WO2011148632A1 - 基地局及び基地局の通信方法 - Google Patents
基地局及び基地局の通信方法 Download PDFInfo
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- WO2011148632A1 WO2011148632A1 PCT/JP2011/002915 JP2011002915W WO2011148632A1 WO 2011148632 A1 WO2011148632 A1 WO 2011148632A1 JP 2011002915 W JP2011002915 W JP 2011002915W WO 2011148632 A1 WO2011148632 A1 WO 2011148632A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
Definitions
- the present invention relates to a base station and a base station communication method.
- AAS Adaptive Antenna System
- LTE Long Term Evolution
- AAS is an array antenna composed of a plurality of antenna elements, wherein the weight of each antenna element is adaptively controlled according to the propagation environment to change the directivity of the radio wave.
- the adaptive array base station corresponding to AAS uses the antenna weight calculated based on the reference signal (Reference ⁇ Signal) transmitted from the mobile station at the time of downlink transmission, so that beam forming or null steering to a desired mobile station is performed. Adaptive control is performed.
- an LTE communication frame employing the TDD scheme is composed of 10 subframes.
- Each subframe includes an UL subframe for uplink communication from the mobile station to the base station, a DL subframe for downlink communication from the base station to the mobile station, and an UL area for uplink communication in the subframe.
- a special subframe in which a DL region for downlink communication exists see, for example, Non-Patent Document 1).
- a pair of UL subframes and DL subframes (correspondence relationship) is defined, and communication between the base station and the mobile station is preferably performed using the pair. This is because when the base station receives the reference signal transmitted from the mobile station in the UL subframe, the base station can calculate an appropriate transmission weight from the reference signal, so that the downlink in the DL subframe is more efficiently performed. This is because communication can be performed.
- FIG. 5 is a diagram showing details of a pair of UL subframe and DL subframe.
- a subframe 2 that is a UL subframe and a subframe 4 that is a DL subframe are paired, and a resource block (radio communication channel) RB6 is allocated to a common mobile station.
- RB6 resource block (radio communication channel) RB6
- DRS Demodulation Reference Signal
- SRS Sounding Reference Signal exist as symbols for transmitting a reference signal.
- the DRS is a reference signal transmitted in association with user data transmitted from the mobile station to the base station
- the SRS is a reference signal that can be transmitted without associating with user data.
- FIG. 1 is a diagram showing details of a pair of UL subframe and DL subframe.
- a subframe 2 that is a UL subframe and a subframe 4 that is a DL subframe are paired, and a resource block (radio communication channel) RB6 is allocated to a common mobile station.
- the mobile station since the mobile station is assigned subframe 2 which is a UL subframe, and user data is transmitted to the base station, the mobile station uses the DRS of resource block RB6 of subframe 2.
- the reference signal can be transmitted to the base station.
- the base station When receiving the reference signal, the base station can perform optimal adaptive array control for the resource block RB6 of the subframe 4.
- a mobile station can transmit a reference signal for an adaptive array to a base station only when a pair of UL subframe and DL subframe is assigned to a common mobile station. That is, when a pair of UL subframe and DL subframe is not assigned to a common mobile station, the mobile station cannot transmit an adaptive array reference signal to the base station.
- FIG. 6 is a diagram illustrating an example of transmission of a reference signal in conventional LTE.
- subframe 2 which is a UL subframe and subframe 4 which is a DL subframe are paired.
- resource blocks RB1 to RB50 are allocated to mobile station A in subframe 4, but only resource block RB25 is allocated to mobile station A in subframe 2.
- the reference signal that the mobile station A can transmit to the base station is only related to the resource block RB25, and the reference signal cannot be transmitted for the other resource blocks (RB1 to 24, 26 to 50).
- the base station cannot calculate an appropriate reference signal transmission weight for mobile station A in resource blocks RB1 to RB2 and 26 to 50 of subframe 4, and the transmission efficiency of AAS decreases.
- the resource blocks RB1 to RB3 and RB47 to 50 that are separated in frequency from the resource block RB25, a significant decrease in transmission efficiency is inevitable.
- an object of the present invention made in view of such a point is to provide a base station and a base station communication method capable of realizing appropriate AAS control by causing a mobile station to transmit an appropriate reference signal.
