Multi-carrier aggregation system and method thereof for selecting uplink reference signals

A multi-carrier aggregation and reference signal technology, which is applied in transmission systems, baseband system components, and shaping networks in transmitters/receivers, can solve problems such as poor accuracy, poor uplink channel accuracy, and poor orthogonality. achieve the effect of providing accuracy

Active Publication Date: 2010-07-07
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] Since the orthogonality between the uplink reference signals in different uplink reference signal sequence groups is poor, the accuracy of the base station to distinguish each UE in the same uplink carrier is poor, resulting in poor accuracy of uplink channel estimation

Method used

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  • Multi-carrier aggregation system and method thereof for selecting uplink reference signals
  • Multi-carrier aggregation system and method thereof for selecting uplink reference signals
  • Multi-carrier aggregation system and method thereof for selecting uplink reference signals

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no. 1 example

[0041] In this embodiment, a Cell ID is pre-assigned to each downlink component carrier in the same cell, and the Cell ID assigned to each downlink component carrier in the same cell is modulo the number of uplink reference signals (30 in this embodiment) The results are the same, and when the UE selects the uplink reference signal for channel estimation, the high-layer signaling instructs the UE to disable group hopping, so as to ensure that the UE selects the uplink reference signal for channel estimation, and each downlink component carrier in the same cell The uplink reference signal selected by the UE above is always from the same uplink reference signal sequence group.

[0042] For example, assign the Cell IDs of each downlink component carrier in a cell to 0, 30, 60... and assign the Cell IDs of each downlink component carrier in another cell to 1, 31, 61. .....

[0043] image 3 It is a flowchart of a method for selecting an uplink reference signal in a multi-carrier...

no. 2 example

[0059] The difference between this embodiment and the first embodiment is that this embodiment further disables sequence hopping on the basis of disabling group hopping. In this case, regardless of the length of the reference signal, the uplink reference signal is selected from the intra-group base sequence of v=0. Using the uplink reference signal selected in the second embodiment can not only improve the accuracy of PUCCH channel and SRS channel estimation, but also improve the accuracy of PUSCH channel estimation.

[0060] Embodiments of the multi-carrier aggregation system provided by the present invention are given below.

[0061] Figure 4 is a schematic diagram of the composition of the multi-carrier aggregation system provided by the present invention, such as Figure 4 As shown, the system includes a UE 401 and a base station 402 .

[0062] The UE401 on each downlink component carrier in the same cell selects an uplink reference signal in the same uplink reference ...

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Abstract

The embodiment of the invention discloses a multi-carrier aggregation system and a method thereof for selecting uplink reference signals. The method comprises the step that UE (User Equipment) on each downlink member carrier in the same cell selects uplink reference signals in the same uplink reference signal sequence set. The system comprises the UE and a base station, wherein UE on each downlink member carrier in the same cell selects the uplink reference signals in the same uplink reference signal sequence set and transmits the signals to the base station; the base station receives the uplink reference signals transmitted by the UE and performs channel estimation according to the received uplink reference signal. The invention can improve the accuracy of channel estimation which is performed by the base station according to the uplink reference signals transmitted by the UE.

Description

technical field [0001] The present invention relates to the technical field of multi-carrier aggregation communication, in particular to a multi-carrier aggregation system and a method for selecting an uplink reference signal. Background technique [0002] The Long-Term Evolution-Advanced (LTE-Advanced) system is a new type of mobile communication system developed on the basis of the Long-Term Evolution (LTE) system. It adopts a multi-carrier aggregation technology and is a multi-carrier aggregation system. [0003] Different from the LTE system, the multi-carrier aggregation system can support a wider system bandwidth than the LTE system, for example, support a bandwidth of 100 MHz. Specifically, the multi-carrier aggregation system realizes supporting wider system bandwidth than the LTE system by connecting and using the resources of multiple component carriers. [0004] A method for implementing carrier aggregation in a multi-carrier aggregation system includes: aggregat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B1/713H04L25/03
Inventor 徐婧杨鼎成王立波肖国军索士强
Owner DATANG MOBILE COMM EQUIP CO LTD
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