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Implementation method and system for carrier aggregation in wireless communication system

A wireless communication system and carrier aggregation technology, applied in the field of wireless communication, can solve the problems of signal interference, resource occupation, power consumption of base stations, etc., and achieve the effect of avoiding interference

Active Publication Date: 2012-09-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In summary, according to the above-mentioned technical requirements of the current carrier technology, in the LTE system, when the number of users is small, or the total user data transmission rate is not high, the base station still needs to always open all carriers (here The carrier includes the main carrier and the auxiliary carrier), including sending system messages, synchronization signals, common pilots, etc. on each carrier (the carrier here includes the main carrier and the auxiliary carrier), which will inevitably lead to the problem of unnecessary occupation of resources, resulting in unnecessary use of the base station. power consumption and may cause interference to the signal of neighboring cells

Method used

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  • Implementation method and system for carrier aggregation in wireless communication system
  • Implementation method and system for carrier aggregation in wireless communication system
  • Implementation method and system for carrier aggregation in wireless communication system

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Embodiment 1

[0049] Embodiment 1: (TDD mode)

[0050] In this embodiment, the cell is composed of a primary carrier and a secondary carrier, and the primary carrier can adopt the TDD frame structure in the existing wireless communication system or a new frame structure, such as the entire subframe only contains the data field and has no control field .

[0051] This embodiment adopts the TDD frame structure of the LTE system, and all configurations conform to the LTE specification, and UEs in the TDD mode of the traditional LTE system can search and camp on the main carrier.

[0052] For the main carrier, system messages, synchronization signals and paging messages are sent on the main carrier; a random access channel is configured, and users perform random access on the main carrier; the main carrier schedules users through the physical control channel (PDCCH). Wherein, the system message of the primary carrier may add some information of the secondary carrier, such as the frequency, ban...

Embodiment 2

[0066] Embodiment 2: (FDD mode)

[0067] In this embodiment, the cell is in FDD mode and consists of two pairs of carriers, a pair of main carriers and a pair of auxiliary carriers. The main carrier adopts the FDD frame structure in the existing wireless communication system or a new frame structure.

[0068] This embodiment adopts the FDD frame structure of the LTE system, and all configurations conform to the LTE specification, and the UE in the FDD mode of the traditional LTE system can search and camp on the primary carrier.

[0069] The FDD mode is the same as the TDD mode in the first embodiment. The method for the UE to use the resources of the secondary carrier is also the same as that in Embodiment 1. That is as follows:

[0070] The process for the system to schedule users to use secondary carrier resources includes: for a new type of UE (such as an LTE-LAN ​​terminal, which can configure and use the carrier aggregation method described in the present invention), t...

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Abstract

The invention discloses an implementation method for carrier aggregation in a wireless communication system. The method includes: configuring a cell which is composed of a primary carrier and a plurality auxiliary carriers, and using the primary carrier to send system information and / or synchronize signals and / or pilot frequency publicly; configuring the use of the auxiliary carriers through a system. The invention further discloses an implementation system for carrier aggregation in the wireless communication system. A configuration unit is used for configuring the cell which is composed of the primary carrier and the plurality auxiliary carriers. By the method and the system, meaningless power consumption of a base station and interference to neighboring cell signals are avoided.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and system for realizing carrier aggregation in a wireless communication system. Background technique [0002] In order to provide higher data rates to mobile users, the Long Term Evolution Advanced system (LTE-A, Long Term Evolution Advance) proposes a Carrier Aggregation (CA, Carrier aggregation) technology, the purpose of which is to provide corresponding capabilities for user equipment (UE, User Equipment) provides greater bandwidth to increase the peak rate of the UE. In the LTE system, the maximum downlink transmission bandwidth supported by the system is 20MHz, and carrier aggregation is to aggregate two or more component carriers (CC, component carriers) to support a downlink transmission bandwidth greater than 20MHz, and the maximum does not exceed 100MHz. [0003] The component carrier can use frequency bands already defined by LTE, or can use fre...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W72/12
CPCH04L5/0087H04L5/14H04L5/001H04L5/005
Inventor 毛磊张银成
Owner ZTE CORP
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