WO2007128219A1 - Procédé de relais, station de base, dispositif de relais et système de relais d'un système d'accès sans fil - Google Patents

Procédé de relais, station de base, dispositif de relais et système de relais d'un système d'accès sans fil Download PDF

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Publication number
WO2007128219A1
WO2007128219A1 PCT/CN2007/001418 CN2007001418W WO2007128219A1 WO 2007128219 A1 WO2007128219 A1 WO 2007128219A1 CN 2007001418 W CN2007001418 W CN 2007001418W WO 2007128219 A1 WO2007128219 A1 WO 2007128219A1
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WO
WIPO (PCT)
Prior art keywords
relay
downlink
uplink
base station
relay station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/001418
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English (en)
French (fr)
Inventor
Wei Zou
Gang Shen
Jiang Qi
Jimin Liu
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Alcatel Lucent SAS
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Alcatel Lucent SAS
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Filing date
Publication date
Application filed by Alcatel Lucent SAS filed Critical Alcatel Lucent SAS
Priority to US12/298,210 priority Critical patent/US8929272B2/en
Priority to KR1020087026260A priority patent/KR101356589B1/ko
Priority to EP07720991.4A priority patent/EP2015470A4/en
Publication of WO2007128219A1 publication Critical patent/WO2007128219A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603Arrangements for wireless physical layer control
    • H04B7/2606Arrangements for base station coverage control, e.g. by using relays in tunnels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • H04B7/15507Relay station based processing for cell extension or control of coverage area
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • H04B7/15528Control of operation parameters of a relay station to exploit the physical medium
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/08Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention generally relates to a wireless access system, and more particularly to a service relay method for a wireless access system and a base station, a relay device, and a relay system using the same.
  • WiMAX Microwave Access Global Interoperability
  • WiMAX IEEE 802.16, as the next-generation wireless broadband access technology, has access capabilities comparable to wired high-speed data access technologies. It supports a variety of services by providing a line-of-sight (using 10-66 GHz band) or non-line-of-sight (using the 2-l lGHz band) between the base station and the user, including voice and video. High real-time business. Since WiMAX systems operate at higher frequencies above 2 GHz, they typically require a line-of-sight transmission environment. This greatly limits the coverage of WiMAX systems. This situation is exacerbated in the densely populated urban environment, and its complex wireless communication environment not only reduces coverage, but also creates many blind spots.
  • Wireless Multi-Hop Relay is a new working group established by the IEEE in March 2006.
  • the main purpose of this working group is to define a multi-hop extension of IEEE 802.16 to enable WiMAX systems to support wireless multi-hop relay.
  • the purpose of wireless multi-hop relay is to further increase the throughput of the system or expand the system coverage without affecting the user equipment. It requires that all modifications be based on IEEE 802.16e, and that all modifications are limited to base stations and relay stations, and cannot modify IEEE 802.16e user equipment. Since IEEE 802.16e only covers the physical layer (PHY) and the medium access control layer (MAC), all modifications are only made at these two layers.
  • PHY physical layer
  • MAC medium access control layer
  • the project authorization requirements (PAR) of the MMR Working Group clearly define the following three points: (1) The relay station (RS) must be transparent to the client equipment; (2) the RS should be much smaller than the base station; (3) The multi-hop frame structure must be based on orthogonal frequency division multiple access (OFDMA) techniques.
  • OFDMA orthogonal frequency division multiple access
  • Figures 1A and 1B depict a basic IEEE 802.16 relay scenario, and Figure 1A schematically illustrates a throughput enhanced scenario; Figure 1B schematically illustrates a coverage extension scenario.
  • the same reference numerals identify the same or similar devices.
  • only one mobile station as an exemplary wireless communication terminal is shown in the figures. It can be understood that, in actual situations, there may be multiple wireless communication terminals simultaneously in the throughput enhanced scenario shown in Figure A or the overlay extended scenario shown in Figure 1B.
  • the wireless communication terminal is not limited to a mobile station, and may be a terminal device having a wireless communication function such as a personal digital assistant (PDA), a pager, a notebook computer, a portable device, or the like.
  • PDA personal digital assistant
  • a mobile station (MS) 103 as an exemplary wireless communication terminal is located within the coverage of a base station (BS) 101, which is capable of directly receiving information broadcast by the base station 101.
  • BS base station
  • the traffic flow between the mobile station 103 and the base station 101 can also be forwarded through the relay station (RS) 102. It has been proved that accessing a wireless communication terminal in this way can effectively increase the throughput of the system under certain conditions.
  • the mobile station 103 which is an exemplary wireless communication device, is located outside the coverage of the base station 101, and is unable to directly receive all of the control information broadcast by the base station 101.
  • the relay station 102 can have a higher transmission power and receiver sensitivity than a normal wireless communication terminal, and can establish a good connection with the base station. Therefore, the mobile station 103 that is outside the coverage of the base station 101 but is within the coverage of the relay station 102 can complete the traffic transmission with the base station 101 through the relay station 102.
  • IEEE 802.16 has described two application scenarios for wireless multi-hop relay (MMR) systems, it is currently only proposed that relay stations should be able to relay various types of traffic flows between upstream and downstream.
  • MMR wireless multi-hop relay
  • the important issues to be addressed are: How to relay traffic between the base station and the wireless device, and how to control this relay process. Summary of the invention
  • the object of the present invention is to provide a basic solution for service relay and control of a WiMAX multi-hop relay system in view of the technical problems unsolved in the prior art.
  • a relay method in a wireless access system comprising the steps of: receiving downlink data from a base station in a downlink direction, where the downlink data packet
  • the control information for the relay operation is constructed; the downlink data to be retransmitted is constructed; the constructed downlink data is retransmitted to each wireless communication terminal according to the configuration specified by the control information; and in the uplink direction, according to the control information
  • the configuration receives uplink data from the wireless communication terminals; recovers uplink data of each wireless communication terminal; and retransmits uplink data to the base station according to the configuration specified by the control information.
  • a base station device including: a transmitting device, configured to send downlink data to a relay station; and a sending processing device, configured to add control information for controlling a relay operation to downlink data to be sent; The device is configured to receive uplink data that is retransmitted by the relay station.
  • a relay apparatus including: a downlink receiving apparatus, configured to receive downlink data from a base station, where the downlink data includes control information for a relay operation; and a downlink processing apparatus, configured to construct Downlink data to be retransmitted; a downlink transmitting apparatus, configured to retransmit the constructed downlink data to each wireless communication terminal according to a configuration specified by the control information; and an uplink receiving apparatus, configured to receive according to a configuration specified by the control information Uplink data from each of the wireless communication terminals; an uplink processing device for recovering uplink data of each wireless communication terminal; and an uplink transmitting device, configured to resend uplink data to the base station according to a configuration specified by the control information .
  • a wireless relay system comprising a base station device according to the present invention and a relay device according to the present invention.
  • the present invention provides a solution to the relay process of the existing IEEE 802.16 wireless multi-hop relay (MMR) system.
  • MMR wireless multi-hop relay
  • the base station can centrally control the entire wireless multi-hop relay system, effectively simplifying the complexity of the relay device, and enabling transparent transmission to the wireless communication terminal.
  • the relay device only needs to copy or construct mapping information transmitted in the coverage extended scenario to control the communication operation of the wireless communication terminal, and simply and effectively solves the problem that when the wireless communication terminal is in the coverage area of the base station External control information transfer problems.
  • FIG. 1A and 1B depict a basic IEEE 802.16 relay scenario, wherein FIG. 1A schematically illustrates a throughput enhanced scenario and FIG. 1B schematically illustrates a coverage extended scenario.
  • Scenery
  • FIG. 3 is a schematic diagram showing a transmission process of relay control information according to an embodiment of the present invention
  • FIG. 4 is a flow chart showing a relay method of a wireless access system according to an embodiment of the present invention
  • FIG. 5 is a flow chart showing a relay method of a wireless access system according to another embodiment of the present invention.
  • FIG. 6 is a flow chart showing a relay method of a wireless access system according to another embodiment of the present invention.
  • FIG. 7 is a flow chart showing a relay method of a wireless access system according to another embodiment of the present invention.
  • Figure 8 is a schematic illustration of a base station device in accordance with one embodiment of the present invention.
  • FIG. 9 schematically illustrates a relay device in accordance with one embodiment of the present invention. detailed description
  • all control and scheduling functions may be performed by the base station.
  • the base station is responsible for allocating bandwidth resources for the uplink and downlink services of the relay station and the wireless communication terminal (e.g., each mobile station) as the user, and coordinating the communication between the relay station and each mobile station.
  • This centralized control method can greatly reduce the complexity of the relay station and reduce its cost. Since the line-of-sight transmission channel is provided between the base station and the relay station, the quality of the communication connection between the relay station and the base station can be ensured.
  • the wireless communication terminal is located within the coverage of the base station and can directly receive all control information broadcast by the base station. Therefore, preferably, the relay station can only forward (relay) the traffic flow between the base station and the wireless communication terminal to increase the throughput of the system. This can greatly reduce the complexity of the relay station in this scenario.
  • the wireless communication terminal is located outside the coverage of the base station, and it cannot receive all control information broadcast by the base station. Therefore, the relay station must not only relay the service The data, and it is also possible to relay and generate the necessary base station control information, including the downlink preamble and the necessary mapping control information.
  • the base station in the downlink direction, the base station first transmits the traffic to be relayed to the relay station, and then the relay transmits them to the wireless communication terminal, both of which are performed in one downlink subframe.
  • the relay station In the upstream direction, the relay station first receives the traffic of the wireless communication terminal and then transmits them to the base station. Similarly, both uplink transmissions are concentrated in the same uplink sub-frame.
  • all service flows can be transmitted to the base station or the wireless communication terminal within one frame time, so that various real-time services can be effectively supported. Since both the base station and the relay station use the same frequency band, the base station must allocate independent resources for the transmission and reception of the relay station. At this time, it can be considered that the relay station is similar to a normal wireless communication device located within the coverage of the base station, and performs data transmission and reception according to the scheduling of the base station.
  • the relay station may have different operations during this time or subcarrier segment. For example, a relay station may send it in QPSK for a while and 64QAM for another period of time.
  • the present invention proposes to use relay station mapping information (RS MAP information) to control the operation of the relay station, including reception and retransmission of uplink and downlink traffic streams.
  • RS MAP information relay station mapping information
  • the relay station mapping information may have the same or similar format as the base station mapping information, but may not include downlink control description (DCD) and uplink control description (UCD) information, and it also includes relay station uplink mapping (RS UL-MAP) information and relay stations.
  • DCD downlink control description
  • UCD uplink control description
  • RS UL-MAP relay station uplink mapping
  • RS DL-MAP Downlink mapping
  • the RS DL-MAP controls the retransmission of the downlink traffic by the relay station
  • the RS UL-MAP controls the reception of the uplink service by the relay station.
  • FIG. 3 schematically shows a transfer process of relay control information according to an embodiment of the present invention. Since all control is concentrated in the base station 101 in the multi-hop relay system, the contents of the relay station mapping information are generated by the base station 101 as a controller and resource allocator and transmitted to the relay station 102. For coverage extended scenarios, the relay station 102 needs to reconstruct or copy the relay station mapping information transmitted by the base station 101, and then transmit it to other wireless communication terminals, such as the mobile station 103, together with other necessary control information, such as a preamble, so as to Its operation is controlled. For the scenario of increased throughput, although the relay station 102 does not need to broadcast specific mapping information to the mobile station 103, the base station 101 must also transmit related control information. To the relay station 102, so that it can know how to perform subsequent reception and retransmission operations.
  • the relay station mapping information can be used as a normal part or a special part of the base station mapping information, and it can be transmitted in a dedicated MAC layer management message.
  • the relay station mapping information has the same format as the base station mapping information and is a complete mapping information, the relay station 102 only needs to broadcast it directly without any processing. This is very advantageous for a trunking relay station in an overlay extended scenario.
  • the relay station mapping information has a different format from the base station mapping information, for example, the relay station mapping information only contains mapping information related to the relay station, the relay station 102 needs to construct its own mapping information for transmission to the mobile station 103, and broadcast it.
  • mapping information For a wireless communication terminal that needs to be controlled, such as mobile station 103.
  • the relay station 102 needs to construct its own mapping information, according to the present invention, the contents of its newly constructed mapping information are also derived from the base station 101. That is to say, the base station 101 still performs centralized control and scheduling of the entire relay system as a whole.
  • a relay method of a wireless access system will be described below with reference to Figs.
  • three mobile stations 103-1, 103-2, 103-3 are exemplarily set to represent wireless communication terminals in a throughput enhanced scenario or in a coverage extended scenario.
  • the relay methods in the two relay scenarios are different from the ones already described above (that is, the processing for receiving the mapping information is different, and correspondingly, the corresponding processing of the mobile station is different. ), basically similar. Therefore, for the sake of brevity, the corresponding difference steps will be explained only when necessary.
  • FIG. 4 is a flow chart showing a relay method of a wireless access system according to an embodiment of the present invention.
  • step S401 the base station 101 transmits control information required by the relay station 102, such as relay station mapping information, and each MAC layer data packet to be relayed through the MAC layer data packet.
  • control information required by the relay station 102 such as relay station mapping information
  • Step S402 is an optional step.
  • step S402 is performed.
  • the relay station 102 constructs or copies the received mapping information (depending on whether the formats of the BS MAP and the RS MAP are consistent) into mapping information to be transmitted by itself, so that the mapping information and the preamble signal are heavy in construction.
  • the sent data stream is placed together into the retransmitted data stream.
  • step S403 the relay station 102 performs the following operations in accordance with the relay station mapping information received from the base station 101: receiving the MAC layer data packet transmitted by the base station 101; and constructing a retransmission data flow.
  • the relay station 102 serves the coverage extended scenario, that is, the step S402 is previously performed, the mapping information and the preamble signal constructed or copied by the relay station 102 need to be added to the constructed retransmission data stream.
  • step S404 the relay station 102 retransmits the MAC layer data packets to be relayed to the mobile stations 103-1, 103-2, 103-3, respectively, in different configurations in accordance with the relay station mapping information received from the base station 101.
  • step S405 the mobile stations 103-1, 103-2, 103-3 receive the data packets relayed by the relay station 102.
  • the mobile stations 103-1, 103-2, 103-3 are in the coverage extended scenario, the mobile stations 103-1, 103-2, 103-3 can only receive the mapping information transmitted by the relay station 102, and thereby The content of the mapping information transmitted by the relay station 102 receives the MAC layer data packet.
  • the mobile stations 103-1, 103-2, 103-3 can only receive mapping information broadcast by the base station 101 (as before) As described above, the relay station 102 does not relay the mapping information), and thereby receives the MAC layer data packet in accordance with the content of the mapping information transmitted by the base station 101.
  • the mobile stations 103-1, 103-2, and 103-3 transmit data packets.
  • the MAC layer data packets are transmitted in accordance with the contents of the mapping information transmitted by the relay station 102.
  • the MAC layer data packets are transmitted in accordance with the contents of the mapping information transmitted by the base station 101.
  • step S407 the relay station 102 receives the MAC layer data packets to be relayed from the mobile stations 103-1, 103-2, and 103-3 in different configurations in accordance with the regulations in the relay station mapping information transmitted by the base station 101.
  • step S408 the relay station 102 restores the data packets transmitted by the respective mobile stations.
  • step S409 the relay station 102 retransmits the MAC layer data packets of the mobile stations 103-1, 103-2, and 103-3 to the base station 101 in accordance with the specifications in the relay station mapping information transmitted from the base station 101.
  • step S410 the base station 101 receives the MAC layer data packets of the mobile stations 10 3 -1, 10 3 - 2 , and 103-3 relayed by the relay station 102.
  • steps S405 and S406 are divided into two possible cases to illustrate the processing of the mobile station, the mobile stations 103-1, 103-2, 103-3 are not aware of it and need not be aware of it. In which situation is it? This is because the entire mapping information relay process, like the relay process of the traffic flow, is transparent to the mobile station.
  • the relay method according to one embodiment of the present invention as depicted in FIG. 4 passes MAC layer data
  • the package-level operation implements one of the most direct methods of relaying.
  • the relay station
  • the relay station 102 directly retransmits all received MAC layer data packets without any modification. This requires the relay station 102 to process each received MAC layer data packet separately, and the relay station 102 mapping information should include the configuration used by the relay station 102 for downlink retransmission, including coding and modulation modes, etc.; all uplink bursts that need to be relayed Receive configuration of data blocks, including coding and modulation methods.
  • the control information in the relay station downlink mapping information (RS DL-MAP) must be specific to the connection level, that is, the corresponding control information is required for each different connection.
  • FIG. 5 is a flow chart showing a relay method of a wireless access system according to another embodiment of the present invention.
  • step S501 the base station 101 transmits control information required by the relay station 102, such as relay station mapping information, through the MAC layer data packet. Thereafter, the base station 101 transmits the MAC layer data packet including the control information in a burst data stream.
  • control information required by the relay station 102 such as relay station mapping information
  • Step S502 is an optional step.
  • step S502 is performed.
  • the relay station 102 constructs or copies the received mapping information (depending on whether the formats of the BS MAP and the RS MAP are consistent) into mapping information to be transmitted by itself, so that the mapping information and the preamble signal are heavy in construction.
  • the sent data stream is placed together into the retransmitted data stream.
  • step S503 the relay station 102 performs the following operations in accordance with the relay station mapping information received from the base station 101: receiving the burst data stream transmitted by the base station 101; and constructing the data stream to be retransmitted.
  • the relay station 102 serves to cover the extended scenario, that is, the step S502 is previously performed, the mapping information and the preamble signal constructed or copied by the relay station 102 need to be added to the constructed retransmission data stream.
  • step S504 the relay station 102 retransmits the burst data streams to be relayed to the mobile stations 103-1, 103-2, 103-3, respectively, in different configurations in accordance with the relay station mapping information received from the base station 101.
  • step S505 the mobile stations 103-1, 103-2, 103-3 receive the burst data stream relayed by the relay station 102.
  • the mobile stations 103-1, 103-2, 103-3 are in the coverage extended scenario, the mobile stations 103-1, 103-2, 103-3 can only receive the mapping information transmitted by the relay station 102, and thereby The content of the mapping information transmitted by the relay station 102 receives the burst data stream.
  • the mobile stations 103-1, 103-2, 103-3 can only receive mapping information broadcast by the base station 101 (as before) Said, At this time, the relay station 102 does not relay the mapping information), and thereby receives the burst data stream in accordance with the content of the mapping information transmitted by the base station 101.
  • the mobile stations 103-1, 103-2, 103-3 transmit the burst data stream.
  • the burst data stream is transmitted in accordance with the contents of the mapping information transmitted by the relay station 102.
  • the burst data stream is transmitted in accordance with the contents of the mapping information transmitted by the base station 101.
  • step S507 the relay station 102 receives the burst data streams to be relayed from the mobile stations 103-1, 103-2, 103-3 in different configurations in accordance with the regulations in the relay station mapping information transmitted by the base station 101.
  • step S508 the relay station 102 restores the burst data stream transmitted by each mobile station.
  • step S509 the relay station 102 retransmits the burst data streams of the mobile stations 103-1, 103-2, and 103-3 to the base station 101 in accordance with the specification of the relay station mapping information transmitted by the base station 101.
  • step S510 the base station 101 receives the burst data stream of the mobile stations 103-1, 103-2, 103-3 relayed by the relay station 102.
