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Method and device for sending SRS in LTE TDD system

A transmission method, SC-FDMA technology, applied in the field of communication systems, can solve problems such as inability to find uplink channel resources for SRS transmission, failure to find, etc.

Active Publication Date: 2009-09-30
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the LTE TDD system, both the uplink transmission subframe and the downlink transmission subframe are included in the switching point period no matter for the 5ms switching point cycle structure or the 10ms switching point cycle structure, so that in all the seven types of LTE TDD In the configuration supported by the standard, there may not be an available 2ms or 5ms period for SRS transmission
[0021] According to the above analysis of the problems encountered in the design of LTE TDD SRS transmission, the current method of setting the SRS transmission period using the period parameters of 2ms and 5ms in the LTE FDD system needs to be redesigned in the LTE TDD system, otherwise the UE in the LTE TDD system will receive After the SRS period scheduled by the system, it may not be possible to find suitable uplink channel resources to transmit SRS

Method used

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

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Embodiment

[0115] This section presents ten 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

[0117] This embodiment corresponds to the case where the configuration number in Table 1 is 0.

[0118] First, the uplink resources that the network can configure to transmit SRS through D-BCH include UpPTS (606), Sub-frame2 (603), Sub-frame3 (604) and Sub-frame4 (605), where UpPTS consists of two SC-FDMA Symbol composition (609, 610).

[0119] Secondly, the network notifies the UE that the SRS transmission period is 2 ms through RRC signaling, and the network also notifies the UE through RRC signaling that the uplink subframe resources for SRS transmission are Sub-frame2 (603) and Sub-frame3 (604).

[0120] Then, the UE obtains the physical resource information used by the SRS transmission in the above two steps, and sends the SRS signal on one SC-FDMA symbol on Sub-frame2 (607) and one SC-FDMA symbol on Sub-frame3 (608) .

no. 2 example

[0122] This embodiment corresponds to the case where the configuration number in Table 1 is 1.

[0123] First, the uplink resources that the network can configure to transmit SRS through D-BCH include UpPTS (506), Sub-frame2 (503) and Sub-frame3 (504) on Sub-frame1 (502), where UpPTS consists of a SC-FDMA symbol composition.

[0124] Secondly, the network informs the UE that the period of SRS transmission is 2 ms through RRC signaling, and the network also uses RRC signaling to inform the UE that the uplink subframe resources for SRS transmission are UpPTS and Sub-frame2 on Sub-frame1.

[0125] Then, the UE obtains the resource information in the above two steps, and sends the SRS signal on one SC-FDMA symbol (506) on UpPTS and one SC-FDMA symbol (507) on Sub-frame1.

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Abstract

A method for sending an uplink sounding reference signal SRS comprises the following steps: acquiring a cycle parameter of an uplink channel resource which can be used for transmitting the sounding reference signal SRS and a position of an SC-FDMA symbol; and if the cycle parameter is 2 ms or 5 ms, sending an SRS signal generated in advance through an obtained actual cycle by UE. The method can guarantee the effect of sending the SRS signal periodically by LTE FDD; in addition, compared with LTE FDD, the method does not increase downlink signaling cost of a system, ensures the frequency and the quantity of the SRS transmission, and achieves the aim of monitoring an uplink wireless channel by the system.

Description

technical field [0001] The present invention relates to a communication system, in particular to a method and a device for sending SRS (Sounding Reference Signal) 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 SC-FDMA (Single Carrier Frequency Division Multiple Access). 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 transmi...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04W24/00H04W52/08H04L5/00
CPCH04L5/0048
Inventor 李迎阳李小强
Owner SAMSUNG ELECTRONICS CO LTD
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