CN110086582A - A kind of channel measuring method and system, the first communication node and the second communication node - Google Patents
A kind of channel measuring method and system, the first communication node and the second communication node Download PDFInfo
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- CN110086582A CN110086582A CN201810076322.2A CN201810076322A CN110086582A CN 110086582 A CN110086582 A CN 110086582A CN 201810076322 A CN201810076322 A CN 201810076322A CN 110086582 A CN110086582 A CN 110086582A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
Abstract
This application discloses a kind of channel measuring method and system, the first communication node and the second communication node, the channel measuring method includes: that the first communication node determines reference signal resource, sends reference signal on the reference signal resource；First communication node receives the channel measurement that the second communication node is obtained according to the reference signal.The application realizes the measurement of opposite side link channel, realizes the adaptive transmitting-receiving of data, improves the data transmission efficiency on SL.
Description
Technical field
This application involves wireless communication field, espespecially a kind of channel measuring method and system, the first communication node and second
Communication node.
Background technique
Close range communication techniques are received more and more attention such as device-to-device (D2D, Device-to-Device)
And research.Can be applied to public safety, car networking, floor manager, social networks, e-payment, local advertising, Entertainment,
Network coverage enhancing etc..
D2D technology, which can work, to be had the network coverage, subnetwork covering and without several scenes such as coverings, is allowing multiple
The user equipment (i.e. D2D user equipment (D2D UE, D2D User Equipment)) for holding D2D function directly found or
Direct communication.The application of D2D technology, the burden that can mitigate cellular network, improve data at the battery power consumption for reducing user equipment
Rate, and improve the robustness of network infrastructure, meet the requirement of high data rate traffic and adjacent service well, and
Also it supports the direct communication under wireless network covering scene, can satisfy the specific communications demand such as public safety, as shown in Figure 1,
UE1 and UE2 is by SL direct communication, and (such as evolved node B (eNB, Evolved Node B) can be UE1 and UE2 points for base station
Resource with SL communication.
In the uplink (UL, UpLink) of long term evolution (LTE, Long Term Evolution), UE hair is dispatched in base station
Serve the measurement estimation of capable detection reference signal (SRS, Sounding Reference Signal) Lai Jinhang up channel, SRS
Certain running time-frequency resource is occupied, as shown in Fig. 2, each square indicates a resource, also, the square table of Dark grey in figure
Show the resource that SRS is occupied, grayish square indicates the resource that SRS may be occupied, and base station obtains uplink according to the SRS received
The state of link, so that preferably scheduling UE sends data.Likewise, for the downlink (DL, DownLink) of LTE, base
It stands and channel state information reference signals (CSI-RS, Channel State is sent by period or aperiodic mode
Information), which also occupies certain running time-frequency resource, as shown in figure 3, each square indicates a money in figure
Source, also, the square of Dark grey indicates the resource that CSI-RS is occupied, grayish square indicates the money that CSI-RS may be occupied
Source, since the waveform of uplink and downlink is different, the running time-frequency resource distribution of uplink and downlink reference signal is not quite alike.UE according to configuration or
The instruction that person is pre-configured demodulates down channel measuring signal, and feeds back to base station, is supplied to base station and does data dispatch reference.?
In the D2D application scenarios of R14 (14 version), in order to spread over and energy conservation, propose through D2D UE and relay distal end UE
The data of (remote UE) transmit data by side chain road (SL, SideLink), for energy conservation and improve on SL
The transmission rate of data, similar Uu link, carried out on SL channel measurement just seem it is necessary to, and in following D2D or
Into the unicast scene of vehicle (V2V, Vehicle to Vehicle), the self-adapting data transmitting-receiving of link is also be unable to do without person's vehicle
The measurement of SL channel.However there has been no the measurements that effective ways realize SL channel at present.
Summary of the invention
This application provides a kind of channel measuring method and system, the first communication node and the second communication node, Neng Goushi
The measurement of existing SL channel improves the efficiency of transmission of the data on SL to realize the adaptive transmitting-receiving of data.
This application provides a kind of channel measuring methods, comprising:
First communication node determines reference signal resource, sends reference signal on the reference signal resource；
First communication node receives the channel measurement that the second communication node is obtained according to the reference signal.
Optionally, after first communication node determines reference signal resource, this method further include:
First communication node sends the first instruction information of the reference signal resource.
Optionally, the reference signal resource of different first communication nodes is different.
Optionally, first communication node determines that reference signal resource includes:
First communication node determines the reference signal resource in reference signal resource pond.
Optionally, the reference signal is sent resource pool and is determined using following any mode:
Determine that the reference signal in the resource pool of side chain road sends money according to the first configuration information of third communication node
Source pond；
The reference signal being pre-configured in the resource pool of side chain road sends resource pool；
Determine that the reference signal in the resource pool of side chain road is sent out according to the second indication information of second communication node
Send resource pool.
Optionally, the reference signal resource is determined using following any mode:
The reference signal resource is determined according to the second configuration information of third communication node；
The reference letter is determined according to the mapping relations that the reference signal sends resource pool and the reference signal resource
Number resource；
It is sent in resource pool in the reference signal and randomly chooses at least one resource as the reference signal resource；
The reference signal send resource pool at least partly resource on measure, according to measurement result select to
A few resource is as the reference signal resource；
The resource for determining the second communication node feedback is the reference signal resource；
Select at least one resource as the reference signal resource from the resource that second communication node is fed back.
Optionally, it includes at least one following information that the reference signal, which sends resource pool:
Time-domain resource, frequency domain resource, transmission bandwidth, transmission comb, duration, mapping mode, power, cyclic shift ginseng
Number, signal waveform accounting parameter.
Present applicant proposes a kind of channel measuring methods, comprising:
Second communication node determines reference signal resource, receives signal on the reference signal resource, and from received
The reference signal of the first communication node transmission is demodulated in signal；
Second communication node obtains channel measurement according to the reference signal, and the channel measurement is fed back to
First communication node.
Optionally, it is described receive signal on reference signal resource after, it is described that first is demodulated from received signal is logical
Before the reference signal for believing node transmission further include:
Signal reverts to a complete signal based on the received.