- the base station having a plurality of antennas that employs time division duplex to perform radio communication with a mobile station, An assigning unit for assigning a radio communication channel to the mobile station;
- the assigning unit when an uplink radio communication channel for uplink communication in the same frequency band as a downlink radio communication channel for downlink communication is not assigned to the mobile station, the mobile station receives the downlink radio communication channel and A request unit for requesting reference signal transmission using a reference signal region of an uplink radio communication channel of the same frequency band;
- a calculation unit that receives the reference signal and calculates a weight when transmitting the radio signal on the downlink radio communication channel based on the reference information; It is characterized by providing.
- the invention according to the second aspect is the base station according to the first aspect,
- the allocating unit allocates the transmission data to a plurality of downlink radio communication channels at the same timing when the size of transmission data to the mobile station exceeds a data size that can be transmitted by one downlink radio communication channel. To do.
- the invention according to a third aspect is the base station according to the first aspect,
- the communication frame includes a plurality of the radio communication channels in the frequency direction, and the communication frame includes an uplink subframe for uplink communication and a downlink subframe for downlink communication having the reference signal region in the time axis direction.
- the assigning unit assigns the uplink radio communication channel of the uplink subframe and the downlink radio communication channel of the downlink subframe to the mobile station.
- the solution of the present invention has been described as an apparatus.
- the present invention can be realized as a method, a program, and a storage medium that stores the program substantially corresponding to these, and the scope of the present invention. It should be understood that these are also included.
- the base station communication method realized as a method is as follows: A communication method of a base station having a plurality of antennas that employs time division duplex to perform radio communication with a mobile station, Assigning a radio communication channel to the mobile station; When an uplink radio communication channel for uplink communication in the same frequency band as a downlink radio communication channel for downlink communication is not assigned to the mobile station, an uplink in the same frequency band as the downlink radio communication channel is assigned to the mobile station.
- a requesting step for requesting reference signal transmission using a reference signal region of a wireless communication channel A calculation step of receiving the reference signal and calculating a weight when transmitting the radio signal on the downlink radio communication channel based on the reference information; It is characterized by having.
- An invention according to a fifth aspect is the communication method according to the fourth aspect, In the allocating step, when the size of transmission data to the mobile station exceeds a data size that can be transmitted by one downlink radio communication channel, the transmission data is allocated to a plurality of downlink radio communication channels at the same timing. To do.
- appropriate AAS control can be realized by causing a mobile station to transmit an appropriate reference signal.
- FIG. 1 is a functional block diagram of a base station according to an embodiment of the present invention.
- FIG. 2 is an operation flowchart of the base station shown in FIG.
- FIG. 3 is a diagram illustrating an example of reference signal transmission according to an embodiment of the present invention.
- FIG. 4 is a diagram illustrating an example of a communication frame configuration in LTE.
- FIG. 5 is a diagram illustrating details of a pair of subframes.
- FIG. 6 is a diagram illustrating an example of transmission of a reference signal in conventional LTE.
- FIG. 1 is a diagram showing a schematic configuration of an adaptive array base station 1, which is a base station that employs TDD (time division duplex) LTE and has a plurality of antennas, according to an embodiment of the present invention.
- the adaptive array base station 1 includes an array antenna ANT, a radio communication unit 10, an AAS processing unit 20 including a weight calculation unit 21 (calculation unit) and a weight addition unit 22, a baseband processing unit 30, a scheduler 40, It has a radio resource allocation unit 50 (allocation unit), a radio resource allocation determination unit 60, and an RS (Reference Signal) request creation unit 70 (request unit).
- the radio communication unit 10, the AAS processing unit 20, and the baseband processing unit 30 are configured by interface devices / circuits suitable for the LTE scheme, and include a scheduler 40, a radio resource allocation unit 50, a radio resource determination unit 60, and an RS request.
- the creation unit 70 includes a suitable processor such as a CPU. Details of each part will be described below.
- the radio communication unit 10 converts the radio signal received by the array antenna ANT from the frequency of the carrier wave to the baseband frequency and outputs the generated signal to the weight calculation unit 21 as a reception system process. Further, as a transmission system process, the radio communication unit 10 converts a baseband frequency signal from the weight addition unit 22 into a carrier frequency and transmits it to the mobile station through the array antenna ANT by adaptive array control.
