WO2014107871A1 - 通信链路的选择方法和装置 - Google Patents

通信链路的选择方法和装置 Download PDF

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Publication number
WO2014107871A1
WO2014107871A1 PCT/CN2013/070336 CN2013070336W WO2014107871A1 WO 2014107871 A1 WO2014107871 A1 WO 2014107871A1 CN 2013070336 W CN2013070336 W CN 2013070336W WO 2014107871 A1 WO2014107871 A1 WO 2014107871A1
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WO
WIPO (PCT)
Prior art keywords
link
user equipment
measurement
base station
candidate
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Application number
PCT/CN2013/070336
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English (en)
French (fr)
Inventor
吴联海
常宁娟
邱涛
徐海博
Original Assignee
富士通株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/CN2013/070336 priority Critical patent/WO2014107871A1/zh
Priority to CN201380066489.6A priority patent/CN104871633B/zh
Publication of WO2014107871A1 publication Critical patent/WO2014107871A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • the present invention relates to a communication system, and more particularly to a method and apparatus for selecting a communication link in a D2D (Device to Device) communication mode.
  • D2D Device to Device
  • the user when the user (UE, User Equipment) communicates with the user of the opposite end, the user needs to transmit the data sent to the opposite end user to the base station regardless of the location of the opposite end user, and then The core network sends data to the peer user by the base station serving the peer user. Conversely, the data sent by the peer user is also sent through the path of the "base station-core network-base station". Received by the user through the air interface. In this way, there will be a situation where two users who exchange data with each other are located very close, such as under a neighboring base station or under the same base station, but because of the limitations of existing wireless communication methods, they communicate with each other.
  • the data still needs to be communicated through the "base station - core network - base station".
  • this communication method not only burdens the core network, but also consumes too much energy of the terminal, because in this case, the distance between the terminal and the base station is often More than the distance between the two terminals, so the terminal needs more energy to transmit data. Therefore, in this case, two users who are very close can adopt D2D communication, that is, directly transmit and receive data through the D2D link between the two terminals, as shown in Fig. 1 and Fig. 2.
  • UE1 and UE2 report potential UEs that can perform D2D communication with themselves through the Discovery mechanism. According to the reported result, when the network side knows that the channel condition between UE1 and UE2 is suitable for D2D mode communication, the base station can configure UE1 and UE2 to perform direct data transmission without passing through the core network. Of course, the control signaling supporting D2D communication is still sent by the eNB.
  • the D2D communication mode between UE1 and UE2 mainly includes direct communication (see Figure 1) and local route (see Figure 2).
  • the cellular link refers to the communication method in which the user plane data is transmitted through the core network.
  • the inventors have found that, on the one hand, for two UE1 and UE2 performing D2D communication, when the channel quality of the D2D link is deteriorated, it is necessary to select a cellular communication mode; Two UE1 and UE2 are performing cellular communication. When the load of cellular communication is heavy, it is necessary to select Choose the D2D communication method. The existing mechanism does not provide a solution to the above situation.
  • An object of the present invention is to provide a method and an apparatus for selecting a communication link, so as to reduce unnecessary UE measurement and reporting frequency, and save UE power and signaling overhead.
  • a method for selecting a communication link includes:
  • the user equipment measures the channel quality of the D2D link currently being used when performing D2D communication with the peer device;
  • the base station configures a candidate D2D link for the user equipment, the user equipment measures channel quality of the candidate D2D link;
  • the user equipment sends a measurement result to the base station according to a predetermined policy, so that the base station selects a communication link for the user equipment accordingly.
  • a method for selecting a communication link includes:
  • the base station performs measurement configuration on the user equipment, so that the user equipment performs channel measurement according to the measurement configuration and reports the measurement result;
  • the base station After receiving the measurement result reported by the user equipment, the base station determines, according to the measurement result and the predetermined policy, whether to select the D2D link that the user equipment is using as another D2D link, or determines whether the D2D link that the user equipment is using is determined. Selected as a cellular link.
  • a user equipment includes: a first measurement unit that measures a D2D currently being used when the user equipment performs D2D communication with the peer device. Channel quality of the link;
  • a second measurement unit when the channel quality is less than a preset first threshold, and the base station configures a candidate D2D link for the user equipment, measuring channel quality of the candidate D2D link;
  • a sending unit configured to send a measurement result to the base station according to a predetermined policy, so that the base station is the user equipment according to the Select the communication link.
  • a base station includes: a configuration unit that performs measurement configuration on a user equipment, so that the user equipment performs channel measurement and reports measurement according to the measurement configuration.
  • a determining unit after receiving the measurement result reported by the user equipment, determining, according to the measurement result and the predetermined policy, whether to switch the D2D link that the user equipment is using to another D2D link, or determining whether the user equipment is being used.
  • the D2D link is selected as a cellular link.
  • a method for selecting a communication link includes:
  • the user equipment when performing cellular communication with the peer device, measures channel quality of the D2D link configured by the base station for the user equipment according to the measurement configuration of the base station;
  • the user equipment sends the measurement result of the D2D link to the base station, so that The base station accordingly selects a communication link for the user equipment.
  • a method for selecting a communication link includes:
  • the base station performs measurement configuration on the user equipment, so that the user equipment performs channel measurement according to the measurement configuration and reports the measurement result;
  • the base station After receiving the measurement result reported by the user equipment, the base station determines, according to the measurement result and the predetermined policy, whether to select the cellular link that the user equipment is using as the D2D link;
  • the measurement configuration includes: a measurement reporting trigger condition for performing a selection of a cellular link to a D2D link.
  • a user equipment includes: a measurement unit, when the user equipment performs cellular communication with a peer device, according to a trigger measurement of the base station Channel quality of the D2D link configured by the base station for the user equipment;
  • a determining unit determining whether the channel quality of the D2D link is less than a preset third threshold in a timing period of the preset third timer
  • a base station when the determining result of the determining unit is yes, transmitting, to the base station, a measurement result of the D2D link, so that the base station selects a communication link for the user equipment accordingly.
  • a base station includes: a configuration unit that performs measurement configuration for a user equipment, so that the user equipment performs channel measurement and reports measurement according to the measurement configuration. result;
  • a determining unit after receiving the measurement result reported by the user equipment, determining, according to the measurement result and a predetermined policy, whether to select a cellular link that the user equipment is using as the D2D link;
  • the measurement configuration includes: a measurement reporting trigger condition for performing a selection of a cellular link to a D2D link.
  • a communication system includes the user equipment of the third aspect and the base station of the fourth aspect, or the communication system includes the seventh aspect The user equipment and the base station of the eighth aspect.
  • a computer readable program wherein when the program is executed in a terminal device, the program causes the computer to perform the third aspect or the seventh aspect in the terminal device The method of selecting the communication link.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the communication link of the third aspect or the seventh aspect in the terminal device The choice method.
  • a computer readable program is provided, wherein, when the program is executed in a base station, the program causes the computer to perform the fourth aspect or the eighth aspect in the base station The method of selecting the communication link.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the communication chain of the fourth aspect or the eighth aspect in a base station The way to choose the road.
  • the beneficial effects of the embodiments of the present invention are as follows:
  • the method and apparatus of the embodiments of the present invention can reduce unnecessary UE measurement and reporting frequency, and save UE power and signaling overhead.
  • 1 is a schematic diagram of a scenario of direct communication in a D2D communication mode
  • FIG. 2 is a schematic diagram of a scenario of a local route in a D2D communication mode
  • FIG. 3 is a flowchart of a method for selecting a communication link according to Embodiment 1 of the present invention.
  • FIG. 4 is a flow diagram of one embodiment of a selection of communication links corresponding to the embodiment of FIG. 3.
  • FIG. 5 is a flow diagram of another embodiment of a selection of communication links corresponding to the embodiment of FIG. 3.
  • FIG. 7 is a schematic structural diagram of a user equipment according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic diagram showing the composition of a base station according to Embodiment 4 of the present invention.
  • FIG. 9 is a flowchart of a method of selecting a communication link according to Embodiment 5 of the present invention.
  • Figure 10 is a flowchart showing a method of selecting a communication link according to Embodiment 6 of the present invention.
  • FIG. 11 is a schematic structural diagram of a user equipment according to Embodiment 7 of the present invention.
  • Figure 12 is a diagram showing the composition of a base station according to Embodiment 8 of the present invention. detailed description
  • Embodiments of the present invention provide a method of selecting a communication link, which is a selection from a D2D link to other candidate D2D links or a cellular link.
  • Figure 3 is a flow chart of the method. Referring to Figure 3, the method includes:
  • Step 301 The user equipment measures channel quality of the currently used D2D link when performing D2D communication with the peer device.
  • the base station configures the user equipment to measure the channel quality of the D2D link being used on the fixed time-frequency resource.
  • Step 302 If the channel quality is less than a preset first threshold, and the base station configures a candidate D2D link for the user equipment, the user equipment measures channel quality of the candidate D2D link.
  • the base station pre-configures the first threshold for the user equipment, and the user equipment uses the first threshold as a basis for determining whether to measure other candidate D2D links.
  • Step 303 The user equipment sends a measurement result to the base station according to a predetermined policy, so that the base station selects a communication link for the user equipment accordingly.
  • the user equipment may directly send the measurement result or send the corresponding measurement result according to other policies, which will be specifically described below.
  • the base station configures, by the user equipment, the first threshold for performing the channel quality measurement of the candidate D2D link, and the user equipment performs the D2D communication process with the peer device according to the configuration of the base station.
  • the measurement of the D2D link being used if the channel quality of the D2D link it is using is lower than the first threshold, triggers the channel quality of the candidate D2D link for which the measurement base station is configured. This can reduce unnecessary UE measurements and save UE power.
  • the user equipment can simultaneously set a timer corresponding to the first threshold. During the timing of the timer, if the channel quality of the D2D link being used is always lower than the first threshold, the user equipment measures the network. The channel quality of the candidate D2D link is reported to the base station according to the relevant policy.
