WO2018098621A1 - 通信方法与装置 - Google Patents
通信方法与装置 Download PDFInfo
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- WO2018098621A1 WO2018098621A1 PCT/CN2016/107680 CN2016107680W WO2018098621A1 WO 2018098621 A1 WO2018098621 A1 WO 2018098621A1 CN 2016107680 W CN2016107680 W CN 2016107680W WO 2018098621 A1 WO2018098621 A1 WO 2018098621A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
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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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
Definitions
- the present invention relates to the field of communication technologies, and in particular, to a cooperative communication technology between multiple nodes.
- the communication system is required to be able to transmit a packet of about 300 kb in 1 ms with a reliability of 1*10 -5 (the error block rate is less than 10 -5 ) in a depth coverage scenario. That is, the transmission rate of the communication system data is required to be 300 Mbps.
- existing communication systems cannot meet the requirements of coverage, delay, reliability, and peak rate at the same time.
- data transmission is generally performed by means of cooperative transmission.
- the source node A wants to transmit data to the destination node B
- the source node A and the destination node B determine at least one node as a cooperation node according to its own topology information (in FIG. 1, the cooperation node is node C and node D).
- the cooperation node is node C and node D.
- source node A transmits data to cooperative nodes C, D and destination node B, respectively.
- the cooperative nodes C and D forward the data to the destination node B at time T2.
- the above existing cooperative communication method has the following drawbacks: 1) Regardless of the quality of the transmission channel, the data transmission delay is fixed (ie, the transmission delay from the source node A to the destination node B is unified: T1+Tp+ T2, where the Tp processing time is the processing time for the cooperative node to process the data), wasting the transmission resource; 2) regardless of whether the source node A successfully transmits the data to the destination node B, all the cooperative nodes C and D need to be at the T2 At the moment, the data is forwarded to the destination node B.
- the cooperative nodes C and D will still perform the forwarding operation repeatedly, increasing the power consumption of the destination node B, the cooperation nodes C and D, and the cooperative node forwarding multiple times. Operation
- the use of communication system resources also increases the interference of the communication system.
- the present invention provides a communication method and a terminal, which can fully utilize the gain of reliable data transmission brought by cooperative communication, and avoids an increase in delay caused by unnecessary multiple forwarding operations of the cooperative node.
- an embodiment of the present invention provides a communication method, where the method includes:
- the collaboration node receives the first data sent by the source node
- the cooperative node receives an acknowledgement signal sent by the destination node;
- the cooperative node stops forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node.
- the method further includes:
- the cooperative node receives a non-acknowledgment signal sent by the destination node;
- the cooperative node forwards the first data or the second data including the first data information that is encoded by the cooperation node to the destination node according to the non-acknowledgment signal.
- the cooperative node communicates with the source node using a first communication link; the cooperative node communicates with the destination node using a second communication link;
- the first communication link and the second communication link are in different operating frequency bands.
- an embodiment of the present invention provides a communication method, where the method includes:
- the source node sends the first data to the destination node
- the source node When the destination node does not correctly decode the first data, the source node receives a non-acknowledgment signal sent by the destination node;
- the source node retransmits the first data or the third data including the first data information that is encoded by the source node to the destination node according to the non-acknowledgment signal.
- the method further includes:
- the source node When the destination node correctly decodes the first data, the source node receives an acknowledgement signal sent by the destination node;
- the source node stops retransmitting the first data to the destination node or the third data including the first data information that is encoded by the source node according to the acknowledgement signal.
- the method before the source node receives the non-acknowledgment signal sent by the destination node, when the destination node does not correctly decode the first data, the method further includes:
- the source node sends the first data to the cooperation node.
- the method before the source node sends the first data to the destination node, the method further includes:
- the source node sends a request to send the RTS signal to the destination node and the first node, where the RTS signal includes first collaboration request information;
- the source node receives an allowable CTS signal sent by the destination node according to the RTS signal, and the CTS signal includes second cooperation request information.
- the RTS signal further includes a first pre-relay of the third data including the first data information that is retransmitted by the source node or processed by the source node. Leave time
- the third data that includes the first data information that is retransmitted by the source node to the destination node or that is encoded by the source node includes:
- the source node retransmits the first data or the third data including the first data information that is encoded by the source node to the destination node.
- the RTS signal further includes the first node as a collaboration section a second reservation time of the second data including the first data information that is forwarded by the node of the point or the first data or the node that is the cooperative node in the first node;
- the RTS signal further includes a third reserved time that the destination node sends the non-acknowledgment signal or the acknowledgement signal multiple times.
- the source node communicates with the cooperation node using a first communication link; and the source node communicates with the destination node using a third communication link;
- the first communication link and the third communication link are in different operating frequency bands.
- an embodiment of the present invention provides a communication method, where the method includes:
- the destination node receives the first data sent by the source node
- the destination node When the destination node does not correctly decode the first data, the destination node sends a non-acknowledgment signal to the source node and the cooperation node.
- the method further includes:
- the method further includes:
- the destination node When the destination node correctly decodes the first data, the destination node sends an acknowledgement signal to the source node and the cooperation node.
- the method before the destination node receives the first data sent by the source node, the method further includes:
- the destination node receives a request sent by the source node to send an RTS signal, where the RTS signal includes first cooperation request information;
- the destination node sends a CTS signal to the source node and the first node, where the CTS signal includes second cooperation request information.
- the CTS signal further includes a first pre-relay of the third data including the first data information that is retransmitted by the source node or processed by the source node. a time period in which the node as the cooperation node in the first node forwards the first data or the second data including the first data information that is encoded by a node that is a cooperative node in the first node Second reserved time;
- the CTS signal further includes a third reserved time that the destination node sends the non-acknowledgment signal or the acknowledgement signal multiple times;
- the destination node sends a non-acknowledgment signal or an acknowledgement signal to the source node and the collaboration node, and specifically includes:
- the destination node sends the non-acknowledgment signal or the acknowledgement signal to the source node and the cooperative node.
- the destination node communicates with the cooperation node using a second communication link; and the destination node communicates with the source node using a third communication link;
- the second communication link and the third communication link are in different operating frequency bands.
- an embodiment of the present invention provides a communication method, where the method includes:
- the first node determines whether the request to send the RTS signal sent by the source node and the permission to send the CTS signal sent by the destination node are received;
- the first node determines that the first node is a candidate cooperative node.
- the method further includes:
- the first node that is the candidate cooperation node determines that the first node is a cooperation node.
- the method further includes:
- first channel quality value exceeds the first quality threshold
- second channel quality value exceeds the second quality threshold
- the first node determines whether the first channel quality value exceeds the third quality threshold, and Whether the third quality value exceeds a fourth channel quality threshold;
- the first node Determining, when the CTS signal includes a first path between the destination node and the source node, the first node determining a second path delay between the first node and the destination node;
- the first node that is the candidate cooperation node determines that the first node is a cooperative node.
- an embodiment of the present invention provides a communication device, where the device includes:
- a receiving unit configured to receive first data sent by the source node
- the receiving unit is further configured to: when the destination node correctly decodes the first data, receive an acknowledgement signal sent by the destination node;
- a sending unit configured to stop, according to the acknowledgement signal, the second data that includes the first data information by forwarding the first data to the destination node or performing encoding processing by using the device.
- the receiving unit is further configured to: when the destination node does not correctly decode the first data, receive a non-acknowledgment signal sent by the destination node;
- the sending unit is further configured to: forward, according to the non-acknowledgment signal, the first data or the second data including the first data information that is encoded by the device to the destination node.
- the apparatus communicates with the source node using a first communication link; the apparatus communicates with the destination node using a second communication link;
- the first communication link and the second communication link are in different operating frequency bands.
- an embodiment of the present invention provides a communication device, where the device includes:
- a sending unit configured to send first data to the destination node
- a receiving unit configured to receive a non-acknowledgment signal sent by the destination node when the destination node does not correctly decode the first data
- the sending unit is further configured to: retransmit the first data or the third data including the first data information that is encoded by the device according to the non-acknowledgment signal to the destination node.
- the receiving unit is further configured to: when the destination node correctly decodes the first data, receive an acknowledgement signal sent by the destination node;
- the sending unit is further configured to stop, according to the acknowledgement signal, the third data that includes the first data information by retransmitting the first data to the destination node or performing encoding processing by the device.
- the sending unit is further configured to send the first data to the cooperation node.
- the sending unit is further configured to send a request to send the RTS signal to the destination node and the first node, where the RTS signal includes first collaboration request information;
- the receiving node is further configured to receive a CTS signal that is sent by the destination node according to the RTS signal, where the CTS signal includes second collaboration request information.
- the RTS signal sent by the sending unit further includes a third unit that includes the first data information that is retransmitted by the sending unit or encoded by the device.
- the first reservation time of the data
- the sending unit is specifically configured to: retransmit the first data to the destination node or perform the encoding process by using the apparatus, where the first data information is included in the first reserved time Three data.
- the RTS signal sent by the sending unit further includes a node that is a cooperative node in the first node forwarding the first data or a node that is a cooperative node in the first node. a second reserved time of the second data including the first data information that is encoded;
- the RTS signal sent by the sending unit further includes a third reserved time that the destination node sends the non-acknowledgment signal or the acknowledgement signal multiple times.
- the apparatus communicates with the cooperating node using a first communication link; the device communicates with the destination node using a third communication link;
- the first communication link and the third communication link are in different operating frequency bands.
- an embodiment of the present invention provides a communication device, where the device includes:
- a receiving unit configured to receive first data sent by the source node
- a decoding unit configured to perform decoding processing on the first data
- a sending unit configured to send a non-acknowledgment signal to the source node and the cooperative node when the decoding unit does not correctly decode the first data.
- the sending unit is further configured to: when the decoding unit correctly decodes the first data, send an acknowledgement signal to the source node and the cooperation node.
- the receiving unit is further configured to receive the first data that is forwarded by the collaboration node or the second data that includes the first data information that is encoded by the collaboration node;
- the third data including the first data information that is processed by the source node.
- the receiving unit is further configured to: receive a request sent by the source node to send an RTS signal, where the RTS signal includes first collaboration request information;
- the sending unit is further configured to send, according to the RTS signal, a CTS signal to the source node and the first node, where the CTS signal includes second cooperation request information.
- the RTS signal received by the receiving unit further includes: the source node retransmits the first data or the first data information that is encoded by the source node a first reservation time of three data, a node that is a cooperative node in the first node forwarding the first data, or an encoding process performed by a node that is a cooperative node in the first node, including the first data information Second reservation time of the second data;
- the CTS signal sent by the sending unit further includes a third reserved time that the sending unit sends the non-acknowledgment signal or the acknowledgement signal multiple times;
- the sending unit is specifically configured to send the non-acknowledgment signal or the acknowledgement signal to the source node and the cooperative node during the third reserved time.
- the apparatus communicates with the cooperating node using a second communication link; the device communicates with the source node using a third communication link;
- the second communication link and the third communication link are in different operating frequency bands.
- an embodiment of the present invention provides a communication device, where the device includes:
- a determining unit configured to determine whether the request to send the RTS signal sent by the source node and the permission to send the CTS signal sent by the destination node are received;
- a determining unit configured to determine that the device is a candidate cooperative node if the first node receives the RTS signal sent by the source node and receives the CTS signal sent by the destination node.
- the determining unit is further configured to: when the RTS signal includes first cooperation request information, and the CTS signal includes second cooperation request information, determine that the device is a cooperative node.
- the device further includes:
- An acquiring unit configured to acquire a first channel quality value between the device and the source node, and a second channel quality value between the device and the destination node;
- the determining unit is further configured to: determine whether the first channel quality value exceeds a first quality threshold, and whether the second channel quality value exceeds a second quality threshold;
- the determining unit is further configured to: if the first channel quality value exceeds the first quality threshold, and the second channel quality value exceeds the second quality threshold, determine that the device is a cooperative node;
- the determining unit is further configured to: when the CTS signal includes a third channel quality value between the destination node and the source node, the first node determines whether the first channel quality value exceeds the a third quality threshold, and whether the third quality value exceeds a fourth channel quality threshold;
- the determining unit is further configured to: if the first channel quality value exceeds the third quality threshold, and the third channel quality value exceeds the fourth quality threshold, determine that the device is a cooperative node;
- the determining unit is further configured to: when the CTS signal includes a first path between the destination node and the source node, determine a second path delay between the device and the destination node ;
- the determining unit is further configured to: determine, according to the first path delay and the second path delay, whether a difference between the first path delay and the second path delay does not exceed a delay threshold ;
- the determining unit is further configured to determine that the device is a cooperative node if a difference between the first path delay and the second path delay does not exceed the delay threshold.
- an embodiment of the present invention provides a collaboration node, where the collaboration node has a function of implementing the behavior of the cooperative node in the foregoing method.
- the functions may be implemented by hardware or by corresponding software implemented by hardware.
- the hardware or software includes one or more modules corresponding to the functions described above.
- an embodiment of the present invention provides a source node, where the source node has a function of implementing the behavior of the source node in the actual method.
- the functions may be implemented by hardware or by corresponding software implemented by hardware.
- the hardware or software includes one or more modules corresponding to the functions described above.
- an embodiment of the present invention provides a destination node, where the destination node has a function of implementing a behavior of a destination node in the foregoing method.
- the functions may be implemented by hardware or by corresponding software implemented by hardware.
- the hardware or software includes one or more modules corresponding to the functions described above.
- an embodiment of the present invention provides a first node, where the first node has a function of implementing the behavior of the first node in the actual method.
- the functions may be implemented by hardware or by corresponding software implemented by hardware.
- the hardware or software includes one or more modules corresponding to the functions described above.
- the solution source node or the cooperative node determines whether to retransmit or forward data according to a signal sent by the destination node.
- the source node or the cooperative node can release communication resources with the destination node, thereby saving communication system resources, avoiding waste of resources, improving communication system efficiency, and reducing communication. System interference.
- FIG. 2 is a schematic diagram of a communication system according to an embodiment of the present invention.
- FIG. 3 is a flowchart of a communication method according to an embodiment of the present invention.
- FIG. 4 is a flowchart of another communication method according to an embodiment of the present invention.
- FIG. 5 is a flowchart of another communication method according to an embodiment of the present invention.
- FIG. 6 is a flowchart of another communication method according to an embodiment of the present invention.
- FIG. 7 is a sequence diagram of a communication method according to an embodiment of the present invention.
- FIG. 8 is a sequence diagram of another communication method according to an embodiment of the present invention.
- FIG. 9 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention.
- FIG. 10 is a schematic structural diagram of another communication device according to an embodiment of the present disclosure.
- FIG. 11 is a schematic structural diagram of another communication apparatus according to an embodiment of the present invention.
- FIG. 12 is a schematic structural diagram of another communication apparatus according to an embodiment of the present disclosure.
- FIG. 13 is a schematic structural diagram of hardware of a collaboration node according to an embodiment of the present disclosure.
- FIG. 14 is a schematic structural diagram of hardware of a source node according to an embodiment of the present disclosure.
- FIG. 15 is a schematic structural diagram of hardware of a destination node according to an embodiment of the present disclosure.
- FIG. 16 is a schematic structural diagram of hardware of a first node according to an embodiment of the present disclosure.
- the network architecture and the service scenario described in the embodiments of the present invention are used to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments of the present invention.
- the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.
- a communication system to which the embodiment of the present invention is applied includes a source node, a destination node, and One less collaboration node.
- Data transmission between nodes can be transmitted by radio waves, or by visible light, laser, power lines, optical fibers, coaxial cables, copper strands, photons, quantum, and the like.
- the source node, the destination node, and the collaboration node may be any communication node.
- the technology described in the present invention can be applied to a Long Term Evolution (LTE) system, or other wireless communication systems using various radio access technologies, for example, using code division multiple access, frequency division multiple access, and time division.
- LTE Long Term Evolution
- it can also be applied to the subsequent evolution system using the LTE system, such as the fifth generation 5G system and the like.
- the LTE system is taken as an example here.
- the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is used as the radio access network and the evolved packet core network (English: Evolved Packet, Core, referred to as EPC). ) as the core network.
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- EPC evolved Packet, Core
- An embodiment of the present invention provides a communication method, and a source node, a destination node, and a collaboration node based on the method.
- the source node sends the first data to the destination node and the collaboration node, where the collaboration node may be one or more.
- the destination node decodes the received first data and generates an acknowledgment signal (ACK) or a non-acknowledgement signal (NACK) according to the decoding result. If decoded correctly, an acknowledgment signal is generated, and if it cannot be decoded correctly, a non-acknowledgement signal is generated.
- the destination node sends an acknowledgment signal or a non-acknowledgement signal to the source node and the cooperation node.
- the cooperation node stops forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node.
- the source node also stops retransmitting the first data to the destination node or the third data including the first data information that is encoded by the source node.
- the cooperation node forwards the number to the destination node.
- the source node may also retransmit the first data to the destination node or the third data including the first data information that is encoded by the source node.
- the destination node receives the corresponding retransmission data, including: the destination node receives the first data retransmitted by the source node or the third data that includes the first data information after being encoded by the source node; or the destination node receives the first forwarding by the cooperation node.
- the non-acknowledgement signal may be further sent, so that the request source node and the cooperation node send the retransmission data again.
- the source node and the cooperating node may send retransmission data to the destination node multiple times until a predetermined maximum number of retransmissions is reached. Each time the retransmitted data is sent, both the source node and the cooperating node can send the same retransmission data, or can send different retransmission data, and the retransmission data sent each time can also be different from each other or the same.
- the destination node by applying the ARQ mechanism in cooperative communication, performs decoding after receiving the first first data, and sends a feedback signal to the source node and the cooperation node according to the decoding result, and the source node And the cooperative node retransmits the first data to the destination node or the retransmission data including the first data information that is encoded by the source and the cooperation node according to the received feedback signal.
- the communication method provided by the embodiment of the present invention is no longer. In the existing cooperative communication, after receiving the data sent by the source node, the destination node still waits for the data forwarded by the cooperation node, thereby reducing the data transmission delay.
- the source node or the cooperative node determines whether to retransmit or forward the data according to the signal sent by the destination node.
- the source node or the cooperative node can release communication resources with the destination node, thereby saving communication system resources, avoiding waste of resources, improving communication system efficiency, and reducing communication. System interference.
- first communication link is used for communication between the collaboration node and the source node; the collaboration section
- the first communication link, the second communication link, and the third communication link are in different working frequency bands.
- the communication link in the embodiment of the present invention is a general term for interactive communication between nodes.
- Each node can use multiple communication links for communication when performing specific communication.
- the communication link that the cooperation node receives the communication link that the source node sends the first data, the communication link that the cooperation node forwards the data to the destination node, and the communication link that the cooperation node receives the destination node sends the acknowledgement signal and/or the non-acknowledgement signal are collectively referred to as The first communication link.
- the communication between the source node, the destination node, and the cooperative node may adopt different channels, such as different communication frequency bands, to improve communication reliability.
- the communication link between the source node and the destination node and the cooperation node adopts an unlicensed frequency band
- the communication link between the cooperation node and the destination node adopts a licensed frequency band
- the licensed frequency band has more than the unlicensed frequency band.
- High transmission reliability which can reduce the number of retransmissions, improve communication reliability, and reduce communication delay.
- FIG. 3 is a communication method according to an embodiment of the present invention.
- an execution entity is a collaboration node, and specifically includes the following steps:
- Step 310 The collaboration node receives the first data sent by the source node.
- the source node A, the destination node B, and the cooperative node C in the communication system are taken as an example for description.
- Source node A is ready to communicate with destination node B.
- the source node A sends the first data to the coordinating node C.
- the first data is the data to be transmitted of the source node A.
- the source node A sends the first data to the cooperation node C, and the source node A also sends the first data to the destination node B.
- Step 320 When the destination node correctly decodes the first data, the cooperative node receives an acknowledgement signal sent by the destination node.
- the destination node B After receiving the first data, the destination node B performs decoding processing on the first data. The node decodes the data into the prior art and will not repeat it here. The destination node B generates a corresponding signal according to the result of the decoding process, and transmits the signal to the cooperative node C.
- the destination node B When the destination node B correctly decodes the first data, the destination node B generates an acknowledgment signal and transmits an acknowledgment signal to the coordinating node C.
- the destination node B transmits an acknowledgment signal to the cooperative node C, and the destination node B also sends an acknowledgment signal to the source node A.
- Step 330 The cooperative node stops forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node according to the acknowledgement signal.
- the cooperative node C determines that the destination node B has received the first data, and correctly decodes the first data, and the cooperative node C stops forwarding the first data to the destination node B according to the acknowledgment signal.
- the second data including the first data information that is encoded by the cooperation node.
- the source node A determines that the destination node B has received the first data, and correctly decodes the first data, and the source node A stops retransmitting the first data to the destination node B according to the acknowledgment signal.
- the data or the third data including the first data information that is encoded by the source node.
- the destination node starts decoding after receiving the first data sent by the source node, and sends an acknowledgement signal or a non-acknowledgement signal to the cooperative node according to the decoding result.
- the cooperation node stops forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node according to the acknowledgement signal sent by the destination node.
- the embodiment of the present invention further includes the step of the cooperative node receiving the non-acknowledgment signal sent by the destination node.
- the cooperative node initiates a cooperative transmission mode according to the received non-acknowledgment signal.
- the method of forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node improves communication reliability through cooperative communication.
- the destination node B when the destination node B does not correctly decode the first data, the destination node B generates a non-acknowledgement signal and transmits a non-acknowledgement signal to the cooperative node C.
- the cooperative node C After receiving the non-acknowledgment signal, the cooperative node C determines that the destination node B has received the first data, but does not correctly decode the first data, and the cooperative node C initiates the cooperative transmission mode according to the non-acknowledgment signal.
- the cooperative node C performs different encoding processes on the first data before forwarding the data to the destination node multiple times, so that each forwarded data has different redundancy versions on the basis of the first data information, thereby improving communication. Quality; or, by re-transmitting the retransmission data of the cooperative node C and the retransmission data of the source node A, the communication quality can be improved.
- both the cooperative node C and the source node A can retransmit the same data, for example, the first data is retransmitted, so that the receiving process of the destination node B can be simplified.
- the cooperative node C forwards the first data to the destination node B or the second data including the first data information that is encoded by the cooperation node.
- the destination node B transmits a non-acknowledgment signal to the cooperative node C, and the destination node B also sends a non-acknowledgment signal to the source node A.
- the source node A determines that the destination node B has received the first data, but does not correctly decode the first data, and the source node A starts the retransmission mode according to the non-acknowledgment signal.
- the source node A performs different encoding processes on the first data before forwarding the data to the destination node multiple times, so that each forwarded data has different redundancy versions on the basis of the first data information, thereby improving communication. Quality; or, by re-transmitting the retransmission data of the source node A and the retransmission data of the coordinating node C, the communication quality can be improved.
- both the source node A and the cooperative node C can retransmit the same data, for example, retransmit the first data, which can simplify the receiving process of the destination node B.
- the source node A retransmits the first data to the destination node B.
- the destination node B may receive the retransmission data sent by the cooperation node C or the source node A, respectively.
- the retransmission data transmitted by the cooperation node C or the source node A is received at the same time.
- the cooperative node when the source node retransmits the first data to the destination node, the cooperative node also forwards data to the destination node, and the source node and the cooperative node transmit data to the destination node through multiple channels, thereby improving the reliability of the communication system.
- the cooperative node C communicates with the source node A using the first communication link; the cooperative node C and the destination node B communicate using the second communication link.
