WO2010085103A2 - 기지국과 중계기의 협력적 하향링크 전송 방법 및 장치 - Google Patents
기지국과 중계기의 협력적 하향링크 전송 방법 및 장치 Download PDFInfo
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- WO2010085103A2 WO2010085103A2 PCT/KR2010/000399 KR2010000399W WO2010085103A2 WO 2010085103 A2 WO2010085103 A2 WO 2010085103A2 KR 2010000399 W KR2010000399 W KR 2010000399W WO 2010085103 A2 WO2010085103 A2 WO 2010085103A2
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- base station
- cooperative transmission
- transmission data
- cooperative
- repeater
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- 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
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- 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
- H04L1/1854—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- 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
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- 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
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- 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
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- 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
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
Definitions
- the present invention relates to a wireless communication system using a repeater, and more particularly, to a method and apparatus for a base station and a repeater to cooperatively transmit a downlink signal to one terminal.
- a relay station In the next generation wireless communication system, a relay station (RS) is introduced to expand cell coverage and improve data rate.
- RS relay station
- a radio resource between a base station and a repeater in addition to a radio resource consisting of time or frequency between a base station (BS) and a mobile station (MS), a radio resource between a base station and a repeater (BS-RS section) and There is a radio resource between the repeater and the terminal (RS-MS interval).
- BS-RS section a radio resource between a base station and a repeater
- RS-MS interval RS-MS interval
- the base station also improves the reception performance through the diversity effect by transmitting a signal to the terminal through the transmission of the BS-MS using the same radio resources used in the RS-MS transmission, the base station antenna repeater antenna
- An example is the technique of forming one space-time code.
- the repeater In order to apply the above technique, the repeater must have scheduling information corresponding to the data to be transmitted, and in the cooperative transmission method of the base station and the repeater, the cooperative transmission data transmitted from the base station to the repeater must be successfully delivered.
- the repeater if there is no consideration of transmission error of the base station-relay link, if the repeater does not correctly receive the data transmitted by the base station, it wastes radio resources pre-allocated to transmit to the terminal or the base station and the repeater There is a problem that the effective cooperative transmission to the terminal, such as the transmission efficiency to the terminal is reduced and the time delay is long.
- the present invention is to solve the problems of the prior art as described above, by transmitting the scheduling information from the base station to the repeater even if a transmission error of the base station-relay link, the base station and the repeater can perform effective cooperative transmission; Provided are a cooperative downlink transmission method and apparatus for a repeater.
- a cooperative downlink signal transmission method of a base station and a repeater includes: receiving cooperative transmission data transmitted from a base station and transmitting an acknowledgment message thereof to the base station; Receiving scheduling information for cooperative transmission of cooperative transmission data from a base station; And transmitting the cooperative transmission data to the terminal with reference to the scheduling information.
- the method further comprises the step of transmitting a reception error (NACK) message to the base station and receiving the cooperative transmission data from the base station when an error in reception of the cooperative transmission data occurs.
- NACK reception error
- the scheduling information, the subframe index and the resource block location where the cooperative transmission is performed, the precoding scheme for the cooperative transmission, Modulation and Coding Scheme (MCS) information for the cooperative transmission or the cooperative At least one or more types of reference signals used for transmission are included.
- MCS Modulation and Coding Scheme
- receiving scheduling information further comprises transmitting an acknowledgment message of said scheduling information to said base station.
- a cooperative downlink signal transmission method of a base station and a repeater includes: receiving cooperative transmission data transmitted from a base station and scheduling information for cooperative transmission of the cooperative transmission data; Transmitting an acknowledgment message of the cooperative transmission data or the scheduling information to the base station; And transmitting the cooperative transmission data to the terminal with reference to the scheduling information.
- the cooperative transmission data and the scheduling information transmitted from the base station are transmitted at different Modulation and Coding Scheme (MCS) levels.
- MCS Modulation and Coding Scheme
- the cooperative transmission data and the scheduling information transmitted from the base station are transmitted through different channels.
- the scheduling information, the subframe index and the resource block location where the cooperative transmission is performed, the precoding scheme for the cooperative transmission, Modulation and Coding Scheme (MCS) information for the cooperative transmission or the cooperative At least one or more types of reference signals used for transmission are included.
- MCS Modulation and Coding Scheme
- a reception error of the cooperative transmission data transmitted from the base station when a reception error of the cooperative transmission data transmitted from the base station occurs, in the step of transmitting the cooperative transmission data acknowledgment message, a reception error message (NACK) of the cooperative transmission data is transmitted to the base station. and; In the step of transmitting the cooperative transmission data to the terminal, it is characterized in that for processing the cooperative transmission data in which the reception error occurs retransmitted cooperative transmission data to the terminal.
- NACK reception error message
- the cooperative transmission data transmitted to the terminal may be transmitted by adding a message indicating that the modified cooperative transmission data, the modified cooperative transmission data is a simple amplification or reference signal omitting the decoding of the received cooperative transmission data It may be reprocessed through limited decoding processing through reconstruction.
- the method may further include transmitting a NACK message to the base station and retransmitting the scheduling information from the base station when a reception error of the scheduling information transmitted from the base station occurs. It is done.
