WO2011136114A1 - データ送信方法、基地局装置及び移動局装置 - Google Patents
データ送信方法、基地局装置及び移動局装置 Download PDFInfo
- Publication number
- WO2011136114A1 WO2011136114A1 PCT/JP2011/059785 JP2011059785W WO2011136114A1 WO 2011136114 A1 WO2011136114 A1 WO 2011136114A1 JP 2011059785 W JP2011059785 W JP 2011059785W WO 2011136114 A1 WO2011136114 A1 WO 2011136114A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antennas
- station apparatus
- transmission
- mobile station
- base station
- Prior art date
Links
Images
Classifications
-
- 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
- H04B7/0413—MIMO systems
-
- 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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
-
- 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
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
-
- 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
- H04B7/0619—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 using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
-
- 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
- H04B7/0619—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 using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03375—Passband transmission
- H04L2025/03414—Multicarrier
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a data transmission method, a base station apparatus, and a mobile station apparatus, and more particularly, to a data transmission method, base station apparatus, and mobile station apparatus that support multi-antenna transmission.
- UMTS Universal Mobile Telecommunications System
- WSDPA High Speed Downlink Packet Access
- HSUPA High Speed Uplink Packet Access
- CDMA Wideband Code Division Multiple Access
- the third generation system can achieve a maximum transmission rate of about 2 Mbps on the downlink using generally a fixed bandwidth of 5 MHz.
- a maximum transmission rate of about 300 Mbps on the downlink and about 75 Mbps on the uplink can be realized using a variable band of 1.4 MHz to 20 MHz.
- LTE-A LTE Advanced
- LTE-A LTE Advanced
- a MIMO (Multi Input Multi Output) system has been proposed as a wireless communication technology that improves the data rate (frequency utilization efficiency) by transmitting and receiving data with multiple antennas (
- MIMO Multi Input Multi Output
- a MIMO system a plurality of transmission / reception antennas are prepared in a transmitter / receiver, and different transmission information sequences are transmitted simultaneously from different transmission antennas.
- the data rate frequency utilization efficiency
- the receiver side the data rate (frequency utilization efficiency) is increased by separating and detecting simultaneously transmitted information sequences using the fact that different fading fluctuations occur between transmission / reception antennas. Is possible.
- the above-described MIMO transmission is applied only to the downlink and not applied to the uplink.
- LTE-A system LTE-A system
- the base station apparatus eNodeB as a receiver appropriately grasps the number of transmission antennas of the mobile station apparatus UE as a transmitter (hereinafter referred to as “transmission antenna number” as appropriate).
- transmission antenna number the number of transmission antennas of the mobile station apparatus UE as a transmitter
- the base station apparatus eNodeB supports data communication using the number of transmission antennas, the data rate (frequency utilization efficiency) can be maximized.
- the base station apparatus eNodeB cannot properly grasp the number of transmission antennas, subsequent data communication may be disabled. Even when the number of transmission antennas can be properly grasped, if the base station apparatus eNodeB does not support data communication using the number of transmission antennas, the number of antennas included in the base station apparatus eNodeB is commensurate. Increasing the data rate can be difficult. From the viewpoint of increasing the data rate, even in such a case, data communication is performed with the number of transmission antennas that can increase the data rate most from the number of transmission antennas and the number of transmission antennas of the mobile station apparatus UE supported by the base station apparatus eNodeB. It is preferable to carry out.
- the present invention has been made in view of such a situation, and even when the number of transmission antennas of the mobile station apparatus is different from the number of transmission antennas of the mobile station apparatus supported by the base station apparatus, data at the time of MIMO transmission is provided. It is an object of the present invention to provide a data transmission method, a base station apparatus, and a mobile station apparatus that can increase the rate to the maximum.
- the data transmission method of the present invention includes a step of notifying the mobile station device of the maximum number of supported antennas of the mobile station device supported by the base station device, and the mobile station device transmitting the number of support antennas and the mobile station device.
- the step of selecting the smaller number of antennas as the number of pseudo antennas by comparing the number of antennas, the step of notifying the base station apparatus of the number of pseudo antennas, and the transmission of data channel signals according to the number of pseudo antennas are moved.
- the smaller number of antennas is selected as the number of pseudo antennas out of the number of transmission antennas of the mobile station device and the maximum number of supported antennas of the mobile station device supported by the base station device.
- a data channel signal is transmitted from the mobile station apparatus.
- data transmission can be performed with the number of pseudo antennas that can increase the data rate most effectively between the number of transmission antennas and the maximum number of support antennas of the mobile station apparatus supported by the base station apparatus.
- the data rate at the time of MIMO transmission can be increased to the maximum.
- the base station apparatus since the number of pseudo antennas is selected based on the number of transmission antennas included in the mobile station apparatus, the base station apparatus avoids a situation in which the number of transmission antennas cannot be properly grasped and subsequent data communication becomes impossible. It becomes possible.
- the base station apparatus of the present invention includes an antenna information transmitting means for transmitting the maximum number of supported antennas of the mobile station apparatus supported by the own apparatus to the mobile station apparatus, and among the number of support antennas and the number of transmission antennas of the mobile station apparatus.
- An antenna information receiving means for receiving from the mobile station device a number of pseudo antennas comprising the smaller number of antennas, and instruction information for instructing transmission of a data channel signal according to the number of pseudo antennas to the mobile station device
- an instruction information transmitting means for transmitting.
- the mobile station apparatus is notified of the maximum number of supported antennas of the mobile station apparatus supported by the base station apparatus, while instructing transmission of a data channel signal according to the number of pseudo antennas received from the mobile station apparatus. For transmitting the instruction information to the mobile station apparatus.
- the number of transmission antennas of the mobile station apparatus and the number of pseudo antennas composed of the smaller number of antennas among the maximum number of supported antennas of the mobile station apparatus supported by the base station apparatus.
- Data channel signals can be transmitted.
- data transmission can be performed with the number of pseudo antennas that can increase the data rate most effectively between the number of transmission antennas of the mobile station apparatus and the maximum number of support antennas of the mobile station apparatus supported by the base station apparatus. Therefore, even when the number of transmitting antennas of the mobile station apparatus is different from the maximum number of supporting antennas of the mobile station apparatus supported by the base station apparatus, it is possible to increase the data rate at the time of MIMO transmission to the maximum.
- the mobile station apparatus includes an antenna information receiving means for receiving the maximum number of support antennas of the own apparatus supported by the base station apparatus, and the smaller number of the support antennas compared to the number of transmission antennas of the own apparatus. Selection means for selecting the number of antennas as the number of pseudo antennas, antenna information transmitting means for transmitting the number of pseudo antennas to a base station apparatus, and instruction information for instructing transmission of a data channel signal according to the number of pseudo antennas An instruction information receiving means for receiving and a data transmitting means for transmitting a data channel signal in accordance with the number of pseudo antennas based on the instruction information are provided.
- the number of pseudo antennas configured by the smaller number of antennas among the maximum number of supported antennas of the mobile station device supported by the base station device and the number of transmission antennas of the mobile station device is transmitted to the base station device.
- the data channel signal is transmitted according to the number of pseudo antennas based on the instruction information for instructing the transmission of the data channel signal according to the number of pseudo antennas.
- the smaller number of antennas is selected as the number of pseudo antennas among the number of transmission antennas of the mobile station device and the maximum number of supported antennas of the mobile station device supported by the base station device.
- a data channel signal is transmitted from the mobile station apparatus.
- data transmission can be performed with the number of pseudo antennas that can increase the data rate most effectively between the number of transmission antennas and the maximum number of support antennas of the mobile station apparatus supported by the base station apparatus.
- the data rate at the time of MIMO transmission can be increased to the maximum.
- 1 is a conceptual diagram of a MIMO system to which a data transmission method according to the present invention is applied. It is a sequence diagram for demonstrating the data transmission method which concerns on the 1st (a) aspect of this invention. It is a sequence diagram for demonstrating the data transmission method which concerns on the 1st (b) aspect of this invention. It is a sequence diagram for demonstrating the data transmission method which concerns on the 1st (c) aspect of this invention. It is a sequence diagram for demonstrating the data transmission method which concerns on the 2nd aspect of this invention. It is a figure for demonstrating the structure of the mobile communication system which concerns on one embodiment of this invention. It is a block diagram which shows the structure of the mobile station apparatus which concerns on the said embodiment. It is a block diagram which shows the structure of the base station apparatus which concerns on the said embodiment.
- FIG. 1 is a conceptual diagram of a MIMO system to which a data transmission method according to the present invention is applied.
- the base station apparatus eNodeB and the mobile station apparatus UE are each provided with four antennas.