Optionally, second communication node determines that reference signal resource includes:
Second communication node determines that reference signal resource receives the reference signal resource in resource pool.
Optionally, the reference signal is received resource pool and is determined using following any mode:
Determine that the reference signal in the resource pool of side chain road receives money according to the third configuration information of third communication node
Source pond；
The reference signal being pre-configured in the resource pool of side chain road receives resource pool；
Indicate that information determines that the reference signal in the resource pool of side chain road receives money according to the third of the first communication node
Source pond.
Optionally, the reference signal resource is determined using following any mode:
The reference signal resource is determined according to the 4th configuration information of third communication node；
The reference signal resource is determined according to the first of first communication node the instruction information；
The reference letter is determined according to the mapping relations that the reference signal receives resource pool and the reference signal resource
Number resource；
It is measured in at least partly resource in the reference signal resource pond, according to measurement result selection at least one
A resource is as the reference signal resource.
Present applicant proposes a kind of first communication nodes, comprising:
First determining module, for determining reference signal resource；
First sending module, for sending reference signal on the reference signal resource；
First receiving module, the channel measurement obtained for receiving the second communication node according to the reference signal.
Present applicant proposes a kind of second communication nodes, comprising:
Second determining module, for determining reference signal resource；
Second receiving module is demodulated for receiving signal on the reference signal resource, and from received signal
The reference signal that first communication node is sent；
Second sending module, for obtaining channel measurement according to the reference signal, by the channel measurement
Feed back to the first communication node.
Present applicant proposes a kind of first communication node, including first processor and the first computer readable storage medium,
It is stored with the first instruction in first computer readable storage medium, when first instruction is executed by the first processor
Any of the above-described kind of channel measuring method of Shi Shixian.
Present applicant proposes a kind of second communication node, including second processor and second computer readable storage medium storing program for executing,
It is stored with the second instruction in the second computer readable storage medium storing program for executing, when second instruction is executed by the second processor
Any of the above-described kind of channel measuring method of Shi Shixian.
Present applicant proposes a kind of computer readable storage mediums, are stored thereon with computer program, the computer journey
The step of any of the above-described kind of the first communication node side channel measuring method is realized when sequence is executed by processor.
Present applicant proposes a kind of computer readable storage mediums, are stored thereon with computer program, the computer journey
The step of any of the above-described kind of the second communication node side channel measuring method is realized when sequence is executed by processor.
Present applicant proposes a kind of channel measurement systems, comprising: any of the above-described kind of the first communication node and any of the above-described kind
Second communication node.
Compared with the relevant technologies, the application includes: that the first communication node determines reference signal resource, in the reference signal
Reference signal is sent in resource；First communication node receives the channel measurement that the second communication node is obtained according to the reference signal
As a result.The application determines reference signal resource by reference to signal resource pond, and reference signal is sent on reference signal resource,
To realize the measurement to SL channel, the adaptive transmitting-receiving of data is realized, the data transmission efficiency on SL is improved.
In one alternate embodiment, the reference signal resource of different first communication nodes is different, so that carrying out channel
The first different communication nodes sends reference signal using different reference signal resource when measurement, avoid signal collision and
Interference, accuracy and feasibility when improving multiple communication nodes while carrying out channel measurement.
In one alternate embodiment, reference signal resource is the resource in reference signal transmission resource pool, so that referring to
It can be indicated using less information content when showing or configuring reference signal resource, reduce the expense of instruction or configuration.
Other features and advantage will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood and implementing the application.The purpose of the application and other advantages can be by specifications, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical scheme, and constitutes part of specification, with this
The embodiment of application is used to explain the technical solution of the application together, does not constitute the limitation to technical scheme.
Fig. 1 is the relevant technologies D2D communication system schematic diagram；
Fig. 2 is the schematic diagram for the resource that the relevant technologies LTE uplink SRS occupies；
Fig. 3 is the schematic diagram for the resource that the offline CSI-RS of the relevant technologies LTE is occupied；
Fig. 4 is the flow chart of the application first embodiment channel measuring method；
Fig. 5 (a) is transmission schematic diagram when the application RS occupies the 1/2 of current sign duration；
Fig. 5 (b) is transmission schematic diagram when the application RS occupies the 1/3 of current sign duration；
Fig. 6 (a) is the application covering scene schematic diagram；
Fig. 6 (b) is the application half mulching schematic diagram of a scenario；
Fig. 6 (c) is the application without covering scene schematic diagram；
Fig. 7 is the mapping relations schematic diagram of the application RS resource pool and RS resource；
Fig. 8 is the schematic diagram of the application RS resource pool；
Fig. 9 (a) is 1/2 schematic diagram that the application RS occupies last symbol；
Fig. 9 (b) is the schematic diagram of the application RS frequency domain resource；
Figure 10 is the flow chart of the application second embodiment channel measuring method；
Figure 11 is that the application signal restores schematic diagram；
Figure 12 is the structure composition schematic diagram of the first communication node of the application；
Figure 13 is the structure composition schematic diagram of the second communication node of the application；
Figure 14 is the structure composition schematic diagram of another first communication node of the application；
Figure 15 is the structure composition schematic diagram of another second communication node of the application；
Figure 16 is the structure composition schematic diagram of the application channel measurement system.
Specific embodiment
For the purposes, technical schemes and advantages of the application are more clearly understood, below in conjunction with attached drawing to the application
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
In SL communication system, the transmission of information is carried out between UE using SL resource, according to specific application scenarios and industry
Service type etc., SL communication mode include D2D communication, V2V communication etc..
When UE is when SL carries out the interaction of information, transmitting terminal UE is in physics side link control channel (PSCCH, Physical
Sidelink Control Channel) SL is sent in resource controls information (SCI, Sidelink Control
Information), SCI is used to indicate physics side link shared channels used in transmitted SL data to receiving end UE
(PSSCH, Physical Sidelink Shared Channel) resource and relevant control information, such as modulating-coding side
Formula (MCS, Modulation and Coding Scheme), power control instruction, data retransmission instruction etc..Further, it sends out
Sending end UE sends SL data in the PSSCH resource indicated by SCI.