- the receiving weight calculation unit 21 performs adaptive signal processing on the signal input from the wireless communication unit 10 and outputs the signal to the baseband unit 30. Specifically, the weight calculation unit 21 obtains for each antenna element of the array antenna ANT using the reference signal (Reference Signal) transmitted from the mobile station through the UL subframe and other known information as the adaptive signal processing. From the phase information or the like, a transmission weight (phase / amplitude weighting for each antenna element) for the DL subframe paired with the UL subframe is calculated so as to obtain a high transmission gain for the mobile station. On the other hand, the transmission-system weight addition unit 22 adds the transmission weight obtained by the weight calculation unit 21 to the signal input from the baseband unit 30 and outputs the signal to the radio communication unit 10.
- the reference signal Reference Signal
- the baseband processing unit 30 demodulates the signal input from the weight calculation unit 21 as processing of the reception system, separates the demodulation result for each mobile station, and outputs the result to the scheduler 40. In addition, the baseband processing unit 30 uses transmission data to the mobile station input from the radio resource allocation unit 50 and the RS request symbol sequence input from the RS request creation unit 70 as a weighting unit as transmission system processing. 22 for output.
- the scheduler 40 sets a mobile station to which a resource block (wireless communication channel) is allocated from the received data for each mobile station input from the baseband processing unit 30. Specifically, the scheduler 40 sets a mobile station to which resource blocks are allocated according to the received signal quality for each resource block reported from the mobile station, channel state information (CQI), or the amount of data to be transmitted.
- a resource block wireless communication channel
- CQI channel state information
- the radio resource allocation unit 50 allocates radio resources to the mobile station set by the scheduler 40.
- the radio resource allocation unit 50 has a plurality of resources in one downlink subframe. Allocate transmission data to the block. That is, when the size of transmission data to the mobile station is large, the radio resource allocation unit 50 performs radio resource allocation so that data transmission to the mobile station is completed with one downlink subframe as much as possible.
- the radio resource allocation determination unit 60 refers to the allocation result of the radio resource allocation unit 50 and determines whether a pair of UL subframe and DL subframe is allocated to the mobile station. When a pair of UL subframe and DL subframe is allocated, the base station 1 can receive a reference signal necessary for adaptive array control from the mobile station. An RS request creation instruction is not transmitted to the creation unit 70. On the other hand, when a pair of UL subframe and DL subframe is not allocated, the base station 1 cannot receive a reference signal necessary for adaptive array control from the mobile station. An RS request creation instruction is transmitted to the RS request creation unit 70.
- the RS request creation unit 70 When receiving an RS request creation instruction from the radio resource allocation determination unit 60, the RS request creation unit 70 creates an RS request for requesting the mobile station to transmit a reference signal and supplies the RS request to the baseband processing unit 30. To do.
- an RS request is assigned to a mobile station in a certain frequency (resource block), only a DL subframe is allocated, and a paired (corresponding, same frequency) UL subframe is not allocated, The mobile station is requested to transmit a reference signal using a reference signal area such as SRS of the UL subframe that forms the pair.
- FIG. 3 is a diagram illustrating an example of a reference signal transmitted by a mobile station that has received an RS request. In FIG.
- resource blocks RB1 to RB50 are allocated to mobile station A in subframe 4, but only resource block RB25 is allocated to mobile station A in subframe 2. That is, in the resource blocks RB1 to RB24 and RB26 to 50, only the DL subframe is allocated to the mobile station A, and the paired UL subframe is not allocated.
- the RS request creation unit 70 transmits a reference signal using SRS (reference signal region) to the mobile station A in the resource blocks RB1 to RB26 and RB26 to 50 of the subframe 2 that is a UL subframe.
- SRS reference signal region
- mobile station A can transmit a reference signal even in a resource block of a UL subframe that is not allocated to itself.
- the mobile station A receives the RS request from the base station 1
- the resource block RB25 of the subframe 2 allocated for uplink communication and the resource blocks RB1 to RB26 and RB26 to RB26 of the subframe 2 indicated by the RS request are transmitted.
- a reference signal is transmitted using SRS (reference signal region).
- the base station 1 can perform appropriate adaptive array control for the mobile station A not only in the resource block RB25 but also in the frequency band of the resource blocks RB1-50.
- the RS request creating unit 70 transmits an RS request, a reference signal by DRS in the resource block RB25 of subframe 2 to which the mobile station A is allocated for uplink communication, and the resource blocks RB1 to RB26 and RB26 to RB26 to RB26.