  • steps S505 and S506 are divided into two possible cases to illustrate the processing of the mobile station, the mobile stations 103-1, 103-2, 103-3 are not aware of it and need not be aware of it. In which situation is it? This is because the entire mapping information relay process, like the relay process of the traffic flow, is transparent to the mobile station.
  • the relay method according to one embodiment of the present invention as depicted in FIG. 5 retransmits the received bursty data streams.
  • Each of the bursty data streams may include one or more MAC layer data packets.
  • the relay station 102 receives all downlink burst data streams arriving from the base station 101 in the same configuration, the retransmission configuration of each burst data stream may be different. Therefore, the base station 101 must specify relevant control information in the relay station mapping information. All the control information in the downlink mapping information of the relay station only needs to be specific to the level of the burst data stream that needs to be retransmitted, that is, corresponding control information, such as different modulation modes, for each different burst data stream.
  • the base station 101 can transmit each burst service flow to the relay station 102 in the order of each burst service flow appearing in the relay station mapping information.
  • the relay station 102 can retransmit them in the order of configuration without distinguishing the burst data streams.
  • the amount of control information required can be greatly reduced by utilizing the retransmission of the burst data stream level, and as described above, the burst data stream can be directly relayed without modification. simple.
  • the "burst data stream” with a directional arrow is used to identify between the base station and the relay station, and the relay station.
  • the transmission of data is schematically represented between the wireless communication terminal and the wireless communication terminal.
  • the MAC layer data packet is transmitted in the form of a burst data stream between the base station and the relay station, the relay station, and the wireless communication terminal. Therefore, the identification made here only schematically represents the processing level, and is independent of the actual transmission process.
  • FIG. 6 is a flow chart showing a relay method of a wireless access system according to another embodiment of the present invention.
  • the base station 101 transmits control information required by the relay station 102, such as relay station mapping information, through the MAC layer data packet.
  • the single or multiple MAC layer packets destined for the relay station 102 are again encapsulated, where the connection number (CID) used for the encapsulation is the connection number to which the relay station is connected.
  • the base station 101 transmits a data packet that is again encapsulated with the connection number of the relay station.
  • Step S602 is an optional step.
  • step S602 is performed.
  • the relay station 102 constructs or copies the received mapping information (depending on whether the formats of the BS MAP and the RS MAP are consistent) into mapping information to be transmitted by itself, so that the mapping information and the preamble signal are heavy in construction.
  • the sent data stream is placed together into the retransmitted data stream.
  • the relay station 102 performs the following operations according to the relay station mapping information received from the base station 101: receiving the MAC layer data packet transmitted by the base station 101 and identified by the connection number of the relay station 102 itself; decapsulating the MAC layer data packet, Restore the original MAC layer packet; and build the data stream to be retransmitted.
  • the relay station 102 serves to cover the extended scenario, that is, the step S602 is previously performed, the mapping information and the preamble signal constructed or copied by the relay station 102 need to be added to the constructed retransmission data stream.
  • step S604 the relay station 102 retransmits the MAC layer data packets to be relayed to the mobile stations 103-1, 103-2, 103-3, respectively, in different configurations in accordance with the relay station mapping information received from the base station 101.
  • step S605 the mobile stations 103-1, 103-2, and 103-3 receive the data packets relayed by the relay station 102.
  • the mobile stations 103-1, 103-2, 103-3 are in the coverage extended scenario, the mobile stations 103-1, 103-2, 103-3 can only receive the mapping information transmitted by the relay station 102, and thereby The content of the mapping information transmitted by the relay station 102 receives the MAC layer data. Package.
  • the mobile stations 103-1, 103-2, 103-3 can only receive mapping information broadcast by the base station 101 (as before) As described above, the relay station 102 does not relay the mapping information), and thereby receives the MAC layer data packet in accordance with the content of the mapping information transmitted by the base station 101.
  • the mobile stations 103-1, 103-2, and 103-3 transmit the data packets in step S606. Similarly, if the mobile stations 103-1, 103-2, 103-3 are in the coverage extended scenario, the MAC layer data packets are transmitted in accordance with the contents of the mapping information transmitted by the relay station 102. If the mobile stations 103-1, 103-2, 103-3 are in a throughput enhanced scenario, the MAC layer data packets are transmitted in accordance with the contents of the mapping information transmitted by the base station 101.
  • step S607 the relay station 102 receives the MAC layer data packets to be relayed from the mobile stations 103-1, 103-2, and 103-3 in different configurations in accordance with the regulations in the relay station mapping information transmitted by the base station 101.
  • step S608 the relay station 102 restores the MAC layer data packet transmitted by each mobile station, and performs encapsulation again with the connection number of the relay station 102 itself.
  • step S609 the relay station 102 retransmits the re-packaged mobile station MAC layer data packet to the base station 101 in accordance with the specification in the relay station mapping information transmitted by the base station 101.
  • step S610 the base station 101 receives the mobile station MAC layer data packet after the re-encapsulation relayed by the relay station 102, and decapsulates it to recover the original MAC layer data packet of each mobile station.
  • steps S605 and S606 are divided into two possible cases to illustrate the processing of the mobile station, the mobile stations 103-1, 103-2, 103-3 are not aware of it and need not be aware of it. In which situation is it? This is because the entire mapping information relay process, like the relay process of the traffic flow, is transparent to the mobile station.
  • One embodiment in accordance with the present invention as depicted in Figure 6 is based on a modification of the relaying method of Figure 4.
  • the communication transmission between the base station 101 and the relay station 102 is achieved by repackaging the original MAC layer data packet. Since when the base station downlink information transmitted by the base station 101 does not include the connection number (CID) information, the mobile stations 103-1, 103-2, and 103-3 must receive all the MAC layer data packets that can be received, and select and belong to them. Your own business data. Therefore, regardless of the relay scenario, the mobile stations 103-1, 103-2, and 103-3 may receive two identical MAC layer data packets, thereby affecting the processing of the mobile station.
  • the relay method of Figure 6 can solve this problem. According to the method, the control message 'in the downlink mapping information of the relay station must be specific to the connection level, that is, the corresponding control information must be provided for each different connection, for example Such as modulation information.
  • Fig. 7 is a flow chart showing a relay method of a wireless access system according to another embodiment of the present invention.
  • step S701 the base station 101 transmits control information required by the relay station 102, such as relay station mapping information, and MAC layer data packets, through the MAC layer data packet.
  • control information required by the relay station 102 such as relay station mapping information, and MAC layer data packets, through the MAC layer data packet.
  • Step S702 is an optional step.
  • step S702 is performed.
  • the relay station 102 constructs or copies the received mapping information (depending on whether the formats of the BS MAP and the RS MAP are consistent) into mapping information to be transmitted by itself, so that the mapping information and the preamble signal are heavy in construction.
  • the sent data stream is placed together into the retransmitted data stream.
  • the relay station 102 performs the following operations according to the relay station mapping information received from the base station 101: receiving the MAC layer data packet transmitted by the base station 101; updating the connection number of each MAC layer data packet according to the connection number (CID) mapping table; Build the data stream to be resent.
  • the relay station 102 serves to cover the extended scenario, i.e., previously performed step S702
  • the mapping information and the preamble signal constructed or copied by the relay station 102 need to be added to the constructed retransmission data stream.
  • the connection number mapping table is pre-configured, and the connection number of each MAC layer data packet with respect to the base station 101 corresponds to the connection number corresponding to each mobile station 103-1, 103-2, 103-3.
  • step S704 the relay station 102 retransmits the MAC layer data packets to be relayed to the mobile stations 103-1, 103-2, and 103-3, respectively, in different configurations in accordance with the relay station mapping information received from the base station 101.
  • step S705 the mobile stations 103-1, 103-2, 103-3 receive the data packets relayed by the relay station 102.
  • the mobile stations 103-1, 103-2, 103-3 are in the coverage extended scenario, the mobile stations 103-1, 103-2, 103-3 can only receive the mapping information transmitted by the relay station 102, and thereby The content of the mapping information transmitted by the relay station 102 receives the MAC layer data packet.
  • the mobile stations 103-1, 103-2, 103-3 can only receive mapping information broadcast by the base station 101 (as before) As described above, the relay station 102 does not relay the mapping information), and thereby receives the MAC layer data packet in accordance with the content of the mapping information transmitted by the base station 101.
  • step S706 the mobile stations 103-1, 103-2, and 103-3 transmit data packets. Similarly, if the mobile stations 103-1, 103-2, 103-3 are in an overlay extended scenario, Then, the MAC layer data packet is transmitted according to the content of the mapping information transmitted by the relay station 102. If the mobile stations 103-1, 103-2, 103-3 are in a throughput enhanced scenario, the MAC layer data packets are transmitted in accordance with the contents of the mapping information transmitted by the base station 101.
  • step S707 the relay station 102 receives the MAC layer data packets to be relayed from the mobile stations 103-1, 103-2, and 103-3 in different configurations in accordance with the regulations in the relay station mapping information transmitted by the base station 101.
  • step S708 the relay station 102 restores the MAC layer data packet transmitted by each mobile station, and updates the connection number of the MAC layer data packet in accordance with the connection number mapping table.
  • step S709 the relay station 102 retransmits the mobile station MAC layer data packet after updating the connection number to the base station 101 in accordance with the specification in the relay station mapping information transmitted by the base station 101.
  • step S710 the base station 101 receives the MAC layer data packet relayed by the relay station 102.
  • steps S705 and S706 are divided into two possible cases to illustrate the processing of the mobile station, the mobile stations 103-1, 103-2, 103-3 are not aware of it and need not be aware of it. In which situation is it? This is because the entire mapping information relay process, like the relay process of the traffic flow, is transparent to the mobile station.
  • the relay method can overcome the problem that the wireless communication terminal may repeatedly receive the MAC layer data packet by the connection number translation retransmission.
