CN101635882B - Method for realizing all network voice broadcast in multi-hop Ad Hoc radio station network - Google Patents
Method for realizing all network voice broadcast in multi-hop Ad Hoc radio station network Download PDFInfo
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Abstract
The invention discloses a method for realizing all network voice broadcast in a multi-hop Ad Hoc radio station network. The technical scheme of the method is that an all network broadcast voice sender radio station sends voice through a voice time slot and records the voice at the same time; a receiver radio station sends and forwards an all network broadcast voice notice in the data time slot; a radio station which receives the all network broadcast voice notice and does not receive the voice sends an all network broadcast voice non-arrival notice; after receiving the all network broadcast voice non-arrival notice, the sender radio station sends the recorded voice to a node which does not receive the all network broadcast voice in the data time slot by using a multicast mode. Therefore, users in the Ad hoc radio station network can give commands conveniently and efficiently in the entire network, and the commands can be intuitively sent to all users in the network. The method is applied to the Ad Hoc radio station network.
Description
Technical field
The present invention relates to wireless network and insert the field, particularly a kind of in multi-hop Ad hoc network, realize the whole network voice broadcast method.
Background technology
The cell mobile communication systems of current extensive use is centralized control, and the operation of network will be based on the network facilities of setting up in advance.These two characteristics make cell mobile communication systems also inapplicable concerning some special occasions.For example, the rescue behind army's rapid deployment and propelling on the battlefield, generation earthquake or the floods.The communication of these occasions can not depend on any network facilities of setting up in advance, considers to take the control mode at center based on robustness.At this moment, need a kind of special communication system: the operation of this communication system can not want to realize interim, fast automatic networking that node is wanted and can be moved based on any network facilities of setting up in advance.These requirements have been satisfied in the appearance of Ad hoc network.
Each node not necessarily is in the full-mesh state in the Ad hoc net, and some data between nodes communication need be transmitted through the multi-hop of other node.At present only there is the forwarding mechanism of data service in the Ad hoc radio station network and do not have the forwarding mechanism of voice service.Present voice service adopts broadcast mode to send, and promptly the node in the one jumping scope of originating party radio station can both receive speech, but the extraneous node of a jumping can't receive speech.Therefore, existing voice service pattern only can satisfy the Speech Communication demand between adjacent node, need can't satisfy the demands when the crew assigns provisional orders running into accident.To in the multi-hop Ad Hoc radio station network, issue an order to the crew simultaneously at present, can only realize by the method that sends the whole network broadcasting data messages.The whole network broadcasting data messages is compared with the whole network voice broadcast, aspect input convenience and the output intuitive shortcoming that can't overcome is being arranged, and voice service is again the most frequently used business in actual the use.Therefore, press for a kind of method that in multi-hop Ad Hoc radio station network, realizes the whole network voice broadcast.
To realize the whole network voice broadcast in multi-hop Ad Hoc radio station network, must solve the speech forwarding problems.For broadband cable network, this problem can realize by the method for setting up many real-time conversion links.For Ad Hoc radio station network, because its bandwidth is by a plurality of nodes sharing, and topological structure can constantly change, and is difficult to set up many real-time conversion links.Simultaneously, because the demand of the sudden and real-time of speech, there is not the dialing procedure of similar landline telephone.Therefore, need utilize interstation interactive information, set up speech forwarding mechanism based on the multicast route in conjunction with the bandwidth characteristic and the topological property of Ad Hoc radio station network.
Summary of the invention
The object of the present invention is to provide a kind of method that can under various application occasions, various bandwidth condition, be implemented in broadcasting the whole network speech in the multi-hop Ad hoc radio station network, assurance Ad hoc radio station network user can be issued an order to the whole network quickly and easily, and order can be sent to each user of the whole network intuitively.
