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Device and method for transmitting schedule request message

A technology for user equipment and signals, applied in the direction of error prevention/detection using the return channel, multi-frequency code system, etc., which can solve the problems of transmitting SRI and CQI information, the influence of the base station scheduler, and the change of the output rate.

Inactive Publication Date: 2008-08-13
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method is to reserve a CQI code word to represent SRI information. With this method, when the user equipment sends SRI information, the CQI report is interrupted once, so it may have a certain impact on the base station scheduler.
The second method is to jointly encode the SRI information bits and CQI bits and then send them on the CQI channel. This method can also be understood as reserving one of the available bits carried by the CQI channel for SRI, so To a certain extent, the performance of the CQI report is reduced; and in practice, the link performance requirements of SRI and CQI are generally different, but with this joint coding method, the link performance of SRI and CQI is the same, that is, It is said that SRI and CQI information cannot be transmitted according to the respective performance requirements of SRI and CQI
In addition, the output rate of the adaptive multi-rate (AMR) encoder will also change
In these cases, the base station may need to change the resources allocated to the persistent schduling of the user equipment

Method used

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  • Device and method for transmitting schedule request message
  • Device and method for transmitting schedule request message
  • Device and method for transmitting schedule request message

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Embodiment

[0123] 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

[0125] This embodiment corresponds to a method of multiplexing CQI information and SRI information. According to the definition of the uplink wireless frame structure in the current LTE system, each time slot contains 7 SCFDMA symbols, and according to image 3 In the shown structure of the uplink control channel, the uplink control signaling is distributed and transmitted in two time slots on different frequencies. It is assumed here that one SCFDMA symbol is used for transmitting uplink reference signals in each time slot, and the present invention does not limit the number of SCFDMA symbols used for reference signals in each time slot.

[0126] Such as Figure 13 As shown, because there are 14 SCFDMA symbols in one TTI, 2 of which are used as uplink reference signals, so there are still 12 SCFDMA symbols used to transmit uplink control information. Since each SCFDMA symbol can transmit one modulation symbol, the number of available modulation symbols is N=12. Because eac...

no. 2 example

[0130]This embodiment corresponds to multiplexing a generalized uplink ACK / NACK channel to transmit information such as uplink ACK / NACK and SRI. It is assumed here that a data packet needs to be transmitted every 20ms, and the HARQ retransmission interval is assumed to be 5ms, so that a maximum of 3 retransmissions can be allowed between two initial data transmissions.

[0131] Such as Figure 14 Shown is a schematic diagram of the base station sending downlink data and the user equipment sending uplink ACK / NACK and SRI. Here, it is assumed that the base station has transmitted two data packets in the downlink direction, and it is assumed that when sending the first data packet, the transmission is successful after one retransmission ; When sending the second data packet, only one data transmission is successful. Correspondingly, for the first data packet, the user equipment needs to send ACK / NACK information twice, that is, send NACK for the first time and send ACK for the s...

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Abstract

The invention relates to a device and a method of uplink control signaling for transmitting scheduling request indicating information. The method for multiplexing SRI information and CQI information by the user device: when there is no need to emit SRI information, the user device uses whole uplink power to transmit CQI information, thus improving transmission performance of CQI information. The method for processing generalized ACK / NACK channel can increase the chance of transmitting SRI information by the user device, thus lowering the transmission delay of uplink scheduling request, and lowering cost for allocating SRI channel signaling. The CAZAC sequence method for arranging uplink channel can equalize interface from adjacent zones, therefore improving the transmission performance of uplink control signaling.

Description

technical field [0001] The present invention relates to a wireless communication system, and more specifically relates to a device and method for transmitting scheduling request information in a wireless communication system. Background technique [0002] Now, the 3GPP standardization organization has begun to carry out the long-term evolution (LTE) of its existing system specifications. Among the many physical layer transmission technologies, the downlink transmission technology based on Orthogonal Frequency Division Multiplexing (OFDM) and the uplink transmission technology based on Single Carrier Frequency Division Multiple Access (SCFDMA) are research hotspots. OFDM technology is essentially a multi-carrier modulation communication technology. Its basic principle is to decompose a high-rate data stream into several low-rate data streams and transmit them simultaneously on a group of mutually orthogonal sub-carriers. OFDM technology has performance advantages in many asp...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/16
Inventor 李迎阳张玉建李小强李周镐
Owner BEIJING SAMSUNG TELECOM R&D CENT
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