  • this method there are two types of connection numbers, one for the connection between the base station 101 and the relay station 102, and the other for the connection between the relay station 102 and the mobile stations 103-1, 103-2, 103-3. .
  • the relay station 102 can record the correspondence between the two types of connection numbers when the connection is established. Similar to the relay method shown in Fig. 6, in order to effectively perform transmission control, the control information in the downlink mapping of the relay station must be specific to the connection level, that is, corresponding control information, such as modulation information, is required for each different connection.
  • Fig. 8 schematically shows a base station device according to an embodiment of the present invention.
  • Reference numeral 800 denotes a base station device according to an embodiment of the present invention;
  • reference numeral 801 denotes a transmission processing device 801 for processing data to be transmitted;
  • reference numeral 802 denotes a transmitting device 802 for performing downlink data transmission;
  • Reference numeral 803 denotes a receiving device 803 for performing uplink data reception;
  • reference numeral 804 denotes a receiving processing device for processing received data.
  • data to be distributed from its backbone network arrives at base station 800. If the base station 800 determines that communication with a destination wireless communication device such as a mobile station should be performed through the relay station at this time, the related processing is performed.
  • the transmission processing device 801 can be used for control Control information for the operation of the relay station, such as relay station mapping information (RS MAP information), is added to the MAC layer data packet to be transmitted.
  • the transmission processing means 801 may also encapsulate control information for controlling the operation of the relay station as a separate MAC layer data packet for transmission by the transmitting device 802 in a specific MAC layer data channel.
  • the transmission processing device 801 may further re-encapsulate the MAC layer data packet to be transmitted, and the connection number used for re-packaging is the connection number of the relay station. Thereafter, the transmitting device 802 transmits the control information required by the relay station 102 through the MAC layer data packet.
  • the control information may be transmitted as relay station mapping information, or may be transmitted as a separate MAC layer data packet in a specific MAC layer data channel.
  • the I-to-send device 802 transmits downlink data in the form of a MAC layer packet. In accordance with another embodiment of the present invention, transmitting device 802 transmits downlink data in the form of a burst of data.
  • the receiving device 803 receives the uplink data relayed by the relay station.
  • receiving device 803 receives uplink data in the form of MAC layer data packets.
  • the receiving device 803 receives in the form of a burst of data streams.
  • the receiving processing device 804 may decapsulate the re-encapsulated MAC layer data packet sent by the relay station to recover the original MAC layer data packet of each mobile station, depending on whether the transmitting end performs re-encapsulation processing.
  • FIG. 9 schematically illustrates a relay device in accordance with one embodiment of the present invention.
  • Reference numeral 900 denotes a relay device according to an embodiment of the present invention;
  • reference numeral 901 denotes
  • reference numeral 902 denotes a downlink processing apparatus; reference numeral denotes a downlink transmitting apparatus for retransmitting downlink data to the wireless communication terminal; and reference numeral 904 denotes for receiving from the wireless communication Uplink receiving means of uplink data of the terminal; reference numeral 905 denotes an uplink processing apparatus; and reference numeral 906 denotes an uplink transmitting apparatus for retransmitting uplink data to the base station.
  • the downlink receiving apparatus 901 in the relay device 900 receives downlink data (in the form of a MAC layer packet or a burst data stream) from the base station, including controlling the operation of the relay device 900. Control information.
  • the downlink processing device 902 constructs data to be retransmitted (in the form of a MAC layer packet or a burst stream).
  • the downlink processing device 902 constructs or copies the received, for example, mapping information (depending on whether the formats of the BS MAP and the RS MAP are consistent) into mapping information to be transmitted by itself, And the mapping information and the preamble signal are put into the retransmission data stream together with the data stream to be retransmitted.
  • the line processing device 902 is further configured to decapsulate the MAC layer data packet identified by the connection number of the relay device itself, and restore the original MAC layer data packet.
  • the downlink processing apparatus 902 is further configured to update the connection number of each MAC layer data packet according to a pre-configured connection number (CID) mapping table. Thereafter, the downlink transmitting apparatus 903 retransmits downlink data (in the form of a MAC layer packet or a burst stream) for each radio communication terminal in different configurations in accordance with, for example, control information of the mapping information.
  • CID connection number
  • the uplink receiving apparatus 904 receives the uplink data (in the form of a MAC layer packet or a burst stream) of each wireless communication terminal in a different configuration in accordance with the specification of control information such as mapping information.
  • the upstream data processing device 905 restores the uplink data (in the form of a MAC layer packet or a burst data stream) of each wireless communication terminal.
  • the upstream data processing device 905 repackages the upstream data with the connection number of the relay device itself.
  • the upstream data processing device 905 updates the connection number of the MAC layer data packet of each wireless communication terminal in accordance with the connection number mapping table.
  • the uplink transmitting means 906 transmits the uplink data (in the form of a MAC layer packet or a burst data stream) of each wireless communication terminal in a different configuration in accordance with the regulation of the control information such as the mapping information.
  • the base station device and the relay device have been described above according to an embodiment of the present invention. It will be understood by those skilled in the art that, for the sake of brevity, functions and features well known to those skilled in the art, but not within the scope of the present invention (e.g., transmitting and receiving antennas, power control modules, etc.) are omitted in the base station device and the relay device. And such omission does not make the invention unclear.
  • the devices shown in Figures 8 and 9 can be implemented as separate functional modules or as one or a few functional modules.
  • the functional modules can be implemented in a fully hardware implementation, in a fully software-implemented form, or in both hardware and software unit implementations.
  • the processes described in the detailed description may be stored in a readable storage medium of a computing device, and may be any device or medium capable of storing code and/or data for use by a computer system. This includes, but is not limited to, application specific integrated circuits (ASICs) field programmable gate arrays (FPGAs), semiconductor memories, and the like.
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • each of the foregoing processing devices may be implemented by using a device that drives a general-purpose computer, and other processors such as a microcontroller, a field programmable gate array (FPGA) application specific integrated circuit (ASIC), or a combination thereof may be used.
  • Equipment implementation such as a microcontroller, a field programmable gate array (FPGA) application specific integrated circuit (ASIC), or a combination thereof may be used.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit

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Description

无线接入系统的中继方法及其基站、 中继设备和中继系统 技术领域
本发明总体上涉及无线接入系统, 更具体地涉及无线接入系统的业 务中继方法以及使用该方法的基站、 中继设备和中继系统。 背景技术
20世纪 90年代以来, 随着无线接入, 特别是宽带无线接入需求的不 断增加, 宽带无线接入技术得到了快速地发展。 国际电气和电子工程师 协会 (IEEE ) 成立了 IEEE 802.16工作组来专门研究宽带固定无线接入 技术规范, 目标是要建立全球统一的宽带无线接入标准。 为了促进达成 这一目标,几家世界知名企业还发起成立了微波接入全球互通(WiMAX ) 论坛, 力争在全球范围推广这一标准。
WiMAX ( IEEE 802.16 )作为下一代无线宽带接入技术, 具有与有线 高速数据接入技术相匹敌的接入能力。 它通过在基站和用户之间提供视 距 (使用 10-66GHZ频段) 或非视距 (使用 2-l lGHz频段) 的无线连接 来支持各种业务, 其中包括语音和视频等对时延要求很高的实时业务。 由于 WiMAX系统工作在高于 2GHz的较高频段上, 所以它通常需要视 距传输环境。 这就大大限制了 WiMAX 系统的覆盖范围。 这种情况在建 筑物密集的市区环境更加严重, 其复杂的无线传播环境不仅缩小了覆盖 范围, 而且产生了许多盲区。
无线多跳中继 (MMR ) 是 2006年 3月 IEEE新成立了一个工作组。 该工作组的主要目的是定义 IEEE 802.16的多跳扩展,以使 WiMAX系统 支持无线多跳中继。 无线多跳中继的目的是在不影响用户设备的情况下 进一步增加系统的吞吐量或者扩展系统覆盖范围。 它要求所有修改都基 于 IEEE 802.16e, 并且所有修改仅限于基站和中继站, 而不能修改 IEEE 802.16e的用户设备。 由于 IEEE 802.16e只涉及物理层( PHY )和媒体接 入控制层 (MAC ) , 所以所有 改也只在这两层进行。 MMR 工作组的 项目授权要求 (PAR)明确规定了以下三点: ( 1 ) 中继站 (RS )对于用户 端设备来说必须是透明的; (2 ) RS应比基站要小得多; (3 ) 多跳帧结 构必须基于正交频分多址(OFDMA )技术。 现在, 工作组正在进行各项 初期研究工作, 其中包括帧结构的定义、 网络进入流程、 中继站的选择 和切换、 中继站和基站的切换、 控制映射信息 (MAP ) 的传递, 以及中 继站报告用户信息的方法等。 最终的标准将包括增加系统的吞吐量和扩 展系统覆盖范围的技术解决方案。
图 1A和 1B描述了基本的 IEEE802.16中继场景, 图 1A示意性地给 出了吞吐量增强型的场景; 图 1B示意性地给出了覆盖扩展型的场景。 其 中, 相同的标号标识相同或者类似的设备。 为了清楚起见, 各图中仅示 出一个作为示例性无线通信终端的移动台。 可以理解, 在实际情况中可 以存在多个无线通信终端同时处于图 〗A 所示的吞吐量增强型场景或者 图 1B所示的覆盖扩展型场景。 而且, 该无线通信终端并不限于移动台, 还可以为个人数字助理 (PDA ) 、 寻呼机、 笔记本电脑、 便携式设备等 一切具有无线通信功能的终端设备。
在图 1A所示的吞吐量增强型的场景中,作为示例性无线通信终端的 移动台 (MS ) 103位于基站 (BS ) 101 的覆盖范围之内, 其能够直接收 到基站 101广播的信息。 但是, 移动台 103和基站 101之间的业务流还 可以通过中继站 (RS ) 102 进行转发。 现已证明, 通过这种方式对无线 通信终端进行接入, 在一定条件下可以有效地增加系统的吞吐量。
在图 1 B所示的覆盖扩展型的场景中,作为示例性的无线通信设备的 移动台 103位于基站 101的覆盖范围之外, 其无法直接收到基站 101广 播的所有控制信息。 和普通无线通信终端相比, 中继站 102可以具有较 高的发射功率和接收机灵敏度, 能够与基站建立良好的连接。 因此, 处 在基站 101覆盖以外但处在中继站 102覆盖范围之内的移动台 103可以 通过中继站 102完成与基站 101之间的业务传输。
虽然 IEEE 802.16已经描述了无线多跳中继 (MMR ) 系统的两个应 用场景, 但目前只是提出中继站应能够中继上下行的各类业务流。 对于 WiMAX的多跳中继系统, 需要解决的重要问题在于: 如何在基站和无线 设备之间对业务流进行中继, 以及如何对这个中继过程进行控制。 发明内容
本发明的目的是针对现有技术中未解决的技术问题, 为 WiMAX 多 跳中继系统的业务中继及控制提供基本的解决方案。
根据本发明的一方面, 提供一种无线接入系统中的中继方法, 包括 以下步骤: 在下行方向, 接收来自基站的下行数据, 其中该下行数据包 括对于中继操作的控制信息; 构建要重发的下行数据; 按照所述控制信 息规定的配置向各无线通信终端重发所述构建的下行数据; 以及在上行 方向, 按照所述控制信息规定的配置接收来自所述各无线通信终端的上 行数据; 恢复所述各无线通信终端的上行数据; 按所述控制信息规定的 配置向所述基站重发上行数据。
根据本发明的另一方面, 提供一种基站设备, 包括: 发送装置, 用 于向中继站发送下行数据; 发送处理装置, 用于将控制中继操作的控制 信息添加到待发送的下行数据; 接收装置, 用于接收所述中继站重发的 上行数据。