- the base station apparatus eNodeB measures the channel fluctuation amount using the received signal from each antenna, and based on the measured channel fluctuation quantity, the mobile station apparatus UE Select PMI (Precoding Matrix Indicator) and RI (Rank Indicator) according to the phase / amplitude control amount (precoding weight) that maximizes the throughput (or reception SINR) after combining the transmission data from each transmission antenna. . Then, the selected PMI and RI (or PMI including RI information) are fed back to the mobile station apparatus UE on the downlink together with transport block size information (TBS: Transport Block Size) corresponding to the channel quality.
- TBS Transport Block Size
- the signal separation / decoding unit 21 separates and decodes the control channel signal and the data channel signal included in the reception signals received via the reception antennas RX # 1 to RX # 4. .
- a data channel signal for the base station apparatus eNodeB is reproduced by performing a decoding process in the signal separation / decoding unit 21.
- the PMI selection unit 22 selects a PMI according to the channel state estimated by a channel estimation unit (not shown). At this time, the PMI selection unit 22 determines the known N precoding weights determined for each rank in both the mobile station apparatus UE and the base station apparatus eNodeB, and the PMI associated with the precoding matrix. The optimum PMI is selected from the code book 23.
- the RI selection unit 24 selects an RI according to the channel state estimated by the channel estimation unit. These PMI and RI are transmitted as feedback information to the mobile station apparatus UE together with the TBS.
- the precoding weight generation unit 11 generates a precoding weight based on the PMI and RI fed back from the base station apparatus eNodeB.
- the precoding multiplication unit 12 multiplies the transmission signal parallel-converted by the serial / parallel conversion unit (S / P) 13 by a precoding weight, thereby obtaining a phase / amplitude for each of the transmission antennas TX # 1 to TX # 4. Control (shift) each. As a result, the phase / amplitude-shifted transmission data is transmitted from the four transmission antennas TX # 1 to TX # 4.
- the base station device eNodeB In MIMO transmission (uplink MIMO transmission) performed in such an uplink, the base station device eNodeB needs to appropriately grasp the number of transmission antennas of the mobile station device UE. If the base station apparatus eNodeB cannot properly grasp the number of transmission antennas, subsequent data communication may be disabled. Alternatively, it can only operate in the single antenna transmission mode. However, in the LTE-A system, a method for the base station apparatus eNodeB to grasp the number of transmission antennas of the mobile station apparatus UE is not clearly defined.
- the base station device eNodeB needs to support data communication based on the number of transmission antennas of the mobile station device UE.
- the base station apparatus eNodeB does not support data communication based on the number of transmission antennas of the mobile station apparatus UE, it may be difficult to increase the data rate corresponding to the number of antennas included in the base station apparatus eNodeB.
- the mobile station apparatus UE to be communicated supports data communication using four antennas (hereinafter referred to as “4-antenna transmission”), whereas the base station apparatus eNodeB performs data communication using two antennas (hereinafter referred to as “2-antenna transmission”).
- 4-antenna transmission four antennas
- 2-antenna transmission two antennas
- a mode in which data communication is virtually performed by one antenna (hereinafter referred to as “1-antenna transmission mode”) is stipulated.
- 1-antenna transmission mode a mode in which data communication is virtually performed by one antenna
- the base station apparatus eNodeB supports only 2-antenna transmission
- data communication can be performed in the 1-antenna transmission mode. Conceivable.
- the data rate is significantly lower than the data rate obtained by two-antenna transmission that is possible with the base station apparatus eNodeB.
- the data rate is increased most from the number of transmission antennas of the mobile station apparatus UE and the maximum number of transmission antennas of the mobile station apparatus UE supported by the base station apparatus eNodeB. It is preferable to perform data communication with the number of possible transmission antennas.
- the present inventor is that the number of transmission antennas of the mobile station apparatus UE cannot be properly grasped as described above, and the subsequent data communication can be disabled. Focusing on the point that it is difficult to increase the data rate during MIMO transmission due to the difference from the number of transmission antennas of the mobile station apparatus UE supported by the eNodeB, the present invention has been achieved.
- the maximum number of support antennas is determined.
- the mobile station apparatus UE is notified.
- the number of support antennas notified from the base station apparatus eNodeB is compared with the number of transmission antennas of the mobile station apparatus UE (hereinafter referred to as “transmission antenna” as appropriate).
- transmission antenna the number of transmission antennas of the mobile station apparatus UE.
- the smaller number of antennas is selected as the number of pseudo antennas, and this number of pseudo antennas is notified to the base station apparatus eNodeB.
- the base station apparatus eNodeB instructs the mobile station apparatus UE to transmit a data channel signal according to the number of pseudo antennas notified from the mobile station apparatus UE.
- the mobile station apparatus UE transmits a data channel signal from the mobile station apparatus UE using the MIMO transmission technique according to the number of pseudo antennas.
- the number of transmission antennas of the mobile station apparatus UE, the maximum number of support antennas of the mobile station apparatus UE supported by the base station apparatus eNodeB (hereinafter referred to as “base station apparatus as appropriate”).
- the smaller number of antennas is selected as the number of pseudo antennas, and a data channel signal is transmitted from the mobile station apparatus UE according to the number of pseudo antennas.
- data transmission can be performed with the number of pseudo antennas that can increase the data rate most effectively between the number of transmission antennas and the maximum number of support antennas in the base station apparatus eNodeB.
- the base station apparatus eNodeB Even when the number is different from the number of antennas of the mobile station apparatus UE supported by the base station apparatus eNodeB, the data rate at the time of MIMO transmission can be increased to the maximum. In addition, since the number of pseudo antennas is selected based on the number of transmission antennas included in the mobile station apparatus UE, the base station apparatus eNodeB cannot properly grasp the number of transmission antennas and cannot perform subsequent data communication. It can be avoided.
- the maximum number of support antennas in the base station apparatus eNodeB is multiplexed with MIB (Master Information Block) information and transmitted.
- MIB Master Information Block
- SIB System Information Block
- the maximum number of support antennas in the base station apparatus eNodeB is multiplexed with the RRC signaling information and transmitted.
- FIG. 2 is a sequence diagram for explaining the data transmission method according to the first (a) aspect of the present invention.
- the data transmission method according to the first (a) aspect first, from the base station apparatus eNodeB, the largest number of support antennas in the base station apparatus eNodeB is multiplexed with the MIB information, and the mobile station apparatus It is transmitted to the UE (step (hereinafter referred to as “ST”) 11).
- the MIB information from the base station apparatus eNodeB is demodulated. And if the maximum number of support antennas in base station apparatus eNodeB is detected from MIB information, the comparison process which compares the said support antenna number with the number of transmission antennas of mobile station apparatus UE will be performed (ST12). As a result of this comparison processing, the smaller number of antennas is selected as the number of pseudo antennas N min out of the maximum number of support antennas and the number of transmission antennas in the base station apparatus eNodeB. Then, the selected number of pseudo antennas N min is notified to the base station apparatus eNodeB by an RRC message (ST13).
- the mobile station apparatus UE specifies the number of transmission antennas based on the content of UE capability indicating the performance information of the own apparatus.
- it may be specified based on the content of the UE category indicating the performance information of the own apparatus.
- the base station apparatus eNodeB When the notification of the number of pseudo antennas N min is received by the RRC message, the base station apparatus eNodeB performs a setting process required when performing uplink MIMO transmission using the number of pseudo antennas N min (ST14). In this setting processing, for example, processing such as selection of RI and PMI based on a code book corresponding to the number of pseudo antennas N min is performed. With this setting process, even when the maximum number of support antennas and the number of pseudo antennas N min are different, the data channel signal can be transmitted in the uplink using the number of pseudo antennas N min .
- an SRS (Sounding Reference Signal) setting instruction is multiplexed with the RRC signaling information and transmitted to the mobile station apparatus UE (ST15).
- an SRS setting instruction corresponding to the number of pseudo antennas N min is multiplexed with the RRC signaling information and transmitted.
- the SRS setting instruction constitutes instruction information for instructing transmission of a data channel signal (PUSCH: Physical Uplink Shared Channel) corresponding to the number of pseudo antennas N min .
- SRS corresponding to the pseudo-antenna number N min (number pseudo antennas N min content of SRS) is generated (ST16). Then, the generated SRS is transmitted from the transmission antenna corresponding to the number of pseudo antennas N min to the base station apparatus eNodeB (ST17).
- a channel state is estimated based on these SRSs, a PMI is selected according to the channel state, and a scheduling process for assigning radio resources (resource blocks) is performed (ST18). Then, these PMI and resource allocation information are transmitted to the mobile station apparatus UE (ST19). These PMI and resource allocation information are transmitted by a control channel signal (PDCCH: Physical Downlink Control Channel).
- PDCCH Physical Downlink Control Channel
- the mobile station apparatus UE When receiving these PMI and resource allocation information, the mobile station apparatus UE generates a precoding weight based on the PMI, and also uses a radio resource according to the resource allocation information and a data channel signal according to the number of pseudo antennas N min. (PUSCH) is transmitted to the base station apparatus eNodeB (ST20).
