Method and apparatus for sending SRS in LTE TDD system

一种发送信号、配置信息的技术，应用在通信系统领域，能够解决传输周期无法实现等问题，达到保证SRS上行覆盖、大系统频谱效率的效果

Active Publication Date: 2009-08-12
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, according to the difference between LTE FDD and LTE TDD, we found that according to the current design, the 2ms SRS transmission cycle adopted in the LTE FDD system cannot be realized in the LTE TDD system

Method used

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  • Method and apparatus for sending SRS in LTE TDD system
  • Method and apparatus for sending SRS in LTE TDD system
  • Method and apparatus for sending SRS in LTE TDD system

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Embodiment

[0059] This section presents three embodiments 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.

no. 1 example

[0061] In this embodiment, the UpPTS consists of 2 SCFDMA symbols. The UE first generates the SRS sequence to be sent, and sends the SRS signal on the 2 SCFDMA symbols according to the received SRS configuration information. The transmission of the SRS signal occupies 4 RBs (each RB consists of 12 subcarriers, a total of 48 subcarriers), and Comb0 (501) is used to transmit SRS in the first SCFDMA symbol (503), and in the second SCFDMA symbol ( 504) Use Comb1 (502) to transmit SRS.

no. 2 example

[0063] In this embodiment, the UpPTS consists of 2 SCFDMA symbols. The UE first generates the SRS sequence to be sent, and sends the SRS signal on the 2 SCFDMA symbols according to the received SRS configuration information. One end of the frequency band of the system (at the Image 6 above) is the shortRACH (604) that transmits 6 RBs, and the SRS transmission occupies 2 RBs (a total of 24 subcarriers). The first SCFDMA symbol (602) uses frequency resources different from the second SCFDMA symbol (603) to transmit SRS, the frequency resource used by the first SCDMA symbol is 601, and the frequency resource used by the second SCDMA symbol is 605. Comb 0 (601) is used to transmit SRS in the first SCFDMA symbol (602), and Comb 1 (605) is used to transmit SRS in the second SCFDMA symbol (603).

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Abstract

The invention provides a method for transmitting an SRS in an LTE TDD system, which can basically achieve the effect that LTE FDD sends an SRS signal according to the period of 2ms. At the same time, compared with the LTE FDD, the method does not increase the downlink signaling cost of the system, ensure the uplink coverage of the SRS, is favorable for the scheduling of the system, and achieves larger system spectral efficiency.

Description

technical field [0001] The present invention relates to a communication system, in particular to a method and a device for sending SRS in the communication system. Background technique [0002] 3GPP (The 3 rd Generation Partner Project) standardization organization is in the process of formulating a new generation of wireless communication standards, the name of which is LTE (Long Term Evolution). On the physical layer interface, the new standard adopts OFDM (Orthogonal Frequency Division Multiplexing) technology, which is different from the traditional CDMA (Code Division Multiple Access) technology. It uses OFDMA in the downlink and SCFDMA (Single Carrier Frequency Division Multiple Access) in the uplink. ). This new standard technology can effectively fight against multipath transmission, adopts frequency domain equalization operation to reduce the complexity of traditional time domain equalization, and is more suitable for broadband high-speed data transmission. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W16/14H04W52/08H04W74/08H04B1/707
CPCH04L5/0078H04L5/0007H04L5/026H04L5/0048H04W84/04H04B7/2621H04L27/261H04W72/20H04L5/14H04W72/0446H04J3/00H04L5/0053H04W72/044H04L5/04
Inventor 李迎阳李小强
Owner SAMSUNG ELECTRONICS CO LTD
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