CN106792890B - D2D directly has found the selection method and system of resource - Google Patents
D2D directly has found the selection method and system of resource Download PDFInfo
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- CN106792890B CN106792890B CN201610620980.4A CN201610620980A CN106792890B CN 106792890 B CN106792890 B CN 106792890B CN 201610620980 A CN201610620980 A CN 201610620980A CN 106792890 B CN106792890 B CN 106792890B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/23—Manipulation of direct-mode connections
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Abstract
A kind of D2D directly has found that the selection method and system of resource, the selection method include: the direct discovery resource pool that distance terminal and link terminal receive base station configuration respectively, and the distance terminal is narrowband terminal；The link terminal directly finds to determine discovery transfer resource in resource pool described, and on identified discovery transfer resource, it directly gives out information to distance terminal transmission, the direct terminal type and identification information to give out information including the link terminal；The distance terminal receives described direct give out information in the resource of the direct discovery resource pool.Above scheme can ensure that narrowband terminal normally carries out the direct discovery procedure of D2D.
Description
Technical field
The present invention relates to selection methods and system that wireless communication field more particularly to a kind of D2D directly have found resource.
Background technique
In recent years, third generation cooperative partner program (The 3rdGeneration Partnership Project, 3GPP)
The rapid development of long term evolution (Long Term Evolution, LTE) technology, has been widely applied to each technical field.Terminal
Straight-through (Device to Device, D2D) technology refers under a kind of control of communication system, allows user equipment (User
Equipment, UE) between the technology that is directly communicated by reuse pattern resource.D2D technology can increase cellular communication system
System spectrum efficiency, reduces UE transmission power, solves the problems, such as that wireless communication system frequency spectrum resource is deficient to a certain extent.
With the development of technology of Internet of things, intelligent terminal is more universal.For the development for accelerating technology of Internet of things, 3GPP
In R13 version, be proposed enhanced machine type communication (enhanced Machine Type Communications,
EMTC)/narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) technology.
In the R12 version and R13 version of 3GPP, D2D technology only supports broadband data transmission.Draw in R13 version
The eMTC/NB-IoT technology entered only supports narrow band data to transmit, and therefore, eMTC UE and NB-IoT UE can be described as narrowband end again
End.The corresponding bandwidth of eMTC UE is 1.4MHz, at most in 6 Physical Resource Block (Physical in same subframe
Resource Block, PRB) resource in sending and receiving data；The corresponding bandwidth of NB-IoT UE is 180KHz, in same subframe
It is limited in sending and receiving data in the resource of most PRB.
In the prior art, in the direct discovery procedure of the terminal of D2D, used transfer resource pond and reception resource pool are all
It is configured based on broadband transmission, narrowband terminal uses the direct discovery procedure of existing D2D, possibly can not receive required number
According to.
Summary of the invention
Present invention solves the technical problem that being that narrowband terminal how to be made to be able to carry out the direct discovery procedure of normal D2D.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of D2D selection method for directly finding resource, packet
Include: distance terminal and link terminal receive the direct discovery resource pool that base station configures respectively, and the distance terminal is that narrowband is whole
End；The link terminal directly finds to determine discovery transfer resource in resource pool described, and transmits and provide in identified discovery
On source, the transmission of Xiang Suoshu distance terminal directly gives out information, described direct to give out information including the link terminal
Terminal type and identification information；The distance terminal receives the direct hair in the resource of the direct discovery resource pool
Now give out information.
Optionally, the link terminal directly finds to determine discovery transfer resource in resource pool described, comprising: in described
Receive the first RRC signaling of base station configuration after terminal, include in first RRC signaling base station configuration it is described in
After the dedicated discovery transfer resource of terminal, the dedicated discovery transfer resource is the resource directly found in resource pool；Institute
It states link terminal and reads first RRC signaling, therefrom obtain the dedicated discovery transfer resource of the base station configuration, as
Identified discovery transfer resource.
Optionally, the link terminal directly finds to determine discovery transfer resource in resource pool described, comprising: in described
It is directly found in resource pool after terminal from described, randomly chooses part resource as identified discovery transfer resource.
Optionally, the distance terminal receives the direct discovery publication in the resource of the direct discovery resource pool and disappears
Breath, comprising: the distance terminal receives the second RRC signaling of the base station configuration, includes the base in second RRC signaling
The discovery configured of standing receives resource；The distance terminal reads second RRC signaling, therefrom obtains the discovery and receives money
Source, and received in accessed discovery and receive described direct give out information in resource.