  • the user equipment may report the measurement result of the D2D link that is being used and the measurement result of the candidate D2D link to the base station, so that the base station determines whether to select the D2D link that the user equipment is using to select other candidate D2Ds. link. If the base station configures more than one candidate D2D link for the user equipment, the user equipment may measure the channel quality of all candidate D2D links when the D2D link that the user is currently using is lower than the first threshold, and according to The related policy reports the measurement result. The channel quality of only one or several candidate D2D links can be measured according to the predetermined policy, and the measurement result is reported according to the relevant policy.
  • the base station is configured with the measurement reporting triggering condition selected between the D2D links, and the triggering condition may include a partial bias, in addition to configuring the first threshold value for the user equipment.
  • the shift value and the corresponding timer (hereinafter referred to as the first timer). If the channel quality of the candidate D2D link obtained by the user equipment measurement is always higher than the channel quality of the currently used D2D link during the timing of the preset first timer, the preset offset value is That is, if there is a candidate D2D link available, the user equipment sends the measurement result of the candidate D2D link to the base station, so that the base station determines whether to select the D2D link currently used by the user equipment. On the candidate D2D link.
  • the user equipment may measure the channel quality of the multiple candidate D2D links one by one, and send the candidate D2D that satisfies the condition to the base station when one of the candidate D2D links satisfies the foregoing condition.
  • the measurement result of the link; the channel quality of all the candidate D2D links is also measured, and the measurement result of one of the candidate D2D links is reported, for example, the measurement result of the candidate D2D link with the best channel quality is reported, of course, this embodiment
  • the user equipment may also select a candidate D2D link that needs to report the measurement result according to other policies.
  • FIG. 4 is a flow chart showing a method of selecting a communication link according to an embodiment. Referring to FIG. 4, the flow includes:
  • Step 401 The UE measures channel quality of the D2D link currently being used
  • Step 402 The UE determines whether the channel quality of the currently used D2D link is lower than a preset first threshold, and if yes, step 403 is performed; otherwise, returns to step 401;
  • Step 403 The UE determines whether there is a candidate D2D link, and if yes, performs step 404, otherwise ends;
  • Step 404 The UE measures channel quality of the candidate D2D link.
  • Step 405 The UE determines whether the channel quality of the candidate D2D link is better than a channel offset of the currently used D2D link by a preset offset value. If yes, step 406 is performed; otherwise, return to step 403; Returning to step 403 may be to determine whether there is a next candidate D2D link, or not The limitation is to continue to determine whether there is a candidate D2D link, that is, to continue measuring the channel quality of the candidate D2D link.
  • Step 406 Determine whether the channel quality of the candidate D2D link is always better than a channel offset of the currently used D2D link when the first timer is running. If yes, perform the step. 407, otherwise return to step 404;
  • Step 407 When the first timer expires, the measurement result of the candidate D2D link is reported.
  • the first threshold, the offset value, and the first timer may be configured by the base station according to an empirical value, and the embodiment is not limited thereto.
  • the configuration of the offset value in the present embodiment can reduce the overhead of the UE measurement reporting.
  • the configuration of the first timer in this embodiment can enhance the accuracy of the reported information, and the base station can use the information as the slave D2D link.
  • the decision basis to other D2D links ultimately makes the UE's communication more stable.
  • the base station configures, for the user equipment, the selected measurement reporting trigger condition of the D2D link to the cellular link, in addition to configuring the first threshold for the user equipment, the trigger condition.
  • Another threshold value hereinafter referred to as a second threshold
  • a corresponding timer hereinafter referred to as a second timer
  • the user equipment sends the measurement results of all D2D links to the base station, including the measurement results of the currently used D2D link and the measurement results of the candidate D2D links.
  • the base station determines whether to select the D2D link currently being used by the user equipment onto the cellular link.
  • the user equipment needs to measure the channel quality of each D2D link (including the currently used D2D link and all candidate D2D links), and is currently using the D2D link.
  • the above measurement result is transmitted to the base station.
  • FIG. 5 is a flowchart of a method for selecting a communication link according to an embodiment. Referring to FIG. 5, the flow includes:
  • Step 501 The UE measures channel quality of the D2D link currently being used;
  • Step 502 The UE determines whether the channel quality of the currently used D2D link is lower than a preset first threshold. If yes, step 503 is performed; otherwise, returns to step 501;
  • Step 503 The UE determines whether there is a candidate D2D link, and if yes, performs step 504, otherwise ends;
  • Step 504 The UE measures channel quality of the candidate D2D link.
  • Step 505 The UE determines whether the channel quality of all the D2D links is less than a preset second threshold, and if yes, performs step 506, otherwise ends;
  • Step 506 Determine whether the D2D link quality is always lower than the second threshold when the second timer is running, if yes, go to step 507, otherwise go back to step 504;
  • Step 507 When the second timer expires, the measurement result of all D2D links is reported.
  • the first threshold, the second threshold, and the second timer may be configured by the base station according to an empirical value, and the embodiment is not limited thereto.
  • the configuration of the second threshold in this embodiment can reduce the overhead of measurement reporting by the UE.
  • the configuration of the second timer in this embodiment can enhance the accuracy of the reported information, and the base station can use the information as a slave D2D link.
  • the decision basis to other D2D links ultimately makes the UE's communication more stable.
  • the base station configures the first threshold for the user equipment, the measurement reporting trigger condition selected between the D2D links, and the selected measurement reporting trigger condition of the D2D link to the cellular link. .
  • the user equipment may first determine whether the first threshold is met, and then determine whether the two trigger conditions are respectively satisfied, and perform reporting of the corresponding measurement result when each of them meets. That is to say, in this embodiment, the above two triggering conditions are executed in parallel, and there is no direct relationship between them, but each of them is judged to be reported separately.
  • the user equipment may first determine whether the first threshold is met, and determine whether the measurement reporting trigger condition selected between the D2D links is satisfied. If the D2D chain is not satisfied, determine whether the D2D chain is satisfied. The trigger condition for the selection of the way to the cellular link, when satisfied, the reporting of the corresponding measurement result. That is to say, in this embodiment, the above two triggering conditions are sequential, and it is determined whether the latter triggering condition is satisfied when the previous triggering condition is not satisfied. Thus, the user equipment can proceed first The selection between the D2D links then selects the D2D link to the cellular link.
  • the user equipment may first determine whether the first threshold is met, and determine whether the trigger condition of the selection of the D2D link to the cellular link is met. If the content is not met, determine whether the above condition is met. The measurement of the selected D2D link is reported as a trigger condition. When it is satisfied, the corresponding measurement result is reported. That is to say, in this embodiment, the two triggering conditions are sequential, and it is determined whether the latter triggering condition is satisfied when the previous triggering condition is not satisfied. Thus, the user equipment can first select the D2D link to the cellular link and then select between the D2D links.
  • the UE when the channel quality of the D2D link that the user equipment is using is lower than the first threshold, the UE starts the measurement of the channel quality of the other candidate D2D links, thereby reducing the unnecessary UE. Measurement, saving UE power.
  • the overhead of the UE measurement reporting can be reduced, and the corresponding first timer and the second timer can be used to enhance the accuracy of the reported information, and the base station can use the information as a D2D link to other The decision basis of the candidate D2D link or the cellular link ultimately makes the UE communication more stable.
  • the embodiment of the present invention further provides a method for selecting a communication link, which is a processing on the base station side corresponding to the method in Embodiment 1, and details are not described herein again.
  • Figure 6 is a flow chart of the method, please refer to Figure 6, the method includes:
  • Step 601 The base station performs measurement configuration on the user equipment, so that the user equipment performs channel measurement according to the measurement configuration and reports the measurement result.
  • the foregoing measurement configuration may be that the base station is pre-configured for each user equipment by using the high layer signaling, and the embodiment of the present invention is not limited thereto.
  • Step 602 After receiving the measurement result reported by the user equipment, the base station determines, according to the measurement result and the predetermined policy, whether to select the D2D link that the user equipment is using as another D2D link, or whether the user equipment is being used.
  • the D2D link is selected as a cellular link.
  • the base station receives the measurement result reported by the user equipment, and may select a communication link for the user equipment according to its own load or other policies. For example, after receiving the measurement result of the candidate D2D link, the base station directly performs the selection between the D2D links; after receiving the measurement results of all the D2D links, determines whether to perform the D2D link to the cellular link according to the load of the D2D link. select.
  • the measurement configuration may include any combination of the following: a first threshold for performing candidate D2D link measurement; a measurement reporting trigger condition for performing D2D link selection; and, A measurement reporting trigger condition is performed for the selection of the D2D link to the cellular link.
  • the first threshold is used to indicate that the user equipment measures the channel quality of the configured candidate D2D link when the measured channel quality of the currently used D2D link is less than the first threshold.
  • the measurement reporting triggering condition for performing the D2D inter-link selection includes: an offset value and a corresponding timer, where the measurement reporting triggering condition for performing D2D inter-link selection is used to indicate the user equipment If the channel quality of the candidate D2D link obtained by the measurement is better than the channel quality of the currently used D2D link during the time period of the timer, when the timer expires, the report is reported. The measurement result of the candidate D2D link.
  • the measurement reporting triggering condition for performing the selection of the D2D link to the cellular link includes: a second threshold and a corresponding timer, where the measurement reporting trigger for performing the D2D link to the selection of the cellular link
  • the condition is used to indicate that the user equipment reports all D2D links when the timer expires, if the channel quality of all the D2D links obtained by the measurement is less than the second threshold. Measurement results.
  • the first threshold, the offset value, the corresponding timer, the second threshold, and the corresponding timer may be configured by the base station according to the empirical value, and the embodiment is not limited thereto.
  • the above three measurement configurations may be used separately or in combination, and the embodiment is not limited thereto.
