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Carrier polymerizing method in FDD system and device thereof
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A carrier aggregation and frequency division duplexing technology, which is applied in multi-frequency code systems, transmission path separation devices, transmission systems, etc., and can solve problems such as inability to obtain uplink and downlink channel reciprocity.
Active Publication Date: 2012-09-05
HUAWEI TECH CO LTD
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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
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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 present invention discloses a carrier polymerizing method in a frequency division duplex (FDD) system and a device thereof, which relates to the field of radio communication. The carrier polymerizing method comprises the following steps: at least one carrier in N carriers is set as a first carrier, one radio frame of the first carrier comprises a downstream time slot, an upstream time slot and a guard period (GP), and the GP is arranged between the downstream time slot and the upstream time slot; when the first carrier is configured as an upstream channel, the first carrier is polymerizedwith upstream carriers in the N carriers into an upstream carrier; otherwise, when the the first carrier is configured as a downstream channel, the first carrier is polymerized with downstream carriers in the N carriers into a downstream carrier; all the N carriers comprise symmetrical carriers and non-symmetrical carriers or non-symmetrical carriers, and the first carrier is arranged on the non-symmetrical carriers or the downstream carriers of the symmetrical carriers. Easy conversion of the carriers between the upstream and the downstream channels in the FDD system is realized by the carrier polymerizing method in an FDD system and the device.
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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