- a cooperative downlink signal transmission method of a base station and a repeater includes: receiving cooperative transmission data and scheduling information for cooperative transmission of cooperative transmission data transmitted from a base station; Transmitting the cooperative transmission data to a terminal with reference to the scheduling information; And transmitting an acknowledgment message of the cooperative transmission data or the scheduling information to the base station.
- a cooperative downlink signal transmission method of a base station and a repeater includes: receiving cooperative transmission data transmitted from a base station and transmitting an acknowledgment message thereof to the base station; Transmitting scheduling information for cooperative transmission of the cooperative transmission data to the base station; And receiving the scheduling information reception confirmation message from the base station, and transmitting the cooperative transmission data to the terminal.
- the cooperative downlink signal transmission apparatus of a base station and a repeater is a cooperative downlink signal transmission apparatus of a base station and a repeater in a broadband wireless communication system, the cooperative transmission data and the cooperative transmission from the base station
- a receiver for receiving scheduling information of data
- a transmitter for transmitting the cooperative transmission data to a terminal
- a controller for reprocessing the cooperative transmission data.
- the base station transmits the scheduling information from the base station to the repeater, which wastes radio resources pre-allocated to transmit to the terminal or the base station and the repeater cannot effectively cooperatively transmit the terminal.
- the transmission efficiency can be prevented from falling, and there is an effect of solving a problem such as a transmission time delay when transmitting a signal to the terminal.
- FIG. 1 is a diagram illustrating a cooperative downlink transmission process between a base station and a repeater according to an embodiment of the present invention, in which cooperative transmission data and scheduling information are transmitted at a time point when they are separated.
- FIG. 2 is a diagram illustrating another embodiment in which cooperative transmission data and scheduling information are transmitted when they are separated.
- FIG. 3 is a diagram illustrating a cooperative downlink transmission process between a base station and a repeater according to an embodiment of the present invention, in which cooperative transmission data and scheduling information are simultaneously transmitted.
- FIG. 4 illustrates an embodiment in which a repeater fails to decode cooperatively transmitted data, but reprocesses the received data and delivers the received data to the terminal, thereby attempting decoding through proper combining with a signal transmitted from the base station.
- FIG. 5 is an embodiment illustrating a method in which a repeater does not use a corresponding radio resource in order to minimize interference of data transmitted from a base station to a terminal when the repeater fails to decode cooperative transmission data.
- FIG. 6 is an embodiment illustrating a method in which a repeater gives up communication for cooperative transmission with an existing terminal and communicates with a new terminal.
- FIG. 7 illustrates an embodiment of a cooperative transmission method through retransmission of scheduling information.
- FIG. 8 is another embodiment illustrating a cooperative transmission method through retransmission of scheduling information.
- FIG 9 illustrates an example in which the cooperative transmission time indicated in the scheduling information transmitted from the base station to the repeater together with the cooperative transmission data is before the base station receives the ACK message from the repeater.
- FIG. 10 is a diagram illustrating an embodiment of cooperative transmission when a repeater fails to receive data and successfully receives scheduling information.
- FIG. 11 is a diagram illustrating another embodiment of cooperative transmission when a repeater fails to receive data and successfully receives scheduling information.
- FIG. 12 is a diagram illustrating another embodiment of cooperative transmission when a repeater fails to receive data and successfully receives scheduling information.
- FIG. 13 is a diagram illustrating an embodiment of cooperative transmission when a repeater performs scheduling and a terminal receives a control signal from a repeater.
- FIG. 14 is a diagram illustrating another embodiment of cooperative transmission when a repeater performs scheduling and a terminal receives a control signal from a repeater.
- 15 is a block diagram schematically showing the configuration of a cooperative downlink signal transmission apparatus according to an embodiment of the present invention.
- the present invention is applied to a mobile communication system, and particularly to an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from an IEEE802.16m system or a Universal Mobile Telecommunications System (UMTS).
- E-UMTS Evolved Universal Mobile Telecommunications System
- UMTS Universal Mobile Telecommunications System
- the present invention is not limited thereto and may be applied to all communication systems and communication protocols to which the technical spirit of the present invention can be applied.
- first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
- first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.
- the communication system of the present invention includes a base station and a terminal as a system for providing various communication services such as voice and packet data, and is representative of an IEEE802.16m system, a long term evolution (LTE) system, or an LTE-Advanced system.
- LTE long term evolution
- LTE-Advanced LTE-Advanced
- the terminal of the present invention may be referred to as a subscriber station (SS), a user equipment (UE), a mobile equipment (ME), a mobile station (MS), or the like, and communicates with a mobile phone, a PDA, a smart phone, a laptop, or the like.
- SS subscriber station
- UE user equipment
- ME mobile equipment
- MS mobile station
- Portable devices with functions or non-portable devices such as PCs and vehicle-mounted devices.
- the base station of the present invention refers to a fixed point for communicating with the terminal and may be used in terms of an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, and the like.
- eNB evolved-NodeB
- BTS base transceiver system
- One or more cells may exist in one base station, and an interface for transmitting user traffic or control traffic may be used between base stations.