Technical scheme of the present invention is achieved in that
(1) at first set the Speech Communication priority in each radio station, carry out synchronous network then, set up the AdHoc network, each radio station node adopts time division multiple access to insert (TDMA) mode, and each channel is divided into isometric one by one time frame; Each time frame is divided into three kinds of time slots: management time slot, speech time slot, data slot, wherein, management slot transmission synchronizing information and management information; Speech slot transmission voice data, speech adopt 2400bps melp (MELP) sound sign indicating number words encryption algorithm, and the speech time slot do not allocate in advance, are used by all nodes competitions; Data slot transmission other data except that voice data, described other data are divided into two types of prioritized data and general data, and each node will preferentially send and transmit prioritized data, and the data slot mean allocation is to each node;
(2) according to the topology location in each radio station, radio station and initiator one that each radio station node is divided in the whole network voice broadcast initiator radio station, the initiator's one jumping scope jump three types in extraneous radio station; If the user selects certain radio station to send the whole network voice broadcast, then this radio station is the whole network voice broadcast initiator radio station, at this moment, forwards step (3) to; If certain radio station receives information such as voice data, speech type at the speech time slot, then be the radio station in initiator's one jumping scope, at this moment, forward step (4) to; If certain radio station does not receive the whole network voice broadcast at the speech time slot, and receiving the whole network voice broadcast bulletin at data slot, then is that initiator one jumps extraneous radio station, at this moment, forwards step (5) to;
(3) when the radio station request sends the whole network voice broadcast, if current being in radio station received the speech state, will start speech intrusion program, require the other side radio station to stop speech and send; After waiting for that microphone returns prompt tone, user's sound of can giving orders or instructions will be encoded by the speech coding module to the speech input that the user stops to send till the speech from returning prompt tone, and coding result will send at the speech time slot, be recorded in simultaneously in the internal memory; When the user asked to send speech, the radio station started timer, exceeds maximum the whole network voice broadcast transmitting time if the user sends the speech time, and speech sends and record finishes automatically, and returns prompting; Maximum the whole network voice broadcast transmitting time is provided with according to current channel speed voluntarily by the radio station; Carry secretly at the speech time slot and to send speech type information and order ID number: the speech type is the whole network voice broadcast; Order ID number is by this radio station maintenance update, each select to send the whole network voice broadcast after, upgrade this order ID number; After beginning to send the whole network voice broadcast, calculate wait the whole network voice broadcast undelivered bulletin time according to current Ad Hoc network topology structure; After waiting for end, add up current the whole network voice broadcast undelivered bulletin of receiving, link-quality table according to local maintenance, according to Ke Sitela (Dijkstra) algorithm computation multicast route, by the multicast mode, send the sound sign indicating number words data of record in advance at data slot, sound sign indicating number words data to needing burst to send are provided with burst sequence number and end mark, after data send, start the timer wait acknowledge, the wait acknowledge time is calculated by current Ad Hoc network topology structure and obtains, and after wait finishes, as does not receive all and replys, again send the voice data burst that does not obtain replying at data slot, the target radio station is the dont answer node; Reply as receiving all, perhaps surpass maximum number of retransmissions, execution in step (6);
(4) radio station is after the speech time slot receives speech, therefrom extract speech and speech type information, if find that the speech type is the whole network voice broadcast, then the initiator address that the speech time slot is received, order information such as ID number, add that this address, radio station is encapsulated as the whole network voice broadcast bulletin, sends at data slot; Add relative recording at the whole network voice broadcast record sheet, recorded content comprises sender address, order ID number, speech accepting state and record creation-time, and wherein the speech accepting state is labeled as and receives; Execution in step (6) afterwards;
(5) radio station is after data slot receives the whole network voice broadcast bulletin, retrieval the whole network voice broadcast record sheet, as find not have this record, in the whole network voice broadcast record sheet, add record, recorded content comprises sender address, order ID number, speech accepting state and record creation-time, wherein the speech accepting state is labeled as and waits for reception, and from bulletin, extract each internodal link-quality of forward-path, upgrade the link-local quality table, forward node territory in received the whole network voice broadcast bulletin is added link quality information and this machine address, transmit at data slot; As find existing this record, and record type is for receiving, then do not handle, but receive for waiting for if find record type, then reception result and recorded content are compared, as the forward-path in the whole network voice broadcast bulletin of new reception the better link quality is arranged, then upgrade record sheet, the link-quality table, after waiting for a data slot cycle, send the whole network voice broadcast undelivered bulletin at data slot, this bulletin is unicast data, and the target radio station is the whole network voice broadcast transmit leg radio station, and its transmit path is selected according to the link-quality table, the radio station is after data slot receives the whole network voice broadcast data, search and send the whole network voice broadcast record sheet, as finding relative recording is arranged, transmission is replied; Receive for waiting for as record type, according to the sequence number of voice data, the journal voice data is after voice data receives, sound sign indicating number words data are delivered to decoding chip be converted to simulated voice output, and the record type in the whole network voice broadcast record sheet changed to receive; Execution in step (6) afterwards;
(6) regularly safeguard the whole network voice broadcast record sheet in the radio station, and the record of deletion record creation-time before half an hour returns step (2) then, continues to wait for user's speech input.
Wherein, the sound sign indicating number words data in the bulletin of the whole network voice broadcast in above-mentioned steps (4), (5) and the whole network voice broadcast undelivered bulletin and the step (3) are prioritized data.The whole network voice broadcast undelivered bulletin in the above-mentioned steps (5) is carried each internodal link quality information of forward-path secretly.
Be after extracting each internodal link quality information renewal link-local quality table of forward-path of carrying secretly in the whole network voice broadcast undelivered bulletin earlier, in the above-mentioned steps (3) again according to Ke Sitela algorithm computation multicast route.
Be that the whole network voice broadcast undelivered bulletin is replied repeatedly re-transmission type data for hop-by-hop implicit expression in the above-mentioned steps (5).The transmission situation of each next jumping of node detection, if next-hop node be not the final purpose node and do not transmit this bulletin, do not receive that promptly implicit expression replys, will repeat to send this data.
The present invention is owing to cut apart channel by the time, each time frame is divided into management time slot, speech time slot and data slot, voice service can utilize the speech time slot to send in the one jumping scope, one jumping scope receives speech outward can carry out the multi-hop routing forwarding at data slot by the speech coding data that will write down in advance and obtain, thereby realizes the whole network voice broadcast.In the Ad hoc radio station network of the whole network voice broadcast was provided, the user can issue an order to the whole network quickly and easily, and order can be sent to each user of the whole network intuitively.
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that the structure that realizes the time slot of the whole network voice broadcast method in the Ad hoc radio station network of the present invention is formed schematic diagram;
Fig. 2 is a kind of topological structure schematic diagram of Ad hoc radio station network of the present invention;
Fig. 3 is the whole network voice broadcast initiator of the present invention radio station processing procedure;
Fig. 4 is a multi-hop speech process of transmitting of the present invention;
Fig. 5 is the processing procedure that initiator one of the present invention jumps extraneous radio station.
Embodiment
As Fig. 1～shown in Figure 5, realize the method for the whole network voice broadcast in the Ad hoc radio station network of the present invention, may further comprise the steps:
(1) as shown in Figure 1, set the Speech Communication priority in each radio station, give each node, carry out synchronous network then, set up Ad Hoc network the data slot mean allocation.In the process of synchronous network, preestablishing certain radio station node is main platform, and other node is for belonging to platform.Each radio station node adopts time division multiple access to insert (TDMA) mode, and the process of synchronous network is exactly that main platform belongs to platform transmission timing signal, the process of unified the whole network time to each.As not setting priority in advance, giving tacit consent to main platform is limit priority, and other radio station is a normal priority.After finishing synchronously, channel is divided into isometric one by one time frame.In order to guarantee the reliable transmission of synchronizing signal and voice service, each time frame is divided into three kinds of time slots: management time slot, speech time slot, data slot.Management slot transmission synchronizing information and management information; Speech slot transmission voice data, speech adopt 2400bps melp (MELP) sound sign indicating number words encryption algorithm, and described speech time slot do not allocate in advance, are used by all nodes competitions; Data slot transmission other data except that voice data, described other data are divided into two types of prioritized data and general data, and each node will preferentially send and transmit prioritized data, and the data slot mean allocation is to each node.Each radio station node maintenance the whole network voice broadcast record sheet separately, its recorded content comprise transmit leg mac address, order ID number, speech accepting state and record creation-time.Wherein the mac address in each radio station is all inequality in the net, so the message registration of different nodes can be distinguished in transmit leg mac address; Order is used to distinguish the different voice calls that same radio station node is initiated for ID number; The speech accepting state is divided into and receives and wait for and receive two kinds, is used to write down the reception condition of the whole network voice broadcast; The record creation-time is the settling time of current record, is used for overtime deletion, avoids message registration to take too much internal memory.
(2) as shown in Figure 2, topology location according to each radio station, radio station and initiator one that each radio station node is divided in the whole network voice broadcast initiator radio station, the initiator's one jumping scope jump three types in extraneous radio station, if the user selects to send the whole network voice broadcast, it then is the whole network voice broadcast initiator radio station, at this moment, forward step (3) to; If the recipient radio station receives information such as voice data, speech type at the speech time slot, then be the radio station in initiator's one jumping scope, at this moment, forward step (4) to; If the radio station does not receive the whole network voice broadcast at the speech time slot, and receiving the whole network voice broadcast bulletin at data slot, then is that initiator one jumps extraneous radio station, at this moment, forwards step (5) to.
(3) as shown in Figure 3, when the user presses down the PTT key, request sends speech, and when selecting the speech type to be the whole network voice broadcast in advance, if current being in radio station received the speech state, will start speech intrusion program, requires the other side radio station to stop the speech transmission.After waiting for that microphone returns prompt tone, user's sound of can giving orders or instructions.Unclamp the PTT key from returning prompt tone to the user, the speech input that stops to send till the speech will be encoded by the speech coding module, and coding result will send at the speech time slot, be recorded in the internal memory simultaneously.The user presses down the PTT key, and when request sent speech, the radio station started timer, exceeds maximum the whole network voice broadcast transmitting time if the user sends the speech time, and speech sends and record finishes automatically, and returns prompting.Maximum the whole network voice broadcast transmitting time is provided with according to current channel speed voluntarily by the radio station.Carry secretly at the speech time slot and to send speech type information and order ID number, the speech type is the whole network voice broadcast.Order ID number is by this radio station maintenance update, each select to send the whole network voice broadcast after, this ID upgrades.As shown in Figure 4, begin to send the whole network voice broadcast after, wait for the individual data slot cycle of N (N=2n-1).Wherein n be current Ad Hoc net interior from the transmit leg node farthest the radio station node and the topology distance between the transmit leg node.Data slot cycle is meant that all nodes all have an opportunity to send the time of a secondary data, the different variation of data slot number that it distributes according to networking interstitial content and every node.When previous minute frame has 13 data time slots, if totally 13 nodes in the net, each node distributes 1 data time slot, and then a data slot cycle is consistent with the time interval of a branch frame.Wait for 2n-1 data slot cycle can guarantee in the n jumping scope node reply equal can returning.Wait for and finish the current the whole network voice broadcast undelivered bulletin received of back statistics, after extracting each internodal link quality information renewal link-local quality table of forward-path of carrying secretly in the whole network voice broadcast undelivered bulletin earlier, again according to Ke Sitela algorithm computation multicast route.By the multicast mode, send the sound sign indicating number words data of record in advance at data slot, data type is a prioritized data, the sound sign indicating number words data to needing burst to send are provided with burst sequence number and end mark.Adopt the multicast mode to send, compare, can save bandwidth with the mode that clean culture sends.After data send, start the timer wait acknowledge, the wait acknowledge time is calculated by current link-quality table and time slot allocation situation and obtains.After waiting for end, as do not receive all and reply that send the voice data burst that does not obtain replying at data slot again, the target radio station is the dont answer node.Retransmit number of times can by the user wait for 2n-1 data slot cycle can guarantee in the n jumping scope node reply equal can returning, but consider the situation that change in topology or channel error code cause the time-delay of the whole network voice broadcast undelivered bulletin to arrive, in sound sign indicating number words data transmission procedure, if receive new the whole network voice broadcast undelivered bulletin, adopt mode of unicast to this radio station node transmission sound sign indicating number words data separately.
(4) radio station is after the speech time slot receives speech, therefrom extract speech and speech type information, if find that the speech type is the whole network voice broadcast, then the initiator address that the speech time slot is received, order information such as ID number, add that this address, radio station is encapsulated as the whole network voice broadcast bulletin, send at data slot, data type is a prioritized data.Add relative recording at the whole network voice broadcast record sheet, wherein the speech accepting state is labeled as and receives.
(5) as shown in Figure 5, the radio station is after data slot receives the whole network voice broadcast bulletin, retrieval the whole network voice broadcast record sheet, as find not have this record, in the whole network voice broadcast record sheet, add record, recorded content comprises sender address, order ID number, speech accepting state and record creation-time, wherein the speech accepting state is labeled as and waits for reception, and from bulletin, extract each internodal link-quality of forward-path, upgrade the link-local quality table, forward node territory in received the whole network voice broadcast bulletin is added link quality information and this machine address, transmits that data type is a prioritized data at data slot; As find existing this record, and record type illustrates that for receiving the topology distance in this machine and transmit leg radio station is a jumping, then do not handle; As find that record type is to wait for receiving, received the whole network voice broadcast bulletin before illustrating, then reception result and recorded content compared the better link quality is arranged as the forward-path in the whole network voice broadcast bulletin of new reception, then upgrade record sheet, upgrade the link-quality table.In order to guarantee to receive the whole network voice broadcasts bulletin of all jumping scope interior nodes, need to wait for a data slot cycle.Therefore, after waiting for a data slot cycle, send the whole network voice broadcast undelivered bulletin at data slot, this bulletin is unicast data, data type is a prioritized data, the target radio station is the whole network voice broadcast transmit leg radio station, and its transmit path is selected according to the link-quality table, carries each internodal link quality information of transmit path in the bulletin secretly.The whole network voice broadcast undelivered bulletin is replied repeatedly re-transmission type data for hop-by-hop implicit expression.The transmission situation of each next jumping of node detection, if next-hop node be not the final purpose node and do not transmit this bulletin, do not receive that promptly implicit expression replys, will repeat to send this data.The radio station is searched and is sent the whole network voice broadcast record sheet after data slot receives the whole network voice broadcast data, and as finding to have relative recording, no matter record type has still received for waiting for receiving, and all sends and replys.Because, if record type is to wait for receiving, needs to send and reply, if for receiving, illustrating to have sent before, record type replys, lose but reply, need resend and reply.Receive for waiting for as record type, according to the sequence number of voice data, the journal voice data.After voice data all receives, sound sign indicating number words data are delivered to decoding chip be converted to simulated voice output, and the record type in the whole network voice broadcast record sheet changed to receive.
(6) regularly safeguard the whole network voice broadcast record sheet in the radio station, the record of deletion record creation-time before half an hour, thus guarantee that the whole network voice broadcast record sheet can be too not huge, reduce the record retrieval time.
Described above only is a kind of preferred embodiment of the present invention; those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (4)
1. method that realizes the whole network voice broadcast in multi-hop Ad Hoc radio station network is characterized in that may further comprise the steps:
(1) at first set the Speech Communication priority in each radio station, carry out synchronous network then, set up the AdHoc network, each radio station node adopts time division multiple access to insert (TDMA) mode, and each channel is divided into isometric one by one time frame; Each time frame is divided into three kinds of time slots: management time slot, speech time slot, data slot, wherein, management slot transmission synchronizing information and management information; Speech slot transmission voice data, speech adopt 2400bps melp (MELP) sound sign indicating number words encryption algorithm, and the speech time slot do not allocate in advance, are used by all nodes competitions; Data slot transmission other data except that voice data, described other data are divided into two types of prioritized data and general data, and each node will preferentially send and transmit prioritized data, and the data slot mean allocation is to each node;
(2) according to the topology location in each radio station, radio station and initiator one that each radio station node is divided in the whole network voice broadcast initiator radio station, the initiator's one jumping scope jump three types in extraneous radio station; If the user selects certain radio station to send the whole network voice broadcast, then this radio station is the whole network voice broadcast initiator radio station, at this moment, forwards step (3) to; If certain radio station receives voice data, speech type information at the speech time slot, then be the radio station in initiator's one jumping scope, at this moment, forward step (4) to; If certain radio station does not receive the whole network voice broadcast at the speech time slot, and receiving the whole network voice broadcast bulletin at data slot, then is that initiator one jumps extraneous radio station, at this moment, forwards step (5) to;
(3) when the radio station request sends the whole network voice broadcast, if current being in radio station received the speech state, will start speech intrusion program, require the other side radio station to stop speech and send; After waiting for that microphone returns prompt tone, user's sound of can giving orders or instructions will be encoded by the speech coding module to the speech input that the user stops to send till the speech from returning prompt tone, and coding result will send at the speech time slot, be recorded in simultaneously in the internal memory; When the user asked to send speech, the radio station started timer, exceeds maximum the whole network voice broadcast transmitting time if the user sends the speech time, and speech sends and record finishes automatically, and returns prompting; Maximum the whole network voice broadcast transmitting time is provided with according to current channel speed voluntarily by the radio station; Carry secretly