- the first communication link and the second communication link are in different working frequency bands.
- the communication link in the embodiment of the present invention is a general term for interactive communication between nodes.
- Each node can use multiple communication links for communication when performing specific communication.
- the cooperative node C receives the communication link in which the source node A transmits the first data
- the communication link in which the cooperative node C forwards the data to the destination node B
- the coordinated node C receives the acknowledgement signal and/or the non-acknowledgement signal from the destination node B.
- Communication links are collectively referred to as a first communication link.
- the communication between the source node A, the destination node B, and the cooperative node C may adopt different channels, such as different communication frequency bands, to improve communication reliability.
- the communication link between the source node A and the destination node B and the cooperative node C adopts an unlicensed frequency band
- the communication link between the cooperative node C and the destination node B adopts a licensed frequency band
- the licensed frequency band has Higher transmission reliability than unlicensed bands, which reduces the number of retransmissions, improves communication reliability, and reduces communication delay.
- the cooperative node C after receiving the non-acknowledgment signal fed back by the destination node B, the cooperative node C forwards the first data or the second data to the destination node B; the source node A goes to the destination node B. Retransmit the first data or the third data.
- the foregoing cooperative node C forwards the first data or the second data, and the source node A retransmits the first data or the third data may be performed at the same frequency. For example, at time T1, the source node A and the cooperative node C are in the first frequency band. Retransmitting and forwarding the first data, the second data, and the third data to the destination node B.
- the foregoing cooperative node C forwards the first data or the second data, and the source node A retransmits the first data or the third data may be performed at a non-simultaneous non-synchronous frequency.
- the cooperative node C moves to the destination in the first frequency band.
- Node B forwards the first data or the second data,
- the source node A forwards the first data or the like to the destination node B in the second frequency band.
- the method further includes the step of the cooperative node performing decoding processing on the first data, by which the cooperative node that correctly decodes the first data can continue to participate as a cooperative node.
- the waste of communication system resources is avoided.
- the cooperative node C After receiving the first data, the cooperative node C performs decoding processing on the first data. When the cooperative node C does not correctly decode the first data, the cooperative node C confirms that it cannot implement the function as the cooperative node, and generates the first notification signal.
- the cooperation node C sends a first notification signal to the source node A and the destination node B, the first notification signal is used to make the source node A and the destination node B confirm that the cooperation node C is no longer a cooperation node; when the cooperation node C corrects the first data
- the cooperative node C confirms that it can implement the function as a cooperative node, and generates a second notification signal.
- the cooperative node C transmits a second notification signal to the source node A and the destination node B, and the second notification signal is used to cause the source node A and the destination node B to confirm that the cooperative node C is still a cooperative node.
- the other cooperative nodes After receiving the first data, the other cooperative nodes perform the above-mentioned decoding process, and generate a corresponding notification signal according to the decoding result, which will not be repeated here.
- only the cooperative node that successfully receives the first data sent by the source node can forward the first data or the second data after receiving the non-acknowledgment signal sent by the destination node. operating. If the collaboration node does not successfully receive the first data sent by the source node, the collaboration node does not participate in the current collaborative communication.
- FIG. 4 is another communication method according to an embodiment of the present invention.
- an execution entity is a source node, and specifically includes the following steps:
- Step 410 The source node sends the first data to the destination node.
- the source node A, the destination node B, and the cooperative node C in the communication system are taken as an example for description.
- Source node A is ready to communicate with destination node B.
- the source node A sends the first data to the destination node B.
- the first data is the data to be transmitted of the source node A.
- the source node A also sends the first data to the cooperation node C while transmitting the first data to the destination node B.
- Step 420 When the destination node does not correctly decode the first data, the source node receives a non-acknowledgment signal sent by the destination node.
- the destination node B After receiving the first data, the destination node B performs decoding processing on the first data. The node decodes the data into the prior art and will not repeat it here. The destination node B generates a corresponding signal according to the result of the decoding process, and transmits the signal to the source node A.
- the destination node B when the destination node B does not correctly decode the first data, the destination node B generates a non-acknowledgement signal and transmits a non-acknowledgement signal to the source node A.
- the destination node B sends a non-acknowledgment signal to the source node A, and the destination node B also sends a non-acknowledgment signal to the cooperative node C.
- Step 430 The source node retransmits the first data or the third data including the first data information that is encoded by the source node to the destination node according to the non-acknowledgment signal.
- the source node A determines that the destination node B has received the first data, but does not correctly decode the first data, and the source node A is within the preset number of retransmissions, according to the non-authentication.
- the acknowledgment signal starts the retransmission mode, and retransmits the first data to the destination node B or the third data including the first data information that is encoded by the source node.
- the source node A performs different encoding processing on the first data before retransmitting the data to the destination node B multiple times, so that each forwarded data has the first data information, and has Different redundancy versions, thereby improving the communication quality; or, by re-transmitting the retransmission data of the source node A and the retransmission data of the cooperation node C, the communication quality can be improved.
- both the source node A and the cooperative node C can retransmit the same data, for example, retransmit the first data, which can simplify the receiving process of the destination node B.
- the cooperative node C determines that the destination node B has received the first data, but does not correctly decode the first data, and the cooperative node C According to the non-confirmation signal, the cooperative transmission mode is started, and the first data or the second data including the first data information that is encoded by the cooperation node is forwarded to the destination node B.
- the cooperative node C performs different encoding processing on the first data before forwarding the data to the destination node multiple times, so that each forwarded data has different redundancy versions on the basis of the first data information.
- the communication quality is improved.
- the communication quality can be improved by enabling the retransmission data of the cooperative node C and the retransmission data of the source node A to be cooperatively decoded.
- both the cooperative node C and the source node A can retransmit the same data, for example, the first data is retransmitted, so that the receiving process of the destination node B can be simplified.
- the destination node B may further transmit a non-acknowledgement signal, thereby requesting the source node A and the coordinating node C to retransmit the retransmission again. data.
- the source node A and the cooperative node C may send the retransmission data to the destination node multiple times until the predetermined maximum number of retransmissions. Each time the retransmitted data is sent, both the source node A and the coordinating node C can send the same retransmission data, and can also transmit different retransmission data, and the retransmission data sent each time can also be different from each other or the same.
- the destination node B may receive the retransmission data sent by the cooperation node C or the source node A, or may receive the retransmission data sent by the cooperation node C or the source node A at the same time.
- the cooperative node when the source node retransmits the first data to the destination node, the cooperative node also forwards data to the destination node, and the source node and the cooperative node transmit data to the destination node through multiple channels, thereby improving the reliability of the communication system.
- the source node A and the cooperation node C communicate using the first communication link; the source node A and the destination node B communicate using the third communication link.
- the first communication link and the third communication link are in different working frequency bands.
- the communication link in the embodiment of the present invention is a general term for interactive communication between nodes.
- Each node can use multiple communication links for communication when performing specific communication.
- the cooperative node C receives a communication link in which the source node A transmits the first data, the cooperative node C forwards the communication link to transmit data to the destination node B, and the cooperative node C receives the destination node B to transmit an acknowledgement signal and/or indeterminate
- the communication links of the acknowledged signals are collectively referred to as the first communication link.
- the communication between the source node A, the destination node B, and the cooperative node C may adopt different channels, such as different communication frequency bands, to improve communication reliability.
- the communication link between the source node A and the destination node B and the cooperative node C adopts an unlicensed frequency band
- the communication link between the cooperative node C and the destination node B adopts a licensed frequency band
- the licensed frequency band has Higher transmission reliability than unlicensed bands, which reduces the number of retransmissions, improves communication reliability, and reduces communication delay.
- the cooperative node C after receiving the non-acknowledgment signal fed back by the destination node B, the cooperative node C forwards the first data or the second data to the destination node B; the source node A goes to the destination node B. Retransmit the first data or the third data.
- the foregoing cooperative node C forwards the first data or the second data, and the source node A retransmits the first data or the third data may be performed at the same frequency. For example, at time T1, the source node A and the cooperative node C are in the first frequency band. Retransmitting and forwarding the first data, the second data, and the third data to the destination node B.
- the foregoing cooperative node C forwards the first data or the second data, and the source node A retransmits the first data or the third data may be performed at a non-simultaneous non-synchronous frequency.
- the cooperative node C moves to the destination in the first frequency band.
- the Node B forwards the first data or the second data.
- the source node A forwards the first data and the like to the destination node B in the second frequency band.
- the source node sends the first data to the destination node by applying the communication method provided by the embodiment of the present invention.
- the destination node After receiving the first data, the destination node starts decoding, and sends an acknowledgment signal or a non-acknowledgement signal to the source node according to the decoding result.
- the source node sends the acknowledgment signal according to the destination node.
- the acknowledgment signal stops the retransmission of the first data to the destination node or the third data including the first data information that is encoded by the source node.
- the source node retransmits data to the destination node according to the signal sent by the destination node, which saves communication system resources and avoids resource waste.
- the step of receiving, by the source node, the acknowledgement signal sent by the destination node is further included.
- the source node stops retransmitting the first data to the destination node or the third data including the first data information processed by the source node according to the received acknowledgement signal, thereby avoiding the pass.
- the waste of the system resources reduces the data transmission delay.
- the destination node B when the destination node B correctly decodes the first data, the destination node B generates an acknowledgment signal and transmits an acknowledgment signal to the source node A. After receiving the acknowledgment signal sent by the destination node B, the source node A determines that the destination node B has received the first data, and correctly decodes the first data, and the source node A stops retransmitting to the destination node B according to the acknowledgment signal.
- a data or third data including the first data information that is encoded by the source node.
- the destination node B sends an acknowledgment signal to the source node A, and the destination node B also sends an acknowledgment signal to the cooperative node C.
- the cooperative node C determines that the destination node B has received the first data, and correctly decodes the first data, and the cooperative node C stops forwarding the first data to the destination node B or performs coding through the cooperative node C.
- the processed second data containing the first data information.
- the method further includes the step of the source node receiving the notification signal sent by the cooperation node.
- the cooperative node that correctly decodes the first data can continue to participate as a cooperative node in the cooperative communication, thereby avoiding waste of communication system resources.
- the cooperative node C After receiving the first data, the cooperative node C performs decoding processing on the first data. When the cooperative node C does not correctly decode the first data, the cooperative node C confirms that it cannot implement the function as the cooperative node, and generates the first notification signal. The cooperative node C sends a first notification signal to the source node A, according to the first notification signal source node A, it is confirmed that the cooperative node C is no longer a cooperative node, and then the data to be transmitted is not subsequently sent to the cooperative node C; When a data is correctly decoded, the cooperative node C confirms that it can implement the function as a cooperative node, and generates a second notification signal.
- the coordinating node C sends a second notification signal to the source node A, and according to the second notification signal source node A, confirms that the cooperating node C is still acting as a cooperating node, and then continues to send the data to be transmitted to the cooperating node C.
- only the cooperative node that successfully receives the first data sent by the source node can perform the forwarding operation of the first data after receiving the non-acknowledgment signal sent by the destination node. If the collaboration node does not successfully receive the first data sent by the source node, the collaboration node does not participate in the current collaborative communication.
- step 410 of the embodiment of the present invention the step of selecting the cooperation node by the source node and the destination node is further included.
- the selected cooperative node can be involved in the cooperative communication, and the reliability of data transmission is improved.
- the source node A sends a request to send (English: Request To Send, RTS for short) signal to the destination node B and the first node.
- the RTS signal includes first cooperation request information.
- the destination node B obtains the first cooperation request information from the RTS signal.
- the destination node B determines, according to the first cooperation request information, that the source node A has initiated the cooperation request mode, that is, the source node A requests other nodes to perform cooperative communication.
- the destination node B generates a Clear To Send (CTS) signal according to the RTS signal.
- the CTS signal includes second cooperation request information.
- the destination node B may directly initiate the collaboration request mode to generate the second collaboration request information.
- a 1-bit field is added to the RTS signal and the CTS signal, and the field is used to carry the cooperation request information. For example, when the field is 1, it indicates that the source node A and the destination node B request cooperative communication; when the field is 0, it indicates that the source node A and the destination node B do not request cooperative communication.
- the destination node B transmits a CTS signal to the source node A.
- the source node A receives the CTS signal transmitted by the destination node B.
- the source node A acquires the second cooperation request information from the CTS signal.
- the source node A determines, according to the second cooperation request information, that the destination node B initiates the cooperation request mode.
- the source node A stores the topology information of the network between the source node A and the destination node B.
- the topology information includes the location, connection relationship, and the like of each node in the network.
- the source node A randomly selects at least one node as a cooperation node from the first node according to the topology information.
- the source node A also sends an RTS signal to the first node while transmitting the RTS signal to the destination node B. It can be understood that the destination node B also sends a CTS signal to the first node while transmitting the CTS signal to the source node A.
- the first node determines whether it can act as a cooperative node based on the RTS signal and the CTS signal. In an implementation, when the first node receives When the RTS signal of the first cooperation request information is included, and the CTS signal including the second cooperation request information is received, the first node determines that it is a cooperative node.
- the aforementioned first node is a node that is located around the source node A and the destination node B and is capable of receiving the RTS signal and the CTS signal.
- the source node A transmits the RTS signal
- only the destination node B receives the RTS signal.
- the selection of the cooperative node and the cooperative communication are no longer performed, that is, the source node A is only between the destination node B and the destination node B.
- Data communication is performed, and the cooperative nodes participating in the cooperative communication are no longer selected.
- the RTS signal further includes a first time when the source node A sends the RTS signal.
- the destination node B receives the RTS signal from the first time.
- the destination node B determines the time at which the source node sends the RTS signal according to the first time.
- the destination node B measures the channel quality value (eg, channel energy value, channel ratio, etc.) between the source node A and the destination node B according to the received RTS signal. Based on the channel quality value, the destination node B determines whether to initiate the cooperation request mode. For example, the destination node B compares the channel quality value with a preset quality threshold; if the channel quality value does not exceed the quality threshold, the destination node B confirms that the channel quality between the source node A and the source node A is poor, and the cooperation request mode needs to be started. At this time, the destination node B generates the second cooperation request information, and at the same time, according to the channel quality value, the destination node B determines the number of nodes requesting cooperation.
- the channel quality value eg, channel energy value, channel ratio, etc.
- the destination node B records the time when the RTS signal is received, and the destination node B determines the path delay between the destination node B and the source node A according to the first time and the time when the RTS signal is received. In one example, the destination node B takes the difference between the first time (Ttx_RTS) and the time (Trx_RTS) at which the RTS signal is received (Ttx_RTS-Trx_RTS) as the path delay between the destination node B and the source node A.
- the destination node B acquires the path loss L between itself and the source node A (the road)
- the path loss L is the difference between the RTS signal strength value transmitted by the source node A and the RTS signal strength value received by the destination node B.
- the source node A and the destination node B are estimated to be obtained.
- the length of the transmission path, and then the path delay between the destination node B and the source node A is estimated according to the length of the transmission path.
- the destination node B generates a Clear To Send (CTS) signal.
- the CTS signal includes the second cooperation request information, the channel quality value between the destination node B and the source node A, the path delay between the destination node B and the source node A, and the second time when the destination node B sends the CTS signal. The number of nodes that request cooperation with the destination node B.
- the destination node B transmits a CTS signal to the source node A.
- the source node A receives the CTS signal transmitted by the destination node B.
- the source node A acquires the second cooperation request information, the channel quality information between the destination node B and the source node A, the path delay between the destination node B and the source node A, and the destination node B transmits the CTS signal from the CTS signal.
- the source node A determines, according to the second cooperation request information, that the destination node B initiates the cooperation request mode.
- the source node A selects at least one node from the first node as the cooperation node according to the channel quality information, the path delay, the second time, and the number of nodes that the destination node B requests to cooperate.
- the source node A stores the topology information of the network between the source node A and the destination node B.
- the topology information includes the location, connection relationship, and the like of each node in the network.
- the source node A selects, according to the topology information, at least one node that satisfies the channel quality information, the path delay, the second time, and the number of nodes that the destination node B requests to cooperate from the first node as the cooperation node.
- the source node A also transmits an RTS signal to the first node while transmitting the RTS signal to the destination node B.
- the destination node B also transmits a CTS signal to the first node while transmitting the CTS signal to the source node A.
- the first node determines whether it can act as a cooperative node based on the RTS signal and the CTS signal.
- the first node acquires the first time from the RTS signal and the second time from the CTS signal. The first node determines whether it can be a cooperative node according to the first time and the second time.
- the first node determines a path delay between the first node and the destination node B based on the second time and the time at which the CTS signal was received. The first node determines, according to the path delay between the destination node B and the source node A obtained from the CTS signal, and the path delay between the first node and the destination node B, whether the difference between the two path delays is not If the delay threshold is exceeded, the first node determines that it is a cooperative node if the delay threshold is not exceeded.
- the first node determines a path delay between the first node and the source node A based on the first time and the time at which the RTS signal was received.
- the first node determines, according to the path delay between the destination node B and the source node A obtained from the CTS, and the path delay between the first node and the source node A, whether the difference between the two path delays does not exceed Delay threshold. If the delay threshold is not exceeded, the first node determines itself to be a cooperative node.
- the path delay between the destination node B and the source node A, the first node may be directly obtained from the CTS signal.
- the RTS signal sent by the source node A includes the first cooperation request information, the first time that the source node A sends the RTS signal, and the source node A retransmits the first data or passes through.
- the first reservation time of the third data including the first data information that is encoded by the source node.
- the source node A reserves communication time for subsequent communication with the destination node B and the cooperative node C.
- the first reserved time in the embodiment of the present invention is the time when the source node A reserved by the source node A retransmits the first data or the third data including the first data information that is encoded by the source node.
- the source node A receives the non-acknowledgment signal sent by the destination node B, the source node A initiates a retransmission mode.
- the source node A retransmits the first data to the destination node B or encodes the source node.
- the first reservation time is further used for causing the destination node B and the first node receiving the RTS signal to clarify the time at which the source node B retransmits the first data or the third data including the first data information that is encoded by the source node.
- the source node A receives the non-acknowledgment signal sent by the destination node B
- the source The node A confirms that the destination node B does not correctly decode the first data
- the source node A initiates the retransmission mode, and retransmits the first data to the destination node B or the third data including the first data information that is encoded by the source node. .
- the source node A When the source node A has retransmitted the first data to the destination node B or the third data including the first data information that is encoded by the source node, and has not exceeded the first reservation time, the source node A may go to the first The node as a cooperative node in the node sends a resource release signal, which is used to notify the node that the communication resource between the source node A and the destination node B can be released, thereby improving resource utilization of the communication system.
- the RTS signal sent by the source node A includes the first cooperation request information, the first time and the first reservation time that the source node A sends the RTS signal, and the first node.
- the second reservation time of the second data including the first data information that is forwarded by the node that is the cooperative node or that is encoded by the node that is the cooperative node in the first node.
- the source node A reserves communication time for subsequent communication with the destination node B and the cooperation node.
- the second reserved time in the embodiment of the present invention is that the node that is the cooperative node in the first node reserved by the source node A forwards the first data or the first data that is encoded by the node that is the cooperative node in the first node.
- the time of the second data of the message When the node as the cooperation node in the first node receives the non-acknowledgment signal sent by the destination node B, the node as the cooperation node initiates the cooperative transmission mode, and forwards the first data or the destination data to the destination node B in the second reserved time.
- the second data including the first data information is encoded by the node as the cooperation node in the first node.
- the foregoing first reservation time and the second reservation time may be the same reservation time, or may be different reservation times, and may be configured according to actual conditions.
- the RTS signal sent by the source node A further includes a third reserved time that the destination node B reserved by the source node sends the non-acknowledgment signal or the acknowledgement signal multiple times. Since the destination node B cannot successfully decode the first data once, the destination node B needs to decode the first data multiple times. Therefore, the source node A may send multiple times before the RTS signal is sent. The time for confirming the signal or confirming the signal is reserved.
- the third pre- During the stay time, the destination node B sends an acknowledgment signal to the source node A, the cooperation node (the cooperation node is a node that is a cooperative node in the first node); when the destination node B does not correctly decode the first data, in the third During the reserved time, the destination node B sends a non-acknowledgment signal to the source node A and the cooperation node.
- the cooperation node is a node that is a cooperative node in the first node
- the destination node B sends a non-acknowledgment signal to the source node A and the cooperation node.
- the destination node B has decoded the first data and sends a signal to the source node A and the cooperation node. After the destination node B has sent the corresponding signal to the source node A and the cooperation node, and the third reservation time has not been reached, the destination node B may send a resource release signal to the cooperation node, where the resource release signal is used to notify the cooperation node that the The communication resources between the source node A and the destination node B are released, thereby improving the resource utilization of the communication system.
- the RTS signal may further include a time when the destination node reserved by the source node sends the CTS signal, a time when the source node sends the first data, and a time when the destination node sends the acknowledgement signal or the non-acknowledgment signal for the first time; CTS signal The time may also include the time when the source node reserved by the destination node sends the first data, and the time when the destination node sends the acknowledgement signal or the non-acknowledgement signal for the first time. It can be understood that the above reservation time can be flexibly set according to actual conditions.
- the RTS signal may further include information such as an address of the source node A, an address of the destination node B, and the like. Further, the RTS signal may further include the number of nodes that the source node A requests to cooperate, and the number of nodes that request the cooperation may make the destination node serve as a reference for selecting the number of nodes to request cooperation.
- FIG. 5 is another communication method according to an embodiment of the present invention.
- an execution entity is a destination node, and specifically includes the following steps:
- Step 510 The destination node receives the first data sent by the source node.
- the source node A, the destination node B, and the cooperative node C in the communication system are taken as an example for description.
- Source node A is ready to communicate with destination node B.
- the source node A sends the first data to the destination node B.
- the destination node B receives the first data.
- the first data is the data to be transmitted of the source node A.
- the source node A sends the first data to the destination node B. At the same time, the source node A also sends the first data to the coordinating node C.
- Step 520 The destination node performs decoding processing on the first data.
- the destination node B After receiving the first data, the destination node B performs decoding processing on the first data.
- the node decodes the data into the prior art and will not repeat it here.
- Step 530 When the destination node does not correctly decode the first data, the destination node sends a non-acknowledgment signal to the source node and the cooperation node.
- the destination node B generates a corresponding signal according to the result of the decoding process, and transmits the signal to the source node A and the cooperative node C.
- the destination node B when the destination node does not correctly decode the first data, the destination node B generates a non-acknowledgement signal and transmits a non-acknowledgement signal to the source node A and the coordination node C.
- the step of receiving the retransmission data sent by the source node A and the cooperation node C by the destination node B is further included.
- the cooperative node C and the source node A retransmit/forward data to the destination node B according to the received non-acknowledgment signal, and the transmission reliability is improved by the cooperative communication.
- the destination node B may receive the retransmission data sent by the cooperation node C or the source node A, and may also receive the retransmission data sent by the cooperation node C or the source node A at the same time.
- the destination node B receives the first data forwarded by the cooperative node C or the second data including the first data information that is encoded by the cooperative node C; or the destination node B receives the first data retransmitted by the source node A or The third data including the first data information is processed by the source node A; or the destination node B receives the first data forwarded by the cooperative node C or the second data including the first data information that is encoded by the cooperative node C. And the first data retransmitted by the source node A or the third data including the first data information that is encoded by the source node A.
- the cooperative node C After receiving the non-acknowledgment signal sent by the destination node B, the cooperative node C determines that the destination node B has received the first data, but does not correctly decode the first data, and the cooperative node C initiates the cooperative transmission mode according to the non-acknowledgment signal. And forwarding, to the destination node B, the second data including the first data information that is processed by the cooperation node C by the first data.
- the cooperative node C may perform different encoding processing on the first data before forwarding the retransmission data to the destination node, so that each forwarded data has different information on the basis of the first data information.
- the redundancy version further improves the communication quality; or, by re-transmitting the retransmission data of the cooperative node C and the retransmission data of the source node A, the communication quality can be improved.
- both the cooperative node C and the source node A can retransmit the same data, for example, the first data is retransmitted, so that the receiving process of the destination node B can be simplified.
- the source node A After receiving the non-acknowledgment signal, the source node A determines that the destination node B has received the first data, but does not correctly decode the first data, and the source node A initiates the retransmission mode according to the non-acknowledgment signal to the destination node B. Retransmitting the first data or the third data including the first data information that is encoded by the source node A.
- the source node A performs different encoding processing on the first data before retransmitting the data to the destination node B multiple times, so that each forwarded data has different redundancy on the basis of the first data information.
- the version improves the communication quality; or, by re-transmitting the retransmission data of the source node A and the retransmission data of the cooperation node C, the communication quality is improved.
- both the source node A and the cooperative node C can retransmit the same data, for example, retransmit the first data, which can simplify the receiving process of the destination node B.
- the destination node B may further transmit a non-acknowledgement signal, thereby requesting the source node A and the coordinating node C to retransmit the retransmission again. data.
- the source node A and the cooperative node C may send the retransmission data to the destination node multiple times until the predetermined maximum number of retransmissions. Each time the retransmitted data is sent, both the source node A and the coordinating node C can send the same retransmission data, and can also transmit different retransmission data, and the retransmission data sent each time can also be different from each other or the same.
- the cooperative node when the source node retransmits data to the destination node, the cooperative node also forwards data to the destination node, and the source node and the cooperative node transmit data to the destination node through multiple channels, thereby improving the reliability of the communication system.
- the second communication link is used between the destination node B and the cooperative node C.
- the second communication link and the third communication link are in different working frequency bands.
- the communication link in the embodiment of the present invention is a general term for interactive communication between nodes.
- Each node can use multiple communication links for communication when performing specific communication.
- the cooperative node C receives the communication link in which the source node A transmits the first data
- the communication link in which the cooperative node C forwards the data to the destination node B
- the coordinated node C receives the acknowledgement signal and/or the non-acknowledgement signal from the destination node B.
- Communication links are collectively referred to as a first communication link.
- the communication between the source node A, the destination node B, and the cooperative node C may adopt different channels, such as different communication frequency bands, to improve communication reliability.
- the communication link between the source node A and the destination node B and the cooperative node C adopts an unlicensed frequency band
- the communication link between the cooperative node C and the destination node B adopts a licensed frequency band
- the licensed frequency band has Higher transmission reliability than unlicensed bands, which reduces the number of retransmissions, improves communication reliability, and reduces communication delay.
- the cooperative node C after receiving the non-acknowledgment signal fed back by the destination node B, the cooperative node C forwards the first data or the second data to the destination node B; the source node A goes to the destination node B. Retransmit the first data or the third data.
- the foregoing cooperative node C forwards the first data or the second data, and the source node A retransmits the first data or the third data may be performed at the same frequency. For example, at time T1, the source node A and the cooperative node C are in the first frequency band. Retransmitting and forwarding the first data, the second data, and the third data to the destination node B.
- the foregoing cooperative node C forwards the first data or the second data, and the source node A retransmits the first data or the third data may be performed at a non-simultaneous non-synchronous frequency.
- the cooperative node C moves to the destination in the first frequency band.
- the Node B forwards the first data or the second data.
- the source node A forwards the first data and the like to the destination node B in the second frequency band.
- the destination node starts decoding after receiving the first data sent by the source node, and sends an acknowledgment signal or a non-acknowledgement signal to the cooperation node and the source node according to the decoding result.
- the cooperation node and the source node stop sending the first data to the destination node or according to the received non-acknowledgment signal. Encode the processed data.
- the source node and the cooperative node stop transmitting/forwarding data to the destination node according to the signal sent by the destination node, thereby saving communication system resources and avoiding resource waste.
- the step of sending the acknowledgement signal to the source node and the cooperation node by the destination node is further included.
- the cooperative node initiates the cooperative transmission mode according to the received acknowledgment signal, and retransmits/transmits the data to the destination node, thereby avoiding waste of communication system resources and reducing data transmission delay.
- the destination node B when the destination node B correctly decodes the first data, the destination node B generates an acknowledgment signal and transmits an acknowledgment signal to the source node A and the cooperative node C. After receiving the acknowledgment signal, the cooperative node C determines that the destination node B has received the first data, and correctly decodes the first data, and the cooperative node C stops forwarding the first data to the destination node B or performs coding through the cooperative node C.
- the processed second data containing the first data information.
- the source node A After receiving the acknowledgment signal sent by the destination node B, the source node A determines that the destination node B has received the first data, and correctly decodes the first data, and the source node A stops retransmitting to the destination node B according to the acknowledgment signal.
- a data or third data containing the first data information that is encoded by the source node A.
- the method further includes the step that the destination node receives the notification signal sent by the cooperation node.
- the cooperative node that correctly decodes the first data can continue to participate as a cooperative node in the cooperative communication, thereby avoiding waste of communication system resources.
- the cooperative node C after receiving the first data, performs decoding processing on the first data.
- the cooperative node C confirms that it cannot implement the function as the cooperative node, and generates the first notification signal.
- the cooperative node C sends a first notification signal to the destination node B, and according to the first notification signal, the destination node B confirms that the cooperative node C is no longer a cooperative node, and thus does not send an acknowledgment signal or a non-acknowledgement signal to the cooperative node C;
- the cooperative node C confirms that it can implement the function as a cooperative node, and generates a second notification signal.
- the cooperative node C sends a second notification signal to the destination node B, according to the second notification
- the source node A confirms that the cooperative node C is still acting as a cooperative node, and continues to transmit an acknowledgment signal or a non-acknowledgement signal to the cooperative node C.
- only the cooperative node that successfully receives the first data sent by the source node can perform the forwarding operation of the first data after receiving the non-acknowledgment signal sent by the destination node. If the collaboration node does not successfully receive the first data sent by the source node, the collaboration node does not participate in the current collaborative communication.
- step 510 of the embodiment of the present invention the step of selecting the collaboration node by the source node and the destination node is further included.
- the selected cooperative node can be involved in the cooperative communication, and the reliability of data transmission is improved.
- the source node A sends an RTS signal to the destination node B and the first node.
- the RTS signal includes first cooperation request information.
- the destination node B obtains the first cooperation request information from the RTS signal.
- the destination node B determines, according to the first cooperation request information, that the source node A has initiated the cooperation request mode, that is, the source node A requests other nodes to perform cooperative communication.
- the destination node B generates a Clear To Send (CTS) signal according to the RTS signal.
- the CTS signal includes second cooperation request information.
- the destination node B may directly initiate the collaboration request mode to generate the second collaboration request information.
- the RTS signal further includes a first time when the source node A sends the RTS signal.
- the CTS signal sent by the destination node B further includes a first pre-request of the third data including the first data information that is retransmitted by the source node A or encoded by the source node A.
- Retention time, a second reservation time of the second data including the first data information, and a destination node B where the node as the cooperation node in the first node forwards the first data or performs the coding process through the node as the cooperation node in the first node A third reserved time for transmitting a non-acknowledgment signal or an acknowledgement signal multiple times.
- the destination node B reserves communication time for subsequent communication with the source node A and the cooperative node C.
- the first reserved time in the embodiment of the present invention is the time when the source node A reserved by the destination node B retransmits the first data or the third data including the first data information that is encoded by the source node A.
- the source node A receives the non-acknowledgment signal sent by the destination node, the source node initiates a retransmission mode.
- the source node A retransmits the first data to the destination node B or performs encoding processing through the source node A.
- the third data including the first data information.
- the first reserved time is further used to enable the source node A and the first node that receives the RTS signal to clarify the time when the source node A retransmits the first data or the third data including the first data information that is encoded by the source node A. .
- the source node A when the source node A receives the non-acknowledgment signal sent by the destination node B, the source node A confirms that the destination node B does not correctly decode the first data, and the source node A initiates the retransmission mode to the destination node B. Retransmitting the first data or the third data including the first data information that is encoded by the source node A. When the source node A has retransmitted the first data to the destination node B or the third data including the first data information that is encoded by the source node A, and has not reached the first reservation time.
- the source node A may send a resource release signal to the node as the cooperation node in the first node, where the resource release signal is used to notify the node that the communication resource between the source node A and the destination node B can be released, thereby improving communication.
- System resource utilization is used to notify the node that the communication resource between the source node A and the destination node B can be released.
- the second reserved time in the embodiment of the present invention is that the node that is the cooperative node in the first node reserved by the destination node B forwards the first data or the first data that is encoded by the node that is the cooperative node in the first node.
- the time of the second data of the message When the first node acts as a collaboration node
- the node receives the non-acknowledgment signal sent by the destination node B, the node acting as the cooperation node initiates the cooperative transmission mode, and forwards the first data to the destination node B or passes through the first node as the cooperation node in the second reservation time.
- the second data of the first data information processed by the node is that the cooperative node in the first node reserved by the destination node B forwards the first data or the first data that is encoded by the node that is the cooperative node in the first node.
- the time of the second data of the message When the first node acts as a collaboration node
- the node receives the non-acknowled
- the foregoing first reservation time and the second reservation time may be the same reservation time, or may be different reservation times, and may be configured according to actual conditions.
- the CTS signal further includes a third reserved time that the destination node B sends the non-acknowledgment signal or the acknowledgement signal multiple times. Since the destination node B cannot successfully decode the first data once, the destination node B needs to decode the first data multiple times. Therefore, the destination node B may send multiple times before the transmitted CTS signal. The time for confirming the signal or confirming the signal is reserved.
- the destination node B When the destination node B correctly decodes the first data, in the third reserved time, the destination node B sends an acknowledgement signal to the source node A and the cooperation node (the cooperation node is a node as a cooperation node in the first node); When the destination node B does not correctly decode the first data, the destination node B sends a non-acknowledgment signal to the source node A and the cooperation node during the third reserved time.
- the destination node B has decoded the first data and sends a signal to the source node A and the cooperation node. After the destination node B has sent the corresponding signal to the source node A and the cooperation node, and the third reservation time has not been reached, the destination node B may send a resource release signal to the cooperation node, where the resource release signal is used to notify the cooperation node that the The communication resources between the source node A and the destination node B are released, thereby improving the resource utilization of the communication system.
- FIG. 6 is another communication method according to an embodiment of the present invention.
- an execution entity is a first node, and specifically includes the following steps:
- Step 610 The first node determines whether the request to send the RTS signal sent by the source node and the permission to send the CTS signal sent by the destination node are received.
- the source system A, the destination node B, and the at least one first node in the communication system are taken as an example for description.
- the source node A sends an RTS signal to the first node, and the destination node B sends a CTS letter to the first node. number.
- the first node determines whether it receives the RTS signal and the CTS signal.
- Step 620 If the first node receives the RTS signal sent by the source node, and receives the CTS signal sent by the destination node, the first node determines that the first node is a candidate collaboration node.
- the first node determines that it is a candidate cooperative node.
- the first node if the first node only receives the RTS signal or only receives the CTS signal, the first node cannot become a candidate cooperative node, and thus cannot become a cooperative node.
- the embodiment of the present invention further includes the step of the first node identifying the RTS signal and various types of information included in the CTS signal.
- the first node can be made a candidate cooperative node, and further determine whether it can become a cooperative node, thereby participating in cooperative communication, and improving the reliability of the communication system.
- the first node identifies whether the RTS signal and the CTS signal include cooperation request information, and by identifying the cooperation request information, the first node determines whether it can become a cooperative node.
- the first node determines that it is a candidate cooperative node.
- the first node identifies whether the first cooperation request information is included in the RTS signal, and whether the second cooperation request information is included in the CTS signal.
- the first node that is the candidate cooperation node determines that it is the cooperation node.
- the first node obtains the channel quality value between itself and the source node A, and the channel quality value between the self and the destination node B. Can become a collaboration node.
- the first node acquires a first channel quality value between itself and the source node A and a second channel quality value between itself and the destination node B.
- the first node is connected according to the Receiving the RTS signal, measuring the first channel quality value between itself and the source node A; the first node measures the second channel quality value between itself and the destination node B according to the received CTS signal.
- the first node determines whether the first channel quality value exceeds a first quality threshold, and whether the second channel quality value exceeds a second quality threshold. If the first channel quality value exceeds the first quality threshold and the second channel quality value exceeds the second quality threshold, the first node that is the candidate cooperative node determines that the first node is a cooperative node.
- the first node determines that it is a candidate cooperative node.
- the first node identifies whether the CTS signal includes a third channel quality value between the destination node B and the source node A.
- the first node determines whether the first channel quality value exceeds a third channel quality threshold, and whether the third quality value exceeds a fourth channel quality threshold. If the first channel quality value exceeds the third quality threshold and the third channel quality value exceeds the fourth quality threshold, the first node that is the candidate cooperative node determines that the first node is a cooperative node.
- the first quality threshold and the third quality threshold may be the same or different thresholds.
- the first node acquires a time when the node sends the corresponding signal from the RTS signal and the CTS signal, and according to the acquired time, the first node determines whether it can become a cooperative node.
- the CTS signal when the RTS signal includes the first time when the source node A transmits the RTS signal, the CTS signal includes a first path delay between the destination node B and the source node A, and the first node receives the first time from the RTS signal. .
- the first path delay between the destination node B and the source node A is obtained from the CTS signal.
- the first node records the second time when the RTS signal is received. According to the first time and the second time, the first node determines a second path delay between the first node and the source node A. The first node determines, according to the first path delay and the second path delay, whether the difference between the first path delay and the second path delay does not exceed a delay threshold. If the difference between the first path delay and the second path delay does not exceed the delay threshold, the first node that is the candidate cooperative node determines that the first node is a cooperative node.
- the first node acquires the third time from the CTS signal and The first path delay.
- the first node records the fourth time when the CTS signal is received. According to the third time and the fourth time, the first node determines a third path delay between the first node and the destination node B. The first node determines, according to the first path delay and the third path delay, whether the difference between the first path delay and the third path delay does not exceed a delay threshold. If the difference between the first path delay and the third path delay does not exceed the delay threshold, the first node that is the candidate cooperative node determines that the first node is a cooperative node.
- the first node acquires, from the CTS signal, the number of nodes that the destination node requests to cooperate, and according to the number of nodes that the request cooperates, the first node determines whether it can become a cooperative node.
- the first node acquires the number m of the nodes requesting cooperation from the CTS signal, and acquires topology information of the network between the source node and the destination node. .
- the topology information has been previously stored in the first node.
- the topology information includes the location, connection relationship, and so on of each node in the network.
- the first node determines the number M of candidate cooperative nodes.
- the first node may determine the number of candidate cooperative nodes in the topology information, the location and connection relationship between the source node A, the destination node B, and other nodes.
- the first node Based on the number M of candidate cooperating nodes, the first node generates a node random number within the set of candidate cooperating nodes.
- the candidate cooperative node set is [1, M].
- the node random number is any integer of [1, M].
- the first node compares the node random number with the number m of nodes requesting cooperation. If the node random number is not greater than the number m of nodes requesting cooperation, the first node as the candidate cooperation node determines that the first node is a cooperative node.
- the node random number generated by the first node is 6.
- the first node determines that the node random number is not greater than the number m of nodes requesting cooperation, and the first node acts as a candidate cooperative node. Set itself as a collaboration node.
- the first node may also send a notification signal to the source node and the destination node respectively.
- the notification signal is used to make the source node and the destination node clarify which nodes are the cooperative nodes, and when the cooperative communication is subsequently performed, the source node sends the first data to the cooperation node, and the destination node sends an acknowledgement signal or a non-acknowledgement signal to the cooperation node.
- the coordinated node may be configured in advance by the technician, and the configured cooperative node is in the source node and the destination node. Configure it.
- the first node determines whether it can become a cooperative node according to the RTS signal sent by the source node and the CTS signal sent by the destination node, and the related information included in the RTS signal and the CTS signal.
- it can become a cooperative node, it participates in the communication between the source node and the destination node.
- the transmission reliability improvement gain through cooperative communication is realized, and the problem of increased delay and waste of resources caused by multiple forwarding operations of the cooperative node is avoided.
- FIG. 7 is a sequence diagram of a communication method according to an embodiment of the present invention. Specifically, the following steps are included:
- Step 710 The source node sends the first data to the destination node and the collaboration node.
- the source node A, the destination node B, and the cooperative node C in the communication system are taken as an example for description.
- Source node A is ready to communicate with destination node B.
- the source node A transmits the first data to the destination node B and the cooperation node C.
- the first data is data to be transmitted of the source node A.
- Step 720 The destination node performs decoding processing on the first data.
- the destination node B After receiving the first data, the destination node B performs decoding processing on the first data.
- the node decodes the data into the prior art and will not repeat it here.
- Step 730 When the destination node does not correctly decode the first data, the destination node sends a non-acknowledgment signal to the source node and the cooperation node.
- the destination node B generates a corresponding signal according to the result of the decoding process, and transmits the signal to the source node A and the cooperative node C.
- the destination node B When the destination node B does not correctly decode the first data, the destination node B generates a non-acknowledgement signal and transmits a non-acknowledgement signal to the cooperative node C.
- Step 740 The source node retransmits the first data or the third data including the first data that is encoded by the source node according to the non-acknowledgment signal.
- the source node A determines that the destination node B has received the first data, but does not correctly decode the first data, and the source node A starts the retransmission mode according to the non-acknowledgment signal.
- the destination node B retransmits the first data or the third data including the first data that is encoded by the source node A.
- Step 750 According to the non-acknowledgment signal, the cooperative node forwards the first data to the destination node or the second data including the first data that is encoded by the cooperation node.
- the cooperative node C determines that the destination node B has received the first data, but does not correctly decode the first data, and the cooperative node C initiates the cooperative transmission mode according to the non-acknowledgment signal.
- the destination node B forwards the first data or the second data including the first data that is encoded by the cooperative node C.
- Step 760 When the destination node correctly decodes the first data, the destination node sends an acknowledgement signal to the source node and the cooperation node.
- the destination node B when the destination node B correctly decodes the first data, the destination node B generates an acknowledgment signal and transmits a non-acknowledgment signal to the source node A and the cooperative node C.
- Step 770 The source node stops retransmitting the first data to the destination node or the third data including the first data that is encoded by the source node according to the acknowledgement signal.
- the source node A determines that the destination node B has received the first data, and correctly decodes the first data, and the source node A stops retransmitting the first data to the destination node B according to the acknowledgment signal.
- the data or the third data including the first data that is encoded by the source node A.
- Step 780 According to the confirmation signal, the cooperation node stops forwarding the first data to the destination node.
- the cooperative node C determines that the destination node B has received the first data, and correctly decodes the first data, and the cooperative node C stops forwarding the first data to the destination node B according to the acknowledgment signal. Or the second data including the first data that is encoded by the cooperative node C.
- FIG. 8 is a sequence diagram of another communication method according to an embodiment of the present invention. Specifically, the following steps are included:
- Step 801 The source node sends an RTS signal to the destination node and the first node.
- source node A generates an RTS signal.
- the RTS signal includes the first cooperation request information and a first time when the source node A sends the RTS signal.
- the source node A transmits an RTS signal to the destination node B and the first node.
- Step 802 The destination node sends a CTS signal to the source node and the first node.
- the destination node B transmits a CTS signal to the source node A and the first node.
- Step 803 A node that is a cooperative node in the first node sends a notification signal to the source node and the destination node.
- the foregoing embodiment has described in detail the specific implementation process of the first node determining whether it can become a cooperative node according to the RTS signal and the CTS signal, and is not repeated here.
- Step 804 The source node sends the first data to the destination node and the collaboration node.
- Step 805 The destination node performs decoding processing on the first data.
- Step 806 When the destination node does not correctly decode the first data, the destination node sends a non-acknowledgment signal to the source node and the cooperation node.
- Step 807 The source node retransmits the first data or the third data including the first data information that is encoded by the source node according to the non-acknowledgment signal.
- Step 808 The cooperative node forwards the first data to the destination node or the second data including the first data information that is encoded by the cooperation node according to the non-acknowledgment signal.
- Step 809 When the destination node correctly decodes the first data, the destination node sends an acknowledgement signal to the source node and the cooperation node.
- Step 810 According to the acknowledgment signal, the source node stops retransmitting the first data to the destination node or the third data including the first data information that is encoded by the source node.
- Step 811 According to the confirmation signal, the cooperation node stops forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node.
- the embodiment of the present invention further provides a communication device for implementing the communication method provided in the foregoing embodiment.
- the device includes: The receiving unit 910 and the transmitting unit 920.
- the receiving unit 910 is configured to receive first data sent by the source node
- the receiving unit 910 is further configured to: when the destination node correctly decodes the first data, receive an acknowledgement signal sent by the destination node;
- the sending unit 920 is configured to stop, according to the acknowledgement signal, the second data that includes the first data information by forwarding the first data to the destination node or performing encoding processing by using the device.
- the receiving unit 910 is further configured to: when the destination node does not correctly decode the first data, receive a non-acknowledgment signal sent by the destination node;
- the sending unit 920 is further configured to: forward, according to the non-acknowledgment signal, the first data or the second data including the first data information that is encoded by the device to the destination node.
- the device communicates with the source node using a first communication link; the device communicates with the destination node using a second communication link;
- the first communication link and the second communication link are in different operating frequency bands.
- the destination node starts decoding after receiving the first data sent by the source node, and sends an acknowledgement signal or a non-acknowledgement signal to the device according to the decoding result.
- the device stops forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node according to the acknowledgement signal sent by the destination node.
- the embodiment of the present invention further provides another communication device for implementing the communication method provided in the foregoing embodiment.
- the device includes : a transmitting unit 1010 and a receiving unit 1020.
- the sending unit 1010 is configured to send first data to the destination node
- the receiving unit 1020 is configured to: when the destination node does not correctly decode the first data, receive a non-acknowledgment signal sent by the destination node;
- the sending unit 1010 is further configured to: retransmit the first data or the third data including the first data information that is encoded by the device according to the non-acknowledgment signal to the destination node.
- the receiving unit 1020 is further configured to: when the destination node correctly decodes the first data, receive an acknowledgement signal sent by the destination node;
- the sending unit 1010 is further configured to: stop, according to the acknowledgement signal, retransmitting the first data to the destination node or the third data including the first data information by performing coding processing by the device .
- the sending unit 1010 is further configured to send the first data to the cooperation node.
- the sending unit 1010 is further configured to send, to the destination node and the first node, a request to send an RTS signal, where the RTS signal includes first collaboration request information;
- the receiving unit 1020 is further configured to receive a CTS signal that is sent by the destination node according to the RTS signal, where the CTS signal includes second collaboration request information.
- the RTS signal sent by the sending unit 1010 further includes a first part of the third data including the first data information that is retransmitted by the sending unit by the sending unit or encoded by the apparatus.
- the sending unit 1010 is specifically configured to: retransmit the first data to the destination node or the encoding process including the first data information that is processed by the device during the first reserved time Third data.
- the RTS signal sent by the sending unit 1010 further includes: a node that is a cooperative node in the first node forwards the first data or performs a coding process by a node that is a cooperative node in the first node. a second reserved time of the second data including the first data information;
- the RTS signal sent by the sending unit 1010 further includes a third reserved time that the destination node sends the non-acknowledgment signal or the acknowledgement signal multiple times.
- the device communicates with the cooperative node using a first communication link; the device communicates with the destination node using a third communication link;
- the first communication link and the third communication link are in different operating frequency bands.
- the device sends the first data to the destination node.
- the destination node After receiving the first data, the destination node starts decoding, and sends an acknowledgment signal or a non-acknowledgement signal to the device according to the decoding result.
- the device When the destination node correctly decodes the first data, the device according to the destination node The acknowledgment signal sent, stopping the retransmission of the first data to the destination node or the third data including the first data information that is encoded by the source node. Due to the invention In an embodiment, the source node retransmits data to the destination node according to the signal sent by the destination node, which saves communication system resources and avoids resource waste.
- the embodiment of the present invention further provides another communication device for implementing the communication method provided in the foregoing embodiment.
- the device includes The receiving unit 1110, the decoding unit 1120, and the transmitting unit 1130.
- the receiving unit 1110 is configured to receive first data sent by the source node
- the decoding unit 1120 is configured to perform decoding processing on the first data.
- the sending unit 1130 is configured to send a non-acknowledgment signal to the source node and the cooperation node when the decoding unit does not correctly decode the first data.
- the receiving unit 1110 is further configured to receive the first data that is forwarded by the coordinated node or the second data that is encoded by the coordinated node and that includes the first data information;
- the third data including the first data information that is processed by the source node.
- the sending unit 1130 is further configured to: when the decoding unit correctly decodes the first data, send an acknowledgement signal to the source node and the cooperation node.
- the receiving unit 1110 is further configured to: receive a request sent by the source node to send an RTS signal, where the RTS signal includes first collaboration request information;
- the sending unit 1130 is further configured to send, according to the RTS signal, a CTS signal to the source node and the first node, where the CTS signal includes second cooperation request information.
- the RTS signal received by the receiving unit 1110 further includes the source node weight Transmitting the first data or the first reservation time of the third data including the first data information that is encoded by the source node, and the node serving as the cooperation node in the first node forwarding the first Data or a second reservation time of the second data including the first data information that is encoded by the node as the cooperation node in the first node;
- the CTS signal sent by the sending unit 1130 further includes a third reserved time that the sending unit sends the non-acknowledgment signal or the acknowledgement signal multiple times;
- the sending unit 1130 is specifically configured to send the non-acknowledgment signal or the acknowledgement signal to the source node and the cooperative node in the third reserved time.
- the device communicates with the cooperative node using a second communication link; the device communicates with the source node using a third communication link;
- the second communication link and the third communication link are in different operating frequency bands.
- the device starts decoding after receiving the first data sent by the source node, and sends an acknowledgement signal or non-confirmation to the cooperation node and the source node according to the decoding result.
- the signal when the device does not correctly decode the first data, the cooperating node and the source node stop transmitting the first data or the encoded data to the device according to the received non-acknowledgment signal.
- the source node and the cooperative node stop transmitting/forwarding data to the destination node according to the signal sent by the destination node, thereby saving communication system resources and avoiding resource waste.
- the embodiment of the present invention further provides another communication device for implementing the communication method provided in the foregoing embodiment.
- the device includes : a judging unit 1210 and a determining unit 1220.
- the determining unit 1210 is configured to determine whether the request to send the RTS signal sent by the source node and the permission to send the CTS signal sent by the destination node are received;
- a determining unit 1220 configured to: if the apparatus receives the RTS signal sent by the source node, And receiving the CTS signal sent by the destination node, determining that the device is a candidate cooperative node.
- the determining unit 1220 is further configured to: when the RTS signal includes the first cooperation request information, and the CTS signal includes the second cooperation request information, determine that the device is a collaboration node.
- the device further includes:
- An obtaining unit 1230 configured to acquire a first channel quality value between the device and the source node, and a second channel quality value between the device and the destination node;
- the determining unit 1210 is further configured to: determine whether the first channel quality value exceeds a first quality threshold, and whether the second channel quality value exceeds a second quality threshold;
- the determining unit 1220 is further configured to: if the first channel quality value exceeds the first quality threshold, and the second channel quality value exceeds the second quality threshold, determine that the device is a cooperative node;
- the determining unit 1210 is further configured to: when the CTS signal includes a third channel quality value between the destination node and the source node, the first node determines whether the first channel quality value exceeds Determining a third quality threshold, and whether the third quality value exceeds a fourth channel quality threshold;
- the determining unit 1220 is further configured to: if the first channel quality value exceeds the third quality threshold, and the third channel quality value exceeds the fourth quality threshold, determine that the device is a cooperative node;
- the determining unit 1220 is further configured to: when the CTS signal includes a first path between the destination node and the source node, determine a second path between the device and the destination node Delay
- the determining unit 1210 is further configured to: determine, according to the first path delay and the second path delay, whether a difference between the first path delay and the second path delay does not exceed a delay Threshold value
- the determining unit 1220 is further configured to: if the first path delay and the second path delay If the difference does not exceed the delay threshold, then the device is determined to be a cooperative node.
- the device determines whether it can become a cooperative node according to the RTS signal sent by the source node and the CTS signal sent by the destination node, and related information included in the RTS signal and the CTS signal.
- the device determines whether it can become a cooperative node according to the RTS signal sent by the source node and the CTS signal sent by the destination node, and related information included in the RTS signal and the CTS signal.
- it participates in the communication between the source node and the destination node.
- the transmission reliability improvement gain through cooperative communication is realized, and the problem of increased delay and waste of resources caused by multiple forwarding operations of the cooperative node is avoided.
- the communication device shown in FIG. 9 in the embodiment of the present invention may be disposed in a cooperative node, to implement the foregoing communication method in the embodiment of the present invention.
- the cooperative node includes: a receiver 1310, The processor 1320, the transmitter 1330, and the memory 1340.
- the receiver 1310, the processor 1320, the transmitter 1330, and the memory 1340 are connected to each other through a bus 1350;
- the bus 1350 may be a peripheral component interconnect standard (English: peripheral) interconnect or an extended industry standard structure (English: Extended industry standard architecture, referred to as: EISA) bus.
- the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 13, but it does not mean that there is only one bus or one type of bus.
- the processor 1320 may be a central processing unit (English: central processing unit, CPU for short), a network processor (English: network processor, NP for short) or a combination of a CPU and an NP.
- CPU central processing unit
- NP network processor
- the processor 1320 may further include a hardware chip.
- the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
- ASIC application-specific integrated circuit
- PLD programmable logic device
- the above PLD can be a complex programmable logic device (English: complex programmable logic device, referred to as: CPLD), field programmable logic gate array (English: field-programmable Gate array (abbreviation: FPGA), general array logic (English: general array logic, abbreviation: GAL) or any combination thereof.
- the memory 1340 may include a volatile memory (English: volatile memory), such as random-access memory (RAM: RAM); the memory may also include non-volatile memory (English: non-volatile memory) For example, flash memory (English: flash memory), hard disk (English: hard disk drive, HDD) or solid state drive (English: solid-state drive, SSD); the memory 1340 may also include the above types of memory. combination.
- volatile memory such as random-access memory (RAM: RAM
- flash memory English: flash memory
- hard disk English: hard disk drive, HDD
- SSD solid state drive
- the memory 1340 can also be used to store program instructions.
- the processor 1320 is a CPU
- the processor 1320 calls the program instructions stored in the memory 1340.
- the processor 1320 is an FPGA, an ASIC or the like
- the processor 1320 The memory 1340 is not required to store program instructions, and the technician can directly write the program instructions into the hardware processor of the FPGA or the ASIC, and the FPGA and the ASIC can directly execute the program instructions.
- the receiver 1310 is configured to receive first data sent by the source node.
- the receiver 1310 is further configured to: when the destination node correctly decodes the first data, receive an acknowledgement signal sent by the destination node;
- the transmitter 1330 is configured to stop forwarding, according to the acknowledgement signal, the first data that is forwarded to the destination node or the second data that includes the first data information by using the coordinated node.
- Processor 1320 performs the processes involved in the cooperative nodes of Figures 3-8 and/or other processes for the techniques described herein.
- the memory 1340 is for storing program code and data for the cooperation node to implement the aforementioned communication method.
- Figure 13 only shows a simplified design of the cooperative node.
- the cooperative node may include any number of transmitters, receivers, processors, controllers, memories, etc., and all of the cooperative nodes that can implement the present invention are within the scope of the present invention.
- the receiver 1310 is further configured to: when the destination node is not correct for the first data Receiving, when decoding, receiving a non-acknowledgment signal sent by the destination node;
- the transmitter 1330 is further configured to: forward, according to the non-acknowledgment signal, the first data or the second data including the first data information that is encoded by the cooperation node to the destination node. .
- the device communicates with the source node using a first communication link; the device communicates with the destination node using a second communication link;
- the first communication link and the second communication link are in different operating frequency bands.
- the destination node starts decoding after receiving the first data sent by the source node, and sends an acknowledgement signal or a non-acknowledgement signal to the device according to the decoding result.
- the device stops forwarding the first data to the destination node or the second data including the first data information that is encoded by the cooperation node according to the acknowledgement signal sent by the destination node.
- the communication device shown in FIG. 10 in the embodiment of the present invention may be disposed in a source node to implement the foregoing communication method in the embodiment of the present invention.
- the source node includes: a receiver 1410, The processor 1420, the transmitter 1430, and the memory 1440.
- the receiver 1410, the processor 1420, the transmitter 1430, and the memory 1440 are connected to each other through a bus 1450; the bus 1450 is the same as the bus in the foregoing embodiment, and will not be described again herein.
- the processor 1420 and the memory 1440 are also the same as the processor and the memory in the foregoing embodiment, and are not described again here.
- the transmitter 1430 is configured to send the first data to the destination node
- the receiver 1410 is configured to: when the destination node does not correctly decode the first data, receive a non-acknowledgment signal sent by the destination node;
- the transmitter 1430 is further configured to: according to the non-acknowledgment signal, the source node retransmits the first data to the destination node or the first data information that is encoded by the source node Third data.
- Processor 1420 performs the processes involved with the source node in Figures 3 through 8 and/or other processes for the techniques described herein.
- the memory 1440 is for storing program codes and data for the source node to implement the aforementioned communication method.
- Figure 14 only shows a simplified design of the source node.
- the source node may contain any number of transmitters, receivers, processors, controllers, memories, etc., and all source nodes that can implement the present invention are within the scope of the present invention.
- the receiver 1410 is further configured to: when the destination node correctly decodes the first data, receive an acknowledgement signal sent by the destination node;
- the transmitter 1430 is further configured to: stop, according to the acknowledgement signal, retransmission of the first data to the destination node or the third data including the first data information that is encoded by the source node data.
- the transmitter 1430 is further configured to send the first data to the cooperation node.
- the transmitter 1430 is further configured to send, to the destination node and the first node, a request to send an RTS signal, where the RTS signal includes first collaboration request information;
- the receiver 1410 is further configured to receive an allowable CTS signal sent by the destination node according to the RTS signal, where the CTS signal includes second collaboration request information.
- the RTS signal further includes a first reservation time of the third data including the first data information that is retransmitted by the source node or processed by the source node;
- the transmitter 1430 is specifically configured to retransmit the first data to the destination node or the first data information that is encoded by the source node during the first reserved time.
- the third data is described.
- the RTS signal further includes: the node that is a cooperative node in the first node forwards the first data or performs coding processing by a node that is a cooperative node in the first node, and includes the first data information Second reservation time of the second data;
- the RTS signal further includes that the destination node sends the non-acknowledgment signal multiple times or The third reserved time of the signal.
- the device communicates with the cooperative node using a first communication link; the device communicates with the destination node using a third communication link;
- the first communication link and the third communication link are in different operating frequency bands.
- the device sends the first data to the destination node.
- the destination node After receiving the first data, the destination node starts decoding, and sends an acknowledgment signal or a non-acknowledgement signal to the device according to the decoding result.
- the device When the destination node correctly decodes the first data, the device according to the destination node The acknowledgment signal sent, stopping the retransmission of the first data to the destination node or the third data including the first data information that is encoded by the source node.
- the source node retransmits data to the destination node according to the signal sent by the destination node, which saves communication system resources and avoids resource waste.
- the communication device shown in FIG. 11 in the embodiment of the present invention may be disposed in the destination node, to implement the foregoing communication method in the embodiment of the present invention.
- the destination node includes: a receiver 1510, The processor 1520, the transmitter 1530, and the memory 1540.
- the receiver 1510, the processor 1520, the transmitter 1530, and the memory 1540 are connected to each other through a bus 1550; the bus 1550 is the same as the bus in the foregoing embodiment, and will not be described again here.
- the processor 1520 and the memory 1540 are also the same as the processor and the memory in the foregoing embodiment, and are not described again here.
- the receiver 1510 is configured to receive first data sent by the source node
- the processor 1520 is configured to perform decoding processing on the first data.
- the transmitter 1530 is configured to send a non-acknowledgment signal to the source node and the cooperation node when the processor does not correctly decode the first data.
- Processor 1520 performs the processes involved in the destination node of Figures 3 through 8 and/or other processes for the techniques described herein.
- the memory 1540 is for storing program code and data for the destination node to implement the aforementioned communication method.
- Figure 15 only shows a simplified design of the destination node.
- the destination node may contain any number of transmitters, receivers, processors, controllers, memories, etc., and all of the nodes that can implement the present invention are within the scope of the present invention.
- the receiver 1510 is further configured to receive the first data that is forwarded by the collaboration node or the second data that includes the first data information that is encoded by the collaboration node;
- the third data including the first data information that is processed by the source node.
- the transmitter 1530 is further configured to: when the destination node correctly decodes the first data, send an acknowledgement signal to the source node and the cooperation node.
- the receiver 1510 is further configured to: receive a request to send an RTS signal sent by the source node, where the RTS signal includes first collaboration request information;
- the transmitter 1530 is further configured to send a CTS signal to the source node and the first node, where the CTS signal includes second collaboration request information.
- the CTS signal further includes a first reservation time, where the source node retransmits the first data or third data including the first data information that is encoded by the source node, a second reservation time of the second data including the first data information that is forwarded by the node that is the cooperative node in the first node or that is encoded by the node that is the cooperative node in the first node;
- the CTS signal further includes a third reserved time that the destination node sends the non-acknowledgment signal or the acknowledgement signal multiple times;
- the transmitter 1530 is specifically configured to: in the third reserved time, to the source node and The cooperative node transmits the non-acknowledgment signal or the acknowledgement signal.
- the device communicates with the cooperative node using a second communication link; the device communicates with the source node using a third communication link;
- the second communication link and the third communication link are in different operating frequency bands.
- the device starts decoding after receiving the first data sent by the source node, and sends an acknowledgement signal or non-confirmation to the cooperation node and the source node according to the decoding result.
- the signal when the device does not correctly decode the first data, the cooperating node and the source node stop transmitting the first data or the encoded data to the device according to the received non-acknowledgment signal.
- the source node and the cooperative node stop transmitting/forwarding data to the destination node according to the signal sent by the destination node, thereby saving communication system resources and avoiding resource waste.
- the communication device shown in FIG. 12 in the embodiment of the present invention may be disposed in the first node to implement the foregoing communication method in the embodiment of the present invention.
- the first node includes: a receiver. 1610.
- Processor 1620, transmitter 1630, and memory 1640 The receiver 1610, the processor 1620, the transmitter 1630, and the memory 1640 are connected to each other through a bus 1650; the bus 1650 is the same as the bus in the foregoing embodiment, and will not be described again here.
- the processor 1620 and the memory 1640 are also the same as the processor and the memory in the foregoing embodiment, and are not described again here.
- the processor 1620 is configured to determine whether the receiver receives the request to send the RTS signal sent by the source node and the CTS signal sent by the destination node.
- the receiver receives the RTS signal sent by the source node, and receives the CTS signal sent by the destination node, determining that the first node is a candidate cooperative node.
- Processor 1620 performs the processes involved in the first node of Figures 3-8 and/or other processes for the techniques described herein.
- the memory 1640 is configured to store program codes and data in which the first node implements the aforementioned communication method.
- Figure 16 only shows a simplified design of the first node.
- the first node may contain any number of transmitters, receivers, processors, controllers, memories, etc., and all of the first nodes in which the present invention may be implemented are within the scope of the present invention.
- the processor 1620 is further configured to: when the RTS signal includes the first collaboration request information, and the CTS signal includes the second collaboration request information, determine that the first node is a collaboration node.
- the processor 1620 is further configured to acquire a first channel quality value between the first node and the source node, and a second channel quality value between the first node and the destination node. ;
- first channel quality value exceeds the first quality threshold, and the second channel quality value exceeds the second quality threshold, determining that the first node is a collaboration node;
- the processor 1620 is further configured to: determine, when the CTS signal includes a third channel quality value between the destination node and the source node, whether the first channel quality value exceeds the third quality threshold And whether the third quality value exceeds a fourth channel quality threshold;
- the first channel quality value exceeds the third quality threshold, and the third channel quality value exceeds the fourth quality threshold, determining that the first node is a collaboration node;
- the first node is a cooperative node.
- the device is sent according to a source node.
- the transmission reliability improvement gain through cooperative communication is realized, and the problem of increased delay and waste of resources caused by multiple forwarding operations of the cooperative node is avoided.
- the steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both.
- the software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.
