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Asymmetric carrier aggregation method

A carrier aggregation and asymmetric technology, applied in the direction of network traffic/resource management, electrical components, wireless communication, etc., can solve problems such as confusion and system failure, and achieve the effect of compatibility

Active Publication Date: 2014-07-16
THE RES INST OF TELECOMM TRANSMISSION MIIT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

by Figure 4 For example, the PDCCH with the same index number in the "downlink frequency band" and "downlink frequency band" will be mapped to the same PUCCH resource in the uplink frequency band, which will cause confusion and the system cannot work normally

Method used

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Embodiment Construction

[0022] A control signaling structure and a method for mapping n downlink frequency bands to one uplink frequency band according to the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The present invention firstly proposes an interleaved uplink control signaling design structure, that is, when there is one uplink frequency band and multiple downlink frequency bands, in order to avoid mapping to the same PUCCH resource when multiple downlink frequency bands are mapped to the uplink frequency band The phenomenon of confusion occurs. Each downlink component carrier sends its own downlink broadcast channel, which carries information about the center frequency point of the uplink frequency band. Through this information, the center frequency point of the uplink frequency band corresponding to each downlink component carrier is offset. Setting, specifically: assuming that there are n downlink ...

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Abstract

The invention provides an asymmetric carrier aggregation method which specifically comprises the following steps of: assuming that n downlink frequency bands, 1 uplink frequency band and n natural numbers exist in an LTE (long term evolution) FDD (frequency division duplex) system performing asymmetric carrier aggregation, wherein the unilateral bandwidth of an uplink control signaling of the uplink frequency band corresponding to the ith downlink frequency band is BWPUCCH_i, 1<=i<=n, and the center frequency point of the uplink frequency band is f0; and setting the center frequency point of the uplink frequency band corresponding to the first downlink unit carrier as: f1=f0-(BWPUCCH_2+ BWPUCCH_3+...+ BWPUCCH_n) / 2; and setting the center frequency point of the uplink frequency band corresponding to the ith downlink unit carrier except the first downlink unit carrier as a formula shown in the description. The method provided by the invention has the beneficial effects that: a staggered PUCCH (physical uplink control channel) structure can be formed when the downlink unit carriers are more that uplink unit carriers so as to realize compatibility of each downlink unit carrier with a terminal.

Description

technical field [0001] The invention relates to a frequency band mapping method in wireless communication, in particular to an asymmetric carrier aggregation method for mapping multiple downlink frequency bands to one uplink frequency band. Background technique [0002] In the 3GPP Release8 (R8) Long Term Evolution (LTE) system, the uplink control channel PUCCH is located on both sides of the uplink frequency band, and the middle part is the uplink data channel PUSCH, such as figure 1 shown. [0003] Wherein, the uplink control channel PUCCH can be used to send uplink ACK / NACK feedback information corresponding to downlink data transmission. During the transmission of downlink data, the base station sends downlink data scheduling information on the downlink control channel PDCCH, and the terminal receives downlink data according to the scheduling information, and then feeds back ACK / NACK information on the uplink control channel PUCCH to complete the downlink Data receivin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/16
Inventor 林辉
Owner THE RES INST OF TELECOMM TRANSMISSION MIIT