- downlink means a communication channel from the base station to the terminal
- uplink means a communication channel from the terminal to the base station.
- the multiple access scheme applied to the wireless communication system of the present invention includes code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), single carrier-FDMA (SC-FDMA), and OFDMA ( Or multiple access schemes such as Orthogonal Frequency Division Multiple Access) or other known modulation techniques.
- CDMA code division multiple access
- TDMA time division multiple access
- FDMA frequency division multiple access
- SC-FDMA single carrier-FDMA
- OFDMA Orthogonal Frequency Division Multiple Access
- the multiple access schemes for downlink and uplink transmission may be different from each other.
- downlink may use OFDMA technique and uplink may use SC-FDMA technique.
- the terminal may communicate with the base station directly or through a repeater.
- the repeater may attempt to decode the data transmitted from the base station to the terminal, and generate and transmit an ACK / NAK for the data to the base station.
- the terminal transmits the same data or data processed through a process such as precoding to obtain diversity, and the base station and the repeater transmit the two signals to the terminal through the same radio resource. It can be combined properly.
- the data may be transmitted through another radio resource, and information about which radio resource each data utilizes may also be transmitted to the terminal so that the terminal may appropriately combine the two signals.
- the point of time and location of the resource to be transmitted by the relay for example, the location of subframe index and resource block for cooperative transmission
- the precoding method, the MCS (modulation and coding scheme) to be used, and the reference used for cooperative transmission Scheduling information such as signal type should be exchanged between the base station and the repeater.
- the combinations of the order in which various signals are transmitted between the base station, the repeater, and the terminal for the cooperative communication between the base station and the repeater will be enumerated and described.
- the speed at which a receiving terminal of the cooperative transmission channel changes is appropriately considered. For example, when a cooperative transmission time is delayed for a terminal whose channel changes at a high speed, performance deterioration occurs due to a channel change. Therefore, a method having a small time delay until the cooperative transmission time is selected, and accordingly, a cooperative transmission time is determined accordingly. It is desirable to. On the contrary, it is desirable to select a method that can operate reliably even if the time delay until the cooperative transmission is long for a terminal having a slow channel change rate.
- FIG. 1 is a diagram illustrating a cooperative downlink transmission process between a base station and a repeater according to an embodiment of the present invention, in which cooperative transmission data and scheduling information are transmitted at a time point when they are separated.
- the base station transmits cooperative transmission data to the repeater (S101).
- the repeater transmits an acknowledgment message on whether the cooperative transmission data transmitted from the base station is normally received to the base station, and when an error occurs in the received data, transmits a NACK message to the base station (S103).
- the base station receiving the NACK message retransmits the data to the repeater (S105), and when the retransmitted data is normally received, the repeater transmits the ACK message to the base station (S107).
- the base station After the base station receives the ACK message for the cooperative transmission data from the repeater for stable cooperative transmission between the base station and the repeater, the base station transmits scheduling information for cooperative transmission of the corresponding data to the repeater (S109).
- the scheduling information includes a time point and a location of a resource to be transmitted by a relay (for example, a location of a subframe index and a resource block for cooperative transmission), a precoding method, a modulation and coding scheme (MCS) to be used, and a type of reference signal used for cooperative transmission. And the like.
- a relay for example, a location of a subframe index and a resource block for cooperative transmission
- MCS modulation and coding scheme
- the repeater receives the ACK message for the corresponding scheduling information to the base station (S111), and then the base station and the repeater together transmit the data to the terminal to perform cooperative transmission (S117, S119). At this time, the repeater transmits the cooperative transmission data according to the scheduling information received in step S109 (S117).
- FIG. 2 is a diagram illustrating another embodiment in which cooperative transmission data and scheduling information are transmitted when they are separated.
- the base station receives an ACK message from the repeater for stable cooperative transmission between the base station and the repeater for cooperative transmission data transmitted to the repeater, and then transmits scheduling information for cooperative transmission of the corresponding data to the repeater. (S109).
- the base station does not receive the ACK / NACK message feedback on the scheduling information, and performs cooperative transmission on the corresponding data with the repeater. That is, the repeater transmits the cooperative transmission data according to the scheduling information without transmitting the ACK / NACK for the scheduling information of the cooperative transmission data transmitted to the terminal (S217).
- the scheduling information of this embodiment is preferably transmitted in a sufficient modulation and coding scheme (MCS) so that the terminal receiving the cooperative transmission data has a high probability of successfully receiving.
- MCS modulation and coding scheme
- FIG. 3 is a diagram illustrating a cooperative downlink transmission process between a base station and a repeater according to an embodiment of the present invention, in which cooperative transmission data and scheduling information are simultaneously transmitted.
- the base station transmits cooperative transmission data and scheduling information for cooperative transmission of the data to the repeater (S301).
- the repeater transmits an acknowledgment message indicating whether the cooperative transmission data and the scheduling information transmitted from the base station are normally received to the base station, and when receiving the normal transmission, transmits an ACK message to the base station (S303).