  • the base station first performs the foregoing measurement configuration on the UE, and the UE determines whether the first threshold is met according to the measurement of the channel quality of the D2D link being used, according to the measurement of the channel quality of the candidate D2D link. Determining whether the above two measurement reporting trigger conditions are met, and reporting the corresponding measurement result according to the judgment result, for example: if the measurement reporting trigger condition selected between the D2D links is satisfied, reporting the measurement result of the candidate D2D link; if the D2D chain is satisfied The measurement result of the selected measurement of the path to the cellular link reports the measurement result of all D2D links. As a result, unnecessary UE measurement can be reduced, UE power can be saved, the overhead of UE measurement reporting can be reduced, and the stability of UE communication can be improved.
  • the embodiment of the present invention further provides a user equipment, as described in the following embodiment 3.
  • the principle of the user equipment is similar to that of the first embodiment. Therefore, the specific implementation may refer to the method of the first embodiment. Implementation, repetition will not be repeated.
  • FIG. 7 is a schematic diagram of the composition of the user equipment.
  • the user equipment includes:
  • a first measuring unit 71 which measures channel quality of a D2D link currently being used when the user equipment performs D2D communication with the peer device;
  • a second measuring unit 72 when the channel quality of the currently used D2D link is less than a preset first threshold, and the base station configures a candidate D2D link for the user equipment, measuring the candidate D2D chain Channel quality of the road;
  • the transmitting unit 73 transmits a measurement result to the base station according to a predetermined policy, so that the base station selects a communication link for the user equipment accordingly.
  • the sending unit 73 includes:
  • a first determining module 731 determining whether the channel quality of the candidate D2D link is always higher than a channel quality of the currently used D2D link in a timing time of the preset first timer Fixed offset value;
  • a first sending module 732 when the determining result of the first determining module 731 is YES, transmitting, to the base station, a measurement result of the candidate D2D link, so that the base station determines whether the user equipment is to be determined according to the The D2D link currently being used is selected onto the candidate D2D link.
  • the first sending module 732 sends the measurement result of the candidate D2D link that satisfies the condition to the base station when one of the candidate D2D links satisfies the above condition.
  • the sending unit 73 includes:
  • a second determining module 733 determining whether the channel quality of the currently used D2D link and the channel quality of the candidate D2D link are less than a preset time in a preset time period of the second timer Second threshold
  • a second sending module 734 when the determination result of the second determining module 733 is YES, transmitting, to the base station, measurement results of all D2D links, so that the base station determines whether the user equipment is currently being determined according to the The D2D link used is selected on the cellular link.
  • the second sending module 734 sends the measurement result to the base station when the D2D link and all candidate D2D links currently being used satisfy the above conditions.
  • the first threshold, the offset value, and a corresponding timer, the second threshold, and a corresponding timing may be pre-configured by the base station according to the experience value or sent by using the signaling, and the embodiment of the present invention is not limited thereto.
  • the user equipment of the embodiment performs the measurement of the corresponding communication link and the reporting result according to the measurement configuration performed by the base station, which saves the reporting overhead and power, and ensures the stability of the communication.
  • the embodiment of the present invention further provides a base station, as described in Embodiment 4 below. Since the principle of solving the problem is similar to the method of Embodiment 2, the specific implementation may refer to the implementation of the method of Embodiment 2. The repetitions are not repeated here.
  • FIG. 8 is a schematic diagram of the composition of the base station.
  • the base station includes:
  • the configuration unit 81 is configured to perform measurement on the user equipment, so that the user equipment performs channel measurement according to the measurement configuration and reports the measurement result;
  • a determining unit 82 after receiving the measurement result reported by the user equipment, determining, according to the measurement result and the predetermined policy, whether to select a D2D link that the user equipment is using to select another D2D link, or determining whether the user equipment is being used.
  • the D2D link is selected to the cellular link.
  • the measurement configuration performed by the configuration unit on the user equipment includes any combination of the following: a first threshold for performing candidate D2D link measurement; a measurement reporting trigger condition for performing D2D link selection; The triggering condition is reported for the measurement of the selection of the D2D link to the cellular link.
  • the first threshold is used to indicate that the user equipment measures the channel quality of the configured candidate D2D link when the measured channel quality of the currently used D2D link is less than the first threshold.
  • the measurement reporting triggering condition for performing the D2D inter-link selection is: an offset value and a corresponding timer, where the measurement reporting triggering condition for performing D2D inter-link selection is used to indicate the user equipment If the measured channel quality of the candidate D2D link is better than the channel quality of the currently used D2D link during the time period of the timer, when the timer expires, the reporting station The measurement result of the candidate D2D link.
  • the measurement reporting triggering condition for performing the selection of the D2D link to the cellular link is: a second threshold and a corresponding timer, where the measurement reporting trigger for performing the D2D link to the selection of the cellular link
  • the condition is used to indicate that the user equipment reports all D2D chains when the timer expires, if the channel quality of all D2D links obtained by the measurement is less than the second threshold. Road Measurement results.
  • the base station of the embodiment performs the measurement configuration for the user equipment, so that the user equipment performs the measurement of the corresponding communication link and reports the measurement result according to the measurement configuration performed by the base station, thereby saving the UE reporting overhead and power, and ensuring the UE communication. Stability.
  • the embodiment of the present invention further provides a method for selecting a communication link. Unlike the method or apparatus of the foregoing embodiment, this embodiment is not a selection from a D2D link to other candidate D2D links or a cellular link. It is the choice from cellular link to D2D link.
  • FIG. 9 is a flowchart of the method. Referring to FIG. 9, the method includes: Step 901: When performing cellular communication with a peer device, the user equipment measures the D2D link configured by the base station according to the measurement configuration of the base station. Channel quality;
  • the base station configures UE1 and UE2 to perform cellular communication, whereby UE1 and UE2 perform cellular communication under the coverage of the base station.
  • the base station may trigger the UE to perform D2D measurement, for example, the load ratio of the cellular communication is heavy, and the UE performs the measurement of the channel quality of the D2D link according to the trigger of the base station.
  • Step 902 If the channel quality of the D2D link is greater than a preset third threshold in a time period of a preset timer (hereinafter referred to as a third timer), then the third timer Upon expiration, the user equipment sends the measurement result of the D2D link to the base station, so that the base station selects a communication link for the user equipment accordingly.
  • a third timer a preset third threshold in a time period of a preset timer
  • the base station pre-configures, for the user equipment, a measurement reporting trigger condition from the cellular link to the D2D link, where the trigger condition includes the foregoing third threshold and a corresponding timer (ie, a third timer), when the user
  • the device detects, according to the measurement result of step 901, that the trigger condition is met, that is, the measurement result of the D2D link is sent to the base station, so that the base station selects a communication link for the user equipment, for example, performs mode selection of the cellular communication to the D2D communication.
  • the base station may determine the selection of the foregoing communication link according to other predetermined policies, which is not limited by this embodiment.
  • the method of the embodiment can reduce the overhead of the UE measurement reporting, and the configuration of the corresponding third timer can enhance the accuracy of the reported information, and the base station can use the information as a decision basis for selecting from the cellular communication to the D2D communication mode. Ultimately, UE communication is more stable.
  • Example 6 The embodiment of the present invention further provides a method for selecting a communication link, which is a process of the base station side corresponding to the method of Embodiment 5, and the description of the same contents is not repeated.
  • Figure 10 is a flow chart of the method. Referring to Figure 10, the method includes:
  • Step 1001 The base station performs measurement configuration for the user equipment, so that the user equipment performs channel measurement according to the measurement configuration and reports the measurement result.
  • the measurement configuration includes: a measurement reporting trigger condition for performing a selection of a cellular link to a D2D link.
  • Step 1002 After receiving the measurement result reported by the user equipment, the base station determines, according to the measurement result and the predetermined policy, whether to select the cellular link that the user equipment is using as the D2D link.
  • the measurement reporting triggering condition for performing the selection of the cellular link to the D2D link is: a third threshold and a corresponding timer, where the measurement reporting trigger for performing the selection of the cellular link to the D2D link.
  • the condition is used to indicate that the user equipment reports the D2D chain when the third timer expires, if the measured channel quality of the D2D link is better than the third threshold. Road measurement results.
  • the method of the embodiment can reduce the overhead of the UE measurement reporting, and the configuration of the corresponding third timer can enhance the accuracy of the reported information, and the base station can use the information as a decision basis for selecting from the cellular communication to the D2D communication mode. Ultimately, UE communication is more stable.
  • the embodiment of the present invention further provides a user equipment, as described in Embodiment 7 below. Since the principle of the user equipment is similar to that of the embodiment 5, the specific implementation may refer to the method of Embodiment 5. Implementation, content is the same and will not be repeated.
  • FIG. 11 is a schematic diagram of the composition of the user equipment.
  • the user equipment includes:
  • a measuring unit 111 when the user equipment performs cellular communication with the peer device, according to the measurement configuration of the base station, measuring channel quality of the D2D link configured by the base station for the user equipment;
  • the determining unit 112 determines whether the channel quality of the D2D link is less than a preset third threshold in a timing time of a preset third timer;
  • the sending unit 113 when the determination result of the determining unit 112 is YES, when the third timer expires, sending the measurement result of the D2D link to the base station, so that the base station selects the communication chain for the user equipment accordingly. road.
  • the user equipment of this embodiment can reduce the overhead of measurement reporting, and the configuration of the corresponding third timer can enhance the accuracy of the reported information, and the base station can use the information as a decision basis for selecting from a cellular communication to a D2D communication mode. Eventually the communication of the user equipment is more stable.
  • the embodiment of the present invention further provides a base station, as described in Embodiment 8 below.
  • the principle of solving the problem is similar to the method of Embodiment 6. Therefore, the specific implementation may refer to the implementation of the method in Embodiment 6. The description of the content is not repeated.
  • the embodiment of the invention further provides a base station.
  • 12 is a schematic diagram of the composition of the base station. Referring to FIG. 12, the base station includes:
  • the configuration unit 121 is configured to perform measurement on the user equipment, so that the user equipment performs channel measurement according to the measurement configuration and reports the measurement result;
  • the measurement configuration includes: a measurement reporting trigger condition for performing a selection of a cellular link to a D2D link.