Optionally, the distance terminal receives the direct discovery publication in the resource of the direct discovery resource pool and disappears
Breath, comprising: the distance terminal monitors the direct discovery resource pool, receives described direct give out information.
Optionally, when the distance terminal is NB-IoT terminal, the corresponding directly discovery publication of the NB-IoT terminal
The occupied bandwidth of message is less than or equal to the bandwidth that 1 PRB pair is answered.
Optionally, the NB-IoT terminal it is corresponding it is direct give out information include: the distance terminal mark letter
The terminal type cell of breath and the distance terminal, the terminal type cell of the distance terminal are suitable to indicate that the distal end is whole
The terminal type at end.
Optionally, the direct discovery resource pool of the base station configuration is transmitted by following any mode: by setting in advance
The system information block of fixed extension transmits；Or, being transmitted by preset system information block relevant to narrowband terminal.
Optionally, the direct discovery resource pool is that eMTC terminal directly finds resource pool, and the eMTC terminal is directly sent out
Existing resource pool includes: that can transmit subframe, starting subframe position, frequency domain resource sum and starting frequency domain resource position.
Optionally, the eMTC terminal directly finds that the bandwidth of resource pool is less than or equal to the bandwidth of 6 Physical Resource Block.
Optionally, the direct discovery resource pool is that NB-IoT terminal directly finds resource pool, and NB-IoT terminal is directly sent out
Existing resource pool includes: that can transmit subframe, starting subframe position, frequency domain resource sum and starting frequency domain resource position.
Optionally, the NB-IoT terminal directly finds that the bandwidth of resource pool is less than or equal to the band of 1 Physical Resource Block
It is wide.
The embodiment of the invention also provides the selection systems that a kind of D2D directly has found resource, comprising: base station, link terminal
And distance terminal, in which: the base station is suitable for preconfigured straight to the distance terminal and link terminal broadcast
Sending and receiving show resource pool；The link terminal, suitable for receiving the direct discovery resource pool of the base station configuration, in the direct discovery
Discovery transfer resource is determined in resource pool, and on identified discovery transfer resource, Xiang Suoshu distance terminal, which is sent, directly to be sent out
Now give out information, the direct terminal type and identification information to give out information including the link terminal；It is described remote
Terminal is held, is connect suitable for receiving the direct discovery resource pool of the base station configuration, and in the resource of the direct discovery resource pool
Receive described direct give out information.
Optionally, the link terminal is believed suitable for receiving the first RRC signaling of the base station configuration from the first RRC
The dedicated discovery transfer resource that the link terminal of the base station configuration is obtained in order, transmits as identified discovery and provides
Source.
Optionally, the link terminal is suitable for directly finding in resource pool from described, randomly chooses part resource as institute
Determining discovery transfer resource.
Optionally, the distance terminal is believed suitable for receiving the second RRC signaling of the base station configuration from the 2nd RRC
The discovery that the base station configuration is obtained in order receives resource, and receives in accessed discovery and receive the direct hair in resource
Now give out information.
Optionally, the distance terminal is adapted for listening for the direct discovery resource pool, receives the direct discovery publication and disappears
Breath.
Optionally, when the distance terminal is NB-IoT terminal, the corresponding directly discovery publication of the NB-IoT terminal
The occupied bandwidth of message is less than or equal to the bandwidth that 1 PRB pair is answered.
Optionally, the NB-IoT terminal it is corresponding it is direct give out information include: the distance terminal mark letter
The terminal type cell of breath and the distance terminal, the terminal type cell of the distance terminal are suitable to indicate that the distal end is whole
The terminal type at end.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that
When distance terminal is narrowband terminal, base station configuration directly finds resource pool rather than directly finds resource pool collection
It closes, so as to avoid because direct discovery can not be listened to caused by directly finding the occupied broader bandwidth of resource pool set
The case where giving out information.Link terminal and distance terminal carry out the transmission directly to give out information on the same resource
And reception, therefore distance terminal can be informed in the reception for carrying out directly giving out information in which resource, therefore can be true
It protects narrowband terminal and carries out the normal direct discovery procedure of D2D.
When distance terminal is NB-IoT terminal, the corresponding direct occupied bandwidth that gives out information of NB-IoT terminal
Less than or equal to the bandwidth that 1 PRB pair is answered, the reception ability of NB-IoT terminal can satisfy, so as to ensure NB-IoT end
End is able to carry out the direct discovery procedure of normal D2D.
