CN102970686B - Method for long term evolution device to device (LTED2D) communication working on ISM frequency band - Google Patents
Method for long term evolution device to device (LTED2D) communication working on ISM frequency band Download PDFInfo
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- CN102970686B CN102970686B CN201110257753.7A CN201110257753A CN102970686B CN 102970686 B CN102970686 B CN 102970686B CN 201110257753 A CN201110257753 A CN 201110257753A CN 102970686 B CN102970686 B CN 102970686B
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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
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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
- H04L1/1607—Details of the supervisory signal
- H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
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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
- H04L2001/125—Arrangements for preventing errors in the return channel
Abstract
The invention discloses a method for long term evolution device to device (LTED2D) communication working on the ISM frequency band. The method specifically includes that an LTED2D receiver continuously transmits SREI indications to an LTED2D receiver when one LTED2D receiver cannot correctly receive acknowledgement character (ACK)/ negative acknowledgement (NACK) signals fed back by the LTED2D receiver on a pre-designated time frequency resource block after the LTED2D transmitter transmits data package to the LTED2D receiver. The SREI indications include requiring the LTED2D receiver to retransmit the ACK/ NACK signals not correctly received by the LTED2D transmitter. The method aims at improving ACK/NACK signaling flow of D2D communication transmission efficiency. The signaling flow is applied to the LTED2D communication working in the ISM frequency band. The LTED2D transmitter can avoid unnecessary data package retransmission to largest probability by periodically transmitting the SREI indications, so that the aim of improving D2D communication spectrum utilization ratio is achieved.
Description
Technical field
The invention belongs to mobile communication technology field, relate to a kind of LTE D2D communication means being operated in ISM band.
Background technology
Current cell mobile communication systems is a kind of centralized network communication system based on default infrastructure, mobile terminal in system does not allow to carry out point-to-point direct communication, and terminal room communication needs route through wired backbone or center control nodes and forwarding.Different from the communication mode of this centerized fusion, D2D (Device to Device) communication is a kind of direct communication between terminals technology be applied in cellular system of novelty, and it allows mobile terminal under the control of cellular system, use cellular system mandate frequency range to carry out point to point link.Reduce terminal transmit power owing to having, extend service time of battery, strengthen multicast and the many advantages such as broadcast transmission rate, raising system spectral efficiency, D2D communication becomes the study hotspot of wireless communication field gradually.
In recent years, along with the day of frequency spectrum resource is becoming tight, the communication technology based on LTE standard that can be operated in shared band (such as ISM band) is subject to paying attention to more and more widely.Using LTE communication technology in ISM band, following benefit can being brought: 1) for providing new market based on the future communication systems of LTE technology; 2) for cellular communication system provides extra capacity; 3) new application and communication solution (such as, using the wireless D2D communication of LTE technology) is produced.
In sum, although current LTE D2D communication be usually assumed to be need to take cellular system mandate frequency range to ensure controlled interference environment and transmission quality; But, be still necessary that conscientious research work communicates at the D2D of ISM band, because this will be a kind of cheaper, Novel Delivery technology of more efficiently, more having market prospects.
