CN107094068A - The method and device that a kind of D2D sub-clusterings are retransmitted - Google Patents

The method and device that a kind of D2D sub-clusterings are retransmitted Download PDF

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Publication number
CN107094068A
CN107094068A CN201710265924.8A CN201710265924A CN107094068A CN 107094068 A CN107094068 A CN 107094068A CN 201710265924 A CN201710265924 A CN 201710265924A CN 107094068 A CN107094068 A CN 107094068A
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CN
China
Prior art keywords
mobile terminal
packet
clusters
cluster
base station
Prior art date
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Pending
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CN201710265924.8A
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Chinese (zh)
Inventor
任智
李秀峰
吕昱辉
王坤龙
王斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Tinno Wireless Technology Co Ltd
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Shenzhen Tinno Wireless Technology Co Ltd
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Priority to CN201710265924.8A priority Critical patent/CN107094068A/en
Publication of CN107094068A publication Critical patent/CN107094068A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message
    • 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
    • H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
    • 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
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/32—Connectivity information management, e.g. connectivity discovery or connectivity update for defining a routing cluster membership
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiments of the invention provide the method and device that a kind of D2D sub-clusterings are retransmitted, it is related to the communication technology.Wherein, this method includes：Mobile terminal sends in service requesting information, the service requesting information to base station and carries mobile terminal dump energy rank, geographical position；Then, D2D clusters are set up in base station according to the mobile terminal dump energy rank, geographical position；Secondly, base station broadcasts the cluster information of D2D clusters to mobile terminal, to cause node type of the acquisition for mobile terminal certainly in cluster in the D2D clusters；So as to which mobile terminal is according to the node type, it is performed in unison with corresponding data re-transmission with other mobile terminals in D2D clusters and acts.The technical scheme that the present invention is provided can solve the problem that the problem of control overhead is high, retransmission efficiency is low when D2D sub-clusterings in the prior art retransmit data.

Description

The method and device that a kind of D2D sub-clusterings are retransmitted
【Technical field】
The present invention relates to the communications field, more particularly to the method and device that a kind of D2D sub-clusterings are retransmitted.
【Background technology】
With developing rapidly for the communication technology, increasing mobile terminal is poured in network, and this is for frequency spectrum resource Using being consequently increased, but mobile terminal can with frequency spectrum resource it is extremely limited, realized for the utilization rate that improves frequency spectrum resource The close terminal intercommunication in position, D2D (device to device, terminal-to-terminal service) communications turn into one currently and ground Study carefully focus.
The selection for focusing on cluster head of the foundation of D2D clusters, traditional cluster-leader selected is typically based on node link, most Dalian Degree of connecing or minimum node mark tri- kinds of modes of ID.And it is recently proposed a kind of D2D sub-clustering multicasting methods based on positional information Mobile terminal in patent of invention, the patent in D2D regions sends out the geographical position of itself, transmission range and residual energy value Base station is given, selects the big mobile terminal of competition value to be used as by cluster-dividing method of the information based on geographical position wrapped on mobile terminal Cluster head, sets up D2D clusters.But the system of selection of this cluster head needs to increase the information capacity for the information that terminal is sent to base station, With enable dump energy value be carried in the information send, therefore add base station obtain mobile terminal link information when Control overhead.
Realize that the research and design of prior art is mainly cluster interior nodes and uses CSMA when being retransmitted in cluster using the D2D of foundation (Carrier Sense Multiple Access, carrier sense multiple access) or TDMA (Time division Multiple access, time division multiple acess access) mechanism sends the reception condition of packet to cluster head, and cluster head receives according to node The situation of packet sets up a feedback form, and the packet of re-transmission is encoded using network code according to feedback form, broadcast Coded data packet.The design retransmitted in this D2D clusters only participates in network code with cluster head, and the multicast transmission of packet can only be by cluster Head is performed, and the efficiency for causing many bags to retransmit is low, data retransmission cost is high.
【The content of the invention】
The embodiments of the invention provide the method and device that a kind of D2D sub-clusterings are retransmitted, D2D points in the prior art are can solve the problem that The problem of control overhead is high when cluster retransmits data, retransmission efficiency is low.
In a first aspect, a kind of method that D2D sub-clusterings are retransmitted, it is adaptable to which mobile terminal, methods described includes：
Send and mobile terminal dump energy rank, geographical position are carried in service requesting information, the service requesting information Put；
D2D cluster information is obtained, node type of the mobile terminal in D2D clusters is determined；
According to the node type, it is performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and acts.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the transmission industry Also include before carrying mobile terminal dump energy rank, geographical position in business solicited message, the service requesting information：
All energy values in the maximum energy value that the mobile terminal can be born to zero are average by descending order It is divided into some set；
For some set distribution energy ranks.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, send described Before service requesting information, in addition to：
Extract the residual energy value of the mobile terminal；
According to the residual energy value, corresponding energy rank is determined；
Then the transmission service requesting information includes：
According to the reserved bit in the energy rank configuration service solicited message；
Base station sends the service requesting information.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the acquisition D2D Cluster information, determines that type of the mobile terminal in D2D clusters includes：
Obtain the cluster message of base station broadcast, extract D2D cluster information, carry in the D2D clusters information D2D clusters ID, ID sequences after the ID of mobile terminal is arranged according to specified order in cluster；
ID sequences after being arranged according to the ID of mobile terminal in the cluster according to specified order, judge the mobile terminal Positions of the ID in the ID sequences；
When judging first places of the ID of the mobile terminal in the ID sequences, it is D2D to determine the mobile terminal Cluster head node in cluster；
When judging first places of the ID of the mobile terminal not in the ID sequences, determine that the mobile terminal is Ordinary node in D2D clusters.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, obtain D2D clusters letter Breath, determines also to include after node type of the mobile terminal in D2D clusters：
Receive the packet of base station broadcast；
Judge the packet whether be base station broadcast last packet；
If judgement is, at the time of record receives last described packet；
Determine that the moment sends the time zero that packet receives confirmation for mobile terminal.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the determination institute Stating to send after packet receives the time zero of confirmation for mobile terminal constantly includes：
Determine position of the mobile terminal in specified sequence；
Slot length according to needed for one packet in the position and default reception receives confirmation, determines institute At the time of stating mobile terminal transmission packet reception confirmation.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when one Gap length includes a protection time slot and mobile terminal sends a packet and receives confirmation required time.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, according to institute's rheme Put and the default slot length received needed for a packet reception confirmation, determine that the mobile terminal sends data Bag includes at the time of receiving confirmation：
When it is determined that n-th in the specified sequence of the mobile terminal, according to formula ts=tb+n×tg+(n-1)× taAt the time of calculating obtains other mobile terminals transmission packet reception confirmation corresponding with the position；
Wherein, tsFor ordinary node the time slot that packet receives confirmation is sent to cluster head node；tbReceived for packet At the time of completing correspondence；N is ordinary node position in specified sequence；tgThe time of default protection time slot；taFor default hair Send the time the need for packet reception confirmation.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when it is determined that described When mobile terminal is cluster head node in D2D clusters, it is performed in unison with corresponding re-transmission action with other mobile terminals in D2D clusters and wraps Include：
When it is determined that itself be not properly received packet after, inquiry is properly received in the corresponding D2D clusters of the packet it His mobile terminal；
Dump energy rank maximum is selected in other mobile terminals from being properly received in the corresponding D2D clusters of the packet Specify mobile terminal；
Judge other movements in packet and D2D clusters that can the specified mobile terminal need the mobile terminal The packet that terminal needs carries out network code；
If being judged as YES, send network code to the specified mobile terminal and notify, so that the specified mobile terminal enters Packet after row network code and broadcast code.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when it is determined that described When mobile terminal is ordinary node in D2D clusters, it is performed in unison with corresponding re-transmission action with other mobile terminals in D2D clusters and wraps Include：
When the packet that cluster head node is not properly received, the network volume that the corresponding mobile terminal of cluster head node is sent is received Code is notified；
To specifying packet to carry out network code；
Packet after broadcast code.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when it is determined that described When mobile terminal is cluster head node in D2D clusters, it is performed in unison with corresponding re-transmission action with other mobile terminals in D2D clusters and also wraps Include：
When detecting that mobile terminal is not properly received the packet of base station broadcast in cluster, the cluster head node is corresponding Mobile terminal sends HARQ information to base station；
Mobile terminal receives the packet in cluster.
