CN104539402A - Broadcast transmission method for use in wireless network - Google Patents
Broadcast transmission method for use in wireless network Download PDFInfo
- Publication number
- CN104539402A CN104539402A CN201410734752.0A CN201410734752A CN104539402A CN 104539402 A CN104539402 A CN 104539402A CN 201410734752 A CN201410734752 A CN 201410734752A CN 104539402 A CN104539402 A CN 104539402A
- Authority
- CN
- China
- Prior art keywords
- node
- packet
- broadcast transmission
- reception
- receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a broadcast transmission method for use in a wireless network, and belongs to the field of communication. The method comprises the following steps: selecting a relay node; instructing the relay node and a transmission node to perform cooperative transmission; and transmitting coded data packets at a transmission stage. A node with optimal network quality is selected from receiving nodes for serving as the relay node, and the transmission node and the relay node are instructed to code data needing to be retransmitted into a coded packet for transmission, so that nodes failing in receiving the data packets previously can receive the data packets; the reoccurrence of retransmission is avoided; the retransmission times of the data packets can be saved; and the efficiency of network communication is increased.
Description
Technical field
The present invention relates to the communications field, the broadcast transmission method particularly in a kind of wireless network.
Background technology
In the field of communications, after sending node sends packet to receiving node, if receiving node does not receive complete packet, will trigger re-transmissions mechanism.
In existing technology, when receiving node detects that the packet self received is imperfect, repeat requests can be sent, so that sending node is after receiving repeat requests to sending node, again send packet to receiving node, make the packet at receiving node place complete.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
In present retransmission mechanism, if owing to there is network failure between sending node and receiving node, even if that triggers re-transmission repeatedly again, receiving node all can not be made to receive complete packet, and, usually there is multiple receiving node in a network, in these receiving nodes, the packet lost often also is not quite similar, this will make sending node when retransmitting, need a large amount of packets to resend, the transmitting time of re-transmission can be extended so undoubtedly, reduce the communication efficiency in network.
Summary of the invention
In order to solve the problem of prior art, the invention provides the broadcast transmission method in a kind of wireless network, described method comprises:
Broadcast transmission packet;
The sequence number receiving the node ID of self of receiving node broadcast transmission and unsuccessful reception packet, the node ID successfully receiving described packet and the fading coefficients corresponding with the described node ID successfully receiving described packet;
Choose the node ID that in described fading coefficients, minimum value is corresponding, make the node that described node ID is corresponding be via node;
Packet described in broadcast transmission;
The repeat requests that the node receiving the described packet of described unsuccessful reception sends;
After receiving the successful Received signal strength of via node, reception packet unsuccessful in described repeat requests is carried out network code, obtains coded data packet;
When network condition is less than predetermined threshold value, coded data packet described in broadcast transmission;
Optionally, described method also comprises:
When described network condition is greater than described predetermined threshold value, goes off the air and send described coded data packet.
Optionally, described repeat requests comprises the node ID of the described packet of described unsuccessful reception and the sequence number of described unsuccessful reception packet.
Also comprise the broadcast transmission method in another kind of wireless network, described transmission method comprises:
The node ID of unsuccessful reception packet and the sequence number of unsuccessful reception packet, the node ID of successful data reception bag and the fading coefficients corresponding with the described node ID successfully receiving described packet are carried out broadcast transmission;
Receive the described packet of described sending node broadcast transmission, the node broadcasts of the described packet of described unsuccessful reception sends repeat requests;
Receive the coded data packet of described sending node and/or the transmission of described relay node broadcasts, in conjunction with the packet of success reception, from described coded data packet, obtain the packet of described unsuccessful reception, thus obtain complete described packet;
After the packet obtaining described unsuccessful reception, the message that broadcast transmission successfully receives.
Optionally, described repeat requests comprises the node ID of the described packet of described unsuccessful reception and the sequence number of described unsuccessful reception packet.
Also comprise the broadcast transmission method in a kind of wireless network, described transmission method comprises:
The repeat requests that the node broadcasts receiving unsuccessful reception packet sends, carries out broadcast transmission by successful Received signal strength;
Reception packet unsuccessful in described repeat requests is carried out network code, obtains coded data packet;
Coded data packet described in broadcast transmission;
Optionally, described repeat requests comprises the node ID of the described packet of described unsuccessful reception and the sequence number of described unsuccessful reception packet.
The beneficial effect that technical scheme provided by the invention is brought is:
By choosing the node of network quality the best in a receiving node as via node, and make sending node and via node need the data encoding retransmitted to be that an encoded packets sends, thus the node receiving packet that failed before ensureing can receive packet, avoid the generation again retransmitted, the number of retransmissions of packet can also be saved, improve the efficiency of network service.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the broadcast transmission method in a kind of wireless network provided by the invention; .
