at least one carrier wave within the LTE-A frequency band is visible for both long-term evolution (LTE) terminals and LTE-A terminals, a broadcast channel (BCH) of the LTE-A system anda BCH of the LTE system are configured in the carrier wave, and synchronizing information of the LTE-A system and the LTE system is configured in the carrier wave; and according to the capability of the terminal, the terminal searches cells, carries out the down time and frequency synchronization and acquires the corresponding system information. The invention enables both the LTE terminals and the LTE-A terminals to be correctly accessed into the service cell.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, system and device for initial cell search. Background technique [0002] In the long-term evolution broadband mobile communication system, such as the LTE-Advanced system (referred to as the LTE-A system in this paper), it is necessary to provide a higher peak rate through a larger transmission bandwidth to meet the needs of users. The current research tends to A method to provide greater transmission bandwidth is to aggregate multiple contiguous or non-contiguous existing frequency bands. Each of the contiguous or non-contiguous frequency bands aggregated together is called a carrier, such as figure 1 As shown, it is a schematic diagram of carrier aggregation in the prior art. In this figure, the available frequency bands of the LTE-A system are aggregated from four frequency bands (carriers), and carriers 1 to 3 are visible to LTE terminals, that is, L...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/18H04B7/26
CPCH04J11/0069
Inventor 潘学明王立波索士强肖国军
Owner DATANG MOBILE COMM EQUIP CO LTD
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