CN103825687B - Signal transmission method for the device-to-device communication under cellular network - Google Patents
Signal transmission method for the device-to-device communication under cellular network Download PDFInfo
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- CN103825687B CN103825687B CN201210468958.4A CN201210468958A CN103825687B CN 103825687 B CN103825687 B CN 103825687B CN 201210468958 A CN201210468958 A CN 201210468958A CN 103825687 B CN103825687 B CN 103825687B
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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
- H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
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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
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1893—Physical mapping arrangements
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a kind of signal transmission method for the device-to-device communication being applied under cellular network.Particularly, the invention provides a kind of HARQ transmission method for the device-to-device communication being applied under cellular network.By the HARQ transmission scheme of the application present invention, HARQ transmission can be effectively realized, while and can keeps backwards compatibility.
Description
Technical field
The application is related to the device-to-device communication under communication system, more particularly to cellular network.
Background technology
In recent years, the communication pattern of device-to-device (device-to-device, D2D) is suggested.The device-to-device
Communication pattern be short distance service different from conventional cellular communication pattern.For conventional cellular communication system, even if user
The distance between equipment is close, and the communication between them should also be as by RAN and core network node (including base station etc.)
Processing.For above-mentioned application scenarios (namely distance is close between communication participant), communicated to save cell resource and reduce
Delay, the D2D communication systems of honeycomb control are introduced as the potential short-distance techniques of LTE-A.At present, 3GPP has been initiated
New research project is to develop the D2D technology relevant criterions for adjacent service.
For conventional cellular communication system, communication between the user equipment of same cell should by the scheduling of base station and
Transmission/reception., being capable of direct communication between two user equipmenies in D2D communications.Obviously, existing HARQ transmission mechanism is simultaneously
Suitably D2D can not be supported to communicate.Therefore, it is necessary to provide a kind of the effective of D2D communications being applied under cellular infrastructure
HARQ mechanism, while and can keep backwards compatibility.
The content of the invention
In conventional cellular communication, if user equipment A wants to send data to user equipment B, then, user equipment first
A is down forwarding the data to user equipment B in uplink data sending to base station, then base station.Therefore, in uplink and downlink point
Two independent HARQ procedures are not had.
The step of traditional HARQ mechanism in cellular communication, is as follows：
Ascending HARQ transmits
Step 1：User equipment A sends dispatch request to base station.
Step 2：Base station sends PDCCH (Physical Downlink Control Channel) to user equipment A in (n1) individual subframe.
Step 3：User equipment A sends data to base station in (n1+k1) individual subframe in the frequency resource distributed.
Step 4：For non-self-adapting HARQ, base station is in (n1+k1+k2) individual subframe in PHICH (physics HARQ instruction letters
Road) on send HARQ ACK/NACK to user equipment A；For adaptive HARQ, base station exists in (n1+k1+k2) individual subframe
HARQ ACK/NACK to user equipment A are sent on PDCCH.
Step 5：User equipment A receives HARQACK/NACK on PHICH or PDCCH.If user equipment A is in PDCCH
On receive NACK, then user equipment A retransmits the number in (n1+k1+k2+k3) individual subframe in newly assigned frequency resource
According to base station；If user equipment A receives NACK on PHICH, then user equipment is in (n1+k1+k2+k3) individual subframe
The data are retransmitted in original frequency resource to base station.
Step 6：4 to 5 are repeated the above steps until base station correctly decodes out the data.
Descending HARQ transmission
Step 1：Base station forward the data to user equipment B in (n2) individual subframe.
Step 2：If user equipment B has data to need to transmit on PUSCH (Physical Uplink Shared Channel), then user
Equipment B sends HARQ ACK/NACK to base station in (n2+k4) individual subframe on PUSCH；If user equipment B does not have data
Need to transmit on PUSCH, then user equipment B is sent out in (n2+k4) individual subframe on PUCCH (Physical Uplink Control Channel)
HARQ ACK/NACK are sent to base station.