- the cooperative transmission time indicated in the scheduling information transmitted from the base station to the repeater together with the cooperative transmission data is preferably after the point of time when the base station receives the ACK message from the repeater. That is, it is preferable that a sufficient time for the cooperative transmission to be made after the base station decodes the cooperative transmission data and the scheduling information and the base station receives the response of the repeater is specified in the scheduling information.
- the base station can know whether the repeater correctly received the cooperative transmission data before performing the cooperative transmission with the repeater. Accordingly, it is possible for the base station to perform different operations depending on whether the data transmitted from the repeater is ACK / NACK or ACK / NACK for the scheduling information.
- the scheduling information includes a time point and a location of a resource to be transmitted by a relay (for example, a location of a subframe index and a resource block for cooperative transmission), a precoding method, a modulation and coding scheme (MCS) to be used, and a type of reference signal used for cooperative transmission. And the like.
- a relay for example, a location of a subframe index and a resource block for cooperative transmission
- MCS modulation and coding scheme
- the base station and the repeater together transmit the cooperative transmission data to the terminal to perform cooperative transmission (S317 and S319).
- the repeater transmits cooperative transmission data according to the scheduling information received in step S301 (S317).
- 4 to 8 illustrate modified embodiments according to whether ACK / NACK is performed on data and scheduling information when cooperative transmission data and scheduling information are simultaneously transmitted.
- FIG. 4 illustrates an embodiment in which a repeater fails to decode cooperatively transmitted data, but reprocesses the received data and delivers the received data to the terminal, thereby attempting decoding through proper combining with a signal transmitted from the base station.
- the repeater transmits a confirmation message to the base station whether the cooperative transmission data and the scheduling information transmitted from the base station are normally received, and the cooperative transmission data has received a reception error, and the scheduling information is normally received. And transmits a scheduling information reception ACK message to the base station (S403).
- the repeater reprocesses the cooperative transmission data received from the base station and transmits the correction data to the terminal (S417), and the base station transmits the cooperative transmission data to the terminal (S319) and performs cooperative transmission.
- the repeater In order to operate in the above manner, the repeater must receive the scheduling information successfully even though the cooperative transmission data fails to be received.
- the scheduling information is set to a lower transmission rate MCS to increase the reliability while the cooperative transmission data improves the transmission efficiency. In order to maximize, it can be set to a relatively high data rate MCS.
- the base station may transmit the scheduling information more reliably through a control channel separate from the cooperative transmission data.
- the base station or the repeater may set the appropriate field of the control channel delivered to the terminal to inform the terminal that the signal transmitted from the repeater has reprocessed failed reception information. Accordingly, the terminal may appropriately combine the signal transmitted from the base station and the reprocessed signal transmitted from the repeater using the above information.
- the diversity gain can be obtained by appropriately utilizing the reprocessed information received from the repeater without wasting the radio resources allocated to the repeater.
- the repeater reprocess the received data in error. If the MCS between BS-RS and MCS between RS-MS are the same, the received signal may be amplified-and-forwarded without being decoded or retransmitted after only limited processing. For example, the reference signal part between the BS-RS links may be removed, and the RS may be reinserted while the reference signal of the RS is newly inserted, or the demodulation result may be transmitted without a hard decision. However, in general, since the channel characteristics of the BS-RS section and the RS-MS section may be different, the transmission is preferably performed in another MCS.
- the suggested reprocessing methods are as follows.
- the repeater decodes the received signal into an information packet, obtains a first probability sequence representing probability information of each information bit constituting the information packet, and then encodes the information packet into an MCS for an RS-MS interval.
- a code packet may be obtained, and a second probability sequence representing probability information of each code bit constituting the code packet may be obtained using the first probability sequence.
- a modulation symbol may be configured and transmitted to the terminal using the second probability sequence.
- FIG. 5 is an embodiment illustrating a method in which a repeater does not use a corresponding radio resource in order to minimize interference of data transmitted from a base station to a terminal when the repeater fails to decode cooperative transmission data.
- the repeater transmits a confirmation message to the base station whether the cooperative transmission data and the scheduling information transmitted from the base station are normally received, and the cooperative transmission data has received a reception error, and the scheduling information is normally received. And transmits a scheduling information reception ACK message to the base station (S403).
- the repeater finds the radio resource allocated to the cooperative transmission from the received scheduling information and does not use the corresponding radio resource in order to minimize the transmission and reception interference of the cooperative transmission data transmitted from the base station to the terminal (S517).
- the base station since the repeater does not transmit to the terminal, the base station performs independent transmission instead of cooperative transmission (S519). Therefore, preferably, the base station can change the MCS, precoding scheme, etc. used for data transmission for the purpose of transmission efficiency.
- FIG. 6 is an embodiment illustrating a method in which a repeater gives up communication for cooperative transmission with an existing terminal and communicates with a new terminal (S617).
- the repeater does not use the scheduling information received from the base station.
- the base station since the repeater does not transmit to the corresponding terminal, the base station performs independent transmission instead of cooperative transmission as in the embodiment of FIG. 5, and thus the base station may change the MCS, precoding scheme, etc. used for data transmission.
- One operation of the base station among the three embodiments of FIGS. 4, 5, and 6 described above may be defined as a communication standard or may be determined in advance through signal exchange between the base station and the repeater.