Second aspect, the embodiments of the invention provide a kind of method that D2D sub-clusterings are retransmitted, it is adaptable to base station, methods described Including：
Obtain in the service requesting information that mobile terminal is sent, the service requesting information and carry mobile terminal residual energy Magnitude is other, geographical position；
D2D clusters are set up according to the mobile terminal dump energy rank, geographical position；
The cluster information of D2D clusters is broadcasted, to cause node class of the acquisition for mobile terminal certainly in cluster in the D2D clusters Type.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, it is described according to institute State mobile terminal dump energy rank, D2D clusters are set up in geographical position includes：
Mobile terminal is ranked up by the order of mobile terminal dump energy rank from big to small and obtains First ray；
Order by First ray according to geographical position with mobile terminal D2D clusters centre distance from the near to the remote is ranked up, Obtain the second sequence；
First corresponding mobile terminal for selecting the second sequence is cluster head node, other the corresponding movements of the second sequence Terminal is ordinary node.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the broadcast D2D The cluster information of cluster, make it that acquisition for mobile terminal also includes from after the node type in cluster in the D2D clusters：
According to the service requesting information, packet corresponding with the service requesting information is broadcasted.
The third aspect, the embodiments of the invention provide the device that a kind of D2D sub-clusterings are retransmitted, it is adaptable to mobile terminal, described Device includes：
Transmitting element, mobile terminal residual energy is carried for sending in service requesting information, the service requesting information Magnitude is other, geographical position；
Acquiring unit, for obtaining D2D cluster information, determines node type of the mobile terminal in D2D clusters；
Retransmission unit, for according to the node type, corresponding retransmit to be performed in unison with other mobile terminals in D2D clusters Action.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, described device is also Including：
Taxon, for all energy values in the maximum energy value to zero that can bear the mobile terminal by from big To small order, some set are divided into；
Allocation unit, for distributing energy ranks for some set.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, described device is also Including：
Extraction unit, the residual energy value for extracting the mobile terminal；
First determining unit, for according to the residual energy value, determining corresponding energy rank；
Then transmitting element includes：
Configuration module, for the reserved bit in the energy rank configuration service solicited message；
Sending module, for sending the service requesting information to base station.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the acquisition list Member includes：
Acquisition module, the cluster message for obtaining base station broadcast is extracted in D2D cluster information, the D2D clusters information and carried Have the ID of D2D clusters, the ID sequences after the ID of mobile terminal is arranged according to specified order in cluster；
Judge module, the ID sequences after being arranged for the ID according to mobile terminal in the cluster according to specified order judge Positions of the ID of the mobile terminal in the ID sequences；
First determining module, for when judging first places of the ID of the mobile terminal in the ID sequences, it is determined that The mobile terminal is the cluster head node in D2D clusters；
Second determining module, for when judging first places of the ID of the mobile terminal not in the ID sequences, really The fixed mobile terminal is the ordinary node in D2D clusters.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, described device is also Including：
Receiving unit, the packet for receiving base station broadcast；
Judging unit, for judge the packet whether be base station broadcast last packet；
Recording unit, if for judging it is at the time of recording to receive last described packet；
Second determining unit, for determining that the moment rises for the timing that mobile terminal sends packet reception confirmation Point.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, described device is also Including：
3rd determining unit, for determining position of the mobile terminal in specified sequence；
4th determining unit, needed for receiving confirmation according to one packet in the position and default reception Slot length, at the time of determining that the mobile terminal sends packet and receives confirmation.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when one Gap length includes a protection time slot and mobile terminal sends a packet and receives confirmation required time.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the 4th determines list Member includes：
Computing module, for when determining n-th of the mobile terminal in the specified sequence, according to formula ts=tb+ n×tg+(n-1)×taCalculate obtain corresponding with the position other mobile terminals send packet reception confirmation when Carve；
Wherein, tsFor ordinary node the time slot that packet receives confirmation is sent to cluster head node；tbReceived for packet At the time of completing correspondence；For ordinary node in specified sequence position；tgThe time of default protection time slot；taFor default hair Send the time the need for packet reception confirmation.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the re-transmission list Member includes：
Enquiry module, for when determine itself be not properly received packet after, inquiry be properly received the packet pair Other mobile terminals in the D2D clusters answered；
Selecting module, for remaining from selection in other mobile terminals is properly received in the corresponding D2D clusters of the packet The maximum specified mobile terminal of energy rank；
Judge module, for judge packet that can the specified mobile terminal need the mobile terminal and The packet that other mobile terminals need in D2D clusters carries out network code；
First sending module, if for being judged as YES, sending network code to the specified mobile terminal and notifying, so that institute State specified mobile terminal and carry out the packet after network code and broadcast code.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the re-transmission list Member includes：
First receiving module, for when the packet that cluster head node is not properly received, receiving, cluster head node is corresponding to be moved The network code that dynamic terminal is sent is notified；
Coding module, for specifying packet to carry out network code；
Broadcast module, for the packet after broadcast code.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, retransmission unit is also Including：
Second sending module, for when detecting that mobile terminal is not properly received the packet of base station broadcast in cluster, The corresponding mobile terminal of the cluster head node sends HARQ information to base station；
Second receiving module, the packet is received for mobile terminal in cluster.
Fourth aspect, the embodiments of the invention provide the device that a kind of D2D sub-clusterings are retransmitted, it is adaptable to base station, described device Including：
Carried in acquiring unit, the service requesting information for obtaining mobile terminal transmission, the service requesting information Mobile terminal dump energy rank, geographical position；
Unit is set up, for setting up D2D clusters according to the mobile terminal dump energy rank, geographical position；
First radio unit, the cluster information for broadcasting D2D clusters, make it that acquisition for mobile terminal is certainly in the D2D clusters Node type in cluster.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the foundation list Member includes：
First order module, for being arranged by the order of mobile terminal dump energy rank from big to small mobile terminal Sequence obtains First ray；
Second order module, for by First ray according to geographical position and mobile terminal D2D clusters centre distance by closely to Remote order is ranked up, and obtains the second sequence；
Selecting module, for select the second sequence first corresponding mobile terminal be cluster head node, the second sequence its The corresponding mobile terminal in his position is ordinary node.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, described device is also Including：
Second radio unit, for according to the service requesting information, broadcasting number corresponding with the service requesting information According to bag.
Compared in above-mentioned technical proposal with prior art, had the advantages that：
Technical scheme provided in an embodiment of the present invention, base station obtains dump energy rank, the geographical position that mobile terminal is sent Put, D2D clusters are set up according to the dump energy rank of each mobile terminal and geographical position, base station is broadcasted to each mobile terminal The cluster information of D2D clusters, mobile terminal determines node type of the mobile terminal in D2D clusters, root according to D2D cluster information According to node type, it is performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and acts.Compared to base station root in the prior art According to the cluster head node correspondence in the residual energy value of the mobile terminal got or the geographical location choice D2D clusters of mobile terminal Mobile terminal, set up D2D clusters, re-transmission action, the technical scheme that provides of the present invention then performed by the cluster head node in D2D clusters Dump energy rank and geographical position of the base station based on mobile terminal, the corresponding mobile terminal of selection cluster head node, set up D2D The method of cluster can promote the energy-consuming balance of the mobile terminal in D2D clusters, extend the network life of D2D clusters, while base station is obtained The dump energy rank rather than residual energy value of mobile terminal, so as to effectively reduction control overhead；In addition, mobile terminal root According to other mobile terminal co-operatings in the node type of itself, with D2D clusters, realize the corresponding mobile terminal of cluster head node with it is general Lead to the corresponding mobile terminal of node to coordinate, by the corresponding mobile terminal of cluster head node and/or the corresponding mobile terminal of ordinary node Mobile terminal executing data retransmission into cluster, so as to reduce the number of times of data packet retransmission, improves retransmission efficiency.Therefore, this hair The technical scheme of bright offer can solve the problem that when D2D sub-clusterings in the prior art retransmit data that control overhead is high, retransmission efficiency is low and ask Topic.
【Brief description of the drawings】
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this area For those of ordinary skill, without having to pay creative labor, it can also be obtained according to these accompanying drawings other attached Figure.
Fig. 1 is a kind of structural representation of D2D clusters multicast system provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet for the method that a kind of D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Fig. 3 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Fig. 4 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Fig. 5 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Fig. 6 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Fig. 7 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Fig. 8 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Fig. 9 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 10 is the schematic flow sheet for the method that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 11 is the schematic flow sheet for the method that a kind of D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 12 is the schematic flow sheet for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 13 is the schematic flow sheet for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 14 is the schematic flow sheet for the device that a kind of D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 15 is the structural representation for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 16 is the structural representation for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 17 is the structural representation for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 18 is the structural representation for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted.
Figure 19 is the structural representation for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 20 is the structural representation for the device that a kind of D2D sub-clusterings provided in an embodiment of the present invention are retransmitted；
Figure 21 is the structural representation for the device that another D2D sub-clusterings provided in an embodiment of the present invention are retransmitted.
【Embodiment】
In order to be better understood from technical scheme, the embodiment of the present invention is retouched in detail below in conjunction with the accompanying drawings State.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its Its embodiment, belongs to the scope of protection of the invention.
The term used in embodiments of the present invention is the purpose only merely for description specific embodiment, and is not intended to be limiting The present invention." one kind ", " described " and "the" of singulative used in the embodiment of the present invention and appended claims It is also intended to including most forms, unless context clearly shows that other implications.
Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ... When " or " in response to determining " or " in response to detection ".Similarly, depending on linguistic context, phrase " if it is determined that " or " if detection (condition or event of statement) " can be construed to " when it is determined that when " or " in response to determine " or " when the detection (condition of statement Or event) when " or " in response to detection (condition or event of statement) ".
The method that D2D sub-clusterings set forth in the present invention are retransmitted is divided into 3 stages, is respectively：D2D clusters establishment stage, data Multicast stage, data retransmission phase.Wherein, in following embodiments, mobile terminal before step 102 (including step 102) is held Operation of the step 301 that capable method flow and base station are performed to 303 operations performed by D2D cluster establishment stages；Step 201 Data broadcasting is described to step 204 and step 304, step 205 to step 206 and step 103 describe data Retransmission phase.
Fig. 1 is performs the D2D cluster multicast systems in above three stage, and the system includes eNB, and (evolved Node B, are drilled Enter type base station), CH (Cluster Head, cluster head node), CM (Cluster Member, bunch member node).
The embodiments of the invention provide a kind of method that D2D sub-clusterings are retransmitted, it is adaptable to mobile terminal, the flow chart of this method As shown in Fig. 2 method includes：
Wherein, the mobile terminal can include but is not limited to personal computer (Personal Computer, PC), individual Digital assistants (Personal Digital Assistant, PDA), radio hand-held equipment, tablet personal computer (Tablet Computer), mobile phone, MP3 player, MP4 players etc..
101st, send service requesting information, carry in the service requesting information mobile terminal dump energy rank, Manage position.
Wherein, the service requesting information includes data and control information of the mobile terminal to base station requests.
Wherein, dump energy rank is a kind of identification information for reflecting mobile terminal dump energy, on dump energy Method is specifically defined, is described in detail in subsequent implementation, be will not be described in great detail herein.
102nd, D2D cluster information is obtained, node type of the mobile terminal in D2D clusters is determined.
Wherein, carried in D2D clusters information mobile terminal in the ID and cluster of D2D clusters according to dump energy rank and Status position is according to the ID sequences after the arrangement of specified order.
Wherein, the ID of D2D clusters is a kind of identity of D2D clusters, for being made a distinction to the D2D clusters in base station.
By judging positions of the mobile terminal ID in the ID sequences after arranging in a designated order, node type is determined. When the ID of the terminal is in the first place of the ID sequences, it is determined that the node type of the mobile terminal is cluster head node；When the terminal ID not in the first place of the ID sequences, it is determined that the node type of the mobile terminal be ordinary node
103rd, according to the node type, it is performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and acts.
Wherein, mobile terminal co-operating refers to the situation that packet is properly received according to each mobile terminal, cluster in cluster The corresponding mobile terminal of first node mobile terminal corresponding with ordinary node, which coordinates, performs corresponding re-transmission action.
Specifically, when cluster head node is not properly received packet, and ordinary node is properly received, then cluster head node is notified The corresponding mobile terminal of the ordinary node for being properly received packet carries out network code, corresponding mobile whole by the ordinary node End directly retransmits packet；Or, when the corresponding mobile terminal of cluster head node is properly received packet, but other mobile terminals are not Packet is properly received, data packet retransmission is carried out by the corresponding mobile terminal of cluster head node；Or, mobile terminal is not in cluster When having correctly received some packets, the corresponding mobile terminal of cluster head node retransmits the packet to base station requests.
The embodiments of the invention provide a kind of method that D2D sub-clusterings are retransmitted, base station obtains the residual energy that mobile terminal is sent Magnitude not, geographical position, D2D clusters are set up according to the dump energy rank of each mobile terminal and geographical position, base station is to each Individual mobile terminal broadcasts the cluster information of D2D clusters, and mobile terminal determines the mobile terminal in D2D clusters according to D2D cluster information Node type, according to node type, be performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and act.Compared to existing There is in technology base station according in the residual energy value of the mobile terminal got or the geographical location choice D2D clusters of mobile terminal The corresponding mobile terminal of cluster head node, set up D2D clusters, then by D2D clusters cluster head node perform re-transmission action, the present invention Dump energy rank and geographical position of the technical scheme base station of offer based on mobile terminal, selection cluster head node is corresponding to be moved Dynamic terminal, the energy-consuming balance of the mobile terminal in D2D clusters can be promoted by setting up the method for D2D clusters, extend the network longevity of D2D clusters Life, while base station obtains the dump energy rank rather than residual energy value of mobile terminal, so as to effectively reduction control overhead； In addition, node type of the mobile terminal according to itself, with other mobile terminal co-operatings in D2D clusters, realizes cluster head node pair The mobile terminal answered mobile terminal corresponding with ordinary node coordinates, by the corresponding mobile terminal of cluster head node and/or common section Mobile terminal executing data retransmission of the corresponding mobile terminal of point into cluster, so as to reduce the number of times of data packet retransmission, improves weight Transfer efficiency.Therefore, the technical scheme that the present invention is provided can solve the problem that control overhead when D2D sub-clusterings in the prior art retransmit data It is high, the problem of retransmission efficiency is low.
Further, the energy information of mobile terminal is in being stored with the progress of specific energy value, above-mentioned to realize Operation, reflects energy information with energy rank, the embodiments of the invention provide a kind of implementation method, as shown in figure 3, mobile whole End is sent before mobile terminal dump energy rank, geographical position are carried in service requesting information, the service requesting information, Also include：
104th, all energy values in the maximum energy value that can bear the mobile terminal to zero are by descending order, It is divided into several set.
Where it is assumed that the maximum energy value that mobile terminal can be born is X, energy value is 0 to all energy value structures between X Into the interval of one [0, X], according to the size of energy value, this interval is divided into m segment, for example, will [0, X] segment be divided into (0.75X, X], (0.5X, 0.75X], (0.75X, X], (0.25X, 0.5X], (0,0.25X] 4 intervals Section.
105th, it is several described set distribution energy ranks.
Wherein, energy rank is represented with the binary number of specified bytes length.For example, energy rank is used for one Length is the binary number representation of 2 bits.With reference to the applicating example of step 104, to the average mark of energy value interval [0, X] Into 4 be segment after, to this 4 set distribute specified bytes length binary number be：(0.75X, X] energy in segment The corresponding energy rank of value is 11, (0.5X, 0.75X] the corresponding energy rank of energy value in segment is 10, (0.75X, X] the corresponding energy rank of energy value in segment is 01, (0.25X, 0.5X], (0,0.25X] energy value pair in segment The energy rank answered is 00.It should be noted that characterizing, the other binary number of energy level is bigger, and expression energy rank is higher.I.e. Binary number is 11 corresponding energy rank highests in the above example, next to that binary number is 10 corresponding energy ranks, It is that binary number is 01 corresponding energy rank again, binary number is that 00 corresponding energy rank is minimum.
Be worth it is clear that, the present invention for energy value distribution set number and represent energy level other two enter The digit of number processed is not limited, but needs to ensure the set of energy value distribution with representing that the other binary number of energy level is present one by one Corresponding relation.
Further, with reference to foregoing schemes, in order to realize mobile terminal by remaining energy information with simple energy level Other form is sent to base station, the embodiments of the invention provide a kind of implementation, before the transmission service requesting information, Also need to perform following steps, the schematic flow sheet of this method is as shown in figure 4, specifically include：
106th, the residual energy value of the mobile terminal is extracted.
Wherein, residual energy value is the current electricity of battery of mobile terminal.
107th, according to the residual energy value, corresponding energy rank is determined.
After residual energy value is extracted, by the maximum energy value and most of the residual energy value respectively with each set Small energy value compares, when the residual energy value is more than the minimum energy value of a set, while less than or equal to the maximum of the set During energy value, so that it is determined that the residual energy value is in the set, by determining the corresponding energy rank of the set, and then determine The corresponding energy rank of the residual energy value.
When it is determined that mobile terminal dump energy rank after, be directed to step 101 send service requesting information specific behaviour Work includes：
1011st, the reserved bit in the energy rank configuration service solicited message.
In a communication network, the information that equipment is sent is sent as a data frame, and mobile terminal is by control information And data are carried in the corresponding function digit of data frame, these control information and data are encapsulated in a data frame.
Due to that can reserve the reserved bit of some undefined any functions in the design encapsulation of data frame, mobile terminal passes through The reserved bit in the frame head of the data frame sent to base station is searched, and the number of the reserved bit is more than or equal to expression energy level During the byte digit of other binary number, what the frame head that the corresponding energy rank of residual energy value is carried on into the data frame was included In reserved bit.
It should be noted that can be according to the specific of network for carrying the other information of the corresponding energy level of residual energy value Condition is determined.
Specifically, the energy rank for assuming mobile terminal is the binary number that length is 2bit, when mobile terminal is in LTE When in (Long Term Evolution, Long Term Evolution) network system, mobile terminal finds the mobile terminal and sent to base station MAC (Media Access Control, media access control) layer PDU (Protocol Data Unit, protocol data list Member) the frame head portion of frame includes 2 reserved bits, then the corresponding energy rank of dump energy is carried in the reserved bit.
Table 1 is the frame header format of MAC layer PDU frames.Wherein, the position where the R in table is reserved bit.
The form of the frame head of the LTE system MAC layer PDU frames of table 1
Or, it is assumed that the energy rank of mobile terminal is the binary number that length is 2bit, and mobile terminal finds the shifting IP (Internet Protocol, network communication protocol) Address Header that dynamic terminal is sent to base station includes 3 reserved bits, then The corresponding energy rank of dump energy is carried in any 2 reserved bits in 3 reserved bits.
Or, mobile terminal finds TCP (the Transmission Control that the mobile terminal is sent to base station Protocol, transmission control protocol) protocol headers include 6 reserved bits, then the corresponding energy rank of dump energy are carried on In any 2 reserved bits in 6 reserved bits.
1012nd, the service requesting information is sent to base station.
Geographical position is carried on mode in service requesting information and prior art by supplementary notes, mobile terminal Carrying mode is identical, and the present invention is repeated no more for this process.
In this embodiment, mobile terminal extracts the corresponding energy rank of residual energy value by determining, by energy level In the reserved bit for not being carried on the service requesting information sent to base station, compared in the prior art by increasing service request letter The length of breath, residual energy value is carried in the service requesting information sent to base station, and the technical scheme that the present invention is provided exists In the case of not changing message length, dump energy information is sent to base station, so as to effectively reduce the process of D2D sub-clusterings re-transmission In control overhead.
Further, with reference to foregoing schemes, to realize mobile terminal clearly from the node type in D2D clusters, this hair Bright embodiment provides another implementation method, and the flow chart of this method is as shown in figure 5, step 102 obtains D2D cluster information, really The concrete operations of fixed type of the mobile terminal in D2D clusters include：
1021st, the cluster message of base station broadcast is obtained, D2D cluster information is extracted.
It should be noted that this specify order for all mobile terminals in D2D clusters according to dump energy rank from high to low Order arrangement, when the dump energy rank that there is two or more mobile terminal is identical, these are remaining Energy rank identical mobile terminal is according still further to geographical position apart from the center of the D2D clusters from closely to remote order progress Arrangement, so as to obtain the ID sequences after being arranged according to specified order.
1022nd, the ID sequences after being arranged according to the ID of mobile terminal in the cluster according to specified order, judge the movement Positions of the ID of terminal in the ID sequences.
1023rd, when judging first places of the ID of the mobile terminal in the ID sequences, the mobile terminal is determined For the cluster head node in D2D clusters.
1024th, when judging first places of the ID of the mobile terminal not in the ID sequences, determine described mobile whole Hold as the ordinary node in D2D clusters.
Further, with reference to above method flow, to realize that the cluster head node in cluster is corresponding with ordinary node mobile whole End coordinates the re-transmission for performing packet, the present invention example another implementation, its method flow diagram are provided as shown in fig. 6, D2D cluster information is obtained, after determining node type of the mobile terminal in D2D clusters, in addition to：
201st, the packet of base station broadcast is received.
202nd, judge the packet whether be base station broadcast last packet.
Wherein, mobile terminal is likely to be received one packet of base station broadcast, it is also possible to receive the multiple of base station broadcast Packet, in order to ensure that mobile terminal can receive the entire packet of base station broadcast, bag of the base station in the packet of broadcast Head increases should in the field for indicating whether follow-up packet, the packet header that mobile terminal passes through the packet for judging to receive Content in field, whether be last packet, when judging that currently received packet is not last if determining the packet One packet, has been performed after the judgment step, will continue executing with step 201, until it is determined that the packet received is last Individual packet；After currently received packet is judged for last packet, determine that mobile terminal is near completion packet Reception, be ready for sending packet receive confirmation.
It is if the 203, judging, at the time of record receives last described packet.
204th, determine that the moment sends the time zero that packet receives confirmation for mobile terminal.
Furthermore, it is understood that packet during transmission because the unstable of network causes packet packet loss, based on this, The embodiments of the invention provide a kind of implementation, determining that the moment is mobile terminal transmission packet described in step 204 Receive confirmation time zero after, in addition it is also necessary to perform step 205,206, its realize method flow diagram as shown in fig. 7, Step 205 and step 206 are described in detail below：
205th, position of the mobile terminal in specified sequence is determined.
Wherein, the mobile terminal that specified sequence is used to indicate in D2D clusters sends the order that packet receives confirmation message, should Specified sequence is carried in the cluster information that base station is sent to mobile terminal, therefore, mobile terminal after cluster information is got, The specified sequence is obtained by parsing the cluster information.
It should be noted that in order to avoid the information content carried in cluster information is excessive, reducing the expense of information control, carrying High mobile terminal carries out the speed of information exchange with base station, therefore, and the specified sequence is according to specified in embodiments of the present invention The corresponding mobile terminal sequence of tactic ID sequences.
206th, the slot length according to needed for one packet in the position and default reception receives confirmation, really At the time of the fixed mobile terminal sends packet reception confirmation.
Wherein, a slot length includes a protection time slot and mobile terminal sends a packet and receives confirmation letter The time required to breath.
Wherein, it is that can reflect whether mobile terminal is properly received the data of base station transmission that the packet, which receives confirmation, Wrap and with the presence or absence of the configured information of packet loss.
According to formula ts=tb+n×tg+(n-1)×taCalculate and obtain other mobile terminals transmission corresponding with the position At the time of packet receives confirmation.
Wherein, tsFor ordinary node the time slot that packet receives confirmation is sent to cluster head node；tbReceived for packet At the time of completing correspondence；N is ordinary node position in specified sequence；tgThe time of default protection time slot；taFor default hair Send the time the need for packet reception confirmation.
Supplementary notes, at the time of arrival transmission packet reception confirmation is detected, ordinary node pair in cluster The mobile terminal answered sends packet to cluster head node correspondence mobile terminal and receives confirmation, to cause cluster head node corresponding The packet that mobile terminal is sent according to the corresponding mobile terminal of each ordinary node receives confirmation and sets up packet reception Feedback form；At the time of detection, which does not reach transmission packet, receives confirmation, into wait state.
By determining position of the mobile terminal in specified sequence, then calculated and sent according to the position in specified sequence At the time of packet receives confirmation, confirmed with realizing that each mobile terminal sends packet and received according to specified sequence order Information, so as to realize TDMA's in the case of base station and the corresponding mobile terminal of cluster head node not time slot assignment messages Information sender formula, and then realization avoids information collision, reduction control overhead and time overhead.
Further, for during different node type, have in D2D clusters when performing packet weight it is different perform action, Based on this, the embodiment of the present invention according to mobile terminal in D2D cluster interior joint types, for step 103 according to node type, with Other mobile terminals are performed in unison with corresponding re-transmission action and provide two kinds of implementations in D2D clusters.
The first implementation, as shown in figure 8, when it is determined that the mobile terminal is cluster head node in D2D clusters, with Other mobile terminals, which are performed in unison with corresponding re-transmission action, in D2D clusters includes：
1031st, when it is determined that itself be not properly received packet after, inquiry be properly received the corresponding D2D clusters of the packet Other interior mobile terminals.
Wherein, the corresponding mobile terminal of cluster head node is set up according to the situation of the received data packet of other each mobile terminals One packet feedback form, the mobile terminal determines what itself was not properly received according to the content recorded in the packet feedback form Packet, while inquiring about the mobile terminal for being properly received the packet according to the feedback form.
It should be noted that the form of the packet feedback form and the method for foundation are same as the prior art, herein not It is unnecessary again.
1032nd, from being properly received in the corresponding D2D clusters of the packet in other mobile terminals selection dump energy rank Maximum specified mobile terminal.
1033rd, it is judged in packet and D2D clusters that can the specified mobile terminal need the mobile terminal The packet that his mobile terminal needs carries out network code.
Wherein, the packet that mobile terminal needs is the packet that the mobile terminal is not properly received.
If the 1034, being judged as YES, send network code to the specified mobile terminal and notify, so that described specified mobile whole End carries out the packet after network code and broadcast code.
It should be noted that it is fairly perfect for network coding technique development in the prior art, in order to save research cost, The network code of mobile terminal continues to use network coding technique of the prior art in the embodiment of the present invention.
In the embodiment, the mechanism of a kind of " total involvement network code " is proposed, the corresponding mobile terminal of cluster head node leads to Cross and specify mobile terminal to send network code notice into cluster so that this specifies mobile terminal to participate in network code, and is referred to by this Mobile terminal is determined to the packet after cluster head node and the corresponding mobile terminal broadcast code of other nodes, so that what is simplified shows Have in technology and first obtain the packet needed from cluster head node to ordinary node, then again by the corresponding mobile terminal of cluster head node Network code is carried out, then by the retransmission processes of the corresponding mobile terminal broadcast code packet of cluster head node, data are reduced Bag transport overhead.
Second of implementation, as shown in figure 9, when it is determined that the mobile terminal is ordinary node in D2D clusters, with Other mobile terminals, which are performed in unison with corresponding re-transmission action, in D2D clusters includes：
1035th, when the packet that cluster head node is not properly received, receive what the corresponding mobile terminal of cluster head node was sent Network code is notified.
1036th, to specifying packet to carry out network code.
1037th, the packet after broadcast code.
Furthermore, it is understood that when mobile terminal is not properly received the packet of base station broadcast in cluster, for such a situation, The embodiments of the invention provide a kind of solution, the flow chart of this method is as shown in Figure 10, when it is determined that the mobile terminal exists When being cluster head node in D2D clusters, being performed in unison with corresponding re-transmission action with other mobile terminals in D2D clusters also includes：
1038th, when detecting that mobile terminal is not properly received the packet of base station broadcast in cluster, the cluster head node Corresponding mobile terminal sends HARQ information to base station.
1039th, mobile terminal receives the packet in cluster.
Mobile terminal is after the reception of this packet is completed in supplementary notes, D2D clusters, in addition it is also necessary to send data Bag receives confirmation, so that the corresponding mobile terminal to update packet of cluster head node receives feedback form, continues executing with corresponding Operation, until mobile terminal is all properly received the packet in cluster.
The embodiment of the present invention provides the example a kind of method that D2D sub-clusterings are retransmitted, it is adaptable to base station, this method flow chart such as Figure 11 Shown, methods described includes：
301st, in the service requesting information that acquisition mobile terminal is sent, the service requesting information mobile terminal is carried to remain Complementary energy rank, geographical position.
302nd, D2D clusters are set up according to the mobile terminal dump energy rank, geographical position.
The data for the mobile terminal request that base station is included according to service requesting information first, it is determined that asking the shifting of same data Dynamic terminal, the mobile terminal during secondly the geographical position according to where these terminals is determined in the range of communicating with one another determines this Mobile terminal in the range of communicating with one another may be constructed D2D clusters a bit, and right base station is according to the residual energy magnitude of the mobile terminal Other and geographical position, selects out position closest to the D2D clusters center from the highest-ranking mobile terminal of dump energy Mobile terminal as D2D clusters cluster head node, so as to complete the foundation of D2D clusters.
303rd, the cluster information of D2D clusters is broadcasted, to cause node of the acquisition for mobile terminal certainly in cluster in the D2D clusters Type.
Technical scheme provided in an embodiment of the present invention, base station obtains dump energy rank, the geographical position that mobile terminal is sent Put, D2D clusters are set up according to the dump energy rank of each mobile terminal and geographical position, base station is broadcasted to each mobile terminal The cluster information of D2D clusters, mobile terminal determines node type of the mobile terminal in D2D clusters, root according to D2D cluster information According to node type, it is performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and acts.Compared to base station root in the prior art According to the cluster head node correspondence in the residual energy value of the mobile terminal got or the geographical location choice D2D clusters of mobile terminal Mobile terminal, set up D2D clusters, re-transmission action, the technical scheme that provides of the present invention then performed by the cluster head node in D2D clusters Dump energy rank and geographical position of the base station based on mobile terminal, the corresponding mobile terminal of selection cluster head node, set up D2D The method of cluster can promote the energy-consuming balance of the mobile terminal in D2D clusters, extend the network life of D2D clusters, while base station is obtained The dump energy rank rather than residual energy value of mobile terminal, so as to effectively reduction control overhead；In addition, mobile terminal root According to other mobile terminal co-operatings in the node type of itself, with D2D clusters, realize the corresponding mobile terminal of cluster head node with it is general Lead to the corresponding mobile terminal of node to coordinate, by the corresponding mobile terminal of cluster head node and/or the corresponding mobile terminal of ordinary node Mobile terminal executing data retransmission into cluster, so as to reduce the number of times of data packet retransmission, improves retransmission efficiency.Therefore, this hair The technical scheme of bright offer can solve the problem that when D2D sub-clusterings in the prior art retransmit data that control overhead is high, retransmission efficiency is low and ask Topic.