- the reference signal may be transmitted using SRS.
- FIG. 2 is an operation flowchart of the base station 1 shown in FIG.
- the radio communication unit 10 converts the received radio signal from the frequency of the carrier wave to the baseband frequency, and outputs the generated signal to the weight calculation unit 21 (step S101). ).
- the weight calculation unit 21 can obtain a high transmission gain for the mobile station from the phase information obtained for each antenna element of the array antenna ANT using the reference signal transmitted from the mobile station and other known information.
- a transmission weight is calculated (step S102). Specifically, the weight calculation unit 21 is paired with the UL subframe so as to obtain a high transmission gain for the mobile station based on a reference signal or the like transmitted from the mobile station through the UL subframe.
- a transmission weight for the DL subframe is calculated.
- the baseband processing unit 30 demodulates the signal input from the weight calculation unit 21, separates the demodulation result for each mobile station, and outputs the result to the scheduler 40 (step S103).
- the scheduler 40 sets a mobile station to which a resource block is allocated from the reception data for each mobile station input from the baseband processing unit 30 (step S104).
- the radio resource allocation unit 50 allocates radio resources to the mobile station set by the scheduler 40 (Step S105). When the size of the transmission data to the mobile station exceeds the data size that can be transmitted by one resource block of one downlink subframe, the radio resource allocation unit 50 transmits the transmission data to a plurality of resource blocks of one downlink subframe. Assign.
- the radio resource allocation determination unit 60 refers to the allocation result of the radio resource allocation unit 50, and determines whether a pair of UL subframe and DL subframe is allocated to the mobile station (step S106). When a pair of a UL subframe and a DL subframe is allocated, the base station 1 can receive a reference signal necessary for adaptive array control from the mobile station. For this reason, the radio resource allocation determination unit 60 does not transmit an RS request creation instruction to the RS request creation unit 70. On the other hand, when there is a DL subframe to which a pair of UL subframe and DL subframe is not allocated, the base station 1 cannot receive a reference signal necessary for adaptive array control in the DL subframe from the mobile station. .
- the radio resource allocation determination unit 60 transmits an RS request creation instruction to the RS request creation unit 70.
- the RS request creation unit 70 creates an RS request for requesting the mobile station to transmit a reference signal (step S107).
- the baseband processing unit 30 outputs the transmission data to the mobile station input from the radio resource allocation unit 50 and the symbol string of the RS request input from the RS request creation unit 70 to the weight addition unit 22 (step S108).
- the weight addition unit 22 adds the transmission weight obtained by the weight calculation unit 21 to the signal input from the baseband unit 30, and outputs the signal to the radio communication unit 10 (step S109).
- the radio communication unit 10 converts the baseband frequency signal from the weight addition unit 22 into a carrier frequency, and transmits the signal to the mobile station through the array antenna ANT by adaptive array control (step S110).
- the RS request creation unit 70 when a pair of UL subframe and DL subframe is not assigned to the mobile station, the RS request creation unit 70 performs reference signal transmission using a reference signal region such as SRS of the UL subframe. Request the mobile station for transmission. For this reason, the base station 1 can receive an appropriate reference signal from a mobile station, and can perform appropriate AAS control by downlink communication.
- the radio resource allocation unit 50 When the size of transmission data to the mobile station exceeds the data size that can be transmitted by one resource block (wireless communication channel) of one downlink subframe, the radio resource allocation unit 50 The transmission data is allocated to the resource block. Thereby, since data transmission to the mobile station is completed by one downlink subframe, the base station 1 can complete the transmission of the RS request only once.
- the mobile station can also transmit reference signals using the reference signal region in one UL subframe, and the base station can also receive the reference signals from the mobile station together. This is also advantageous from the viewpoint of reducing the processing load of the station 1 and power consumption.
- the baseband processing unit 30 can be provided with the function of the AAS processing unit 20 for calculating and adding weights in AAS in the present embodiment.
- the functions included in each component, each step, etc. can be rearranged so that there is no logical contradiction, and multiple components, steps, etc. can be combined or divided into one. It is.
