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Method for sending lead code, method and terminal for realizing downlink synchronization

A technology of preamble and main preamble, which is applied in the field of downlink synchronization and preamble transmission methods, can solve the problems of long downlink synchronization time between terminal and base station and unsatisfactory preamble, and achieve fast downlink synchronization and cell identification needs, overcoming the effects of overtime

Active Publication Date: 2013-01-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to provide a method for sending a preamble, a method for realizing downlink synchronization and a terminal, so as to solve the problem that the downlink synchronization time between the terminal and the base station in the prior art is too long and the existing preamble cannot meet the requirements of the 802.16m system. The problem of community identification needs

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  • Method for sending lead code, method and terminal for realizing downlink synchronization
  • Method for sending lead code, method and terminal for realizing downlink synchronization
  • Method for sending lead code, method and terminal for realizing downlink synchronization

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Embodiment 1

[0024] based on figure 1 As shown in the frame structure, the present invention aims at the deficiencies of the IEEE802.16e preamble, and provides a method for sending the preamble. This method can easily realize the expansion of the cell identity on the basis of accelerating the downlink synchronization process. The following combines attached figure 2 This method is described in detail. Such as figure 2 As shown, the method includes:

[0025] Step S201, the base station sets a primary preamble carrying cell type information and a secondary preamble carrying cell / sector identification information;

[0026] In step S203, the base station sends a preamble including a primary preamble and a secondary preamble to the terminal in a predetermined manner.

[0027] It can be seen from the above description that the base station sends the preamble of the present invention to the terminal in a predetermined manner, wherein the primary preamble carries cell type information, and t...

Embodiment 2

[0055] In this embodiment, a downlink synchronization method for a terminal and a base station is also provided, combining Figure 7 Describe the downlink synchronization method in detail, including:

[0056] Step S702, the terminal receives a preamble from the base station, wherein the preamble includes a primary preamble carrying cell type information and a secondary preamble carrying cell / sector identification information;

[0057] Step S704, the terminal obtains the main preamble at the preset bandwidth, where the preset bandwidth may be the minimum bandwidth of the system, such as 5MHz;

[0058] Step S706, the terminal acquires the secondary preamble according to the obtained primary preamble, and realizes downlink synchronization with the base station through the primary preamble and the secondary preamble.

[0059] Wherein, the main preamble also carries system configuration information for distinguishing different system configurations, wherein the system configuratio...

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Abstract

The invention discloses a method for sending a lead code, a method and a terminal for realizing downlink synchronization. The method for realizing the downlink synchronization comprises the following steps: receiving the lead code from a base station by the terminal, wherein the lead code comprises a main lead code carrying community type information and an auxiliary lead code carrying community / sector identification information; acquiring the main lead code on preset band width by the terminal; and acquiring the auxiliary lead code through the acquired main lead code and realizing the downlink synchronization with the base station according to the main lead code and the auxiliary lead code by the terminal. The invention can meet the need of a 802.16 m system on community identification and realize the fast downlink synchronization.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for sending a preamble, a method for realizing downlink synchronization and a terminal. Background technique [0002] For the next generation mobile communication system (such as WiMAX (Worldwide Interoperability for Microwave Access, Worldwide Interoperability for Microwave Access)) based on Orthogonal Frequency Division Multiple Access (OFDMA) multiple access mode, in a given Under the system bandwidth of , from the perspective of frequency domain, different users realize multiple access by occupying a certain number of orthogonal subcarrier resources. [0003] In the IEEE802.16e protocol, the preamble is used to mark the beginning of a frame. The preamble occupies one symbol in the time domain and is composed of subcarriers in the frequency domain. A pseudorandom sequence (such as pseudo noise (Pseudo Noise, referred to as PN sequence) is modulated onto subcarriers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04B1/7073
Inventor 方惠英曲红云孙长印
Owner ZTE CORP