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Abstract
本申请涉及通信技术领域,尤其涉及通信系统中多节点之间协作通信技术。在一种通信方法中,协作节点接收源节点发送的第一数据;当目的节点对所述第一数据正确译码时,所述协作节点接所述目的节点发送的确认信号;根据所述确认信号,所述协作节点停止向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据。通过本申请提供的方案,节省了通信系统资源,避免了资源浪费,在提升通信系统效率的同时,也降低了通信系统的干扰。
Description
本发明涉及通信技术领域,尤其涉及多节点之间协作通信技术。
目前,远程医疗、远程工业控制、虚拟现实等技术对通信系统提出了新的需求。例如,要求通信系统能够在深度覆盖场景下,1ms内以1*10-5(误块率小于10-5)的可靠性,传输约300kb大小的数据包。也即是,要求通信系统数据的传输速率为300Mbps。但现有的通信系统,无法同时满足覆盖、时延、可靠性和峰值速率的要求。
为了提升数据传输的可靠性,目前,一般采用协作传输的方式进行数据传输。如图1所示。如果源节点A要传输数据至目的节点B,则源节点A以及目的节点B根据自身的拓扑信息,确定至少一个节点作为协作节点(在图1中,协作节点为节点C以及节点D)。在T1时刻,源节点A分别向协作节点C、D以及目的节点B发送数据。协作节点C、D对数据进行处理后,协作节点C、D在T2时刻将数据转发至目的节点B。
但是,上述现有的协作通信方式,存在如下缺陷:1)无论传输信道的质量如何,数据传输时延固定(即从源节点A点到目的节点B的传输时延统一为:T1+Tp+T2,其中,Tp处理时间为协作节点对数据进行处理的处理时间),浪费传输资源;2)不论源节点A是否成功地将数据传输至目的节点B,所有协作节点C、D均需在T2时刻,将数据转发至目的节点B。如果源节点A已成功将数据传输至目的节点B,则协作节点C、D仍会重复执行转发操作,增加了目的节点B、协作节点C、D的功耗,并且,协作节点多次的转发操作,占
用了通信系统资源,也增加了通信系统的干扰。
发明内容
本发明提供了一种通信方法与终端,实现了充分利用协作通信所带来的数据传输可靠提升的增益,并且,避免了不必要的协作节点的多次转发操作所带来的时延增加和资源浪费的问题。
一方面,本发明实施例提供了一种通信方法,所述方法包括:
协作节点接收源节点发送的第一数据;
当目的节点对所述第一数据正确译码时,所述协作节点接收所述目的节点发送的确认信号;
根据所述确认信号,所述协作节点停止向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据。
在一种可能的设计中,所述方法还包括:
当所述目的节点未对所述第一数据正确译码时,所述协作节点接收所述目的节点发送的非确认信号;
根据所述非确认信号,所述协作节点向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的所述第二数据。
在一种可能的设计中,所述协作节点与所述源节点之间使用第一通信链路进行通信;所述协作节点与所述目的节点之间使用第二通信链路进行通信;
所述第一通信链路与所述第二通信链路处于不同的工作频段。
另一方面,本发明实施例提供了一种通信方法,所述方法包括:
源节点向目的节点发送第一数据;
当所述目的节点未对所述第一数据正确译码时,所述源节点接收所述目的节点发送的非确认信号;
根据所述非确认信号,所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
在一种可能的设计中,所述方法还包括:
当所述目的节点对所述第一数据正确译码时,所述源节点接收所述目的节点发送的确认信号;
根据所述确认信号,所述源节点停止向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据。
在一种可能的设计中,所述当所述目的节点未对所述第一数据正确译码时,所述源节点接收所述目的节点发送的非确认信号之前,所述方法还包括:
所述源节点向协作节点发送第一数据。
在一种可能的设计中,所述源节点向目的节点发送第一数据之前,所述方法还包括:
所述源节点向所述目的节点和第一节点发送请求发送RTS信号,所述RTS信号包括第一协作请求信息;
所述源节点接收所述目的节点根据所述RTS信号发送的允许发送CTS信号,所述CTS信号包括第二协作请求信息。
在一种可能的设计中,所述RTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间;
所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据具体包括:
在所述第一预留时间内,所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据。
在一种可能的设计中,所述RTS信号还包括所述第一节点中作为协作节
点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述RTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间。
在一种可能的设计中,所述源节点与所述协作节点之间使用第一通信链路进行通信;所述源节点与所述目的节点之间使用第三通信链路进行通信;
所述第一通信链路与所述第三通信链路处于不同的工作频段。
另一方面,本发明实施例提供了一种通信方法,所述方法包括:
目的节点接收源节点发送的第一数据;
所述目的节点对所述第一数据进行译码处理;
当所述目的节点未对所述第一数据正确译码时,所述目的节点向所述源节点和协作节点发送非确认信号。
在一种可能的设计中,所述方法还包括:
所述目的节点接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据;
或者,
所述目的节点接收所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据;
或者,
所述目的节点接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据,和所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
在一种可能的设计中,所述方法还包括:
当所述目的节点对所述第一数据正确译码时,所述目的节点向所述源节点和所述协作节点发送确认信号。
在一种可能的设计中,所述目的节点接收源节点发送的第一数据之前,所述方法还包括:
所述目的节点接收所述源节点发送的请求发送RTS信号,所述RTS信号包括第一协作请求信息;
根据所述RTS信号,所述目的节点向所述源节点和第一节点发送允许发送CTS信号,所述CTS信号包括第二协作请求信息。
在一种可能的设计中,所述CTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间、所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述CTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间;
所述目的节点向所述源节点和协作节点发送非确认信号或者确认信号,具体包括:
在所述第三预留时间内,所述目的节点向所述源节点和所述协作节点发送所述非确认信号或者所述确认信号。
在一种可能的设计中,所述目的节点与所述协作节点之间使用第二通信链路进行通信;所述目的节点与所述源节点之间使用第三通信链路进行通信;
所述第二通信链路与所述第三通信链路处于不同的工作频段。
另一方面,本发明实施例提供了一种通信方法,所述方法包括:
第一节点判断是否接收到源节点发送的请求发送RTS信号以及目的节点发送的允许发送CTS信号;
如果所述第一节点接收到所述源节点发送的RTS信号,且接收到所述目的节点发送的CTS信号,则所述第一节点确定所述第一节点为候选协作节点。
在一种可能的设计中,所述方法还包括:
当所述RTS信号包括第一协作请求信息,且所述CTS信号包括第二协作请求信息时,作为所述候选协作节点的第一节点确定所述第一节点为协作节点。
在一种可能的设计中,所述方法还包括:
所述第一节点获取所述第一节点与所述源节点之间的第一信道质量值以及所述第一节点与所述目的节点之间的第二信道质量值;
所述第一节点判断所述第一信道质量值是否超过第一质量阈值,且所述第二信道质量值是否超过第二质量阈值;
如果所述第一信道质量值超过所述第一质量阈值,且所述第二信道质量值超过所述第二质量阈值,则作为所述候选协作节点的第一节点确定所述第一节点为协作节点;
或者,
当所述CTS信号包括所述目的节点与所述源节点之间的第三信道质量值时,所述第一节点判断所述第一信道质量值是否超过所述第三质量阈值,且所述第三质量值是否超过第四信道质量阈值;
如果所述第一信道质量值超过所述第三质量阈值,且所述第三信道质量值超过所述第四质量阈值,则作为所述候选协作节点的第一节点确定所述第一节点为协作节点;
或者,
当所述CTS信号包括所述目的节点与所述源节点之间的第一路径时延时,所述第一节点确定所述第一节点与所述目的节点之间的第二路径时延;
所述第一节点根据所述第一路径时延和所述第二路径时延,判断所述第一路径时延与所述第二路径时延的差值是否不超过时延阈值;
如果所述第一路径时延与所述第二路径时延的差值不超过所述时延阈值,则作为所述候选协作节点的第一节点确定所述第一节点为协作节点。
另一方面,本发明实施例提供了一种通信装置,所述装置包括:
接收单元,用于接收源节点发送的第一数据;
所述接收单元还用于,当目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;
发送单元,用于根据所述确认信号,停止向所述目的节点转发所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第二数据。
在一种可能的设计中,所述接收单元还用于,当所述目的节点未对所述第一数据正确译码时,接收所述目的节点发送的非确认信号;
所述发送单元还用于,根据所述非确认信号,向所述目的节点转发所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第二数据。
在一种可能的设计中,所述装置与所述源节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第二通信链路进行通信;
所述第一通信链路与所述第二通信链路处于不同的工作频段。
另一方面,本发明实施例提供了一种通信装置,所述装置包括:
发送单元,用于向目的节点发送第一数据;
接收单元,用于当所述目的节点未对所述第一数据正确译码时,接收所述目的节点发送的非确认信号;
所述发送单元还用于,根据所述非确认信号,向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第三数据。
在一种可能的设计中,所述接收单元还用于,当所述目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;
所述发送单元还用于,根据所述确认信号,停止向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第三数据。
在一种可能的设计中,所述发送单元还用于,向协作节点发送第一数据。
在一种可能的设计中,所述发送单元还用于,向所述目的节点和第一节点发送请求发送RTS信号,所述RTS信号包括第一协作请求信息;
所述接收节点还用于,接收所述目的节点根据所述RTS信号发送的允许发送CTS信号,所述CTS信号包括第二协作请求信息。
在一种可能的设计中,所述发送单元发送的所述RTS信号还包括所述发送单元重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第三数据的第一预留时间;
所述发送单元具体用于,在所述第一预留时间内,向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第三数据。
在一种可能的设计中,所述发送单元发送的所述RTS信号还包括所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述发送单元发送的所述RTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间。
在一种可能的设计中,所述装置与所述协作节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第三通信链路进行通信;
所述第一通信链路与所述第三通信链路处于不同的工作频段。
另一方面,本发明实施例提供了一种通信装置,所述装置包括:
接收单元,用于接收源节点发送的第一数据;
译码单元,用于对所述第一数据进行译码处理;
发送单元,用于当所述译码单元未对所述第一数据正确译码时,向所述源节点和协作节点发送非确认信号。在一种可能的设计中,所述发送单元还用于,当所述译码单元对所述第一数据正确译码时,向所述源节点和所述协作节点发送确认信号。
在一种可能的设计中,
所述接收单元还用于,接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据;
或者,
接收所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据;
或者,
接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据,和所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
在一种可能的设计中,所述接收单元还用于,接收所述源节点发送的请求发送RTS信号,所述RTS信号包括第一协作请求信息;
所述发送单元还用于,根据所述RTS信号,向所述源节点和第一节点发送允许发送CTS信号,所述CTS信号包括第二协作请求信息。
在一种可能的设计中,所述接收单元接收的所述RTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间、所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述发送单元发送的所述CTS信号还包括所述发送单元多次发送所述非确认信号或者所述确认信号的第三预留时间;
所述发送单元具体用于,在所述第三预留时间内,向所述源节点和所述协作节点发送所述非确认信号或者所述确认信号。
在一种可能的设计中,所述装置与所述协作节点之间使用第二通信链路进行通信;所述装置与所述源节点之间使用第三通信链路进行通信;
所述第二通信链路与所述第三通信链路处于不同的工作频段。
另一方面,本发明实施例提供了一种通信装置,所述装置包括:
判断单元,用于判断是否接收到源节点发送的请求发送RTS信号以及目的节点发送的允许发送CTS信号;
确定单元,用于如果所述第一节点接收到所述源节点发送的RTS信号,且接收到所述目的节点发送的CTS信号,则确定所述装置为候选协作节点。
在一种可能的设计中,所述确定单元还用于,当所述RTS信号包括第一协作请求信息,且所述CTS信号包括第二协作请求信息时,确定所述装置为协作节点。
在一种可能的设计中,所述装置还包括:
获取单元,用于获取所述装置与所述源节点之间的第一信道质量值以及所述装置与所述目的节点之间的第二信道质量值;
所述判断单元还用于,判断所述第一信道质量值是否超过第一质量阈值,且所述第二信道质量值是否超过第二质量阈值;
所述确定单元还用于,如果所述第一信道质量值超过所述第一质量阈值,且所述第二信道质量值超过所述第二质量阈值,则确定所述装置为协作节点;
或者,
所述判断单元还用于,当所述CTS信号包括所述目的节点与所述源节点之间的第三信道质量值时,所述第一节点判断所述第一信道质量值是否超过所述第三质量阈值,且所述第三质量值是否超过第四信道质量阈值;
所述确定单元还用于,如果所述第一信道质量值超过所述第三质量阈值,且所述第三信道质量值超过所述第四质量阈值,则确定所述装置为协作节点;
或者,
所述确定单元还用于,当所述CTS信号包括所述目的节点与所述源节点之间的第一路径时延时,确定所述装置与所述目的节点之间的第二路径时延;
所述判断单元还用于,根据所述第一路径时延和所述第二路径时延,判断所述第一路径时延与所述第二路径时延的差值是否不超过时延阈值;
所述确定单元还用于,如果所述第一路径时延与所述第二路径时延的差值不超过所述时延阈值,则确定所述装置为协作节点。
又一方面,本发明实施例提供了一种协作节点,该协作节点具有实现上述方法实际中协作节点行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
又一方面,本发明实施例提供了一种源节点,该源节点具有实现上述方法实际中源节点行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
又一方面,本发明实施例提供了一种目的节点,该目的节点具有实现上述方法实际中目的节点行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
又一方面,本发明实施例提供了一种第一节点,该第一节点具有实现上述方法实际中第一节点行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
相较于现有技术,本发明实施例提供的方案源节点或协作节点根据目的节点发送的信号确定是否重传或转发数据。在不需要重传或转发数据时,源节点或协作节点可释放与目的节点之间的通信资源,从而节省了通信系统资源,避免了资源浪费,在提升通信系统效率的同时,也降低了通信系统的干扰。
图1为现有技术中协作传输示意图;
图2为本发明实施例提供的通信系统示意图;
图3为本发明实施例提供的一种通信方法流程图;
图4为本发明实施例提供的另一种通信方法流程图;
图5为本发明实施例提供的另一种通信方法流程图;
图6为本发明实施例提供的另一种通信方法流程图;
图7为本发明实施例提供的一种通信方法的时序图;
图8为本发明实施例提供的另一种通信方法的时序图;
图9为本发明实施例提供的一种通信装置结构示意图;
图10为本发明实施例提供的另一种通信装置结构示意图;
图11为本发明实施例提供的另一种通信装置结构示意图;
图12为本发明实施例提供的另一种通信装置结构示意图;
图13为本发明实施例提供的协作节点的硬件结构示意图;
图14为本发明实施例提供的源节点的硬件结构示意图;
图15为本发明实施例提供的目的节点的硬件结构示意图;
图16为本发明实施例提供的第一节点的硬件结构示意图。
下面将结合附图,对本发明实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有付出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明实施例描述的网络架构以及业务场景是为了更加清楚的说明本发明实施例的技术方案,并不构成对于本发明实施例提供的技术方案的限定,本领域普通技术人员可知,随着网络架构的演变和新业务场景的出现,本发明实施例提供的技术方案对于类似的技术问题,同样适用。
如图2所示,本发明实施例适用的通信系统包括源节点、目的节点、至
少一个协作节点。源节点、目的节点以及协作节点之间进行数据传输。各节点之间的数据传输,可通过无线电波进行传输,也可通过可见光、激光、电力线、光纤、同轴电缆、铜绞线、光子、量子等进行传输。
在本发明实施例中,源节点、目的节点、协作节点可具体为任意通信节点。例如,用户设备、或用户终端、或MS、或基站、或接入点等。
本发明描述的技术可以适用于长期演进(英文:Long Term Evolution,简称:LTE)系统,或其他采用各种无线接入技术的无线通信系统,例如采用码分多址,频分多址,时分多址,正交频分多址,单载波频分多址等接入技术的系统。此外,还可以适用于使用LTE系统后续的演进系统,如第五代5G系统等。为清楚起见,这里仅以LTE系统为例进行说明。在LTE系统中,演进的UMTS陆面无线接入(英文:Evolved Universal Terrestrial Radio Access Network,简称:E-UTRAN)作为无线接入网,演进分组核心网(英文:Evolved Packet,Core,简称:EPC)作为核心网。
下面将基于上面所述的本发明设计的共性方面,对本发明实施例进一步详细说明。
本发明的一个实施例提供一种通信方法,和基于这个方法的源节点、目的节点及协作节点。源节点向目的节点和协作节点发送第一数据,其中,协作节点可以为一个或者多个。目的节点对接收到的第一数据进行译码,并根据译码结果,生成确认信号(ACK)或者非确认信号(NACK)。如果正确译码,则生成确认信号,如果不能够正确译码,则生成非确认信号。目的节点向源节点和协作节点发送确认信号或者非确认信号。
当源节点和协作节点接收到确认信号时,协作节点停止向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。源节点也停止向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据信息的所述第三数据。
当源节点和协作节点接收到非确认信号时,协作节点向目的节点转发第
一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。源节点也可以向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。目的节点接收相应的重传数据,包括,目的节点接收源节点重传的第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据;或者目的节点接收协作节点转发的第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据;或者,目的节点接收源节点重传的所述第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据,和协作节点转发的第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。
如果目的节点在接收到源节点和协作节点的重传数据后,还不能够正确译码,则还可以进一步发送非确认信号,从而请求源节点和协作节点再次发送重传数据。源节点和协作节点可以多次向目的节点发送重传数据,直到达到预定的最大重传次数。每次发送的重传数据,源节点和协作节点都可以发送相同的重传数据,也可以发送不同的重传数据,每次发送的重传数据,也可以互不相同,或者相同。
在本发明实施例中,通过将ARQ机制应用在协作通信中,目的节点在接收到首个第一数据后进行译码,并根据译码结果,向源节点和协作节点发送反馈信号,源节点和协作节点根据接收的反馈信号,向目的节点再次发送第一数据或者经过源、协作节点进行编码处理的包含第一数据信息的重传数据。本发明实施例提供的通信方法不再像现有协作通信中,目的节点在接收到源节点发送的数据后,仍等待协作节点转发的数据,从而降低了数据传输时延。在本发明实施例中,源节点或协作节点根据目的节点发送的信号确定是否重传或转发数据。在不需要重传或转发数据时,源节点或协作节点可释放与目的节点之间的通信资源,从而节省了通信系统资源,避免了资源浪费,在提升通信系统效率的同时,也降低了通信系统的干扰。
进一步地,协作节点与源节点之间使用第一通信链路进行通信;协作节
点与目的节点之间使用第二通信链路进行通信;源节点与目的节点之间使用第三通信链路进行通信。第一通信链路、第二通信链路、第三通信链路处于不同的工作频段。
可以理解的是,本发明实施例中的通信链路是各节点之间进行交互通信的统称。各节点在进行具体通信时,可采用多条通信链路进行通信。例如,协作节点接收源节点发送第一数据的通信链路、协作节点向目的节点转发传数据的通信链路、协作节点接收目的节点发送确认信号和/或非确认信号的通信链路均统称为第一通信链路。
在本发明实施中,源节点、目的节点、协作节点之间的通信,可以采用不同的通道,例如不同的通信频段,提升通信可靠性。例如,源节点与目的节点和协作节点之间的通信链路采用非授权频段,协作节点与目的节点之间的通信链路采用授权频段,则在协作传输时,授权频段具有比非授权频段更高的传输可靠性,从而可以减少重传的次数,提升通信可靠性的同时降低通信时延。
下面结合附图3,对本发明的实施例提供的方案进行说明。图3为本发明实施例提供的一种通信方法,在所述方法中,执行主体为协作节点,具体包括以下步骤:
步骤310、协作节点接收源节点发送的第一数据。
具体地,在本发明实施例中,以通信系统中包括源节点A、目的节点B、协作节点C为例进行说明。
源节点A准备与目的节点B进行数据通信。源节点A向协作节点C发送第一数据。第一数据为源节点A的待传输数据。
进一步地,在本发明实施例中,源节点A在向协作节点C发送第一数据的同时,源节点A也向目的节点B发送第一数据。
步骤320、当目的节点对所述第一数据正确译码时,所述协作节点接收所述目的节点发送的确认信号。
具体地,目的节点B接收到第一数据后,对第一数据进行译码处理。节点对数据进行译码处理为现有技术,在此不再复述。目的节点B根据译码处理的结果生成对应的信号,并向协作节点C发送该信号。
当目的节点B对第一数据正确译码时,目的节点B生成确认信号,并向协作节点C发送确认信号。
进一步地,在本发明实施例中,目的节点B在向协作节点C发送确认信号的同时,目的节点B也向源节点A发送确认信号。
步骤330、根据所述确认信号,所述协作节点停止向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据。
具体地,协作节点C接收到确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,协作节点C根据确认信号,停止向目的节点B转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。
进一步地,源节点A接收到确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,源节点A根据确认信号,停止向目的节点B重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。
因此,通过应用本发明实施例提供的通信方法,目的节点在接收到源节点发送的第一数据后就开始译码,并根据译码结果,向协作节点发送确认信号或者非确认信号。当目的节点对第一数据正确译码时,协作节点根据目的节点发送的确认信号,停止向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。从而避免了因协作节点的转发操作所带来的时延增加和资源浪费的问题。
可选地,在本发明实施例还包括协作节点接收目的节点发送的非确认信号的步骤。通过该步骤,协作节点根据接收的非确认信号,启动协作传输模
式,向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据,通过协作通信提升了传输可靠性。
具体地,当目的节点B未对第一数据正确译码时,目的节点B生成非确认信号,并向协作节点C发送非确认信号。协作节点C接收到非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,协作节点C根据非确认信号,启动协作传输模式。
协作节点C在向目的节点多次转发数据前,对第一数据进行不同的编码处理,以使每次转发的数据在包含第一数据信息的基础上,具有不同的冗余版本,进而提高通信质量;或者,通过使协作节点C的重传数据与源节点A的重传数据能够协作译码,进而提升通信质量。当然,协作节点C和源节点A均可以重传相同的数据,例如,均重传第一数据,这样则可以简化目的节点B的接收处理。
在本发明实施例中,协作节点C向目的节点B转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。
进一步地,在本发明实施例中,目的节点B在向协作节点C分别发送非确认信号的同时,目的节点B也向源节点A发送非确认信号。源节点A接收到非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,源节点A根据非确认信号,启动重传模式。
源节点A在向目的节点多次转发数据前,对第一数据进行不同的编码处理,以使每次转发的数据在包含第一数据信息的基础上,具有不同的冗余版本,进而提高通信质量;或者,通过使源节点A的重传数据与协作节点C的重传数据能够协作译码,进而提升通信质量。当然,源节点A和协作节点C均可以重传相同的数据,例如,均重传第一数据,这样则可以简化目的节点B的接收处理。