Step 3：Base station receives HARQ ACK/NACK.If HARQ feedback is NACK, then base station is at (n2+k4+k5)
Individual subframe retransmits the data to user equipment B.
Step 4：2 to 3 are repeated the above steps until user equipment B correctly decodes out the data.
In conventional cellular communication, HARQ feedback is designed to only between the user equipment and the base station.And communicated in D2D
In, because user equipment A directly can be communicated with user equipment B, therefore, main challenge is：How to utilize existing
Data channel or control channel feed back HARQ ACK/NACK between user equipment A and B, while again to existing in cellular communication
HARQ mechanism produce less influence.
Considered based on above-mentioned, the present invention proposes a kind of HARQ transmission method for the D2D communications being applied under cellular network
And other signal transmission methods.
A kind of one embodiment according to an aspect of the present invention, it is proposed that device-to-device being used under cellular network
The HARQ transmission method of communication, wherein, the cellular network includes base station and the first use based on device-to-device communication
Family equipment and second user equipment, the described method comprises the following steps：A. by first user equipment in the resource distributed
On send data to the second user equipment；B. received by first user equipment on PDCCH or PHICH by the base
Stand forwarding HARQ feedback；C. if the HARQ feedback is NACK signalings and the NACK signalings are received on PDCCH, then
The data are retransmitted in newly assigned resource by first user equipment；If the HARQ feedback be NACK signalings and
The NACK signalings are received on PHICH, then the data are retransmitted in the resource originally distributed by first user equipment.
Favourable, the step b also includes：Received by first user equipment by the equipment that the base station provides to setting
Standby communication configured information, wherein, the device-to-device communication configured information is used to indicate that the HARQ feedback is to be directed to equipment
Arrive equipment communication.
According to another embodiment of the invention, it is proposed that a kind of device-to-device communication being used under cellular network
HARQ transmission method, wherein, the cellular network includes base station and the first user equipment based on device-to-device communication
With second user equipment, the described method comprises the following steps：A. received by the second user equipment and come from first user
The data of equipment simultaneously decode to the data；B. if the second user equipment currently has data to need on PUSCH
Transmission, then send HARQ feedback to the base station by the second user equipment on PUSCH；If the second user equipment
Need to transmit on PUSCH currently without data, then HARQ feedback is sent on PUCCH to described by the second user equipment
Base station.
Favourable, the step B also includes：Device-to-device communication configured information is provided by the second user equipment extremely
The base station, the device-to-device communication configured information are used to indicate that the HARQ feedback is communicated for device-to-device
's.
According to still another embodiment of the invention, it is proposed that a kind of device-to-device communication being used under cellular network
HARQ transmission method, wherein, the cellular network includes base station and the first user equipment based on device-to-device communication
With second user equipment, the described method comprises the following steps：I. received by the base station from the second user equipment
HARQ feedback；Ii. if the HARQ feedback is NACK signalings and corresponds to adaptive HARQ, then by the base station in PDCCH
It is upper to forward the HARQ feedback to first user equipment；If the HARQ feedback is NACK signalings and corresponded to non-adaptive
HARQ and semi-static HARQ are answered, then the HARQ feedback is forwarded on PHICH to first user equipment by the base station；
Iii. if the HARQ feedback is ACK signalings, the HARQ feedback is forwarded on PHICH to the described first use by the base station
Family equipment.
Favourable, the step i also includes：The equipment provided by the second user equipment is received to setting by the base station
Standby communication configured information；The step ii also includes：Device-to-device, which is provided, by the base station communicates configured information to described the
One user equipment；The step iii also includes：Device-to-device communication configured information is provided to the described first use by the base station
Family equipment；Wherein, the device-to-device communication configured information is used to indicate that the HARQ feedback is led to for device-to-device
Letter.