- PUSCH data channel signal
- the smaller number of antennas is selected as the number of pseudo antennas among the maximum number of support antennas and the number of transmission antennas in the base station apparatus eNodeB.
- a data channel signal (PUSCH) is transmitted from the mobile station apparatus UE according to the number of pseudo antennas.
- the operation when the number of transmission antennas of the mobile station apparatus UE is 4 antennas and the maximum number of support antennas in the base station apparatus eNodeB is 2 antennas will be described.
- information indicating that the maximum number of support antennas in the base station apparatus eNodeB is two antennas is multiplexed with the MIB information and transmitted to the mobile station apparatus UE (ST11).
- two antennas, which is the maximum number of support antennas in the base station apparatus eNodeB are compared with four antennas, which is the number of transmission antennas of the mobile station apparatus UE, and two antennas are selected as the number of pseudo antennas Nmin. (ST12).
- Two antennas as the number of pseudo antennas are notified to the base station apparatus eNodeB by an RRC message (ST13). Then, a setting process necessary when performing uplink MIMO transmission using two antennas having the number of pseudo antennas N min is performed (ST14). Furthermore, an SRS setting instruction corresponding to two antennas having the number of pseudo antennas N min is multiplexed with the RRC signaling information and transmitted to the mobile station apparatus UE (ST15).
- SRSs for two antennas having the number of pseudo antennas N min are generated (ST16), and these are transmitted to the base station apparatus eNodeB (ST17).
- a PMI is selected based on SRS for two antennas, which is the number of pseudo antennas N min , and a scheduling process is performed (ST18). Then, the selected PMI and resource allocation information are transmitted to the mobile station apparatus UE (ST19).
- a precoding weight is generated based on the received PMI, and a data channel signal (PUSCH) is transmitted based on two antennas having the number of pseudo antennas N min with radio resources according to the resource allocation information. It is transmitted to the station apparatus eNodeB (ST20).
- PUSCH data channel signal
- the smaller number of antennas is selected as the number of pseudo antennas (for example, two antennas)
- a data channel signal (PUSCH) is transmitted from the mobile station apparatus UE according to the number of pseudo antennas N min .
- data transmission can be performed with the number of pseudo antennas N min that can increase the data rate most effectively between the number of transmission antennas and the maximum number of support antennas in the base station apparatus eNodeB.
- the data rate during MIMO transmission can be maximized.
- the mobile station apparatus UE is notified by multiplexing and transmitting the maximum number of support antennas in the base station apparatus eNodeB to the MIB information.
- the mobile station apparatus UE can be notified of the maximum number of support antennas in the base station apparatus eNodeB at an early stage.
- FIG. 3 is a sequence diagram for explaining the data transmission method according to the first (b) aspect of the present invention.
- processes that are the same as those in FIG. 2 are given the same reference numerals, and descriptions thereof are omitted.
- the first (ST21) is the first (ST21) in that the largest number of support antennas in the base station apparatus eNodeB is multiplexed with the SIB information and transmitted. This is different from the data transmission method according to the aspect a).
- the mobile station apparatus UE demodulates SIB information from the base station apparatus eNodeB, and detects the maximum number of support antennas in the base station apparatus eNodeB included in the SIB information. Processing subsequent to the comparison processing using the detected number of support antennas is common to the data transmission method according to the first aspect (a).
- the data transmission can be performed with the number of pseudo antennas N min that can increase the data rate most effectively between the number of transmission antennas of the mobile station apparatus UE and the maximum number of support antennas of the base station apparatus eNodeB.
- the data rate at the time of MIMO transmission can be increased to the maximum.
- the mobile station apparatus UE is notified by multiplexing and transmitting the maximum number of supported antennas in the base station apparatus eNodeB to the SIB information.
- the mobile station apparatus UE can be notified of the maximum number of support antennas in the base station apparatus eNodeB at an early stage.
- FIG. 4 is a sequence diagram for explaining the data transmission method according to the first (c) aspect of the present invention.
- the processes common to those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted.
- the first (ST31) is the point at which the largest number of support antennas in the base station apparatus eNodeB is multiplexed with the RRC signaling information and transmitted (ST31). This is different from the data transmission method according to the aspect (a).
- the mobile station apparatus UE demodulates the RRC signaling information from the base station apparatus eNodeB, and detects the maximum number of support antennas in the base station apparatus eNodeB included in the RRC signaling information. Processing subsequent to the comparison processing using the detected number of support antennas is common to the data transmission method according to the first aspect (a).
- PUSCH data channel signal
- the maximum number of supported antennas in the base station apparatus eNodeB is notified to the mobile station apparatus UE by multiplexing and transmitting the RRC signaling information. It is possible to flexibly notify the mobile station apparatus UE of the maximum number of supported antennas in the base station apparatus eNodeB without being restricted by the amount of information or the like as compared with the case of multiplexing on information or SIB information.
- the mobile station apparatus UE notifies the base station apparatus eNodeB of the number of transmission antennas of the own apparatus, and the base station apparatus eNodeB transmits the transmission notified from the mobile station apparatus UE. It differs from the data transmission method according to the first aspect in that the number of antennas is compared with the maximum number of supported antennas in the base station apparatus eNodeB, and the smaller number of antennas is selected as the number of pseudo antennas. .
- the mobile station apparatus UE notifies the base station apparatus eNodeB of the number of transmission antennas of the own apparatus.
- the number of transmission antennas notified from the mobile station apparatus UE is compared with the maximum number of support antennas in the base station apparatus eNodeB. Of these, the smaller number of antennas is selected as the number of pseudo antennas.
- the base station apparatus eNodeB instructs the mobile station apparatus UE to transmit a data channel signal according to the number of pseudo antennas notified from the mobile station apparatus UE.
- the mobile station apparatus UE transmits a data channel signal from the mobile station apparatus UE using the MIMO transmission technique according to the number of pseudo antennas.
- FIG. 5 is a sequence diagram for explaining the data transmission method according to the second aspect of the present invention.
- the processes common to those in FIG. 2 are denoted by the same reference numerals and the description thereof is omitted.
- the mobile station apparatus UE notifies the base station apparatus eNodeB of the number of transmission antennas of the own apparatus by an RRC message (ST41).
- the base station apparatus eNodeB When the notification of the number of transmission antennas is received by the RRC message, the base station apparatus eNodeB performs comparison processing for comparing the number of transmission antennas with the maximum number of support antennas in the base station apparatus eNodeB (ST42). As a result of this comparison processing, the smaller number of antennas is selected as the number of pseudo antennas N min out of the number of transmission antennas and the maximum number of support antennas in the base station apparatus eNodeB. The processing after the setting processing using the selected number of pseudo antennas N min is common to the data transmission method according to the first aspect.
- the number is selected as the number of pseudo antennas, and a data channel signal (PUSCH) is transmitted from the mobile station apparatus UE according to the number of pseudo antennas.
- PUSCH data channel signal
- the data rate at the time of MIMO transmission can be increased to the maximum. Further, since the number of transmission antennas of the mobile station apparatus UE is notified, and the number of pseudo antennas is selected based on the number of transmission antennas, the subsequent data communication without properly grasping the number of transmission antennas of the mobile station apparatus UE It becomes possible to avoid the situation where it becomes impossible.
- the mobile station apparatus UE notifies the base station apparatus eNodeB of the number of transmission antennas of the own apparatus by an RRC message, and the base station apparatus eNodeB notifies the mobile station apparatus UE of the number of transmission antennas.
- the number of transmission antennas is compared with the maximum number of support antennas in the base station apparatus eNodeB, and the smaller number of antennas is selected as the number of pseudo antennas.
- it is not necessary to multiplex and transmit the maximum number of supported antennas in the base station apparatus eNodeB to MIB information or SIB information. Can be omitted.
- an SRS setting instruction is transmitted to the mobile station device UE based on the setting content. (ST15 shown in FIGS. 2 to 5).
- the mobile station apparatus UE when receiving the SRS setting instruction, the mobile station apparatus UE generates an SRS corresponding to the number of pseudo antennas N min (ST16 shown in FIGS. 2 to 5).
- the information amount (number of bits) of the SRS setting instruction may increase or decrease according to the setting content.
- a plurality of transmission modes for specifying the number of transmission antennas used for transmitting a data channel signal (PUSCH) are determined in advance, and the base station apparatus eNodeB and the mobile station It is conceivable that the transmission mode identification information is transmitted from the base station apparatus eNodeB to the mobile station apparatus UE as an SRS setting instruction.
- the transmission mode identification information is transmitted from the base station apparatus eNodeB to the mobile station apparatus UE as an SRS setting instruction.
- the single antenna transmission mode it is preferable to determine a 2-antenna transmission mode for performing 2-antenna transmission and a 4-antenna transmission mode for performing 4-antenna transmission.
