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Carrier aggregation method and device in frequency division duplex (FDD)

A technology of carrier wave and monitoring pilot frequency, which is applied in transmission systems, digital transmission systems, electrical components, etc., and can solve the problem that the reciprocity of uplink and downlink channels cannot be obtained.

Active Publication Date: 2015-05-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventor found in the process of implementing the present invention that: in the FDD mode carrier aggregation scheme, because a carrier either bears downlink transmission or uplink transmission, the reciprocity of the uplink and downlink channels of this carrier cannot be obtained

Method used

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  • Carrier aggregation method and device in frequency division duplex (FDD)
  • Carrier aggregation method and device in frequency division duplex (FDD)
  • Carrier aggregation method and device in frequency division duplex (FDD)

Examples

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Effect test

no. 7 example

[0067] The seventh embodiment of the present invention is a carrier aggregation device in a frequency division duplex FDD system, such as Figure 10 As shown, the carrier aggregation device 70 includes:

[0068] The configuration unit 71 is configured to configure at least one of the N carriers as the first carrier, and a radio frame of the first carrier includes a downlink time slot, an uplink time slot, and a guard time GP, wherein the GP is located in the downlink time slot, the uplink time slot gap between;

[0069] An aggregation unit 72, configured to aggregate the first carrier and the uplink carriers of the N carriers into an uplink carrier when the first carrier is configured as an uplink channel; or to aggregate the first carrier into an uplink carrier when the first carrier is configured as a downlink channel A carrier is aggregated with downlink carriers among the N carriers to form a downlink carrier.

[0070] Wherein, the N carriers in the configuration unit 71...

no. 8 example

[0085] In a wireless communication system, in order to improve the downlink transmission performance of cell edge users, downlink coordinated multi-point transmission in the Coordinated Multi-Point transmission (CoMP for short) technology can be used, that is, multiple cells jointly transmit data to the same terminal. The signal is transmitted so as to enhance the signal to interference-and-noise ratio (SINR) of the signal received by the terminal or improve the throughput of system transmission.

[0086] The downlink CoMP technology requires the base station to know the channel information of the downlink channel. Because the FDD uplink and downlink frequency bands are different, the reciprocity of the uplink and downlink channels cannot be obtained, that is, the accurate downlink channel information cannot be obtained through the SRS on the uplink carrier, so that it cannot be effectively obtained. Gain of downlink CoMP technology. If the channel information of the downlink ...

no. 10 example

[0094] The tenth embodiment of the present invention is a device for obtaining uplink and downlink channel reciprocity, such as Figure 14 As shown, the carrier aggregation device 140 includes:

[0095] The configuring unit 141 is configured to configure at least one downlink carrier among the N carriers as a first carrier; wherein the N carriers include symmetric carriers and / or asymmetric carriers.

[0096] The bearing unit 142 is configured to bear at least one monitoring pilot SRS on the first carrier.

[0097] Wherein, a radio frame of the first carrier in the configuration unit 141 includes:

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Abstract

The embodiment of the invention discloses a carrier aggregation method and device in frequency division duplex (FDD), relating to the field of wireless communication, wherein the carrier aggregation method comprises the steps of: configuring at least one carrier in N carriers into a first carrier, wherein a wireless frame of the first carrier comprises a downlink time slot, an uplink time slot and a guard period (GP), the GP is arranged between the downlink time slot and the uplink time slot; when the first carrier is configured into an uplink channel, aggregating the first carrier and uplink carriers in the N carriers into uplink carriers; or when the first carrier is configured into a downlink channel, aggregating the first carrier and downlink carriers in the N carriers into downlink carriers, wherein the N carriers comprise symmetrical carriers and asymmetric carriers or asymmetric carriers, the first carrier is arranged on the downlink carriers of the asymmetric carriers and / or symmetrical carriers. By adopting the carrier aggregation method and system in an FDD system, the reciprocity of the uplink channel and the downlink channel of the carriers is obtained in the FDD system.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a carrier aggregation method and device in a frequency division duplex FDD system, and a method and device for obtaining uplink and downlink channel reciprocity. Background technique [0002] Generally, communication is bidirectional, that is, duplex communication can be implemented in two ways: frequency division duplex (FDD) and time division duplex (TDD). where FDD mode such as figure 1 As shown, the two-way communication of receiving and transmitting is implemented on two separate symmetrical frequency channels, and the guard frequency band is used to separate the receiving and transmitting channels. The direction of the arrow from the base station (base station, BS) to the user equipment (user equipment, UE) represents the downlink channel, and the direction of the arrow from the UE to the BS represents the uplink channel. The downlink channel from the base station to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
Inventor 孙立新吕永霞万蕾
Owner HUAWEI TECH CO LTD