In order to enable LTE D2D system be operated in ISM band, main challenge comes from the coexistence problems of LTE D2D system and the wlan system based on IEEE802.11 series standard.Owing to using the wlan system of ISM band to be widely deployed at present, therefore LTE D2D system very likely can be deployed in certain same area simultaneously with certain wlan system and compete and use same frequency resource, thus causes strong inter-system interference.Although the use of numerous WLAN user to wireless channel can effectively be coordinated and be managed to the media access mechanism that IEEE 802.11 series standard defines (such as CSMA/CA mechanism), do not produce interference in serious system; But, between LTE D2D system and wlan system, there is not any coordination system.Specifically, for the wireless channel of any one ISM band, LTE D2D user cannot know that when this channel is taken by wlan system and when be released in advance, thus causes inevitable data packet collision and throughput degradation.In addition, LTE standard be for be operated in authorize frequency range communication system and design, never considered there is serious inter-system interference; Therefore, when being operated in ISM frequency range, in LTE system, many traditional closed loop physical layer procedures can not effectively work.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of LTE D2D communication means being operated in ISM band, and the method can use the frequency spectrum resource of ISM band expeditiously when being total to channel with WLAN.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of LTE D2D communication means being operated in ISM band, when correctly receiving the ack/nack signal of described LTE D2D receiver feedback after a LTE D2D transmitter sends packet to a LTE D2D receiver in preassigned time/frequency source block, described LTE D2D transmitter constantly sends SREI instruction to described LTE D2D receiver; Described SREI instruction comprises requirement LTE D2D receiver and retransmits the ack/nack signal that described LTE D2D transmitter correctly do not receive.
As a preferred embodiment of the present invention, described SREI instruction is by described LTE D2D transmitter periodic transmission, and the transmitting cycle of SREI instruction and emission maximum number of times are according to current specific network condition configuration.
As another kind of preferred version of the present invention, before the emission maximum number of times arrival that described SREI indicates, LTE D2D transmitter must periodic transmission SREI instruction, unless LTE D2D transmitter detect neighbouring wlan system communicating or LTED2D transmitter successfully have received LTE D2D receiver retransmit ack/nack signal.
As another preferred version of the present invention, when the emission maximum number of times that described SREI indicates has arrived but LTE D2D transmitter does not still correctly receive the ack/nack signal that LTE D2D receiver feeds back, LTE D2D transmitter will be " receiving NACK signal " depending on this situation, and initiate data packet retransmission according to LTE HARQ protocol or abandon current data packet.
As another preferred version of the present invention, once LTE D2D receiver successfully receives the SREI instruction that LTE D2D transmitter is launched, then LTE D2D receiver retransmits the ack/nack signal of the last feedback, unless LTE D2D receiver detects that neighbouring wlan system communicates.
As another preferred version of the present invention, this communication means specifically comprises the following steps:
1st step, when wlan system does not have data packet transmission in ISM band, the transmitter D1 in LTE D2D communication system sends a D2D packet to receiver D2, and receiver D2 successfully have received described D2D packet;
2nd step, after receiver D2 decoding success D2D packet, and feeding back ACK/NACK signal is to before transmitter D1 in preassigned time/frequency source block, the receiver D2 within the signal cover of WLAN detects the use of wlan system to described preassigned time/frequency source block;
3rd step, receiver D2 keep mourn in silence, cannot in preassigned time/frequency source block feeding back ACK/NACK signal to transmitter D1;
4th step, when transmitter D1 does not receive the ack/nack signal from receiver D2 in preassigned time/frequency source block, transmitter D1 reschedules or applies for time/frequency source block, periodically transmits SREI instruction to receiver D2;
5th step, once receiver D2 can reuse the time/frequency source block of ISM band, namely wlan system stopped communication, then receiver D2 retransmits the last ack/nack signal to respond SREI instruction to transmitter D1;
6th step, after transmitter D1 successfully have received the ack/nack signal of receiver D2 re-transmission, transmitter D1 performs the transmission of corresponding new data packets or old packet retransmission operation according to LTE HARQ protocol.