- a 2-antenna transmission mode for performing 2-antenna transmission it is preferable to determine a 2-antenna transmission mode for performing 2-antenna transmission and a 4-antenna transmission mode for performing 4-antenna transmission.
- the 1-antenna transmission mode, the 2-antenna transmission mode, and the 4-antenna transmission mode it is possible to cope with various transmission modes performed in uplink MIMO transmission.
- the single antenna transmission mode since the single antenna transmission mode is included, the single antenna transmission mode defined in the LTE-A system can also be supported.
- the number of transmission antennas used for data transmission is determined until a data channel signal (PUSCH) is transmitted from the mobile station apparatus UE according to the number of pseudo antennas N min. It will be in a state that has not been done. For this reason, in the data transmission methods according to the first and second aspects, the data channel signal (PUSCH) is transmitted in the single antenna transmission mode until the mobile station apparatus UE transmits the data channel signal (PUSCH) according to the number of pseudo antennas N min. It is preferable that a signal be transmitted.
- PUSCH data channel signal
- FIG. 6 is a diagram for explaining a configuration of the mobile communication system 1 including the mobile station apparatus 10 and the base station apparatus 20 according to the embodiment of the present invention.
- the mobile communication system 1 shown in FIG. 6 is a system including, for example, an LTE system or SUPER 3G.
- the mobile communication system 1 may be called IMT-Advanced or 4G.
- the mobile communication system 1 includes a base station device 20 and a plurality of mobile station devices 10 (10 1 , 10 2 , 10 3 ,... 10 n , n communicating with the base station device 20. Is an integer of n> 0).
- the base station apparatus 20 is connected to the higher station apparatus 30, and the higher station apparatus 30 is connected to the core network 40.
- the mobile station device 10 communicates with the base station device 20 in the cell 50.
- the upper station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
- RNC radio network controller
- MME mobility management entity
- each mobile station apparatus (10 1 , 10 2 , 10 3 ,... 10 n ) has the same configuration, function, and state, the following description will be given as the mobile station apparatus 10 unless otherwise noted. Proceed. For convenience of explanation, it is assumed that the mobile station device 10 is in radio communication with the base station device 20, but more generally, user equipment (UE: User Equipment) including both a mobile terminal device and a fixed terminal device. It's okay.
- UE User Equipment
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
- SC-FDMA is a single carrier transmission method that reduces interference between terminals by dividing a system band into bands each consisting of one or continuous resource blocks for each terminal, and a plurality of terminals using different bands. .
- PDSCH shared by each mobile station device 10, downlink L1 / L2 control channel (PDCCH (Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) ) And are used.
- PDCH Physical Downlink Control Channel
- PCFICH Physical Control Format Indicator Channel
- PHICH Physical Hybrid-ARQ Indicator Channel
- User data that is, a normal data signal is transmitted by this PDSCH. Transmission data is included in this user data.
- the CC and scheduling information assigned to the mobile station device 10 by the base station device 20 are notified to the mobile station device 10 through the L1 / L2 control channel.
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- User data is transmitted by this PUSCH.
- CQI downlink radio quality information
- FIG. 7 is a block diagram showing a configuration of mobile station apparatus 10 according to the present embodiment.
- FIG. 8 is a block diagram showing a configuration of base station apparatus 20 according to the present embodiment.
- the configurations of the mobile station apparatus 10 and the base station apparatus 20 shown in FIGS. 7 and 8 are simplified to explain the present invention, and the configurations of the normal base station apparatus and the mobile station apparatus are respectively It shall be provided.
- FIGS. 7 and 8 show configurations of the mobile station apparatus 10 and the base station apparatus 20 to which the data transmission method according to the first aspect of the present invention is applied.
- the configurations of the mobile station apparatus 10 and the base station apparatus 20 to which the data transmission method according to the second aspect of the present invention is applied will be described focusing on differences from the configurations shown in FIGS. 7 and 8. .
- the transmission signals transmitted from the base station apparatus 20 are received by the antennas RX # 1 to RX # N and are transmitted to the transmission path by the duplexers 101 # 1 to 101 # N. After being electrically separated from the reception path, it is output to the RF reception circuits 102 # 1 to 102 # N.
- the RF receiving circuits 102 # 1 to 102 # N perform a frequency conversion process for converting a radio frequency signal into a baseband signal, and then a Fourier transform is performed by a fast Fourier transform unit (FFT unit) (not shown).
- FFT unit fast Fourier transform unit
- the time series signal is converted into a frequency domain signal.
- the received signal converted into the frequency domain signal is output to data channel signal demodulation section 103.
- the data channel signal demodulating unit 103 separates the received signal input from the FFT unit by, for example, a maximum likelihood detection (MLD) signal separation method.
- MLD maximum likelihood detection
- the channel estimation unit 104 estimates a channel state from the reference signal included in the reception signal output from the FFT unit, and notifies the data channel signal demodulation unit 103 and a channel information measurement unit 107 (to be described later) of the estimated channel state.
- Data channel signal demodulating section 103 separates the received signal by the above-described MLD signal separation method based on the notified channel state.
- the control channel signal demodulator 105 demodulates the control channel signal (PDCCH) output from the FFT unit. Then, the control information included in the control channel signal is notified to the data channel signal demodulation unit 103.
- Data channel signal demodulator 103 demodulates the extracted received signal for user k based on the notification content from control channel signal demodulator 105. Note that prior to the demodulation processing by the data channel signal demodulating unit 103, the extracted received signal regarding the user k is demapped by a subcarrier demapping unit (not shown) and returned to a time-series signal. .
- the received signal relating to user k demodulated by data channel signal demodulating section 103 is output to channel decoding section 106. Then, the channel decoding unit 106 performs channel decoding processing to reproduce the transmission signal #k.
- the maximum number of supported antennas N TX in the base station apparatus eNodeB is multiplexed with SIB information and RRC signaling information as in the data transmission methods according to the first (b) and first (c) aspects described above
- the maximum number of supported antennas N TX in the base station apparatus eNodeB is included in the reproduced transmission signal #k.
- the maximum number of support antennas N TX in the base station apparatus eNodeB is, for example, described later from the channel decoding unit 106.
- the data is output to the comparison unit 111.
- the reception system portion including the data channel signal demodulation unit 103 constitutes antenna information reception means for receiving the maximum number of supported antennas N TX in the base station apparatus eNodeB.
- the SRS setting instruction corresponding to the number of pseudo antennas is included in the signaling information of the reproduced transmission signal #k.
- This SRS setting instruction is output to a reference signal generator (not shown).
- an SRS corresponding to the number of pseudo antennas is generated according to the setting instruction.
- the SRS setting instruction constitutes instruction information for instructing transmission of data channel signals according to the number of pseudo antennas, and the number of pseudo antennas is set by the receiving system portion including the data channel signal demodulation unit 103.
- Instruction information receiving means for receiving instruction information for instructing transmission of the corresponding data channel signal is configured.
- control signal transmitted from the base station apparatus 20 includes PMI and resource allocation information.
- Control channel signal demodulation section 105 notifies PMI included in the control channel signal to precoding weight generation section 118 described later.
- control channel signal demodulation section 105 notifies resource allocation information included in the control channel signal to subcarrier mapping section 115 described later.
- the channel information measurement unit 107 measures channel information from the channel state notified from the channel estimation unit 104. Specifically, the channel information measurement unit 107 measures CQI based on the channel state notified from the channel estimation unit 104, selects PMI and RI corresponding to the CQI, and uses them to select the feedback control signal generation unit 108. Notify In addition, channel information measurement section 107 notifies selected PMI to precoding weight generation section 118 described later.
- Precoding weight generation section 118 generates precoding weights for antennas RX # 1 to RX # N from the PMI notified from control channel signal demodulation section 105 and the PMI selected by channel information measurement section 107. . Thereby, precoding weights corresponding to the number of pseudo antennas N min are generated. Precoding weight generation section 118 outputs the generated precoding weight to precoding multiplication section 116 described later.
- the feedback control signal generation unit 108 generates a control signal (for example, PUCCH) that feeds back these signals to the base station apparatus 20 based on the PMI, CQI, and RI notified from the channel information measurement unit 107.
- the control signal generated by the feedback control signal generation unit 108 is output to the multiplexer (MUX) 109.
- MUX multiplexer
- Broadcast channel signal demodulation section 110 demodulates the broadcast channel signal (PBCH) output from the FFT section. For example, when the maximum number of support antennas N TX in the base station apparatus eNodeB is multiplexed with the MIB information as in the data transmission method according to the first (a) aspect described above, the maximum number of support antennas in the base station apparatus eNodeB The number N TX is included in the broadcast channel signal. For this reason, when the data transmission method according to the first (a) mode is applied, the maximum number of support antennas N TX in the base station apparatus eNodeB is output from the broadcast channel signal demodulation unit 110 to the comparison unit 111 described later. Is done.