Further, step 302 is directed to according to the mobile terminal dump energy rank, geographical position based on foregoing schemes The realization of D2D clusters is set up, the present invention implements to provide a kind of implementation, and as shown in figure 12, step 301 is specifically included：
3021st, mobile terminal is ranked up by the order of mobile terminal dump energy rank from big to small and obtains the first sequence Row.
3022nd, First ray is carried out according to the order of geographical position and mobile terminal D2D clusters centre distance from the near to the remote Sequence, obtains the second sequence.
3023rd, first corresponding mobile terminal of the second sequence of selection is cluster head node, other positions of the second sequence correspondence Mobile terminal be ordinary node.
Further, with reference to foregoing schemes, the embodiments of the invention provide another implementation, as shown in figure 13, The cluster information of D2D clusters is broadcasted, make it that acquisition for mobile terminal is also wrapped from after the node type in cluster in the D2D clusters Include：
304th, according to the service requesting information, packet corresponding with the service requesting information is broadcasted.
When all data of mobile terminal request can be encapsulated in a packet, base station only need to once be broadcasted；If All data of mobile terminal request can not be encapsulated in a packet, and the data of mobile terminal request are cut into many by base station Individual data, and these data are individually enclosed in different packets, these packets are then broadcasted successively.
The method provided based on above-described embodiment, the embodiment of the present invention provides the example method that another D2D sub-clusterings are retransmitted, should As shown in figure 14, this method includes the flow chart of method：
401st, mobile terminal sends service requesting information to base station.
Wherein, mobile terminal dump energy rank, geographical position are carried in the service requesting information.
402nd, D2D clusters are set up in base station according to the mobile terminal dump energy rank, geographical position.
403rd, the cluster information of base station broadcast D2D clusters, make it that acquisition for mobile terminal is from cluster in the D2D clusters Node type.
404th, mobile terminal is performed in unison with corresponding weight according to the node type of itself with other mobile terminals in D2D clusters Transmission is made.
Unspecified content refer to the related description in above-described embodiment in the embodiment of the present invention, no longer detailed herein Carefully repeat.
The method that the D2D sub-clusterings provided with reference to above-described embodiment are retransmitted, the embodiments of the invention provide a kind of D2D sub-clusterings weight The device of biography, it is adaptable to mobile terminal, as shown in figure 15, the device includes the structural representation of the device：
Transmitting element 51, mobile terminal residue is carried for sending in service requesting information, the service requesting information Energy rank, geographical position.
Acquiring unit 52, for obtaining D2D cluster information, determines node type of the mobile terminal in D2D clusters.
Retransmission unit 53, for according to the node type, corresponding weight to be performed in unison with other mobile terminals in D2D clusters Transmission is made.
Optionally, as shown in figure 16, the device also includes：
Taxon 54, for all energy values in the maximum energy value to zero that can bear the mobile terminal by from Small order is arrived greatly, is divided into some set.
Allocation unit 55, for distributing energy ranks for some set.
Optionally, as shown in figure 17, the device also includes：
Extraction unit 56, the residual energy value for extracting the mobile terminal.
First determining unit 57, for according to the residual energy value, determining corresponding energy rank.
Then transmitting element 51 includes：
Configuration module, for the reserved bit in the energy rank configuration service solicited message.
Sending module, for sending the service requesting information to base station.
Optionally, the acquiring unit 52 includes：
Acquisition module, the cluster message for obtaining base station broadcast is extracted in D2D cluster information, the D2D clusters information and carried There is the ID of mobile terminal in the ID of D2D clusters, cluster according to the ID sequences after the arrangement of specified order.
Judge module, the ID sequences after being arranged for the ID according to mobile terminal in the cluster according to specified order judge Positions of the ID of the mobile terminal in the ID sequences.
First determining module, for when judging first places of the ID of the mobile terminal in the ID sequences, it is determined that The mobile terminal is the cluster head node in D2D clusters.
Second determining module, for when judging first places of the ID of the mobile terminal not in the ID sequences, really The fixed mobile terminal is the ordinary node in D2D clusters.
Optionally, as shown in figure 18, the device also includes：
Receiving unit 58, the packet for receiving base station broadcast.
Judging unit 59, for judge the packet whether be base station broadcast last packet.
Recording unit 60, if for judging it is at the time of recording to receive last described packet.
Second determining unit 61, for determining that the moment sends the timing of packet reception confirmation for mobile terminal Starting point.
Optionally, as shown in figure 19, the device also includes：
3rd determining unit 62, for determining position of the mobile terminal in specified sequence.
4th determining unit 63, for receiving confirmation institute according to one packet in the position and default reception The slot length needed, at the time of determining that the mobile terminal sends packet reception confirmation.
Wherein, one slot length includes a protection time slot and mobile terminal sends a packet and receives true The time required to recognizing information.
Optionally, the 4th determining unit 63 includes：
Computing module, for when determining n-th of the mobile terminal in the specified sequence, according to formula ts=tb+ n×tg+(n-1)×taCalculate obtain corresponding with the position other mobile terminals send packet reception confirmation when Carve.
Wherein, tsFor ordinary node the time slot that packet receives confirmation is sent to cluster head node；tbReceived for packet At the time of completing correspondence；N is ordinary node position in specified sequence；tgThe time of default protection time slot；taFor default hair Send the time the need for packet reception confirmation.
Optionally, the retransmission unit 53 includes：
Enquiry module, for when determine itself be not properly received packet after, inquiry be properly received the packet pair Other mobile terminals in the D2D clusters answered.
Selecting module, for remaining from selection in other mobile terminals is properly received in the corresponding D2D clusters of the packet The maximum specified mobile terminal of energy rank.
Judge module, for judge packet that can the specified mobile terminal need the mobile terminal and The packet that other mobile terminals need in D2D clusters carries out network code.
First sending module, if for being judged as YES, sending network code to the specified mobile terminal and notifying, so that institute State specified mobile terminal and carry out the packet after network code and broadcast code.
Optionally, the retransmission unit 53 includes：
First receiving module, for when the packet that cluster head node is not properly received, receiving, cluster head node is corresponding to be moved The network code that dynamic terminal is sent is notified.
Coding module, for specifying packet to carry out network code.
Broadcast module, for the packet after broadcast code.
Optionally, the retransmission unit 53 also includes：
Second sending module, for when detecting that mobile terminal is not properly received the packet of base station broadcast in cluster, The corresponding mobile terminal of the cluster head node sends HARQ information to base station.
Second receiving module, the packet is received for mobile terminal in cluster.
Technical scheme provided in an embodiment of the present invention, base station obtains dump energy rank, the geographical position that mobile terminal is sent Put, D2D clusters are set up according to the dump energy rank of each mobile terminal and geographical position, base station is broadcasted to each mobile terminal The cluster information of D2D clusters, mobile terminal determines node type of the mobile terminal in D2D clusters, root according to D2D cluster information According to node type, it is performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and acts.Compared to base station root in the prior art According to the cluster head node correspondence in the residual energy value of the mobile terminal got or the geographical location choice D2D clusters of mobile terminal Mobile terminal, set up D2D clusters, re-transmission action, the technical scheme that provides of the present invention then performed by the cluster head node in D2D clusters Dump energy rank and geographical position of the base station based on mobile terminal, the corresponding mobile terminal of selection cluster head node, set up D2D The method of cluster can promote the energy-consuming balance of the mobile terminal in D2D clusters, extend the network life of D2D clusters, while base station is obtained The dump energy rank rather than residual energy value of mobile terminal, so as to effectively reduction control overhead；In addition, mobile terminal root According to other mobile terminal co-operatings in the node type of itself, with D2D clusters, realize the corresponding mobile terminal of cluster head node with it is general Lead to the corresponding mobile terminal of node to coordinate, by the corresponding mobile terminal of cluster head node and/or the corresponding mobile terminal of ordinary node Mobile terminal executing data retransmission into cluster, so as to reduce the number of times of data packet retransmission, improves retransmission efficiency.Therefore, this hair The technical scheme of bright offer can solve the problem that when D2D sub-clusterings in the prior art retransmit data that control overhead is high, retransmission efficiency is low and ask Topic.
