WO2011016232A1 - 無線通信装置、信号中継方法、および信号割当方法 - Google Patents
無線通信装置、信号中継方法、および信号割当方法 Download PDFInfo
- Publication number
- WO2011016232A1 WO2011016232A1 PCT/JP2010/004912 JP2010004912W WO2011016232A1 WO 2011016232 A1 WO2011016232 A1 WO 2011016232A1 JP 2010004912 W JP2010004912 W JP 2010004912W WO 2011016232 A1 WO2011016232 A1 WO 2011016232A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- subframe
- station
- signal
- base station
- relay
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0097—Relays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
Definitions
- the present invention relates to a wireless communication device, a signal relay method, and a signal allocation method.
- a wireless communication relay station device 20 (hereinafter abbreviated as relay station 20) is installed, and communication (arrows C and D in FIG. 13) between the base station 10 and the mobile station 2 is performed via the relay station 20.
- the relay transmission technology to be performed is being studied. If the relay technology is used, a terminal (mobile station) that cannot directly communicate with the base station 10 can communicate with the base station 10 via the relay station 20.
- TD relay in the downlink (Down Link: DL), transmission from the base station 10 to the relay station 20 and transmission from the relay station 20 to the mobile station 2 are divided by time. Also, in uplink (Up Link: UL), transmission from the mobile station 2 to the relay station 20 and transmission from the relay station 20 to the base station 10 are divided by time. In this way, by dividing the backhaul communication between the base station and the relay station and the access link communication between the relay station 20 and the mobile station 2 on the time axis, the relay station 20 The transmission time and the reception time can be divided. Therefore, the relay station 20 can relay without being affected by the sneak current between the transmission antenna and the reception antenna.
- [Use of MBSFN subframe] In LTE-A, in order to maintain mutual compatibility with LTE, it is considered to set an MBSFN subframe in DL at the time of transmission from a base station to a relay station. However, since the LTE mobile station does not have a function of receiving MBMS data, only the control signal portion is received in the MBSFN subframe, and the other data portions are ignored. MBMS data may be transmitted from multiple base stations. Therefore, there is a possibility that the LTE mobile station cannot correctly measure the reception quality of the base station to which the mobile station is connected. Therefore, the LTE mobile station does not measure the reception quality in the MBSFN subframe.
- an LTE mobile station sets a subframe to be communicated with a base station as an MBSFN subframe in the cell of the relay station, using the feature that the data portion of the MBSFN subframe is not received.
- the mobile station connected to the relay station measures the reception quality in the subframe in which the relay station stops transmission in order to receive a signal from the base station, even though there is no transmission. You can avoid that.
- the MBSFN subframe used for backhaul uses a subframe in which MBMS data is actually sent, and an MBSFN subframe other than those used for other purposes such as CoMP and positioning support.
- the mobile station 1 shown in FIG. 14 is a mobile station connected to the base station 10, and the mobile station 2 is a mobile station connected to the relay station 20.
- the relay station 20 sets subframe # 1 and subframe # 8 as MBSFN subframes and uses them for transmission from the base station 10 to the relay station 20.
- the mobile station 1 can receive signals from the base station 10 in all subframes. Also, the mobile station 2 has subframes # 0, subframe # 2, subframe # 3, subframe # 4, subframe # 5, subframes other than subframe # 1 and subframe # 8, which are MBSFN subframes. Data from relay station 20 is received in frame # 6, subframe # 7, and subframe # 9. Further, the relay station 20 receives data from the base station 10 in subframe # 1 and subframe # 8 set to MBSFN, and transmits data to the mobile station 2 in other subframes.
- the number of backhaul subframes (subframe # 1 and subframe # 8) and the number of subframes (subframes other than subframe # 1 and subframe # 8) of the access link of relay station 20 The ratio is 2: 8.
- the ratio between the number of subframes for the backhaul link and the number of subframes for the access link of the relay station 20 is determined by the number of subframes allocated to the backhaul among the number of MBSFN subframes to be set. Therefore, in order to change the number of MBSFN subframes allocated to the backhaul according to the traffic on the backhaul link and the access link, the base station 10 sends the position of the MBSFN subframe to the relay station 20 using a higher control signal. And the position of the backhaul subframe shall be notified. Therefore, there is a problem that the timing of changing the MBSFN subframe is limited. In particular, in 3GPP LTE, since the position of the MBSFN subframe is notified by SIB (System Information Block), the subframe ratio between the backhaul link and the access link can be changed only at the change timing of the SIB.
- SIB System Information Block
- An object of the present invention is to provide a wireless communication apparatus that flexibly changes a subframe of a backhaul link and an access link.
- the present invention is a wireless communication apparatus for relaying a signal between a base station and a mobile station, wherein a receiving unit that receives a signal from the base station or the mobile station, and a signal to the base station or the mobile station A transmission unit for transmitting, and a switching unit for switching to a reception mode for receiving the signal from the base station or the mobile station, or a transmission mode for transmitting the signal to the base station or the mobile station.
- a radio communication apparatus in which the own apparatus switches from the transmission mode to the reception mode in an MBSFN subframe among subframes subsequent to a subframe in which a NACK requesting retransmission is transmitted to the base station.
- the present invention is a wireless communication apparatus that communicates with a mobile station via a relay station, the receiver receiving a signal from the relay station or the mobile station, and a NACK requesting retransmission from the relay station And a allocating unit that allocates a signal for the relay station in a subframe that is subsequent to the subframe in which the relay station has set the MBSFN subframe. To do.
- the present invention is also a signal relay method for relaying a signal between a base station and a mobile station, and among the subframes after the subframe in which a NACK requesting retransmission is transmitted to the base station, the MBSFN subframe In the subframe set to 1, the transmission mode for transmitting the signal to the base station or the mobile station is switched to the reception mode for receiving the signal from the base station or the mobile station.
- the present invention is a signal allocation method for communicating with a mobile station via a relay station, the subframe after a subframe that has received a NACK requesting retransmission from the relay station, and In the subframe set by the relay station as the MBSFN subframe, a signal for the relay station is allocated.
- the subframes of the backhaul link and access link can be flexibly changed.
- FIG. 2 is a block diagram showing a configuration of relay station 100 according to the first embodiment.
- Diagram showing the link switching determination process flow The figure which shows the radio relay system concerning Embodiment 3
- FIG. Block diagram showing the configuration of relay station 100B Block diagram showing the configuration of the mobile station 330B
- a diagram showing a conventional wireless communication relay system The figure which shows the example of a setting of the conventional MBSFN sub-frame
- the number of MBSFN subframes is set to be larger than the number of subframes actually used for the backhaul. In this way, the number of subframes that can be selected for the backhaul can be increased.
- the relay station sets the MBSFN subframe, the subframe that is not used as the backhaul is allocated to the LTE-A mobile station. In this way, the subframe set as the MBSFN subframe can be used effectively.
- FIG. 1 is a diagram illustrating a wireless relay system according to the first embodiment.
- the relay station 100 is installed between the base station 200 and the mobile station, and communication between the base station 200 and the mobile stations 310 and 330 (in FIG. 1, arrows A, B, C) is performed via the relay station 100.
- the radio relay system shown in FIG. 1 assumes time division relay (TD Relay) that divides backhaul communication and relay access link communication on a time axis.
- TD Relay time division relay
- FDD time division multiplexing
- a two-hop relay in which data is transmitted from the base station 200 to the mobile stations 310 and 330 via the relay station 100 is assumed.
- the mobile station 320 is a mobile station connected to the base station 200, and the mobile station 310 and the mobile station 330 are mobile stations connected to the relay station 100.
- the mobile station 310 is an LTE mobile station, and the mobile station 330 is an LTE-A mobile station.
- FIG. 2 is a diagram illustrating a setting example of subframes in the wireless relay system illustrated in FIG.
- the frame in the wireless relay system is composed of subframes # 0 to # 9. 2 indicates a subframe of each station that is a transmission destination of a signal transmitted from each station. That is, the arrows in FIG. 2 indicate the downlink (DL) of the base station 200, the relay station 100 connected to the base station 200, the LTE mobile station 320 connected to the relay station 100, and the LTE-A mobile station 330.
- the transmission / reception operation is shown.
- the subframe set by the relay station 100 as the MBSFN subframe is shared by the base station 200 and the relay station 100, and the base station 200 sets the MBSFN subframe as the MBSFN subframe.
- the relay station 100 is notified of the subframe used for the backhaul from among the subframes.
- the relay station 100 receives a signal from the base station 200 in a subframe instructed to be used as a backhaul subframe from the base station 200, and transmits a signal to the mobile station 330 in an MBSFN subframe that is not used as a backhaul. Send.
- the relay station 100 sets subframe # 1, subframe # 2, subframe # 3, subframe # 6, subframe # 7, and subframe # 8 as MBSFN subframes. Yes. Among them, the base station 200 sets subframe # 1 and subframe # 8 as backhaul and notifies the relay station 100 of them. Therefore, the relay station 100 uses the subframe # 0, subframe # 4, subframe # 5, and subframe # 9, which are not set in the MBSFN subframe, of the mobile station 310 or LTE-A that is an LTE mobile station. A signal can be transmitted to the mobile station 330 which is a mobile station.
- the relay station 100 uses the subframe # 1, subframe # 2, subframe # 3, subframe # 6, subframe # 7, and subframe # 8 set to the MBSFN subframe as the backhaul.
- frame # 1 and subframe # 8 a signal from base station 200 is received.
- relay station 100 is set to the backhaul among subframe # 1, subframe # 2, subframe # 3, subframe # 6, subframe # 7, and subframe # 8 set to the MBSFN subframe.
- subframe # 2, subframe # 3, subframe # 6, and subframe # 7, a signal is transmitted to mobile station 330 that is an LTE-A mobile station.
- mobile station 330 connected to relay station 100 is an LTE-A mobile station
- mobile station 330 uses relay station 100 as a backhaul among the subframes set in the MBSFN subframe.
- a signal may be received from the relay station 100 even in subframe # 2, subframe # 3, subframe # 6, and subframe # 7.
- the mobile station 330 also uses the subframe # 2, subframe # 3, subframe # 6, and subframe # 7 that are not used as the backhaul among the subframes set in the MBSFN subframe.
- the control signal is received, whether or not there is an assignment addressed to the own station, and if there is an assignment, the signal is received.
- the relay station 100 when the base station 200 changes the subframe used for the backhaul and notifies the relay station 100 of information on the subframe used for the changed backhaul, the relay station 100 sets the MBSFN subframe. Subframe # 1, subframe # 2, subframe # 3, subframe # 6, subframe # 7, subframe # 8, and select the subframe to be changed. The relay station 100 is notified. When receiving the notification of the subframe to be changed from the base station 200, the relay station 100 stops assigning the mobile station 330, which is an LTE-A mobile station, to the corresponding subframe, and sets the corresponding subframe as a backhaul. The signal from the base station 200 is received.
- the mobile station 330 which is an LTE-A mobile station
- the relay station 100 transmits the control signal portion to the mobile station 310 or the mobile station 330 connected to the relay station 100 even if it is an MBSFN subframe used for backhaul.
- the relay station 100 transmits downlink (DL) assignment information for the LTE-A mobile station 330 in the control signal portion, so that the mobile station 330, which is the LTE-A mobile station, receives the MBSFN sub Even if it is a frame, it can be determined whether there is a signal addressed to the local station.
- DL downlink
- FIG. 3 is a block diagram showing a configuration of relay station 100 of the first embodiment.
- the relay station 100 shown in FIG. 3 includes a reception antenna 101, a radio reception unit 102, a demodulation unit 103, an error correction decoding unit 105, an error detection unit 107, a link switching processing unit 109, and an error correction coding unit. 111, a modulation unit 113, a wireless transmission unit 115, and a transmission antenna 117.
- the radio reception unit 102 receives a signal from the base station 200 via the reception antenna 101, performs radio processing such as down-conversion, and outputs the signal to the demodulation unit 103.
- the demodulation unit 103 demodulates the signal wirelessly processed by the wireless reception unit 102 and outputs the demodulated signal to the error correction decoding unit 105.
- the error correction decoding unit 105 decodes the signal demodulated by the demodulation unit 103 and outputs the decoded signal to the error detection unit 107.
- the error detection unit 107 detects whether there is an error in the signal decoded by the error correction decoding unit 105 using CRC or the like, and outputs the error detection result to the link switching processing unit 109. Error detection section 107 stops relaying the signal when an error is detected, and outputs the signal to error correction coding section 111 if no error is detected.
- the link switching processing unit 109 uses the subframe notified from the base station 200 among the MBSFN subframes as a backhaul. Perform link switching processing.
- a signal for notifying base station 200 of the MBSFN subframe used as the backhaul by the link switching process is generated and output to radio transmitting section 115.
- relay station 100 receives a signal from base station 200 in a subframe instructed to be used as a backhaul subframe from base station 200, and moves in an MBSFN subframe that is not used as a backhaul.
- a signal is transmitted to the station 330. Therefore, the relay station 100 can easily change the ratio between the backhaul and the access link.
- the error correction coding unit 111 performs error correction coding on the signal and outputs the signal to the modulation unit 113.
- Modulation section 113 modulates the signal and outputs it to radio transmission section 115.
- the radio transmission unit 115 performs radio processing such as up-conversion on the signal modulated by the modulation unit 113 based on the link switching signal, and transmits the signal from the transmission antenna 117 to the base station 200 or the mobile station 310.
- relay station 100 can easily change the ratio between the backhaul and the access link.
- the relay station 100 sets the MBSFN subframe, but assigns a subframe that is not used as a backhaul to the mobile station 330 of LTE-A. Therefore, subframes of the backhaul link and the access link can be flexibly changed, and the backhaul retransmission delay can be shortened without additional signaling.
- the subframe set by the relay station 100 as the MBSFN subframe has been described as being determined by the base station 200 and notified to the relay station 100, but is not limited thereto.
- the relay station 100 may determine and report to the base station 200.
- relay station 100 can easily change the ratio of the backhaul and the access link.
- the change in the ratio between the backhaul and the access link is notified from the base station 200 to the relay station 100, there is a problem that it is difficult to cope with an instantaneous traffic change caused by a signal reception error.
- the backhaul signal is a collection of signals addressed to a plurality of mobile stations or signals transmitted by the relay station 100 in a plurality of subframes, and the amount of information included in one signal may increase. high. Therefore, when the backhaul signal is retransmitted, the influence on the traffic fluctuation is great.
- the signal received by the relay station 100 in the backhaul is a signal to be transmitted later from the relay station 100 to the mobile station 310 via the access link, if a retransmission occurs in the backhaul, the delay affects the next access link. Therefore, the influence on the delay between the base station 200 and the mobile station 310 is large.
- FIG. 4 is a diagram illustrating a wireless relay system according to the second embodiment.
- the relay station 100A is installed between the base station 200A and the mobile stations 310 and 330, and communication between the base station 200A and the mobile stations 310 and 330 (in FIG. 4, arrow E , F, G) through the relay station 100A.
- the same mobile station is denoted by the same reference numeral, and detailed description thereof is omitted.
- the radio relay system shown in FIG. 4 assumes time division relay (TD Relay) in which backhaul communication and access link communication of relay station 100A are divided on a time axis. .
- TD Relay time division relay
- FDD time division multiplexing
- the radio relay system shown in FIG. 4 assumes a two-hop relay in which data is transmitted from the base station 200A to the mobile station via the relay station 100A.
- the mobile station 320 is a mobile station connected to the base station 200A, and the mobile stations 310 and 330 are mobile stations connected to the relay station 100A.
- the mobile station 310 is an LTE mobile station, and the mobile station 330 is an LTE-A mobile station.
- relay station 100A stops communication on the access link and receives a backhaul signal in order to receive a retransmission signal.
- base station 200A relays the retransmission signal to relay station 100A using the subframe of the access link that has not been set for the backhaul.
- the MBSFN subframe set in Embodiment 1 is used as a subframe used by base station 200A to relay a retransmission signal.
- FIG. 5 is a diagram showing an example of setting subframes in the downlink (DL) of the wireless relay system shown in FIG.
- frame 1 (Frame 1 in FIG. 5) and frame 2 (Frame 2 in FIG. 5) in the wireless relay system are composed of subframe # 0 to subframe # 9. 5 indicates a subframe of each station as a transmission destination of a signal transmitted from each station. That is, with the arrows shown in FIG. 5, the downlink (DL) of the base station 200A, the relay station 100A connected to the base station 200A, the LTE mobile station 320 connected to the relay station 100A, and the LTE-A mobile station 330 The operation of sending and receiving is shown.
- DL downlink
- relay station 100A In subframe # 8 of frame 1, relay station 100A has failed to receive a signal from base station 200A (indicated by x in FIG. 5). Therefore, relay station 100A transmits NACK to base station 200A at the timing of subframe # 2 of frame 2. However, NACK is transmitted in the uplink (UL) band. In FIG. 5, the NACK transmission timing is only indicated by an arrow, and in subframe # 2 of frame 2, relay station 100A transmits data to mobile station 320 in the downlink (DL) band. Can be sent.
- subframe # 6 of frame 2 is a subframe that is originally not set as a backhaul, but is a subframe that is set as an MBSFN subframe.
- relay station 100A When relay station 100A transmits a NACK to base station 200A in subframe # 2 of frame 2, it connects to its own station in order to receive a retransmission signal from base station 200A in subframe # 6 after that four subframes. The allocation of the signal to the LTE-A mobile station 330 is stopped (broken arrow in FIG. 5). Then, in subframe # 6 of frame 2, relay station 100A switches from the access link transmission mode to the backhaul reception mode.
- relay station 100A switches from the access link transmission mode to the backhaul reception mode using NACK requesting retransmission from base station 200A as a trigger, so that retransmission is possible.
- the backhaul and access link resources can be allocated according to the instantaneous traffic fluctuations.
- the relay station 100A first sets the MBSFN subframe among the subsequent subframes. The configured subframe is changed from the access link to the backhaul.
- the subframe set in the MBSFN subframe has been described as an example of the subframe to be changed from the access link to the backhaul link.
- the present invention is not limited to this.
- the subframe (1) a subframe in which the relay station 100A transmits a CSI-RS (Channel State Information Signal), and (2) a subframe in which the relay station 100A transmits a signal for Positioning support.
- relay station 100A may transmit the access link without changing the subframe to the backhaul. Therefore, the mobile station 320 or the mobile station 330 that receives the signal from the relay station 100A can receive the signal for CSI-RS or Positioning support.
- the subframe set in the MBSFN subframe has been described as an example of the subframe to be changed from the access link to the backhaul, the present invention is not limited to this.
- the subframe is a subframe originally set to the backhaul, a subframe that can be changed to the backhaul among the rear subframes may be changed to the backhaul.
- frame 1 (Frame 1 in FIG. 6) and frame 2 (Frame 2 in FIG. 6) in the wireless relay system of the present embodiment are composed of subframe # 0 to subframe # 9.
- Has been. 6 indicates a subframe of each station that is a transmission destination of a signal transmitted from each station. That is, the arrows shown in FIG. 6 indicate that the base station 200A, the relay station 100A connected to the base station 200A, the LTE mobile station 310 connected to the relay station 100A, and the LTE-A mobile station 330 on the downlink (DL). The transmission / reception operation is shown.
- relay station 100A has failed to receive a signal (marked with x in FIG. 6). Therefore, relay station 100A transmits NACK to base station 200A at the timing of subframe # 7 of frame 1. However, NACK is transmitted in the uplink (UL) band. In FIG. 6, the NACK transmission timing is only illustrated by arrows, and even in subframe # 7 of frame 1, relay station 100A transmits data to mobile station 320 in the downlink (DL) band. Can be sent.
- base station 200A when receiving a NACK from relay station 100A in subframe # 7 of frame 1, base station 200A switches subframe # 1 of frame 2 four frames after receiving NACK to the backhaul.
- subframe # 1 of frame 2 is a subframe originally set as a backhaul. Therefore, base station 200A transmits a signal to relay station 100A in subframe # 2 of frame 2 which is the next candidate.
- the relay station 100A also performs the same calculation, and switches subframe # 2 of frame 2 to the backhaul (denoted as retransmission backhaul in FIG. 6).
- FIG. 7 is a block diagram showing a configuration of relay station 100A.
- a relay station 100A illustrated in FIG. 7 includes a reception antenna 101, a radio reception unit 102, a demodulation unit 103, an error correction decoding unit 105, an error detection unit 107, a link switching unit 109A, and an error correction coding unit 111.