As another preferred version of the present invention, this communication means specifically comprises the following steps:
1st ' step, when wlan system does not have data packet transmission, the transmitter D2 in LTE D2D system sends a D2D packet to receiver D1, and receiver D1 successfully have received described D2D packet;
2nd ' step, after receiver D1 decoding success D2D packet, to need in preassigned time/frequency source block feeding back ACK/NACK signal to transmitter D2; Transmitter D2 within the signal cover of WLAN when receiving the ack/nack signal that receiver D1 feeds back in preassigned time/frequency source block disturb by the communication of wlan system;
3rd ' step, transmitter D2 reschedules or applies for that time/frequency source block periodically transmits SREI instruction to receiver D1;
4th ' step: once receiver D1 have received the SREI instruction that transmitter D2 launches, then receiver D1 retransmits the last ack/nack signal to respond SREI instruction to transmitter D2; If the ack/nack signal that receiver D1 retransmits is launched machine D2 and successfully receives, then transmitter D2 stops sending SREI instruction immediately; Otherwise transmitter D2 continues periodically to send SREI instruction, until reach the emission maximum number of times of SREI instruction;
5th ' step: when transmitter D2 successfully have received the ack/nack signal of receiver D1 re-transmission, transmitter D2 performs the transmission of corresponding new data packets or old packet retransmission operation according to LTE HARQ protocol.
Beneficial effect of the present invention is: the LTE D2D communication means being operated in ISM band of the present invention is intended to the ACK/NACK signaling process improving D2D communications efficiency, this signaling process is applied in the LTE D2D communication being operated in ISM band, indicated by periodic transmission SREI, make LTE D2D transmitter can avoid unnecessary data packet retransmission on very large probability, thus reach the object improving D2D communication spectrum utilance.
Description of the invention and application are illustrative, not want by scope restriction of the present invention in the above-described embodiments.Distortion and the change of embodiment disclosed are here possible, are known for the replacement of embodiment those those of ordinary skill in the art and the various parts of equivalence.Those skilled in the art are noted that when not departing from spirit of the present invention or substantive characteristics, and the present invention with other forms, structure, layout, ratio, and can realize with other elements, material and parts.
Accompanying drawing explanation
Fig. 1 a to Fig. 1 d is the scene schematic diagram of a kind of wlan system interference LTE system communication described in embodiment one;
Fig. 1 e is the schematic diagram being operated in the 4th step in the LTE D2D communication means of ISM band described in embodiment one;
Fig. 1 f is the schematic diagram being operated in the 5th step in the LTE D2D communication means of ISM band described in embodiment one;
Fig. 1 g is the schematic diagram being operated in the 6th step in the LTE D2D communication means of ISM band described in embodiment one;
Fig. 2 a to Fig. 2 c is the scene schematic diagram of the another kind of wlan system interference LTE system communication described in embodiment two;
Fig. 2 d is for being operated in the LTE D2D communication means of ISM band the 3rd described in embodiment two ' schematic diagram of step;
Fig. 2 e is for being operated in the LTE D2D communication means of ISM band the 4th described in embodiment two ' schematic diagram of step;
Fig. 2 f is for being operated in the LTE D2D communication means of ISM band the 5th described in embodiment two ' schematic diagram of step;
Fig. 3 is the schematic flow sheet being operated in the LTE D2D communication means of ISM band of the present invention.
Embodiment
The invention discloses a kind of LTE D2D communication means being operated in ISM band, as shown in Figure 3, the method is intended to the ACK/NACK signaling process improving D2D communications efficiency to flow process.This signaling process is applied in the LTE D2D communication being operated in ISM band, indicated by periodic transmission SREI (Status Report Error Indicator), make LTE D2D transmitter can avoid unnecessary data packet retransmission on very large probability, thus reach the object improving D2D communication spectrum utilance.
The present invention gives two typical examples illustrates when LTE D2D communication system works in ISM band, owing to being subject to the common-channel interference of wlan system, traditional LTE ACK/NACK signaling process can not effectively work, and result in inefficient frequency spectrum resource use, shown in detailed in Example one and two.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Embodiment one
The present embodiment provides a kind of wlan system to disturb the scene of LTE system communication, and as shown in Fig. 1 a to Fig. 1 d, LTE D2D user is deployed in an identical region (comprising transmitter D1 and receiver D2) and a wlan system.The communication of LTE D2D system all needs to use certain same channel in ISM band with communicating of wlan system.LTE D2D receiver D2 is positioned within the signal cover of WLAN, and LTE D2D transmitter D1 is positioned at outside the signal cover of WLAN.Without loss of generality, suppose the traffic carrying capacity of wlan system and unsaturated, that is: each WLAN user is not always have packets need to transmit.Therefore, this wireless channel also exists free time section to transmit for LTE D2D.LTE D2D user has the function of cognitive radio, can detect whether using this channel of wlan system, and use this wireless channel in the period of WLAN communication idle.