According to still another embodiment of the invention, it is proposed that a kind of device-to-device communication being used under cellular network
HARQ transmission method, wherein, the cellular network includes base station and the first user equipment based on device-to-device communication
With second user equipment, the described method comprises the following steps：I. sent on the assigned resource by first user equipment
Data are to the second user equipment；II. received by first user equipment on PUSCH or PDCCH from described second
The HARQ feedback of user equipment；III. if the HARQ feedback is NACK signalings, then by first user equipment original
The data are retransmitted in the resource of distribution；IV. if the HARQ feedback is ACK signalings, then led to by first user equipment
Know that the base station discharges distributed resource.
Favourable, the step II also includes：Received by first user equipment and provided by the second user equipment
Device-to-device communication configured information, wherein, device-to-device communication configured information is used to indicate the HARQ feedback
It is to be communicated for device-to-device.
According to still another embodiment of the invention, it is proposed that a kind of device-to-device communication being used under cellular network
HARQ transmission method, wherein, the cellular network includes base station and the first user equipment based on device-to-device communication
With second user equipment, the described method comprises the following steps：M. received by the second user equipment and come from first user
The data of equipment simultaneously decode to the data；N. if the second user equipment currently has data to need on PUSCH
Transmission, then send HARQ feedback to first user equipment by the second user equipment on PUSCH；If described second
User equipment needs to transmit on PUSCH currently without data, then it is anti-HARQ to be sent on PUCCH by the second user equipment
It is fed to first user equipment.
Favourable, the step n also includes：Device-to-device communication configured information is provided by the second user equipment extremely
First user equipment, device-to-device communication configured information are used to indicating that the HARQ feedback to be to setting for equipment
Standby communication.
According to still another embodiment of the invention, it is proposed that a kind of device-to-device communication being used under cellular network
HARQ transmission method, wherein, the cellular network includes base station and the first user equipment based on device-to-device communication
With second user equipment, the described method comprises the following steps：X. sent on the assigned resource by first user equipment
Data are to the second user equipment；Y. it is anti-the HARQ from the second user equipment to be received by first user equipment
Feedback；Z. if the HARQ feedback is NACK signalings and first user equipment obtains newly assigned money from the base station
Source, then retransmit the data in the newly assigned resource by first user equipment；If the HARQ feedback is
NACK signalings and first user equipment do not obtain newly assigned resource from the base station, then are existed by first user equipment
The data are retransmitted in the resource originally distributed.
Favourable, the step y also includes：Receive what is provided by the second user equipment by first user equipment
Device-to-device communication configured information, wherein, the device-to-device communication configured information is used to indicate that the HARQ feedback is
For device-to-device communication.
According to still another embodiment of the invention, it is proposed that a kind of device-to-device communication being used under cellular network
HARQ transmission method, wherein, the cellular network includes base station and the first user equipment based on device-to-device communication
With second user equipment, the described method comprises the following steps：M. received by the second user equipment and come from first user
The data of equipment simultaneously decode to the data；N. if the second user equipment currently has data to need on PUSCH
Transmission, then send HARQ feedback to the base station and first user equipment by the second user equipment on PUSCH；Such as
Second user equipment described in fruit needs to transmit on PUSCH currently without data, then by the second user equipment on PUCCH
HARQ feedback is sent to the base station and first user equipment.
Favourable, the step N also includes：Device-to-device communication configured information is provided by the second user equipment extremely
The base station and first user equipment, the device-to-device communication configured information are used to indicate that the HARQ feedback is pin
To device-to-device communication.
According to still another embodiment of the invention, it is proposed that a kind of device-to-device communication being used under cellular network
HARQ transmission method, wherein, the cellular network includes base station and the first user equipment based on device-to-device communication
With second user equipment, the described method comprises the following steps：X. received by the base station from the second user equipment
HARQ feedback；Y. if the HARQ feedback is NACK signalings and to correspond to adaptive HARQ, then from the base station to described the
One user equipment provides newly assigned resource；If the HARQ feedback is NACK signalings and corresponds to non-self-adapting HARQ and half
Static HARQ, then the base station is not to the newly assigned resource of first user equipment offer.