- PBCH broadcast channel signal
- broadcast information other than the maximum number of supported antennas N TX in the base station apparatus eNodeB is output to an upper layer (not shown).
- the reception system part including the broadcast channel signal demodulation unit 110 constitutes an antenna information reception unit that receives the maximum number of support antennas N TX in the base station apparatus eNodeB.
- the comparison unit 111 constitutes selection means, and is a channel decoding unit 106 (data transmission method according to the first (b) and first (c) modes) or a broadcast channel signal demodulation unit 110 (first (a ) Is compared with the maximum number of support antennas N TX in the base station apparatus eNodeB notified from the data transmission method according to the aspect).
- the number of transmission antennas of the mobile station device 10 is specified from UE capability information indicating the performance information of the mobile station device 10 and UE category information. Then, the smaller number of antennas is selected as the number of pseudo antennas N min out of the number of transmission antennas and the maximum number of support antennas N TX in the base station apparatus eNodeB. Then, the selected number of pseudo antennas N min is output to the data channel signal generation unit 112.
- transmission data #k related to user #k transmitted from the upper layer is output to data channel signal generation section 112.
- the data channel signal generation unit 112 generates an RRC control signal (RRC message) including the number of pseudo antennas N min output from the comparison unit 111. Then, data channel signal #k including this RRC control signal and transmission data #k is generated and output to channel coding section 113.
- the data channel signal #k from the data channel signal generation unit 112 is subjected to channel coding by the channel coding unit 113 and then data modulated by the data modulation unit 114.
- Data channel signal #k data-modulated by data modulator 114 is inverse Fourier transformed by a discrete Fourier transform unit (not shown), converted from a time-series signal to a frequency domain signal, and output to subcarrier mapping unit 115. Is done.
- Subcarrier mapping section 115 maps data channel signal #k to subcarriers according to schedule information instructed from base station apparatus 20 (resource allocation information notified from control channel signal demodulation section 105). At this time, the subcarrier mapping unit 115 maps (multiplexes) the reference signal #k generated by a reference signal generation unit (not shown) to the subcarrier together with the data channel signal #k. For example, the reference signal generation unit generates a reference signal #k (for example, SRS corresponding to the number of pseudo antennas N min ) corresponding to the SRS setting instruction received from the base station device 20. Data channel signal #k mapped to subcarriers in this way is output to precoding multiplication section 116.
- a reference signal #k for example, SRS corresponding to the number of pseudo antennas N min
- Precoding multiplication section 116 shifts the phase and / or amplitude of data channel signal #k for each of reception antennas RX # 1 to RX # N based on the precoding weight notified from precoding weight generation section 118. In this case, a precoding weight according to the number of pseudo antennas N min is notified from the precoding weight generation unit 118. For this reason, the precoding multiplier 116 can shift the phase and / or amplitude of the data channel signal #k according to the number of pseudo antennas N min . The data channel signal #k phase-shifted and / or amplitude-shifted by the precoding multiplier 116 is output to the multiplexer (MUX) 109.
- MUX multiplexer
- the multiplexer (MUX) 109 the phase and / or amplitude-shifted data channel signal #k and the control signal generated by the feedback control signal generator 108 are combined, and each of the antennas RX # 1 to RX # N is combined. A transmission signal is generated.
- the transmission signal generated by the multiplexer (MUX) 109 is subjected to inverse fast Fourier transform by an inverse fast Fourier transform unit (not shown) and converted from a frequency domain signal to a time domain signal, and then the RF transmission circuit 117 # 1. To 117 # N.
- the antennas RX # 1 to RX # N are passed through the duplexers 101 # 1 to 101 # N. And transmitted from the antennas RX # 1 to RX # N to the base station apparatus 20 through the uplink.
- the data channel signal #k is sent to the antenna RX # 1 ⁇ RX # base station apparatus 20 from the N in accordance with the pseudo-number of antennas N min by precoding weights generated by the precoding weight generation unit 118. That is, the transmission system portion including the precoding weight generation unit 118 constitutes a data transmission unit that transmits a data channel signal according to the number of pseudo antennas. Further, the data channel signal #k includes an RRC message including the number of pseudo antennas N min generated by the data channel signal generation unit 112. That is, the transmission system portion including the data channel signal generation unit 112 constitutes antenna information transmission means for transmitting the number of pseudo antennas N min to the base station apparatus 20.
- the smaller number of antennas among the maximum number of support antennas N TX in the base station apparatus eNodeB and the number of transmission antennas in the mobile station apparatus 10 is set to the number of pseudo antennas N. This is selected as min , and this number of pseudo antennas N min is transmitted to the base station apparatus 20 by an RRC control signal (RRC message).
- RRC message RRC control signal
- an SRS corresponding to the number of pseudo antennas N min is generated based on the SRS setting instruction received from the base station apparatus 20, and a data channel signal is transmitted based on the PMI and resource allocation information received from the base station apparatus 20.
- the data channel signal generation unit 112 since the mobile station device 10 multiplexes and transmits the number of transmission antennas included in the own device in the RRC control signal (RRC message), the data channel signal generation unit 112 The function differs from the mobile station apparatus 10 to which the data transmission method according to the first aspect is applied.
- the data channel signal generation unit 112 includes an RRC control signal including the number of transmission antennas of the own apparatus identified from UE capability information and UE category information ( RRC message). Then, data channel signal #k including this RRC control signal and transmission data #k is generated and output to channel coding section 113.
- the number of transmission antennas of the mobile station apparatus 10 is transmitted to the base station apparatus 20 by an RRC control signal (RRC message).
- RRC message an SRS corresponding to the number of pseudo antennas N min is generated based on the SRS setting instruction received from the base station apparatus 20, and a data channel signal is transmitted based on the PMI and resource allocation information received from the base station apparatus 20.
- data transmission can be performed from the mobile station apparatus 10 by the number of pseudo antennas N min that can increase the data rate most effectively between the maximum number of support antennas N TX and the number of transmission antennas in the base station apparatus eNodeB. .
- the number of transmission antennas of the mobile station apparatus 10 is different from the number of transmission antennas of the mobile station apparatus 10 supported by the base station apparatus 20, it is possible to maximize the data rate during MIMO transmission. .
- scheduler 201 assigns each resource based on channel quality (for example, received SINR) given from PMI selection / channel quality measurement sections 216 # 1 to 216 # k described later. Determine the user. Then, uplink resource allocation information (scheduling information) for each user is determined. Further, the scheduler 201 determines a TBS (Transport Block Size) based on channel quality information given from PMI selection / channel quality measurement units 216 # 1 to 216 # k, which will be described later, and will be described later together with resource allocation information, PMI, and RI.
- the control signal generators 208 # 1 to 208 # k of each user to be multiplexed with the downlink control signal (PDCCH).
- PDCH downlink control signal
- transmission data # 1 to #k including SIB information in which the maximum number of support antennas in the base station apparatus eNodeB is multiplexed are Generated. Then, these transmission data # 1 to #k are transmitted to corresponding channel coding sections 202 # 1 to 202 # k.
- a transmission means is configured.
- Transmission data # 1 to #k are channel-encoded by channel encoders 202 # 1 to 202 # k, and then output to data modulators 203 # 1 to 203 # k for data modulation.
- Transmission data # 1 to #k data-modulated by data modulators 203 # 1 to 203 # k are subjected to inverse Fourier transform by a discrete Fourier transform unit (not shown), and converted from a time-series signal to a frequency domain signal. It is output to the subcarrier mapping unit 204.
- Reference signal generators 205 # 1 to 205 # k generate individual reference signals (UE-specific RS) # 1 to #k for data channel demodulation for users # 1 to #k. Individual reference signals # 1 to #k generated by reference signal generation sections 205 # 1 to 205 # k are output to subcarrier mapping section 204.
- UE-specific RS individual reference signals
- transmission data # 1 to #k from data modulation sections 203 # 1 to 203 # k and individual reference signals # 1 to #k from reference signal generation sections 205 # 1 to 205 # k are mapped to subcarriers according to the schedule information given from the scheduler 201. Transmission data # 1 to #k mapped to subcarriers in this way are output to precoding multiplication sections 206 # 1 to 206 # k.
- Precoding multiplying sections 206 # 1 to 206 # k phase transmission data # 1 to #k for each of antennas TX # 1 to TX # N based on a precoding weight given from precoding weight generation section 219 described later. And / or amplitude shift (weighting of antennas TX # 1- # N by precoding). Transmission data # 1 to #k whose phases and / or amplitudes are shifted by precoding multipliers 206 # 1 to 206 # k are output to multiplexer (MUX) 207.
- MUX multiplexer
- Control signal generators 208 # 1 to 208 # k generate control signals (PDCCH) # 1 to #k based on the number of multiplexed users from scheduler 201.