When wlan system does not have data packet transmission in ISM band, the transmitter D1 in LTE D2D communication system sends a D2D packet to receiver D2, and receiver D2 successfully have received this packet.After receiver D2 decoding success D2D packet, to need in preassigned time/frequency source block feeding back ACK signal to transmitter D1.Suppose in this section of idle period between receiver D2 decoding success packet and feeding back ACK signal, receiver D2 detects the use of wlan system to this channel, namely detect WLAN RTS/CTS signal, all users in WLAN RTS/CTS semaphore request wlan system signal cover keep a period of time mourn in silence avoid interference.Suppose that this period of silence period (being indicated by the NAV symbol in RTS/CTS signal) of being formulated by WLAN RTS/CTS signal covers the time/frequency source block of D2 feeding back ACK signal.In these cases, receiver D2 in LTE D2D system keeps mourning in silence, cannot in preassigned time/frequency source block feeding back ACK signal to transmitter D1.Therefore, transmitter D1 cannot receive ack/nack signal in preassigned time/frequency source block, and according to existing LTE protocol, transmitter D1 thinks " no signal " i.e. " NACK signal ".According to LTE HARQ protocol, in these cases, the transmitter D1 in LTE D2D system will initiate once unnecessary data packet retransmission, or directly abandons current data packet.Above-mentioned two kinds of reactions, all can cause the waste of Radio Resource.
In the LTE standard of current latest edition, the state of receiver feedback signal has three kinds, is respectively: ack signal, NACK signal and no signal.In the scene shown in Fig. 1 a to Fig. 1 d, be not difficult to find, the possible state of the receiver D2 feedback signal in LTE D2D system has in fact exceeded three kinds, is respectively: ack signal, NACK signal, ack signal but required to mourn in silence by wlan system, NACK signal but the no signal of to be mourned in silence by wlan system requirement and causing due to other reason.
Above-mentioned disturbed condition that the present embodiment runs into when ISM band according to LTE D2D system works, the ACK/NACK signaling process new for LTE D2D system is to guarantee efficient frequency of utilization resource.
The present embodiment provides a kind of LTE D2D communication means being operated in ISM band, as shown in Fig. 1 a to Fig. 1 g, comprises the following steps:
1st step: when wlan system does not have data packet transmission in ISM band, the transmitter D1 in LTE D2D communication system sends a D2D packet to receiver D2, and receiver D2 successfully have received described D2D packet, as shown in Figure 1a.
2nd step: after receiver D2 decoding success D2D packet, and in preassigned time/frequency source block feeding back ACK/NACK signal to (in this section of idle period namely between receiver D2 decoding success D2D packet and feeding back ACK/NACK signal) before transmitter D1, receiver D2 detects the use of wlan system to described preassigned time/frequency source block and (namely detects WLAN RTS/CTS signal, all users in WLAN RTS/CTS semaphore request wlan system signal cover keep a period of time mourn in silence avoid interference), as shown in Figure 1 b.
3rd step: receiver D2 keep mourn in silence, cannot in preassigned time/frequency source block feeding back ACK/NACK signal to transmitter D1; Therefore, transmitter D1 also cannot receive ack/nack signal in preassigned time/frequency source block; Now, transmitter D1, according to existing LTE protocol, thinks " no signal " i.e. " NACK signal ", as illustrated in figure 1 c.
4th step: when transmitter D1 does not receive the ack/nack signal from receiver D2 in preassigned time/frequency source block, transmitter D1 reschedules or applies for time/frequency source block, transmits SREI instruction to receiver D2; Consider that receiver D2 is likely in the state of being mourned in silence by wlan system for a long time, therefore described SREI instruction needs to be launched machine D1 and periodically launches.Transmitting cycle and the emission maximum number of times of SREI instruction can configure according to current specific network condition, as shown in fig. le.
5th step: once receiver D2 can reuse the time/frequency source block of ISM band, namely wlan system stopped communication, then receiver D2 retransmits the last ack/nack signal to respond SREI instruction to transmitter D1, as shown in Figure 1 f.
6th step: after transmitter D1 successfully have received the ack/nack signal of receiver D2 re-transmission, transmitter D1 performs the transmission of corresponding new data packets or old packet retransmission operation according to LTE HARQ protocol, as shown in Figure 1 g.
Embodiment two
The present embodiment provides another kind of wlan system to disturb the scene of LTE system communication, as shown in Fig. 2 a to Fig. 2 c.Compared with embodiment one, in the present embodiment, the terminal D 1 of LTE D2D system and the transmitting-receiving role of D2 there occurs exchange, and namely D2 is transmitter, and D1 is receiver, and other situations are substantially identical.In such cases, the HARQ flow process that LTE standard defines can be summarized as following 3 continuous print processes: 1) when wlan system does not have data packet transmission, transmitter D2 in LTE D2D system sends a D2D packet to receiver D1, and receiver D1 successfully have received described D2D packet.2) after receiver D1 decoding success D2D packet, to need in preassigned time/frequency source block feeding back ACK signal to transmitter D2.Because transmitter D2 is within the signal cover of WLAN, when the ack signal that transmitter D2 reception receiver D1 feeds back in preassigned time/frequency source block, possibly disturb by the communication of wlan system, namely the packet of WLAN and ack signal collide.3) when the packet of WLAN and ack signal there occurs collision, the transmitter D2 of LTE D2D system just correctly cannot receive ack signal from receiver D1, thus causes transmitter D2 initiate once unnecessary data packet retransmission or directly abandon current data packet.Above-mentioned two kinds of reactions, all can cause the waste of Radio Resource.
In the LTE standard of current latest edition, the state of receiver feedback signal has three kinds, is respectively: ack signal, NACK signal and no signal.Be not difficult in the present embodiment to find, the possible state of the receiver D1 feedback signal of LTE D2D system has in fact exceeded three kinds, is respectively: ACK, NACK, ACK but and WLAN data bag collides, NACK but and WLAN data bag collides, the no signal that causes due to other reason.Therefore, when LTE D2D system works is in ISM band, is necessary for it and designs new ACK/NACK signaling process to guarantee efficient frequency of utilization resource.
The present embodiment provides a kind of LTE D2D communication means being operated in ISM band, as shown in Fig. 2 a to Fig. 2 f, comprises the following steps:
1st ' step: when wlan system does not have data packet transmission, the transmitter D2 in LTE D2D system sends a D2D packet to receiver D1, and receiver D1 successfully have received described D2D packet, as shown in Figure 2 a.
2nd ' step: after receiver D1 decoding success D2D packet, to need in preassigned time/frequency source block feeding back ACK/NACK signal to transmitter D2.Because transmitter D2 is within the signal cover of WLAN, when the ack/nack signal that transmitter D2 reception receiver D1 feeds back in preassigned time/frequency source block, disturb by the communication of wlan system, namely the packet of WLAN and ack signal collide, as shown in Figure 2 b.
3rd ' step: when transmitter D2 does not receive the ack/nack signal from receiver D1 in preassigned time/frequency source block, transmitter D2 reschedules or applies for that time/frequency source block transmits SREI instruction to receiver D1, as shown in Figure 2 d.Described SREI instruction is launched machine D2 and periodically launches, until transmitter D2 detects that neighbouring wlan system is communicating or transmitter D2 successfully have received the ack/nack signal that receiver D1 retransmits.Transmitting cycle and the emission maximum number of times of SREI instruction can configure according to current specific network condition.
4th ' step: once receiver D1 have received the SREI instruction that transmitter D2 launches, receiver D1 retransmits the last ack/nack signal to respond SREI instruction to transmitter D2.If the ack/nack signal that receiver D1 retransmits is launched machine D2 and successfully receives, namely wlan system stopped communication, and transmitter D2 stops sending SREI instruction immediately; Otherwise transmitter D2 continues periodically to send SREI instruction, until the emission maximum number of times of pre-configured SREI instruction, as shown in Figure 2 e.
5th ' step: when transmitter D2 successfully have received the ack/nack signal of receiver D1 re-transmission, transmitter D2 performs the transmission of corresponding new data packets or old packet retransmission operation according to LTE HARQ protocol, as shown in figure 2f.
Claims (6)
1. one kind is operated in the LTE D2D communication means of ISM band, it is characterized in that: when correctly receiving the ack/nack signal of described LTE D2D receiver feedback after a LTE D2D transmitter sends packet to a LTE D2D receiver in preassigned time/frequency source block, described LTE D2D transmitter constantly sends SREI instruction to described LTE D2D receiver; Described SREI instruction comprises requirement LTE D2D receiver and retransmits the ack/nack signal that described LTE D2D transmitter correctly do not receive; Before the emission maximum number of times arrival that described SREI indicates, LTE D2D transmitter must periodic transmission SREI instruction, unless LTE D2D transmitter detect neighbouring wlan system communicating or LTE D2D transmitter successfully have received LTE D2D receiver retransmit ack/nack signal.
2. the LTE D2D communication means being operated in ISM band according to claim 1, it is characterized in that: described SREI instruction is by described LTE D2D transmitter periodic transmission, and the transmitting cycle of SREI instruction and emission maximum number of times are according to current specific network condition configuration.
3. the LTE D2D communication means being operated in ISM band according to claim 2, it is characterized in that: when the emission maximum number of times that described SREI indicates has arrived but LTE D2D transmitter does not still correctly receive the ack/nack signal that LTE D2D receiver feeds back, LTE D2D transmitter will be " receiving NACK signal " depending on this situation, and initiate data packet retransmission according to LTE HARQ protocol or abandon current data packet.
4. the LTE D2D communication means being operated in ISM band according to claim 1, it is characterized in that: once LTE D2D receiver successfully receives the SREI instruction that LTE D2D transmitter is launched, then LTE D2D receiver retransmits the ack/nack signal of the last feedback, unless LTE D2D receiver detects that neighbouring wlan system communicates.
5. the LTE D2D communication means being operated in ISM band according to Claims 1-4 any one, it is characterized in that, this communication means specifically comprises the following steps:
1st step, when wlan system does not have data packet transmission in ISM band, the transmitter D1 in LTE D2D communication system sends a D2D packet to receiver D2, and receiver D2 successfully have received described D2D packet;
2nd step, after receiver D2 decoding success D2D packet, and feeding back ACK/NACK signal is to before transmitter D1 in preassigned time/frequency source block, the receiver D2 within the signal cover of WLAN detects the use of wlan system to described preassigned time/frequency source block;
3rd step, receiver D2 keep mourn in silence, cannot in preassigned time/frequency source block feeding back ACK/NACK signal to transmitter D1;
4th step, when transmitter D1 does not receive the ack/nack signal from receiver D2 in preassigned time/frequency source block, transmitter D1 reschedules or applies for time/frequency source block, periodically transmits SREI instruction to receiver D2;
5th step, once receiver D2 can reuse the time/frequency source block of ISM band, namely wlan system stopped communication, then receiver D2 retransmits the last ack/nack signal to respond SREI instruction to transmitter D1;
6th step, after transmitter D1 successfully have received the ack/nack signal of receiver D2 re-transmission, transmitter D1 performs the transmission of corresponding new data packets or old packet retransmission operation according to LTE HARQ protocol.