在本发明实施例中,源节点A向目的节点B重传第一数据。
目的节点B可分别接收协作节点C、或者源节点A发送的重传数据,也可
在同一时刻接收协作节点C、或者源节点A发送的重传数据。
可以理解的是,由于在源节点向目的节点重传第一数据时,存在协作节点也向目的节点转发数据,源节点、协作节点通过多通道向目的节点传输数据,提高了通信系统的可靠性。
在本发明实施例中,协作节点C与源节点A之间使用第一通信链路进行通信;协作节点C与目的节点B之间使用第二通信链路进行通信。第一通信链路、第二通信链路处于不同的工作频段。
可以理解的是,本发明实施例中的通信链路是各节点之间进行交互通信的统称。各节点在进行具体通信时,可采用多条通信链路进行通信。例如,协作节点C接收源节点A发送第一数据的通信链路、协作节点C向目的节点B转发传数据的通信链路、协作节点C接收目的节点B发送确认信号和/或非确认信号的通信链路均统称为第一通信链路。
在本发明实施中,源节点A、目的节点B、协作节点C之间的通信,可以采用不同的通道,例如不同的通信频段,提升通信可靠性。例如,源节点A与目的节点B和协作节点C之间的通信链路采用非授权频段,协作节点C与目的节点B之间的通信链路采用授权频段,则在协作传输时,授权频段具有比非授权频段更高的传输可靠性,从而可以减少重传的次数,提升通信可靠性的同时降低通信时延。
在本发明实施例中,协作节点C和源节点A在接收到目的节点B反馈的非确认信号后,协作节点C向目的节点B转发第一数据或者第二数据;源节点A向目的节点B重传第一数据或者第三数据。前述协作节点C转发第一数据或者第二数据、源节点A重传第一数据或者第三数据可在同时同频下进行,例如,在T1时刻,源节点A、协作节点C在第一频段向目的节点B重传、转发第一数据、第二数据、第三数据。当然,前述协作节点C转发第一数据或者第二数据、源节点A重传第一数据或者第三数据可在非同时非同频下进行,在T1时刻,协作节点C在第一频段向目的节点B转发第一数据或者第二数据,
在T2时刻,源节点A在第二频段向目的节点B转发第一数据等。
可选地,在本发明实施例步骤310之后,还包括协作节点对第一数据进行译码处理的步骤,通过该步骤,对第一数据正确译码的协作节点才可继续作为协作节点,参与至协作通信中,避免了通信系统资源的浪费。
具体地,协作节点C接收到第一数据后,对第一数据进行译码处理。当协作节点C未对第一数据正确译码时,协作节点C确认自身无法实现作为协作节点的功能,生成第一通知信号。协作节点C向源节点A和目的节点B发送第一通知信号,第一通知信号用于使源节点A和目的节点B确认协作节点C不再作为协作节点;当协作节点C对第一数据正确译码时,协作节点C确认自身可以实现作为协作节点的功能,生成第二通知信号。协作节点C向源节点A和目的节点B发送第二通知信号,第二通知信号用于使源节点A和目的节点B确认协作节点C仍作为协作节点。
其它协作节点在接收到第一数据后,也进行上述译码处理,根据译码结果生成对应的通知信号,在此不再复述。
需要说明的是,在本发明实施例中,只有成功接收源节点发送的第一数据的协作节点,才能够在接收到目的节点发送的非确认信号后,进行第一数据或者第二数据的转发操作。如果协作节点未成功接收源节点发送的第一数据,则协作节点不参与当次的协作通信。
下面结合附图4,对本发明的实施例提供的方案进行说明。图4为本发明实施例提供的另一种通信方法,在所述方法中,执行主体为源节点,具体包括以下步骤:
步骤410、源节点向目的节点发送第一数据。
具体地,在本发明实施例中,以通信系统中包括源节点A、目的节点B、协作节点C为例进行说明。
源节点A准备与目的节点B进行数据通信。源节点A向目的节点B发送第一数据。第一数据为源节点A的待传输数据。
进一步地,在本发明实施例中,源节点A在向目的节点B发送第一数据的同时,源节点A也向协作节点C发送第一数据。
步骤420、当所述目的节点未对所述第一数据正确译码时,所述源节点接收所述目的节点发送的非确认信号。
具体地,目的节点B接收到第一数据后,对第一数据进行译码处理。节点对数据进行译码处理为现有技术,在此不再复述。目的节点B根据译码处理的结果生成对应的信号,并向源节点A发送该信号。
例如,当目的节点B未对第一数据正确译码时,目的节点B生成非确认信号,并向源节点A发送非确认信号。
进一步地,在本发明实施例中,目的节点B在向源节点A发送非确认信号的同时,目的节点B也向协作节点C发送非确认信号。
步骤430、根据所述非确认信号,所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
具体地,源节点A接收到非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,源节点A在预设的重传次数内,根据非确认信号,启动重传模式,向目的节点B重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。
在本发明实施例中,源节点A在向目的节点B多次重传数据前,对第一数据进行不同的编码处理,以使每次转发的数据在包含第一数据信息的基础上,具有不同的冗余版本,进而提高通信质量;或者,通过使源节点A的重传数据与协作节点C的重传数据能够协作译码,进而提升通信质量。当然,源节点A和协作节点C均可以重传相同的数据,例如,均重传第一数据,这样则可以简化目的节点B的接收处理。
进一步地,协作节点C接收到目的节点B发送的非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,协作节点C
根据非确认信号,启动协作传输模式,向目的节点B转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。
同理,协作节点C在向目的节点多次转发数据前,对第一数据进行不同的编码处理,以使每次转发的数据在包含第一数据信息的基础上,具有不同的冗余版本,进而提高通信质量;或者,通过使协作节点C的重传数据与源节点A的重传数据能够协作译码,进而提升通信质量。当然,协作节点C和源节点A均可以重传相同的数据,例如,均重传第一数据,这样则可以简化目的节点B的接收处理。
如果目的节点B在接收到源节点A和协作节点C发送的重传数据后,还不能够正确译码,则还可以进一步发送非确认信号,从而请求源节点A和协作节点C再次发送重传数据。源节点A和协作节点C可以多次向目的节点发送重传数据,直到预定的最大重传次数。每次发送的重传数据,源节点A和协作节点C都可以发送相同的重传数据,也可以发送不同的重传数据,每次发送的重传数据,也可以互不相同,或者相同。
目的节点B可分别接收协作节点C、或者源节点A发送的重传数据,也可在同一时刻接收协作节点C、或者源节点A发送的重传数据。
可以理解的是,由于在源节点向目的节点重传第一数据时,存在协作节点也向目的节点转发数据,源节点、协作节点通过多通道向目的节点传输数据,提高了通信系统的可靠性。
在本发明实施例中,源节点A与协作节点C之间使用第一通信链路进行通信;源节点A与目的节点B之间使用第三通信链路进行通信。第一通信链路、第三通信链路处于不同的工作频段。
可以理解的是,本发明实施例中的通信链路是各节点之间进行交互通信的统称。各节点在进行具体通信时,可采用多条通信链路进行通信。例如,协作节点C接收源节点A发送第一数据的通信链路、协作节点C向目的节点B转发传数据的通信链路、协作节点C接收目的节点B发送确认信号和/或非确
认信号的通信链路均统称为第一通信链路。
在本发明实施中,源节点A、目的节点B、协作节点C之间的通信,可以采用不同的通道,例如不同的通信频段,提升通信可靠性。例如,源节点A与目的节点B和协作节点C之间的通信链路采用非授权频段,协作节点C与目的节点B之间的通信链路采用授权频段,则在协作传输时,授权频段具有比非授权频段更高的传输可靠性,从而可以减少重传的次数,提升通信可靠性的同时降低通信时延。
在本发明实施例中,协作节点C和源节点A在接收到目的节点B反馈的非确认信号后,协作节点C向目的节点B转发第一数据或者第二数据;源节点A向目的节点B重传第一数据或者第三数据。前述协作节点C转发第一数据或者第二数据、源节点A重传第一数据或者第三数据可在同时同频下进行,例如,在T1时刻,源节点A、协作节点C在第一频段向目的节点B重传、转发第一数据、第二数据、第三数据。当然,前述协作节点C转发第一数据或者第二数据、源节点A重传第一数据或者第三数据可在非同时非同频下进行,在T1时刻,协作节点C在第一频段向目的节点B转发第一数据或者第二数据,在T2时刻,源节点A在第二频段向目的节点B转发第一数据等。
因此,通过应用本发明实施例提供的通信方法,源节点向目的节点发送第一数据。目的节点在接收到第一数据后就开始译码,并根据译码结果,向源节点发送确认信号或者非确认信号,当目的节点对第一数据正确译码时,源节点根据目的节点发的确认信号,停止向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。由于在本发明实施例中,源节点根据目的节点发送的信号,向目的节点重传数据,节省了通信系统资源,避免了资源浪费。
可选地,在本发明实施例中还包括源节点接收目的节点发送的确认信号的步骤。通过该步骤,源节点根据接收的确认信号,停止向目的节点重传第一数据或者经过源节点编码处理的包含第一数据信息的第三数据,避免了通
信系统资源的浪费,降低了数据传输时延。
具体地,当目的节点B对第一数据正确译码时,目的节点B生成确认信号,并向源节点A发送确认信号。源节点A接收目的节点B发送的确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,源节点A根据确认信号,停止向目的节点B重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。
进一步地,在本发明实施例中,目的节点B在向源节点A发送确认信号的同时,目的节点B也向协作节点C发送确认信号。协作节点C接收到确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,协作节点C停止向目的节点B转发第一数据或者经过协作节点C进行编码处理的包含第一数据信息的第二数据。
可选地,在本发明实施例步骤410之后,还包括源节点接收协作节点发送的通知信号的步骤。通过该步骤,对第一数据正确译码的协作节点才可继续作为协作节点,参与至协作通信中,避免了通信系统资源的浪费。
具体地,协作节点C接收到第一数据后,对第一数据进行译码处理。当协作节点C未对第一数据正确译码时,协作节点C确认自身无法实现作为协作节点的功能,生成第一通知信号。协作节点C向源节点A发送第一通知信号,根据第一通知信号源节点A确认协作节点C不再作为协作节点,进而后续也不在向协作节点C发送待传输数据;当协作节点C对第一数据正确译码时,协作节点C确认自身可以实现作为协作节点的功能,生成第二通知信号。协作节点C向源节点A发送第二通知信号,根据第二通知信号源节点A确认协作节点C仍作为协作节点,进而继续向协作节点C发送待传输数据。
需要说明的是,在本发明实施例中,只有成功接收源节点发送的第一数据的协作节点,才能够在接收到目的节点发送的非确认信号后,进行第一数据的转发操作。如果协作节点未成功接收源节点发送的第一数据,则协作节点不参与当次的协作通信。
可选地,在本发明实施例步骤410之前,还包括源节点与目的节点选择协作节点的步骤。通过该步骤,可使选择出的协作节点参与到协作通信中,提高数据传输可靠性。
具体地,源节点A向目的节点B和第一节点发送请求发送(英文:Request To Send,简称:RTS)信号。其中,RTS信号包括第一协作请求信息。
目的节点B接收到RTS信号后从中获取第一协作请求信息。目的节点B根据第一协作请求信息确定源节点A已启动协作请求模式,即源节点A请求其它节点进行协作通信。
目的节点B根据RTS信号生成允许发送(Clear To Send,简称:CTS)信号。其中,CTS信号包括第二协作请求信息。在本发明实施例中,目的节点B在确定源节点A已启动协作请求模式后,可直接自启动协作请求模式,生成第二协作请求信息。
需要说明的是,在本发明实施例中,在RTS信号、CTS信号中增加1bit字段,该字段用于承载协作请求信息。例如,字段为1时,表明源节点A、目的节点B请求协作通信;字段为0时,表明源节点A、目的节点B不请求协作通信。
目的节点B向源节点A发送CTS信号。源节点A接收目的节点B发送的CTS信号。源节点A从CTS信号中获取第二协作请求信息。
源节点A根据第二协作请求信息,确定目的节点B启动协作请求模式。在本发明实施例中,源节点A中存储了源节点A与目的节点B之间网络的拓扑信息,该拓扑信息中包括了网络中各节点的位置、连接关系等等。源节点A根据拓扑信息,从第一节点中,随机选择出至少一个节点作为协作节点。
在本发明实施例中,源节点A在向目的节点B发送RTS信号的同时,还向第一节点发送RTS信号。可以理解的是,目的节点B在向源节点A发送CTS信号的同时,也向第一节点发送CTS信号。第一节点根据RTS信号和CTS信号确定自身是否可以作为协作节点。在一种实现方式中,当第一节点接收到
包括第一协作请求信息的RTS信号,且接收到包括第二协作请求信息的CTS信号时,第一节点确定自身为协作节点。
前述第一节点为处于源节点A以及目的节点B周围,且能接收到RTS信号以及CTS信号的节点。
需要说明的是,源节点A在发送RTS信号时,在其周围可能只存在目的节点B而未存在第一节点,此时,仅有目的节点B接收到RTS信号。在这种情况下,由于源节点A与目的节点B之间不存在第一节点,进而也就不再进行协作节点的选择以及协作通信,也即是,源节点A仅与目的节点B之间进行数据通信,而不再选择出参与协作通信的协作节点。
进一步地,在本发明实施例中,RTS信号还包括源节点A发送RTS信号的第一时间。
目的节点B接收到RTS信号后从中第一时间。目的节点B根据第一时间确定源节点发送RTS信号的时间。
进一步地,目的节点B根据接收到RTS信号,测量源节点A与目的节点B之间的信道质量值(例如,信道能量值,信道比值等等)。根据该信道质量值,目的节点B确定是否启动协作请求模式。例如,目的节点B将信道质量值与预设的质量阈值进行比较;如果信道质量值不超过质量阈值,则目的节点B确认与源节点A之间的信道质量较差,需要启动协作请求模式,此时,目的节点B生成第二协作请求信息,同时,根据信道质量值,目的节点B确定请求协作的节点的个数。
目的节点B记录接收到RTS信号的时间,目的节点B根据第一时间以及接收到RTS信号的时间,确定目的节点B与源节点A之间的路径时延。在一个例子中,目的节点B将第一时间(Ttx_RTS)与接收到RTS信号的时间(Trx_RTS)的差值(Ttx_RTS-Trx_RTS)作为目的节点B与源节点A之间的路径时延。
在另一个例子中,目的节点B获取自身与源节点A之间的路径损耗L(路
径损耗L为源节点A发送RTS信号强度值与目的节点B接收RTS信号强度值的差值),进而根据路径损耗,按照典型的信道模型参数配置,估计得到源节点A和目的节点B之间的传输路径长度,进而根据传输路径长度,估计得到目的节点B与源节点A之间的路径时延。
目的节点B生成允许发送(Clear To Send,简称:CTS)信号。其中,CTS信号包括第二协作请求信息、目的节点B与源节点A之间的信道质量值、目的节点B与源节点A之间的路径时延、目的节点B发送CTS信号的第二时间、和目的节点B请求协作的节点的个数。
目的节点B向源节点A发送CTS信号。源节点A接收目的节点B发送的CTS信号。源节点A从CTS信号中获取第二协作请求信息、目的节点B与源节点A之间的信道质量信息、目的节点B与源节点A之间的路径时延、目的节点B发送CTS信号的第二时间、和目的节点B请求协作的节点的个数。
源节点A根据第二协作请求信息,确定目的节点B启动协作请求模式。源节点A根据信道质量信息、路径时延、第二时间和目的节点B请求协作的节点的个数,从第一节点中选取至少一个节点作为协作节点。
在本发明实施例中,源节点A中存储了源节点A与目的节点B之间网络的拓扑信息,该拓扑信息中包括了网络中各节点的位置、连接关系等等。源节点A根据拓扑信息,从第一节点中,选择出满足信道质量信息、路径时延、第二时间以及目的节点B请求协作的节点的个数的至少一个节点作为协作节点。
如前述,源节点A在向目的节点B发送RTS信号的同时,还向第一节点发送RTS信号。目的节点B在向源节点A发送CTS信号的同时,也向第一节点发送CTS信号。第一节点根据RTS信号和CTS信号确定自身是否可以作为协作节点。在一种实现方式中,第一节点从RTS信号中获取第一时间,从CTS信号中获取第二时间。第一节点根据第一时间和第二时间判断自身是否可以作为协作节点。
在一个例子中,第一节点根据第二时间以及接收到CTS信号的时间,确定第一节点与目的节点B之间的路径时延。第一节点根据从CTS信号中获取的目的节点B与源节点A之间的路径时延以及第一节点与目的节点B之间的路径时延,判断上述两个路径时延的差值是否不超过时延阈值,如果不超过时延阈值,则第一节点确定自身为协作节点。
在另一个例子中,第一节点根据第一时间以及接收到RTS信号的时间,确定第一节点与源节点A之间的路径时延。第一节点根据从CTS中获取的目的节点B与源节点A之间的路径时延以及第一节点与源节点A之间的路径时延,判断上述两个路径时延的差值是否不超过时延阈值。如果不超过时延阈值,则第一节点确定自身为协作节点。
其中,目的节点B与源节点A之间的路径时延,第一节点可从CTS信号中直接获取。
可选地,在本发明实施例中,源节点A发送的RTS信号除了包括第一协作请求信息、源节点A发送RTS信号的第一时间外,还包括源节点A重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据的第一预留时间。
具体地,源节点A在发送RTS信号之前,源节点A为后续与目的节点B、协作节点C之间的相互通信预留通信时间。本发明实施例中的第一预留时间为源节点A预留的源节点A重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据的时间。当源节点A接收到目的节点B发送的非确认信号时,源节点A启动重传模式,在第一预留时间内,源节点A向目的节点B重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。第一预留时间还用于使目的节点B和接收到RTS信号的第一节点明确源节点B重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据的时间。
可以理解的是,当源节点A接收到目的节点B发送的非确认信号时,源
节点A确认目的节点B未对第一数据进行正确译码,源节点A启动重传模式,向目的节点B重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。当源节点A已向目的节点B重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据,且还未超过第一预留时间时,源节点A可向第一节点中作为协作节点的节点发送资源释放信号,该资源释放信号用以通知节点可释放与源节点A、目的节点B之间的通信资源,从而提高了通信系统的资源利用率。
可选地,在本发明实施例中,源节点A发送的RTS信号除了包括第一协作请求信息、源节点A发送RTS信号的第一时间和第一预留时间外,还包括第一节点中作为协作节点的节点转发第一数据或者经过第一节点中作为协作节点的节点进行编码处理的包含第一数据信息的第二数据的第二预留时间。
具体地,源节点A在发送RTS信号之前,源节点A为后续与目的节点B、协作节点之间的相互通信预留通信时间。本发明实施例中的第二预留时间为源节点A预留的第一节点中作为协作节点的节点转发第一数据或者经过第一节点中作为协作节点的节点进行编码处理的包含第一数据信息的第二数据的时间。当第一节点中作为协作节点的节点接收到目的节点B发送的非确认信号时,作为协作节点的节点启动协作传输模式,在第二预留时间内,向目的节点B转发第一数据或者经过第一节点中作为协作节点的节点进行编码处理的包含第一数据信息的第二数据。
前述第一预留时间和第二预留时间可为同一个预留时间,或者为不同的预留时间,可根据实际情况进行配置。
进一步地,源节点A发送的RTS信号还包括源节点预留的目的节点B多次发送非确认信号或者确认信号的第三预留时间。由于目的节点B存在不能对第一数据一次译码成功的情况,进而目的节点B需多次对第一数据进行译码,因此,源节点A在发送的RTS信号前,对可能多次发送非确认信号或者确认信号的时间进行预留。当目的节点B对第一数据正确译码时,在第三预
留时间内,目的节点B向源节点A、协作节点(该协作节点为第一节点中作为协作节点的节点)发送确认信号;当目的节点B未对第一数据正确译码时,在第三预留时间内,目的节点B向源节点A、协作节点发送非确认信号。
可以理解的是,目的节点B已对第一数据进行译码处理,并向源节点A、协作节点发送信号。当目的节点B已向源节点A、协作节点发送对应信号后,且还未达到第三预留时间时,目的节点B可向协作节点发送资源释放信号,该资源释放信号用以通知协作节点可释放与源节点A、目的节点B之间的通信资源,从而提高了通信系统的资源利用率。
在本发明实施例中,RTS信号中还可包括源节点预留的目的节点发送CTS信号的时间、源节点发送第一数据的时间、目的节点首次发送确认信号或非确认信号的时间;CTS信号中还可包括目的节点预留的源节点发送第一数据的时间、目的节点首次发送确认信号或非确认信号的时间。可以理解的是,上述预留时间可根据实际情况,灵活设置。
在本发明实施例中,RTS信号还可以包括源节点A的地址、目的节点B的地址等信息。进一步地,RTS信号还可以包括源节点A请求协作的节点的个数,该请求协作的节点的个数可使目的节点作为选择请求协作的节点的个数的参考。
下面结合附图5,对本发明的实施例提供的方案进行说明。图5为本发明实施例提供的另一种通信方法,在所述方法中,执行主体为目的节点,具体包括以下步骤:
步骤510、目的节点接收源节点发送的第一数据。
具体地,在本发明实施例中,以通信系统中包括源节点A、目的节点B、协作节点C为例进行说明。
源节点A准备与目的节点B进行数据通信。源节点A向目的节点B发送第一数据。目的节点B接收第一数据。第一数据为源节点A的待传输数据。
进一步地,在本发明实施例中,源节点A在向目的节点B发送第一数据
的同时,源节点A也向协作节点C发送第一数据。
步骤520、所述目的节点对所述第一数据进行译码处理。
具体地,目的节点B接收到第一数据后,对第一数据进行译码处理。节点对数据进行译码处理为现有技术,在此不再复述。
步骤530、当所述目的节点未对所述第一数据正确译码时,所述目的节点向所述源节点和协作节点发送非确认信号。
具体地,目的节点B根据译码处理的结果生成对应的信号,并向源节点A和协作节点C发送该信号。
例如,当目的节点未对第一数据正确译码时,目的节点B生成非确认信号,并向源节点A和协作节点C发送非确认信号。
可选地,在本发明实施例中还包括目的节点B接收源节点A、协作节点C发送的重传数据的步骤。通过该步骤,协作节点C、源节点A根据接收的非确认信号,向目的节点B重传/转发数据,通过协作通信提升了传输可靠性。
在本发明实施例中,目的节点B可分别接收协作节点C、或者源节点A发送的重传数据,也可在同一时刻接收协作节点C、或者源节点A发送的重传数据。
具体地,目的节点B接收协作节点C转发的第一数据或者经过协作节点C进行编码处理的包含第一数据信息的第二数据;或者,目的节点B接收源节点A重传的第一数据或者经过源节点A进行编码处理的包含第一数据信息的第三数据;或者,目的节点B接收协作节点C转发的第一数据或者经过协作节点C进行编码处理的包含第一数据信息的第二数据,和源节点A重传的第一数据或者经过源节点A进行编码处理的包含第一数据信息的第三数据。
协作节点C接收到目的节点B发送的非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,协作节点C根据非确认信号,启动协作传输模式,向目的节点B转发第一数据经过协作节点C进行编码处理的包含第一数据信息的第二数据。
在本发明实施例中,协作节点C在向目的节点转发重传数据前,可以对第一数据进行不同的编码处理,以使每次转发的数据在包含第一数据信息的基础上,具有不同的冗余版本,进而提高通信质量;或者,通过使协作节点C的重传数据与源节点A的重传数据能够进行协作译码,进而提升通信质量。当然,协作节点C和源节点A均可以重传相同的数据,例如,均重传第一数据,这样则可以简化目的节点B的接收处理。
源节点A接收到非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,源节点A根据非确认信号,启动重传模式,向目的节点B重传第一数据或者经过源节点A进行编码处理的包含第一数据信息的第三数据。
同理,源节点A在向目的节点B多次重传数据前,对第一数据进行不同的编码处理,以使每次转发的数据在包含第一数据信息的基础上,具有不同的冗余版本,进而提高通信质量;或者,通过使源节点A的重传数据与协作节点C的重传数据能够协作译码,进而提升通信质量。当然,源节点A和协作节点C均可以重传相同的数据,例如,均重传第一数据,这样则可以简化目的节点B的接收处理。
如果目的节点B在接收到源节点A和协作节点C发送的重传数据后,还不能够正确译码,则还可以进一步发送非确认信号,从而请求源节点A和协作节点C再次发送重传数据。源节点A和协作节点C可以多次向目的节点发送重传数据,直到预定的最大重传次数。每次发送的重传数据,源节点A和协作节点C都可以发送相同的重传数据,也可以发送不同的重传数据,每次发送的重传数据,也可以互不相同,或者相同。
可以理解的是,由于在源节点向目的节点重传数据时,存在协作节点也向目的节点转发数据,源节点、协作节点通过多通道向目的节点传输数据,提高了通信系统的可靠性。
在本发明实施例中,目的节点B与协作节点C之间使用第二通信链路进
行通信;目的节点B与源节点A之间使用第三通信链路进行通信。第二通信链路、第三通信链路处于不同的工作频段。
可以理解的是,本发明实施例中的通信链路是各节点之间进行交互通信的统称。各节点在进行具体通信时,可采用多条通信链路进行通信。例如,协作节点C接收源节点A发送第一数据的通信链路、协作节点C向目的节点B转发传数据的通信链路、协作节点C接收目的节点B发送确认信号和/或非确认信号的通信链路均统称为第一通信链路。
在本发明实施中,源节点A、目的节点B、协作节点C之间的通信,可以采用不同的通道,例如不同的通信频段,提升通信可靠性。例如,源节点A与目的节点B和协作节点C之间的通信链路采用非授权频段,协作节点C与目的节点B之间的通信链路采用授权频段,则在协作传输时,授权频段具有比非授权频段更高的传输可靠性,从而可以减少重传的次数,提升通信可靠性的同时降低通信时延。
在本发明实施例中,协作节点C和源节点A在接收到目的节点B反馈的非确认信号后,协作节点C向目的节点B转发第一数据或者第二数据;源节点A向目的节点B重传第一数据或者第三数据。前述协作节点C转发第一数据或者第二数据、源节点A重传第一数据或者第三数据可在同时同频下进行,例如,在T1时刻,源节点A、协作节点C在第一频段向目的节点B重传、转发第一数据、第二数据、第三数据。当然,前述协作节点C转发第一数据或者第二数据、源节点A重传第一数据或者第三数据可在非同时非同频下进行,在T1时刻,协作节点C在第一频段向目的节点B转发第一数据或者第二数据,在T2时刻,源节点A在第二频段向目的节点B转发第一数据等。
因此,通过应用本发明实施例提供的通信方法,目的节点在接收到源节点发送的第一数据后就开始译码,并根据译码结果,向协作节点和源节点发送确认信号或者非确认信号,当目的节点未对第一数据正确译码时,协作节点和源节点根据接收的非确认信号,停止向目的节点发送第一数据或者经过
编码处理后的数据。由于在本发明实施例中,源节点、协作节点均是根据目的节点发送的信号,停止向目的节点重传/转发数据,节省了通信系统资源,避免了资源浪费。
可选地,在本发明实施例中还包括目的节点向源节点、协作节点发送确认信号的步骤。通过该步骤,协作节点根据接收的确认信号,启动协作传输模式,向目的节点重传/转发数据,避免了通信系统资源的浪费,降低了数据传输时延。
具体地,当目的节点B对第一数据正确译码时,目的节点B生成确认信号,并向源节点A、协作节点C发送确认信号。协作节点C接收到确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,协作节点C停止向目的节点B转发第一数据或者经过协作节点C进行编码处理的包含第一数据信息的第二数据。
源节点A接收目的节点B发送的确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,源节点A根据确认信号,停止向目的节点B重传第一数据或者经过源节点A进行编码处理的包含第一数据信息的第三数据。