The method that D2D sub-clusterings based on above-mentioned offer are retransmitted, the embodiments of the invention provide the dress that a kind of D2D sub-clusterings are retransmitted Put, the device is applied to base station, and as shown in figure 20, the device includes the structural representation of the device：
Carried in acquiring unit 71, the service requesting information for obtaining mobile terminal transmission, the service requesting information There are mobile terminal dump energy rank, geographical position.
Unit 72 is set up, for setting up D2D clusters according to the mobile terminal dump energy rank, geographical position.
First radio unit 73, the cluster information for broadcasting D2D clusters, to cause acquisition for mobile terminal in the D2D clusters From the node type in cluster.
Optionally, this is set up unit 72 and included：
First order module, for being arranged by the order of mobile terminal dump energy rank from big to small mobile terminal Sequence obtains First ray.
Second order module, for by First ray according to geographical position and mobile terminal D2D clusters centre distance by closely to Remote order is ranked up, and obtains the second sequence.
Selecting module, for select the second sequence first corresponding mobile terminal be cluster head node, the second sequence its The corresponding mobile terminal in his position is ordinary node.
Optionally, as shown in figure 21, the device also includes：
Second radio unit 74, for according to the service requesting information, broadcasting corresponding with the service requesting information Packet.
Technical scheme provided in an embodiment of the present invention, base station obtains dump energy rank, the geographical position that mobile terminal is sent Put, D2D clusters are set up according to the dump energy rank of each mobile terminal and geographical position, base station is broadcasted to each mobile terminal The cluster information of D2D clusters, mobile terminal determines node type of the mobile terminal in D2D clusters, root according to D2D cluster information According to node type, it is performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and acts.Compared to base station root in the prior art According to the cluster head node correspondence in the residual energy value of the mobile terminal got or the geographical location choice D2D clusters of mobile terminal Mobile terminal, set up D2D clusters, re-transmission action, the technical scheme that provides of the present invention then performed by the cluster head node in D2D clusters Dump energy rank and geographical position of the base station based on mobile terminal, the corresponding mobile terminal of selection cluster head node, set up D2D The method of cluster can promote the energy-consuming balance of the mobile terminal in D2D clusters, extend the network life of D2D clusters, while base station is obtained The dump energy rank rather than residual energy value of mobile terminal, so as to effectively reduction control overhead；In addition, mobile terminal root According to other mobile terminal co-operatings in the node type of itself, with D2D clusters, realize the corresponding mobile terminal of cluster head node with it is general Lead to the corresponding mobile terminal of node to coordinate, by the corresponding mobile terminal of cluster head node and/or the corresponding mobile terminal of ordinary node Mobile terminal executing data retransmission into cluster, so as to reduce the number of times of data packet retransmission, improves retransmission efficiency.Therefore, this hair The technical scheme of bright offer can solve the problem that when D2D sub-clusterings in the prior art retransmit data that control overhead is high, retransmission efficiency is low and ask Topic.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
, can be with several embodiments provided by the present invention, it should be understood that disclosed systems, devices and methods Realize by another way.For example, device embodiment described above is only schematical, for example, the unit Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example, multiple units or group Part can combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown Or the coupling each other discussed or direct-coupling or communication connection can be by some interfaces, device or unit it is indirect Coupling is communicated to connect, and can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list Member can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are to cause a computer Device (can be personal computer, server, or network equipment etc.) or processor (Processor) perform the present invention each The part steps of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read- Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various Can be with the medium of store program codes.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.

Claims (28)

1. a kind of method that D2D sub-clusterings are retransmitted, it is characterised in that suitable for mobile terminal, methods described includes：
Send in service requesting information, the service requesting information and carry mobile terminal dump energy rank, geographical position；
D2D cluster information is obtained, node type of the mobile terminal in D2D clusters is determined；
According to the node type, it is performed in unison with corresponding re-transmission with other mobile terminals in D2D clusters and acts.
2. according to the method described in claim 1, it is characterised in that in the transmission service requesting information, the service request Before carrying mobile terminal dump energy rank, geographical position in information, in addition to：
All energy values in the maximum energy value that the mobile terminal can be born to zero are divided into by descending order Some set；
For some set distribution energy ranks.
3. according to the method described in claim 1, it is characterised in that before the transmission service requesting information, in addition to：
Extract the residual energy value of the mobile terminal；
According to the residual energy value, corresponding energy rank is determined；
Then the transmission service requesting information includes：
According to the reserved bit in the energy rank configuration service solicited message；
The service requesting information is sent to base station.
4. according to the method described in claim 1, it is characterised in that the acquisition D2D cluster information, determine that the mobile terminal exists Node type in D2D clusters includes：
The cluster message of base station broadcast is obtained, D2D cluster information is extracted, the ID of D2D clusters is carried in the D2D clusters information, in cluster The ID of mobile terminal is according to the ID sequences after the arrangement of specified order；
ID sequences after being arranged according to the ID of mobile terminal in the cluster according to specified order, judge that the ID of the mobile terminal exists Position in the ID sequences；
When judging first places of the ID of the mobile terminal in the ID sequences, determine the mobile terminal in D2D clusters Cluster head node；
When judging first places of the ID of the mobile terminal not in the ID sequences, it is D2D clusters to determine the mobile terminal In ordinary node.
5. method according to claim 4, it is characterised in that obtain D2D cluster information, determine the mobile terminal in D2D Also include after node type in cluster：
Receive the packet of base station broadcast；
Judge the packet whether be base station broadcast last packet；
If judgement is, at the time of record receives last described packet；
Determine that the moment sends the time zero that packet receives confirmation for mobile terminal.
6. method according to claim 5, it is characterised in that the determination moment is that mobile terminal sends packet Include after the time zero for receiving confirmation：
Determine position of the mobile terminal in specified sequence；
Slot length according to needed for one packet in the position and default reception receives confirmation, determines the shifting At the time of dynamic terminal sends packet reception confirmation.
7. method according to claim 6, it is characterised in that one slot length include a protection time slot and Mobile terminal sends a packet and receives confirmation required time.
8. method according to claim 7, it is characterised in that according to one packet in the position and default reception The slot length needed for confirmation is received, determining that the mobile terminal is sent at the time of packet receives confirmation includes：
When it is determined that n-th in the specified sequence of the mobile terminal, according to formula ts=tb+n×tg+(n-1)×taMeter At the time of calculation obtains other mobile terminals transmission packet reception confirmation corresponding with the position；
Wherein, tsFor ordinary node the time slot that packet receives confirmation is sent to cluster head node；tbFinished receiving for packet At the time of correspondence；N is ordinary node position in specified sequence；tgThe time of default protection time slot；taFor default transmission number Time the need for receiving confirmation according to bag.
9. according to the method described in claim 1, it is characterised in that when it is determined that the mobile terminal is cluster head section in D2D clusters During point, being performed in unison with corresponding re-transmission action with other mobile terminals in D2D clusters includes：
When it is determined that itself be not properly received packet after, inquiry is properly received other shiftings in the corresponding D2D clusters of the packet Dynamic terminal；
Select dump energy rank is maximum to specify in other mobile terminals from being properly received in the corresponding D2D clusters of the packet Mobile terminal；
Judge other mobile terminals in packet and D2D clusters that can the specified mobile terminal need the mobile terminal The packet needed carries out network code；
If being judged as YES, send network code to the specified mobile terminal and notify, so that the specified mobile terminal carries out net Packet after network coding and broadcast code.
