CN105636187B - Guarantee the method for message integrity detection in D2D communication - Google Patents
Guarantee the method for message integrity detection in D2D communication Download PDFInfo
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- CN105636187B CN105636187B CN201410621006.0A CN201410621006A CN105636187B CN 105636187 B CN105636187 B CN 105636187B CN 201410621006 A CN201410621006 A CN 201410621006A CN 105636187 B CN105636187 B CN 105636187B
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Abstract
The present invention provides one kind methods that processing is directly found in broadcasting user equipment (UE), comprising: the transmission of (A) protocol layer needs the instruction of broadcast discovery messages to medium (MAC) layer；(B) MAC layer, which is sent, transmits the first transmission time for finding message to protocol layer；(C) protocol layer sends discovery information to MAC layer, wherein discovery information includes message integrity (MIC) information.By using the technical solution in the present invention, MAC layer and protocol layer time standard having the same are enabled to, and reduces conflicting between MAC layer and protocol layer in UE, facilitates the accurate delivery for directly finding message；Also can the transmission power consumption to UE be effectively controlled.
Description
Technical field
The present invention is generally related to wireless communication field, and more specifically, being related to one kind ensures message in D2D communication
The method of integrity detection.
Background technique
LTE Rel-12 relates to the direction of device-to-device (Device to device, D2D) adjacent service, main
Purpose is directly to find to provide the feasible method in public safety and not common security scenario with D2D direct communication for D2D.
For directly finding (Direct Discovery or ProSe Direct Discovery), there are two kinds for finding message
Broadcast radio-resource-configuration type, wherein Class1 is user equipment (UE) automated wireless resource selection, type 2 be by
The radio-resource-configuration of base station (eNB) scheduling.
The direct discovery of both types, discovery message can repeatedly be transmitted in the discovery period.For Class1,
In each discovery period, UE is based on transmission probability p and transmits on randomly selected radio resource, here p are as follows:
1.0 p≤1 <
2.p={ 0.25,0.5,0.75,1 }
When UE prepares transmission discovery message, it will judge whether it can transmit according to transmission probability p, here with p quilt
It is configured to for 0.25, if UE generates the random number between one 0 to 1, if the random number is lower than 0.25, then UE can transmit this
It was found that message；Otherwise UE cannot transmit the discovery message.
Integrity protection by using message integrity check (Message Integrity Check, MIC) is further
So that adjacent service (Proximity Services, ProSe) functional block is able to verify that broadcast UE was allowed in some period
Broadcast discovery messages, it includes ProSe application code (ProSe Application Code).With discovery time slot (Discovery
Slot) associated to be used to calculate and verify MIC based on the general count value for coordinating (UTC) time.In order to ensure broadcasting UE
The identical count value based on UTC is obtained with UE is monitored, broadcast UE includes minimum 4 count values in the discovery message.
Fig. 1 is the schematic diagram for the three layer protocol frameworks that UE is used for PC5 interface when handling direct discovery.In the prior art
In, when broadcast UE wants transmission discovery message, the interaction between this three layers will be also easy to produce conflict.That is, if not right
The interaction is specifically defined, and only spontaneously or is randomly implemented by UE, and broadcast UE may have vicious base for sending
In the discovery message of the count value of UTC, and broadcasts UE and will not regenerate and disappear with the new discovery based on UTC count value
Breath.
In addition, there is also following two problems for the prior art:
(1) for the direct discovery of Class1, when radio resource pond is with the Reference Signal Received Power value (Reference of UE
Signal Receiving Power, RSRP) configuration when, the RSRP value of UE may change in a discovery period, that
Whether UE, which continues, is broadcasted, this needs further determines that；
(2) if eNB does not know that the transmission power level (Range Class) of UE, eNB need to mention for each power grade
For corresponding power contorl parameters for UE for its ProSe discovery transmission use, it is clear that this will lead to more signalings at
This.
Therefore, the treatment mechanism inside UE when needing to a kind of to direct discovery, between UE and eNB is defined.
Summary of the invention
In view of the above problems, the present invention determines the treatment mechanism inside UE when directly finding, between UE and eNB
Justice, the conflict generated when to avoid communication, and then reduce communications cost.