可选地,在本发明实施例步骤520之后,还包括目的节点接收协作节点发送的通知信号的步骤。通过该步骤,对第一数据正确译码的协作节点才可继续作为协作节点,参与至协作通信中,避免了通信系统资源的浪费。
具体地,协作节点C接收到第一数据后,对第一数据进行译码处理。当协作节点C未对第一数据正确译码时,协作节点C确认自身无法实现作为协作节点的功能,生成第一通知信号。协作节点C向目的节点B发送第一通知信号,根据第一通知信号目的节点B确认协作节点C不再作为协作节点,进而也不在向协作节点C发送确认信号或者非确认信号;当协作节点C对第一数据正确译码时,协作节点C确认自身可以实现作为协作节点的功能,生成第二通知信号。协作节点C向目的节点B发送第二通知信号,根据第二通知
信号源节点A确认协作节点C仍作为协作节点,进而继续向协作节点C发送确认信号或者非确认信号。
需要说明的是,在本发明实施例中,只有成功接收源节点发送的第一数据的协作节点,才能够在接收到目的节点发送的非确认信号后,进行第一数据的转发操作。如果协作节点未成功接收源节点发送的第一数据,则协作节点不参与当次的协作通信。
可选地,在本发明实施例步骤510之前,还包括源节点与目的节点选择协作节点的步骤。通过该步骤,可使选择出的协作节点参与到协作通信中,提高数据传输可靠性。
具体地,源节点A向目的节点B以及第一节点发送RTS信号。其中,RTS信号包括第一协作请求信息。
目的节点B接收到RTS信号后从中获取第一协作请求信息。目的节点B根据第一协作请求信息确定源节点A已启动协作请求模式,即源节点A请求其它节点进行协作通信。
目的节点B根据RTS信号生成允许发送(Clear To Send,简称:CTS)信号。其中,CTS信号包括第二协作请求信息。在本发明实施例中,目的节点B在确定源节点A已启动协作请求模式后,可直接自启动协作请求模式,生成第二协作请求信息。
可以理解的是,在前述实施例中,已详细描述了源节点A向目的节点B发送RTS信号、目的节点B向源节点A发送CTS信号的具体过程,在此不再复述。
进一步地,在本发明实施例中,RTS信号还包括源节点A发送RTS信号的第一时间。
可以理解的是,在前述实施例中,已详细描述了RTS信号中包括第一时间时,目的节点可根据第一时间确定其他相关信息,并将其他相关信息携带在CTS信号中的具体过程,在此不再复述。
可选地,在本发明实施例中,目的节点B发送的CTS信号还包括源节点A重传第一数据或者经过源节点A进行编码处理的包含第一数据信息的第三数据的第一预留时间、第一节点中作为协作节点的节点转发第一数据或者经过第一节点中作为协作节点的节点进行编码处理的包含第一数据信息的第二数据的第二预留时间、目的节点B多次发送非确认信号或者确认信号的第三预留时间。
具体地,目的节点B在发送CTS信号之前,目的节点B为后续与源节点A、协作节点C之间的相互通信预留通信时间。本发明实施例中的第一预留时间为目的节点B预留的源节点A重传第一数据或者经过源节点A进行编码处理的包括第一数据信息的第三数据的时间。当源节点A接收到目的节点发送的非确认信号时,源节点启动重传模式,在第一预留时间内,源节点A向目的节点B重传第一数据或者经过源节点A进行编码处理的包括第一数据信息的第三数据。第一预留时间还用于使源节点A和接收到RTS信号的第一节点明确源节点A重传第一数据或者经过源节点A进行编码处理的包括第一数据信息的第三数据的时间。
可以理解的是,当源节点A接收到目的节点B发送的非确认信号时,源节点A确认目的节点B未对第一数据进行正确译码,源节点A启动重传模式,向目的节点B重传第一数据或者经过源节点A进行编码处理的包括第一数据信息的第三数据。当源节点A已向目的节点B重传第一数据或者经过源节点A进行编码处理的包括第一数据信息的第三数据,且还未达到第一预留时间。此时,源节点A可向第一节点中作为协作节点的节点发送资源释放信号,该资源释放信号用以通知节点可释放与源节点A、目的节点B之间的通信资源,从而提高了通信系统的资源利用率。
本发明实施例中的第二预留时间为目的节点B预留的第一节点中作为协作节点的节点转发第一数据或者经过第一节点中作为协作节点的节点进行编码处理的包含第一数据信息的第二数据的时间。当第一节点中作为协作节点
的节点接收到目的节点B发送的非确认信号时,作为协作节点的节点启动协作传输模式,在第二预留时间内,向目的节点B转发第一数据或者经过第一节点中作为协作节点的节点进行编码处理的包含第一数据信息的第二数据。
前述第一预留时间和第二预留时间可为同一个预留时间,或者为不同的预留时间,可根据实际情况进行配置。
进一步地,CTS信号还包括目的节点B多次发送非确认信号或者确认信号的第三预留时间。由于目的节点B存在不能对第一数据一次译码成功的情况,进而目的节点B需多次对第一数据进行译码,因此,目的节点B在发送的CTS信号前,对可能多次发送非确认信号或者确认信号的时间进行预留。当目的节点B对第一数据正确译码时,在第三预留时间内,目的节点B向源节点A、协作节点(该协作节点为第一节点中作为协作节点的节点)发送确认信号;当目的节点B未对第一数据正确译码时,在第三预留时间内,目的节点B向源节点A、协作节点发送非确认信号。
可以理解的是,目的节点B已对第一数据进行译码处理,并向源节点A、协作节点发送信号。当目的节点B已向源节点A、协作节点发送对应信号后,且还未达到第三预留时间时,目的节点B可向协作节点发送资源释放信号,该资源释放信号用以通知协作节点可释放与源节点A、目的节点B之间的通信资源,从而提高了通信系统的资源利用率。
下面结合附图6,对本发明的实施例提供的方案进行说明。图6为本发明实施例提供的另一种通信方法,在所述方法中,执行主体为第一节点,具体包括以下步骤:
步骤610、第一节点判断是否接收到源节点发送的请求发送RTS信号以及目的节点发送的允许发送CTS信号。
具体地,在本发明实施例中,以通信系统中包括源节点A、目的节点B、至少一个第一节点为例进行说明。
源节点A向第一节点发送RTS信号,目的节点B向第一节点发送CTS信
号。
第一节点判断自身是否接收到RTS信号以及CTS信号。
步骤620、如果所述第一节点接收到所述源节点发送的RTS信号,且接收到所述目的节点发送的CTS信号,则所述第一节点确定所述第一节点为候选协作节点。
具体地,如果第一节点在接收到RTS信号后,又接收到CTS信号,则第一节点确定自身为候选协作节点。
可以理解的是,如果第一节点只接收到RTS信号或者只接收到CTS信号,则第一节点不能成为候选协作节点,进而也无法成为协作节点。
可选地,本发明实施例还包括第一节点识别RTS信号、CTS信号中包括的各类信息的步骤。通过该步骤,可使第一节点成为候选协作节点的基础上,进一步确定自身是否可成为协作节点,进而参与协作通信,提高通信系统的可靠性。
下面根据RTS信号、CTS信号中包括的各类信息进行说明。
在第一种实现方式中,第一节点识别RTS信号、CTS信号是否包括协作请求信息,通过识别协作请求信息,第一节点确定自身是否可成为协作节点。
具体地,第一节点接收到RTS信号以及CTS信号后,第一节点确定自身为候选协作节点。第一节点识别RTS信号中是否包括第一协作请求信息,CTS信号中是否包括第二协作请求信息。
如果RTS信号包括第一协作请求信息,且CTS信号包括第二协作请求信息,则作为候选协作节点的第一节点确定自身为协作节点。
在第二种实现方式中,第一节点获取自身与源节点A之间的信道质量值、自身与目的节点B之间的信道质量值,通过上述获取的信道质量值,第一节点确定自身是否可成为协作节点。
具体地,第一节点获取自身与源节点A之间的第一信道质量值以及自身与目的节点B之间的第二信道质量值。在本发明实施例中,第一节点根据接
收到RTS信号,测量自身与源节点A之间的第一信道质量值;第一节点根据接收到CTS信号,测量自身与目的节点B之间的第二信道质量值。
第一节点判断第一信道质量值是否超过第一质量阈值,且第二信道质量值是否超过第二质量阈值。如果第一信道质量值超过第一质量阈值,且第二信道质量值超过第二质量阈值,则作为候选协作节点的第一节点确定第一节点为协作节点。
或者,第一节点接收到RTS信号以及CTS信号后,第一节点确定自身为候选协作节点。第一节点识别CTS信号是否包括目的节点B与源节点A之间的第三信道质量值。
如果CTS信号包括第三信道质量值,第一节点判断第一信道质量值是否超过第三信道质量阈值,且第三质量值是否超过第四信道质量阈值。如果第一信道质量值超过第三质量阈值,且第三信道质量值超过第四质量阈值,则作为候选协作节点的第一节点确定第一节点为协作节点。
在本发明实施例中,第一质量阈值与第三质量阈值可为相同或不同的阈值。
在第三种实现方式中,第一节点从RTS信号、CTS信号中获取节点发送对应信号的时间,根据获取的时间,第一节点确定自身是否可成为协作节点。
在一个例子中,当RTS信号包括源节点A发送RTS信号的第一时间,CTS信号包括目的节点B与源节点A之间的第一路径时延时,第一节点从RTS信号中第一时间。从CTS信号中获取目的节点B与源节点A之间的第一路径时延。
第一节点记录接收到RTS信号的第二时间。根据第一时间以及第二时间,第一节点确定第一节点与源节点A之间的第二路径时延。第一节点根据第一路径时延和第二路径时延,判断第一路径时延与第二路径时延的差值是否不超过时延阈值。如果第一路径时延与第二路径时延的差值不超过时延阈值,则作为候选协作节点的第一节点确定第一节点为协作节点。
在另一个例子中,当CTS信号包括目的节点B发送CTS信号的第三时间以及目的节点B与源节点A之间的第一路径时延时,第一节点从CTS信号中获取第三时间以及第一路径时延。
第一节点记录接收到CTS信号的第四时间。根据第三时间以及第四时间,第一节点确定第一节点与目的节点B之间的第三路径时延。第一节点根据第一路径时延和第三路径时延,判断第一路径时延与第三路径时延的差值是否不超过时延阈值。如果第一路径时延与第三路径时延的差值不超过时延阈值,则作为候选协作节点的第一节点确定第一节点为协作节点。
在第四种实现方式中,第一节点从CTS信号中获取目的节点请求协作的节点的个数,根据该请求协作的节点的个数,第一节点确定自身是否可成为协作节点。
具体地,当CTS信号包括目的节点B请求协作的节点的个数m时,第一节点从CTS信号中获取请求协作的节点的个数m,并获取源节点与目的节点之间网络的拓扑信息。所述拓扑信息已预先存储在第一节点中。拓扑信息中包括了网络中各节点的位置、连接关系等等。
根据拓扑信息,第一节点确定候选协作节点的个数M。第一节点可通过拓扑信息中,源节点A、目的节点B与其它节点的位置、连接关系,确定候选协作节点的个数。
根据候选协作节点的个数M,第一节点在候选协作节点集合内生成节点随机数。所述候选协作节点集合为[1,M]。所述节点随机数为[1,M]中的任一整数。第一节点将节点随机数与请求协作的节点的个数m进行比较。如果节点随机数不大于请求协作的节点的个数m时,作为候选协作节点的第一节点确定第一节点为协作节点。
例如,目的节点请求协作的节点的个数,m=8;候选协作节点的个数,M=15,在第一集合[1,15]中,第一节点生成的节点随机数为6。此时,第一节点判断节点随机数不大于请求协作的节点的个数m,则第一节点作为候选协作节点确
定自身为协作节点。
通过本发明实施例,第一节点确定自身为协作节点后,第一节点还可分别向源节点、目的节点发送通知信号。该通知信号用于使源节点、目的节点明确哪些节点作为协作节点,进而在后续进行协作通信时,源节点向协作节点发送第一数据,目的节点向协作节点发送确认信号或者非确认信号。
可以理解的是,上述以举例的方式描述了协作节点的确定过程,在实际应用中,还可由技术人员预先对协作节点进行配置的方式,并将配置完成的协作节点在源节点、目的节点中进行配置。
因此,通过应用本发明实施例提供的通信方法,第一节点根据源节点发送的RTS信号和目的节点发送的CTS信号,以及RTS信号和CTS信号中包括的相关信息,判断自身是否可以成为协作节点,当自身可以成为协作节点时,参与至源节点和目的节点的通信中。实现了通过协作通信的传输可靠性提高增益,并且,避免了协作节点的多次转发操作所带来的时延增加和资源浪费的问题。
下面结合附图7,对本发明实施例提供的方案进行说明。图7为本发明实施例提供的一种通信方法的时序图。具体包括以下步骤:
步骤710、源节点向目的节点和协作节点发送第一数据。
具体地,在本发明实施例中,以通信系统中包括源节点A、目的节点B、协作节点C为例进行说明。
源节点A准备与目的节点B进行数据通信。源节点A向目的节点B、协作节点C发送第一数据。所述第一数据为源节点A的待传输数据。
步骤720、目的节点对第一数据进行译码处理。
具体地,目的节点B接收到第一数据后,对第一数据进行译码处理。节点对数据进行译码处理为现有技术,在此不再复述。
步骤730、当目的节点未对第一数据正确译码时,目的节点向源节点和协作节点发送非确认信号。
具体地,目的节点B根据译码处理的结果生成对应的信号,并向源节点A、协作节点C发送该信号。
当目的节点B未对第一数据正确译码时,目的节点B生成非确认信号,并向协作节点C发送非确认信号。
步骤740、根据非确认信号,源节点向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据的第三数据。
具体地,源节点A接收到非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,源节点A根据非确认信号,启动重传模式,向目的节点B重传第一数据或者经过源节点A进行编码处理的包含第一数据的第三数据。
步骤750、根据非确认信号,协作节点向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据的第二数据。
具体地,协作节点C接收到非确认信号后,确定目的节点B已接收到第一数据,但并未对第一数据进行正确译码,协作节点C根据非确认信号,启动协作传输模式,向目的节点B转发第一数据或者经过协作节点C进行编码处理的包含第一数据的第二数据。
步骤760、当目的节点对第一数据正确译码时,目的节点向源节点和协作节点发送确认信号。
具体地,当目的节点B对第一数据正确译码时,目的节点B生成确认信号,并向源节点A、协作节点C发送非确认信号。
步骤770、根据确认信号,源节点停止向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据的第三数据。
具体地,源节点A接收到确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,源节点A根据确认信号,停止向目的节点B重传第一数据或者经过源节点A进行编码处理的包含第一数据的第三数据。
步骤780、根据确认信号,协作节点停止向目的节点转发第一数据。
具体地,协作节点C接收到确认信号后,确定目的节点B已接收到第一数据,并对第一数据进行了正确译码,协作节点C根据确认信号,停止向目的节点B转发第一数据或者经过协作节点C进行编码处理的包含第一数据的第二数据。
可以理解的是,前述实施例已详细说明各步骤的具体实现过程,在此仅是简要描述。
下面结合附图8,对本发明实施例提供的方案进行说明。图8为本发明实施例提供的另一种通信方法的时序图。具体包括以下步骤:
步骤801、源节点向目的节点和第一节点发送RTS信号。
具体地,源节点A生成RTS信号。其中,RTS信号包括第一协作请求信息和源节点A发送RTS信号的第一时间。
源节点A向目的节点B和第一节点发送RTS信号。
步骤802、目的节点向源节点和第一节点发送CTS信号。
具体地,根据RTS信号,目的节点B向源节点A和第一节点发送CTS信号。
可以理解的是,前述实施例已详细说明目的节点B根据RTS信号向源节点A和第一节点发送CTS信号的具体实现过程,在此不在复述。
步骤803、第一节点中作为协作节点的节点向源节点、目的节点发送通知信号。
具体地,前述实施例已详细说明第一节点根据RTS信号、CTS信号确定自身是否可以成为协作节点的具体实现过程,在此不在复述。
步骤804、源节点向目的节点和协作节点发送第一数据。
步骤805、目的节点对第一数据进行译码处理。
步骤806、当目的节点未对第一数据正确译码时,目的节点向源节点和协作节点发送非确认信号。
步骤807、根据非确认信号,源节点向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。
步骤808、根据非确认信号,协作节点向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。
步骤809、当目的节点对第一数据正确译码时,目的节点向源节点和协作节点发送确认信号。
步骤810、根据确认信号,源节点停止向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。
步骤811、根据确认信号,协作节点停止向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。
可以理解的是,前述实施例已详细说明了步骤804-步骤811的具体实现过程,在此不在复述。
上述实施例描述的内容均可实现通信方法,相应地,本发明实施例还提供了一种通信装置,用以实现前述实施例中提供的通信方法,如图9所示,所述装置包括:接收单元910以及发送单元920。
所述接收单元910,用于接收源节点发送的第一数据;
所述接收单元910还用于,当目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;
发送单元920,用于根据所述确认信号,停止向所述目的节点转发所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第二数据。
进一步地,所述接收单元910还用于,当所述目的节点未对所述第一数据正确译码时,接收所述目的节点发送的非确认信号;
所述发送单元920还用于,根据所述非确认信号,向所述目的节点转发所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第二数据。
进一步地,所述装置与所述源节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第二通信链路进行通信;
所述第一通信链路与所述第二通信链路处于不同的工作频段。
该通信装置的各功能模块的功能,可以通过前述方法实施例所描述的各步骤来实现,因此,本发明提供的通信装置的具体工作过程,在此不复赘述。
因此,通过应用本发明实施例提供的通信装置,目的节点在接收到源节点发送的第一数据后就开始译码,并根据译码结果,向所述装置发送确认信号或者非确认信号。当对第一数据正确译码时,所述装置根据目的节点发送的确认信号,停止向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。从而避免了因协作节点的转发操作所带来的时延增加和资源浪费的问题。
上述实施例描述的内容均可实现通信方法,相应地,本发明实施例还提供了另一种通信装置,用以实现前述实施例中提供的通信方法,如图10所示,所述装置包括:发送单元1010以及接收单元1020。
所述发送单元1010,用于向目的节点发送第一数据;
接收单元1020,用于当所述目的节点未对所述第一数据正确译码时,接收所述目的节点发送的非确认信号;
所述发送单元1010还用于,根据所述非确认信号,向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第三数据。
进一步地,所述接收单元1020还用于,当所述目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;
所述发送单元1010还用于,根据所述确认信号,停止向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第三数据。
进一步地,所述发送单元1010还用于,向协作节点发送第一数据。
进一步地,所述发送单元1010还用于,向所述目的节点和第一节点发送请求发送RTS信号,所述RTS信号包括第一协作请求信息;
所述接收单元1020还用于,接收所述目的节点根据所述RTS信号发送的允许发送CTS信号,所述CTS信号包括第二协作请求信息。
进一步地,所述发送单元1010发送的所述RTS信号还包括所述发送单元重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第三数据的第一预留时间;
所述发送单元1010具体用于,在所述第一预留时间内,向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第三数据。
进一步地,所述发送单元1010发送的所述RTS信号还包括所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述发送单元1010发送的所述RTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间。
进一步地,所述装置与所述协作节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第三通信链路进行通信;
所述第一通信链路与所述第三通信链路处于不同的工作频段。
该通信装置的各功能模块的功能,可以通过前述方法实施例所描述的各步骤来实现,因此,本发明提供的通信装置的具体工作过程,在此不复赘述。
因此,通过应用本发明实施例提供的通信装置,所述装置向目的节点发送第一数据。目的节点在接收到第一数据后就开始译码,并根据译码结果,向所述装置发送确认信号或者非确认信号,当目的节点对第一数据正确译码时,所述装置根据目的节点发的确认信号,停止向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。由于在本发明
实施例中,源节点根据目的节点发送的信号,向目的节点重传数据,节省了通信系统资源,避免了资源浪费。
上述实施例描述的内容均可实现通信方法,相应地,本发明实施例还提供了另一种通信装置,用以实现前述实施例中提供的通信方法,如图11所示,所述装置包括:接收单元1110、译码单元1120以及发送单元1130。
所述接收单元1110,用于接收源节点发送的第一数据;
译码单元1120,用于对所述第一数据进行译码处理;
发送单元1130,用于当所述译码单元未对所述第一数据正确译码时,向所述源节点和协作节点发送非确认信号。
进一步地,所述接收单元1110还用于,接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据;
或者,
接收所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据;
或者,
接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据,和所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
进一步地,所述发送单元1130还用于,当所述译码单元对所述第一数据正确译码时,向所述源节点和所述协作节点发送确认信号。
进一步地,所述接收单元1110还用于,接收所述源节点发送的请求发送RTS信号,所述RTS信号包括第一协作请求信息;
所述发送单元1130还用于,根据所述RTS信号,向所述源节点和第一节点发送允许发送CTS信号,所述CTS信号包括第二协作请求信息。
进一步地,所述接收单元1110接收的所述RTS信号还包括所述源节点重
传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间、所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述发送单元1130发送的所述CTS信号还包括所述发送单元多次发送所述非确认信号或者所述确认信号的第三预留时间;
所述发送单元1130具体用于,在所述第三预留时间内,向所述源节点和所述协作节点发送所述非确认信号或者所述确认信号。
进一步地,所述装置与所述协作节点之间使用第二通信链路进行通信;所述装置与所述源节点之间使用第三通信链路进行通信;
所述第二通信链路与所述第三通信链路处于不同的工作频段。
该通信装置的各功能模块的功能,可以通过前述方法实施例所描述的各步骤来实现,因此,本发明提供的通信装置的具体工作过程,在此不复赘述。
因此,通过应用本发明实施例提供的通信装置,所述装置在接收到源节点发送的第一数据后就开始译码,并根据译码结果,向协作节点和源节点发送确认信号或者非确认信号,当所述装置未对第一数据正确译码时,协作节点和源节点根据接收的非确认信号,停止向所述装置发送第一数据或者经过编码处理后的数据。由于在本发明实施例中,源节点、协作节点均是根据目的节点发送的信号,停止向目的节点重传/转发数据,节省了通信系统资源,避免了资源浪费。
上述实施例描述的内容均可实现通信方法,相应地,本发明实施例还提供了另一种通信装置,用以实现前述实施例中提供的通信方法,如图12所示,所述装置包括:判断单元1210以及确定单元1220。
所述判断单元1210,用于判断是否接收到源节点发送的请求发送RTS信号以及目的节点发送的允许发送CTS信号;
确定单元1220,用于如果所述装置接收到所述源节点发送的RTS信号,
且接收到所述目的节点发送的CTS信号,则确定所述装置为候选协作节点。
进一步地,所述确定单元1220还用于,当所述RTS信号包括第一协作请求信息,且所述CTS信号包括第二协作请求信息时,确定所述装置为协作节点。
进一步地,所述装置还包括:
获取单元1230,用于获取所述装置与所述源节点之间的第一信道质量值以及所述装置与所述目的节点之间的第二信道质量值;
所述判断单元1210还用于,判断所述第一信道质量值是否超过第一质量阈值,且所述第二信道质量值是否超过第二质量阈值;
所述确定单元1220还用于,如果所述第一信道质量值超过所述第一质量阈值,且所述第二信道质量值超过所述第二质量阈值,则确定所述装置为协作节点;
或者,
所述判断单元1210还用于,当所述CTS信号包括所述目的节点与所述源节点之间的第三信道质量值时,所述第一节点判断所述第一信道质量值是否超过所述第三质量阈值,且所述第三质量值是否超过第四信道质量阈值;
所述确定单元1220还用于,如果所述第一信道质量值超过所述第三质量阈值,且所述第三信道质量值超过所述第四质量阈值,则确定所述装置为协作节点;
或者,
所述确定单元1220还用于,当所述CTS信号包括所述目的节点与所述源节点之间的第一路径时延时,确定所述装置与所述目的节点之间的第二路径时延;
所述判断单元1210还用于,根据所述第一路径时延和所述第二路径时延,判断所述第一路径时延与所述第二路径时延的差值是否不超过时延阈值;
所述确定单元1220还用于,如果所述第一路径时延与所述第二路径时延
的差值不超过所述时延阈值,则确定所述装置为协作节点。
该通信装置的各功能模块的功能,可以通过前述方法实施例所描述的各步骤来实现,因此,本发明提供的通信装置的具体工作过程,在此不复赘述。
因此,通过应用本发明实施例提供的通信装置,所述装置根据源节点发送的RTS信号和目的节点发送的CTS信号,以及RTS信号和CTS信号中包括的相关信息,判断自身是否可以成为协作节点,当自身可以成为协作节点时,参与至源节点和目的节点的通信中。实现了通过协作通信的传输可靠性提高增益,并且,避免了协作节点的多次转发操作所带来的时延增加和资源浪费的问题。
另外,本发明实施例中图9所示的通信装置可设置在协作节点中,用以实现前述本发明实施例中的通信方法,如图13所示,所述协作节点包括:接收器1310、处理器1320、发送器1330以及存储器1340。接收器1310、处理器1320、发送器1330以及存储器1340通过总线1350相互连接;总线1350可以是外设部件互连标准(英文:peripheral component interconnect,简称:PCI)总线或者扩展工业标准结构(英文:extended industry standard architecture,简称:EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图13中仅用一条粗线表示,但并不表示仅有一根总线或者一种类型的总线。
处理器1320可以是中央处理器(英文:central processing unit,简称:CPU),网络处理器(英文:network processor,简称:NP)或者CPU和NP的组合。