Detailed description of the invention
Fig. 1 is the flow chart for the selection method that one of embodiment of the present invention D2D directly has found resource；
Fig. 2 is that one of embodiment of the present invention base station is the schematic diagram that link terminal configures dedicated discovery transfer resource；
Fig. 3 is the flow chart for the selection method that another D2D in the embodiment of the present invention directly has found resource；
Fig. 4 is the structural schematic diagram for the selection system that another D2D in the embodiment of the present invention directly has found resource.
Specific embodiment
ProSe short distance business includes that ProSe directly has found and direct communication.In the prior art, D2D is directly had found
There are two kinds of resources distribution types: Type1 is broadcast-type, and the distribution of directly resource occupied by discovery signal is based on the dedicated side of non-UE
Formula is independently selected by terminal, suitable for the UE in the covering and UE outside covering；Type2 is tailored version, directly discovery signal institute
The distribution for occupying resource is based on UE dedicated mode, is distributed by base station, suitable for the UE in covering.
In existing direct discovery, there are two kinds of discovery transmission modes, and: ModeA uses independent discovery protocol message
For directly finding publication (Announcement), belong to broadcast-type；ModeB, using two discovery protocol messages for direct
It was found that request and directly discovery response (Solicitation and Response).
In the existing direct discovery procedure of D2D, the transmitting-receiving resource of the UE of base station configuration does not carry out stringent limitation.It is in
Discovery used in UE in base station range receives resource and is obtained by the system information of base station broadcast, covers in base station
It is preconfigured that the discovery of UE outside range, which receives resource,.UE receives required number by monitoring all reception resource pools
According to.
However, since the transmitting-receiving ability of the narrowband terminals such as eMTC UE or NB-IoT UE is limited in bandwidth, if base station
The total bandwidth of all reception resource pools of configuration is more than that narrow-band devices receive ability, then needed for narrowband terminal possibly can not receive
Data, cause narrowband terminal that can not be normally carried out the direct discovery procedure of D2D.
In embodiments of the present invention, when distance terminal be narrowband terminal when, base station configuration directly discovery resource pool rather than
Find resource pool set, directly so as to avoid because of nothing caused by directly finding the occupied broader bandwidth of resource pool set
Method listens to the case where directly giving out information.Link terminal is directly sent out on the same resource with distance terminal
The transmission and reception now to give out information, therefore distance terminal can be informed in what progress in which resource directly gave out information
It receives, therefore can ensure that narrowband terminal carries out the normal direct discovery procedure of D2D.
It is understandable to enable above-mentioned purpose of the invention, feature and beneficial effect to become apparent, with reference to the accompanying drawing to this
The specific embodiment of invention is described in detail.
Before the D2D provided in the embodiment of the present invention directly has found that the selection method of resource is described in detail, first
Two kinds specified in existing 3GPP agreement direct discovery modes are briefly described respectively.
In the direct discovery mode of ModeA, link terminal transmission directly gives out information.Distance terminal can receive more
Direct the giving out information of a link terminal transmission, according to multiple direct signal qualities to give out information, from multiple
After the link terminal for selecting a signal quality best in terminal.Later, distance terminal can with selected link terminal into
Row D2D direct communication.
In the direct discovery mode of ModeB, distance terminal sends to multiple relayings and directly finds request message.Multiple relayings
Terminal sends to distance terminal after receiving directly discovery request message and directly finds response message.Distance terminal is receiving
The direct discovery response message sent to multiple link terminals, according to multiple signal qualities for directly finding response messages, from more
The link terminal for selecting a signal quality best in a relaying.Later, distance terminal can with selected link terminal into
Row D2D direct communication.
The embodiment of the invention provides a kind of D2D directly to find that the selection method of resource is directed to the direct discovery mode of ModeA,
Referring to Fig.1, it is described in detail below by way of specific steps.
Step S101, distance terminal and link terminal receive the direct discovery resource pool of base station configuration respectively.
In specific implementation, the direct discovery resource pool that base station is configured can with the terminal type of distance terminal and in
Terminal type after terminal is related.When the cell locating for the distance terminal supports narrowband terminal communication or locating for link terminal
When cell supports narrowband terminal communication, base station can different system information block (System Information Block,
SIB be respectively configured in) the corresponding direct discovery resource pool of wide-band terminal, the corresponding direct discovery resource pool of eMTC terminal and
The corresponding direct discovery resource pool of NB-IoT terminal.It is directly finding in resource pool, including can be used for transmitting or receiving direct
It was found that the resource of message.