In SL communication, network side is that UE configures SL resource pool, or is pre-configured SL resource pool, which includes
PSCCH resource pool and PSSCH resource pool, UE use the resource SL information (including SL SCI or SL data) in SL resource pool.
Wherein, PSCCH resource pool refers to one group of resource for carrying SCI, passes through physical layer or high-rise letter by network side
Configuration is enabled, or is pre-configured.PSCCH resource pool includes one or more time-domain resource units, time-domain resource unit in the time domain
Including following any one: subframe (Subframe), time slot (Slot), symbol (Symbol) etc.；PSCCH resource pool is on frequency domain
Comprising one or more resource blocks (RB, Resource Block), the multiple RB for being included can be continuously or discontinuously.
Wherein, PSSCH resource pool refers to a kind of resource for carrying SL data, passes through physical layer or high level by network side
Signal deployment, or be pre-configured.PSSCH resource pool includes one or more time-domain resource units, time-domain resource unit in the time domain
Including following any one: subframe, time slot, symbol etc..PSSCH resource pool includes one or more RB on frequency domain, is included
Multiple RB can be continuously or discontinuously.
In the SL communication of the relevant technologies, UE sends SCI using PSCCH resource, sends SL data using PSSCH resource
When, transmitted information must use discrete Fourier transform spread-spectrum orthogonal frequency division multiplexing in PSCCH resource or PSSCH resource
Multiple access technique (DFT-S-OFDM, Discrete Fourier Transform Spread Orthogonal
Frequency Division Multiplexing) mode, also referred to as single-carrier frequency division multiple access access (SC-FDMA, Single
Carrier-Frequency Division Multiple Access) mode.Correspondingly, carrying out the received UE prison of signal in SL
The resource in SL resource pool is listened, and receives processing signal by the way of receiving DFT-S-OFDM signal, as shown in Figure 1, UE exists
Blind Detecting receives SCI in PSCCH resource pool, after detecting SCI, is further received in PSSCH resource according to the instruction of SCI
Data.However, in the SL communication of the relevant technologies, there has been no the measurements that effective ways realize SL channel.
Referring to fig. 4, the application first embodiment proposes a kind of channel measuring method, comprising:
Step 400, the first communication node determine reference signal resource, send on the reference signal resource with reference to letter
Number.
In the application, the first communication node can determine the reference signal resource in SL resource pool, or determine that RS is sent
Reference signal resource in resource pool.That is, the first communication node can according to configuration or with configuration or instruction mode
Selected section resource sends the part resource in resource pool as ginseng as reference signal resource, or from RS from SL resource pool
Examine signal resource.
When the first communication node determines that RS sends the reference signal resource in resource pool, so that indicating or configuring reference
It can be indicated using less information content when signal resource, reduce the expense of instruction or configuration.
When the first communication node determines that RS sends the reference signal resource in resource pool, the first communication node can first really
Determine RS and send resource pool, then is sent from RS and determine reference signal resource in resource pool.What needs to be explained here is that the first communication section
Point all first determines that RS sends resource pool before not needing to determine reference signal resource each time, and only needs to determine in first time
It first determines that RS sends resource pool before reference signal resource, does not need to determine RS since determining reference signal resource second
Send resource pool；Or after determining that RS sends resource pool, resource pool is sent for RS and assigns validity period, when expiring validity period,
It redefines RS and sends resource pool.
In the application, it includes following any that RS, which sends resource pool or the mode of RS reception resource pool:
RS is SRS type, and RS occupies other symbols of non-last symbol in subframe；
RS is SRS type, and RS occupies last symbol in subframe；
RS is CSI-RS type, and RS occupies other symbols of non-last symbol in subframe；
RS is CSI-RS type, and RS occupies last symbol in subframe.
RS sends resource pool or RS receives resource pool and uses different modes sending and receiving the different RS of correspondence
Journey communicates one end to end, and it is determining, RS transmission resource pool that RS, which sends resource pool or the mode of RS reception resource pool,
Or the mode of RS reception resource pool can specifically be determined using configuration or by the way of being pre-configured.
In the application, it includes at least one following information that reference signal, which sends resource pool or RS reception resource pool:
Time-domain resource, frequency domain resource, transmission bandwidth, transmission comb, duration, mapping mode, power, cyclic shift ginseng
Number, signal waveform accounting parameter.
Wherein, time-domain resource can indicate that time-domain resource can be in SL frame using the corresponding position of time-domain resource
At least one subframe or whole subframes, and RS can only take up at least one symbol in subframe, it can only use subframe
On partial symbols send RS.
Wherein, frequency domain resource can indicate that frequency domain resource can be SL resource pool using the corresponding position of frequency domain resource
Interior full bandwidth or at least one subband.
If indicating the time-frequency domain resources unit or time-frequency domain resources that a RS needs using a binary group (a, b)
Group, wherein a indicates the number of the time-domain resource unit that a RS is occupied or time-domain resource group, which can be
One symbol or multiple symbols, b indicate the frequency resource element number that RS is occupied, which can be a resource
Element (RE, Resource Element), then, time-domain resource and frequency domain resource in RS resource pool can be by several binary
Group (a, b) indicates.
The corresponding position of above-mentioned time-domain resource can specifically be indicated using following any mode.Wherein, a time domain
The corresponding position of resource is corresponding with a time-domain resource unit.For example, position 1 indicates that time-domain resource unit 1 arrives time domain resource unit
A time-domain resource unit between a.
The first, the corresponding position of time-domain resource is indicated using predefined mode.For example, different SL resource pools pair
The RS resource pool answered is different, it is possible to which the collection for being pre-configured with the last symbol of all subframes in SL resource pool is combined into RS
Resource pool, that is to say, that the corresponding position of time-domain resource can be indicated using SL resource pool.
Second, the corresponding position of time-domain resource is indicated by the way of mapped bits information, for example, using bit diagram
Be mapped in the subframe of SL resource pool, can indicate a subframe with a bit, i.e., allow RS to send when bit is 1, when than
RS is not allowed to send specially for when 0, that is to say, that when bit is 1, RS resource pool includes the corresponding subframe of the bit, works as bit
When being 0, RS resource pool does not include the corresponding subframe of bit.
The third, the corresponding position of time-domain resource is indicated using resource period and offset.Assuming that resource period is N1,
Offset is M1, and M1 is the integer less than N1, indicates to deviate M1 since resource initial position in resource period or final position
The corresponding position of a resource.For example, work as N1=5, when M1=3, preceding 3 resource packets in SL resource pool every 5 resources are indicated
It is contained in RS resource pool.
The corresponding position of above-mentioned frequency domain resource can specifically be indicated using following any mode.Wherein, a frequency domain
The corresponding position of resource is corresponding with b time-domain resource unit.For example, position 1 indicates that frequency resource element 1 arrives frequency resource element
B frequency resource element between b.
The first, the corresponding position of frequency domain resource is indicated using predefined mode.For example, on the frequency domain of SL resource pool
One shared N2 RE, a RS need to occupy b RE, then, it can be transmitted on frequency domainA RS, that is, have on frequency domainIn this case the corresponding position of a frequency domain resource can be pre-configured in SL resource pool 1, ownA resource
The corresponding position of resource can transmit RS, be pre-configured in SL resource pool 2, and the corresponding position of all even number frequency domain resources can
To transmit RS.Wherein, the corresponding position of a frequency domain resource includes b RE, that is to say, that can be indicated using SL resource pool
The corresponding position of frequency domain resource.
Second, the corresponding position of frequency domain resource is indicated by the way of mapped bits information, for example, SL resource pool
A shared N2 RE on frequency domain, a RS need to occupy b RE, then, it can be transmitted on frequency domainA RS, it is such
Words, can useA bit indicatesA resource unit group indicates that the resource unit group permits when bit is 1
Perhaps RS is sent, and indicates that the resource unit group does not allow RS to send when bit is 0.Wherein, a resource unit group includes b
RE。
Wherein, mapping mode refers to that mapping position of the RS in a RB, the mapping position can be pectination, be similar to
Mapping position of the LTE uplink SRS in RB is also possible to the same similar to mapping position of the LTE downlink CSI-RS in RB
Structure, mapping mode of the specific RS in RB can be corresponded with waveform is sent.
Wherein, transmission bandwidth refers to the width of the frequency domain resource of transmission of reference signals, i.e., continuous resource block (RB,
Resource Block) number.
Wherein, corresponding comb, different combs are corresponding when transmission comb refers to using similar to SRS the same full bandwidth reference signal
The frequency domain position of different reference signals.
Wherein, the duration refers to the number that reference signal is sent in the time domain.
Wherein, power refers to the transmission power of RS, and following at least one can be used to indicate: the transmission power of RS is UE
It is maximum send power, power grade, RS power ratio PSSCH high preset decibel etc..
Wherein, the basic sequence of reference signal refers to that multiplication obtains different orthogonal references and believes from different cyclic shift parameters
Number sequence, different cyclic shift parameters guarantee that RS of the different UE multiplexings in same time domain resource is orthogonal.
Wherein, signal waveform accounting parameter refer to RS occupy subframe a symbol before k/n time-domain resource come when transmitting
K value and n value.Wherein, RS occupies a symbol for subframe (such as last symbol may be used as time interval (GAP))
The time-domain resource of preceding k/n refers to that a complete RS is to repeat n times with the signal of the 1/n of current sign duration to obtain to transmit
Signal, and RS has only taken up the k/n of current sign in the time domain when actually sending, and this when a length of k/n RS be with current
The signal of the 1/n of symbol duration repeats k obtained signal, and the repeating signal in time domain is equivalent to insert at equal intervals on frequency domain
(n-1) a 0 RS sequence, as shown in Fig. 5 (a) and Fig. 5 (b).In Fig. 5 (a), n=2, k=1, then, a complete RS wave
The signal that shape is repeated 2 times with 1/2 signal of current sign duration, if RS only takes up current sign when practical transmission
1/2, then the first half signal of complete RS waveform is only sent when practical transmission, is equivalent to one resource in interval on frequency domain and is accounted for
With.In Fig. 5 (b), n=3, k=1, then, a complete RS waveform is repeated 3 times with 1/3 signal of current sign duration
The signal arrived, if RS only takes up the 1/3 of current sign when practical transmission, reality only sends complete RS waveform when sending
Preceding one third signal is equivalent to be spaced two resource occupation on frequency domain.
In the application, reference signal is sent resource pool and can be determined using following any mode.
The first, determine that according to the first configuration information of third communication node, the reference signal in SL resource pool sends resource
Pond.
Wireless heterogeneous networks (RRC, the Radio that first configuration information can be sent by third communication node (such as base station)
Resource Control) signaling or physical layer signaling (such as media access control (MAC, Media Access Control) layer
Control element (CE, Control Element) instruction) it carries.
First configuration information may include at least one following information:
Time-domain resource, frequency domain resource, transmission bandwidth, transmission comb, duration, mapping mode, power, cyclic shift ginseng
Number, signal waveform accounting parameter.
The mode that this determining RS sends resource pool can be applied in coverage area or under half mulching scene.For example, such as
Shown in Fig. 6 (a), in the coverage area of eNB1, eNB1 can be that UE1 and UE2 configures RS hair by RRC signaling by UE1 and UE2
Send resource pool.
For another example, as shown in Fig. 6 (b), UE1 in the coverage area of eNB2, UE2 not in the coverage area of eNB2, then
ENB2 can configure RS by RRC signaling and send resource pool, and then UE1 is notified by PSSCH or MAC CE signaling or RRC signaling
UE2RS receives resource pool.
Second, the reference signal being pre-configured in SL resource pool sends resource pool.For example, different SL resource pools is corresponding
RS to send resource pool different, for example, the collection that can be pre-configured with the last symbol of all subframes in SL resource pool is combined into
RS sends resource pool.For another example, a shared N2 RE on the frequency domain of SL resource pool, a RS need to occupy b RE, then, frequency domain
On can transmitA RS, that is, have on frequency domainThe corresponding position of a frequency domain resource in this case can be pre-
It first configures in SL resource pool 1, ownsThe corresponding position of a resource allocation can transmit RS, be pre-configured with SL resource pool
In 2, the corresponding position of all even number frequency domain resources can transmit RS.Wherein, the corresponding position of a frequency domain resource includes b
RE。
The mode that this determining RS sends resource pool can be applied under no covering scene.For example, as shown in Fig. 6 (c),
UE1 and UE2 is not in the coverage area of eNB3, and the RS of UE1 and UE2 send resource pool and RS reception resource pool can be preparatory
Configuration；It is pre-configured with alternatively, the RS of UE1 sends resource pool, then, UE1 is logical by PSSCH or MAC CE signaling or RRC signaling
Know that UE2RS receives resource pool.
The third, determine that according to the second indication information of second communication node, the reference signal in SL resource pool is sent
Resource pool.
Second indication information can be carried by PSSCH and/or MAC CE signaling or RRC signaling.This determining RS hair
Send the mode of resource pool that can apply under half mulching or without covering scene.
For example, as shown in Fig. 6 (b), UE1 in the coverage area of eNB2, UE2 not in the coverage area of eNB2, then
The RS that eNB2 can configure UE1 by RRC signaling sends resource pool, and then UE1 is signaled by PSSCH or MAC CE
UE2RS receives resource pool.
For another example, as shown in Fig. 6 (c), not in the coverage area of eNB3, it is pre- that the RS of UE1 sends resource pool by UE1 and UE2
It first configures, then, UE1 signals UE2RS by PSSCH or MAC CE and receives resource pool.
In the application, the reference signal resource of different first communication nodes is different, so that different when carrying out channel measurement
The first communication node reference signal is sent using different reference signal resource, avoid the collision and interference of signal, improve
Multiple communication nodes carry out the accuracy and feasibility when channel measurement simultaneously.
The reference signal resource difference of above-mentioned different first communication nodes refers to the reference signal of different first communication nodes
At least one in time-domain resource, frequency domain resource and code domain resource (such as cyclic shift parameter) is different.For example, difference first is logical
Believe that the time-domain resource of node is identical with frequency domain resource, and code domain resource is different；Alternatively, the time domain money of different first communication nodes
Source, frequency domain resource and code domain resource are all different；Other the case where and so on, which is not described herein again.
In the application, determine that reference signal resource is that the corresponding position of time-domain resource of determining RS and frequency domain resource correspond to
Position.Reference signal resource can be determined using following any mode.
The first, determines reference signal resource according to the second configuration information of third communication node.
Second configuration information may include the corresponding position of time-domain resource and the corresponding position of frequency domain resource.
Second, RS resource is determined according to the mapping relations that RS sends resource pool and RS resource.Assuming that there is N3 RS to send
Resource pool and M2 kind RS resource are sent on resource pool then RS resource in this M2 can be corresponded to N3 RS, it is ensured that each
RS sends resource pool and can uniquely correspond in a kind of RS resource.RS has been determined in the first communication node and the second communication node
After sending resource pool and RS reception resource pool, also determine that RS sends the RS resource in resource pool or RS reception resource pool.Such as
Shown in Fig. 7, it is assumed that the first communication node and the second communication node are configured with four RS resource pools, respectively RS resource pool 1, RS
Resource pool 2, RS resource pool 3 and RS resource pool 4, also, the first communication node and the second communication node determine and use RS resource pool 1
RS is sent, then RS resource also determines that, the first communication node sends RS, the second communication in the RS resource of RS resource pool 1
Node introduces RS signal in the RS resource of RS resource pool 1.
The third, the reference signal send resource pool in randomly choose at least one resource as the reference signal
Resource.As shown in figure 8, RS, which is sent in resource pool, is configured with 10 subframes and 40 frequency resource elements, selected from 10 subframes
The time-domain resource of subframe 2, subframe 5, subframe 8 and subframe 10 as RS resource is selected, two are selected from 40 frequency resource elements
Frequency domain resource of the frequency resource element as RS resource.
4th kind, the reference signal send resource pool at least partly resource on measure (sensing), root
Select at least one resource as the reference signal resource according to measurement result.
Specifically, firstly, calculating Reference Signal Received Power (RSRP, the Reference in the resource that a RS is occupied
Signal Receiving Power), if RSRP is greater than pre-determined threshold, then it represents that the resource is occupied, it is impossible to be used in send
RS；If RSRP is less than or equal to pre-determined threshold, then it represents that the resource is unoccupied, can be used for sending RS.
Then, at least one resource is selected to provide from the resource that RSRP is less than or equal to pre-determined threshold as reference signal
Source can choose the resource that part or all of RSRP is less than or equal to pre-determined threshold, or the selection the smallest resource of RSRP, etc.
Deng.
For example, it is assumed that configuration or the period for being pre-configured RS resource in RS transmission resource pool are N4, then, the first communication node
Sensing is carried out on the RS resource pool that the period is N4, calculates the resource granularity according to a determining resource granularity (x, y)
On RSRP, x be RS occupy time-domain resource number of unit, y be RS occupy frequency resource element number, the frequency domain resource list
Member can be the subband of RE or one group of RE composition；If the RSRP on the resource granularity (x, y) is greater than pre-determined threshold, table
Show that the resource granularity is occupied, it is impossible to be used in send RS；If the RSRP on the resource granularity is less than or equal to pre-determined threshold,
It indicates that the resource granularity is unoccupied, can be used for sending RS.
5th kind, determine that the resource of second communication node feedback is the reference signal resource.
In this method, the resource of the second communication node feedback refers to that the second communication node receives in resource pool extremely in RS
Sensing is carried out in small part resource, the resource fed back according to sensing result.
Specifically, firstly, the second communication node is under the triggering of the first communication node or the second communication node actively touches
Hair calculates the RSRP in the resource that a RS is occupied, if RSRP is greater than pre-determined threshold, then it represents that the resource is occupied, Bu Nengyong
In transmission RS；If RSRP is less than or equal to pre-determined threshold, then it represents that the resource is unoccupied, can be used for sending RS.
Then, the second communication node selects at least one resource to feed back from the resource that RSRP is less than or equal to pre-determined threshold
To the first communication node, the resource that part or all of RSRP is less than or equal to pre-determined threshold can choose, or selection RSRP is most
Small resource, etc..
For example, it is assumed that configuration or the period for being pre-configured RS resource in RS resource pool are N4, then, the second communication node is in week
The RS that phase is N4 is received and is carried out sensing on resource pool, calculates the resource granularity according to a determining resource granularity (x, y)
On RSRP, x be RS occupy time-domain resource number of unit, y be RS occupy frequency resource element number, the frequency domain resource list
Member can be the subband of RE or one group of RE composition；If the RSRP on the resource granularity (x, y) is greater than pre-determined threshold, table
Show that the resource granularity is occupied, it is impossible to be used in send RS；If the RSRP on the resource granularity is less than or equal to pre-determined threshold,
It indicates that the resource granularity is unoccupied, can be used for sending RS.
6th kind, from second communication node feed back resource in select at least one resource as the reference signal
Resource.
In this method, the resource of the second communication node feedback refers to that the second communication node receives in resource pool extremely in RS
Sensing is carried out in small part resource, the resource fed back according to sensing result.
Specifically, firstly, the second communication node is under the triggering of the first communication node or the second communication node actively touches
Hair calculates the RSRP in the resource that a RS is occupied, if RSRP is greater than pre-determined threshold, then it represents that the resource is occupied, Bu Nengyong
In transmission RS；If RSRP is less than or equal to pre-determined threshold, then it represents that the resource is unoccupied, can be used for sending RS.
Then, the second communication node selects at least one resource to feed back from the resource that RSRP is less than or equal to pre-determined threshold
To the first communication node, the resource that part or all of RSRP is less than or equal to pre-determined threshold can choose, or selection RSRP is most
Small resource, etc..
Finally, the first communication node selects at least one resource to provide as RS from the resource that the second communication node is fed back
Source.
In the application, RS is a RS sequence on frequency domain.Transmitting terminal mark can be added in the reference signal of transmission,
I.e. using the first communication node mark scrambling RS sequence, RS sequence is then sent in RS resource.Make the second communication section in this way
Point knows the transmitting terminal of the RS.
If RS sequence is sent in the last symbol of subframe, the RS actually sent only takes up this in the time domain
The k/n of symbol, the remaining time-domain resource on the symbol give over to time interval (GAP).For example, if RS Resource Pool Pattern is that RS is
SRS type, and RS occupies last symbol in subframe, is brought on frequency domain using the 2nd son and sends RS, such as Fig. 9 (a) and Fig. 9
(b) shown in, as k/n=1/2, the time-domain signal for being equivalent to RS is the signal being repeated twice in last symbol,
Frequency-region signal is that a frequency resource element is spaced in the 2nd subband to map RS, when sending RS, only sends the previous of RS
Half symbol, later half symbol still give over to GAP use.
Step 401, the first communication node receive the channel measurement knot that the second communication node is obtained according to the reference signal
Fruit.
In the application, after the first communication node receives channel measurement, using channel measurement as transmission signal
When channel quality reference frame improve the transmission rate of the data on SL to realize the adaptive transmitting-receiving of data.
Optionally, after the first communication node determines reference signal resource according to reference signal resource pond, this method further include:
First communication node sends the first instruction information of reference signal resource.
In the application, when in step 401 first communication node using the first or second the third or the 4th
Kind or the 6th kind of mode are come when determining RS resource, the first communication node needs to send the first of RS resource to the second communication node
Information is indicated, to indicate that the second communication node carries out signal demodulation.The first instruction information can be to be sent before sending RS,
It can be sent together with RS.
In the application, the first instruction information can be indicated using following any method.
The first, indicated using RS resource pool information.Assuming that having N3 RS resource pool and M2 kind RS resource, then can
RS resource in this M2 to be corresponded on N3 RS resource pool, it is ensured that each RS resource pool can uniquely correspond to a kind of RS
In resource.After the first communication node and the second communication node have determined identical RS resource pool, RS resource pool has also been determined that
In RS resource.In this case RS resource pool information can be directly used to indicate RS resource.
Second, RS resource is directlyed adopt to be indicated.
Specifically, for example, being compiled after transmitting-receiving both ends have determined RS resource pool to the RS resource in RS resource pool
Code, it is assumed that a then shared M3 kind RS resource is led to then the information of N5 bit can be used uniquely to indicate this M3 kind RS resource
SCI is crossed to be indicated.For example, the time-domain resource of RS resource pool is the last of each subframe in SL resource pool as shown in Fig. 9 (a)
One symbol is occupied using maximum transmission power and is divided into 4 sons in the frequency domain resource of 1/2, the RS resource pool of last symbol
Band, respectively subband 1, subband 2, subband 3 and subband 4, it is assumed that one shares 4 kinds of RS resources, the corresponding son of each RS resource
Band position, then can indicate the first instruction information on SCI.
Referring to Figure 10, the application second embodiment proposes a kind of channel measuring method, comprising:
Step 1000, the second communication node determine reference signal resource, and signal is received on the reference signal resource, and
The reference signal of the first communication node transmission is demodulated from received signal.
In the application, the second communication node can determine the reference signal resource in SL resource pool, or determine that RS is received
Reference signal resource in resource pool.That is, the second communication node can according to configuration or with configuration or instruction mode
Selected section resource receives the part resource in resource pool as ginseng as reference signal resource, or from RS from SL resource pool
Examine signal resource.
When the second communication node determines that RS receives the reference signal resource in resource pool, so that indicating or configuring reference
It can be indicated using less information content when signal resource, reduce the expense of instruction or configuration.
When the second communication node determines that RS receives the reference signal resource in resource pool, the second communication node can first really
Determine RS and receive resource pool, then is received from RS and determine reference signal resource in resource pool.What needs to be explained here is that the second communication section
Point all first determines that RS receives resource pool before not needing to determine reference signal resource each time, and only needs to determine in first time
It first determines that RS receives resource pool before reference signal resource, does not need to determine RS since determining reference signal resource second
Receive resource pool；Or after determining that RS receives resource pool, resource pool is received for RS and assigns validity period, when expiring validity period,
It redefines RS and receives resource pool.
In the application, RS reception resource pool is identical as RS transmission resource pool or RS reception resource pool includes that RS sends money
Source pond, i.e. RS are received the RS resource in resource pool in addition to including the RS resource in RS transmission resource pool, further include other resources.
In the application, reference signal is received resource pool and can be determined using following any mode:
The first, determine that according to the third configuration information of third communication node, the reference signal in SL resource pool receives resource
Pond.
Third configuration information may include at least one following information:
Time-domain resource, frequency domain resource, transmission bandwidth, transmission comb, duration, mapping mode, power, cyclic shift ginseng
Number, signal waveform accounting parameter.
The mode that this determining RS receives resource pool can be applied in coverage area or under half mulching scene.For example, such as
Shown in Fig. 6 (a), in the coverage area of eNB1, eNB1 can be that UE1 and UE2 configuration RS connects by RRC signaling by UE1 and UE2
Receive resource pool.
For another example, as shown in Fig. 6 (b), UE1 in the coverage area of eNB2, UE2 not in the coverage area of eNB2, then
ENB2 can configure RS by RRC signaling and send resource pool, and then UE1 is notified by PSSCH or MAC CE signaling or RRC signaling
UE2RS receives resource pool.
Second, the reference signal being pre-configured in SL resource pool receives resource pool.
The mode that this determining RS receives resource pool can be applied under no covering scene.For example, as shown in Fig. 6 (c),
UE1 and UE2 is not in the coverage area of eNB3, and the RS of UE1 and UE2 send resource pool and RS reception resource pool can be preparatory
Configuration；It is pre-configured with alternatively, the RS of UE1 sends resource pool, then, UE1 is logical by PSSCH or MAC CE signaling or RRC signaling
Know that UE2RS receives resource pool.
The third, according to the third of the first communication node indicate information determine the reference signal in SL resource pool receive resource
Pond.
The mode that this determining RS receives resource pool can be applied under half mulching or without covering scene.
For example, as shown in Fig. 6 (b), UE1 in the coverage area of eNB2, UE2 not in the coverage area of eNB2, then
The RS that eNB2 can configure UE1 by RRC signaling sends resource pool, and then UE1 is signaled by PSSCH or MAC CE
UE2RS receives resource pool.
For another example, as shown in Fig. 6 (c), not in the coverage area of eNB3, it is pre- that the RS of UE1 sends resource pool by UE1 and UE2
It first configures, then, UE1 signals UE2RS by PSSCH or MAC CE and receives resource pool.
In the application, reference signal resource can be determined using following any mode.
The first, determines reference signal resource according to the 4th configuration information of third communication node.
Second, the reference signal resource is determined according to the first of first communication node the instruction information.
The third, received according to the reference signal resource pool and the reference signal resource mapping relations determine described in
Reference signal resource.
4th kind, measure in at least partly resource in the reference signal resource pond, selected according to measurement result
At least one resource is selected as the reference signal resource.In this case it needs the RS resource of selection feeding back to the first communication
Node.
The specific implementation of the above method can refer to first embodiment, and which is not described herein again.
In the application, when RS only takes up a part of symbol in the time domain, according to a part of extensive of the symbol received
Again at a complete symbol, re-demodulation RS.For example, when the RS k/n for occupying symbol in the last symbol of subframe is sent
When, the time-domain signal of k/n is carried out repetition n times according to the time-domain signal of 1/n in the time domain and reverts to one by the second communication node
Complete symbol, is then demodulated again, as shown in figure 11.
Step 1001, the second communication node obtain channel measurement according to the reference signal, by the channel measurement
As a result the first communication node is fed back to.
In the application, channel measurement can refer to the channel quality of the corresponding channel of reference signal, alternatively, channel matter
Measure preferable channel, etc..
In the application, channel measurement can be carried in SCI MAC CE signaling and send by the second communication node
To the first communication node so that the first communication node using channel measurement as the reference of channel quality when sending signal according to
According to improving the transmission rate of the data on SL to realize the adaptive transmitting-receiving of data.
In the application, in channel there are in the case where reciprocity, the second communication node can also make channel measurement
The reference frame of channel quality when to send signal.
Referring to Figure 12, present applicant proposes a kind of first communication nodes, comprising:
First determining module, for determining reference signal resource；
First sending module, for sending reference signal on the reference signal resource；
First receiving module, the channel measurement obtained for receiving the second communication node according to the reference signal.
Referring to Figure 13, present applicant proposes a kind of second communication nodes, comprising:
Second determining module, for determining reference signal resource；
Second receiving module is demodulated for receiving signal on the reference signal resource, and from received signal
The reference signal that first communication node is sent；
Second sending module, for obtaining channel measurement according to the reference signal, by the channel measurement
Feed back to the first communication node.
Referring to Figure 14, present applicant proposes a kind of first communication node, including first processor and first computer-readable
Storage medium is stored with the first instruction in first computer readable storage medium, when first instruction is by described first
Processor realizes the channel measuring method of any of the above-described kind of the first communication node side when executing.
Referring to Figure 15, present applicant proposes a kind of second communication node, including second processor and second computer it is readable
Storage medium is stored with the second instruction in the second computer readable storage medium storing program for executing, when second instruction is by described second
Processor realizes the channel measuring method of any of the above-described kind of the second communication node side when executing.
Present applicant proposes a kind of computer readable storage mediums, are stored thereon with computer program, which is characterized in that institute
The step of stating the channel measuring method that any of the above-described kind of the first communication node side is realized when computer program is executed by processor.
Present applicant proposes a kind of computer readable storage mediums, are stored thereon with computer program, which is characterized in that institute
The step of stating the channel measuring method that any of the above-described kind of the second communication node side is realized when computer program is executed by processor.
Wherein, the first computer readable storage medium or second computer readable storage medium storing program for executing include at least one of:
Flash memory, hard disk, multimedia card, card-type memory are (for example, safe digital card (SD card, Secure Digital Memory
Card) or data register (DX, Data Register) memory etc.), random access storage device (RAM, Random Access
Memory), static random-access memory (SRAM, Static Random Access Memory), read-only memory (ROM,
Read Only Memory), electrically erasable programmable read-only memory (EEPROM, Electrically Erasable
Programmable Read-Only Memory), programmable read only memory (PROM, Programmable Read-Only
Memory), magnetic storage, disk, CD etc..
First processor or second processor can be central processing unit (CPU, Central Processing Unit),
Controller, microcontroller, microprocessor or other data processing chips etc..
Referring to Figure 16, present applicant proposes a kind of channel measurement system, including any of the above-described kind of the first communication node and upper
State any second communication node.
Although embodiment disclosed by the application is as above, the content only for ease of understanding the application and use
Embodiment is not limited to the application.Technical staff in any the application fields, is taken off not departing from the application
Under the premise of the spirit and scope of dew, any modification and variation, but the application can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (19)
1. a kind of channel measuring method, comprising:
First communication node determines reference signal resource, sends reference signal on the reference signal resource；
First communication node receives the channel measurement that the second communication node is obtained according to the reference signal.
2. channel measuring method according to claim 1, which is characterized in that first communication node determines reference signal
After resource, this method further include:
First communication node sends the first instruction information of the reference signal resource.
3. channel measuring method according to claim 1 or 2, which is characterized in that the ginseng of different first communication nodes
Examine signal resource difference.
4. channel measuring method according to claim 1 or 2, which is characterized in that first communication node determines reference
Signal resource includes:
First communication node determines the reference signal resource in reference signal resource pond.
5. channel measuring method according to claim 4, which is characterized in that the reference signal send resource pool use with
Under any mode determine:
Determine that the reference signal in the resource pool of side chain road sends resource pool according to the first configuration information of third communication node；
The reference signal being pre-configured in the resource pool of side chain road sends resource pool；
Determine that the reference signal in the resource pool of side chain road sends money according to the second indication information of second communication node
Source pond.
6. channel measuring method according to claim 1 or 2, which is characterized in that the reference signal resource is using following
Any mode determines:
The reference signal resource is determined according to the second configuration information of third communication node；
The reference signal money is determined according to the mapping relations that the reference signal sends resource pool and the reference signal resource
Source；
It is sent in resource pool in the reference signal and randomly chooses at least one resource as the reference signal resource；
It sends in the reference signal and is measured in at least partly resource in resource pool, according to measurement result selection at least one
A resource is as the reference signal resource；
The resource for determining the second communication node feedback is the reference signal resource；
Select at least one resource as the reference signal resource from the resource that second communication node is fed back.
7. channel measuring method according to claim 1 or 2, which is characterized in that the reference signal sends resource pool packet
Include at least one following information:
Time-domain resource, frequency domain resource, transmission bandwidth, transmission comb, duration, mapping mode, power, cyclic shift parameter, letter
Number waveform accounting parameter.
8. a kind of channel measuring method, comprising:
Second communication node determines reference signal resource, receives signal on the reference signal resource, and from received signal
In demodulate the first communication node transmission reference signal；
Second communication node obtains channel measurement according to the reference signal, and the channel measurement is fed back to first
Communication node.
9. channel measuring method according to claim 8, which is characterized in that described to receive signal on reference signal resource
It is afterwards, described before demodulating the reference signal that the first communication node is sent in received signal further include:
Signal reverts to a complete signal based on the received.
10. channel measuring method according to claim 8 or claim 9, which is characterized in that second communication node determines reference
Signal resource includes:
Second communication node determines that reference signal resource receives the reference signal resource in resource pool.
11. channel measuring method according to claim 10, which is characterized in that the reference signal receives resource pool and uses
Any mode determines below:
Determine that the reference signal in the resource pool of side chain road receives resource pool according to the third configuration information of third communication node；
The reference signal being pre-configured in the resource pool of side chain road receives resource pool；
Indicate that information determines that the reference signal in the resource pool of side chain road receives resource pool according to the third of the first communication node.
12. channel measuring method according to claim 8 or claim 9, which is characterized in that the reference signal resource is using following
Any mode determines:
The reference signal resource is determined according to the 4th configuration information of third communication node；
The reference signal resource is determined according to the first of first communication node the instruction information；
The reference signal money is determined according to the mapping relations that the reference signal receives resource pool and the reference signal resource
Source；
It is measured in at least partly resource in the reference signal resource pond, at least one money is selected according to measurement result
Source is as the reference signal resource.
13. a kind of first communication node, comprising:
First determining module, for determining reference signal resource；
First sending module, for sending reference signal on the reference signal resource；
First receiving module, the channel measurement obtained for receiving the second communication node according to the reference signal.
14. a kind of second communication node, comprising:
Second determining module, for determining reference signal resource；
Second receiving module for receiving signal on the reference signal resource, and demodulates first from received signal
The reference signal that communication node is sent；
Second sending module feeds back the channel measurement for obtaining channel measurement according to the reference signal
To the first communication node.
15. a kind of first communication node, including first processor and the first computer readable storage medium, first computer
The first instruction is stored in readable storage medium storing program for executing, which is characterized in that when first instruction is executed by the first processor
Realize channel measuring method as described in any one of claims 1 to 7.
16. a kind of second communication node, including second processor and second computer readable storage medium storing program for executing, the second computer
The second instruction is stored in readable storage medium storing program for executing, which is characterized in that when second instruction is executed by the second processor
Realize such as the described in any item channel measuring methods of claim 8~12.
17. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of channel measuring method as described in any one of claims 1 to 7 is realized when being executed by processor.
18. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of channel measuring methods as described in any item such as claim 8~12 are realized when being executed by processor.
19. a kind of channel measurement system, comprising: described in the first communication node and claim 16 described in claim 15
Two communication nodes.
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