Favourable, the step X also includes：The equipment provided by the second user equipment is received to setting by the base station
Standby communication configured information, wherein, the device-to-device communication configured information is used to indicate that the HARQ feedback is to be directed to equipment
Arrive equipment communication.
According to another aspect of the present invention, there is provided a kind of signaling for the device-to-device communication being used under cellular network passes
Transmission method, wherein, the cellular network includes base station and the first user equipment and second based on device-to-device communication
User equipment, it the described method comprises the following steps：Signaling is sent to the base station by the second user equipment；Wherein, it is described
Signaling includes following any：CQI, CSI, PMI, order instruction, buffer status reporting and RRC signaling.
Various aspects of the invention will be become apparent from by the explanation of embodiment in detail below.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, of the invention is above-mentioned
And other features will become more apparent：
Fig. 1 shows the network topological diagram of the D2D communications according to an embodiment of the invention under cellular network；
Fig. 2 shows HARQ transmission method flow chart according to an embodiment of the invention；
Fig. 3 shows HARQ transmission method flow chart according to another embodiment of the invention；And
Fig. 4 shows HARQ transmission method flow chart according to still another embodiment of the invention.
Same or similar accompanying drawing mark represents same or similar part in accompanying drawing.
Embodiment
Each embodiment of invention is described in detail below in conjunction with accompanying drawing.
Communicated for the D2D under cellular network, in order to realize the correct communication between user equipment, it is necessary to define extra
Configured information be used for indicate this HARQ transmission be for device-to-device communicate or for cellular communication.It can
Realized by two ways：
(1) the reservation bit position in existing PDCCH, PUCCH, PHICH and PUSCH is used as indication bit.For example, can
Indicate that this HARQ transmission is for the HARQ transmission of device-to-device communication or for honeycomb using 1 bit therein
The HARQ transmission of communication.
(2) distinguished by subframe/frequency/antenna port/sequence.For example, definable subframe 1 is exclusively used in device-to-device
HARQ transmission, and other subframes be used for cellular communication HARQ transmission.In another example some special frequency resources of definable are used for
The HARQ transmission of device-to-device, and other frequency resources are used for the HARQ transmission of cellular communication.In another example different sequences can be passed through
Line skew is directed to the HARQ transmission of cellular communication or the HARQ transmission for cellular communication to distinguish.
Below to indicate this HARQ using the reservation bit position in existing PDCCH, PUCCH, PHICH and PUSCH
Transmission is exemplified by the HARQ transmission of device-to-device or the HARQ transmission of cellular communication and combines Fig. 1 network topological diagram to this
Each embodiment of invention is described.
Fig. 1 network topology includes base station 30, the first user equipment 10 and second user equipment based on D2D communications
20, and the 3rd user equipment 40 and fourth user equipment 50 based on cellular communication.
Embodiment 1
In the present embodiment, HARQ feedback passes through two steps：Second user equipment 20 is to base station 30 and base station 30 to the first
User equipment 10.
Reference picture 2, in the step s 21, the first user equipment 10 send dispatch request to base station 30.
After base station 30 receives the dispatch request from the first user equipment 10, in step S22, base station 30 is at (n1)
Individual subframe sends PDCCH to the first user equipment 10 and second user equipment 20, is distributed for being designated as the first user equipment 10
Resource.
In step S23, the first user equipment 10 is sent data on the assigned resource in (n1+k1) individual subframe
Second user equipment 20.
After second user equipment 20 receives the data from the first user equipment 10, in step s 24, second user
Equipment 20 is decoded to the data and sends HARQ feedback in (n1+k1+k2) individual subframe and provide device-to-device communication
Configured information is to base station 30.Specifically, if second user equipment 20 currently has data to need to transmit on PUSCH, this
Two user equipmenies 20 send HARQ feedback to base station 30 on PUSCH and set the indication bit position in PUSCH (for example, should
0) indication bit is arranged to indicate that the HARQ feedback communicates for device-to-device；If second user equipment 20 is current
There is no data to need to transmit on PUSCH, then the second user equipment 20 sends HARQ feedback on PUCCH and to base station 30 and set
The indication bit position (for example, the indication bit is arranged to 0) in PUCCH is put to indicate that the HARQ feedback is to setting for equipment
Standby communication.
After base station 30 receives HARQ feedback and device-to-device configured information from second user equipment 20, in step
In S25, if HARQ feedback is NACK signalings and corresponds to adaptive HARQ, base station 30 is in (n1+k1+k2+k3) height
Frame forwards the HARQ feedback to the first user equipment 10 on PDCCH and sets the indication bit position in PUCCH (for example, should
0) indication bit is arranged to indicate that the HARQ feedback communicates for device-to-device；If HARQ feedback is NACK signalings
And corresponding to non-self-adapting HARQ and semi-static HARQ, then base station 30 forwards in (n1+k1+k2+k3) individual subframe on PHICH
The HARQ feedback is to the first user equipment 10 and sets the indication bit position (for example, the indication bit is arranged into 0) in PHICH
To indicate that the HARQ feedback communicates for device-to-device；If HARQ feedback is ACK signalings, base station 30 is in PHICH
Upper forwarding HARQ feedback to the first user equipment 10 and sets the indication bit position in PHICH (for example, the indication bit is set
For 0) come indicate the HARQ feedback for device-to-device communicate.
First user equipment 10 receives the HARQ feedback that is forwarded by base station 30 on PDCCH or PHICH and by base station 30
After the device-to-device configured information of offer, in step S26, if HARQ feedback is NACK signalings and the first user equipment 10
The NACK signalings are received on PDCCH, then first user equipment 10 in (n1+k1+k2+k3+k4) individual subframe in PDCCH
The data are retransmitted in the newly assigned resource of middle instruction；If HARQ feedback is NACK signalings and the first user equipment 10 exists
NACK signalings are received on PHICH, then first user equipment 10 distributed in (n1+k1+k2+k3+k4) individual subframe originally
Resource on retransmit the data.
S24-S26 repeat the above steps until second user equipment 20 correctly decodes the data.
In the present embodiment, the link for second user equipment 20 to base station 30, used up channel PUCCH or
PUSCH feeds back HARQ ACK/NACK；For the link of the user equipment of base station 30 to the first 10, down channel PHICH has been used
Or PDCCH feeds back HARQ ACK/NACK.That is, the technical scheme of the present embodiment reused existing control channel or
Data channel feeds back HARQ ACK/NACK, without extra channel overhead.
Embodiment 2
In the application scenarios of some such as semi-persistent schedulings, base station provides the frequency fixed for whole HARQ course allocations
Source, that is to say, that in each retransmit, base station will not redistribute the resource of scheduling.Further, since the framework of D2D transmission is extremely
The present not yet determines, therefore base station is also possible to not control or only partly controls the resource of the scheduling for D2D transmission.Based on this,
In the present embodiment, it is proposed that directly from the HARQ feedback mechanism of the user equipment 10 of second user equipment 20 to the first.
Reference picture 3, in step S31, the first user equipment 10 sends dispatch request to base station 30.
After base station 30 receives the dispatch request from the first user equipment 10, in step s 32, base station 30 is at (n1)
Individual subframe sends PDCCH to the first user equipment 10 and second user equipment 20, is distributed for being designated as the first user equipment 10
Resource.
In step S33, the first user equipment 10 is sent data on the assigned resource in (n1+k1) individual subframe
Second user equipment 20.
After second user equipment 20 receives the data from the first user equipment 10, in step S34, second user
Equipment 20 is decoded to the data and sends HARQ feedback in (n1+k1+k2) individual subframe and provide device-to-device communication
Configured information is to the first user equipment 10.Specifically, if second user equipment 20 currently has data to need to upload in PUSCH
Defeated, then the second user equipment 20 sends HARQ feedback to the first user equipment 10 on PUSCH and sets the instruction in PUSCH
Bit (for example, the indication bit is arranged to 0) come indicate the HARQ feedback for device-to-device communicate；If the
Two user equipmenies 20 need to transmit on PUSCH currently without data, then the second user equipment 20 sends HARQ on PUCCH
Feed back to the first user equipment 10 and set the indication bit position (for example, the indication bit is arranged into 0) in PUCCH to indicate
The HARQ feedback communicates for device-to-device.
First user equipment 10 receives the HARQ feedback from second user equipment 20 and set on PUSCH or PDCCH
It is standby arrive equipment configured information after, in step s 35, if the HARQ feedback is NACK signalings, the first user equipment 10 is the
(n1+k1+k2+k3) individual subframe retransmits the data in the resource originally distributed；If the HARQ feedback is ACK signalings, the
One user equipment 10 notice base station 30 discharges distributed resource.
S34-S35 repeat the above steps until second user equipment 20 correctly decodes the data.
In the present embodiment, HARQ ACK/NACK are directly to be sent from second user equipment 20 to the first user equipment 10
And the first user equipment 10 retransmitted without waiting for the schedule information from base station 30, therefore, compared to above-mentioned implementation
HARQ transmission mechanism in example 1, the HARQ transmission mechanism in the present embodiment have less time delay.But in the present embodiment
HARQ transmission mechanism is changed relative to the HARQ transmission of existing cellular network with some, in cellular communications, the first user
Equipment receives HARQ ACK/NACK on PDCCH or PHICH, and in the HARQ mechanism of the present embodiment, the first user equipment 10
HARQ ACK/NACK are received on PUSCH or PUCCH.
Embodiment 3
In the present embodiment, second user equipment 20 sends HARQ feedback to the He of the first user equipment 10 in a broadcast manner
Base station 30.
Reference picture 4, in step S41, the first user equipment 10 sends dispatch request to base station 30.
After base station 30 receives the dispatch request from the first user equipment 10, in step S42, base station 30 is at (n1)
Individual subframe sends PDCCH to the first user equipment 10 and second user equipment 20, is distributed for being designated as the first user equipment 10
Resource.
In step S43, the first user equipment 10 is sent data on the assigned resource in (n1+k1) individual subframe
Second user equipment 20.
After second user equipment 20 receives the data from the first user equipment 10, in step S44, second user
Equipment 20 is decoded to the data and sends HARQ feedback with broadcast mode in (n1+k1+k2) individual subframe and provide equipment
To equipment communication configured information to the user equipment 10 of base station 30 and first.Specifically, if second user equipment 20 currently has number
According to needing to transmit on PUSCH, then the second user equipment 20 sends HARQ feedback to the user of base station 30 and first on PUSCH
Equipment 10 simultaneously sets the indication bit position (for example, the indication bit is arranged into 0) in PUSCH to indicate that the HARQ feedback is pin
To device-to-device communication；If second user equipment 20 needs to transmit on PUSCH currently without data, second use
Family equipment 20 sends HARQ feedback to the user equipment 10 of base station 30 and first on PUCCH and sets the indication bit in PUCCH
Position (for example, the indication bit is arranged to 0) come indicate the HARQ feedback for device-to-device communication.
After base station 30 receives HARQ feedback and device-to-device configured information from second user equipment 20, in step
In S45, if HARQ feedback is NACK signalings and corresponds to adaptive HARQ, base station 30 is in (n1+k1+k2+k3) height
Frame sends PDCCH to the first user equipment 10, for providing newly assigned resource to the first user equipment 10；If HARQ feedback
For NACK signalings and correspond to non-self-adapting HARQ and semi-static HARQ, then base station 30 does not send PDCCH to the first user equipment
10, namely do not provide newly assigned resource to the first user equipment 10.
First user equipment 10 receives HARQ feedback and device-to-device configured information from second user equipment 20
Afterwards, in step S46, if HARQ feedback be NACK signalings and the first user equipment 10 from base station 30 receive PDCCH (
That is, the first user equipment 10 obtains newly assigned resource from base station 30), then first user equipment 10 is in (n1+k1+k2+
K3+k4) individual subframe retransmits the data in newly assigned resource；If HARQ feedback is NACK signalings and the first user equipment 10
Do not receive PDCCH (that is, the first user equipment 10 does not obtain newly assigned resource from base station 30) from base station 30, then this first
User equipment 10 retransmits the data in (n1+k1+k2+k3+k4) individual subframe in the resource originally distributed.
S44-S46 repeat the above steps until second user equipment 20 correctly decodes the data.
In the present embodiment, second user equipment 20 broadcasts HARQ ACK/NACK to the user equipment 10 of base station 30 and first,
Therefore, base station 30 need not forward HARQ ACK/NACK to the first user equipment 10.Passed compared to the HARQ in above-described embodiment 1
Defeated mechanism, the present embodiment save a control channel resource.But the HARQ transmission mechanism in the present embodiment is relative to existing
Cellular network HARQ transmission with some change, in cellular communications, the first user equipment connects on PDCCH or PHICH
HARQ ACK/NACK are received, and in the HARQ mechanism of the present embodiment, the first user equipment 10 receives on PUSCH or PUCCH
HARQ ACK/NACK。
According to another aspect of the present invention, a kind of signaling for the device-to-device communication being used under cellular network is additionally provided
Transmission method.This method comprises the following steps：Signaling is sent to base station 30 by second user equipment 20；Wherein, the signaling includes
It is any below：CQI, CSI, PMI, order instruction, buffer status reporting and RRC signaling etc..Base station 30 knows these signaling informations
Be advantageous to strengthening system system energy.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be it is nonrestrictive, should not by claim appoint
What reference is considered as the involved claim of limitation.In addition, it will be evident that the word of " comprising " one is not excluded for other elements or step
Suddenly, the word of "one" before element one is not excluded for including " multiple " element.The multiple element stated in claim to a product
It can be realized by an element by software or hardware.The first, the second grade word is used for representing title, and is not offered as appointing
What specific order.
Claims (6)
1. a kind of HARQ transmission method for the device-to-device communication being used under cellular network, wherein, wrapped in the cellular network
Including base station and the first user equipment to be communicated based on device-to-device and second user equipment, methods described includes following step
Suddenly：
A. the second user equipment is directly sent data to by first user equipment on the assigned resource；
B. received by first user equipment on PDCCH or PHICH by the base station forward for the equipment to setting
The HARQ feedback of standby communication；
C. if the HARQ feedback is NACK signalings and the NACK signalings are received on PDCCH, then used by described first
Family equipment retransmits the data in newly assigned resource；If the HARQ feedback is NACK signalings and received on PHICH
To the NACK signalings, then the data are retransmitted in the resource originally distributed by first user equipment.
2. according to the method for claim 1, it is characterised in that the step b also includes：Connect by first user equipment
The device-to-device communication configured information provided by the base station is provided, wherein, the device-to-device communication configured information is used for
Indicate that the HARQ feedback communicates for device-to-device.
3. a kind of HARQ transmission method for the device-to-device communication being used under cellular network, wherein, wrapped in the cellular network
Including base station and the first user equipment to be communicated based on device-to-device and second user equipment, methods described includes following step
Suddenly：
I. the second user equipment is directly sent data to by first user equipment on the assigned resource；
II. being set for described from the second user equipment is received on PUSCH or PDCCH by first user equipment
The standby HARQ feedback for arriving equipment communication；
III. if the HARQ feedback is NACK signalings, then retransmitted by first user equipment in the resource originally distributed
The data；
IV. if the HARQ feedback is ACK signalings, then the base station release as described in first notification of user equipment is distributed
Resource.
4. according to the method for claim 3, it is characterised in that the step II also includes：By first user equipment
The device-to-device communication configured information provided by the second user equipment is provided, wherein, the device-to-device communication refers to
Show that information is used to indicate that the HARQ feedback communicates for device-to-device.
5. a kind of HARQ transmission method for the device-to-device communication being used under cellular network, wherein, wrapped in the cellular network
Including base station and the first user equipment to be communicated based on device-to-device and second user equipment, methods described includes following step
Suddenly：
X. the second user equipment is directly sent data to by first user equipment on the assigned resource；
Y. received by first user equipment and be directed to what the device-to-device communicated from the second user equipment
HARQ feedback；
Z. if the HARQ feedback is NACK signalings and first user equipment obtains newly assigned money from the base station
Source, then retransmit the data in the newly assigned resource by first user equipment；If the HARQ feedback is
NACK signalings and first user equipment do not obtain newly assigned resource from the base station, then are existed by first user equipment
The data are retransmitted in the resource originally distributed.
6. according to the method for claim 5, it is characterised in that the step y also includes：Connect by first user equipment
The device-to-device communication configured information provided by the second user equipment is provided, wherein, the device-to-device communication instruction
Information is used to indicate that the HARQ feedback communicates for device-to-device.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468958.4A CN103825687B (en) | 2012-11-19 | 2012-11-19 | Signal transmission method for the device-to-device communication under cellular network |
| TW102138261A TW201424442A (en) | 2012-11-19 | 2013-10-23 | Method of transmitting signaling of device-to-device communication in cellular network |
| PCT/IB2013/002559 WO2014076552A2 (en) | 2012-11-19 | 2013-10-28 | Method of transmitting signaling of device-to-device communication in cellular network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468958.4A CN103825687B (en) | 2012-11-19 | 2012-11-19 | Signal transmission method for the device-to-device communication under cellular network |
Publications (2)
| Publication Number | Publication Date |
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| CN103825687A CN103825687A (en) | 2014-05-28 |
| CN103825687B true CN103825687B (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210468958.4A Active CN103825687B (en) | 2012-11-19 | 2012-11-19 | Signal transmission method for the device-to-device communication under cellular network |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103825687B (en) |
| TW (1) | TW201424442A (en) |
| WO (1) | WO2014076552A2 (en) |
Cited By (1)
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| RU2768371C1 (en) * | 2018-12-29 | 2022-03-24 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Method, device and data transmission system for direct communication |
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| BR112017014358A2 (en) | 2014-12-31 | 2018-04-10 | Huawei Technologies Co., Ltd. | A method and apparatus for transmitting resource request |
| US20180091263A1 (en) * | 2015-04-08 | 2018-03-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Wireless device and method therein for performing a retransmission of data in a device-to-device, d2d, communication |
| EP3573315B1 (en) | 2017-02-10 | 2020-08-12 | Huawei Technologies Co., Ltd. | Methods for data transmission and related devices |
| CN108512576A (en) * | 2017-02-28 | 2018-09-07 | 华为技术有限公司 | A kind of method and device for realizing user equipment cooperation |
| ES2968362T3 (en) | 2017-07-13 | 2024-05-09 | Koninklijke Philips Nv | Feedback communication device, system and method |
| WO2020051754A1 (en) * | 2018-09-10 | 2020-03-19 | Oppo广东移动通信有限公司 | Method for feedback information transmission, method for data retransmission, and device |
| US20220007403A1 (en) * | 2018-09-27 | 2022-01-06 | Convida Wireless, Llc | Uu based sidelink control for nr v2x |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2014076552A3 (en) | 2014-10-16 |
| TW201424442A (en) | 2014-06-16 |
| WO2014076552A2 (en) | 2014-05-22 |
| CN103825687A (en) | 2014-05-28 |
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