- the control signals generated by the control signal generators 208 # 1 to 208 # k include the PMI and resource allocation information selected based on the SRS corresponding to the number of pseudo antennas N min arriving from the mobile station apparatus 10.
- Control signals (PDCCH) # 1 to #k generated by control signal generators 208 # 1 to 208 # k are output to multiplexer (MUX) 207.
- the RRC information generation unit 209 generates RRC signaling information.
- the RRC information generation unit 209 generates RRC signaling information including an SRS setting instruction for the mobile station apparatus 10 based on the number of pseudo antennas N min from the antenna number storage units 218 # 1 to 218 # k described later.
- the SRS setting instruction constitutes instruction information for instructing transmission of a data channel signal corresponding to the number of pseudo antennas N min , so that the number of pseudo antennas N is determined by the transmission system portion including this RRC information generation unit 209.
- An instruction information transmitting unit is configured to transmit instruction information for instructing transmission of a data channel signal corresponding to min to the mobile station apparatus 10.
- the RRC information generation unit 209 generates RRC signaling information in which the maximum number of support antennas in the base station apparatus 20 is multiplexed in the data transmission method according to the first (c) aspect described above.
- the transmission system part including the RRC information generation unit 209 constitutes an antenna information transmission unit that transmits the maximum number of support antennas in the base station apparatus eNodeB to the mobile station apparatus 10.
- the RRC signaling information generated by the RRC information generation unit 209 is output to the multiplexer (MUX) 207.
- the broadcast information generation unit 210 generates broadcast information (broadcast channel signal) to be broadcast to the mobile station apparatus 10.
- the broadcast information generation unit 210 includes broadcast information (broadcast channel signal) including MIB information in which the maximum number of support antennas in the base station apparatus 20 is multiplexed. Is generated.
- the transmission system part including the broadcast information generation unit 210 constitutes an antenna information transmission unit that transmits the maximum number of support antennas in the base station apparatus eNodeB to the mobile station apparatus 10.
- the notification information generated by the notification information generation unit 210 is output to the multiplexer (MUX) 207.
- MUX multiplexer
- the multiplexer (MUX) 207 In the multiplexer (MUX) 207, the phase and / or amplitude-shifted transmission data # 1 to #k, the PDCCHs # 1 to #k generated by the control signal generators 208 # 1 to 208 # k, and the RRC The RRC signaling information generated by the information generation unit 209 and the broadcast information generated by the broadcast information generation unit 210 are combined to generate a transmission signal for each of the transmission antennas TX # 1 to TX # N.
- the transmission signal generated by the multiplexer (MUX) 207 is subjected to inverse fast Fourier transform by an unillustrated inverse fast Fourier transform unit and converted from a frequency domain signal to a time domain signal, and then the RF transmission circuit 211 # 1. To 211 # N.
- the antennas TX # 1 to TX # N are passed through the duplexers 212 # 1 to 212 # N. And transmitted from the antennas TX # 1 to #N to the mobile station apparatus 10 on the downlink.
- the transmission signal transmitted from the mobile station apparatus 10 in the uplink is received by the antennas TX # 1 to #N, and is electrically transmitted to the transmission path and the reception path by the duplexers 212 # 1 to 212 # N.
- the RF receiving circuits 213 # 1 to 213 # N perform a frequency conversion process for converting a radio frequency signal into a baseband signal, and then a Fourier transform is performed by a fast Fourier transform unit (FFT unit) (not shown).
- FFT unit fast Fourier transform unit
- the time series signal is converted into a frequency domain signal.
- the received signals converted into these frequency domain signals are output to data channel signal demultiplexing sections 214 # 1 to 214 # k.
- Data channel signal demultiplexing sections 214 # 1 to 214 # k demultiplex the received signals input from the FFT section by, for example, a maximum likelihood detection (MLD) signal demultiplexing method.
- MLD maximum likelihood detection
- RS channel estimation sections 215 # 1 to 215 # k estimate a channel state (DMRS channel estimation value) from a DMRS (Demodulate RS) signal included in the reception signal output from the FFT section, and use the DMRS channel estimation value as data.
- RS channel estimation sections 215 # 1 to 215 # k estimate the channel state (SRS channel estimation value) from the SRS signal included in the received signal, and use this SRS channel estimation value as the PMI selection / channel quality measurement section 216 #. 1 to 216 # k are notified. In this case, SRS channel estimate in accordance with the pseudo-number of antennas N min is notified to the PMI selection / channel quality measuring section 216 # 1 ⁇ 216 # k.
- Data channel signal demultiplexing sections 214 # 1 to 214 # k demultiplex the received signal by the MLD signal demultiplexing method described above based on the DMRS channel estimation values notified from RS channel estimation sections 215 # 1 to 215 # k. .
- the received signals related to user # 1 to user #k separated by data channel signal separation sections 214 # 1 to 214 # k are demapped by a subcarrier demapping section (not shown) and returned to a time-series signal. Thereafter, the data is demodulated by a data demodulator (not shown). Then, the channel decoding units 217 # 1 to 217 # k perform channel decoding processing to reproduce the transmission signals # 1 to #k.
- the reproduced transmission signals # 1 to #k include the number of pseudo antennas N min in the RRC message.
- the number of pseudo antennas N min is output from, for example, the channel decoding units 217 # 1 to 217 # k to the antenna number accumulating units 218 # 1 to 218 # k described later.
- an antenna information receiving means for receiving the number of pseudo antennas N min from the mobile station apparatus 10 is configured by the reception system portion including the data channel signal separation unit 214 that separates the transmission signals # 1 to #k including the RRC message. .
- PMI selection / channel quality measurement sections 216 # 1 to 216 # k measure the channel quality based on the SRS channel estimation values notified from RS channel estimation sections 215 # 1 to 215 # k, and the measured channel quality PMI is selected according to the above.
- the channel quality and PMI measured or selected by the PMI selection / channel quality measurement units 216 # 1 to 216 # k are output to the scheduler 201.
- resource allocation information is determined based on the channel quality and PMI output from the PMI selection / channel quality measurement units 216 # 1 to 216 # k.
- Antenna number accumulating sections 218 # 1 to 218 # k accumulate the number of pseudo antennas N min notified from channel decoding sections 217 # 1 to 217 # k.
- the antenna number storage units 218 # 1 to 218 # k the number of pseudo antennas N min applied to the mobile station apparatuses 10 # 1 to 10 # k are stored.
- the number of pseudo antennas N min stored in the antenna number storage units 218 # 1 to 218 # k is output to the RRC information generation unit 209 as appropriate.
- RRC signaling information including an SRS setting instruction is generated based on the number of pseudo antennas N min given from the antenna number storage units 218 # 1 to 218 # k.
- the precoding weight generation unit 219 generates a precoding weight indicating the phase and / or amplitude shift amount for the transmission data # 1 to #k. Each generated precoding weight is output to precoding multipliers 206 # 1 to 206 # k, and is used for precoding transmission data # 1 to transmission data #k.
- base station apparatus 20 notifies mobile station apparatus 10 of the maximum number of support antennas in base station apparatus 20.
- an SRS setting instruction according to the number of pseudo antennas N min notified from the mobile station device 10 is transmitted to the mobile station device 10, and the PMI and resource allocation information according to the number of pseudo antennas N min are transmitted to the mobile station device 10.
- the mobile station apparatus 10 according to the number of pseudo antennas N min composed of the smaller number of antennas among the number of transmission antennas of the mobile station apparatus 10 and the maximum number of support antennas in the base station apparatus 20.
- Data channel signals can be transmitted.
- data transmission can be performed with the number of pseudo antennas that can increase the data rate most effectively between the number of transmission antennas of the mobile station apparatus 10 and the maximum number of support antennas in the base station apparatus 20. Even when the number of transmission antennas of the device 10 is different from the maximum number of support antennas in the base station device 20, it is possible to maximize the data rate during MIMO transmission.
- the number of transmission antennas is multiplexed with the RRC control signal (RRC message) and transmitted from the mobile station apparatus 10, and the number of pseudo antennas N min is determined based on the number of transmission antennas. It is selected by the base station device 20. For this reason, in the base station apparatus 20 to which the data transmission method according to the second aspect is applied, the information stored in the antenna storage units 218 # 1 to 218 # k and the number of pseudo antennas N min are selected. Is different from the base station apparatus 20 to which the data transmission method according to the first aspect is applied.
- transmission signals # 1 reproduced by channel decoding sections 217 # 1 to 217 # k are provided to antenna storage sections 218 # 1 to 218 # k.
- the number of transmission antennas of mobile station apparatuses 10 # 1 to 10 # k included in .about. # K is stored.
- the number of transmission antennas is compared with the maximum number of support antennas in the base station apparatus 20, and the number of pseudo antennas N min is set.