Fig. 2 is wireless network interior joint distribution schematic diagram provided by the invention;
Fig. 3 is the distribution schematic diagram in wireless network provided by the invention with via node;
Fig. 4 is the schematic diagram that in wireless network provided by the invention, relay node broadcasts sends coded data packet;
Fig. 5 is the schematic diagram that in wireless network provided by the invention, sending node and via node send coded data packet simultaneously.
Embodiment
For making structure of the present invention and advantage clearly, below in conjunction with accompanying drawing, structure of the present invention is further described.
The broadcast transmission method proposed in the present embodiment is applied to network service, particularly relate to broadcast transmission method when transmission channel is unreliable in wireless multi-hop network, for reducing the data packet retransmission caused in data-bag lost situation, the method relates to sending node, receiving node and via node three end, clear in order to express the meaning, in the present embodiment, make S represent sending node, D represents receiving node, and R represents via node.
Method detailed is as follows, specifically as shown in Figure 1.
The invention provides the broadcast transmission method in a kind of wireless network, this transmission method comprises:
101, sending node broadcast transmission packet.
In force, sending node S is broadcast transmission packet in the entire network, specifically comprises x
1, x
2..., x
mm packet altogether, M is the natural number of>=1 here.
102, the node ID of unsuccessful reception packet and the sequence number of unsuccessful reception packet, the node ID of successful data reception bag and the fading coefficients corresponding with the node ID of successful data reception bag are carried out broadcast transmission by receiving node.
In force, by the part of nodes D of reception packet unsuccessful in receiving node
1, D
2..., D
mrepresent, and successfully receive the part of nodes R of packet
1, R
2..., R
nrepresent, above-mentioned node D
1, D
2..., D
mto the node ID D of sending node S broadcast transmission self
iand the sequence number X of the packet of unsuccessful reception
i, and node R
1, R
2..., R
nthen to the node ID of sending node S broadcast transmission self and fading coefficients corresponding to each node ID, i=1 here, 2 ..., M.Wherein, M, N are the natural number being not less than 1.
103, sending node receives the node ID of self and the sequence number of unsuccessful reception packet, the node ID of successful data reception bag and the fading coefficients corresponding with the node ID of successful data reception bag of receiving node broadcast transmission; Sending node chooses node ID corresponding to minimum value in fading coefficients, and the node making node ID corresponding is via node.
In force, sending node S receiving node D
1, D
2..., D
mthe node ID D of self of broadcast transmission
iand the sequence number X of unsuccessful reception packet
i, also receive the node ID R of successful data reception bag
iand with node ID R
icorresponding fading coefficients.
Wherein fading coefficients refers to that signal increases with the distance between receiver and transmitter in wireless communications, the numerical value of corresponding channel fading.In the present embodiment, the node of each above-mentioned successful data reception bag, has different distances between sending node S, namely has no fading coefficients.Fading coefficients is less, means that the distance of this receiving node and sending node S is nearer, and channel quality between sending node S is higher, therefore, using receiving node corresponding for minimum fading coefficients as via node, when carrying out the transmission of packet in back, there is more outstanding laser propagation effect.
Therefore according to fading coefficients, just R can be determined
1, R
2..., R
nthere is in these nodes the node of optimum network state, and will the node of optimum network state be in as via node R.
Concrete, as shown in Figure 2, wherein node R
1, R
2, R
3correctly receive packet, node D
1, D
2, D
3, D
4correctly do not receive packet, sending node S receives the confirmation signal ACK_R
1, ACK_R
2aCK_R
3after, select one at sending node S and node D
1, D
2, D
3, D
4between, there is the node R of minimum fading coefficients
2as relaying R, guarantee that the channel of sending node S to via node R is reliable, choose the result of via node as shown in Figure 3.
104, sending node broadcast transmission packet.
In force, sending node S is to M next-hop node D
1, D
2..., D
mwith via node R broadcast transmission M signal x
1, x
2..., x
m, specifically comprise x
1, x
2..., x
mm packet altogether, M is the natural number of>=1.
105, receiving node receives the packet of sending node broadcast transmission, and the node broadcasts of unsuccessful reception packet sends repeat requests.
Wherein, repeat requests comprises the node ID of unsuccessful reception packet and the sequence number of unsuccessful reception packet.