根据本发明的另一方面, 提供一种中继设备, 包括: 下行接收装置, 用于接收来自基站的下行数据, 其中该下行数据包括对于中继操作的控 制信息; 下行处理装置, 用于构建要重发的下行数据; 下行发送装置, 用于按照所述控制信息规定的配置向各无线通信终端重发所述构建的下 行数据; 上行接收装置, 用于按照所述控制信息规定的配置接收来自所 述各无线通信终端的上行数据; 上行处理装置, 用于恢复所述各无线通 信终端的上行数据; 上行发送装置, 用于按所述控制信息规定的配置向 所述基站重发上行数据。
根据本发明的另一方面, 提供一种无线中继系统, 包括根据本发明 的基站设备和根据本发明的中继设备。
本发明为现有的 IEEE 802.16无线多跳中继 (MMR ) 系统提供了中 继过程的解决方案。 通过本发明, 基站能够对整个无线多跳中继系统进 行集中控制, 有效地简化了中继设备的复杂度, 并且能够实现对于无线 通信终端的透明传输。 而且, 根据本发明的实施例, 中继设备只需在覆 盖扩展型场景下发送的复制或者构建映射信息来控制无线通信终端的通 信操作, 简单有效地解决了当无线通信终端处于基站覆盖区域之外的控 制信息传递问题。
结合附图阅读本发明实施方式的详细描述后, 本发明的其它特点和 优点将变得更加清楚。 附图说明
图 1A和 1B描述了基本的 IEEE802.16中继场景, 其中图 1A示意性 地示出了吞吐量增强型的场景, 图 1B 示意性地示出了覆盖扩展型的场 景;
图 2示出了中继系统中业务中继处理基本顺序的示例;
图 3示意性地示出了根据本发明实施例的中继控制信息的传送过程; 图 4示出了根据本发明一个实施例的无线接入系统的中继方法的流 程图;
图 5 示出了根据本发明另一实施例的无线接入系统的中继方法的流 程图;
图 6 示出了根据本发明另一实施例的无线接入系统的中继方法的流 程图;
图 7 示出了根据本发明另一实施例的无线接入系统的中继方法的流 程图;
图 8示意性地示出了根据本发明一个实施例的基站设备;
图 9示意性地示出了根据本发明一个实施例的中继设备。 具体实施方式
现在, 参考附图描述本发明, 其中贯穿全文地以相同的参考标号表 示相同或者类似的装置。
图 1A和 1B描述了基本的 IEEE802.16中继场景,并且已经在背景技 术中进行了描述。
根据本发明, 在 IEEE802.16的中继场景, 即如图 1A所示吞吐量增 强型场景和 /或如图 1B 所示覆盖扩展型场景中, 所有控制和调度功能可 以均由基站执行。 由基站负责为中继站和作为用户的无线通信终端 (例 如各个移动台) 的上下行业务分配带宽资源, 并且协调中继站和各个移 动台之间进行的通信。 这种集中式的控制方法可以大大减小中继站的复 杂度, 降低其成本。 由于基站和中继站之间具备视距传输信道, 因此中 继站和基站之间通信连接质量能够得到保证。
在吞吐量增强型场景中, 无线通信终端位于基站的覆盖范围内, 其 能直接收到基站广播的所有控制信息。 因此优选地, 中继站可以只转发 (中继) 基站和无线通信终端之间的业务流来增加系统的吞吐量。 这样 可以使得在该场景下的中继站复杂度大大降低。
在覆盖扩展型场景中, 无线通信终端位于基站的覆盖范围以外, 其 无法接收到基站广播的所有控制信息。 因此中继站必须不仅能中继业务 数据, 而且还要可以中继和生成必要的基站控制信息, 其中包括下行前 导信号和必要的映射控制信息。
为了更好地理解本发明的技术方案, 首先参照图 2说明中继系统中 业务中继处理的基本顺序。
如图 2所示, 在下行方向, 基站首先把需要中继的业务流发送给中 继站, 然后中继站再把它们发送给无线通信终端, 这两次发送都在一个 下行子帧内进行。 在上行方向, 中继站首先接收无线通信终端的业务流, 然后再把它们发送给基站。 同样, 两次上行传输都集中在同一个上行子 帧内进行。 通过这种调度方式, 所有业务流都可以在一帧的时间内传送 到基站或无线通信终端, 所以可以有效的支持各种实时业务。 由于基站 和中继站都使用同一频段, 基站必须为中继站的发送和接收分配独立的 资源。 此时, 可以认为中继站类似于一个位于基站覆盖范围之内的普通 无线通信设备, 按照基站的调度进行数据收发。
虽然中继站的下行发送和上行接收的时间段或子载波段可以由基站 明确地在下行广播的映射信息中规定, 但在这个时间或子载波段内中继 站可能会有不同的操作。 比如, 中继站可能在其中一段时间以 QPSK发 送, 而另一段时间以 64QAM发送。 为了易于对中继站的操作进行全面 的控制, 本发明提出使用中继站映射信息 (RS MAP信息) 来控制中继 站的操作, 包括上下行业务流的接收和重发。 中继站映射信息可以和基 站映射信息具有相同或类似的格式, 但可能不包括下行控制描述(DCD ) 和上行控制描述 (UCD ) 信息, 而且它也包括中继站上行映射 (RS UL-MAP ) 信息和中继站下行映射 (RS DL-MAP ) 信息两部分。 其中, RS DL-MAP控制中继站对下行业务流的重发, 而 RS UL-MAP控制中继 站对上行业务的接收。
图 3示意性地示出了根据本发明实施例的中继控制信息的传送过程。 由于在多跳中继系统中, 所有控制集中在基站 101, 所以中继站映射 信息的内容是由作为控制器和资源分配器的基站 101 产生并传送给中继 站 102的。 对于覆盖扩展型场景, 中继站 102需要将基站 101发送的中 继站映射信息进行重新构建或者复制, 然后将其与其他必要控制信息, 例如前导信号一起发送给各个无线通信终端, 例如移动台 103 , 以便对 其操作进行控制。 对于吞吐量增加的场景, 虽然中继站 102不需要向移 动台 103广播特定映射信息, 但基站 101也必须将相关的控制信息传送 到中继站 102, 以便其能够知晓如何进行之后的接收和重传操作。
控制信息具体传送方式可以有很多种。 既可以将它作为基站映射信 息的一个普通部分或特殊部分,又可以把它放在专门的 MAC层管理消息 中传送。 特别地, 在覆盖扩展场景下, 如果中继站映射信息具有和基站 映射信息相同的格式, 并且是一个完整的映射信息, 则中继站 102只需 要直接将它广播出去, 而不需要做任何处理。 这对于在覆盖扩展场景下 筒化中继站十分有利。 当然, 如果中继站映射信息与基站映射信息具有 不同的格式, 例如, 中继站映射信息只包含与中继站相关的映射信息, 则中继站 102需要构建自身用于发送到移动台 103的映射信息, 并将它 广播给需要进行控制的无线通信终端, 例如移动台 103。 但是, 即便是 中继站 102需要构建自身的映射信息, 根据本发明, 其新构建的映射信 息中的内容也来自于基站 101。 也就是说, 总体上仍旧是由基站 101 对 整个中继系统进行集中式的控制和调度。
以下根据图 4至图 7说明根据本发明的无线接入系统的中继方法。 在这些实施例中, 示例性的设置了三个移动台 103-1、 103-2、 103-3代表 处于吞吐量增强型场景中或者处于覆盖扩展型场景中的无线通信终端。 本领域的技术人员可以理解, 这两种中继场景中的中继方法除了在前文 已经描述过的区别之外 (也即对接收到映射信息的处理不同, 以及相应 地移动台的相应处理不同) , 基本是类似的。 因此, 为了简洁起见, 仅 在必要时对相应的区别步骤加以说明。
图 4 示出了根据本发明一个实施例的无线接入系统的中继方法的流 程图。
如图 4所示, 在下行方向上, 在步骤 S401 中, 基站 101通过 MAC 层数据包发送中继站 102所需的控制信息, 例如中继站映射信息, 以及 需要中继的各个 MAC层数据包。
步骤 S402为一个可选步骤。当中继站 102服务于覆盖扩展型场景时, 则执行步驟 S402。 在步驟 S402中, 中继站 102把接收到的映射信息构 建或者复制 (取决于 BS MAP和 RS MAP的格式是否一致) 成其自身要 发送的映射信息, 以便将该映射信息和前导信号在构建要重发的数据流 时一起放入到重发数据流中。
在步骤 S403中, 中继站 102按照从基站 101收到的中继站映射信息 进行以下操作: 接收基站 101发送的 MAC层数据包; 以及构建要重发的 数据流。 此时, 如果中继站 102服务于覆盖扩展型场景, 也即之前执行 了步骤 S402, 则需要将中继站 102构建或者复制的映射信息和前导信号 加入到该构建的重发数据流中。
在步驟 S404中, 中继站 102按照从基站 101收到的中继站映射信息 以不同的配置重发要分别中继给移动台 103-1、 103-2、 103-3的 MAC层 数据包。
在步骤 S405中, 移动台 103-1、 103-2、 103-3接收由中继站 102所 中继的数据包。 其中如果移动台 103-1、 103-2、 103-3处于覆盖扩展型场 景, 则移动台 103-1、 103-2、 103-3只能接收到中继站 102发送的映射信 息,并且由此按照该中继站 102发送的映射信息的内容接收 MAC层数据 包。 如果该移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则移动 台 103-1、 103-2、 103-3只能收到基站 101广播的映射信息 (如前所述, 此时中继站 102不中继映射信息) , 并且由此按照该基站 101发送的映 射信息的内容接收 MAC层数据包。
在上行方向上, 在步骤 S406中, 移动台 103-1、 103-2、 103-3发送 数据包。 类似地, 如果移动台 103-1、 103-2、 103-3处于覆盖扩展型场景, 则按照该中继站 102发送的映射信息的内容发送 MAC层数据包。如果该 移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则按照该基站 101 发送的映射信息的内容发送 MAC层数据包。
在步骤 S407中, 中继站 102按照基站 101发送的中继站映射信息中 的规定, 以不同的配置接收来自移动台 103-1、 103-2、 103-3的需要中继 的 MAC层数据包。
在步骤 S408中, 中继站 102恢复各个移动台发送的数据包。
在步骤 S409中, 中继站 102按照基站 101发送的中继站映射信息中 的规定向基站 101重发移动台 103-1、 103-2、 103-3的各 MAC层数据包。
在步驟 S410中,基站 101接收中继站 102中继的移动台 103-1、103-2、 103-3的 MAC层数据包。
本领域技术人员可以理解, 虽然步骤 S405和 S406分为两种可能的 情况说明了移动台的处理, 但是移动台 103-1、 103-2、 103-3并不能意识 到, 也无需意识到其究竟处于哪一种情况之中。 这是因为整个映射信息 中继过程, 与业务流的中继过程一样, 对于移动台来说是透明的。
如图 4所描绘的根据本发明一个实施例的中继方法通过 MAC层数据 包级别的操作实现了一种最为直接的中继方法。 在该实施例中, 中继站
102将收到的所有 MAC层数据包直接重发, 不对其进行任何修改。 这就 要求中继站 102对每个收到的 MAC层数据包进行单独处理,并且中继站 102映射信息应该包括中继站 102下行重发所用的配置, 包括编码和调 制方式等; 所有需要中继的上行突发数据块的接收配置, 包括编码和调 制方式等。 为了支持数据包级别的重传, 中继站下行映射信息 (RS DL-MAP ) 内的控制信息必须具体到连接的级别, 即对各个不同的连接 都要有相应的控制信息。
图 5 示出了根据本发明另一个实施例的无线接入系统的中继方法的 流程图。
如图 5所示, 在下行方向上, 在步骤 S501 中, 基站 101通过 MAC 层数据包发送中继站 102所需的控制信息, 例如中继站映射信息。 之后, 基站 101 以突发数据流发送该包括控制信息的 MAC层数据包。
步骤 S502为一个可选步骤。当中继站 102服务于覆盖扩展型场景时, 则执行步骤 S502。 在步骤 S502中, 中继站 102把接收到的映射信息构 建或者复制 (取决于 BS MAP和 RS MAP的格式是否一致) 成其自身要 发送的映射信息, 以便将该映射信息和前导信号在构建要重发的数据流 时一起放入到重发数据流中。
在步骤 S503中, 中继站 102按照从基站 101收到的中继站映射信息 进行以下操作: 接收基站 101发送的突发数据流; 以及构建要重发的数 据流。 此时, 如果中继站 102服务于覆盖扩展型场景, 也即之前执行了 步驟 S502 , 则需要将中继站 102构建或者复制的映射信息和前导信号加 入到该构建的重发数据流中。
在步骤 S504中, 中继站 102按照从基站 101收到的中继站映射信息 以不同的配置重发要分别中继给移动台 103-1、 103-2、 103-3的突发数据 流。
在步骤 S505中, 移动台 103-1、 103-2、 103-3接收由中继站 102所 中继的突发数据流。 其中如果移动台 103-1、 103-2、 103-3处于覆盖扩展 型场景, 则移动台 103-1、 103-2、 103-3只能接收到中继站 102发送的映 射信息, 并且由此按照该中继站 102发送的映射信息的内容接收突发数 据流。 如果该移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则移 动台 103-1、 103-2、 103-3只能收到基站 101广播的映射信息(如前所述, 此时中继站 102不中继映射信息) , 并且由此按照该基站 101发送的映 射信息的内容接收突发数据流。
在上行方向上, 在步骤 S506中, 移动台 103-1、 103-2、 103-3发送 突发数据流。 类似地, 如果移动台 103-1、 103-2、 103-3处于覆盖扩展型 场景, 则按照该中继站 102发送的映射信息的内容发送突发数据流。 如 果该移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则按照该基站 101发送的映射信息的内容发送突发数据流。
在步驟 S507中, 中继站 102按照基站 101发送的中继站映射信息中 的规定, 以不同的配置接收来自移动台 103-1、 103-2, 103-3的需要中继 的突发数据流。
在步骤 S508中, 中继站 102恢复各个移动台发送的突发数据流。 在步骤 S509中, 中继站 102按照基站 101发送的中继站映射信息中 '的规定向基站 101重发移动台 103-1、 103-2、 103-3的突发数据流。
在步骤 S510中,基站 101接收中继站 102中继的移动台 103-1、103-2、 103-3的突发数据流。
本领域技术人员可以理解, 虽然步骤 S505和 S506分为两种可能的 情况说明了移动台的处理, 但是移动台 103-1、 103-2、 103-3并不能意识 到, 也无需意识到其究竟处于哪一种情况之中。 这是因为整个映射信息 中继过程, 与业务流的中继过程一样, 对于移动台来说是透明的。
如图 5 所描绘的根据本发明一个实施例的中继方法对收到的各个突 发数据流进行重传。其中每个突发数据流可以包括一个或多个 MAC层数 据包。 该方法中, 虽然中继站 102是用同一配置接收所有从基站 101到 达的下行突发数据流, 但各突发数据流的重发配置可能不同。 所以基站 101 必须在中继站映射信息中规定相关的控制信息。 所有, 在中继站下 行映射信息内的控制信息只需要具体到各需要重传的突发数据流的级 别, 即对各个不同的突发数据流要有相应的控制信息, 例如不同的调制 方式等。 优选地, 基站 101 可以按照中继站映射信息中出现的各突发业 务流的顺序将各突发业务流发送给中继站 102。 这样, 中继站 102在接 收到这些突发数据流之后, 就可以按照配置顺序地将其进行重发, 而不 需要对各突发数据流进行区分。 根据本发明该实施例的中继方法, 通过 利用突发数据流级别的重传可以大大减少所需的控制信息量, 而且如上 说述, 突发数据流可以不经过修改直接进行中继, 处理简单。 此外, 需要说明的是, 为了与图 4所示的基于 MAC层数据包的透传 相区别, 在图 5 中用带有方向箭头的 "突发数据流" 标识在基站和中继 站之间、 中继站和无线通信终端之间示意性地表示数据的传输。 但是, 本领域的技术人员可以理解, 在实际传输时, 基站和中继站、 中继站和 无线通信终端之间都要将 MAC层数据包以突发数据流的形式进行传送。 因此, 这里所作的标识仅示意性地表示处理层面, 而与实际传输过程无 关。
图 6 示出了根据本发明另一实施例的无线接入系统的中继方法的流 程图。
如图 6所示, 在下行方向上, 在步骤 S601 中, 基站 101通过 MAC 层数据包发送中继站 102所需的控制信息, 例如中继站映射信息。 将发 往中继站 102的单个或多个 MAC层数据包再次进行封装,其中封装所用 的连接号(CID )是与中继站进行连接的连接号。 之后, 基站 101发送以 中继站的连接号再次封装的数据包。
步骤 S602为一个可选步骤。当中继站 102服务于覆盖扩展型场景时, 则执行步骤 S602。 在步骤 S602中, 中继站 102把接收到的映射信息构 建或者复制 (取决于 BS MAP和 RS MAP的格式是否一致) 成其自身要 发送的映射信息, 以便将该映射信息和前导信号在构建要重发的数据流 时一起放入到重发数据流中。
在步骤 S603中, 中继站 102按照从基站 101收到的中继站映射信息 进行以下操作: 接收基站 101发送的由中继站 102本身连接号所标识的 MAC层数据包; 对该 MAC层数据包进行解封装, 恢复原 MAC层数据 包; 以及构建要重发的数据流。 此时, 如果中继站 102服务于覆盖扩展 型场景, 也即之前执行了步骤 S602, 则需要将中继站 102构建或者复制 的映射信息和前导信号加入到该构建的重发数据流中。
在步骤 S604中, 中继站 102按照从基站 101收到的中继站映射信息 以不同的配置重发要分别中继给移动台 103-1、 103-2、 103-3的 MAC层 数据包。
在步骤 S605中, 移动台 103-1、 103-2、 103-3接收由中继站 102所 中继的数据包。 其中如果移动台 103-1、 103-2、 103-3处于覆盖扩展型场 景, 则移动台 103-1、 103-2、 103-3只能接收到中继站 102发送的映射信 息,并且由此按照该中继站 102发送的映射信息的内容接收 MAC层数据 包。 如果该移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则移动 台 103-1、 103-2、 103-3只能收到基站 101广播的映射信息 (如前所述, 此时中继站 102不中继映射信息) , 并且由此按照该基站 101发送的映 射信息的内容接收 MAC层数据包。
在上行方向上, 在步骤 S606中, 移动台 103-1、 103-2、 103-3发送 数据包。 类似地, 如果移动台 103-1、 103-2、 103-3处于覆盖扩展型场景, 则按照该中继站 102发送的映射信息的内容发送 MAC层数据包。如果该 移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则按照该基站 101 发送的映射信息的内容发送 MAC层数据包。
在步驟 S607中, 中继站 102按照基站 101发送的中继站映射信息中 的规定, 以不同的配置接收来自移动台 103-1、 103-2、 103-3的需要中继 的 MAC层数据包。
在步骤 S608中,中继站 102恢复各个移动台发送的 MAC层数据包, 并且以中继站 102 自身的连接号再次进行封装。
在步驟 S609中, 中继站 102按照基站 101发送的中继站映射信息中 的规定向基站 101重发再次封装之后的移动台 MAC层数据包。
在步骤 S610中, 基站 101接收中继站 102中继的再次封装之后的移 动台 MAC层数据包, 并且对其进行解封装恢复各移动台的原 MAC层数 据包。
本领域技术人员可以理解, 虽然步骤 S605和 S606分为两种可能的 情况说明了移动台的处理, 但是移动台 103-1、 103-2、 103-3并不能意识 到, 也无需意识到其究竟处于哪一种情况之中。 这是因为整个映射信息 中继过程, 与业务流的中继过程一样, 对于移动台来说是透明的。
如图 6所描绘的根据本发明一个实施例是基于图 4的中继方法的一 种改进。基站 101和中继站 102之间的通信传输是通过对原 MAC层数据 包进行再封装来实现的。 由于当基站 101发送的基站下行映射信息中不 包含连接号 (CID ) 信息时, 移动台 103-1、 103-2、 103-3必须接收所有 可以收到的 MAC层数据包, 并从中选择属于自己的业务数据。 所以, 无 论处于哪一种中继情景, 移动台 103-1、 103-2、 103-3都可能会收到两个 同样的 MAC层数据包,从而对移动台的处理产生影响。 图 6的中继方法 能够解决这种问题。 依据该方法的中继站下行映射信息内的控制信 ' 必 须具体到连接的级别, 即对各个不同的连接都要有相应的控制信息, 例 如调制信息。
图 7 示出了根椐本发明另一实施例的无线接入系统的中继方法的流 程图。
如图 7所示, 在下行方向上, 在步骤 S701 中, 基站 101通过 MAC 层数据包发送中继站 102所需的控制信息, 例如中继站映射信息, 以及 MAC层数据包。
步骤 S702为一个可选步骤。当中继站 102服务于覆盖扩展型场景时, 则执行步骤 S702。 在步骤 S702中, 中继站 102把接收到的映射信息构 建或者复制 (取决于 BS MAP和 RS MAP的格式是否一致) 成其自身要 发送的映射信息, 以便将该映射信息和前导信号在构建要重发的数据流 时一起放入到重发数据流中。
在步骤 S703中, 中继站 102按照从基站 101收到的中继站映射信息 进行以下操作: 接收基站 101发送的 MAC层数据包; 按连接号 (CID ) 映射表更新各个 MAC层数据包的连接号; 以及构建要重发的数据流。此 时,如果中继站 102服务于覆盖扩展型场景,也即之前执行了步骤 S702 , 则需要将中继站 102构建或者复制的映射信息和前导信号加入到该构建 的重发数据流中。其中所述连接号映射表是预先配置的, 各 MAC层数据 包的相对于基站 101的连接号与对应于各移动台 103-1、 103-2、 103-3的 连接号——对应。
在步骤 S704中, 中继站 102按照从基站 101收到的中继站映射信息 以不同的配置重发要分别中继给移动台 103-1、 103-2、 103-3的 MAC层 数据包。
在步骤 S705中, 移动台 103-1、 103-2、 103-3接收由中继站 102所 中继的数据包。 其中如果移动台 103-1、 103-2、 103-3处于覆盖扩展型场 景, 则移动台 103- 1、 103-2、 103-3只能接收到中继站 102发送的映射信 息,并且由此按照该中继站 102发送的映射信息的内容接收 MAC层数据 包。 如果该移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则移动 台 103-1、 103-2、 103-3只能收到基站 101广播的映射信息 (如前所述, 此时中继站 102不中继映射信息) , 并且由此按照该基站 101发送的映 射信息的内容接收 MAC层数据包。
在上行方向上, 在步骤 S706中, 移动台 103-1、 103-2、 103-3发送 数据包。 类似地, 如果移动台 103-1、 103-2、 103-3处于覆盖扩展型场景, 则按照该中继站 102发送的映射信息的内容发送 MAC层数据包。如果该 移动台 103-1、 103-2、 103-3处于吞吐量增强型场景, 则按照该基站 101 发送的映射信息的内容发送 MAC层数据包。
在步骤 S707中, 中继站 102按照基站 101发送的中继站映射信息中 的规定, 以不同的配置接收来自移动台 103-1、 103-2、 103-3的需要中继 的 MAC层数据包。
在步骤 S708中,中继站 102恢复各个移动台发送的 MAC层数据包, 并且按照连接号映射表更新 MAC层数据包的连接号。
在步骤 S709中, 中继站 102按照基站 101发送的中继站映射信息中 的规定向基站 101重发更新连接号后的移动台 MAC层数据包。
在步骤 S710中, 基站 101接收中继站 102中继的 MAC层数据包。 本领域技术人员可以理解, 虽然步骤 S705和 S706分为两种可能的 情况说明了移动台的处理, 但是移动台 103-1、 103-2、 103-3并不能意识 到, 也无需意识到其究竟处于哪一种情况之中。 这是因为整个映射信息 中继过程, 与业务流的中继过程一样, 对于移动台来说是透明的。