- the repeater when the repeater transmits an ACK / NACK message to the base station, it may inform the base station of an operation (S417, S517 or S617) to be performed by the repeater by adding a field indicating which operation to perform during the operation to the message.
- the base station when the base station receives the ACK for the cooperative transmission data, the NACK message for the scheduling information from the repeater, retransmission only scheduling information for the cooperative transmission to the repeater may retry the cooperative transmission.
- FIG. 7 illustrates an embodiment of a cooperative transmission method through retransmission of scheduling information.
- the repeater normally receives the cooperative transmission data received from the base station, but the scheduling information transmits a NACK message to the base station when a reception error occurs (S703).
- the base station retransmits scheduling information for cooperative transmission of the corresponding data to the repeater (S705).
- the relay receives the received ACK message for the corresponding scheduling information to the base station (S707), and after the base station receives the base station and the repeater together with the base station and performs the cooperative transmission of the corresponding data (S717, S719).
- 8 is another embodiment showing a cooperative transmission method through retransmission of scheduling information.
- the repeater when the base station retransmits scheduling information for cooperative transmission of the corresponding data to the repeater (S805), the repeater performs cooperative transmission to the terminal without transmitting the ACK / NACK message for the scheduling information to the base station (S717). ).
- the repeater when the repeater does not transmit the feedback about the scheduling information to the base station, it may be able to perform cooperative transmission at a faster time point than in the embodiment of FIG. 7.
- the cooperative transmission method according to the embodiment of FIG. 8 may be applied when a cooperative transmission time appears before receiving an ACK / NACK message for retransmission of scheduling information.
- the scheduling information is preferably transmitted to the MCS sufficient to be successfully received by the repeater.
- the base station when the base station simultaneously transmits the cooperative transmission data and the scheduling information to the repeater with reference to FIGS. 3 to 8, various embodiments have been described. However, the base station first transmits the scheduling information to the relay and then transmits the cooperative transmission data.
- the cooperative transmission scheme of the present invention may be applied as a transmission method.
- the repeater when the base station transmits scheduling information to the repeater first and receives an ACK for it, and then transmits cooperative transmission data, the repeater fails to receive the cooperative transmission data and transmits a NACK message to the base station. It corresponds to the same situation as NACK for data and ACK for scheduling information described with reference to FIGS. 5 and 6.
- the base station and the repeater may take one of the three operations described in FIGS. 4, 5 and 6 in this case.
- the cooperative transmission time indicated in the scheduling information transmitted from the base station to the repeater together with the cooperative transmission data is at or before the base station receives the ACK / NAK from the repeater.
- the repeater receiving cooperative transmission data and scheduling information from the base station transmits cooperative transmission data to the terminal according to the scheduling information received before the transmission of the ACK / NACK message thereto (S917). And then transmits an ACK message to the base station (S921).
- the base station may need a lot of time to wait for the ACK / NACK for the scheduling information or the ACK / NACK
- the following method may be effective as it may be difficult to predict when to be transmitted.
- the cooperative transmission time point may be earlier than the ACK / NAK transmission time point of the repeater, but is preferably set later than the completion time of the decoding of the repeater.
- the base station since the base station attempts cooperative transmission before receiving the ACK / NAK from the repeater, the base station cannot know whether the repeater correctly receives the cooperative transmission data before performing the cooperative transmission with the repeater.
- the base station and the repeater may perform operations as shown in FIGS. 10 to 12.
- FIG. 10 is a diagram illustrating an embodiment of cooperative transmission when a repeater fails to receive data and successfully receives scheduling information.
- the repeater fails to decode the cooperative data, but reprocesses the received information and transmits the received information to the terminal (S1017), and the terminal through an appropriate combination of the signal transmitted from the base station and the modified signal of the reprocessed repeater. Perform decoding.
- the repeater In order to operate in this way, the repeater must receive the scheduling information successfully even if the cooperative transmission data fails to be received.
- the scheduling information is set to a lower transmission rate MCS to increase the reliability while the cooperative transmission data maximizes the transmission efficiency.
- a relatively high data rate MCS may be set.
- the base station may transmit the scheduling information more reliably through a control channel separate from the cooperative transmission data.
- it is possible to inform the terminal that the signal transmitted from the repeater has reprocessed failed reception information by setting an appropriate field of the control channel transmitted to the repeater.
- the terminal may appropriately combine the signal transmitted from the base station and the reprocessed signal transmitted from the repeater using this information.
- the diversity gain can be obtained by allowing the terminal to properly use the reprocessed information received from the repeater without wasting the radio resources allocated to the repeater.
- FIG. 11 is a diagram illustrating another embodiment of cooperative transmission when a repeater fails to receive data and successfully receives scheduling information.
- the repeater determines the radio resource allocated to the cooperative transmission from the scheduling information received from the base station, and the repeater does not use the radio resource to minimize the interference of the cooperative transmission data transmitted from the base station to the terminal ( S1117).