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Abstract
Description
時分割複信を採用して移動局と無線通信を行う、複数のアンテナを有する基地局であって、
前記移動局に無線通信チャネルを割り当てる割当部と、
前記割当部において、ダウンリンク通信用の下り無線通信チャネルと同一周波数帯のアップリンク通信用の上り無線通信チャネルが前記移動局に割り当てられていない場合、前記移動局に、前記下り無線通信チャネルと同一周波数帯の上り無線通信チャネルの参照信号領域を用いた参照信号送信を要求する要求部と、
前記参照信号を受信し、当該参照情報に基づき前記下り無線通信チャネルで無線信号を送信する際のウェイトを算出する算出部と、
を備えることを特徴とするものである。
前記割当部は、前記移動局への送信データのサイズが1つの下り無線通信チャネルで送信可能なデータサイズを超える場合、同一タイミングの複数の下り無線通信チャネルに前記送信データを割当てることを特徴とするものである。
通信フレームは、周波数方向に前記無線通信チャネルを複数含むとともに、当該通信フレームは、時間軸方向に、前記参照信号領域を有するアップリンク通信用の上りサブフレームと、ダウンリンク通信用の下りサブフレームとを含んでおり、
前記割当部は、前記上りサブフレームの前記上り無線通信チャネルと、前記下りサブフレームの前記下り無線通信チャネルとを前記移動局に割り当てることを特徴とするものである。
時分割複信を採用して移動局と無線通信を行う、複数のアンテナを有する基地局の通信方法であって、
前記移動局に無線通信チャネルを割り当てる割当ステップと、
ダウンリンク通信用の下り無線通信チャネルと同一周波数帯のアップリンク通信用の上り無線通信チャネルが前記移動局に割り当てられていない場合、前記移動局に、前記下り無線通信チャネルと同一周波数帯の上り無線通信チャネルの参照信号領域を用いた参照信号送信を要求する要求ステップと、
前記参照信号を受信し、当該参照情報に基づき前記下り無線通信チャネルで無線信号を送信する際のウェイトを算出する算出ステップと、
を有することを特徴とするものである。
前記割当ステップにおいて、前記移動局への送信データのサイズが1つの下り無線通信チャネルで送信可能なデータサイズを超える場合、同一タイミングの複数の下り無線通信チャネルに前記送信データを割当てることを特徴とするものである。
10 無線通信部
20 AAS処理部
21 ウェイト算出部
22 ウェイト付加部
30 ベースバンド処理部
40 スケジューラー
50 無線リソース割当部
60 無線リソース割当判定部
70 RS要求作成部
ANT アレイアンテナ
Claims (5)
- 時分割複信を採用して移動局と無線通信を行う、複数のアンテナを有する基地局であって、
前記移動局に無線通信チャネルを割り当てる割当部と、
前記割当部において、ダウンリンク通信用の下り無線通信チャネルと同一周波数帯のアップリンク通信用の上り無線通信チャネルが前記移動局に割り当てられていない場合、前記移動局に、前記下り無線通信チャネルと同一周波数帯の上り無線通信チャネルの参照信号領域を用いた参照信号送信を要求する要求部と、
前記参照信号を受信し、当該参照情報に基づき前記下り無線通信チャネルで無線信号を送信する際のウェイトを算出する算出部と、
を備えることを特徴とする基地局。 - 前記割当部は、前記移動局への送信データのサイズが1つの下り無線通信チャネルで送信可能なデータサイズを超える場合、同一タイミングの複数の下り無線通信チャネルに前記送信データを割当てることを特徴とする請求項1に記載の基地局。
- 通信フレームは、周波数方向に前記無線通信チャネルを複数含むとともに、当該通信フレームは、時間軸方向に、前記参照信号領域を有するアップリンク通信用の上りサブフレームと、ダウンリンク通信用の下りサブフレームとを含んでおり、
前記割当部は、前記上りサブフレームの前記上り無線通信チャネルと、前記下りサブフレームの前記下り無線通信チャネルとを前記移動局に割り当てることを特徴とする請求項1に記載の基地局。 - 時分割複信を採用して移動局と無線通信を行う、複数のアンテナを有する基地局の通信方法であって、
前記移動局に無線通信チャネルを割り当てる割当ステップと、
ダウンリンク通信用の下り無線通信チャネルと同一周波数帯のアップリンク通信用の上り無線通信チャネルが前記移動局に割り当てられていない場合、前記移動局に、前記下り無線通信チャネルと同一周波数帯の上り無線通信チャネルの参照信号領域を用いた参照信号送信を要求する要求ステップと、
前記参照信号を受信し、当該参照情報に基づき前記下り無線通信チャネルで無線信号を送信する際のウェイトを算出する算出ステップと、
を有することを特徴とする通信方法。 - 前記割当ステップにおいて、前記移動局への送信データのサイズが1つの下り無線通信チャネルで送信可能なデータサイズを超える場合、同一タイミングの複数の下り無線通信チャネルに前記送信データを割当てることを特徴とする請求項4に記載の通信方法。
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| US13/699,666 US8879495B2 (en) | 2010-05-27 | 2011-05-25 | Base station and communication method of base station |
| CN2011800254356A CN102907127A (zh) | 2010-05-27 | 2011-05-25 | 基站及基站的通信方法 |
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| JP2010121863A JP5530257B2 (ja) | 2010-05-27 | 2010-05-27 | 基地局、基地局の通信方法、移動局、移動局の通信方法 |