One aspect of the present invention proposes a kind of method that processing is directly found in broadcasting user equipment (UE), comprising: (A)
Protocol layer transmission needs the instruction of broadcast discovery messages to medium (MAC) layer；(B) MAC layer sends the transmission discovery and disappears
First transmission time of breath is to the protocol layer；(C) protocol layer sends the discovery information to the MAC layer, wherein institute
Stating discovery information includes message integrity (MIC) information.
Preferably, the method also includes: (D) described MAC layers sends the discovery information to physical layer.
Preferably, the step (B) further include: automatically selection is used for transmission institute to the MAC layer from radio resource pond
The radio resource for stating discovery message, so that it is determined that first transmission time.
Preferably, first transmission time is UTC time or System Frame Number and subframe numbers, and described first
Transmission time corresponds at least one discovery period.
Preferably, the step (C) further include: the protocol layer is based on first transmission time and generates the MIC letter
Breath, wherein if the first transmission time information is System Frame Number and subframe numbers, the protocol layer is transmitted described first
Time is converted into UTC time, then generates MIC information according to the corresponding count value of the UTC time.
Preferably, the step (C) further include: when first transmission time includes the multiple of corresponding multiple discovery periods
When transmission time information, the protocol layer generates corresponding MIC information and phase according to the multiple transmission time information respectively
The discovery information answered.
Preferably, the method also includes: in the discovery period corresponding with first transmission time, if the MAC
The discovery message can not be sent to the physical layer or the physical layer since transmission probability can not due to transmission probability by layer
When discovery message from the MAC layer is broadcasted, the protocol layer judge whether need the subsequent discovery period after
Supervention send discovery information, if desired continues to send, then repeatedly step (A) to (C)；Alternatively, with first transmission time pair
In the discovery period answered, when the MAC layer can be when the discovery periodic broadcasting finds message, by institute based on the judgement of transmission probability
It states the first transmission time and is sent to the protocol layer.
Preferably, when the MAC layer reselects the radio resource for sending the discovery message, then it, which sends, passes
Second transmission time of the defeated discovery message is sent to the protocol layer；The protocol layer is obtained according to second transmission time
To new MIC information, the discovery message including the new MIC information is sent to the MAC layer；If when with the described second transmission
Between corresponding count value it is constant, then the protocol layer sends the constant instruction of discovery message to the MAC layer, the MAC layer after
It is continuous to be sent using its discovery message saved in second transmission time.
Preferably, the broadcast UE is based on the Reference Signal Received Power about main serving cell measured by its own
(RSRP) value selects corresponding radio resource pond, wherein when the RSRP value of the broadcast UE changed and in the current discovery period
When except the range of the corresponding RSRP value of selected radio resource, the broadcast UE continues in current discovery periodic broadcasting institute
State discovery message, it is preferred that the broadcast UE keeps its transimission power constant to broadcast the discovery message；Or work as the broadcast
When the RSRP value of UE is in except the range of the corresponding RSRP value of current discovery period selected radio resource, the broadcast UE
It goes off the air the discovery message；Or the broadcast UE continues to broadcast the discovery message in the currently discovery period, if its RSRP
Value is greater than the corresponding maximum RSRP value of current discovery period selected radio resource, then the broadcast UE reduces its transmission
Power.
Preferably, the MAC layer requests the radio resource for broadcasting the discovery message, Jin Ergen to base station (eNB)
First transmission time is determined by the radio resource for broadcasting discovery information of eNB distribution according to received.
The invention also provides one kind methods that processing is directly found in monitoring users equipment (UE), comprising: when described
When monitoring UE and detecting discovery message, physical layer or MAC layer record detect the detection time of discovery message, and by the spy
The survey time is sent to protocol layer.
Preferably, the method also includes: the monitoring UE sends matching report to adjacent service functional block, wherein institute
Stating matching report includes the count value based on UTC time corresponding with the detection time and the discovery message detected.
The invention also provides one kind methods that processing is directly found in base station (eNB), comprising: reception is set from user
The request of the radio resource for being used for transmission discovery message of standby (UE)；Based on the request, transmission is used for transmission the discovery and disappears
The configuration information of the radio resource of breath is to the UE.