That is, base station can be directed on SIB set by narrowband terminal existing, namely believe in same system
On the different SIB of breath, the corresponding direct discovery resource pool of different terminals type is respectively configured, and broadcasted.
In embodiments of the present invention, base station can also redefine the SIB of an extension, and the SIB of the extension is current
The system information block not yet made in 3GPP agreement.For example, the SIB of extension is SIB21.It base station can be in the SIB21 newly defined
Upper broadcast eMTC terminal directly finds that resource pool, or broadcast NB-IoT terminal directly find resource pool.
Base station can be broadcast to all terminals after the configuration for completing directly to find resource pool by system information.In
The direct discovery resource pool of base station broadcast is received respectively after terminal and distance terminal, directly finds that the resource pool in resource pool is used for
Carrying link terminal and distance terminal carry out the data that sidelink link is directly found.Due to the system message of base station broadcast
In, it is understood that there may be following three kinds: i.e. the direct discovery resource pool of wide-band terminal, the direct discovery resource pool of eMTC terminal and
The direct discovery resource pool of NB-IoT terminal.Therefore, link terminal and distance terminal are in the system message for receiving base station broadcast
When, direct hair corresponding with the terminal type of itself can be obtained from system message respectively according to the terminal type of itself
Existing resource pool.
For example, distance terminal is eMTC terminal, link terminal is wide-band terminal, then distance terminal is obtained from system message
EMTC terminal directly finds that resource pool, link terminal obtain wide-band terminal from system message and directly find resource pool.
That is, in embodiments of the present invention, base station is the direct discovery resource pool of distance terminal configuration rather than matches
Directly discovery resource pool set is set, so as to avoid because the directly discovery occupied bandwidth of resource pool set is beyond distance terminal
Reception ability, and then can not be carried out to avoid distance terminal the direct discovery procedure of D2D scene occur.
In embodiments of the present invention, when narrowband terminal is eMTC terminal, the direct discovery resource pool of base station configuration is
EMTC terminal directly finds resource pool.
In practical applications, eMTC terminal directly find resource pool include: subframeBitmap,
OffsetIndicator, numPRB, start PRB or end PRB, in which: what subframeBitmap can be transmitted for determination
Subframe, offsetIndicator is for determining starting subframe position, and numPRB is for determining frequency domain resource sum, start PRB
Or end PRB is for determining the frequency domain resource position of starting.
That is, eMTC terminal, which directly finds to be configured in resource pool, can transmit subframe, starting subframe position, frequency domain money
Source sum and starting frequency domain resource position.
In embodiments of the present invention, since the bandwidth of eMTC terminal corresponds to 6 PRB, the eMTC terminal of base station configuration
Directly find that the bandwidth of resource pool is less than or equal to the bandwidth of 6 PRB.
When distance terminal is NB-IoT terminal, the direct discovery resource pool of base station configuration is that NB-IoT terminal is directly found
Resource pool.
In practical applications, NB-IoT terminal directly find resource pool include: subframeBitmap,
OffsetIndicator, numSubcarrier and start Subcarrier or end Subcarrier, in which:
SubframeBitmap is used for the subframe that determination can be transmitted, and offsetIndicator originates subframe position for determining,
NumSubcarrier is for determining frequency domain resource sum, and start Subcarrier or end Subcarrier are for determining
The frequency domain resource position of beginning.
That is, NB-IoT terminal, which directly finds to be configured in resource pool, can transmit subframe, starting subframe position, frequency domain
Total number resource and starting frequency domain resource position.
In embodiments of the present invention, since the bandwidth of NB-IoT terminal corresponds to 1 PRB, the NB-IoT of base station configuration
Terminal directly finds that the bandwidth of resource pool is less than or equal to the bandwidth of 1 PRB.
Step S102, the link terminal it is described directly find resource pool in determine discovery transfer resource, and really
On fixed discovery transfer resource, the transmission of Xiang Suoshu distance terminal directly gives out information.
In practical applications, for the direct discovery mode of ModeA, in direct discovery procedure, link terminal is sent straight
The type that sending and receiving show message is directly to give out information, and the received type for directly finding message of distance terminal is directly to find
It gives out information.It is directly finding to carry message indication information element in message, being used to indicate the direct discovery message is directly discovery
It gives out information, or directly discovery request message either directly finds response message.
Due in the embodiment of the present invention, just for the direct discovery mode of ModeA, therefore, the direct hair that link terminal is sent
Existing message is directly to give out information.In directly giving out information, the identification information of link terminal can be carried
And the terminal type cell of link terminal, terminal type cell are used to indicate the terminal type of link terminal.For example, terminal class
Type cell can serve to indicate that link terminal is eMTC terminal or NB-IoT terminal or wide-band terminal.Distance terminal is connecing
Receive link terminal transmission it is direct give out information after, can reading terminals type cell, to know the end of link terminal
Hold type.
In practical applications, the identification information of link terminal can be that the layer two that core-network side is link terminal configuration is marked
Knowledge namely layer-2ID.
In specific implementation, it is preconfigured to can be base station for discovery transfer resource determined by link terminal, can also be with
It is that link terminal independently selects.
In an embodiment of the present invention, base station configures the dedicated discovery transfer resource of link terminal in the first RRC signaling,
And the first RRC signaling is sent to link terminal.Link terminal therefrom obtains after the first RRC signaling for receiving base station configuration
The dedicated discovery transfer resource for taking base station to configure, as finding transfer resource determined by link terminal.Link terminal is in determination
It was found that on identified discovery transfer resource, directly giving out information to distance terminal transmission after transfer resource.Match base station
The discovery transfer resource set is the resource in the direct discovery resource pool of base station configuration.
Referring to Fig. 2, giving one of embodiment of the present invention base station is that link terminal configures dedicated discovery transfer resource
Schematic diagram, with time division multiplexing (Time Division Duplexing, TDD) be uplink/downlink (uplink/
Downlink, UL/DL) configuration mode 0 for.
In Fig. 2, abscissa is time-domain position, as unit of subframe；Ordinate is frequency domain position, as unit of PRB.TDD
The corresponding time-domain position of UL/DL configuration mode 0 be embodied in the part subframe in subframeBitmap be 2,3,4,7,8,
9, frequency domain position is embodied in the resource that 6 PRB pairs of numPRB, start PRB or end PRB between PRB3~PRB9 are answered,
Above-mentioned time-domain position and the corresponding resource of frequency domain position can be used for transmitting directly discovery message.In embodiments of the present invention, directly
It is directly to give out information that sending and receiving, which show message,.
There are three link terminals, are followed successively by link terminal 1, link terminal 2 and link terminal 3.Base station is respectively three
A link terminal configures the first RRC signaling.
Base station is the dedicated discovery resource of configuration are as follows: when time-domain position is in the first RRC signaling that link terminal 1 configures
Domain subframe 2, frequency domain position are the PRB that call number is 8 and 9；Time-domain position is suitable for subframe 7, and frequency domain position is that call number is 8 Hes
7 PRB.
Base station is the dedicated discovery resource of configuration are as follows: when time-domain position is in the first RRC signaling that link terminal 2 configures
Domain subframe 2, frequency domain position are the PRB that call number is 6 and 5；Time-domain position is subframe 3, and frequency domain position is that call number is 6 Hes
5 PRB；Time-domain position is subframe 8, and frequency domain position is the PRB that call number is 6 and 5.
Base station is the dedicated discovery resource of configuration are as follows: when time-domain position is in the first RRC signaling that link terminal 3 configures
Domain subframe 4, frequency domain position are the PRB that call number is 6 and 7；Time-domain position is subframe 9, and frequency domain position is that call number is 6 Hes
7 PRB.
As can be known from Fig. 2, base station is that respective dedicated discovery resource is respectively configured in 3 link terminals.Dedicated discovery resource
Refer to that being only some link terminal is used, and cannot be used by other link terminals.
It completes that 3 RRC signalings are sent respectively to 3 respectively with postponing to the RRC signaling of 3 link terminals in base station
A link terminal.3 link terminals are after receiving corresponding RRC signaling, you can learn that the dedicated discovery of itself is transmitted
Resource.
At this point, the direct discovery resource pool that base station is distance terminal configuration is answered are as follows: time-domain position be subframe 2,3,4,
7,8,9, frequency domain position is the PRB of call number 3~9.In this way, distance terminal can listen to what above-mentioned 3 link terminals were sent
Directly give out information.
In an alternative embodiment of the invention, link terminal is in the direct discovery resource pool that base station configures, random selection money
Source sends directly discovery hair to distance terminal as identified discovery transfer resource, and on identified discovery transfer resource
Cloth message.
With continued reference to Fig. 2, direct discovery resource pool that link terminal receives are as follows: time-domain position be subframe 2,3,4,
7,8,9, frequency domain position is the PRB of call number 3~9.Link terminal can be from the corresponding call number of subframe 2,3,4,7,8,9
For in 3~9 PRB, optional two PRB transmission directly gives out information.Distance terminal monitors above-mentioned resource pool and obtains relaying
What terminal was sent directly gives out information.
When the discovery transfer resource of link terminal is configured by base station, base station side can be distinguished for different link terminals
Different discovery transfer resources is configured, so as to avoid the feelings of the same discovery transfer resource of multiple link terminal simultaneous selections
Condition occurs.
Step S103, the distance terminal receive the direct discovery publication in the resource of the direct discovery resource pool
Message.
In specific implementation, distance terminal receives the used discovery that directly gives out information and receives resource, with relaying
It is identical resource that terminal, which sends the used discovery transfer resource directly to give out information,.
In embodiments of the present invention, discovery used in distance terminal receives resource to can be base station preconfigured,
It can be what base station independently selected.
In an embodiment of the present invention, base station configures discovery in the second RRC signaling and receives resource, and the 2nd RRC is believed
Order is sent to distance terminal.Distance terminal therefrom obtains discovery and receives money after the second RRC signaling for receiving base station configuration
Source receives resource as discovery used in distance terminal.Distance terminal receives in resource in the discovery that base station configures, in reception
After direct the giving out information of terminal transmission.The discovery of base station configuration receives the direct discovery resource pool that resource is base station broadcast
In resource.
In an alternative embodiment of the invention, distance terminal monitors the direct of base station configuration and transmits resource pool, receives relaying eventually
Direct the giving out information of end transmission.
In embodiments of the present invention, link terminal is sending the used directly discovery resource that directly gives out information
It is identical to receive directly discovery resource pool used in directly giving out information with distance terminal for pond.That is, passing through base station
The same direct discovery resource pool is configured for link terminal and distance terminal, distance terminal can know the direct hair that should be monitored
Existing resource pool so as to receive direct the giving out information of link terminal transmission, therefore can provide to avoid because of directly discovery
The case where directly giving out information can not be listened to caused by the occupied broader bandwidth in source pond.
Directly find that the signaling process of the selection method of resource is carried out to the D2D provided in the above embodiment of the present invention below
Illustrate, referring to Fig. 3.
Step S31, base station broadcast directly find resource pool.
Step S32, link terminal receive the direct discovery resource pool of base station configuration.
Step S33, distance terminal receive the direct discovery resource pool of base station configuration.
Step S34, link terminal determine discovery transfer resource.
Step S35, link terminal send directly discovery publication to distance terminal and disappear on determining discovery transfer resource
Breath.
Step S36, distance terminal are received in the directly resource of discovery resource pool and are directly given out information.
In the prior art, in the R12 version of 3GPP agreement and R13 version, directly discovery message occupies two companies
Continuous PRB is transmitted.For eMTC terminal, since the maximum transmission bandwidth that eMTC terminal is supported is 6 PRB,
EMTC terminal being capable of the existing direct discovery message of normal use.
However, for NB-IoT terminal, since the maximum transmission bandwidth that NB-IoT terminal is supported is 1 PRB, because
This, existing direct discovery message is unable to satisfy the demand of NB-IoT terminal.To solve the above problems, being mentioned in the embodiment of the present invention
A kind of the direct of NB-IoT terminal that be directed to newly defined has been supplied to give out information, what is newly defined is directed to the direct of NB-IoT terminal
It was found that the occupied bandwidth to give out information is less than or equal to the bandwidth that 1 PRB pair is answered.
Give out information newly defining for the direct of NB-IoT terminal, terminal type including distance terminal with
And the identification information of distance terminal.Newly define it is direct give out information in can also include other information, not do herein
It repeats.
Referring to Fig. 4, the embodiment of the invention provides the selection systems that a kind of D2D directly has found resource, comprising: base station 401,
Link terminal 402 and distance terminal 403, in which:
The base station 401, it is preconfigured straight suitable for being broadcasted to the distance terminal 403 and the link terminal 402
Sending and receiving show resource pool；
The link terminal 402, the direct discovery resource pool configured suitable for receiving the base station 401, in the direct hair
Discovery transfer resource is determined in existing resource pool, and on identified discovery transfer resource, Xiang Suoshu distance terminal 403 is sent directly
Sending and receiving now give out information, the direct terminal type and identification information to give out information including the link terminal；
The distance terminal 403, the direct discovery resource pool configured suitable for receiving the base station 401, and described direct
It was found that receiving described direct give out information in the resource of resource pool.
In specific implementation, the link terminal 402 may be adapted to receive the first RRC letter that the base station 401 configures
It enables, the dedicated discovery transfer resource for the link terminal that the base station 401 configures is obtained from first RRC signaling, make
For identified discovery transfer resource.
In specific implementation, the distance terminal 403 may be adapted to receive the 2nd RRC letter that the base station 401 configures
It enables, the discovery that the base station 401 configures is obtained from second RRC signaling and receives resource, and is connect in accessed discovery
It receives and receives described direct give out information in resource.
In specific implementation, the link terminal 402 may be adapted to from the direct discovery resource pool, random selection
Part resource is as identified discovery transfer resource.
In specific implementation, the distance terminal 403, may be adapted to monitor the direct discovery resource pool, described in reception
Directly give out information.
In specific implementation, when the distance terminal 403 be NB-IoT terminal when, it is described it is direct give out information shared by
Bandwidth is less than or equal to the bandwidth that 1 PRB pair is answered.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (15)
1. the selection method that a kind of D2D directly has found resource characterized by comprising
Distance terminal and link terminal receive the direct discovery resource pool of base station configuration respectively, and the distance terminal is that narrowband is whole
End；
The link terminal directly finds to determine discovery transfer resource in resource pool described, and transmits and provide in identified discovery
On source, the transmission of Xiang Suoshu distance terminal directly gives out information, described direct to give out information including the link terminal
Terminal type and identification information；
The distance terminal it is described it is direct discovery resource pool resource on receive it is described it is direct give out information, and it is described far
End terminal receives the direct used discovery that gives out information and receives resource, sends with the link terminal and directly finds
Discovery transfer resource used in giving out information is identical；
When the distance terminal is NB-IoT terminal, the NB-IoT terminal it is corresponding it is direct give out information it is occupied
Bandwidth is less than or equal to the bandwidth that 1 PRB pair is answered；When the direct discovery resource pool is that eMTC terminal directly finds resource pool
When, the eMTC terminal directly finds that the bandwidth of resource pool is less than or equal to the bandwidth of 6 Physical Resource Block；When the direct hair
When existing resource pool is that NB-IoT terminal directly finds resource pool, the NB-IoT terminal directly find the bandwidth of resource pool be less than or
Equal to the bandwidth of 1 Physical Resource Block.
2. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the link terminal is in institute
It states in directly discovery resource pool and determines discovery transfer resource, comprising:
The link terminal receives the first RRC signaling of the base station configuration, includes that the base station is matched in first RRC signaling
The dedicated discovery transfer resource for the link terminal set, the dedicated discovery transfer resource are in the directly discovery resource pool
Resource；
The link terminal reads first RRC signaling, therefrom obtains the dedicated discovery transmission money of the base station configuration
Source, as identified discovery transfer resource.
3. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the link terminal is in institute
It states in directly discovery resource pool and determines discovery transfer resource, comprising:
The link terminal directly finds in resource pool that random selection part resource is transmitted as identified discovery and provided from described
Source.
4. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the distance terminal is in institute
It states and receives described direct give out information in the directly resource of discovery resource pool, comprising: the distance terminal reception base
It stands the second RRC signaling of configuration, includes that the discovery of base station configuration receives resource in second RRC signaling；
The distance terminal reads second RRC signaling, therefrom obtains the discovery and receives resource, and in accessed hair
It now receives and receives described direct give out information in resource.
5. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the distance terminal is in institute
State and receive described direct give out information in the directly resource of discovery resource pool, comprising: the distance terminal monitor it is described directly
Sending and receiving show resource pool, receive described direct give out information.
6. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the NB-IoT terminal pair
Directly giving out information for answering includes: the identification information of the distance terminal and the terminal type letter of the distance terminal
Member, the terminal type cell of the distance terminal are suitable to indicate that the terminal type of the distance terminal.
7. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the base station configures straight
Sending and receiving show resource pool and are transmitted by following any mode:
It is transmitted by the system information block of preset extension；
Or, being transmitted by preset system information block relevant to narrowband terminal.
8. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the direct discovery resource
Pond is that eMTC terminal directly finds resource pool, and the eMTC terminal directly finds that resource pool includes: that can transmit subframe, starting subframe
Position, frequency domain resource sum and starting frequency domain resource position.
9. the selection method that D2D as described in claim 1 directly has found resource, which is characterized in that the direct discovery resource
Pond is that NB-IoT terminal directly finds resource pool, and NB-IoT terminal directly finds that resource pool includes: that can transmit subframe, starting subframe
Position, frequency domain resource sum and starting frequency domain resource position.
10. the selection system that a kind of D2D directly has found resource characterized by comprising base station, link terminal and distal end are eventually
End, in which:
The base station is suitable for broadcasting preconfigured direct discovery resource pool to the distance terminal and the link terminal；
The link terminal is directly found in resource pool suitable for receiving the direct discovery resource pool of the base station configuration described
Determine discovery transfer resource, and on identified discovery transfer resource, Xiang Suoshu distance terminal sends directly discovery publication and disappears
Breath, the direct terminal type and identification information to give out information including the link terminal；
The distance terminal, suitable for receiving the direct discovery resource pool of the base station configuration, and in the direct discovery resource pool
Resource on receive it is described it is direct give out information, and the distance terminal receives direct give out information and is used
Discovery receive resource, with the link terminal send directly give out information used in find transfer resource it is identical；
When the distance terminal is NB-IoT terminal, the NB-IoT terminal it is corresponding it is direct give out information it is occupied
Bandwidth is less than or equal to the bandwidth that 1 PRB pair is answered；When the direct discovery resource pool is that eMTC terminal directly finds resource pool
When, the eMTC terminal directly finds that the bandwidth of resource pool is less than or equal to the bandwidth of 6 Physical Resource Block；When the direct hair
When existing resource pool is that NB-IoT terminal directly finds resource pool, the NB-IoT terminal directly find the bandwidth of resource pool be less than or
Equal to the bandwidth of 1 Physical Resource Block.
11. the selection system that D2D as claimed in claim 10 directly has found resource, which is characterized in that the link terminal is fitted
In the first RRC signaling for receiving the base station configuration, the relaying of the base station configuration is obtained from first RRC signaling
The dedicated discovery transfer resource of terminal, as identified discovery transfer resource.
12. the selection system that D2D as claimed in claim 10 directly has found resource, which is characterized in that the link terminal is fitted
It is directly found in resource pool in from described, randomly chooses part resource as identified discovery transfer resource.
13. the selection system that D2D as claimed in claim 10 directly has found resource, which is characterized in that the distance terminal is fitted
In the second RRC signaling for receiving the base station configuration, the discovery that the base station configuration is obtained from second RRC signaling is received
Resource, and received in accessed discovery and receive described direct give out information in resource.
14. the selection system that D2D as claimed in claim 10 directly has found resource, which is characterized in that the distance terminal is fitted
In monitoring the direct discovery resource pool, described direct give out information is received.
15. the selection system that D2D as claimed in claim 10 directly has found resource, which is characterized in that the NB-IoT terminal
Corresponding direct give out information includes: the identification information of the distance terminal and the terminal type letter of the distance terminal
Member, the terminal type cell of the distance terminal are suitable to indicate that the terminal type of the distance terminal.
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| CN109217989B (en) * | 2017-06-30 | 2022-02-18 | 华为技术有限公司 | Data transmission method, access network equipment and terminal equipment |
| CN110945933B (en) * | 2017-08-09 | 2022-04-29 | 华为技术有限公司 | Resource allocation method, first device and second device |
| CN109391925A (en) | 2017-08-10 | 2019-02-26 | 索尼公司 | Electronic equipment and wireless communications method in wireless communication system |
| CN109548173B (en) * | 2017-08-11 | 2022-08-19 | 中兴通讯股份有限公司 | Device-to-device communication method and device |
| CN110830952B (en) * | 2018-08-10 | 2023-03-28 | 中兴通讯股份有限公司 | Resource allocation method and device for direct link in Internet of vehicles |
| CN111132224B (en) * | 2018-11-01 | 2021-12-14 | 维沃移动通信有限公司 | sidelink connection control method, terminal and network side equipment |
| WO2022205349A1 (en) * | 2021-04-01 | 2022-10-06 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device, and network device |
| WO2022227087A1 (en) * | 2021-04-30 | 2022-11-03 | Oppo广东移动通信有限公司 | Discovery message transmission method and apparatus, device, and storage medium |
| WO2023065340A1 (en) * | 2021-10-22 | 2023-04-27 | 北京小米移动软件有限公司 | Auxiliary information sending method and apparatus, auxiliary information receiving method and apparatus, and communication apparatus and storage medium |
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