at the speech time slot and to send speech type information and order ID number: the speech type is the whole network voice broadcast; Order ID number is by this radio station maintenance update, each select to send the whole network voice broadcast after, upgrade this order ID number; After beginning to send the whole network voice broadcast, calculate wait the whole network voice broadcast undelivered bulletin time according to current Ad Hoc network topology structure; After waiting for end, add up current the whole network voice broadcast undelivered bulletin of receiving, link-quality table according to local maintenance, calculate the multicast route according to dijkstra's algorithm, by the multicast mode, send the sound sign indicating number words data of record in advance at data slot, sound sign indicating number words data to needing burst to send are provided with burst sequence number and end mark, after data send, start the timer wait acknowledge, the wait acknowledge time is calculated by current Ad Hoc network topology structure and obtains, and after wait finishes, as does not receive all and replys, again send the voice data burst that does not obtain replying at data slot, the target radio station is the dont answer node; Reply as receiving all, perhaps surpass maximum number of retransmissions, execution in step (6);
(4) radio station is after the speech time slot receives speech, therefrom extract speech and speech type information, if find that the speech type is the whole network voice broadcast, then the initiator address that the speech time slot is received, order ID information, add that this address, radio station is encapsulated as the whole network voice broadcast bulletin, sends at data slot; Add relative recording at the whole network voice broadcast record sheet, recorded content comprises initiator address, order ID number, speech accepting state and record creation-time, and wherein the speech accepting state is labeled as and receives; Execution in step (6) afterwards;
(5) radio station is after data slot receives the whole network voice broadcast bulletin, retrieval the whole network voice broadcast record sheet, as find not have relative recording, in the whole network voice broadcast record sheet, add record, recorded content comprises the initiator address, order ID number, speech accepting state and record creation-time, wherein the speech accepting state is labeled as and waits for reception, and from bulletin, extract each internodal link-quality of forward-path, upgrade the link-local quality table, forward node territory in received the whole network voice broadcast bulletin is added link quality information and this machine address, transmit at data slot; As find existing this record, and and record type then do not handle for receiving, but if finding record type receives for waiting for, the forward-path in announcing as the whole network voice broadcast of new reception has the better link quality, then upgrades record sheet, link-quality table; After waiting for a data slot cycle, send the whole network voice broadcast undelivered bulletin at data slot, this bulletin is unicast data, and the target radio station is the whole network voice broadcast initiator radio station, and its transmit path is selected according to the link-quality table; The whole network voice broadcast record sheet is searched in the radio station after data slot receives the whole network voice broadcast data, as finding relative recording is arranged, and transmission is replied; Receive for waiting for as record type, according to the sequence number of voice data, the journal voice data is after voice data receives, sound sign indicating number words data are delivered to decoding chip be converted to simulated voice output, and the record type in the whole network voice broadcast record sheet changed to receive; Execution in step (6) afterwards;
(6) regularly safeguard the whole network voice broadcast record sheet in the radio station, and the record of deletion record creation-time before half an hour returns step (2) then, continues to wait for user's speech input.
2. according to the described method that in multi-hop Ad Hoc radio station network, realizes the whole network voice broadcast of claim 1, it is characterized in that a whole network voice broadcast bulletin and yard words data of the sound in the whole network voice broadcast undelivered bulletin and the step (3) in above-mentioned steps (4), the step (5) are prioritized data.
3. according to the described method that in multi-hop Ad Hoc radio station network, realizes the whole network voice broadcast of claim 1, it is characterized in that the whole network voice broadcast undelivered bulletin in the above-mentioned steps (5) is carried each internodal link quality information of forward-path secretly.
4. according to the described method that in multi-hop Ad Hoc radio station network, realizes the whole network voice broadcast of claim 1, it is characterized in that in the above-mentioned steps (3) it being after extracting each internodal link quality information renewal link-local quality table of forward-path of carrying secretly in the whole network voice broadcast undelivered bulletin earlier, to calculate the multicast route according to dijkstra's algorithm again.
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| CN106162525A (en) * | 2016-06-28 | 2016-11-23 | 施玥 | Shortwave MANET chain-circuit system |
| CN112543480B (en) * | 2020-12-10 | 2022-03-15 | 中国电子科技集团公司第二十研究所 | Voice time slot distribution and voice data transmission method based on virtual link |
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| CN101197748A (en) * | 2007-11-30 | 2008-06-11 | 华南理工大学 | Multi-jump wireless self-organizing network construction method based on partition tree |
| CN101489312A (en) * | 2008-12-19 | 2009-07-22 | 北京邮电大学 | Wireless Ad Hoc network fusion mechanism for different routing protocol |
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| CN101197748A (en) * | 2007-11-30 | 2008-06-11 | 华南理工大学 | Multi-jump wireless self-organizing network construction method based on partition tree |
| CN101489312A (en) * | 2008-12-19 | 2009-07-22 | 北京邮电大学 | Wireless Ad Hoc network fusion mechanism for different routing protocol |
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| US9655154B2 (en) | 2013-10-04 | 2017-05-16 | Fujitsu Limited | Device-to-device wireless communication |
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