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| WO2014048265A1 (zh) * | 2012-09-25 | 2014-04-03 | 中兴通讯股份有限公司 | 一种控制信道处理方法和装置 |
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| JP5527231B2 (ja) * | 2011-01-21 | 2014-06-18 | 富士通株式会社 | 無線基地局、アンテナウェイト設定方法 |
| JP5690200B2 (ja) * | 2011-04-26 | 2015-03-25 | 京セラ株式会社 | 基地局 |
| WO2015042810A1 (en) | 2013-09-25 | 2015-04-02 | Nec(China)Co., Ltd. | Method and apparatus for uplink data transmission in a wireless communication system |
| CN104598477B (zh) * | 2013-10-31 | 2018-05-01 | 北大方正集团有限公司 | 一种确定新闻传播效果的方法和系统 |
| JP2020512764A (ja) * | 2017-03-31 | 2020-04-23 | 日本電気株式会社 | 端末、ネットワークデバイス、及び方法 |
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| WO2010053019A1 (ja) * | 2008-11-07 | 2010-05-14 | 住友電気工業株式会社 | 通信装置 |
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| JP2005102072A (ja) * | 2003-09-26 | 2005-04-14 | Sanyo Electric Co Ltd | 警告方法およびそれを利用した無線装置 |
| JP4890559B2 (ja) * | 2005-11-11 | 2012-03-07 | エルジー エレクトロニクス インコーポレイティド | 中継通信制御方法 |
| JP4924107B2 (ja) * | 2006-04-27 | 2012-04-25 | ソニー株式会社 | 無線通信システム、並びに無線通信装置及び無線通信方法 |
| KR101042790B1 (ko) * | 2007-04-05 | 2011-06-20 | 연세대학교 산학협력단 | 중계기를 사용하는 통신시스템에서의 데이터 송수신 방법및 장치 |
| US8055301B2 (en) * | 2007-08-06 | 2011-11-08 | Mitsubishi Electric Research Laboratories, Inc. | Wireless networks incorporating implicit antenna selection based on received sounding reference signals |
| JP5361865B2 (ja) * | 2008-04-04 | 2013-12-04 | パナソニック株式会社 | 無線通信移動局装置およびプレコーディング行列使用方法 |
| CN101674641B (zh) * | 2008-09-10 | 2012-02-08 | 中兴通讯股份有限公司 | 一种基于无线通信系统下行链路小区间干扰的控制方法 |
| CN101730115B (zh) * | 2008-10-24 | 2013-01-30 | 华为技术有限公司 | 中继传输的方法及设备 |
| US8320267B2 (en) * | 2009-06-23 | 2012-11-27 | Motorola Mobility Llc | Reference signal sounding for uplink pilot time slot in wireless communication system |
| US8611442B2 (en) * | 2010-04-06 | 2013-12-17 | Motorola Mobility Llc | Method and apparatus for channel sounding in an orthogonal frequency division multiplexing communication system |
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| WO2010053019A1 (ja) * | 2008-11-07 | 2010-05-14 | 住友電気工業株式会社 | 通信装置 |
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| WO2014048265A1 (zh) * | 2012-09-25 | 2014-04-03 | 中兴通讯股份有限公司 | 一种控制信道处理方法和装置 |
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| CN102907127A (zh) | 2013-01-30 |
| JP5530257B2 (ja) | 2014-06-25 |
| JP2011250184A (ja) | 2011-12-08 |
| US20130064147A1 (en) | 2013-03-14 |
| US8879495B2 (en) | 2014-11-04 |
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