- the base station since the repeater does not transmit to the corresponding terminal, the base station transmits alone instead of cooperative transmission (S1121). Therefore, the base station may transmit the cooperative transmission data to the terminal alone by changing the MCS, precoding scheme, etc. used for data transmission.
- FIG. 12 is a diagram illustrating another embodiment of cooperative transmission when a repeater fails to receive data and successfully receives scheduling information.
- the repeater gives up communication for cooperative data transmission with the existing terminal and performs communication with the new terminal (S1217). Therefore, the repeater does not use the scheduling information received from the base station.
- the base station since the repeater does not transmit to the terminal, the base station transmits exclusively instead of cooperative transmission (S1121). Therefore, the base station may transmit the cooperative transmission data to the terminal alone by changing the MCS, precoding scheme, etc. used for data transmission.
- the repeater If the repeater succeeds in receiving data and fails in receiving scheduling information, the repeater communicates with other terminals as shown in FIG. 12, and the base station transmits alone. Therefore, the base station may change the MCS, precoding scheme, etc. used for data transmission. In addition, as in the embodiments of FIGS. 11 and 12, since the base station does not know that it transmits alone, the base station may not recognize that the MCS, precoding scheme, etc. used for data transmission should be changed. However, in this case, it can be overcome by using the existing HARQ scheme or by assigning a dedicated reference signal.
- the present invention also relates to a process of transmitting a scheduling information to a repeater first and then cooperative transmission data.
- the base station transmits scheduling information to the repeater first, receives an ACK for it, and then transmits cooperative transmission data.
- 10 corresponds to a situation in which data reception failure and scheduling information reception success described with reference to FIGS. 10, 11, and 12 are successful.
- the base station and the repeater may take one of the three operations described in FIGS. 10, 11 and 12 in this case.
- Repeater performs scheduling / Terminal receives control signal from repeater
- the repeater since the terminal receives the schedule from the repeater and receives the data, the repeater assumes a situation after successfully receiving the data from the base station prior to the cooperative transmission. However, the base station keeps the data that may be cooperatively transmitted from the repeater for a predetermined time without deleting the data even when receiving the ACK for the data from the repeater. For this operation, a time for which the base station should store data that may be cooperatively transmitted may be defined, and this time information may be exchanged between signaling between the base station and the repeater. In this situation where the base station and the repeater share data, the repeater should transmit scheduling information on which radio resources the base station should use for cooperative transmission. In this case, the base station may be further divided into two embodiments of FIG. 13 or FIG. 14 according to whether there is an ACK for scheduling information received from the repeater.
- FIG. 13 is a diagram illustrating an embodiment of cooperative transmission when a repeater performs scheduling and a terminal receives a control signal from a repeater.
- the base station transmits cooperative transmission data to a repeater (S1301), and receives an ACK message for receiving the cooperative transmission data from the repeater (S1303).
- the base station even when the base station receives the ACK message for the data from the repeater, the base station stores the cooperative transmission target data without deleting the data for a predetermined time.
- the repeater transmits scheduling information on which radio resource the base station should perform cooperative transmission to the base station (S1305).
- the base station transmits an acknowledgment (ACK) for the scheduling information transmitted from the repeater to the repeater (S1307).
- ACK acknowledgment
- the base station and the repeater After the repeater receives the ACK message from the base station, the base station and the repeater perform cooperative transmission together (S1317 and S1319).
- FIG. 14 is a diagram illustrating another embodiment of cooperative transmission when a repeater performs scheduling and a terminal receives a control signal from a repeater.
- the base station after the base station receives the scheduling information transmitted from the repeater, in the present embodiment, the base station does not ACK / NACK a response to the scheduling information and utilizes radio resources allocated from the scheduling information. Perform cooperative transmission together.
- the scheduling information S1405 transmitted by the repeater to the base station is increased by setting the transmission rate to a lower transmission rate MCS compared to the scheduling information S1305 transmitted in the embodiment of FIG. 13.
- the repeater may also transmit scheduling information to the base station while transmitting an ACK message for the data received from the base station.
- 15 is a block diagram schematically illustrating a configuration of a cooperative downlink transmission apparatus according to an embodiment of the present invention.
- the apparatus includes a receiver 1501, a transmitter 1503 and a controller 1505.
- the receiver 1501 receives the cooperative transmission data and the scheduling information of the cooperative transmission data from the base station.
- the transmitter 1503 transmits cooperative transmission data received from the base station to the terminal.
- the controller 1505 controls the receiver 1501 and the transmitter 1503, determines whether the cooperative transmission data or the scheduling information has a reception error, and when the reception error of the cooperative transmission data occurs, the cooperative transmission data in which an error occurs. Reprocessing may generate modified cooperative transmission data.
- the controller 1505 generates modified cooperative transmission data through limited decoding processing through simple amplification or reference signal reconstruction that omits decoding of cooperative transmission data received from the base station.
- the method according to the invention described thus far can be implemented in software, hardware, or a combination thereof.
- the method according to the present invention may be stored in a storage medium (eg, terminal internal memory, flash memory, hard disk, etc.) and executed by a processor (eg, terminal internal microprocessor). It may be implemented as codes or instructions within a software program that can be.
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Abstract
Description
Claims (15)
- 광대역 무선통신 시스템에서 기지국과 중계기의 협력적 하향링크 신호 전송 방법에 있어서,상기 기지국으로부터 전송되는 협력전송 데이터를 수신하고 이에 대한 수신확인 메시지를 상기 기지국으로 전송하는 단계;상기 기지국으로부터 상기 협력전송 데이터의 협력전송을 위한 스케쥴링(Scheduling) 정보를 수신하는 단계; 및상기 스케쥴링 정보를 참조하여 상기 협력전송 데이터를 단말로 송신하는 단계를 포함하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 1항에 있어서, 상기 협력전송 데이터의 수신 오류가 발생한 경우,수신오류(NACK) 메시지를 상기 기지국으로 전송하고, 상기 기지국으로부터 상기 협력전송 데이터를 재전송 받는 단계를 더 포함하는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 1항에 있어서, 상기 스케쥴링 정보는,상기 협력전송이 이루어지는 서브프레임 인덱스 및 자원블록 위치, 상기 협력전송을 위한 precoding 방식, 상기 협력전송을 위한 MCS(Modulation and Coding Scheme) 정보 또는 상기 협력전송에 사용되는 기준신호의 종류 중 적어도 하나 이상이 포함되는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 1항에 있어서, 상기 스케쥴링 정보를 수신하는 단계는,상기 스케쥴링 정보의 수신확인 메시지를 상기 기지국으로 전송하는 단계를 더 포함하는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 광대역 무선통신 시스템에서 기지국과 중계기의 협력적 하향링크 신호 전송 방법에 있어서,상기 기지국으로부터 전송되는 협력전송 데이터 및 상기 협력전송 데이터의 협력전송을 위한 스케쥴링(Scheduling) 정보를 수신하는 단계;상기 협력전송 데이터 또는 상기 스케쥴링 정보의 수신확인 메시지를 상기 기지국으로 전송하는 단계; 및상기 스케쥴링 정보를 참조하여 상기 협력전송 데이터를 단말로 송신하는 단계를 포함하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 5항에 있어서, 상기 기지국으로부터 전송되는 협력전송 데이터 및 상기 스케쥴링 정보는 서로 다른 MCS(Modulation and Coding Scheme)레벨로 전송되는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 5항에 있어서, 상기 기지국으로부터 전송되는 협력전송 데이터 및 상기 스케쥴링 정보는 서로 다른 채널을 통해서 전송되는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 5항에 있어서, 상기 스케쥴링 정보는,상기 협력전송이 이루어지는 서브프레임 인덱스 및 자원블록 위치, 상기 협력전송을 위한 precoding 방식, 상기 협력전송을 위한 MCS(Modulation and Coding Scheme) 정보 또는 상기 협력전송에 사용되는 기준신호의 종류 중 적어도 하나 이상이 포함되는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 5항에 있어서, 상기 기지국으로부터 전송되는 협력전송 데이터의 수신 오류가 발생한 경우,상기 협력전송 데이터 수신확인 메시지 전송 단계에서는, 상기 협력전송 데이터의 수신 오류 메시지(NACK)를 상기 기지국으로 전송하고;상기 협력전송 데이터를 단말로 송신하는 단계에서는, 상기 수신 오류가 발생한 협력전송 데이터를 재가공하여 수정된 협력전송 데이터를 상기 단말로 송신하는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 9항에 있어서,상기 단말로 전송되는 협력전송 데이터는 상기 수정된 협력전송 데이터인 것을 나타내는 메시지를 추가하여 전송하는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 9항에 있어서, 상기 수정된 협력전송 데이터는,수신된 협력전송 데이터의 복호를 생략한 단순 증폭 또는 기준신호 재구성을 통한 제한적 복호 처리를 통하여 재가공된 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 제 5항에 있어서, 상기 기지국으로부터 전송되는 스케쥴링 정보의 수신 오류가 발생한 경우,수신오류(NACK) 메시지를 상기 기지국으로 전송하고, 상기 기지국으로부터 상기 스케쥴링 정보를 재전송 받는 단계를 더 포함하는 것을 특징으로 하는 중계기의 협력적 하향링크 신호 전송 방법.
- 광대역 무선통신 시스템에서 기지국과 중계기의 협력적 하향링크 신호 전송 방법에 있어서,상기 기지국으로부터 전송되는 협력전송 데이터 및 상기 협력전송 데이터의 협력전송을 위한 스케쥴링(Scheduling) 정보를 수신하는 단계;상기 스케쥴링 정보를 참조하여 상기 협력전송 데이터를 단말로 송신하는 단계; 및상기 협력전송 데이터 또는 상기 스케쥴링 정보의 수신확인 메시지를 상기 기지국으로 전송하는 단계를 포함하는 중계기의 협력적 하향링크 신호 전송 방법.