In force, the node D of unsuccessful reception packet
1, D
2..., D
mwheel streaming repeat requests NACK_x
1, NACK_x
2..., NACK_x
m, show node D
icorrectly do not receive packet x
i, and at repeat requests NACK_x
ipacket header add own node sequence number i and the unsuccessful packet x received
i.
106, the repeat requests that the node broadcasts that via node receives unsuccessful reception packet sends, carries out broadcast transmission by successful Received signal strength, the repeat requests that the node that sending node receives unsuccessful reception packet sends.
In force, via node R receives node D
1, D
2..., D
mthe repeat requests of broadcast transmission, generates confirmation signal ACK_R, and sends confirmation signal ACK_R.
107, reception packet unsuccessful in repeat requests is carried out network code by via node, obtain coded data packet, reception packet unsuccessful in repeat requests, after receiving the successful Received signal strength of via node, is carried out network code, obtains coded data packet by sending node.
In force, via node R just enters the cooperation transmission stage after sending confirmation signal ACK_R together with sending node S.
Due in step 106, via node R receives node D
1, D
2..., D
mthe repeat requests of broadcast transmission, therefore via node R is according to the unsuccessful packet x received comprised in repeat requests
i, determine the packet needing to retransmit, the packet retransmitted by above-mentioned needs carries out network-encoding operation, obtains coded data packet, and the particular content in this coded data packet is
by x
1, x
2..., x
mindividual data packet coding is a packet.
Similar, sending node S after receiving the confirmation signal ACK_R that via node R broadcasts, equally according to the unsuccessful packet x received comprised in repeat requests
i, determine the packet needing to retransmit, the packet retransmitted by above-mentioned needs carries out network-encoding operation, obtains coded data packet, and the particular content in this coded data packet is
by x
1, x
2..., x
m, M data packet coding is a packet altogether.
In this step, via node R and sending node S all to needing the packet retransmitted to carry out network-encoding operation, will need repeatedly to retransmit the packet x that could send originally
1, x
2..., x
mbe encoded to a packet, like this by a broadcast transmission, just can make node D
1, D
2..., D
mget the packet of needs.
108, sending node is when network condition is less than predetermined threshold value, broadcast transmission coded data packet; Relay node broadcasts sends coded data packet.
In force, after obtaining coded data packet, via node R broadcast transmission coded data packet, to make node D
1, D
2..., D
mcarry out the reception of coded data packet.
Optionally, when network condition is greater than predetermined threshold value, transmission coded data packet of going off the air.
With via node R unlike, sending node S is then the network channel quality according to present node, Dynamic Selection transmission mode, when sending node S is to node D
1, D
2..., D
mchannel fading coefficient larger time, now show that the channel quality at sending node S place is poor, only by via node R transfer encoding packet; When at sending node S to node D
1, D
2..., D
mchannel credible event under, sending node S and via node R sends coded data packet simultaneously, realizes the cooperation transmission of coded data packet, node D
1, D
2..., D
mby obtaining higher diversity gain, improve the transmission reliability of coded data packet.
Concrete, as shown in Figure 4, sending node S is to next-hop node D
1, D
2, D
3, D
4channel fading coefficient larger time, via node R transfer encoding packet
as shown in Figure 5 when sending node S is to next-hop node D
1, D
2, D
3, D
4channel credible event under, sending node S and via node R sends coded data packet simultaneously
Diversity gain wherein, refers in a certain accumulated time, diversity reception and single receiving level when receiving poor.In the present embodiment, when sending node S and via node R sends, level difference corresponding to the coded data packet that receiving node receives can be greater than level difference corresponding when sending by means of only sending node S, the diversity gain that high level difference is corresponding higher, show, when via node R and sending node S sends coded data packet simultaneously, to there is better diversity and improve effect.
By above-mentioned two kinds of send modes, receiving node just can be made to receive the data of needs by means of only once broadcasting, decreasing number of retransmissions, shorten the Packet Generation time.
109, receiving node receives the coded data packet of sending node and/or relay node broadcasts transmission, in conjunction with the packet of success reception, obtains the packet of unsuccessful reception, thus obtain complete packet from coded data packet.
In force, node D
i(i=1,2 ..., M) and receive coded data packet
after, the packet x correctly received with oneself
1..., x
i-1, x
i+1..., x
mcarry out network-encoding operation, recover packet x
i.
110, receiving node is after the packet obtaining unsuccessful reception, the message that broadcast transmission successfully receives.
In force, node D
1, D
2..., D
mrecovering packet x
1, x
2..., x
mafter, generate confirmation signal ACK_x
1, ACK_x
2..., ACK_x
m, and above-mentioned confirmation signal is carried out broadcast transmission.