Preferably, the eNB is the method that UE configures radio resource pond, wherein each radio resource pond is right respectively
Answer the range of different Reference Signal Received Power (RSRP) value；And/or the eNB receives the transimission power grade letter of UE
Breath, and be that the UE configures power contorl parameters based on the transimission power class information.
The invention also provides a kind of user equipmenies comprising protocol layer, MAC layer and physical layer, wherein the protocol layer
It is configured as the instruction for needing to send discovery message being sent to the MAC layer；The MAC layer is configured as that the hair will be transmitted
First transmission time of existing message is sent to the protocol layer；Wherein, the protocol layer is additionally configured to pass based on described first
The defeated time sends the discovery information to the MAC layer.
In addition, enabling to MAC layer and protocol layer time having the same to mark by using the technical solution in the present invention
Standard, and conflicting between MAC layer and protocol layer in UE is reduced, facilitate the accurate delivery for directly finding message；Also can
It is enough that the transmission power consumption of UE is effectively controlled.
Detailed description of the invention
After description by reference to a specific embodiment of the invention given by following drawings, it is better understood with this
Invention, and other objects of the present invention, details, features and advantages will become apparent.In the accompanying drawings:
Fig. 1 is the three-decker schematic diagram for the PC5 interface that UE is used for when handling direct discovery；
Fig. 2 be according to an embodiment of the present invention Class1 discovery in broadcast UE in protocol layer and MAC in discovery procedure
Interaction schematic diagram；
Fig. 3 is that the interaction between the protocol layer and MAC layer for broadcasting UE in type 2 is found according to an embodiment of the present invention is shown
It is intended to.
Specific embodiment
The preferred embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without the embodiment party that should be illustrated here
Formula is limited.On the contrary, these embodiments are provided so that this disclosure will be more thorough and complete, and can be by the disclosure
Range is fully disclosed to those skilled in the art.
In the present invention, it provides between protocol layer and MAC (Medium Access Control, abbreviation medium) layer
Detailed interaction mechanism.
When broadcasting UE decision broadcast discovery messages, protocol layer indicates that its MAC layer is found message and needs to transmit.When
After MAC layer obtains the radio resource configured for discovery message transmission, MAC layer will be corresponding with the radio resource of the configuration
UTC time or transmit time of the discovery message and be sent to protocol layer.Then, protocol layer obtains the MIC based on UTC time,
And the entire discovery message comprising MIC is sent to MAC layer.
If MAC layer is being unable to transmission discovery due to the transmission probability in the current discovery period (Class1 discovery)
Message, the MAC layer for broadcasting UE needed in the next discovery period, new transmission time were sent its protocol layer, to assist
View layer judges whether to need to regenerate MIC and the discovery message comprising new MIC, is needing to regenerate MIC and comprising new MIC
Discovery message, the new MIC based on new transmission time can be obtained, and will send out with the discovery message of the new MIC
It send to MAC layer.
For monitoring UE, physical layer or MAC layer need to record its time for detecting discovery message.Physical layer or MAC
Layer needs the detection time being sent to protocol layer.When monitoring UE sends matching report to ProSe functional block, in the matching
In report, need to carry the count value based on detection time (being used to obtain MIC).ProSe function needs the time to go to test
Demonstrate,prove broadcast UE.
When broadcasting UE and being intended for finding that message is transmitted to eNB requesting radio resource, broadcast UE is by its transimission power grade
(Range Class) is included in ProSeUEinformation message.Or MME can send the transimission power etc. of the UE
Grade is to eNB, so that the eNB can configure correct power contorl parameters for UE.
Embodiment 1: Class1 discovery
For Class1, eNB is configured to the radio resource pond that UE is provided for broadcasting discovery information, which may include
In system information block SIB.Broadcast UE automatically selects radio resource from specified radio resource pond and broadcasts discovery letter
Breath.
Assuming that UE wants broadcast discovery information, and it is authorized and obtain necessary information, for example when UTC
Between, ProSe application code, discovery key (Discovery key) etc..The UE determines usage type 1 to broadcast discovery information.
Fig. 2 be according to an embodiment of the present invention Class1 discovery in broadcast UE in protocol layer and MAC in discovery procedure
Interaction schematic diagram.
For the discovery mechanism of Class1, for UE when sending information, be intended to consider currently to find the transmission in period can
Energy property, i.e., by foundation transmission probability p and the comparison result of a random number to determine whether it can be in current discovery week
Phase carries out broadcast discovery information.
The step of judgement transmission possibility, can carry out in MAC layer or physical layer.For being judged in the mac layer
Embodiment 1 is illustrated.
S21: broadcast requests are sent MAC layer by protocol layer (ProSe Protocol layer).
In this step, if broadcast discovery messages are wanted in protocol layer decision, the instruction broadcasted will be sent to
MAC layer.
S22:MAC layers are automatically chosen for the radio resource transmitted.
In this step, MAC layer is automatically the discovery message selection radio resource for needing to broadcast, and the mode of selection then may be used
To be adjusted as needed, for example selected with random or UE specified algorithm.MAC determines the nothing of broadcast discovery messages herein
Line resource includes broadcasting the temporal information and frequency information of the discovery message.In the present invention, by the time of broadcast discovery messages
Information is known as transmission time.
S23:MAC layers send the temporal information of transmission discovery message to protocol layer.
In this step, the first transmission time that MAC layer will transmit the discovery message is sent to protocol layer, this first
Transmission time can be UTC time or System Frame Number and subframe numbers.It is understood that the first transmission time can be right
It answers one or more discovery periods, i.e. MAC layer informs protocol layer when find cycle T 0 it can find cycle T 1, T2 or more
Multiple transmission times that more periods is transmitted.
S24: protocol layer sends discovery message to MAC layer.
In this step, when protocol layer receives the temporal information for the transmission discovery message that MAC layer is sent in step S23
Afterwards, MIC information will be generated according to the count value based on the UTC- time.If the first transmission time information be System Frame Number and
Subframe numbers, after protocol layer is translated into UTC time, then according to the corresponding count value generation MIC of UTC time, discovery message will
Minimum 4 comprising count value and MIC.Complete discovery information is sent to MAC layer by protocol layer.
If the first transmission time information includes multiple transmission time information in corresponding multiple discovery periods, protocol layer will be according to
Corresponding MIC is generated according to multiple transmission time information and finds information accordingly, then by the hair in correspondence multiple discovery periods
Existing information is sent to MAC layer.It should be noted that if the count value phase corresponding to the transmission time of different transmission cycles
Together, then the MIC and discovery information ultimately generated is identical.
S25:MAC layers send discovery message to physical layer.
In this step, after MAC layer receives discovery message, the discovery information will be sent to physical layer.
In the same discovery period, UE generally comprises initial transmission and retransmits two steps, wherein in the step of initial transmission
Suddenly, UE will judge transmission possibility.MAC layer will generate the random number between one 0 to 1, if the random number is lower than biography
Defeated probability p, then broadcast is found that information, i.e. MAC layer will be seen that information is transmitted to physical layer, will be seen that information is wide by physical layer by UE
Broadcast is gone, and after having executed initial transmission, within the discovery period, physical layer will retransmit the discovery information.In this step,
MAC layer will notify the temporal information and frequency information of physical layer transmission discovery information.If random number is greater than or equal to conveyer
Rate p, UE can not have found message in current discovery periodic broadcasting.
If broadcast UE cannot transmit discovery message due to transmission probability p in the currently discovery period, MAC layer will lead to
Know that protocol layer sends failure in the current discovery period.When protocol layer learn MAC layer currently discovery the period can not transmit when,
Information will be found it is first determined whether needing to send in the subsequent discovery period, if desired continue to send, if it is desired, then repeat
Step S21 to S24.When protocol layer receives the new transmission time from MAC layer, will be obtained according to new transmission time
Then new discovery message including new MIC information is sent to MAC layer by new MIC information.It is somebody's turn to do correspondingly, MAC layer is then used
New discovery message replaces current discovery message, to be sent in corresponding transmission time.Or when protocol layer is found newly
The corresponding count value of transmission time is constant, then finds that message remains unchanged, and protocol layer indicates that discovery message is constant to MAC, MAC layer
The discovery message currently saved is continued to use to be sent in new transmission time.It should be noted that if broadcast UE is working as
Preceding discovery periodic broadcasting discovery message, protocol layer still may be required in next discovery periodic broadcasting discovery message, this
Shi Chongfu step S21 to S25.
It is understood that when the first above-mentioned transmission time corresponds to multiple transmission times in multiple discovery periods,
MAC layer can also be tied in each discovery period its status report to protocol layer in multiple discovery period
Shu Hou, to protocol layer, whether transmission state transmits discovery information and transmits how many times discovery information for unified report.
In the above process, transmission possibility judgement is carried out in MAC layer, it is similar, it can also be judged within the physical layer.
When the step of possibility is transmitted in judgement carries out within the physical layer, if physical layer can not will come from MAC layer because of transmission probability p
Discovery message notify MAC layer when being broadcasted, MAC layer is when learning that physical layer can not be broadcasted after notification protocol layer, protocol layer
It decides whether to find information in new discovery periodic transfer.
There are also other implementations by step S23, in the discovery period corresponding with first transmission time, when described
MAC layer can be transmitted when the discovery periodic broadcasting finds message by described first in step S23 based on the judgement of transmission probability
Time is sent to the protocol layer.It does not need to judge whether energy broadcast discovery messages according to transmission probability in step S25 at this time.Such as
Fruit is in the first transmission time corresponding discovery period, when MAC layer is unable to broadcast discovery messages based on transmission probability judgement,
The instruction for being unable to broadcast discovery messages now is sent to protocol layer.
Class1 is found, is the method in UE configuration selection radio resource pond by network, network can provide selection to UE
The RSRP value range in radio resource pond, then UE select according to the RSRP value about main serving cell that it is measured corresponding
Radio resource pond.
For each radio resource pond, it is configured with maximum RSRP value and the smallest RSRP value, i.e. codomain [RSRPmin,
RSRPmax] corresponding to a scheduled radio resource pond, UE will determine according to what it was measured about the RSRP value of main serving cell
Surely corresponding radio resource pond is selected, selection is used for transmission the radio resource of discovery information in the radio resource pond.
It is understood that RSRP value measured by UE is often related to the distance between eNB to UE, therefore, for moving
Dynamic UE, RSRP value are that there may be variations.When the variation of RSRP value, may just be selected in the UE of broadcast discovery messages
Other radio resource ponds transmit message, it is clear that this be easy to cause conflict.In order to solve above-mentioned conflict, the present invention proposes phase
The solution answered.
Scheme 1:
(already below RSRP when the variation of the RSRP value measured by the UEmin, or it is higher than RSRPmax), in current discovery week
Phase, UE will continue broadcast discovery messages, it is preferred that UE (is suitable for initial transmission using same transmission power broadcast discovery messages
Message is found with retransmitting), it is clear that a possibility that technical solution is able to ascend discovery.Class1 is found, UE is according to selected by
Radio resource corresponding to power contorl parameters determine the transimission powers of broadcast discovery messages.If PUCCH radio resource and use
Divided in the radio resource of the discovery by FDM, the RSRP value of the UE even more than current radio resource that becomes larger is corresponding maximum
RSRP value may will affect the PUCCH of the serving cell.
Scheme 2:
When UE has found that its current RSRP value is not belonging to currently find that selected radio resource pond is corresponding in the period
The codomain of RSRP, that is, be not belonging to [RSRPmin, RSRPmax], UE will go off the air and find message.
Scheme 3:
In the currently discovery period, UE continues broadcast discovery messages, if its RSRP value increases to greater than RSRPmax, then UE is reduced
Its transimission power.I.e. the power of UE actual broadcast discovery message is lower than UE according to power control corresponding to selected radio resource
Parameter determines the transimission power of broadcast discovery messages.Preferably, reduced numerical value is equal to the RSRP and RSRP that UE is surveyedmaxDifference
Value.
For monitoring UE, when it detects discovery message, physical layer or MAC layer will record it and detect discovery message
Time, and the detection time is sent to protocol layer.Monitoring UE sends matching report to ProSe functional block, wherein matching
Report includes the corresponding count value based on UTC time of detection time and the discovery message detected.Then, pass through ProSe function
Energy block is reported to verify broadcast UE based on the matching, for subsequent operation.
Embodiment 2: type 2 is found
From the foregoing it will be appreciated that finding for type 2, UE is needed from eNB request (for example being requested by RRC signaling) for wide
Broadcast the radio resource of existing information.Correspondingly, eNB informed by RRC signaling UE distribute to its for broadcast discovery information
Radio resource, including temporal information and frequency information.
Fig. 3 is the interaction between the protocol layer and MAC layer for broadcasting UE in the discovery of type 2 according to an embodiment of the present invention.
S31: broadcast requests are sent MAC layer by protocol layer.
When in this step, if broadcast discovery messages are wanted in protocol layer decision, the instruction broadcasted will be sent
To MAC layer.
S32:MAC layers to eNB requesting radio resource.
In this step, MAC layer triggering rrc layer is to be used for transmission the radio resource for finding message to eNB request.UE will lead to
Cross the radio resource that ProSeUEInformation signaling is used for transmission discovery message to eNB request.
S33:MAC layers of acquisition wireless resource configuration.
In this step, rrc layer receives the configuration information for being used for transmission the radio resource of discovery message from eNB, then
Radio-resource-configuration is sent to MAC layer by rrc layer.
S34:MAC layers send the temporal information of transmission discovery message to protocol layer.
In this step, after MAC layer obtains the radio-resource-configuration that transmission finds information, radio-resource-configuration institute is right
The temporal information (i.e. transmission time) for the transmission discovery message answered is sent to protocol layer.
S35: protocol layer sends discovery message to MAC layer.
In this step, after the temporal information that protocol layer receives transmission discovery message, according to transmission time institute
The corresponding count value based on UTC time obtains MIC information, and sends the discovery message including the MIC information to MAC layer.
S36:MAC layers send discovery message to physical layer.
In this step, MAC layer notifies the radio resource of physical layer distribution to transmit discovery message, wherein the distribution
Radio resource include the discovery period initial transmission discovery information radio resource and repeatedly transmission find information nothing
Line resource.
By step S31-S36, broadcasting UE is realized to eNB requesting radio resource, and according to the radio resource distributed
To broadcast the process of discovery information.Compared to embodiment 1, the radio resource as used by broadcast UE is distributed by eNB, because
This its do not consider to transmit the influence of probability when transmission finds information.
Similar to Example 1, when monitoring UE detects discovery message, when physical layer or MAC layer will be the detections
Between be sent to protocol layer.Equally, it when monitoring UE sends matching report to ProSe functional block, needs to take in matching report
Band with corresponding to detection time based on the count value of UTC time.The ProSe functional block needs the count value based on UTC time
To verify broadcast UE.
In this embodiment, when broadcast UE wants from eNB request for finding the radio resource of message transmission, which will
Its transimission power grade is included in ProSeUEInformation information.Alternatively, mobility management entity (Mobility
Management Entity, MME) the transimission power grade of UE can be sent to eNB.To which eNB can be the broadcast of the UE
It was found that the correct power contorl parameters of information configuration, different transimission power grades needs eNB to configure different power control ginsengs
Number such as transmission power.
It will be appreciated to those of skill in the art that above-mentioned state is used only for example, it is not intended to limit the present invention
Application range.Those skilled in the art can be directed to every kind of specific application, realize described function in a manner of flexible, but
It is that this realization decision should not be interpreted as causing a departure from the scope of this disclosure.
Claims (12)
1. a kind of method that processing is directly found in broadcasting user equipment (UE), comprising:
(A) protocol layer transmission needs the instruction of broadcast discovery messages to medium (MAC) layer；
(B) MAC layer sends transmission first transmission time for finding message to the protocol layer, comprising: the MAC layer
To base station (eNB) request for broadcasting the radio resource of the discovery message, and then according to the received use distributed by eNB
First transmission time is determined in the radio resource of broadcast discovery information；And the broadcast UE sends out its transimission power grade
It send to the eNB；
(C) protocol layer sends the discovery information to the MAC layer, wherein the discovery information includes message integrity
(MIC) information.
2. the method as described in claim 1, further includes:
(D) MAC layer sends the discovery information to physical layer.
3. method according to claim 2, the step (B) further include:
The MAC layer automatically selection from radio resource pond is used for transmission the radio resource of the discovery message, so that it is determined that
First transmission time.
4. method as claimed in claim 3, wherein
First transmission time is UTC time or System Frame Number and subframe numbers, and first transmission time is corresponding
At least one discovery period.
5. method as claimed in claim 4, the step (C) further include:
The protocol layer is based on first transmission time and generates the MIC information, wherein
If the first transmission time information is System Frame Number and subframe numbers, the protocol layer is by first transmission time
It is converted into UTC time, then generates MIC information according to the corresponding count value of the UTC time.
6. method as claimed in claim 4, the step (C) further include:
When first transmission time includes multiple transmission time information in corresponding multiple discovery periods, the protocol layer foundation
The multiple transmission time information generates corresponding MIC information respectively and finds information accordingly.
7. method as claimed in claim 3, wherein
In the discovery period corresponding with first transmission time, if the MAC layer can not be by the hair due to transmission probability
Existing message is sent to the physical layer or the physical layer since transmission probability can not be by the discovery message from the MAC layer
When being broadcasted, the protocol layer judges whether to need to continue in the subsequent discovery period to send discovery information, if desired continues
It sends, then repeatedly step (A) to (C)；Alternatively,
In the discovery period corresponding with first transmission time, when the MAC layer can be at this based on transmission probability judgement
It was found that first transmission time is sent to the protocol layer by the MAC layer when finding message described in periodic broadcasting.
8. the method for claim 7, wherein
When the MAC layer reselects the radio resource for sending the discovery message, then it, which sends, transmits the discovery
Second transmission time of message gives the protocol layer；
The protocol layer obtains new MIC information according to second transmission time, and the discovery including the new MIC information is disappeared
Breath is sent to the MAC layer；
If count value corresponding with second transmission time is constant, the protocol layer sends discovery message to the MAC layer
Constant instruction, the MAC layer continue to use the discovery message that it has been saved and are sent in second transmission time.
9. method as claimed in claim 3, further includes:
The broadcast UE is based on Reference Signal Received Power (RSRP) the value selection about main serving cell measured by its own
Corresponding radio resource pond, wherein
When the RSRP value of the broadcast UE changes and in the corresponding RSRP value of current discovery period selected radio resource
When except range, the broadcast UE continued to broadcast the power of the discovery message in the current discovery period；Or
When the RSRP value of the broadcast UE be in the corresponding RSRP value of current discovery period selected radio resource range it
When outer, the broadcast UE goes off the air the discovery message；Or
The broadcast UE continues to broadcast the discovery message in the currently discovery period, if its RSRP value is greater than current discovery period institute
The corresponding maximum RSRP value of the radio resource of selection, then the broadcast UE reduces the power of its transmission.
10. a kind of method that processing is directly found in monitoring users equipment (UE), comprising:
When the monitoring UE detects discovery message, physical layer or MAC layer record detect the detection time for finding message,
And the detection time is sent to protocol layer.
11. method as claimed in claim 10, further includes
The monitoring UE sends matching report to adjacent service functional block, wherein when the matching report includes with the detection
Between the corresponding count value based on UTC time and the discovery message detected.
12. a kind of method that processing is directly found in base station (eNB), comprising:
Receive the request of the radio resource for being used for transmission discovery message from user equipment (UE)；
Based on the request, sends and be used for transmission the configuration information of the radio resource of the discovery message to the UE；
Wherein, the eNB is the method in UE configuration measurement radio resource pond, wherein each radio resource pond respectively corresponds
The range of different Reference Signal Received Power (RSRP) value；And/or
The eNB receives the transimission power class information of UE, and is that the UE configures function based on the transimission power class information
Rate control parameter.
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| US11856600B2 (en) | 2016-09-30 | 2023-12-26 | Lg Electronics Inc. | Method and apparatus for terminal self-reselecting resource based on priority in wireless communication system |
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