处理器1320还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(英文:application-specific integrated circuit,简称:ASIC),可编程逻辑器件(英文:programmable logic device,简称:PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(英文:complex programmable logic device,简称:CPLD),现场可编程逻辑门阵列(英文:field-programmable
gate array,简称:FPGA),通用阵列逻辑(英文:generic array logic,简称:GAL)或其任意组合。
存储器1340可以包括易失性存储器(英文:volatile memory),例如随机存取存储器(英文:random-access memory,简称:RAM);存储器也可以包括非易失性存储器(英文:non-volatile memory),例如快闪存储器(英文:flash memory),硬盘(英文:hard disk drive,简称:HDD)或者固态硬盘(英文:solid-state drive,简称:SSD);存储器1340还可以包括上述种类的存储器的组合。
可选地,存储器1340还可以用于存储程序指令,当处理器1320是CPU时,处理器1320调用该存储器1340中存储的程序指令;当处理器1320是FPGA,ASIC等硬件时,处理器1320无需存储器1340存储程序指令,技术人员可将程序指令直接写入FPGA、ASIC的硬件处理器中,FPGA、ASIC可直接执行程序指令。
在本发明实施中,接收器1310,用于接收源节点发送的第一数据;
所述接收器1310还用于,当目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;
所述发送器1330,用于根据所述确认信号,停止向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据。
处理器1320执行图3至图8中涉及协作节点的处理过程和/或用于本申请所描述的技术的其他过程。存储器1340用于存储协作节点实现前述通信方法的程序代码和数据。
可以理解的是,图13仅仅示出了协作节点的简化设计。在实际应用中,协作节点可以包含任意数量的发送器,接收器,处理器,控制器,存储器等,而所有可以实现本发明的协作节点都在本发明的保护范围之内。
进一步地,所述接收器1310还用于,当目的节点未对所述第一数据正确
译码时,接收所述目的节点发送的非确认信号;
所述发送器1330还用于,根据所述非确认信号,向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的所述第二数据。
进一步地,所述装置与所述源节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第二通信链路进行通信;
所述第一通信链路与所述第二通信链路处于不同的工作频段。
因此,通过应用本发明实施例提供的通信装置,目的节点在接收到源节点发送的第一数据后就开始译码,并根据译码结果,向所述装置发送确认信号或者非确认信号。当对第一数据正确译码时,所述装置根据目的节点发送的确认信号,停止向目的节点转发第一数据或者经过协作节点进行编码处理的包含第一数据信息的第二数据。从而避免了因协作节点的转发操作所带来的时延增加和资源浪费的问题。
另外,本发明实施例中图10所示的通信装置可设置在源节点中,用以实现前述本发明实施例中的通信方法,如图14所示,所述源节点包括:接收器1410、处理器1420、发送器1430以及存储器1440。接收器1410、处理器1420、发送器1430以及存储器1440通过总线1450相互连接;总线1450与前述实施例中的总线相同,在此不再复述。
处理器1420、存储器1440也与前述实施例中的处理器、存储器相同,在此不再复述。
在本发明实施中,发送器1430,用于向目的节点发送第一数据;
接收器1410,用于当所述目的节点未对所述第一数据正确译码时,接收所述目的节点发送的非确认信号;
所述发送器1430还用于,根据所述非确认信号,所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
处理器1420执行图3至图8中涉及源节点的处理过程和/或用于本申请所描述的技术的其他过程。存储器1440用于存储源节点实现前述通信方法的程序代码和数据。
可以理解的是,图14仅仅示出了源节点的简化设计。在实际应用中,源节点可以包含任意数量的发送器,接收器,处理器,控制器,存储器等,而所有可以实现本发明的源节点都在本发明的保护范围之内。
进一步地,所述接收器1410还用于,当所述目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;
所述发送器1430还用于,根据所述确认信号,停止向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据。
进一步地,所述发送器1430还用于,向协作节点发送第一数据。
进一步地,所述发送器1430还用于,向所述目的节点和第一节点发送请求发送RTS信号,所述RTS信号包括第一协作请求信息;
所述接收器1410还用于,接收所述目的节点根据所述RTS信号发送的允许发送CTS信号,所述CTS信号包括第二协作请求信息。
进一步地,所述RTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间;
所述发送器1430具体用于,在所述第一预留时间内,向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据。
进一步地,所述RTS信号还包括所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述RTS信号还包括所述目的节点多次发送所述非确认信号或者所述确
认信号的第三预留时间。
进一步地,所述装置与所述协作节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第三通信链路进行通信;
所述第一通信链路与所述第三通信链路处于不同的工作频段。
因此,通过应用本发明实施例提供的通信装置,所述装置向目的节点发送第一数据。目的节点在接收到第一数据后就开始译码,并根据译码结果,向所述装置发送确认信号或者非确认信号,当目的节点对第一数据正确译码时,所述装置根据目的节点发的确认信号,停止向目的节点重传第一数据或者经过源节点进行编码处理的包含第一数据信息的第三数据。由于在本发明实施例中,源节点根据目的节点发送的信号,向目的节点重传数据,节省了通信系统资源,避免了资源浪费。
另外,本发明实施例中图11所示的通信装置可设置在目的节点中,用以实现前述本发明实施例中的通信方法,如图15所示,所述目的节点包括:接收器1510、处理器1520、发送器1530以及存储器1540。接收器1510、处理器1520、发送器1530以及存储器1540通过总线1550相互连接;总线1550与前述实施例中的总线相同,在此不再复述。
处理器1520、存储器1540也与前述实施例中的处理器、存储器相同,在此不再复述。
在本发明实施中,接收器1510,用于接收源节点发送的第一数据;
处理器1520,用于对所述第一数据进行译码处理;
发送器1530,用于当所述处理器未对所述第一数据正确译码时,向所述源节点和协作节点发送非确认信号。
处理器1520执行图3至图8中涉及目的节点的处理过程和/或用于本申请所描述的技术的其他过程。存储器1540用于存储目的节点实现前述通信方法的程序代码和数据。
可以理解的是,图15仅仅示出了目的节点的简化设计。在实际应用中,
目的节点可以包含任意数量的发送器,接收器,处理器,控制器,存储器等,而所有可以实现本发明的目的节点都在本发明的保护范围之内。
进一步地,所述接收器1510还用于,接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据;
或者,
接收所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据;
或者,
接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据,和所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
进一步地,所述发送器1530还用于,当所述目的节点对所述第一数据正确译码时,向所述源节点和所述协作节点发送确认信号。
进一步地,所述接收器1510还用于,接收所述源节点发送的请求发送RTS信号,所述RTS信号包括第一协作请求信息;
所述发送器1530还用于,向所述源节点和第一节点发送允许发送CTS信号,所述CTS信号包括第二协作请求信息。
进一步地,所述CTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间、所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;
所述CTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间;
所述发送器1530具体用于,在所述第三预留时间内,向所述源节点以及
所述协作节点发送所述非确认信号或者所述确认信号。
进一步地,所述装置与所述协作节点之间使用第二通信链路进行通信;所述装置与所述源节点之间使用第三通信链路进行通信;
所述第二通信链路与所述第三通信链路处于不同的工作频段。
因此,通过应用本发明实施例提供的通信方法,所述装置在接收到源节点发送的第一数据后就开始译码,并根据译码结果,向协作节点和源节点发送确认信号或者非确认信号,当所述装置未对第一数据正确译码时,协作节点和源节点根据接收的非确认信号,停止向所述装置发送第一数据或者经过编码处理后的数据。由于在本发明实施例中,源节点、协作节点均是根据目的节点发送的信号,停止向目的节点重传/转发数据,节省了通信系统资源,避免了资源浪费。
另外,本发明实施例中图12所示的通信装置可设置在第一节点中,用以实现前述本发明实施例中的通信方法,如图16所示,所述第一节点包括:接收器1610、处理器1620、发送器1630以及存储器1640。接收器1610、处理器1620、发送器1630以及存储器1640通过总线1650相互连接;总线1650与前述实施例中的总线相同,在此不再复述。
处理器1620、存储器1640也与前述实施例中的处理器、存储器相同,在此不再复述。
在本发明实施中,处理器1620,用于判断接收器是否接收到源节点发送的请求发送RTS信号以及目的节点发送的允许发送CTS信号;
如果所述接收器接收到所述源节点发送的RTS信号,且接收到所述目的节点发送的CTS信号,则确定所述第一节点为候选协作节点。
处理器1620执行图3至图8中涉及第一节点的处理过程和/或用于本申请所描述的技术的其他过程。存储器1640用于存储第一节点实现前述通信方法的程序代码和数据。
可以理解的是,图16仅仅示出了第一节点的简化设计。在实际应用中,
第一节点可以包含任意数量的发送器,接收器,处理器,控制器,存储器等,而所有可以实现本发明的第一节点都在本发明的保护范围之内。
进一步地,所述处理器1620还用于,当所述RTS信号包括第一协作请求信息,且所述CTS信号包括第二协作请求信息时,确定所述第一节点为协作节点。
进一步地,所述处理器1620还用于,获取所述第一节点与所述源节点之间的第一信道质量值以及所述第一节点与所述目的节点之间的第二信道质量值;
判断所述第一信道质量值是否超过第一质量阈值,且所述第二信道质量值是否超过所述第二质量阈值;
如果所述第一信道质量值超过所述第一质量阈值,且所述第二信道质量值超过所述第二质量阈值,则确定所述第一节点为协作节点;
或者,
所述处理器1620还用于,当所述CTS信号包括所述目的节点与所述源节点之间的第三信道质量值时,判断所述第一信道质量值是否超过所述第三质量阈值,且所述第三质量值是否超过第四信道质量阈值;
如果所述第一信道质量值超过所述第三质量阈值,且所述第三信道质量值超过所述第四质量阈值,则确定所述第一节点为协作节点;
或者,
当所述CTS信号包括所述目的节点与所述源节点之间的第一路径时延时,确定所述第一节点与所述目的节点之间的第二路径时延;
根据所述第一路径时延和所述第二路径时延,判断所述第一路径时延与所述第二路径时延的差值是否不超过时延阈值;
如果所述第一路径时延与所述第二路径时延的差值不超过所述时延阈值,则确定所述第一节点为协作节点。
因此,通过应用本发明实施例提供的通信装置,所述装置根据源节点发
送的RTS信号和目的节点发送的CTS信号,以及RTS信号和CTS信号中包括的相关信息,判断自身是否可以成为协作节点,当自身可以成为协作节点时,参与至源节点和目的节点的通信中。实现了通过协作通信的传输可靠性提高增益,并且,避免了协作节点的多次转发操作所带来的时延增加和资源浪费的问题。
专业人员应该还可以进一步意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。
结合本文中所公开的实施例描述的方法或算法的步骤可以用硬件、处理器执行的软件模块,或者二者的结合来实施。软件模块可以置于随机存储器(RAM)、内存、只读存储器(ROM)、电可编程ROM、电可擦除可编程ROM、寄存器、硬盘、可移动磁盘、CD-ROM、或技术领域内所公知的任意其它形式的存储介质中。
以上所述的具体实施方式,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施方式而已,并不用于限定本发明的保护范围,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (38)
- 一种通信方法,其特征在于,所述方法包括:协作节点接收源节点发送的第一数据;当目的节点对所述第一数据正确译码时,所述协作节点接收所述目的节点发送的确认信号;根据所述确认信号,所述协作节点停止向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据。
- 根据权利要求1所述的通信方法,其特征在于,所述方法还包括:当所述目的节点未对所述第一数据正确译码时,所述协作节点接收所述目的节点发送的非确认信号;根据所述非确认信号,所述协作节点向所述目的节点转发所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的所述第二数据。
- 根据权利要求1或2所述的通信方法,其特征在于,所述协作节点与所述源节点之间使用第一通信链路进行通信;所述协作节点与所述目的节点之间使用第二通信链路进行通信;所述第一通信链路与所述第二通信链路处于不同的工作频段。
- 一种通信方法,其特征在于,所述方法包括:源节点向目的节点发送第一数据;当所述目的节点未对所述第一数据正确译码时,所述源节点接收所述目的节点发送的非确认信号;根据所述非确认信号,所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
- 根据权利要求4所述的通信方法,其特征在于,所述方法还包括:当所述目的节点对所述第一数据正确译码时,所述源节点接收所述目的节点发送的确认信号;根据所述确认信号,所述源节点停止向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据。
- 根据权利要求4所述的通信方法,其特征在于,所述当所述目的节点未对所述第一数据正确译码时,所述源节点接收所述目的节点发送的非确认信号之前,所述方法还包括:所述源节点向协作节点发送第一数据。
- 根据权利要求4所述的通信方法,其特征在于,所述源节点向目的节点发送第一数据之前,所述方法还包括:所述源节点向所述目的节点和第一节点发送请求发送RTS信号,所述RTS信号包括第一协作请求信息;所述源节点接收所述目的节点根据所述RTS信号发送的允许发送CTS信号,所述CTS信号包括第二协作请求信息。
- 根据权利要求7所述的通信方法,其特征在于,所述RTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间;所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据具体包括:在所述第一预留时间内,所述源节点向所述目的节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的所述第三数据。
- 根据权利要求7所述的通信方法,其特征在于,所述RTS信号还包括所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据 的第二预留时间;所述RTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间。
- 根据权利要求4至9任一项所述的通信方法,其特征在于,所述源节点与所述协作节点之间使用第一通信链路进行通信;所述源节点与所述目的节点之间使用第三通信链路进行通信;所述第一通信链路与所述第三通信链路处于不同的工作频段。
- 一种通信方法,其特征在于,所述方法包括:目的节点接收源节点发送的第一数据;所述目的节点对所述第一数据进行译码处理;当所述目的节点未对所述第一数据正确译码时,所述目的节点向所述源节点和协作节点发送非确认信号。
- 根据权利要求11所述的通信方法,其特征在于,所述方法还包括:所述目的节点接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据;或者,所述目的节点接收所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据;或者,所述目的节点接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据,和所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
- 根据权利要求11所述的通信方法,其特征在于,所述方法还包括:当所述目的节点对所述第一数据正确译码时,所述目的节点向所述源节点和所述协作节点发送确认信号。
- 根据权利要求11所述的通信方法,其特征在于,所述目的节点接收源节点发送的第一数据之前,所述方法还包括:所述目的节点接收所述源节点发送的请求发送RTS信号,所述RTS信号包括第一协作请求信息;根据所述RTS信号,所述目的节点向所述源节点和第一节点发送允许发送CTS信号,所述CTS信号包括第二协作请求信息。
- 根据权利要求14所述的通信方法,其特征在于,所述CTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间、所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;所述CTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间;所述目的节点向所述源节点和协作节点发送非确认信号或者确认信号,具体包括:在所述第三预留时间内,所述目的节点向所述源节点和所述协作节点发送所述非确认信号或者所述确认信号。
- 根据权利要求11至15所述的通信方法,其特征在于,所述目的节点与所述协作节点之间使用第二通信链路进行通信;所述目的节点与所述源节点之间使用第三通信链路进行通信;所述第二通信链路与所述第三通信链路处于不同的工作频段。
- 一种通信方法,其特征在于,所述方法包括:第一节点判断是否接收到源节点发送的请求发送RTS信号以及目的节点发送的允许发送CTS信号;如果所述第一节点接收到所述源节点发送的RTS信号,且接收到所述目的节点发送的CTS信号,则所述第一节点确定所述第一节点为候选协作节点。
- 根据权利要求17所述的通信方法,其特征在于,所述方法还包括:当所述RTS信号包括第一协作请求信息,且所述CTS信号包括第二协作请求信息时,作为所述候选协作节点的第一节点确定所述第一节点为协作节点。
- 根据权利要求17所述的通信方法,其特征在于,所述方法还包括:所述第一节点获取所述第一节点与所述源节点之间的第一信道质量值以及所述第一节点与所述目的节点之间的第二信道质量值;所述第一节点判断所述第一信道质量值是否超过第一质量阈值,且所述第二信道质量值是否超过第二质量阈值;如果所述第一信道质量值超过所述第一质量阈值,且所述第二信道质量值超过所述第二质量阈值,则作为所述候选协作节点的第一节点确定所述第一节点为协作节点;或者,当所述CTS信号包括所述目的节点与所述源节点之间的第三信道质量值时,所述第一节点判断所述第一信道质量值是否超过所述第三质量阈值,且所述第三质量值是否超过第四信道质量阈值;如果所述第一信道质量值超过所述第三质量阈值,且所述第三信道质量值超过所述第四质量阈值,则作为所述候选协作节点的第一节点确定所述第一节点为协作节点;或者,当所述CTS信号包括所述目的节点与所述源节点之间的第一路径时延时,所述第一节点确定所述第一节点与所述目的节点之间的第二路径时延;所述第一节点根据所述第一路径时延和所述第二路径时延,判断所述第一路径时延与所述第二路径时延的差值是否不超过时延阈值;如果所述第一路径时延与所述第二路径时延的差值不超过所述时延阈值,则作为所述候选协作节点的第一节点确定所述第一节点为协作节点。
- 一种通信装置,其特征在于,所述装置包括:接收单元,用于接收源节点发送的第一数据;所述接收单元还用于,当目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;发送单元,用于根据所述确认信号,停止向所述目的节点转发所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第二数据。
- 根据权利要求20所述的通信装置,其特征在于,所述接收单元还用于,当所述目的节点未对所述第一数据正确译码时,接收所述目的节点发送的非确认信号;所述发送单元还用于,根据所述非确认信号,向所述目的节点转发所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第二数据。
- 根据权利要求20或21所述的通信装置,其特征在于,所述装置与所述源节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第二通信链路进行通信;所述第一通信链路与所述第二通信链路处于不同的工作频段。
- 一种通信装置,其特征在于,所述装置包括:发送单元,用于向目的节点发送第一数据;接收单元,用于当所述目的节点未对所述第一数据正确译码时,接收所述目的节点发送的非确认信号;所述发送单元还用于,根据所述非确认信号,向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第三数据。
- 根据权利要求23所述的通信装置,其特征在于,所述接收单元还用于,当所述目的节点对所述第一数据正确译码时,接收所述目的节点发送的确认信号;所述发送单元还用于,根据所述确认信号,停止向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第三数据。
- 根据权利要求23所述的通信装置,其特征在于,所述发送单元还用于,向协作节点发送第一数据。
- 根据权利要求23所述的通信装置,其特征在于,所述发送单元还用于,向所述目的节点和第一节点发送请求发送RTS信号,所述RTS信号包括第一协作请求信息;所述接收节点还用于,接收所述目的节点根据所述RTS信号发送的允许发送CTS信号,所述CTS信号包括第二协作请求信息。
- 根据权利要求26所述的通信装置,其特征在于,所述发送单元发送的所述RTS信号还包括所述发送单元重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的第三数据的第一预留时间;所述发送单元具体用于,在所述第一预留时间内,向所述目的节点重传所述第一数据或者经过所述装置进行编码处理的包含所述第一数据信息的所述第三数据。
- 根据权利要求26所述的通信装置,其特征在于,所述发送单元发送的所述RTS信号还包括所述第一节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;所述发送单元发送的所述RTS信号还包括所述目的节点多次发送所述非确认信号或者所述确认信号的第三预留时间。
- 根据权利要求23至28任一项所述的通信装置,其特征在于,所述装置与所述协作节点之间使用第一通信链路进行通信;所述装置与所述目的节点之间使用第三通信链路进行通信;所述第一通信链路与所述第三通信链路处于不同的工作频段。
- 一种通信装置,其特征在于,所述装置包括:接收单元,用于接收源节点发送的第一数据;译码单元,用于对所述第一数据进行译码处理;发送单元,用于当所述译码单元未对所述第一数据正确译码时,向所述源节点和协作节点发送非确认信号。
- 根据权利要求30所述的通信装置,其特征在于,所述接收单元还用于,接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据;或者,接收所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据;或者,接收所述协作节点转发的所述第一数据或者经过所述协作节点进行编码处理的包含所述第一数据信息的第二数据,和所述源节点重传的所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据。
- 根据权利要求30所述的通信装置,其特征在于,所述发送单元还用于,当所述译码单元对所述第一数据正确译码时,向所述源节点和所述协作节点发送确认信号。
- 根据权利要求30所述的通信装置,其特征在于,所述接收单元还用于,接收所述源节点发送的请求发送RTS信号,所述RTS信号包括第一协作请求信息;所述发送单元还用于,根据所述RTS信号,向所述源节点和第一节点发送允许发送CTS信号,所述CTS信号包括第二协作请求信息。
- 根据权利要求33所述的通信装置,其特征在于,所述接收单元接收的所述RTS信号还包括所述源节点重传所述第一数据或者经过所述源节点进行编码处理的包含所述第一数据信息的第三数据的第一预留时间、所述第一 节点中作为协作节点的节点转发所述第一数据或者经过所述第一节点中作为协作节点的节点进行编码处理的包含所述第一数据信息的第二数据的第二预留时间;所述发送单元发送的所述CTS信号还包括所述发送单元多次发送所述非确认信号或者所述确认信号的第三预留时间;所述发送单元具体用于,在所述第三预留时间内,向所述源节点和所述协作节点发送所述非确认信号或者所述确认信号。
- 根据权利要求30至34所述的通信装置,其特征在于,所述装置与所述协作节点之间使用第二通信链路进行通信;所述装置与所述源节点之间使用第三通信链路进行通信;所述第二通信链路与所述第三通信链路处于不同的工作频段。
- 一种通信装置,其特征在于,所述装置包括:判断单元,用于判断是否接收到源节点发送的请求发送RTS信号以及目的节点发送的允许发送CTS信号;确定单元,用于如果所述第一节点接收到所述源节点发送的RTS信号,且接收到所述目的节点发送的CTS信号,则确定所述装置为候选协作节点。
- 根据权利要求36所述的通信装置,其特征在于,所述确定单元还用于,当所述RTS信号包括第一协作请求信息,且所述CTS信号包括第二协作请求信息时,确定所述装置为协作节点。
- 根据权利要求36所述的通信装置,其特征在于,所述装置还包括:获取单元,用于获取所述装置与所述源节点之间的第一信道质量值以及所述装置与所述目的节点之间的第二信道质量值;所述判断单元还用于,判断所述第一信道质量值是否超过第一质量阈值,且所述第二信道质量值是否超过第二质量阈值;所述确定单元还用于,如果所述第一信道质量值超过所述第一质量阈值,且所述第二信道质量值超过所述第二质量阈值,则确定所述装置为协作节点;或者,所述判断单元还用于,当所述CTS信号包括所述目的节点与所述源节点之间的第三信道质量值时,所述第一节点判断所述第一信道质量值是否超过所述第三质量阈值,且所述第三质量值是否超过第四信道质量阈值;所述确定单元还用于,如果所述第一信道质量值超过所述第三质量阈值,且所述第三信道质量值超过所述第四质量阈值,则确定所述装置为协作节点;或者,所述确定单元还用于,当所述CTS信号包括所述目的节点与所述源节点之间的第一路径时延时,确定所述装置与所述目的节点之间的第二路径时延;所述判断单元还用于,根据所述第一路径时延和所述第二路径时延,判断所述第一路径时延与所述第二路径时延的差值是否不超过时延阈值;所述确定单元还用于,如果所述第一路径时延与所述第二路径时延的差值不超过所述时延阈值,则确定所述装置为协作节点。
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