  • the determining unit 122 after receiving the measurement result reported by the user equipment, determines whether to select the cellular link that the user equipment is using as the D2D link according to the measurement result and the predetermined policy.
  • the measurement reporting triggering condition for performing the selection of the cellular link to the D2D link is: a third threshold and a corresponding timer, where the measurement reporting trigger for performing the selection of the cellular link to the D2D link.
  • the condition is used to indicate that the user equipment reports the D2D chain when the third timer expires, if the measured channel quality of the D2D link is better than the third threshold. Road measurement results.
  • the base station of the embodiment can reduce the overhead of the UE measurement reporting, and the configuration of the corresponding third timer can enhance the accuracy of the reported information, and the base station can use the information as a decision basis for selecting from the cellular communication to the D2D communication mode. Ultimately, UE communication is more stable.
  • the embodiment of the present invention further provides a communication system, where the communication system includes the user equipment described in Embodiment 3 and the base station described in Embodiment 4, or the communication system includes the user equipment described in Embodiment 7. And the base station described in Embodiment 8.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a terminal device, the program causes the computer to execute the selection method of the communication link described in Embodiments 1 and 5 in the terminal device .
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the selection method of the communication link described in Embodiments 1 and 5 in the terminal device.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the selection method of the communication link described in Embodiments 2 and 6 in the base station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the selection method of the communication link described in Embodiments 2 and 6 in the base station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

Abstract

本发明实施例提供了一种通信链路的选择方法,其中,所述方法包括:用户设备在与对端设备进行D2D通信时,测量当前正在使用的D2D链路的信道质量;如果所述信道质量小于预先设定的第一阈值,且基站为所述用户设备配置了候选D2D链路,则所述用户设备测量所述候选D2D链路的信道质量;所述用户设备根据预定策略向基站发送测量结果,以便基站据此为所述用户设备选择通信链路。通过本发明实施例的方法和装置,可以减少无谓的UE测量及上报频率,节省UE功率及信令开销。

Description

通信链路的选择方法和装置 技术领域
本发明涉及通信系统, 尤其涉及一种在 D2D (Device to Device, 设备对设备) 通信方式下的通信链路的选择方法和装置。 背景技术
在现有的蜂窝无线通信系统中, 用户 (UE, User Equipment)与对端的用户进行 通信时,无论对端用户在什么位置,用户都需要把发送给对端用户的数据发送到基站, 然后经由核心网,再由给对端用户服务的基站将数据发送给对端用户;反之,类似的, 对端用户发送过来的数据, 也要经过 "基站-核心网-基站" 的路径发送过来, 最后由 用户通过空口接收。这样, 就会出现这样一种情况: 两个互相交流数据的用户位于非 常近的位置, 比如在相邻基站下或同一个基站下, 但是, 由于现有无线通信方式的限 制, 他们之间交流的数据还是要通过 "基站-核心网-基站" 的方式交流。 显然, 在两 个对端用户距离非常近的情况下, 这种交流方式既加重了核心网的负担, 又消耗了终 端过多能量, 因为在这种情况下, 终端与基站之间的距离往往超过两个终端之间的距 离, 因此终端需要更多的能量来发射数据。 因此, 在这种情况下, 距离非常近的两个 用户可以采用 D2D通信的方式,即通过两个终端之间的 D2D链路直接进行数据的发 送和接收, 如图 1和图 2所示。
目前, 通过发现 (Discovery)机制, UE1和 UE2会上报与自身可进行 D2D通信的 潜在 UE。根据上报结果,当网络侧了解到 UE1和 UE2之间的信道条件适合采用 D2D 方式的通信时, 基站可以配置 UE1和 UE2进行直接的数据传输, 无需通过核心网。 当然, 支持 D2D通信的控制信令依然由 eNB发送。
目前, UE1和 UE2之间的 D2D通信方式主要有直接通信 (Direct Mode, 见图 1) 和本地路由 (Locally Routed, 见图 2)两种方式。其中, 蜂窝链路 (cellular link)是指用户 面数据都通过核心网传输的通信方式。
发明人在实现本发明的过程中发现,一方面,对于两个正在进行 D2D通信的 UE1 和 UE2, 当 D2D链路的信道质量变差时, 有必要选择到蜂窝通信方式; 另一方面, 对于两个正在进行蜂窝通信的 UE1和 UE2, 当蜂窝通信的负载比较重时, 有必要选 择到 D2D通信方式。 而现有机制并未对上述情况给出解决方案。
应该注意, 上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明, 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。 发明内容
本发明实施例的目的在于提供一种通信链路的选择方法和装置, 以减少无谓的 UE测量及上报频率, 节省 UE功率及信令开销。
根据本发明实施例的第一方面, 提供了一种通信链路的选择方法, 其中, 所述方 法包括:
用户设备在与对端设备进行 D2D通信时, 测量当前正在使用的 D2D链路的信道 质量;
如果所述信道质量小于预先设定的第一阈值, 且基站为所述用户设备配置了候选 D2D链路, 则所述用户设备测量所述候选 D2D链路的信道质量;
所述用户设备根据预定策略向基站发送测量结果, 以便基站据此为所述用户设备 选择通信链路。
根据本发明实施例的第二方面, 提供了一种通信链路的选择方法, 其中, 所述方 法包括:
基站对用户设备进行测量配置, 以便所述用户设备根据所述测量配置进行信道测 量并上报测量结果;
基站在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定策略确定 是否将用户设备正在使用的 D2D链路选择为其他 D2D链路,或者确定是否将用户设 备正在使用的 D2D链路选择为蜂窝链路。
根据本发明实施例的第三方面,提供了一种用户设备,其中,所述用户设备包括: 第一测量单元, 其在用户设备在与对端设备进行 D2D通信时, 测量当前正在使 用的 D2D链路的信道质量;
第二测量单元, 其在所述信道质量小于预先设定的第一阈值, 且基站为所述用户 设备配置了候选 D2D链路时, 测量所述候选 D2D链路的信道质量;
发送单元, 其根据预定策略向基站发送测量结果, 以便基站据此为所述用户设备 选择通信链路。
根据本发明实施例的第四方面, 提供了一种基站, 其中, 所述基站包括: 配置单元, 其对用户设备进行测量配置, 以便所述用户设备根据所述测量配置进 行信道测量并上报测量结果;
确定单元, 其在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定 策略确定是否将用户设备正在使用的 D2D链路切换为其他 D2D链路,或者确定是否 将用户设备正在使用的 D2D链路选择为蜂窝链路。
根据本发明实施例的第五方面, 提供了一种通信链路的选择方法, 其中, 所述方 法包括:
用户设备在与对端设备进行蜂窝通信时, 根据基站的测量配置, 测量所述基站为 所述用户设备配置的 D2D链路的信道质量;
如果在预先设定的第三计时器的计时时间内, 所述 D2D链路的信道质量小于预 先设定的第三阈值, 则所述用户设备向基站发送所述 D2D链路的测量结果, 以便基 站据此为所述用户设备选择通信链路。
根据本发明实施例的第六方面, 提供了一种通信链路的选择方法, 其中, 所述方 法包括:
基站为用户设备进行测量配置, 以便所述用户设备根据所述测量配置进行信道测 量并上报测量结果;
基站在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定策略确定 是否将用户设备正在使用的蜂窝链路选择为所述 D2D链路;
其中, 所述测量配置包括: 用于进行蜂窝链路到 D2D链路的选择的测量上报触 发条件。
根据本发明实施例的第七方面,提供了一种用户设备,其中,所述用户设备包括: 测量单元, 其在所述用户设备与对端设备进行蜂窝通信时, 根据基站的触发测量 所述基站为所述用户设备配置的 D2D链路的信道质量;
判断单元, 其判断在预先设定的第三计时器的计时时间内, 所述 D2D链路的信 道质量是否小于预先设定的第三阈值;
发送单元, 其在所述判断单元的判断结果为是时, 向基站发送所述 D2D链路的 测量结果, 以便基站据此为所述用户设备选择通信链路。 根据本发明实施例的第八方面, 提供了一种基站, 其中, 所述基站包括: 配置单元, 其为用户设备进行测量配置, 以便所述用户设备根据所述测量配置进 行信道测量并上报测量结果;
确定单元, 其在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定 策略确定是否将用户设备正在使用的蜂窝链路选择为所述 D2D链路;
其中, 所述测量配置包括: 用于进行蜂窝链路到 D2D链路的选择的测量上报触 发条件。
根据本发明实施例的第九方面, 提供了一种通信系统, 其中, 所述通信系统包括 第三方面所述的用户设备和第四方面所述的基站,或者所述通信系统包括第七方面所 述的用户设备和第八方面所述的基站。
根据本发明实施例的第九方面, 提供了一种计算机可读程序, 其中当在终端设备 中执行该程序时,该程序使得计算机在所述终端设备中执行第三方面或第七方面所述 的通信链路的选择方法。
根据本发明实施例的第十方面, 提供了一种存储有计算机可读程序的存储介质, 其中该计算机可读程序使得计算机在终端设备中执行第三方面或第七方面所述的通 信链路的选择方法。
根据本发明实施例的第十一方面, 提供了一种计算机可读程序, 其中, 当在基站 中执行该程序时,该程序使得计算机在所述基站中执行第四方面或第八方面所述的通 信链路的选择方法。
根据本发明实施例的第十二方面, 提供了一种存储有计算机可读程序的存储介 质,其中, 该计算机可读程序使得计算机在基站中执行第四方面或第八方面所述的通 信链路的选择方法。
本发明实施例的有益效果在于: 通过本发明实施例的方法和装置, 可以减少无谓 的 UE测量及上报频率, 节省 UE功率及信令开销。
参照后文的说明和附图,详细公开了本发明的特定实施方式, 指明了本发明的原 理可以被采用的方式。应该理解, 本发明的实施方式在范围上并不因而受到限制。在 所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用, 与其它实施方式中的特征相组合, 或替代其它实施方式中的 特征。
应该强调, 术语"包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在, 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘 制的, 而只是为了示出本发明的原理。 为了便于示出和描述本发明的一些部分, 附图 中对应部分可能被放大或缩小。在本发明的一个附图或一种实施方式中描述的元素和 特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外,在 附图中, 类似的标号表示几个附图中对应的部件, 并可用于指示多于一种实施方式中 使用的对应部件。 在附图中:
图 1是 D2D通信方式中直接通信的场景示意图;
图 2是 D2D通信方式中本地路由的场景示意图;
图 3是本发明实施例 1的通信链路的选择方法的流程图;
图 4是对应图 3的实施例的通信链路的选择的一个实施方式的流程图; 图 5是对应图 3的实施例的通信链路的选择的另外一个实施方式的流程图; 图 6是本发明实施例 2的通信链路的选择方法的流程图;
图 7是本发明实施例 3的用户设备的组成示意图;
图 8是本发明实施例 4的基站的组成示意图;
图 9是本发明实施例 5的通信链路的选择方法的流程图;
图 10是本发明实施例 6的通信链路的选择方法的流程图;
图 11是本发明实施例 7的用户设备的组成示意图;
图 12是本发明实施例 8的基站的组成示意图。 具体实施方式
参照附图, 通过下面的说明书, 本发明实施例的前述以及其它特征将变得明显。 这些实施方式只是示例性的, 不是对本发明的限制。为了使本领域的技术人员能够容 易地理解本发明的原理和实施方式, 本发明的实施方式以 UE1 (用户 1 )和 UE2 (用 户 2) 都在同一个 eNB (在以下的说明中, 称为基站) 的覆盖下进行 D2D通信或者 蜂窝通信为例,对本发明实施例的通信链路的选择方法和装置进行说明,但可以理解, 本发明实施例并不限于上述场景, 对于涉及通信链路选择的其他场景均适用。
实施例 1
本发明实施例提供了一种通信链路的选择方法, 该方法是从 D2D链路到其他候 选 D2D链路或者蜂窝链路的选择。 图 3是该方法的流程图, 请参照图 3, 该方法包 括:
步骤 301 : 用户设备在与对端设备进行 D2D通信时, 测量当前正在使用的 D2D 链路的信道质量;
其中, 基站会配置用户设备在固定时频资源上测量正在使用的 D2D链路的信道 质量。
步骤 302: 如果所述信道质量小于预先设定的第一阈值, 且基站为所述用户设备 配置了候选 D2D链路, 则所述用户设备测量所述候选 D2D链路的信道质量;
其中, 基站为所述用户设备预先配置了上述第一阈值, 该用户设备以该第一阈值 作为是否测量其他候选 D2D链路的判断依据。
步骤 303: 所述用户设备根据预定策略向基站发送测量结果, 以便基站据此为所 述用户设备选择通信链路。
其中,用户设备可以直接发送测量结果,或者根据其他策略发送相应的测量结果, 具体将在以下进行详细说明。
在本实施例的一个实施方式中, 基站为用户设备配置了上述进行候选 D2D链路 的信道质量测量的第一阈值, 用户设备在与对端设备进行 D2D通信过程中, 会按照 基站的配置对正在使用的 D2D链路的进行测量,如果其正在使用的 D2D链路的信道 质量低于上述第一阈值, 则触发测量基站为其配置的候选 D2D链路的信道质量。 由 此可以减少无谓的 UE测量, 节省 UE功率。
其中, 用户设备可以同时设置一个对应该第一阈值的计时器, 在该计时器的计时 时间内, 如果正在使用的 D2D链路的信道质量始终低于上述第一阈值, 则用户设备 才去测量候选 D2D链路的信道质量, 并根据相关策略向基站上报上述测量结果。
其中, 用户设备可以将测量获得的正在使用的 D2D链路的测量结果和候选 D2D 链路的测量结果都上报给基站, 以便基站决定是否将该用户设备正在使用的 D2D链 路选择到其他候选 D2D链路。 其中, 如果基站为该用户设备配置了不止一个候选 D2D链路, 则用户设备在其 当前正在使用的 D2D链路低于上述第一阈值时,可以测量所有候选 D2D链路的信道 质量, 并根据相关策略上报测量结果; 也可以按照预定策略只测量某一个或者某几个 候选 D2D链路的信道质量, 并根据相关策略上报测量结果。
在本实施例的另外一个实施方式中, 基站除了为用户设备配置了上述第一阈值以 夕卜, 还为用户设备配置了 D2D链路间选择的测量上报触发条件, 该触发条件可以包 括一个偏移值和相应的计时器 (以下称为第一计时器)。 如果在该预先设定的第一计 时器的计时时间内, 用户设备测量获得的候选 D2D链路的信道质量始终高于当前正 在使用的 D2D链路的信道质量一个该预先设定的偏移值, 也就是说, 有可用的候选 D2D链路, 则用户设备向所述基站发送该候选 D2D链路的测量结果, 以便基站据此 确定是否将该用户设备当前正在使用的 D2D链路选择到该候选 D2D链路上。
其中, 如果候选 D2D链路为多个, 则用户设备可以逐一测量该多个候选 D2D链 路的信道质量, 并在其中一个候选 D2D链路满足上述条件时, 向基站发送该满足条 件的候选 D2D链路的测量结果; 也可以测量所有候选 D2D链路的信道质量, 并上报 其中一个候选 D2D链路的测量结果,例如上报信道质量最好的候选 D2D链路的测量 结果, 当然本实施例并不以此作为限制, 该用户设备也可以根据其他策略选择需要上 报测量结果的候选 D2D链路。
为了更易于理解, 以下通过附图对本实施方式进行说明。
图 4是对应该实施方式的通信链路的选择方法的流程图, 请参照图 4, 该流程包 括:
步骤 401 : UE测量当前正在使用的 D2D链路的信道质量;
步骤 402: UE判断当前正在使用的 D2D链路的信道质量是否低于预先设定的第 一阈值, 如果是, 则执行步骤 403, 否则返回步骤 401 ;
步骤 403: UE判断是否有候选的 D2D链路, 如果有, 则执行步骤 404, 否则结 束;
步骤 404: UE测量候选 D2D链路的信道质量;
步骤 405: UE判断所述候选 D2D链路的信道质量是否好于当前正在使用的 D2D 链路的信道质量一个预先设定的偏移值,如果是,则执行步骤 406,否则返回步骤 403; 其中, 返回步骤 403可以是判断是否还有下一个候选 D2D链路, 也可以没有这 个限制, 而是继续判断是否有候选 D2D链路, 也即继续测量该候选 D2D链路的信道 质量。
步骤 406: 判断在该第一计时器运行时, 该候选 D2D链路的信道质量是否一直好 于当前正在使用的 D2D链路的信道质量一个预先设定的偏移值, 如果是, 则执行步 骤 407, 否则返回步骤 404;
步骤 407: 当该第一计时器到期时, 上报候选 D2D链路的测量结果。
其中, 图 4所示的方法的各步骤的细节以及预先设定的第一阈值、 偏移值、 第一 计时器等内容, 已经在前面做了说明, 在此不再赘述。
其中, 上述第一阈值、 偏移值和第一计时器可以由基站根据经验值配置, 本实施 例并不以此作为限制。
通过本实施方式对偏移值的配置, 可以减少 UE测量上报的开销, 通过本实施方 式对第一计时器的配置,能够增强上报信息的准确性,基站可以将该信息用作从 D2D 链路到其他 D2D链路的判决依据, 最终使 UE的通信更具稳定性。
在本实施例的另外一个实施方式中, 基站除了为用户设备配置了上述第一阈值以 夕卜, 还为用户设备配置了 D2D链路到蜂窝链路的选择的测量上报触发条件, 该触发 条件可以包括另外一个门限值(以下称为第二阈值)和对应的计时器(以下称为第二 计时器)。 如果在该预先设定的第二计时器的计时时间内, 用户设备测量获得的当前 正在使用的 D2D链路的信道质量和候选 D2D链路的信道质量都小于该预先设定的第 二阈值, 也就是说, 所有 D2D链路的信道质量都不能满足要求, 则用户设备向基站 发送所有 D2D链路的测量结果,包括当前正在使用的 D2D链路的测量结果以及候选 D2D链路的测量结果, 以便基站据此确定是否将该用户设备当前正在使用的 D2D链 路选择到蜂窝链路上。
其中, 如果候选 D2D链路为多个, 则用户设备需要测量每一个 D2D链路的信道 质量 (包括当前正在使用的 D2D链路和所有候选 D2D链路), 并在当前正在使用的 D2D链路和所有候选 D2D链路都满足上述条件时, 向基站发送上述测量结果。
为了更易于理解, 以下通过附图对本实施方式进行说明。
图 5是对应该实施方式的通信链路的选择方法的流程图, 请参照图 5, 该流程包 括:
步骤 501 : UE测量当前正在使用的 D2D链路的信道质量; 步骤 502: UE判断当前正在使用的 D2D链路的信道质量是否低于预先设定的第 一阈值, 如果是, 则执行步骤 503, 否则返回步骤 501 ;
步骤 503: UE判断是否有候选的 D2D链路, 如果有, 则执行步骤 504, 否则结 束;
步骤 504: UE测量候选 D2D链路的信道质量;
步骤 505: UE判断是否所有 D2D链路的信道质量都小于一个预先设定的第二阈 值, 如果是, 则执行步骤 506, 否则结束;
步骤 506: 判断在该第二计时器运行时, 所有 D2D链路质量是否始终低于第二阈 值, 如果是, 则执行步骤 507, 否则返回步骤 504;
步骤 507: 当该第二计时器到期时, 上报所有 D2D链路的测量结果。
其中, 图 5所示的方法的各步骤的细节以及预先设定的第一阈值、 第二阈值、 第 二计时器等内容, 已经在前面做了说明, 在此不再赘述。
其中, 上述第一阈值、 第二阈值、 第二计时器可以由基站根据经验值配置, 本实 施例并不以此作为限制。
通过本实施方式对第二阈值的配置, 可以减少 UE测量上报的开销, 通过本实施 方式对第二计时器的配置, 能够增强上报信息的准确性, 基站可以将该信息用作从 D2D链路到其他 D2D链路的判决依据, 最终使 UE的通信更具稳定性。
在本实施例的另外一个实施方式中, 基站为用户设备配置了上述第一阈值, 上述 D2D链路间选择的测量上报触发条件, 以及上述 D2D链路到蜂窝链路的选择的测量 上报触发条件。
其中, 在一个实施方式中, 用户设备可以先判断是否满足上述第一阈值, 再分别 判断是否分别满足上述两个触发条件, 并在各自满足时进行相应的测量结果的上报。 也就是说, 在该实施方式中, 上述两个触发条件是并行执行的, 相互之间没有直接的 关系, 只是各自判断各自上报。
其中, 在另外一个实施方式中, 用户设备也可以先判断是否满足上述第一阈值, 再判断是否满足上述 D2D链路间选择的测量上报触发条件, 在不满足时, 再判断是 否满足上述 D2D链路到蜂窝链路的选择的触发条件, 在满足时, 进行相应的测量结 果的上报。 也就是说, 在该实施方式中, 上述两个触发条件是有先后顺序的, 在前一 个触发条件不满足时再判断是否满足后一个触发条件。 由此, 用户设备可以先进行 D2D链路间的选择再进行 D2D链路到蜂窝链路的选择。
其中, 在另外一个实施方式中, 用户设备也可以先判断是否满足上述第一阈值, 再判断是否满足上述 D2D链路到蜂窝链路的选择的触发条件, 在不满足时, 再判断 是否满足上述 D2D链路间选择的测量上报触发条件, 在满足时, 进行相应的测量结 果的上报。 也就是说, 在该实施方式中, 上述两个触发条件是有先后顺序的, 在前一 个触发条件不满足时再判断是否满足后一个触发条件。 由此, 用户设备可以先进行 D2D链路到蜂窝链路的选择再进行 D2D链路间的选择。
通过本发明实施例的方法, 当用户设备正在使用的 D2D链路的信道质量低于第 一阈值时, UE才启动对其他候选 D2D链路的信道质量的测量, 由此, 可减少无谓的 UE测量, 节省 UE功率。 另外, 通过上述两个触发条件, 可减少 UE测量上报的开 销,利用相应的第一计时器和第二计时器能增强上报信息的准确性,基站可将该信息 用做从 D2D链路到其他候选 D2D链路或蜂窝链路的判决依据, 最终使 UE通信更具 稳定性。
实施例 2
本发明实施例还提供了一种通信链路的选择方法, 该方法是与实施例 1的方法对 应的基站侧的处理, 内容重复之处不再赘述。 图 6是该方法的流程图, 请参照图 6, 该方法包括:
步骤 601 : 基站对用户设备进行测量配置, 以便所述用户设备根据所述测量配置 进行信道测量并上报测量结果;
其中, 上述测量配置可以是基站通过高层信令为各个用户设备预先配置的, 本发 明实施例并不以此作为限制。
其中, 测量配置的内容将在以下进行说明。
步骤 602: 基站在接收到用户设备上报的测量结果后, 根据所述测量结果以及预 定策略确定是否将用户设备正在使用的 D2D链路选择为其他 D2D链路,或者确定是 否将用户设备正在使用的 D2D链路选择为蜂窝链路。
其中, 基站在接收到用户设备上报的测量结果, 可以根据自身负载或其他策略为 该用户设备选择通信链路。 例如, 基站在接收到候选 D2D链路的测量结果后, 直接 执行 D2D链路间的选择; 在接收到所有 D2D链路的测量结果后, 根据自身负载决定 是否执行 D2D链路到蜂窝链路的选择。 在本发明实施例中, 所述测量配置可以包括以下内容的任意组合: 用于进行候选 D2D链路测量的第一阈值; 用于进行 D2D链路间选择的测量上报触发条件; 以及, 用于进行 D2D链路到蜂窝链路的选择的测量上报触发条件。
其中, 所述第一阈值用于指示所述用户设备, 在测量获得的当前正在使用的 D2D 链路的信道质量小于上述第一阈值时, 测量配置的候选 D2D链路的信道质量。
其中, 所述用于进行 D2D链路间选择的测量上报触发条件包括: 偏移值和对应 的计时器, 所述用于进行 D2D链路间选择的测量上报触发条件用于指示所述用户设 备, 在所述计时器的计时时间内, 如果测量获得的候选 D2D链路的信道质量比当前 正在使用的 D2D链路的信道质量好上述偏移值, 则当该计时器过期时, 上报所述候 选 D2D链路的测量结果。
其中, 所述用于进行 D2D链路到蜂窝链路的选择的测量上报触发条件包括: 第 二阈值和对应的计时器, 所述用于进行 D2D链路到蜂窝链路的选择的测量上报触发 条件用于指示所述用户设备,在所述计时器的计时时间内,如果测量获得的所有 D2D 链路的信道质量都小于上述第二阈值, 则当该计时器过期时, 上报所有 D2D链路的 测量结果。
其中, 上述第一阈值、 偏移值及对应的计时器、 第二阈值及对应的计时器可以由 基站根据经验值配置, 本实施例并不以此作为限制。
其中, 与实施例 1相同, 上述三种测量配置可以分开使用, 也可以结合使用, 本 实施例并不以此作为限制。
在本实施例中, 基站首先对 UE进行上述测量配置, UE根据对正在使用的 D2D 链路的信道质量的测量, 判断是否满足上述第一阈值, 根据对候选 D2D链路的信道 质量的测量,判断是否满足上述两个测量上报触发条件, 并根据判断结果上报相应的 测量结果, 例如: 如果满足 D2D链路间选择的测量上报触发条件, 则上报候选 D2D 链路的测量结果; 如果满足 D2D链路到蜂窝链路的选择的测量上报触发条件, 则上 报所有 D2D链路的测量结果。 由此, 可减少无谓的 UE测量, 节省 UE功率, 减少 UE测量上报的开销, 提高 UE通信的稳定性。
本发明实施例还提供了一种用户设备, 如下面的实施例 3所述, 由于该用户设备 解决问题的原理与实施例 1的方法类似,因此其具体的实施可以参照实施例 1的方法 的实施, 重复之处不再赘述。 实施例 3
本发明实施例还提供了一种用户设备。 图 7是该用户设备的组成示意图, 请参照 图 7, 该用户设备包括:
第一测量单元 71, 其在用户设备与对端设备进行 D2D通信时, 测量当前正在使 用的 D2D链路的信道质量;
第二测量单元 72, 其在所述当前正在使用的 D2D链路的信道质量小于预先设定 的第一阈值, 且基站为所述用户设备配置了候选 D2D链路时, 测量所述候选 D2D链 路的信道质量;
发送单元 73,其根据预定策略向基站发送测量结果, 以便基站据此为所述用户设 备选择通信链路。
在一个实施例中, 所述发送单元 73包括:
第一判断模块 731,其判断在预先设定的第一计时器的计时时间内,所述候选 D2D 链路的信道质量是否始终高于所述当前正在使用的 D2D链路的信道质量一个预先设 定的偏移值;
第一发送模块 732, 其在所述第一判断模块 731的判断结果为是时, 向所述基站 发送所述候选 D2D链路的测量结果, 以便所述基站据此确定是否将所述用户设备当 前正在使用的 D2D链路选择到所述候选 D2D链路上。
其中,如果候选 D2D链路为多个,则所述第一发送模块 732在其中一个候选 D2D 链路满足上述条件时, 向基站发送该满足条件的候选 D2D链路的测量结果。
在另外一个实施例中, 所述发送单元 73包括:
第二判断模块 733, 其判断在预先设定的第二计时器的计时时间内, 所述当前正 在使用的 D2D链路的信道质量和所述候选 D2D链路的信道质量是否都小于预先设定 的第二阈值;
第二发送模块 734, 其在所述第二判断模块 733的判断结果为是时, 向所述基站 发送所有 D2D链路的测量结果, 以便所述基站据此确定是否将所述用户设备当前正 在使用的 D2D链路选择到蜂窝链路上。
其中, 如果候选 D2D链路为多个, 则所述第二发送模块 734在当前正在使用的 D2D链路和所有候选 D2D链路都满足上述条件时, 向基站发送所述测量结果。
其中, 所述第一阈值、 所述偏移值及对应的计时器、 所述第二阈值及对应的计时 器可以是所述基站根据经验值为所述用户设备预先配置的或通过信令下发的,本发明 实施例并不以此作为限制。
通过本实施例的用户设备, 根据基站为其进行的测量配置进行相应的通信链路的 测量和测量结果的上报, 节省了上报开销和功率, 保证了通信的稳定性。
本发明实施例还提供了一种基站, 如下面的实施例 4所述, 由于该基站解决问题 的原理与实施例 2的方法类似, 因此其具体的实施可以参照实施例 2的方法的实施, 重复之处不再赘述。
实施例 4
本发明实施例提供了一种基站。 图 8是该基站的组成示意图, 请参照图 8, 该基 站包括:
配置单元 81,其对用户设备进行测量配置, 以便所述用户设备根据所述测量配置 进行信道测量并上报测量结果;
确定单元 82,其在接收到用户设备上报的测量结果后,根据所述测量结果以及预 定策略确定是否将用户设备正在使用的 D2D链路选择到其他 D2D链路,或者确定是 否将用户设备正在使用的 D2D链路选择到蜂窝链路。
其中, 所述配置单元对所述用户设备进行的测量配置包括以下内容的任意组合: 用于进行候选 D2D链路测量的第一阈值;用于进行 D2D链路间选择的测量上报触发 条件; 用于进行 D2D链路到蜂窝链路的选择的测量上报触发条件。
其中, 所述第一阈值用于指示所述用户设备, 在测量获得的当前正在使用的 D2D 链路的信道质量小于上述第一阈值时, 测量配置的候选 D2D链路的信道质量。
其中, 所述用于进行 D2D链路间选择的测量上报触发条件为: 偏移值和对应的 计时器,所述用于进行 D2D链路间选择的测量上报触发条件用于指示所述用户设备, 在所述计时器的计时时间内, 如果测量获得的候选 D2D链路的信道质量比当前正在 使用的 D2D链路的信道质量好上述偏移值, 则当所述计时器过期时, 上报所述候选 D2D链路的测量结果。
其中, 所述用于进行 D2D链路到蜂窝链路的选择的测量上报触发条件为: 第二 阈值和对应的计时器, 所述用于进行 D2D链路到蜂窝链路的选择的测量上报触发条 件用于指示所述用户设备, 在所述计时器的计时时间内, 如果测量获得的所有 D2D 链路的信道质量都小于上述第二阈值, 则当所述计时器过期时, 上报所有 D2D链路 的测量结果。
通过本实施例的基站为用户设备进行测量配置, 使得用户设备根据基站为其进行 的测量配置进行相应的通信链路的测量和测量结果的上报,节省了 UE上报开销和功 率, 保证了 UE通信的稳定性。
实施例 5
本发明实施例还提供了一种通信链路的选择方法, 与前述实施例的方法或装置不 同的是, 本实施例不是从 D2D链路到其他候选 D2D链路或者蜂窝链路的选择, 而是 从蜂窝链路到 D2D链路的选择。 图 9是该方法的流程图, 请参照图 9, 该方法包括: 步骤 901 : 用户设备在与对端设备进行蜂窝通信时, 根据基站的测量配置, 测量 所述基站为其配置的 D2D链路的信道质量;
其中, 基站配置 UE1和 UE2进行蜂窝通信, 由此, UE1和 UE2在基站的覆盖下 进行蜂窝通信。
其中, 在某些情况下, 基站可能触发 UE进行 D2D测量, 例如蜂窝通信的负载比 较重等, 由此 UE根据基站的触发进行 D2D链路的信道质量的测量。
步骤 902: 如果在预先设定的计时器 (以下称为第三计时器) 的计时时间内, 所 述 D2D链路的信道质量大于预先设定的第三阈值, 则当所述第三计时器过期时, 所 述用户设备向基站发送所述 D2D链路的测量结果, 以便基站据此为所述用户设备选 择通信链路。
其中, 基站预先为该用户设备配置了从蜂窝链路到 D2D链路的选择的测量上报 触发条件, 该触发条件包括前述第三阈值及对应的计时器 (即, 第三计时器), 当用 户设备根据步骤 901 的测量结果, 发现满足上述触发条件时, 即向基站发送该 D2D 链路的测量结果, 以便基站据此为用户设备选择通信链路, 例如, 执行蜂窝通信到 D2D通信的模式选择。
其中, 基站可以根据其他预定策略决定上述通信链路的选择, 本实施例并不以此 作为限制。
通过本实施例的方法, 可减少 UE测量上报的开销, 相应的第三计时器的配置能 增强上报信息的准确性, 基站可将该信息用做从蜂窝通信到 D2D通信模式选择的判 决依据, 最终使 UE通信更具稳定性。
实施例 6 本发明实施例还提供了一种通信链路的选择方法, 该方法是对应实施例 5的方法 的基站侧的处理, 内容相同之处不再重复说明。 图 10是该方法的流程图, 请参照图 10, 该方法包括:
步骤 1001 : 基站为用户设备进行测量配置, 以便所述用户设备根据所述测量配置 进行信道测量并上报测量结果;
其中, 所述测量配置包括: 用于进行蜂窝链路到 D2D链路的选择的测量上报触 发条件。
步骤 1002: 基站在接收到用户设备上报的测量结果后,根据所述测量结果以及预 定策略确定是否将用户设备正在使用的蜂窝链路选择为所述 D2D链路。
其中, 所述用于进行蜂窝链路到 D2D链路的选择的测量上报触发条件为: 第三 阈值和对应的计时器, 所述用于进行蜂窝链路到 D2D链路的选择的测量上报触发条 件用于指示所述用户设备, 在所述计时器的计时时间内, 如果测量获得的 D2D链路 的信道质量好于上述第三阈值, 则当第三计时器过期时, 上报所述 D2D链路的测量 结果。
通过本实施例的方法, 可减少 UE测量上报的开销, 相应的第三计时器的配置能 增强上报信息的准确性, 基站可将该信息用做从蜂窝通信到 D2D通信模式选择的判 决依据, 最终使 UE通信更具稳定性。
本发明实施例还提供了一种用户设备, 如下面的实施例 7所述, 由于该用户设备 解决问题的原理与实施例 5的方法类似,因此其具体的实施可以参照实施例 5的方法 的实施, 内容相同之处不再重复说明。
实施例 7
本发明实施例还提供了一种用户设备。 图 11 是该用户设备的组成示意图, 请参 照图 11, 该用户设备包括:
测量单元 111, 其在所述用户设备与对端设备进行蜂窝通信时, 根据基站的测量 配置, 测量所述基站为所述用户设备配置的 D2D链路的信道质量;
判断单元 112, 其判断在预先设定的第三计时器的计时时间内, 所述 D2D链路的 信道质量是否小于预先设定的第三阈值;
发送单元 113, 其在所述判断单元 112的判断结果为是时, 当第三计时器过期时, 向基站发送所述 D2D链路的测量结果,以便基站据此为所述用户设备选择通信链路。 通过本实施例的用户设备, 可减少测量上报的开销, 相应的第三计时器的配置能 增强上报信息的准确性, 基站可将该信息用做从蜂窝通信到 D2D通信模式选择的判 决依据, 最终使该用户设备的通信更具稳定性。
本发明实施例还提供了一种基站, 如下面的实施例 8所述, 由于该基站解决问题 的原理与实施例 6的方法类似, 因此其具体的实施可以参照实施例 6的方法的实施, 内容相同之处不再重复说明。
实施例 8
本发明实施例还提供了一种基站。 图 12是该基站的组成示意图, 请参照图 12, 该基站包括:
配置单元 121, 其为用户设备进行测量配置, 以便所述用户设备根据所述测量配 置进行信道测量并上报测量结果;
其中, 所述测量配置包括: 用于进行蜂窝链路到 D2D链路的选择的测量上报触 发条件。
确定单元 122, 其在接收到用户设备上报的测量结果后, 根据所述测量结果以及 预定策略确定是否将用户设备正在使用的蜂窝链路选择为所述 D2D链路。
其中, 所述用于进行蜂窝链路到 D2D链路的选择的测量上报触发条件为: 第三 阈值和对应的计时器, 所述用于进行蜂窝链路到 D2D链路的选择的测量上报触发条 件用于指示所述用户设备, 在所述计时器的计时时间内, 如果测量获得的 D2D链路 的信道质量好于上述第三阈值, 则当第三计时器过期时, 上报所述 D2D链路的测量 结果。
通过本实施例的基站, 可减少 UE测量上报的开销, 相应的第三计时器的配置能 增强上报信息的准确性, 基站可将该信息用做从蜂窝通信到 D2D通信模式选择的判 决依据, 最终使 UE通信更具稳定性。
本发明实施例还提供了一种通信系统, 其中, 所述通信系统包括实施例 3所述的 用户设备和实施例 4所述的基站,或者所述通信系统包括实施例 7所述的用户设备和 实施例 8所述的基站。
本发明实施例还提供了一种计算机可读程序, 其中当在终端设备中执行该程序 时, 该程序使得计算机在所述终端设备中执行实施例 1、 5所述的通信链路的选择方 法。 本发明实施例还提供了一种存储有计算机可读程序的存储介质, 其中该计算机可 读程序使得计算机在终端设备中执行实施例 1、 5所述的通信链路的选择方法。
本发明实施例还提供了一种计算机可读程序, 其中, 当在基站中执行该程序时, 该程序使得计算机在所述基站中执行实施例 2、 6所述的通信链路的选择方法。
本发明实施例还提供了一种存储有计算机可读程序的存储介质, 其中, 该计算机 可读程序使得计算机在基站中执行实施例 2、 6所述的通信链路的选择方法。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件实现。本发明 涉及这样的计算机可读程序, 当该程序被逻辑部件所执行时, 能够使该逻辑部件实现 上文所述的装置或构成部件, 或使该逻辑部件实现上文所述的各种方法或步骤。逻辑 部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及 用于存储以上程序的存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这 些描述都是示例性的, 并不是对本发明保护范围的限制。本领域技术人员可以根据本 发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围 内。

Claims

权 利 要 求 书
1、 一种通信链路的选择方法, 其中, 所述方法包括:
用户设备在与对端设备进行 D2D通信时, 测量当前正在使用的 D2D链路的信道 如果所述信道质量小于预先设定的第一阈值, 且基站为所述用户设备配置了候选 D2D链路, 则所述用户设备测量所述候选 D2D链路的信道质量;
所述用户设备根据预定策略向基站发送测量结果, 以便基站据此为所述用户设备 选择通信链路。
2、 根据权利要求 1 所述的方法, 其中, 所述用户设备根据预定策略向基站发送 测量结果包括:
如果在预先设定的第一计时器的计时时间内, 所述候选 D2D链路的信道质量始 终高于所述当前正在使用的 D2D链路的信道质量一个预先设定的偏移值, 则所述用 户设备向所述基站发送所述候选 D2D链路的测量结果, 以便所述基站据此确定是否 将所述用户设备当前正在使用的 D2D链路选择到所述候选 D2D链路上。
3、 根据权利要求 2所述的方法, 其中, 如果候选 D2D链路为多个, 则所述用户 设备在其中一个候选 D2D链路满足上述条件时, 向基站发送该满足条件的候选 D2D 链路的测量结果。
4、 根据权利要求 1 所述的方法, 其中, 所述用户设备根据预定策略向基站发送 测量结果包括:
如果在预先设定的第二计时器的计时时间内, 所述当前正在使用的 D2D链路的 信道质量和所述候选 D2D链路的信道质量都小于预先设定的第二阈值, 则所述用户 设备向所述基站发送所有 D2D链路的测量结果, 以便所述基站据此确定是否将所述 用户设备当前正在使用的 D2D链路选择到蜂窝链路上。
5、 根据权利要求 4所述的方法, 其中, 如果候选 D2D链路为多个, 则所述用户 设备在当前正在使用的 D2D链路和所有候选 D2D链路都满足上述条件时, 向基站发 送所述测量结果。
6、 一种通信链路的选择方法, 其中, 所述方法包括:
基站对用户设备进行测量配置, 以便所述用户设备根据所述测量配置进行信道测 量并上报测量结果;
基站在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定策略确定 是否将用户设备正在使用的 D2D链路选择为其他 D2D链路,或者确定是否将用户设 备正在使用的 D2D链路选择为蜂窝链路。
7、 根据权利要求 6所述的方法, 其中, 所述测量配置包括以下内容的任意组合: 用于进行候选 D2D链路测量的第一阈值;
用于进行 D2D链路间选择的测量上报触发条件;
用于进行 D2D链路到蜂窝链路的选择的测量上报触发条件。
8、 根据权利要求 7所述的方法, 其中, 所述第一阈值用于指示所述用户设备, 在测量获得的当前正在使用的 D2D链路的信道质量小于上述第一阈值时, 测量配置 的候选 D2D链路的信道质量。
9、 根据权利要求 7所述的方法, 其中, 所述用于进行 D2D链路间选择的测量上 报触发条件为: 偏移值和对应的计时器, 所述用于进行 D2D链路间选择的测量上报 触发条件用于指示所述用户设备, 在所述计时器的计时时间内, 如果测量获得的候选 D2D链路的信道质量比当前正在使用的 D2D链路的信道质量好上述偏移值, 则当所 述计时器过期时, 上报所述候选 D2D链路的测量结果。
10、 根据权利要求 7所述的方法, 其中, 所述用于进行 D2D链路到蜂窝链路的 选择的测量上报触发条件为: 第二阈值和对应的计时器, 所述用于进行 D2D链路到 蜂窝链路的选择的测量上报触发条件用于指示所述用户设备,在所述计时器的计时时 间内, 如果测量获得的所有 D2D链路的信道质量都小于上述第二阈值, 则当所述计 时器过期时, 上报所有 D2D链路的测量结果。
11、 一种用户设备, 其中, 所述用户设备包括:
第一测量单元, 其在用户设备在与对端设备进行 D2D通信时, 测量当前正在使 用的 D2D链路的信道质量;
第二测量单元, 其在所述信道质量小于预先设定的第一阈值, 且基站为所述用户 设备配置了候选 D2D链路时, 测量所述候选 D2D链路的信道质量;
发送单元, 其根据预定策略向基站发送测量结果, 以便基站据此为所述用户设备 选择通信链路。
12、 根据权利要求 11所述的用户设备, 其中, 所述发送单元包括: 第一判断模块, 其判断在预先设定的第一计时器的计时时间内, 所述候选 D2D 链路的信道质量是否始终高于所述当前正在使用的 D2D链路的信道质量一个预先设 定的偏移值;
第一发送模块,其在所述第一判断模块的判断结果为是时,当所述计时器过期时, 向所述基站发送所述候选 D2D链路的测量结果, 以便所述基站据此确定是否将所述 用户设备当前正在使用的 D2D链路切换到所述候选 D2D链路上。
13、 根据权利要求 12所述的用户设备, 其中, 如果候选 D2D链路为多个, 则所 述第一发送模块在其中一个候选 D2D链路满足上述条件时, 向基站发送该满足条件 的候选 D2D链路的测量结果。
14、 根据权利要求 11所述的用户设备, 其中, 所述发送单元包括:
第二判断模块, 其判断在预先设定的第二计时器的计时时间内, 所述当前正在使 用的 D2D链路的信道质量和所述候选 D2D链路的信道质量是否都小于预先设定的第 二阈值;
第二发送模块,其在所述第二判断模块的判断结果为是时,当第二计时器过期时, 向所述基站发送所有 D2D链路的测量结果, 以便所述基站据此确定是否将所述用户 设备当前正在使用的 D2D链路选择到蜂窝链路上。
15、 根据权利要求 14所述的用户设备, 其中, 如果候选 D2D链路为多个, 则所 述第二发送模块在当前正在使用的 D2D链路和所有候选 D2D链路都满足上述条件 时, 向基站发送所述测量结果。
16、 一种基站, 其中, 所述基站包括:
配置单元, 其对用户设备进行测量配置, 以便所述用户设备根据所述测量配置进 行信道测量并上报测量结果;
确定单元, 其在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定 策略确定是否将用户设备正在使用的 D2D链路切换为其他 D2D链路,或者确定是否 将用户设备正在使用的 D2D链路选择为蜂窝链路。
17、 根据权利要求 16所述的基站, 其中, 所述配置单元对所述用户设备进行的 测量配置包括以下内容的任意组合:
用于进行候选 D2D链路测量的第一阈值;
用于进行 D2D链路间选择的测量上报触发条件; 用于进行 D2D链路到蜂窝链路的选择的测量上报触发条件。
18、 根据权利要求 17所述的基站, 其中, 所述第一阈值用于指示所述用户设备, 在测量获得的当前正在使用的 D2D链路的信道质量小于上述第一阈值时, 测量配置 的候选 D2D链路的信道质量。
19、 根据权利要求 17所述的基站, 其中, 所述用于进行 D2D链路间选择的测量 上报触发条件为: 偏移值和对应的计时器, 所述用于进行 D2D链路间选择的测量上 报触发条件用于指示所述用户设备,在所述计时器的计时时间内, 如果测量获得的候 选 D2D链路的信道质量比当前正在使用的 D2D链路的信道质量好上述偏移值,则当 计时器过期时, 上报所述候选 D2D链路的测量结果。
20、 根据权利要求 17所述的基站, 其中, 所述用于进行 D2D链路到蜂窝链路的 选择的测量上报触发条件为: 第二阈值和对应的计时器, 所述用于进行 D2D链路到 蜂窝链路的选择的测量上报触发条件用于指示所述用户设备,在所述计时器的计时时 间内, 如果测量获得的所有 D2D链路的信道质量都小于上述第二阈值, 则上报所有 D2D链路的测量结果。
21、 一种通信链路的选择方法, 其中, 所述方法包括:
用户设备在与对端设备进行蜂窝通信时, 根据基站的测量配置, 测量所述基站为 所述用户设备配置的 D2D链路的信道质量;
如果在预先设定的第三计时器的计时时间内, 所述 D2D链路的信道质量小于预 先设定的第三阈值, 则所述用户设备向基站发送所述 D2D链路的测量结果, 以便基 站据此为所述用户设备选择通信链路。
22、 一种通信链路的选择方法, 其中, 所述方法包括:
基站为用户设备进行测量配置, 以便所述用户设备根据所述测量配置进行信道测 量并上报测量结果;
基站在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定策略确定 是否将用户设备正在使用的蜂窝链路选择为所述 D2D链路;
其中, 所述测量配置包括: 用于进行蜂窝链路到 D2D链路的选择的测量上报触 发条件。
23、 根据权利要求 22所述的方法, 其中, 所述用于进行蜂窝链路到 D2D链路的 选择的测量上报触发条件为: 第三阈值和对应的计时器, 所述用于进行蜂窝链路到 D2D 链路的选择的测量上报触发条件用于指示所述用户设备, 在所述计时器的计时 时间内, 如果测量获得的 D2D链路的信道质量好于上述第三阈值, 则当计时器过期 时, 上报所述 D2D链路的测量结果。
24、 一种用户设备, 其中, 所述用户设备包括:
测量单元, 其在所述用户设备与对端设备进行蜂窝通信时, 根据基站的触发测量 所述基站为所述用户设备配置的 D2D链路的信道质量;
判断单元, 其判断在预先设定的第三计时器的计时时间内, 所述 D2D链路的信 道质量是否小于预先设定的第三阈值;
发送单元, 其在所述判断单元的判断结果为是时, 向基站发送所述 D2D链路的 测量结果, 以便基站据此为所述用户设备选择通信链路。
25、 一种基站, 其中, 所述基站包括:
配置单元, 其为用户设备进行测量配置, 以便所述用户设备根据所述测量配置进 行信道测量并上报测量结果;
确定单元, 其在接收到用户设备上报的测量结果后, 根据所述测量结果以及预定 策略确定是否将用户设备正在使用的蜂窝链路选择为所述 D2D链路;
其中, 所述测量配置包括: 用于进行蜂窝链路到 D2D链路的选择的测量上报触 发条件。
26、 根据权利要求 25所述的基站, 其中, 所述用于进行蜂窝链路到 D2D链路的 选择的测量上报触发条件为: 第三阈值和对应的计时器, 所述用于进行蜂窝链路到 D2D 链路的选择的测量上报触发条件用于指示所述用户设备, 在所述计时器的计时 时间内, 如果测量获得的 D2D链路的信道质量好于上述第三阈值, 则当所述计时器 过期时, 上报所述 D2D链路的测量结果。
27、 一种通信系统, 其中, 所述通信系统包括权利要求 11-15任一项所述的用户 设备和权利要求 16-20任一项所述的基站, 或者所述通信系统包括权利要求 24所述 的用户设备和权利要求 25-26任一项所述的基站。
28、 一种计算机可读程序, 其中当在终端设备中执行该程序时, 该程序使得计算 机在所述终端设备中执行权利要求 1-5、 21任一项所述的通信链路的选择方法。
29、 一种存储有计算机可读程序的存储介质, 其中该计算机可读程序使得计算机 在终端设备中执行权利要求 1-5、 21任一项所述的通信链路的选择方法。
30、 一种计算机可读程序, 其中, 当在基站中执行该程序时, 该程序使得计算机 在所述基站中执行权利要求 6-10、 22-23任一项所述的通信链路的选择方法。
31、 一种存储有计算机可读程序的存储介质, 其中, 该计算机可读程序使得计算 机在基站中执行权利要求 6-10、 22-23任一项所述的通信链路的选择方法。
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