Broadcast transmission method in a kind of wireless network proposed in the present embodiment, by choosing the node of network quality the best in a receiving node as via node, and make sending node and via node need the data packet coding retransmitted to be that an encoded packets sends, thus the node receiving packet that fails before ensureing can receive packet, avoid the generation again retransmitted, the number of retransmissions of packet can also be saved, improve the efficiency of network service.
It should be noted that: the broadcast transmission method in the wireless network that above-described embodiment provides carries out the embodiment of data packet retransmission, only as explanation in actual applications in the method, can also use in other application scenarioss according to actual needs and by above-mentioned transmission method, its specific implementation process is similar to above-described embodiment, repeats no more here.
The foregoing is only embodiments of the invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the broadcast transmission method in wireless network, is characterized in that, described transmission method comprises:
Broadcast transmission packet;
The sequence number receiving the node ID of self of receiving node broadcast transmission and unsuccessful reception packet, the node ID successfully receiving described packet and the fading coefficients corresponding with the described node ID successfully receiving described packet;
Choose the node ID that in described fading coefficients, minimum value is corresponding, make the node that described node ID is corresponding be via node;
Packet described in broadcast transmission;
The repeat requests that the node receiving the described packet of described unsuccessful reception sends;
After receiving the successful Received signal strength of via node, reception packet unsuccessful in described repeat requests is carried out network code, obtains coded data packet;
When network condition is less than predetermined threshold value, coded data packet described in broadcast transmission.
2. method according to claim 1, is characterized in that, described method also comprises:
When described network condition is greater than described predetermined threshold value, goes off the air and send described coded data packet.
3. method according to claim 1, is characterized in that, described repeat requests comprises the node ID of the described packet of described unsuccessful reception and the sequence number of described unsuccessful reception packet.
4. the broadcast transmission method in wireless network, is characterized in that, described transmission method comprises:
The node ID of unsuccessful reception packet and the sequence number of unsuccessful reception packet, the node ID of successful data reception bag and the fading coefficients corresponding with the described node ID successfully receiving described packet are carried out broadcast transmission;
Receive the described packet of described sending node broadcast transmission, the node broadcasts of the described packet of described unsuccessful reception sends repeat requests;
Receive the coded data packet of described sending node and/or the transmission of described relay node broadcasts, in conjunction with the packet of success reception, from described coded data packet, obtain the packet of described unsuccessful reception, thus obtain complete described packet;
After the packet obtaining described unsuccessful reception, the message that broadcast transmission successfully receives.
5. method according to claim 4, is characterized in that, described repeat requests comprises the node ID of the described packet of described unsuccessful reception and the sequence number of described unsuccessful reception packet.
6. the broadcast transmission method in wireless network, is characterized in that, described transmission method comprises:
The repeat requests that the node broadcasts receiving unsuccessful reception packet sends, carries out broadcast transmission by successful Received signal strength;
Reception packet unsuccessful in described repeat requests is carried out network code, obtains coded data packet;
Coded data packet described in broadcast transmission.
7. method according to claim 6, is characterized in that, described repeat requests comprises the node ID of the described packet of described unsuccessful reception and the sequence number of described unsuccessful reception packet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734752.0A CN104539402B (en) | 2014-12-04 | 2014-12-04 | A kind of broadcast transmission method in wireless network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734752.0A CN104539402B (en) | 2014-12-04 | 2014-12-04 | A kind of broadcast transmission method in wireless network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104539402A true CN104539402A (en) | 2015-04-22 |
| CN104539402B CN104539402B (en) | 2018-03-16 |
Family
ID=52854876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410734752.0A Expired - Fee Related CN104539402B (en) | 2014-12-04 | 2014-12-04 | A kind of broadcast transmission method in wireless network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104539402B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680990A (en) * | 2016-01-13 | 2016-06-15 | 北京理工大学 | Region information sharing method based on fountain coding |