- a comparison unit is added as selection means for selection.
- the comparison unit outputs the selected number of pseudo antennas N min to the RRC information generation unit 209.
- the RRC information generation unit 209 generates RRC signaling information including the number of pseudo antennas N min as in the base station station apparatus 20 to which the data transmission method according to the first aspect is applied, and a multiplexer (MUX) 207 Output to.
- MUX multiplexer
- the number of pseudo antennas N min is selected based on the number of transmission antennas notified from the mobile station apparatus 10, and the number of pseudo antennas N min is set.
- a corresponding SRS setting instruction is transmitted to the mobile station apparatus 10, and PMI and resource allocation information corresponding to the number of pseudo antennas N min are transmitted to the mobile station apparatus 10.
- the number of transmission antennas of the mobile station apparatus 10 and the maximum number of support antennas in the base station apparatus 20 are compared with the mobile station apparatus 10.
- the data channel signal can be transmitted according to the number of pseudo antennas N min composed of the smaller number of antennas.
- data transmission can be performed with the number of pseudo antennas that can increase the data rate most effectively between the number of transmission antennas of the mobile station apparatus 10 and the maximum number of support antennas in the base station apparatus 20. Even when the number of transmission antennas of the device 10 is different from the maximum number of support antennas in the base station device 20, it is possible to maximize the data rate during MIMO transmission.
- the smaller number of antennas is selected as the number of pseudo antennas among the number of transmission antennas of the mobile station device 10 and the maximum number of support antennas of the base station device 20. Then, a data channel signal is transmitted from the mobile station apparatus 10 according to the number of pseudo antennas. Thereby, since data transmission can be performed with the number of pseudo antennas that can increase the data rate most effectively between the number of transmission antennas and the maximum number of support antennas in the base station apparatus 20, the number of transmission antennas is Even when the number of transmission antennas of the mobile station apparatus 10 supported by the apparatus 20 is different, the data rate at the time of MIMO transmission can be maximized.
- the base station apparatus 20 since the number of pseudo antennas is selected based on the number of transmission antennas included in the mobile station apparatus 10, the base station apparatus 20 cannot properly grasp the number of transmission antennas. It becomes possible to avoid a situation in which subsequent data communication becomes impossible.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
Description
Claims (17)
- 基地局装置がサポートする移動局装置の最多のサポートアンテナ数を当該移動局装置に通知するステップと、移動局装置にて前記サポートアンテナ数と当該移動局装置の送信アンテナ数とを比較して少ない方のアンテナ数を疑似アンテナ数として選択するステップと、前記疑似アンテナ数を基地局装置に通知するステップと、前記疑似アンテナ数に応じたデータチャネル信号の送信を移動局装置に指示するステップと、前記疑似アンテナ数に応じて移動局装置からデータチャネル信号を送信するステップとを具備することを特徴とするデータ送信方法。
- 前記サポートアンテナ数をMIB(Master Information Block)情報に多重して移動局装置に送信し、前記疑似アンテナ数をRRCメッセージにより基地局装置に通知し、前記疑似アンテナ数に応じたデータチャネル信号の送信を指示するための指示情報をRRCシグナリング情報に多重して移動局装置に送信することを特徴とする請求項1記載のデータ送信方法。
- 前記サポートアンテナ数をSIB(System Information Block)情報に多重して移動局装置に送信し、前記疑似アンテナ数をRRCメッセージにより基地局装置に通知し、前記疑似アンテナ数に応じたデータチャネル信号の送信を指示するための指示情報をRRCシグナリング情報に多重して移動局装置に送信することを特徴とする請求項1記載のデータ送信方法。
- 前記サポートアンテナ数をRRCシグナリング情報に多重して移動局装置に送信し、前記疑似アンテナ数をRRCメッセージにより基地局装置に通知し、前記疑似アンテナ数に応じたデータチャネル信号の送信を指示するための指示情報をRRCシグナリング情報に多重して移動局装置に送信することを特徴とする請求項1記載のデータ送信方法。
- 前記サポートアンテナ数を移動局装置で保持される性能情報に含まれる前記送信アンテナ数と比較して前記疑似アンテナ数を選択することを特徴とする請求項1記載のデータ送信方法。
- データチャネル信号の送信に用いる前記送信アンテナ数を特定する複数の送信モードを定めておき、前記指示情報として前記疑似アンテナ数に対応する前記送信モードを移動局装置に送信することを特徴とする請求項2から請求項4のいずれかに記載のデータ送信方法。
- 前記送信モードに、データチャネル信号の送信に1送信アンテナを用いる1アンテナ送信モードとデータチャネル信号の送信に2送信アンテナを用いる2アンテナ送信モードと、データチャネル信号の送信に4送信アンテナを用いる4アンテナ送信モードとを定めることを特徴とする請求項6記載のデータ送信方法。
- 移動局装置が前記疑似アンテナ数に応じてデータチャネル信号を送信するまで前記1送信アンテナモードでデータチャネル信号を送信することを特徴とする請求項7記載のデータ送信方法。
- 移動局装置の送信アンテナ数を基地局装置に通知するステップと、基地局装置にて前記送信アンテナ数と当該基地局装置がサポートする移動局装置の最多のサポートアンテナ数とを比較して少ない方のアンテナ数を疑似アンテナ数として選択するステップと、前記疑似アンテナ数に応じたデータチャネル信号の送信を移動局装置に指示するステップと、前記疑似アンテナ数に応じて移動局装置からデータチャネル信号を送信するステップとを具備することを特徴とするデータ送信方法。
- 前記送信アンテナ数をRRCメッセージにより基地局装置に通知する一方、前記疑似アンテナ数に応じたデータチャネル信号の送信を指示するための指示情報をRRCシグナリング情報に多重して移動局装置に送信することを特徴とする請求項9記載のデータ送信方法。
- データチャネル信号の送信に用いる前記送信アンテナ数を特定する複数の送信モードを定めておき、前記指示情報として前記疑似アンテナ数に対応する前記送信モードを移動局装置に送信することを特徴とする請求項10記載のデータ送信方法。
- 前記送信モードに、データチャネル信号の送信に1送信アンテナを用いる1アンテナ送信モードとデータチャネル信号の送信に2送信アンテナを用いる2アンテナ送信モードと、データチャネル信号の送信に4送信アンテナを用いる4アンテナ送信モードとを定めることを特徴とする請求項11記載のデータ送信方法。
- 移動局装置が前記疑似アンテナ数に応じてデータチャネル信号を送信するまで前記1送信アンテナモードでデータチャネル信号を送信することを特徴とする請求項12記載のデータ送信方法。
- 自装置がサポートする移動局装置の最多のサポートアンテナ数を当該移動局装置に送信するアンテナ情報送信手段と、前記サポートアンテナ数と移動局装置の送信アンテナ数のうち、少ない方のアンテナ数で構成される疑似アンテナ数を移動局装置から受信するアンテナ情報受信手段と、前記疑似アンテナ数に応じたデータチャネル信号の送信を指示するための指示情報を移動局装置に送信する指示情報送信手段とを具備することを特徴とする基地局装置。
- 移動局装置の送信アンテナ数を受信するアンテナ情報受信手段と、前記送信アンテナ数と自装置がサポートする移動局装置の最多のサポートアンテナ数とを比較して少ない方のアンテナ数を疑似アンテナ数として選択する選択手段と、前記疑似アンテナ数に応じたデータチャネル信号の送信を指示するための指示情報を移動局装置に送信する指示情報送信手段とを具備することを特徴とする基地局装置。
- 基地局装置がサポートする自装置の最多のサポートアンテナ数を受信するアンテナ情報受信手段と、前記サポートアンテナ数と自装置の送信アンテナ数とを比較して少ない方のアンテナ数を疑似アンテナ数として選択する選択手段と、前記疑似アンテナ数を基地局装置に送信するアンテナ情報送信手段と、前記疑似アンテナ数に応じたデータチャネル信号の送信を指示するための指示情報を受信する指示情報受信手段と、前記指示情報に基づいて前記疑似アンテナ数に応じてデータチャネル信号を送信するデータ送信手段とを具備することを特徴とする移動局装置。
- 自装置の送信アンテナ数を基地局装置に送信するアンテナ情報送信手段と、前記送信アンテナ数と基地局装置がサポートする移動局装置の最多のサポートアンテナ数のうち、少ない方のアンテナ数で構成される疑似アンテナ数を用いたデータチャネル信号の送信を指示するための指示情報を受信する指示情報受信手段と、前記指示情報に基づいて前記疑似アンテナ数に応じてデータチャネル信号を送信するデータ送信手段とを具備することを特徴とする移動局装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11774897A EP2566216A1 (en) | 2010-04-30 | 2011-04-21 | Data transmitting method, base station apparatus and mobile station apparatus |
US13/643,467 US8848646B2 (en) | 2010-04-30 | 2011-04-21 | Data transmitting method, base station apparatus and mobile station apparatus |
CN2011800217516A CN102860061A (zh) | 2010-04-30 | 2011-04-21 | 数据发送方法、基站装置以及移动台装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010105398A JP5291663B2 (ja) | 2010-04-30 | 2010-04-30 | データ送信方法、基地局装置及び移動局装置 |
JP2010-105398 | 2010-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011136114A1 true WO2011136114A1 (ja) | 2011-11-03 |
Family
ID=44861420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/059785 WO2011136114A1 (ja) | 2010-04-30 | 2011-04-21 | データ送信方法、基地局装置及び移動局装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8848646B2 (ja) |
EP (1) | EP2566216A1 (ja) |
JP (1) | JP5291663B2 (ja) |
CN (1) | CN102860061A (ja) |
WO (1) | WO2011136114A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140269409A1 (en) * | 2013-03-14 | 2014-09-18 | Telefonaktiebolaget L M Ericsson (Publ) | Explicit signaling of number of receiver antennas |
JP2015504631A (ja) * | 2011-11-14 | 2015-02-12 | 京セラ株式会社 | マクロセル通信リソースを使用する端末間サウンディング参照信号の送信 |
US20150065153A1 (en) * | 2012-04-13 | 2015-03-05 | Nokia Corporation | Arrangement for Enhanced Multi-Transmit Antenna Sounding |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9337982B2 (en) * | 2013-04-05 | 2016-05-10 | Qualcomm Incorporated | Adaptive antenna management in LTE |
EP3179796B1 (en) * | 2014-08-30 | 2021-06-23 | Huawei Technologies Co., Ltd. | Antenna information transmission and reception method and device |
JP6481292B2 (ja) * | 2014-09-03 | 2019-03-13 | 株式会社ソシオネクスト | 受信回路及び受信方法 |
CN105472755B (zh) * | 2014-09-10 | 2019-02-05 | 联想(北京)有限公司 | 一种天线分配方法、装置和电子设备 |
US9867175B2 (en) * | 2014-12-03 | 2018-01-09 | Qualcomm Incorporated | Transmit antenna diversity scheme |
US10425922B2 (en) | 2016-02-20 | 2019-09-24 | Qualcomm Incorporated | Communication of uplink control information |
US10397904B2 (en) | 2016-02-20 | 2019-08-27 | Qualcomm Incorporated | Communication of uplink control information |
US10631159B2 (en) * | 2016-09-01 | 2020-04-21 | Qualcomm Incorporated | UE capability reporting for dual-polarization wireless communication |
MX2019013114A (es) | 2017-05-04 | 2019-12-16 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Metodo para determinar parametros de transmision de se?al de enlace ascendente terminal y dispositivo de red. |
CN108199726B (zh) * | 2018-03-16 | 2020-08-28 | Oppo广东移动通信有限公司 | 多路选择开关及相关产品 |
CN110324884B (zh) * | 2018-03-30 | 2021-04-06 | 维沃移动通信有限公司 | 传输模式确定方法及设备 |
CN115085773A (zh) * | 2021-03-10 | 2022-09-20 | 中兴通讯股份有限公司 | 一种天线数目变更方法、装置、设备和存储介质 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006180320A (ja) * | 2004-12-24 | 2006-07-06 | Toshiba Corp | 無線通信装置 |
JP2007028569A (ja) * | 2005-03-31 | 2007-02-01 | Ntt Docomo Inc | 無線通信装置及び無線通信方法 |
JP2009253397A (ja) * | 2008-04-02 | 2009-10-29 | Nec Corp | 移動体通信システム、通信装置及びそれらに用いる仕様書のバージョン情報通知方法 |
JP2009273139A (ja) * | 2009-06-24 | 2009-11-19 | Ntt Docomo Inc | 位置登録処理方法及び移動局 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100392995C (zh) * | 2004-11-17 | 2008-06-04 | 中兴通讯股份有限公司 | 一种多发送天线多接收天线系统中下行链路多用户调度方法 |
RU2408988C2 (ru) * | 2005-03-31 | 2011-01-10 | Нтт Досомо, Инк. | Устройство и способ радиосвязи |
WO2007006174A1 (fr) * | 2005-07-08 | 2007-01-18 | Zte Corporation | Procédé d’allocation de canal dans un système de communication mobile wcdma |
US8547954B2 (en) * | 2008-08-28 | 2013-10-01 | Qualcomm Incorporated | Methods and apparatus of adapting number of advertised transmit antenna ports |
WO2010048178A1 (en) * | 2008-10-20 | 2010-04-29 | Interdigital Patent Holdings, Inc. | Carrier aggregation |
US8982759B2 (en) * | 2009-01-15 | 2015-03-17 | Lg Electronics Inc. | System information transmitting and receiving device |
US8571319B2 (en) * | 2009-07-28 | 2013-10-29 | International Business Machines Corporation | Enhanced screen capture for form manipulation |
US8964657B2 (en) * | 2009-11-02 | 2015-02-24 | Qualcomm Incorporated | Apparatus and method for joint encoding of user specific reference signal information in wireless communication |
-
2010
- 2010-04-30 JP JP2010105398A patent/JP5291663B2/ja not_active Expired - Fee Related
-
2011
- 2011-04-21 EP EP11774897A patent/EP2566216A1/en not_active Withdrawn
- 2011-04-21 CN CN2011800217516A patent/CN102860061A/zh active Pending
- 2011-04-21 WO PCT/JP2011/059785 patent/WO2011136114A1/ja active Application Filing
- 2011-04-21 US US13/643,467 patent/US8848646B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006180320A (ja) * | 2004-12-24 | 2006-07-06 | Toshiba Corp | 無線通信装置 |
JP2007028569A (ja) * | 2005-03-31 | 2007-02-01 | Ntt Docomo Inc | 無線通信装置及び無線通信方法 |
JP2009253397A (ja) * | 2008-04-02 | 2009-10-29 | Nec Corp | 移動体通信システム、通信装置及びそれらに用いる仕様書のバージョン情報通知方法 |
JP2009273139A (ja) * | 2009-06-24 | 2009-11-19 | Ntt Docomo Inc | 位置登録処理方法及び移動局 |
Non-Patent Citations (1)
Title |
---|
3GPP: ""Requirements for Evolved UTRA and Evolved UTRAN"(3GPPTR25.913)", 3GPP |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015504631A (ja) * | 2011-11-14 | 2015-02-12 | 京セラ株式会社 | マクロセル通信リソースを使用する端末間サウンディング参照信号の送信 |
US20150065153A1 (en) * | 2012-04-13 | 2015-03-05 | Nokia Corporation | Arrangement for Enhanced Multi-Transmit Antenna Sounding |
US20140269409A1 (en) * | 2013-03-14 | 2014-09-18 | Telefonaktiebolaget L M Ericsson (Publ) | Explicit signaling of number of receiver antennas |
Also Published As
Publication number | Publication date |
---|---|
JP2011234298A (ja) | 2011-11-17 |
EP2566216A1 (en) | 2013-03-06 |
US8848646B2 (en) | 2014-09-30 |
JP5291663B2 (ja) | 2013-09-18 |
US20130083757A1 (en) | 2013-04-04 |
CN102860061A (zh) | 2013-01-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5291663B2 (ja) | データ送信方法、基地局装置及び移動局装置 | |
JP5706528B2 (ja) | 無線基地局、ユーザ端末、無線通信システム及び無線通信方法 | |
JP5291664B2 (ja) | データ送信方法、基地局装置及び移動局装置 | |
JP5753022B2 (ja) | 無線通信システム、無線基地局装置、ユーザ端末及び無線通信方法 | |
JP5325672B2 (ja) | 基地局装置及び情報フィードバック方法 | |
JP5809482B2 (ja) | 無線通信システム、無線基地局及び無線通信方法 | |
JP5388356B2 (ja) | プリコーディングウェイト生成方法、移動局装置及び基地局装置 | |
WO2012023500A1 (ja) | 移動端末装置及び無線通信方法 | |
EP2882123A1 (en) | Base station, user equipment, communication system and communication control method | |
WO2011083796A1 (ja) | 基地局装置、移動局装置及び制御情報送信方法 | |
WO2014021010A1 (ja) | 基地局装置、ユーザ端末、通信システム及び通信制御方法 | |
JP5268983B2 (ja) | 通信制御方法、移動局装置及び基地局装置 | |
WO2012046688A1 (ja) | フィードバック方法、移動端末装置及び無線基地局装置 | |
JP5373650B2 (ja) | 移動局装置、チャネル情報フィードバック方法 | |
JP2018078593A (ja) | 基地局装置、ユーザ端末及び無線通信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180021751.6 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11774897 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 9132/CHENP/2012 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011774897 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13643467 Country of ref document: US |