如图 7所描绘的根据本发明一个实施例是基于图 4的中继方法的另 一种改进。 该中继方法通过连接号翻译重传能够克服无线通信终端可能 重复接收 MAC层数据包的问题。 在该方法中, 存在两类连接号, 一类用 于基站 101和中继站 102之间的连接, 另一类用于中继站 102和移动台 103-1、 103-2、 103-3之间的连接。 中继站 102可以在连接建立时记录这 两类连接号的对应关系。 与图 6所示的中继方法相类似, 为了有效进行 发送控制, 中继站下行映射内的控制信息必须具体到连接的级别, 即对 各个不同的连接都要有相应的控制信息, 例如调制信息。
图 8 示意性地示出了根据本发明一个实施例的基站设备。 其中, 参 考标号 800表示根据本发明一个实施例的基站设备; 参考标号 801表示 用于对将发送的数据进行处理的发送处理装置 801 ;参考标号 802表示用 于进行下行数据发送的发送装置 802;参考标号 803表示用于进行上行数 据接收的接收装置 803;参考标号 804表示用于对所接收的数据进行处理 的接收处理装置。
如图 8所示, 来自其诸如骨干网的待分发的数据到达基站 800。 如果 基站 800判断此时应通过中继站与诸如移动台的目的地无线通信设备进 行通信, 则执行相关处理。 在发送端, 发送处理装置 801 可以将用于控 制中继站的操作的控制信息, 例如中继站映射信息 (RS MAP信息) 添 加到待发送的 MAC层数据包中。发送处理装置 801也可以将用于控制中 继站的操作的控制信息封装为单独的 MAC 层数据包, 以便由发送装置 802以特定的 MAC层数据通道进行发送。 根据本发明的一种实施例, 发 送处理装置 801还可以对待发送的 MAC层数据包进行再封装,进行再封 装所用的连接号是中继站的连接号。之后,发送装置 802通过 MAC层数 据包发送中继站 102所需的控制信息。 取决于发送处理装置 801 , 该控 制信息可以作为中继站映射信息进行发送,也可以作为单独的 MAC层数 据包以特定的 MAC层数据通道进行发送。根据本发明的一种实施例,发
I 送装置 802以 MAC层数据包的形式发送下行数据。根据本发明的另一种 实施例, 发送装置 802以突发数据流的形式发送下行数据。
在接收端, 接收装置 803接收中继站中继的上行数据。 根据本发明 的一种实施例,接收装置 803是以 MAC层数据包的形式接收上行数据的。 根据本发明的另一种实施例, 接收装置 803是以突发数据流的形式接收
; 上行数据的。 可选地, 取决于发送端是否进行再封装处理, 接收处理装 置 804可以对中继站发送的经过再封装的 MAC层数据包进行解封装,以 恢复各移动台的原 MAC层数据包。
图 9 示意性地示出了根据本发明一个实施例的中继设备。 其中, 参 考标号 900表示根据本发明一个实施例的中继设备; 参考标号 901表示
) 用于接收基站发送的下行数据的下行接收装置; 参考标号 902表示下行 处理装置; 参考标号表示用于向无线通信终端重发下行数据的下行发送 装置; 参考标号 904表示用于接收来自无线通信终端的上行数据的上行 接收装置; 参考标号 905表示上行处理装置; 参考标号 906表示用于向 基站重发上行数据的上行发送装置。
如图 9所示, 在下行方向, 中继设备 900中的下行接收装置 901接 收来自基站的下行数据 (以 MAC层数据包形式或者突发数据流形式) , 其中包括控制中继设备 900的操作的控制信息。 下行处理装置 902构建 要重发的数据(以 MAC层数据包形式或者突发数据流形式)。 当且仅当 中继设备服务于覆盖扩展型场景时, 下行处理装置 902把接收到的例如 映射信息构建或者复制 (取决于 BS MAP和 RS MAP的格式是否一致) 成其自身要发送的映射信息, 并且将该映射信息和前导信号在构建要重 发的数据流时一起放入到重发数据流中。 根据本发明的一种实施例, 下 行处理装置 902还用于对由中继设备本身连接号所标识的 MAC层数据包 进行解封装, 恢复原 MAC层数据包。 根据本发明一种实施例, 下行处理 装置 902还用于按预先配置的连接号(CID )映射表更新各个 MAC层数 据包的连接号。 之后, 下行发送装置 903按照例如映射信息的控制信息, 以不同的配置重发对于各无线通信终端下行数据(以 MAC层数据包形式 或者突发数据流形式) 。
在上行方向, 上行接收装置 904按照诸如映射信息的控制信息的规 定, 以不同的配置接收各无线通信终端的上行数据(以 MAC层数据包形 式或者突发数据流形式) 。 上行数据处理装置 905 恢复各无线通信终端 的上行数据(以 MAC层数据包形式或者突发数据流形式)。 根据本发明 的一种实施例, 上行数据处理装置 905 以中继设备自身的连接号对上行 数据进行再封装。 根据本发明的另一种实施例, 上行数据处理装置 905 按照连接号映射表更新各无线通信终端的 MAC 层数据包的连接号。 之 后, 上行发送装置 906按照诸如映射信息的控制信息的规定, 以不同的 配置发送各无线通信终端的上行数据(以 MAC层数据包形式或者突发数 据流形式) 。
以上根据本发明的实施例, 对基站设备和中继设备做出了描述。 本 领域的技术人员可以理解, 为了简便起见, 省略了基站设备和中继设备 中本领域技术人员公知的、 但不属于本发明范围的功能和特征 (例如, 发射接收天线、 功率控制模块等) , 并且这种省略不会使得本发明变得 不清楚。
在图 8和图 9中示出的装置可以实现为单独的功能模块, 也可合并 为一个或少数几个功能模块。 其中, 功能模块能够采用完全硬件化的实 现形式、 完全软件化的实现形式或者同时包含硬件和软件单元的实现形 式。 根据一种实现方式, 详细描述中所述的处理过程可以存储于计算设 备的可读存储介质中, 可以是能够存储代码和 /或数据以由计算机系统能 够使用的任何设备或介质。 这包括, 但不限于, 专用集成电路 (ASIC ) 现场可编程门阵列 (FPGA ) 、 半导体存储器等。 根据一种实现方式, 上 述各处理装置可以利用驱动通用计算机的装置实现, 也可以使用诸如微 控制器、 现场可编程门阵列 (FPGA)专用集成电路 (ASIC)或其组合之类 的其它处理器设备实现。
虽然结合附图描述了本发明的实施方式, 但是本领域技术人员可以 在所附权利要求的范围内做出各种变形或修改

Claims

权 利 要 求
1. 一种无线接入系统中的中继方法, 包括以下步骤:
在下行方向,
接收来自基站的下行数据, 其中该下行数据包括对于中继操作 的控制信息;
构建要重发的下行数据;
按照所述控制信息规定的配置向各无线通信终端重发所述构建 的下行数据, 以及
在上行方向,
按照所述控制信息规定的配置接收来自所述各无线通信终端的上行 数据;
恢复所述各无线通信终端的上行数据;
按所述控制信息规定的配置向所述基站重发上行数据。
2. 根据权利要求 1所述的方法, 其中所述下行数据是指 MAC层数 据包; 并且上行数据是指 MAC层数据包。
3. 根据权利要求 1所述的方法,其中所述下行数据是指突发数据流; 并且上行数据是指突发数据流。
4. 根据权利要求 2所述方法, 其中所述来自基站的下行 MAC层数 据包是以中继站的连接号所标识的 MAC层数据包, 并且
该方法还包括以下步骤:
在下行方向,对所述以中继站的连接号所标识的 MAC层数据包进行 解封装;
在上行方向,对所述恢复的上行 MAC层数据包以所述中继站的连接 号再次进行封装。
5. 根据权利要求 4所述方法, 还包括以下步骤:
在上行方向, 所述基站对接收的以所述中继站的连接号标识的上行 MAC层数据包进行解封装, 以恢复原上行 MAC层数据包。
6. 根据权利要求 2所述方法, 还包括以下步骤:
在下行方向,按照连接号映射表将各个下行 MAC层数据包的连接号 更新为对应于所述各无线通信终端的连接号;
在上行方向,按照所述连接号映射表将各个上行 MAC层数据包的连 接号恢复为各自相对于基站的连接号,
其中, 所述连接号映射表是预先配置的, 并且其中各 MAC层数据包 的相对于基站的连接号与对应于各无线通信终端的连接号——对应。
7. 根据前述任一权利要求所述的方法, 其中所述对于中继操作的控 制信息是中继站映射信息。
8. 根据权利要求 7所述的方法, 其中还包括以下步骤:
当所述中继站服务于覆盖扩展型场景时, 将所述接收到的中继站映 射信息构建或者复制成将发送给无线通信终端的映射信息,
并且其中所述构建的下行数据包括所述将发送给无线通信终端的映 射信息和前导信号。
9. 根据权利要求 7所述的方法, 其中所述中继站映射信息包括用于 控制中继站对下行数据的重发的中继站下行映射信息, 以及用于控制中 继站对上行数据的接收的中继站上行映射信息。
10. 一种基站设备, 包括:
发送装置, 用于向中继站发送下行数据;
发送处理装置, 用于将控制中继操作的控制信息添加到待发送的下 行数据;
接收装置, 用于接收所述中继站重发的上行数据。
11. 根据权利要求 10所述的基站设备,其中所述下行数据是指 MAC 层数据包; 并且上行数据是指 MAC层数据包。
12. 根据权利要求 10所述的基站设备, 其中所述下行数据是指突发 数据流; 并且上行数据是指突发数据流。
13. 根据权利要求 11所述的基站设备, 其中所述发送处理装置还用 于对所述待发送的下行 MAC层数据包进行再封装,进行再封装所用的连 接号是所述中继站的连接号,
并且所述基站设备还包括:
接收处理装置, 用于对所述接收装置接收的、 以中继站所用的连接 号标识的上行 MAC层数据包进行解封装。
14. 根据权利要求 10-13中的任何一项所述的基站设备,其中所述对 于中继操作的控制信息是中继站映射信息, 其中包括用于控制中继站对 下行数据的重发的中继站下行映射信息, 以及用于控制中继站对上行数 据的接收的中继站上行映射信息。
15. 一种中继设备, 包括:
下行接收装置, 用于接收来自基站的下行数据, 其中该下行数据包 括对于中继操作的控制信息;
下行处理装置, 用于构建要重发的下行数据;
下行发送装置, 用于按照所述控制信息规定的配置向各无线通信终 端重发所述构建的下行数据;
上行接收装置, 用于按照所述控制信息规定的配置接收来自所述各 无线通信终端的上行数据;
上行处理装置, 用于恢复所述各无线通信终端的上行数据; 上行发送装置, 用于按所述控制信息规定的配置向所述基站重发上 行数据。
16. 根据权利要求 15所述的中继设备,其中所述下行数据是指 MAC 层数据包; 并且上行数据是指 MAC层数据包。
17. 根据权利要求 15所述的中继设备, 其中所述下行数据是指突发 数据流; 并且上行数据是指突发数据流。
18. 根据权利要求 16所述的中继设备, 其中所述下行接收装置所接 收的下行 MAC层数据包是以所述中继设备的连接号所标识的 MAC层数 据包, 以及
其中所述下行处理装置还用于对所述以中继站的连接号所标识的 MAC层数据包进行解封装;
所述上行处理装置还用于对所述恢复的上行 MAC 层数据包以所述 中继设备的连接号再次进行封装。
19. 根据权利要求 16所述的中继设备, 其中
所述下行处理装置还用于按照连接号映射表将各个下行 MAC 层数 据包的连接号更新为对应于所述各无线通信终端的连接号;
所述上行处理装置还用于按照所述连接号映射表将各个上行 MAC 层数据包的连接号恢复为各自相对于基站的连接号;
其中, 所述连接号映射表是预先配置的, 并且其中各 MAC层数据包 的相对于基站的连接号与对应于各无线通信终端的连接号——对应。
20. 根据权利要求 15-19中的任何一项所述的中继设备,其中所述对 于中继操作的控制信息是中继站映射信息。
21. 根据权利要求 20所述的中继设备, 其中当所述中继设备服务于 覆盖扩展型场景时, 所述下行处理装置还用于将所述接收到的中继站映 射信息构建或者复制成将发送给无线通信终端的映射信息, 并且所述下 行处理装置构建的下行数据包括所述将发送给无线通信终端的映射信息 和前导信号。
22. 根据权利要求 20所述的中继设备, 其中所述中继站映射信息包 括用于控制中继站对下行数据的重发的中继站下行映射信息, 以及用于 控制中继站对上行数据的接收的中继站上行映射信息。
23. 一种无线中继系统, 包括根据权利要求 10所述的基站设备和根 据权利要求 15所述的中继设备。
PCT/CN2007/001418 2006-04-27 2007-04-27 Procédé de relais, station de base, dispositif de relais et système de relais d'un système d'accès sans fil Ceased WO2007128219A1 (fr)

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