| CN106603205A (en) * | 2016-12-09 | 2017-04-26 | 广州华多网络科技有限公司 | Data transmission method, apparatus, and system |
| CN107735961A (en) * | 2015-05-19 | 2018-02-23 | 诺基亚通信公司 | In the wireless network using basic function transmission broadcast control information |
| CN109451443A (en) * | 2018-12-27 | 2019-03-08 | 武汉盛帆电子股份有限公司 | Based on Lora wireless data transmission method, apparatus and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656600A (en) * | 2009-09-14 | 2010-02-24 | 西安交通大学 | Implementation method of opportunistic cooperation diversity protocol based on reinforced selective amplification-forwarding |
| CN102202264A (en) * | 2011-06-01 | 2011-09-28 | 中国人民解放军信息工程大学 | Wireless cooperation relay network reliable multicast transmission method and system |
| CN103634083A (en) * | 2013-12-20 | 2014-03-12 | 哈尔滨工业大学 | Dynamic network coded packet loss retransmission method suitable for sensor network |
-
2014
- 2014-12-04 CN CN201410734752.0A patent/CN104539402B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656600A (en) * | 2009-09-14 | 2010-02-24 | 西安交通大学 | Implementation method of opportunistic cooperation diversity protocol based on reinforced selective amplification-forwarding |
| CN102202264A (en) * | 2011-06-01 | 2011-09-28 | 中国人民解放军信息工程大学 | Wireless cooperation relay network reliable multicast transmission method and system |
| CN103634083A (en) * | 2013-12-20 | 2014-03-12 | 哈尔滨工业大学 | Dynamic network coded packet loss retransmission method suitable for sensor network |
Non-Patent Citations (1)
| Title |
|---|
| 戴翠琴: ""一种基于链路质量的选择协作式HARQ传输协议"", 《重庆邮电大学学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107735961A (en) * | 2015-05-19 | 2018-02-23 | 诺基亚通信公司 | In the wireless network using basic function transmission broadcast control information |
| CN105680990A (en) * | 2016-01-13 | 2016-06-15 | 北京理工大学 | Region information sharing method based on fountain coding |
| CN105680990B (en) * | 2016-01-13 | 2018-12-14 | 北京理工大学 | A kind of area information sharing method based on fountain coding |
| CN106603205A (en) * | 2016-12-09 | 2017-04-26 | 广州华多网络科技有限公司 | Data transmission method, apparatus, and system |
| WO2018103437A1 (en) * | 2016-12-09 | 2018-06-14 | 广州华多网络科技有限公司 | Method, device and system for transmitting data |
| CN106603205B (en) * | 2016-12-09 | 2020-01-03 | 广州华多网络科技有限公司 | Data transmission method, device and system |
| CN109451443A (en) * | 2018-12-27 | 2019-03-08 | 武汉盛帆电子股份有限公司 | Based on Lora wireless data transmission method, apparatus and system |
| CN109451443B (en) * | 2018-12-27 | 2021-05-11 | 武汉盛帆电子股份有限公司 | Data transmission method, device and system based on Lora wireless |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104539402B (en) | 2018-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10911183B2 (en) | System and method for HARQ for cellular integrated D2D communications | |
| JP4897055B2 (en) | Improved retransmission processing in wireless communication systems | |
| US8332704B2 (en) | Apparatus and method for supporting automatic retransmission request (ARQ) in a wireless relay communication system | |
| US7855970B2 (en) | Method for retransmission in mobile communication system | |
| CN101795170B (en) | Method, receiving equipment and system for realizing data feedback | |
| CN101917672B (en) | Collaborative transmission method for wireless broadcasting multicast service | |
| CN101674153B (en) | Method, device and system for processing information | |
| US10630430B2 (en) | System and method for dual-coding for dual-hops channels | |
| CN102694636A (en) | Transmitting and receiving methods and systems of HARQ (hybrid automatic repeat request) technology adopting fountain codes | |
| KR20160020098A (en) | Hybrid arq method and apparatus in a relay wireless communication system using compress and forward scheme | |
| CN102833051A (en) | Fountain coding broadcast method based on feedback | |
| CN108449161A (en) | Repeating method based on network code in a kind of relay cooperative wireless network | |
| CN104539402A (en) | Broadcast transmission method for use in wireless network | |
| WO2009127144A1 (en) | Data transmission method | |
| US10804999B2 (en) | Robust relay retransmissions with dual-coding | |
| CN103873216A (en) | Novel lost packet retransmission mechanism in WLAN (Wireless Local Area Network) multicast scene | |
| CN101964703A (en) | Data retransmission method and system | |
| CN102377544A (en) | Retransmission method in communication system | |
| WO2009127141A1 (en) | Data transmission method | |
| WO2018036222A1 (en) | Wireless communication system and method, data retransmission apparatus and method, and aggregated structure | |
| JP2014509488A (en) | Data transmission method, wireless communication system, target node and relay node | |
| Patil | On throughput performance of decode and forward cooperative relaying with packet combining and ARQ | |
| CN101527621A (en) | Method for requesting descending link-to-link hybrid auto-repeat in relay network | |
| EP1482671A1 (en) | Retransmission request method and apparatus in a broadcast communication system | |
| CN101282202A (en) | Mixed automatic repeat request method and data transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180316 Termination date: 20191204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |