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Device and method for transmitting broadcast information in a wireless communication system

A technology of wireless communication system and broadcast information, applied in the field of wireless communication system, can solve the problem of reducing processing gain, etc., achieve the effect of improving accuracy, improving spectrum utilization rate, and reducing time

Inactive Publication Date: 2008-12-24
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
  • Description
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Problems solved by technology

The disadvantage of this method is that for a synchronous network, when the mobile speed of the user equipment is slow, since the modulation symbol of the received P-BCH of the adjacent cell does not change much between each frame, the P-BCH of the adjacent cell The interference generated by the P-BCH is coherently superimposed when the user equipment receives the P-BCH of the cell, thereby reducing the processing gain brought by the 4 transmissions

Method used

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  • Device and method for transmitting broadcast information in a wireless communication system
  • Device and method for transmitting broadcast information in a wireless communication system
  • Device and method for transmitting broadcast information in a wireless communication system

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Embodiment

[0052] This section presents an embodiment of the invention. In order to avoid making the description of this patent too lengthy, in the following description, detailed descriptions of functions or devices that are well known to the public are omitted.

[0053] In this embodiment, it is set to adopt the second method of time-domain spread spectrum. It is set that four radio frames are used to transmit the P-BCH in the TTI of the P-BCH, and the sets of channelization codes used are 1 -1 1 1, 1 1 -1 1 and 1 1 1 -1. It is set to use k to indicate the physical layer identity in the physical layer cell identity group. In this way, when k=2, the channelization code is 1 1 1 -1. Therefore, the base station transmits the P-BCH according to Figure 6 As shown in the coding chain diagram, the channelization code elements used are selected according to the channelization code 1 1 1 -1, thereby generating the sequence S accordingly B . Set the start frame of P-BCH in one TTI as radio...

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Abstract

The invention provides a method for transmitting broadcast message in a wireless communication system. The method comprises the following steps: (a) a base station selects a channelization code used by a main broadcast channel of a cell according to the cell identification on physical layer of the cell; and (b) the base station uses the channelization code to spread the spectrum of the main broadcast channel of the cell and transmit the main broadcast channel of the cell. Compared with other methods for transmitting broadcast message, the method in the invention can effectively eliminate interference generated by a broadcast channel of adjacent cell in a synchronous network, improve the accuracy of a user device for receiving broadcast message, and reduce time for cell searching, thereby improving the frequency spectrum of a system.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a device and method for transmitting broadcast information in the wireless communication system. Background technique [0002] Now, the 3GPP standardization organization has begun to carry out long-term evolution (LTE, Long Term Evolution) of its existing system specifications. Among the many physical layer transmission technologies, downlink transmission technology based on Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) and single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access, hereinafter referred to as SC) -FDMA) uplink transmission technology is a research hotspot. OFDM technology is essentially a multi-carrier modulation communication technology. Its basic principle is to decompose a high-rate data stream into several low-rate data streams and transmit them simultaneously on a group of mut...

Claims

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Application Information

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IPC IPC(8): H04L1/04H04B1/707H04J13/02H04L27/26H04W4/06
Inventor 张玉建李小强赵俊暎
Owner BEIJING SAMSUNG TELECOM R&D CENT
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