10. according to the method described in claim 1, it is characterised in that when it is determined that the mobile terminal is common section in D2D clusters During point, being performed in unison with corresponding re-transmission action with other mobile terminals in D2D clusters includes：
When the packet that cluster head node is not properly received, the network code for receiving the corresponding mobile terminal transmission of cluster head node leads to Know；
To specifying packet to carry out network code；
Packet after broadcast code.
11. method according to claim 9, it is characterised in that when it is determined that the mobile terminal is cluster head section in D2D clusters During point, being performed in unison with corresponding re-transmission action with other mobile terminals in D2D clusters also includes：
When detecting that mobile terminal is not properly received the packet of base station broadcast in cluster, the corresponding movement of the cluster head node Terminal sends HARQ information to base station；
Mobile terminal receives the packet in cluster.
12. a kind of method that D2D sub-clusterings are retransmitted, it is characterised in that suitable for base station, methods described includes：
Obtain in the service requesting information that mobile terminal is sent, the service requesting information and carry mobile terminal residual energy magnitude Not, geographical position；
D2D clusters are set up according to the mobile terminal dump energy rank, geographical position；
The cluster information of D2D clusters is broadcasted, to cause node type of the acquisition for mobile terminal certainly in cluster in the D2D clusters.
13. method according to claim 12, it is characterised in that it is described according to the mobile terminal dump energy rank, D2D clusters are set up in geographical position to be included：
Mobile terminal is ranked up by the order of mobile terminal dump energy rank from big to small and obtains First ray；
Order by First ray according to geographical position with mobile terminal D2D clusters centre distance from the near to the remote is ranked up, and is obtained Second sequence；
First corresponding mobile terminal for selecting the second sequence is cluster head node, other corresponding mobile terminals of the second sequence For ordinary node.
14. method according to claim 13, it is characterised in that the cluster information of the broadcast D2D clusters, described to cause Acquisition for mobile terminal also includes from after the node type in cluster in D2D clusters：
According to the service requesting information, packet corresponding with the service requesting information is broadcasted.
15. the device that a kind of D2D sub-clusterings are retransmitted, it is characterised in that suitable for mobile terminal, described device includes：
Transmitting element, mobile terminal residual energy magnitude is carried for sending in service requesting information, the service requesting information Not, geographical position；
Acquiring unit, for obtaining D2D cluster information, determines node type of the mobile terminal in D2D clusters；
Retransmission unit, for according to the node type, being performed in unison with corresponding retransmit with other mobile terminals in D2D clusters and moving Make.
16. device according to claim 15, it is characterised in that described device also includes：
Taxon, for all energy values in the maximum energy value to zero that can bear the mobile terminal by from big to small Sequentially, some set are divided into；
Allocation unit, for distributing energy ranks for some set.
17. device according to claim 15, it is characterised in that described device also includes：
Extraction unit, the residual energy value for extracting the mobile terminal；
First determining unit, for according to the residual energy value, determining corresponding energy rank；
Then transmitting element includes：
Configuration module, for the reserved bit in the energy rank configuration service solicited message；
Sending module, for sending the service requesting information to base station.
18. square law device according to claim 15, it is characterised in that the acquiring unit includes：
Acquisition module, the cluster message for obtaining base station broadcast is extracted and carried in D2D cluster information, the D2D clusters information ID sequences after the ID of mobile terminal is arranged according to specified order in the ID of D2D clusters, cluster；
Judge module, the ID sequences after being arranged for the ID according to mobile terminal in the cluster according to specified order judge described Positions of the ID of mobile terminal in the ID sequences；
First determining module, for when judging first places of the ID of the mobile terminal in the ID sequences, it is determined that described Mobile terminal is the cluster head node in D2D clusters；
Second determining module, for when judging first places of the ID of the mobile terminal not in the ID sequences, determining institute It is the ordinary node in D2D clusters to state mobile terminal.
19. device according to claim 18, it is characterised in that described device also includes：
Receiving unit, the packet for receiving base station broadcast；
Judging unit, for judge the packet whether be base station broadcast last packet；
Recording unit, if for judging it is at the time of recording to receive last described packet；
Second determining unit, for determining that the moment sends the time zero of packet reception confirmation for mobile terminal.
20. device according to claim 19, it is characterised in that described device also includes：
3rd determining unit, for determining position of the mobile terminal in specified sequence；
4th determining unit, needed for for receiving confirmation according to one packet in the position and default reception when Gap length, at the time of determining that the mobile terminal sends packet reception confirmation.
21. device according to claim 20, it is characterised in that one slot length include a protection time slot with And mobile terminal sends a packet and receives confirmation required time.
22. device according to claim 21, it is characterised in that the 4th determining unit includes：
Computing module, for when determining n-th of the mobile terminal in the specified sequence, according to formula ts=tb+n× tg+(n-1)×taAt the time of calculating obtains other mobile terminals transmission packet reception confirmation corresponding with the position；
Wherein, tsFor ordinary node the time slot that packet receives confirmation is sent to cluster head node；tbFinished receiving for packet At the time of correspondence；N is ordinary node position in specified sequence；tgThe time of default protection time slot；taFor default transmission number Time the need for receiving confirmation according to bag.
23. device according to claim 15, it is characterised in that the retransmission unit includes：
Enquiry module, for when the packet for determining itself not to be properly received after, to be properly received the packet corresponding for inquiry Other mobile terminals in D2D clusters；
Selecting module, for selecting dump energy from being properly received in the corresponding D2D clusters of the packet in other mobile terminals The maximum specified mobile terminal of rank；
Judge module, for judging packet and D2D clusters that can the specified mobile terminal need the mobile terminal The packet that other interior mobile terminals need carries out network code；
First sending module, if for being judged as YES, sending network code to the specified mobile terminal and notifying, so that described refer to Determine mobile terminal and carry out the packet after network code and broadcast code.
24. device according to claim 15, it is characterised in that the retransmission unit includes：
First receiving module, for when the packet that cluster head node is not properly received, receive cluster head node it is corresponding it is mobile eventually The network code that end is sent is notified；
Coding module, for specifying packet to carry out network code；
Broadcast module, for the packet after broadcast code.
25. device according to claim 24, it is characterised in that retransmission unit also includes：
Second sending module, it is described for when detecting that mobile terminal is not properly received the packet of base station broadcast in cluster The corresponding mobile terminal of cluster head node sends HARQ information to base station；
Second receiving module, the packet is received for mobile terminal in cluster.
26. the device that a kind of D2D sub-clusterings are retransmitted, it is characterised in that suitable for base station, described device includes：
Movement is carried in acquiring unit, the service requesting information for obtaining mobile terminal transmission, the service requesting information Terminal residual energy rank, geographical position；
Unit is set up, for setting up D2D clusters according to the mobile terminal dump energy rank, geographical position；
First radio unit, the cluster information for broadcasting D2D clusters, with cause in the D2D clusters acquisition for mobile terminal from Node type in cluster.
27. device according to claim 26, it is characterised in that the unit of setting up includes：
First order module, for being ranked up by the order of mobile terminal dump energy rank from big to small to mobile terminal To First ray；
Second order module, for by First ray according to geographical position and mobile terminal D2D clusters centre distance from the near to the remote Order is ranked up, and obtains the second sequence；
Selecting module, first corresponding mobile terminal for selecting the second sequence is cluster head node, other positions of the second sequence Corresponding mobile terminal is ordinary node.
28. device according to claim 27, it is characterised in that described device also includes：
Second radio unit, for according to the service requesting information, broadcasting packet corresponding with the service requesting information.
CN201710265924.8A 2017-04-21 2017-04-21 The method and device that a kind of D2D sub-clusterings are retransmitted Pending CN107094068A (en)

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