6. the LTE D2D communication means being operated in ISM band according to Claims 1-4 any one, it is characterized in that, this communication means specifically comprises the following steps:
1st ' step, when wlan system does not have data packet transmission, the transmitter D2 in LTE D2D system sends a D2D packet to receiver D1, and receiver D1 successfully have received described D2D packet;
2nd ' step, after receiver D1 decoding success D2D packet, to need in preassigned time/frequency source block feeding back ACK/NACK signal to transmitter D2; Transmitter D2 within the signal cover of WLAN when receiving the ack/nack signal that receiver D1 feeds back in preassigned time/frequency source block disturb by the communication of wlan system;
3rd ' step, transmitter D2 reschedules or applies for that time/frequency source block periodically transmits SREI instruction to receiver D1;
4th ' step: once receiver D1 have received the SREI instruction that transmitter D2 launches, then receiver D1 retransmits the last ack/nack signal to respond SREI instruction to transmitter D2; If the ack/nack signal that receiver D1 retransmits is launched machine D2 and successfully receives, then transmitter D2 stops sending SREI instruction immediately; Otherwise transmitter D2 continues periodically to send SREI instruction, until reach the emission maximum number of times of SREI instruction;
5th ' step: when transmitter D2 successfully have received the ack/nack signal of receiver D1 re-transmission, transmitter D2 performs the transmission of corresponding new data packets or old packet retransmission operation according to LTE HARQ protocol.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102045339B1 (en) * | 2013-04-26 | 2019-11-15 | 삼성전자 주식회사 | Method and apparatus for indicating discovery signal resources in device-to-device wireless communications |
| CN105453472B (en) * | 2013-09-10 | 2019-09-03 | 华为技术有限公司 | A kind of mixed automatic retransmission request method, apparatus and system |
| CN104734802B (en) * | 2013-12-19 | 2019-04-12 | 上海朗帛通信技术有限公司 | Dispatching method and device in a kind of D2D communication |
| KR101835248B1 (en) * | 2014-01-30 | 2018-03-06 | 엘지전자 주식회사 | D2d operation method performed by terminal in wireless communication system and terminal using same |
| CN106162681B (en) * | 2015-03-24 | 2019-10-01 | 中国移动通信集团公司 | A kind of detection method and device of GSM900 second harmonic interference |
| EP3281327A4 (en) * | 2015-04-08 | 2018-11-21 | Telefonaktiebolaget LM Ericsson (PUBL) | A wireless device and method therein for performing aretransmission of data in a device-to-device, d2d, communication |
| DE102017203905B4 (en) | 2016-12-22 | 2022-11-10 | Volkswagen Aktiengesellschaft | Method for organizing communication between mobile radio network subscriber stations in a mobile radio cell, as well as mobile radio network subscriber station and mobile radio network management unit when using the method according to the invention |
| CN106535203A (en) * | 2017-01-10 | 2017-03-22 | 河海大学 | Method of D2D and WLAN to share ISM spectrum |
| CN111050368A (en) * | 2019-12-24 | 2020-04-21 | Oppo（重庆）智能科技有限公司 | Network transmission control method, device, terminal equipment and storage medium |
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| CN102075950A (en) * | 2011-01-07 | 2011-05-25 | 哈尔滨工程大学 | Multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) cognitive radio communication method |
| CN102083211A (en) * | 2010-03-29 | 2011-06-01 | 大唐移动通信设备有限公司 | Determining method and equipment of uplink control channel resources |
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| CN102083211A (en) * | 2010-03-29 | 2011-06-01 | 大唐移动通信设备有限公司 | Determining method and equipment of uplink control channel resources |
| CN102075950A (en) * | 2011-01-07 | 2011-05-25 | 哈尔滨工程大学 | Multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) cognitive radio communication method |
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