- 광대역 무선통신 시스템에서 기지국과 중계기의 협력적 하향링크 신호 전송 방법에 있어서,상기 기지국으로부터 전송되는 협력전송 데이터를 수신하고 이에 대한 수신확인 메시지를 상기 기지국으로 전송하는 단계;상기 협력전송 데이터의 협력전송을 위한 스케쥴링(Scheduling) 정보를 상기 기지국으로 전송하는 단계; 및상기 기지국으로부터 상기 스케쥴링 정보 수신 확인 메시지를 수신하고, 상기 협력전송 데이터를 단말로 송신하는 단계를 포함하는 중계기의 협력적 하향링크 신호 전송 방법.
- 광대역 무선통신 시스템에서 기지국과 중계기의 협력적 하향링크 신호 전송 장치에 있어서,상기 기지국으로부터 협력전송 데이터 및 상기 협력전송 데이터의 스케쥴링 정보를 수신하는 수신기;상기 협력전송 데이터를 단말로 전송하는 송신기; 및상기 협력전송 데이터 또는 상기 스케쥴링 정보의 수신오류 여부를 판단하고, 상기 협력전송 데이터의 수신오류가 발생한 경우 수신된 협력전송 데이터의 복호를 생략한 단순 증폭 또는 기준신호 재구성을 통한 제한적 복호 처리를 통하여 상기 협력전송 데이터를 재가공하는 제어기를 포함하는 협력적 하향링크 신호 전송 장치.
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US13/145,553 US8619663B2 (en) | 2009-01-22 | 2010-01-21 | Apparatus and method for cooperatively transmitting downlink between base station and relay station |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9112575B2 (en) * | 2009-03-12 | 2015-08-18 | Futurewei Technologies, Inc. | System and method for smart relay operation in a wireless communications system |
CN101882978A (zh) * | 2009-05-04 | 2010-11-10 | 中兴通讯股份有限公司 | 一种中继站下行协作重传的方法和装置 |
CN101895925B (zh) | 2009-05-22 | 2014-11-05 | 中兴通讯股份有限公司 | 一种实现中继站下行协作重传的方法及中继站 |
CN103959824B (zh) * | 2011-11-08 | 2018-05-11 | 华为技术有限公司 | 用于数据转发的系统和方法 |
KR101451420B1 (ko) * | 2012-07-25 | 2014-10-16 | 주식회사 케이티 | 자원할당 방법 및 장치 |
KR101693394B1 (ko) * | 2012-10-09 | 2017-01-17 | 한국전자통신연구원 | 협력통신 기반의 이동통신 시스템 및 방법 |
US9287964B2 (en) * | 2013-03-11 | 2016-03-15 | Intel Corporation | Millimeter-wave relay device with bounded delay and method for retransmission of symbols |
US9603160B2 (en) * | 2014-05-22 | 2017-03-21 | Nokia Solutions And Networks Oy | Method and apparatus for uplink backhaul scheduling |
CN107211339B (zh) * | 2015-08-12 | 2020-05-08 | 华为技术有限公司 | 一种数据传输方法、用户设备和基站 |
WO2017155332A2 (ko) * | 2016-03-09 | 2017-09-14 | 엘지전자 주식회사 | 무선 통신 시스템에서 멀티캐스트 신호를 수신하는 방법 및 이를 위한 장치 |
WO2018202934A1 (en) * | 2017-05-02 | 2018-11-08 | Airo Finland Oy | Elimination of latency in a communication channel |
FR3078459B1 (fr) * | 2018-02-23 | 2020-03-06 | Orange | Procede et systeme omamrc de transmission avec adaptation lente de lien sous contrainte d'un bler |
EP4072211A4 (en) * | 2019-12-26 | 2022-12-07 | Huawei Technologies Co., Ltd. | COMMUNICATION METHOD AND DEVICE |
CN113301502B (zh) * | 2021-05-12 | 2022-01-28 | 南京源兴智达信息科技有限公司 | 一种基于多基站协作的无线通信系统和方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080175183A1 (en) * | 2007-01-22 | 2008-07-24 | Natasha Devroye | Asymmetric Cooperation in Downlink Cellular Networks with Relay stations |
US20080274692A1 (en) * | 2005-11-29 | 2008-11-06 | Peter Larsson | Scheduling in a Wireless Multi-Hop Relay Network |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5406569A (en) * | 1991-10-31 | 1995-04-11 | Sony Corporation | Error correcting apparatus for digital data and digital synchronizing detecting apparatus |
US20040218683A1 (en) * | 2003-05-01 | 2004-11-04 | Texas Instruments Incorporated | Multi-mode wireless devices having reduced-mode receivers |
US8098601B2 (en) * | 2007-03-23 | 2012-01-17 | Research In Motion Limited | Slow adaptation of modulation and coding for packet transmission |
EP3291459A1 (en) * | 2008-01-02 | 2018-03-07 | InterDigital Technology Corporation | Method and apparatus for cooperative wireless communications |
US8295395B2 (en) * | 2008-09-30 | 2012-10-23 | Apple Inc. | Methods and apparatus for partial interference reduction within wireless networks |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080274692A1 (en) * | 2005-11-29 | 2008-11-06 | Peter Larsson | Scheduling in a Wireless Multi-Hop Relay Network |
US20080175183A1 (en) * | 2007-01-22 | 2008-07-24 | Natasha Devroye | Asymmetric Cooperation in Downlink Cellular Networks with Relay stations |
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