- a modulation unit 113, a wireless transmission unit 115, and a transmission antenna 117. 7 is different from the relay station 100 shown in FIG. 3 in the link switching unit 109A.
- the radio reception unit 102 receives a signal from the base station 200A via the reception antenna 101, performs radio processing such as down-conversion, and outputs the signal to the demodulation unit 103.
- the demodulation unit 103 demodulates the signal wirelessly processed by the wireless reception unit 102 and outputs the demodulated signal to the error correction decoding unit 105.
- the error correction decoding unit 105 decodes the signal demodulated by the demodulation unit 103 and outputs the decoded signal to the error detection unit 107.
- the error detection unit 107 detects whether there is an error in the signal decoded by the error correction decoding unit 105 by CRC or the like, and outputs the error detection result to the link switching unit 109A. Error detection section 107 stops relaying the signal when an error is detected, and outputs the signal to error correction coding section 111 if no error is detected.
- the link switching unit 109A performs link switching determination according to a link switching determination processing flow described later, and outputs a link switching signal for switching between an access link and a backhaul to the wireless transmission unit 115.
- FIG. 8 is a diagram illustrating a link switching determination processing flow of the link switching unit 109A.
- Step 1 if retransmission occurs in the backhaul, the process proceeds to Step 2, or if not, the process proceeds to Step 3.
- Step 2 relay station 100A transmits NACK to base station 200A in subframe #N.
- M is the subframe number of retransmission candidate subframe #M
- N is the subframe number of subframe #N.
- Step 3 relay station 100A transmits NACK to base station 200A in subframe #N, and the link switching determination processing flow ends.
- Step 4 it is determined whether or not the subframe number M of the subframe #M that is a retransmission candidate subframe is larger than N + Th.
- M is larger than N + Th (in the case of Yes)
- retransmission candidate subframe #M is a subframe that is more than Th behind N
- the link switching determination processing flow ends.
- the processing transits to Step5.
- Step 5 it is determined whether subframe #M, which is a retransmission candidate subframe, is set as an MBSFN subframe.
- retransmission candidate subframe #M is set as an MBSFN subframe
- the process proceeds to step 6. If retransmission candidate subframe #M is not set as an MBSFN subframe, subframe number M of subframe #M, which is a retransmission candidate subframe, is incremented by 1, and the process proceeds to Step 4.
- retransmission candidate subframe #M is set to (1) subframe set for backhaul, (2) subframe set for CSI-RS transmission, and (3) Positioning support. If it is any of the subframes, the subframe number M of the subframe #M that is a retransmission candidate subframe is incremented by 1, and the process proceeds to Step 4. If retransmission candidate subframe #M does not correspond to any of the subframes (1) to (3), the process transits to Step 7.
- Step 7 the relay station 100A changes the access link to the backhaul.
- the error correction coding unit 111 performs error correction coding on the signal and outputs the signal to the modulation unit 113.
- Modulation section 113 modulates the signal and outputs it to radio transmission section 115.
- the radio transmission unit 115 performs radio processing such as up-conversion on the signal modulated by the modulation unit 113 based on the link switching signal, and transmits the signal from the transmission antenna 117 to the base station 200A or the mobile station 310.
- relay station 100A can easily change the ratio between the backhaul and the access link. Also, the relay station 100A sets the MBSFN subframe, but the subframe that is not used as a backhaul is allocated to the LTE-A mobile station 330. Therefore, subframes of the backhaul link and the access link can be flexibly changed, and the backhaul retransmission delay can be shortened without additional signaling.
- relay station 100A switches from the access link transmission mode to the backhaul reception mode using NACK requesting retransmission from base station 200A as a trigger.
- the resources of backhaul and access link can be allocated according to the instantaneous traffic fluctuation due to retransmission.
- base station 200A transmits a retransmission signal four subframes after relay station 100A transmits NACK, but the present invention is not limited to this. For example, it may be specified that the base station 200A transmits a retransmission signal after 5 subframes, 3 subframes, or 2 subframes after the relay station 100A transmits NACK. However, information regarding the number of subframes to be retransmitted as a reference is shared between the base station 200A and the relay station 100A in advance.
- base station 200A may transmit a retransmission signal 4 subframes after relay station 100A transmits NACK from the second or more retransmissions.
- relay station 100A does not necessarily need to transmit a retransmission signal in subframe in which the access link is changed to the backhaul. That is, relay station 100A receives if there is an assignment addressed to itself in a subframe to be changed from an access link to a backhaul, and does not receive if there is no assignment addressed to itself.
- the base station 200A changes the retransmission signal from the access link to the backhaul based on the priority to the signal transmitted to the mobile station 310 connected to the own station or a relay station other than the relay station 100A. Decide whether to transmit in frames.
- retransmission is performed in that subframe.
- a signal may be transmitted and a new signal may be transmitted in the switched subframe.
- FIG. 9 is a diagram illustrating a wireless relay system according to the third embodiment.
- the relay station 100B is installed between the base station 200B and the mobile station, and communication between the base station 200B and the mobile stations 310B, 330B (in FIG. 9, arrows H, I, J) is performed via the relay station 100B.
- the radio relay system shown in FIG. 9 assumes time division relay (TD Relay) that divides backhaul communication and access link communication of relay station 100B on a time axis. .
- TD Relay time division relay
- FDD time division multiplexing
- the radio relay system shown in FIG. 9 assumes a 2-hop relay in which data is transmitted from the base station 200B to the mobile station via the relay station 100B.
- the mobile station 320B is a mobile station connected to the base station 200B, and the mobile stations 310B and 330B are mobile stations connected to the relay station 100B.
- the mobile station 310B is an LTE mobile station, and the mobile station 330B is an LTE-A mobile station.
- relay station 100B when relay station 100B switches from an access link to a backhaul, it notifies link switching to mobile station 310B or mobile station 330B. Therefore, the mobile station 310B or the mobile station 330B can recognize that the backhaul is not allocated by receiving the notification of switching.
- relay station 100B notifies link switching to mobile station 310B or mobile station 330B when switching from an access link to a backhaul occurs.
- the mobile station 310B or the mobile station 330B When receiving the link switching notification, the mobile station 310B or the mobile station 330B performs any of the following operations (1) to (5) in a subframe in which the link is changed.
- operation (1) the mobile station 310B or the mobile station 330B stops measuring the channel quality of the cell of the relay station 100B.
- operation (2) the mobile station 310B or the mobile station 330B stops the operation of receiving the DL signal allocation information (stops the blind determination).
- the mobile station 310B or the mobile station 330B measures the line of a cell other than the connected relay station 100B.
- the mobile station 310B or the mobile station 330B measures the reception timing of cells other than the connected relay station 100B, and generates a position measurement signal.
- operation (5) the mobile station 310B or the mobile station 330B stops receiving and enters a sleep state.
- the link switching signal transmitted from the relay station 100B to the mobile station 310B or the mobile station 330B is allocated and transmitted to the control signal area transmitted from the relay station 100B to the mobile station 310B or the mobile station 330B.
- the control signal area may be OFDM symbols # 0 to # 2 in a subframe, or OFDM symbols # 0 to # 3 depending on the bandwidth.
- the relay station 100B may transmit a link switching signal using an area for transmitting PHICH (usually, an area for transmitting UL ACK / NACK). Further, a link switching signal may be transmitted to the common control signal area. In any case, a region where the link switching signal is transmitted is determined in advance by the relay station 100B and the mobile station 310B or the mobile station 330B.
- FIG. 10 shows an example of setting subframes in the downlink (DL) of the wireless relay system shown in FIG.
- frame 1 (Frame 1 in FIG. 10) and frame 2 (Frame 2 in FIG. 10) in the wireless relay system are composed of subframes # 0 to # 9.
- the tip of the arrow shown in FIG. 10 indicates a subframe of each station that is a transmission destination of a signal transmitted from each station. That is, with the arrows shown in FIG. 10, the downlink (DL) of the base station 200B and the relay station 100B connected to the base station 200B, the LTE mobile station 310B connected to the relay station 100B, and the LTE-A mobile station 330B.
- the transmission / reception operation is shown.
- relay station 100B In subframe # 8 of frame 1, relay station 100B has failed to receive a signal from base station 200B (indicated by a cross in FIG. 10). Therefore, relay station 100B transmits NACK to base station 200B at the timing of subframe # 2 of frame 2. However, NACK is transmitted in the uplink (UL) band. In FIG. 10, only the transmission timing of NACK is shown by an arrow. Even in subframe # 2 of frame 2, relay station 100B transmits data to mobile station 330B in the downlink (DL) band. Can be sent.
- DL downlink
- subframe # 6 of frame 2 is a subframe that is originally not set as a backhaul, but is a subframe that is set as an MBSFN subframe.
- relay station 100B When relay station 100B transmits a NACK to base station 200B in subframe # 2 of frame 2, relay station 100B receives a retransmission signal from base station 200B in subframe # 6 after four subframes. The allocation of the signal to the connected LTE-A mobile station 330B is stopped (broken arrow in FIG. 10). Then, in subframe # 6 of frame 2, relay station 100A switches from the access link transmission mode to the backhaul reception mode.
- Relay station 100B notifies link switching to mobile station 330B in the same subframe in which a retransmission request is transmitted to relay station 100B in subframe # 2 of frame 2.
- the mobile station 330B that has received the notification of link switching recognizes that subframe # 6 of frame 2 has been changed to a backhaul.
- relay station 100B transmits a notification of link switching to mobile station 330B in the same subframe as the subframe in which a retransmission request is transmitted to base station 200B.
- the present invention is not limited to this.
- the switching signal notifies the subframe number M to be switched.
- the subframe number for transmitting the switching signal is not particularly limited.
- the mobile station 330B knows the subframe to be switched without considering the subframe to be switched in consideration of exception processing and the like.
- a method (the former) that specifies that the switching signal is transmitted before how many subframes to switch, and the timing of transmitting the retransmission signal to the base station 200B as shown in the example
- the mobile station 330B that has received the switching signal recognizes that there is no signal from the relay station 100B after a predetermined subframe.
- the mobile station 330B performs the same calculation as that of the relay station 100B and the base station 200B, and grasps in what number of subframes there is no signal from the relay station 100B.
- FIG. 11 is a block diagram showing a configuration of relay station 100B.
- a relay station 100B illustrated in FIG. 11 includes a reception antenna 101, a radio reception unit 102, a demodulation unit 103, an error correction decoding unit 105, an error detection unit 107, a link switching unit 109A, and an error correction coding unit 111.
- the relay station 100B shown in FIG. 11 is different from the relay station 100A shown in FIG. 7 in that a switching signal generation unit 219 is newly provided. The detailed explanation is omitted.
- the switching signal generation unit 219 receives the result determined by the link switching unit 109A, and when it is determined to switch from the access link to the backhaul according to the determination result, in which subframe the link is switched to the mobile station 330B. Is generated and is output to the wireless transmission unit 115. Then, the wireless transmission unit 115 transmits the link switching signal to the mobile station 330B via the transmission antenna 117.
- FIG. 12 is a block diagram showing the configuration of the mobile station 330B.
- the mobile station 330B shown in FIG. 12 includes a reception antenna 301, a radio reception unit 302, a signal separation unit 303, a demodulation unit 305, an error correction decoding unit 307, a switching signal reception unit 309, and an error detection unit 311. , An error correction encoding unit 313, a modulation unit 315, a wireless transmission unit 317, and a transmission antenna 319.
- the radio reception unit 302 receives a signal from the base station 200B or the relay station 100B via the reception antenna 101, performs radio processing such as down-conversion, and outputs the signal to the signal separation unit 303.
- the signal separation unit 303 separates the data received from the relay station 100B and the link switching signal, outputs the received data to the demodulation unit 305, and outputs the link switching signal to the switching signal reception unit 309.
- the switching signal receiving unit 309 When the switching signal receiving unit 309 receives an instruction to switch the subframe based on the link switching signal, the switching signal receiving unit 309 notifies the radio receiving unit 302 that the subframe is changed from the access link subframe to the backhaul subframe. To do.
- the demodulator 305 demodulates the data from the relay station 100B subjected to the separation processing by the signal separation unit 303 and outputs the demodulated data to the error correction decoding unit 307.
- the error correction decoding unit 307 decodes the data demodulated by the demodulation unit 305 and outputs the decoded data to the error detection unit 311.
- the error detection unit 311 detects whether there is an error in the signal decoded by the error correction decoding unit 307 by CRC or the like.
- the error correction coding unit 313 performs error correction coding on the signal and outputs the signal to the modulation unit 315.
- Modulation section 315 modulates the signal and outputs it to radio transmission section 317.
- the radio transmission unit 317 performs radio processing such as up-conversion on the signal modulated by the modulation unit 113 and transmits the signal from the transmission antenna 117 to the base station 200B or the relay station 100B.
- relay station 100B can easily change the ratio between the backhaul and the access link.
- the relay station 100B sets the MBSFN subframe, but the subframe not used as the backhaul is allocated to the LTE-A mobile station 330B. Therefore, subframes of the backhaul link and the access link can be flexibly changed, and the backhaul retransmission delay can be shortened without additional signaling.
- relay station 100B switches from the access link transmission mode to the backhaul reception mode using NACK requesting retransmission from base station 200B as a trigger.
- the resources of backhaul and access link can be allocated according to the instantaneous traffic fluctuation due to retransmission.
- base station 200B transmits a retransmission signal 4 subframes after relay station 100B transmits NACK, but this is not a limitation. For example, it may be specified that the base station 200B transmits a retransmission signal after 5 subframes, 3 subframes, or 2 subframes after the relay station 100B transmits NACK. However, information regarding the number of subframes to be retransmitted as a reference is previously shared between the base station 200B and the relay station 100B.
- base station 200B may transmit a retransmission signal four subframes after relay station 100A transmits a NACK from the second or more retransmissions.
- relay station 100B does not necessarily have to transmit a retransmission signal in a subframe in which the access link is changed to the backhaul. That is, relay station 100B receives if there is an assignment addressed to itself in a subframe to be changed from an access link to a backhaul, and does not receive it if there is an assignment to that station.
- the base station 200B changes the retransmission signal from the access link to the backhaul based on the priority to the signal transmitted to the mobile station 320 connected to the own station and the relay station other than the relay station 100B. Decide whether to transmit in frames.
- retransmission is performed in that subframe.
- a signal may be transmitted and a new signal may be transmitted in the switched subframe.
- link switching method of the second embodiment and the link switching method described in the third embodiment may be determined by data characteristics.
- Data characteristics include data volume and delay tolerance.
- the data amount as the data characteristic may be based on TBS (Trans block size) and the number of assigned RBs. It is possible to operate by setting a threshold value and applying it if the number of TBSs or RBs is equal to or greater than the threshold value, and not applying it if it is less than the threshold value. In this way, unnecessary switching can be limited, so that the number of switching can be reduced. In addition, when the number of TBS and RB is small, there is no need to switch to reception because there is a high probability that retransmission can be performed in the next subframe assigned to the backhaul.
- TBS Trans block size
- the delay tolerance as the data characteristic may be based on QoS.
- the embodiment 2 or 3 can be applied, and in the case of large data, it can be operated as not applied.
- switching can be performed according to nine types of QCI (QoS Class Identifier) which is a signal indicating QoS (3GPP TS23.203 Table 6.1.7).
- QCI QoS Class Identifier
- the threshold value is set in the same manner as the data amount, and it is applied if QoS exceeding the threshold value is obtained, and not applied if QoS is less than the threshold value. It is also possible to switch by a Bearer ID that indicates the type of data. In this way, unnecessary switching can be restricted, so that control can be performed according to priority.
- the threshold value used in the data characteristics can be controlled so that a default value is set in advance and the base station notifies the relay station only when the threshold value is changed.
- An antenna port refers to a logical antenna composed of one or a plurality of physical antennas. That is, the antenna port does not necessarily indicate one physical antenna, but may indicate an array antenna composed of a plurality of antennas. For example, in LTE, it is not defined how many physical antennas an antenna port is composed of, but is defined as a minimum unit in which a base station can transmit different reference signals. The antenna port may be defined as a minimum unit for multiplying the weight of the precoding vector.
- each functional block used in the description of each of the above embodiments is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them. Although referred to as LSI here, it may be referred to as IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI, and implementation with a dedicated circuit or a general-purpose processor is also possible.
- An FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- the radio communication apparatus, signal relay method, and signal allocation method according to the present invention can flexibly change the subframes of the backhaul link and the access link, and are useful as a radio communication apparatus, a radio communication method, and the like.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
TD relayでは、下り回線(Down Link:DL)において、基地局10から中継局20の送信と、中継局20から移動局2の送信とを時間で分割する。また、上り回線(Up Link:UL)においても、移動局2から中継局20の送信と、中継局20から基地局10の送信とを時間で分割する。このように基地局と中継局間のバックホール(backhaul)の通信と、中継局20と移動局2間のアクセスリンク(access link)の通信とを時間軸で分割することで、中継局20が送信する時間と受信する時間とを分割することができる。したがって、中継局20は、送信アンテナと受信アンテナ間の回りこみの影響を受けずに、中継することができる。
LTE-Aでは、LTEとの相互互換性を保つために、DLにおいて、基地局から中継局への送信時にMBSFNサブフレームを設定することが検討されている。しかしながら、LTEの移動局は、MBMSデータを受信する機能がないので、MBSFNサブフレームでは、制御信号部分のみを受信し、それ以外のデータ部分は無視する。MBMSデータは、複数の基地局から送信される可能性がある。そのため、LTEの移動局は、自局が接続する基地局の受信品質を正しく測定することができない可能性がある。したがって、LTEの移動局は、MBSFNサブフレームでは受信品質の測定をしない。
ここで、本実施の形態では、中継局の生成するセルでは、実際にバックホールに使われるサブフレーム数よりも、MBSFNサブフレーム数を多く設定する。このようにすることで、バックホールに選択できるサブフレーム数を増加できる。また、中継局がMBSFNサブフレームに設定したが、バックホールとして使用されないサブフレームは、LTE-Aの移動局に割当てる。このようにすることで、MBSFNサブフレームに設定したサブフレームを有効に利用することができる。
なお、図1に示す無線中継システムでは、時間分割多重(FDD)により通信を行う。
なお、図1に示す無線中継システムでは、基地局200から中継局100を介して移動局310、330へデータを送信する、2ホップの中継を想定する。
そこで、実施の形態2として、再送によって瞬時に変わるトラフィックに対応できる無線中継システムについて、図4~図8を参照して説明する。図4は、実施の形態2に係る無線中継システムを示す図である。図4に示す無線中継システムでは、基地局200Aと移動局310、330との間に中継局100Aを設置し、基地局200Aと移動局310、330との間の通信(図4中、矢印E、F、G)を、中継局100Aを介して行う。ここで、各移動局は実施の形態1と同じであるため、同じ移動局には同一符号を付し、その詳細な説明を省略する。
なお、図4に示す無線中継システムでは、時間分割多重(FDD)により通信を行う。
なお、図4に示す無線中継システムでは、基地局200Aから中継局100Aを介して移動局へデータを送信する、2ホップの中継を想定する。
なお、本実施の形態では、アクセスリンクからバックホールリンクに変更するサブフレームとして、MBSFNサブフレームに設定されているサブフレームを例として説明したが、これに限らない。例えば、サブフレームの他の目的として、(1)中継局100AがCSI-RS(Channel State Information Reference Signal)を送信するサブフレーム、(2)中継局100AがPositioning support用の信号を送信するサブフレーム、として使用されている場合、中継局100Aは、例外的に、サブフレームをバックホールに変更せずにアクセスリンクを送信しても良い。そのため、中継局100Aの信号を受信する移動局320又は移動局330が、CSI-RSや、Positioning support用の信号を受信することができる。
図8を参照して、リンク切替部109Aのリンク切り替え判定処理フローについて説明する。図8は、リンク切替部109Aのリンク切り替え判定処理フローを示す図である。
Step2では、中継局100Aが、サブフレーム#NでNACKを基地局200Aへ送信する。再送候補サブフレーム#MをM=N+4とし、Step4へ遷移する。なお、Mとは、再送候補サブフレーム#Mのサブフレーム番号であり、Nとはサブフレーム#Nのサブフレーム番号である。
Step4では、再送候補サブフレームであるサブフレーム#Mのサブフレーム番号Mが、N+Thよりも大きいか否かを判定する。そして、MがN+Thよりも大きい場合(Yesの場合)、言い換えると、再送候補サブフレーム#Mが、NよりもTh以上後方のサブフレームの場合、アクセスリンクとバックホールの変更を中止する。そして、リンク切り替え判定処理フローを終了する。
また、再送候補サブフレームであるサブフレーム#Mのサブフレーム番号Mが、N+Thよりも小さい場合(Noの場合)、Step5へ遷移する。
次に、図9~図12を参照し、本発明の実施の形態3に係る無線中継システムについて説明する。図9は、実施の形態3に係る無線中継システムを示す図である。図9に示す無線中継システムでは、基地局200Bと移動局との間に中継局100Bを設置し、基地局200Bと移動局310B、330Bとの間の通信(図9中、矢印H、I、J)を、中継局100Bを介して行う。
なお、図9に示す無線中継システムでは、時間分割多重(FDD)により通信を行う。
なお、図9に示す無線中継システムでは、基地局200Bから中継局100Bを介して移動局へデータを送信する、2ホップの中継を想定する。
とする。
101 受信アンテナ
103 復調部
105 誤り訂正復号部
107 誤り検出部
109 リンク切替処理部
109A リンク切替部
111 誤り訂正符号化部
113 変調部
115 無線送信部
117 送信アンテナ
200、200A、200B 基地局
219 切替信号生成部
301 受信アンテナ
303 信号分離部
305 復調部
307 誤り訂正復号部
309 切替信号受信部
310、310B 移動局(LTE)
311 誤り検出部
313 誤り訂正符号化部
315 変調部
317 無線送信部
319 送信アンテナ
320、320B 移動局
330、330B 移動局(LTE-A)
Claims (7)
- 基地局と移動局間の信号を中継するための無線通信装置であって、
前記基地局又は前記移動局から信号を受信する受信部と、
前記基地局又は前記移動局へ信号を送信する送信部と、
前記基地局又は前記移動局から前記信号を受信する受信モード、或いは前記基地局又は前記移動局へ前記信号を送信する送信モードに切り替える切り替え部とを備え、
前記切り替え部は、
前記基地局へ再送を要求するNACKを送信したサブフレーム以降のサブフレームのうち、自装置がMBSFNサブフレームに設定しているサブフレームにおいて、前記送信モードから前記受信モードへ切り換える、
無線通信装置。 - 請求項1に記載の無線通信装置は、
前記基地局に再送を要求するNACKを送信した前記サブフレームで、前記移動局に対してデータ 割り当てがないサブフレームを、前記基地局に通知する、
無線通信装置。 - 請求項1に記載の無線通信装置であって、
前記切り替え部は、
前記基地局へ再送を要求するNACKを送信した前記サブフレーム以降のサブフレームのうち、自装置がMBSFNサブフレームに設定しているサブフレームにおいて、前記基地局から送信されるデータ量が所定の閾値よりも大きい場合に、前記送信モードから前記受信モードへ切り換える、
無線通信装置。 - 請求項1に記載の無線通信装置であって、
前記切り替え部は、
前記基地局へ再送を要求するNACKを送信した前記サブフレーム以降のサブフレームのうち、自装置がMBSFNサブフレームに設定しているサブフレームにおいて、前記基地局から送信されるデータの許容遅延量が所定の閾値よりも小さい場合に、前記送信モードから前記受信モードへ切り換える、
無線通信装置。 - 中継局を介して、移動局と通信を行う無線通信装置であって、
前記中継局又は前記移動局から信号を受信する受信部と、
前記中継局から再送を要求するNACKを受信したサブフレーム以降のサブフレームであって、かつ、前記中継局がMBSFNサブフレームに設定しているサブフレームにおいて、前記中継局向けの信号を割り当てる割当部と、を具備する、
無線通信装置。 - 基地局と移動局間の信号を中継するための信号中継方法であって、
前記基地局へ再送を要求するNACKを送信したサブフレーム以降のサブフレームのうち、MBSFNサブフレームに設定しているサブフレームにおいて、前記基地局又は前記移動局へ前記信号を送信する送信モードから前記基地局又は前記移動局から前記信号を受信する受信モードへ切り換える、
信号中継方法。 - 中継局を介して、移動局と通信を行うための信号割当方法であって、
前記中継局から再送を要求するNACKを受信したサブフレーム以降のサブフレームであって、かつ、前記中継局がMBSFNサブフレームに設定しているサブフレームにおいて、前記中継局向けの信号を割り当てる、
信号割当方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011525792A JP5537550B2 (ja) | 2009-08-05 | 2010-08-04 | 無線通信装置、信号中継方法、および信号割当方法 |
CN201080032624.1A CN102474751B (zh) | 2009-08-05 | 2010-08-04 | 无线通信装置、信号中继方法和信号分配方法 |
US13/384,846 US8804601B2 (en) | 2009-08-05 | 2010-08-04 | Wireless communication device, signal relay method, and signal allocation method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-182527 | 2009-08-05 | ||
JP2009182527 | 2009-08-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011016232A1 true WO2011016232A1 (ja) | 2011-02-10 |
Family
ID=43544141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/004912 WO2011016232A1 (ja) | 2009-08-05 | 2010-08-04 | 無線通信装置、信号中継方法、および信号割当方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8804601B2 (ja) |
JP (1) | JP5537550B2 (ja) |
CN (1) | CN102474751B (ja) |
WO (1) | WO2011016232A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103563267A (zh) * | 2011-02-22 | 2014-02-05 | 高通股份有限公司 | 用于远程无线电头端(rrh)部署的无线电资源监视(rrm)和无线电链路监视(rlm)规程 |
US20230057052A1 (en) * | 2021-08-18 | 2023-02-23 | Qualcomm Incorporated | Techniques for reference signal bundling in sidelink channels |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8605643B2 (en) * | 2008-03-14 | 2013-12-10 | Samsung Electronics Co., Ltd. | Apparatus and method for retransmitting of data in a wireless communication system using relay |
US9635571B2 (en) * | 2010-09-13 | 2017-04-25 | Blinq Wireless Inc. | System and method for reception mode switching in dual-carrier wireless backhaul networks |
CN102480347B (zh) * | 2010-11-23 | 2015-06-03 | 中兴通讯股份有限公司 | 中继链路子帧配置切换时确认信息的反馈方法及装置 |
US20140204780A1 (en) * | 2011-05-13 | 2014-07-24 | Kenji Yamada | Wireless device, router, wireless system, and method for high-speed optimization of wireless transmission |
WO2012173530A1 (en) * | 2011-06-13 | 2012-12-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Sub-carrier allocation in a wireless communication system using relays |
CN102307060B (zh) * | 2011-08-31 | 2015-08-19 | 电信科学技术研究院 | 一种传输数据的方法和设备 |
US20140185496A1 (en) * | 2013-01-02 | 2014-07-03 | Qualcomm Incorported | Low latency arq/harq operating in carrier aggregation for backhaul link |
CN104053243B (zh) * | 2013-03-11 | 2019-03-12 | 中兴通讯股份有限公司 | 无线局域网中的数据传输方法和系统 |
AU2014400692B2 (en) * | 2014-07-09 | 2018-09-06 | Telefonaktiebolaget Lm Ericsson (Publ) | A network node and a method therein for performing comp reception of a transmission from a wireless device |
CN104615573B (zh) * | 2015-01-13 | 2018-01-26 | 大唐移动通信设备有限公司 | 一种通信方法及装置 |
CN106254041A (zh) * | 2015-08-20 | 2016-12-21 | 北京智谷技术服务有限公司 | 数据传输方法、数据接收方法、及其装置 |
JP6763242B2 (ja) * | 2016-09-05 | 2020-09-30 | ソニー株式会社 | 通信装置及び通信方法 |
CN116981067A (zh) * | 2022-04-19 | 2023-10-31 | 华为技术有限公司 | 数据传输的方法和装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007143753A2 (en) * | 2006-06-09 | 2007-12-13 | Qualcomm Incorporated | Cell specific retransmission of single frequency network mbms data |
JP2009182527A (ja) | 2008-01-29 | 2009-08-13 | Morpho Inc | 撮像方法および撮像装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9265028B2 (en) | 2006-06-09 | 2016-02-16 | Qualcomm Incorporated | Multicast/broadcast reporting for wireless networks |
JP4860381B2 (ja) * | 2006-07-10 | 2012-01-25 | 日本電気通信システム株式会社 | 無線通信システム、システム制御装置、無線基地局、無線通信端末、通信制御方法、および通信制御プログラム |
CN102318227B (zh) * | 2009-02-17 | 2015-11-25 | Lg电子株式会社 | 在中继站与基站之间发送/接收数据的方法 |
US8289895B2 (en) * | 2009-04-24 | 2012-10-16 | Research In Motion Limited | Relay link HARQ operation |
WO2010143867A2 (ko) * | 2009-06-08 | 2010-12-16 | 엘지전자 주식회사 | 다중 반송파 지원 무선 통신 시스템에서 중계기 백홀 링크 및 액세스 링크 상의 반송파 할당 방법 |
AR077108A1 (es) * | 2009-06-16 | 2011-08-03 | Interdigital Patent Holdings | Metodo y aparato para una operacion harq sincronizada y evitar interferencia |
US8848742B2 (en) * | 2009-10-15 | 2014-09-30 | Qualcomm Incorporated | Transmission strategy in MBSFN subframes |
US9014079B2 (en) * | 2009-10-29 | 2015-04-21 | Telefonaktiebolaget L M Ericsson (Publ) | Intra-subframe time multiplexing |
US8274924B2 (en) * | 2010-01-06 | 2012-09-25 | Research In Motion Limited | Intra-donor cell coordinated multi-point transmission with type 1 relay |
CN103039107B (zh) * | 2010-03-29 | 2016-01-27 | Lg电子株式会社 | 用于对无线电通信系统中的小区间干扰协调的测量的方法和装置 |
-
2010
- 2010-08-04 JP JP2011525792A patent/JP5537550B2/ja not_active Expired - Fee Related
- 2010-08-04 CN CN201080032624.1A patent/CN102474751B/zh not_active Expired - Fee Related
- 2010-08-04 US US13/384,846 patent/US8804601B2/en not_active Expired - Fee Related
- 2010-08-04 WO PCT/JP2010/004912 patent/WO2011016232A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007143753A2 (en) * | 2006-06-09 | 2007-12-13 | Qualcomm Incorporated | Cell specific retransmission of single frequency network mbms data |
JP2009182527A (ja) | 2008-01-29 | 2009-08-13 | Morpho Inc | 撮像方法および撮像装置 |
Non-Patent Citations (2)
Title |
---|
"Further Advancements for E-UTRA Physical Layer Aspects", 3GPP TR36.814 V0.4.1, February 2009 (2009-02-01), pages 9 - 10, XP050380817 * |
FUJITSU: "Discussion on Backhaul link of Type-1 Relay for LTE-A TDD", 3GPP R1-091506, 23 March 2009 (2009-03-23), XP050339065 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103563267A (zh) * | 2011-02-22 | 2014-02-05 | 高通股份有限公司 | 用于远程无线电头端(rrh)部署的无线电资源监视(rrm)和无线电链路监视(rlm)规程 |
CN103563267B (zh) * | 2011-02-22 | 2016-11-09 | 高通股份有限公司 | 用于无线通信的方法和设备 |
US20230057052A1 (en) * | 2021-08-18 | 2023-02-23 | Qualcomm Incorporated | Techniques for reference signal bundling in sidelink channels |
US11968142B2 (en) * | 2021-08-18 | 2024-04-23 | Qualcomm Incorporated | Techniques for reference signal bundling in sidelink channels |
Also Published As
Publication number | Publication date |
---|---|
JPWO2011016232A1 (ja) | 2013-01-10 |
CN102474751A (zh) | 2012-05-23 |
US20120120867A1 (en) | 2012-05-17 |
CN102474751B (zh) | 2014-11-12 |
JP5537550B2 (ja) | 2014-07-02 |
US8804601B2 (en) | 2014-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5537550B2 (ja) | 無線通信装置、信号中継方法、および信号割当方法 | |
JP6967753B2 (ja) | 256qamに対するmcsテーブルの適応 | |
CN107925524B (zh) | 确定用于无线终端的操作的模式的方法 | |
JP4413900B2 (ja) | システム情報媒体アクセス制御プロトコルメッセージの伝送方法、媒体アクセス制御ユニットおよびコンピュータプログラムの要素 | |
US11576015B2 (en) | Method for transmitting signal by terminal for V2X communication in wireless communication system, and device using same method | |
JP5934700B2 (ja) | 中継局、基地局、送信方法、及び受信方法 | |
US20130203416A1 (en) | Handover Preparations | |
JP5776551B2 (ja) | 中継局、中継方法、及び無線通信装置 | |
EP1784931A2 (en) | Method and apparatus for transparent relaying | |
JP5828891B2 (ja) | 中継局、基地局、送信方法、及び受信方法 | |
JP5813671B2 (ja) | 送信装置、受信装置、送信方法、及び受信方法 | |
TW202041056A (zh) | 通訊裝置及通訊方法 | |
CN109309928B (zh) | D2d链路检测方法、相关装置及系统 | |
KR20180082066A (ko) | 엑스홀 네트워크에서 저지연 서비스를 위한 통신 방법 | |
KR20150088746A (ko) | Lte 이중 연결에서의 베어러 재조립 시스템 | |
JPWO2008050539A1 (ja) | 無線通信装置および無線通信方法 | |
US8743769B2 (en) | Radio communication device and radio communication system | |
US20240080089A1 (en) | System and method for dual-control signaling for the relay scenarios | |
WO2017160506A1 (en) | Providing user equipment feedback via signal forwarding device | |
JP5595425B2 (ja) | 無線中継装置及び無線中継方法 | |
WO2023146717A1 (en) | Techniques for joint ue relay selection and activation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080032624.1 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10806232 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13384846 Country of ref document: US Ref document number: 2010806232 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011525792 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |