WO2013117124A1 - 一种d2d通信中的资源协商方法及设备 - Google Patents

一种d2d通信中的资源协商方法及设备 Download PDF

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Publication number
WO2013117124A1
WO2013117124A1 PCT/CN2013/070585 CN2013070585W WO2013117124A1 WO 2013117124 A1 WO2013117124 A1 WO 2013117124A1 CN 2013070585 W CN2013070585 W CN 2013070585W WO 2013117124 A1 WO2013117124 A1 WO 2013117124A1
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Prior art keywords
beacon frame
discovery
resource
beacon
current
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PCT/CN2013/070585
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English (en)
French (fr)
Inventor
张向东
夏金环
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华为技术有限公司
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Publication of WO2013117124A1 publication Critical patent/WO2013117124A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a resource negotiation method and device in D2D communication. Background technique
  • the Internet of Things refers to the acquisition of information about the physical world by deploying various devices with certain sensing, computing, execution and communication capabilities, and the realization of information transmission, coordination and processing through the network, thereby realizing the interconnection of people, things and things. network of.
  • the Internet of Things is to achieve the interconnection of people and things, things and things.
  • Applications for the Internet of Things include smart grids, smart agriculture, smart communications, and environmental testing.
  • D2D (Device-to-Device) communication as a kind of IoT application, mainly realizes direct communication between two devices.
  • D2D communication technologies include: WPAN (Wireless Personal Area Network Communication Technologies), UWB (Ultra Wideband), Bluetooth, Wifi (Wireless Broadband) and other short-range wireless communication technologies.
  • the existing UWB system provides a method for device discovery. Since UWB is a fully distributed system, device discovery and resource negotiation are implemented between UWB devices by periodically transmitting beacon frames in a superframe.
  • a UWB superframe with a length of 65536 s consists of 256 MAS (Medium Access Slots), each MAS having a length of 256 ⁇ ⁇ .
  • Each UWB superframe starts with a BP (beacon period), and each beacon period can include several beacon slots, and the length of the beacon slot can be 85 ⁇ ⁇ .
  • the maximum length of BP can be 96 beacon slots.
  • the resource allocation manners in the prior art include: a method for reserving resources, that is, a device for which resources are reserved may send information in reserved resources; and another method is a contention method. That is, in addition to BP and the above reserved resources, the information is transmitted in a competitive manner.
  • the beacon frame Since the device does not consider the available resource problem of transmitting the beacon frame when performing the discovery, the beacon frame is arbitrarily transmitted on the resources of the existing cellular communication, which may cause interference to the existing cellular communication, even if the device can realize the discovery.
  • the beacon frame contains reservation information directly related to a certain MAS, there may be a resource reservation conflict, and a complicated conflict processing process is required, which also leads to efficiency of resource negotiation between devices. relatively low.
  • the embodiments of the present invention provide a resource negotiation method and device in D2D communication, so as to improve the efficiency of resource negotiation between devices in D2D communication by improving the resource negotiation process.
  • an embodiment of the present invention provides a resource negotiation method in D2D communication, where the method includes:
  • the current device receives resource requirement information that is sent by the other device in the current super frame, where the resource requirement information includes a service priority of the other device, a beacon slot where the other device beacon is located, and/or the other The number of resources requested by the equipment;
  • the current device calculates a resource location that the current device can allocate according to the service priority of the other device, the beacon slot in which the other device beacon is located, and/or the number of resources requested by the other device.
  • the embodiment of the present invention further provides a device in D2D communication, where the device includes: a first receiving module, configured to receive resource requirement information sent by another device in a current super frame, where the resource requirement information includes the other device a service priority, a beacon slot in which the other device beacon is located, and/or a number of resources requested by the other device;
  • a calculation module configured to calculate, according to the service priority of the other device, the beacon time slot where the other device beacon is located, and/or the number of resources requested by the other device, The location of the resource to which it is assigned.
  • resource demand information such as the service priority of the device, the beacon slot where the beacon is located, and/or the number of resources requested by the device can be calculated, and each device can be allocated by itself.
  • the location of the resource so that each device sends information on the location of the resource that it can allocate, so that the efficiency of resource negotiation is improved, and the efficiency of sending information can be improved.
  • Embodiment 1 is a flow chart of Embodiment 1 of a device discovery method of the present invention.
  • Embodiment 2 is a flow chart of Embodiment 2 of the device discovery method of the present invention.
  • FIG. 3 is a flowchart of an embodiment of a resource negotiation method of the present invention.
  • Figure 4 is a flow chart of step 301 in the flow chart shown in Figure 3;
  • FIG. 5 is a flowchart of an embodiment of an information transmitting method of the present invention.
  • Figure 6 is a schematic structural view of a device embodiment 1 of the present invention.
  • Figure 7 is a schematic structural view of the discovery module 602 in the embodiment shown in Figure 6;
  • Figure 8 is a schematic structural view of a second embodiment of an apparatus of the present invention.
  • FIG. 9 is a schematic structural view of another apparatus embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a computing module 902 in the device embodiment shown in FIG. 9;
  • FIG. 11 is a schematic structural view of still another embodiment of the apparatus of the present invention. detailed description
  • the device in the embodiment of the present invention firstly acquires the available resources of the beacon frame from the base station or other device of the cellular communication, and the letter used in the embodiment of the present invention.
  • the beacon frame in the embodiment of the present invention includes one or more of the following fields in addition to the beacon transmitting device identifier, the beacon receiving device identifier, and the beacon slot number: Frame type identifier, master-slave communication device identifier, beacon frame available resource location, service type, communication peer device identifier, number of requested resources, and location where information is sent.
  • which fields are included in the beacon frame may be different according to whether the devices participating in the D2D communication perform mutual discovery, resource negotiation, or information transmission. Devices for D2D communication communicate via the carrier's licensed band.
  • the beacon frame type identifier may identify the type of the beacon frame, and may be a "device discovery beacon frame", a "resource application beacon frame”, and a "information transmission notification beacon frame".
  • the device that participates in the D2D communication may send the device discovery beacon frame to implement the discovery of the beacon frame sending device by other devices, or the discovery of other specified devices, and the resource application beacon frame may be used after the device is discovered.
  • the beacon frame is sent to negotiate the available resources.
  • the information transmission notification beacon frame can be used to indicate that the information is sent in the current superframe, and the receiving device is instructed to receive the information at the corresponding resource location. It can be seen that different beacon frame types contain different information content, and can also meet different functional requirements in practical applications.
  • the resource application is performed after the device is successfully discovered.
  • the device can also implement the device discovery, including the discovery of the specified device.
  • the information transmission notification letter The frame frame is performed on the basis of successful resource application, but the device can also implement device discovery or resource negotiation when receiving the resource request beacon frame.
  • Master-slave communication device identification A device used to identify whether a device transmitting a beacon frame is a master device or a slave device. Both sides of the D2D communication, whether or not they lose connection with the base station, only need to communicate in the master-slave mode, the device in the master position is the master device, and the device in the slave state is the slave device. If the communication is not in the master-slave mode, the D2D communication parties have equal status, and the master and slave devices are not distinguished.
  • the master device may obtain the available resource location information of the beacon frame from the base station side of the cellular communication or other master device side, or may define the available resource location information of the beacon frame by itself, and may obtain the above acquired or defined as needed.
  • the beacon frame may be sent to the slave device by using the resource location information; the slave device may acquire the available resource location information of the beacon frame from the base station side or the master device side of the cellular communication, instead of Can define the available resource location information of the beacon frame by itself.
  • the master and slave devices need to obtain the available resource location information of the beacon frame before transmitting the beacon frame.
  • the definition criteria of the master-slave device may be: (1) When all D2D devices can be connected to the cellular communication network base station, all devices can obtain the beacon frame from the cellular communication base station side.
  • the available resource location information may be determined whether the master-slave communication and the master-slave status in the master-slave communication determine whether the device is a master device or a slave device; (2) when a part of the D2D device loses connection with the base station The device that loses connection with the base station may be a slave device, and the other device may determine the master device or the slave device according to whether the master-slave communication mode is selected and the master-slave status in the master-slave communication mode; (3) When all D2D communication devices lose connection with the base station, some devices may be selected as the master device according to certain rules, for example, a device with a beacon slot of 0, 1, or other time slots is selected as the master device, and the remaining device The device corresponding to the time slot acts as a slave device. It should be noted that, unless
  • Beacon frame available resource location The location of the resource that can send the beacon frame can be indicated in the form of a bitmap
  • Service Type It is used to identify the type of service required by the beacon sending device. It can indicate which service type the current device is performing, such as voice service, video service, and meter reading service. It should be noted that the service type of the device can be pre-defined.
  • the communication peer device identifier is used to uniquely identify the communication peer device, and the communication peer device identifier sets the identifier of the different communication peer device according to the type of the beacon frame;
  • Number of requested resources The number of resources requested by the sending device of the beacon frame in the next superframe. It should be noted that, for the sake of fairness, the number of resources requested by each device in each superframe period may be limited, so that other devices may apply for resource reservation opportunities in the same superframe;
  • Location of message transmission Indicates the location of the resource used for information transmission in the current superframe. It should be noted that the above fields are not necessarily included in each type of beacon frame, and may be selected according to functional requirements. The content included in the beacon frame can be determined based on the "Beacon Frame Type Identification" field.
  • the embodiment of the present invention defines the available resources as a "superframe period", and divides a "superframe period” into a “beacon period” and a “data period”, and the device participating in the D2D communication can be in the "" Beacon period” sends various types of beacon frames within the "data period” Send information.
  • the “superframe period” is not limited to a period of time in the time domain, but may be all available resources in a period of time and/or a period of frequency. For example, it may be all available time-frequency resource blocks in one subframe in an LTE (Long Term Evolution) system; likewise, the "beacon period” and the “data period” are not limited to a period of time in the time domain. It can also be a band in the frequency domain.
  • the “beacon period” is further divided into a number of "beacon slots", for example, a time-frequency resource that is smaller than the "beacon period” in the LTE system.
  • an implementation manner of a device discovery method provided by an embodiment of the present invention may include the following steps:
  • Step 101 The receiving device receives the first device discovery beacon frame sent by the other D2D device, where the parameter of the first device discovery beacon frame includes: the first communication peer device identifier; the first communication peer device identifier does not When it is empty, it indicates that the beacon frame sending device participates in the device discovery process of the receiving device, and the non-empty communication peer device identifier is the identifier of the receiving device.
  • the parameter that the device finds the beacon frame may include at least: the communication peer device identifier; when the communication peer device identifier is not empty And indicating that the other device is in the device discovery process of the current device, and the first communication peer device that is not empty is identified as the identifier of the current device.
  • the communication peer device identifier indicates the identifier of the receiving device
  • the discovery of the designated device that is, the receiving device
  • the specified device discovery sent before the receiving device can be implemented. The requested response.
  • the device discovery beacon frame may further include a master-slave communication device identifier, and the active communication device identifier may indicate whether the device that the device discovers the beacon frame is a master device or a slave device.
  • the device discovery process may also be divided into a first device discovery sub-process and a second device discovery sub-process because the device includes different fields included in the beacon frame.
  • the sending device discovers the beacon frame 1 (for convenience of distinction, the device discovery beacon frame sent in the first device discovery sub-process is defined as the device discovery beacon frame 1 and the second The device discovery beacon frame sent in the device discovery sub-process is defined as the other device of the device discovery beacon frame 2), and in this case, the device discovery beacon frame 1 may specifically include: a beacon frame type identifier The master-slave communication device identifier, the beacon frame available resource location, the communication peer device identifier, and the service type; wherein, the beacon frame type identifier indicates that the current beacon frame is the device discovery beacon frame 1, that is, the currently participating device
  • the discovery process is a first device discovery sub-process; the master-slave communication device identification is indicated as The master device; the beacon frame available resource location may indicate the resource that can transmit the beacon frame in the form of a bitmap; and for the communication peer device identifier: if the target device is instructed to be discovered, or the response of the request is found for another device, then The field is set to the beacon frame 1 (for convenience of
  • the master device sends the device discovery beacon frame 1
  • the beacon frame indicated as the slave device is not monitored.
  • the master device may be selected to periodically send the beacon frame; if there are slave devices in the network, that is, the network is monitored.
  • the "master-slave communication device identification" field indicates a beacon frame of the slave device, or a master device in the network that needs to acquire beacon frame position information from other master devices exists, the selected master device continuously transmits the beacon frame.
  • the above "selected master device” can be selected according to the established rules.
  • the master device when there are multiple master devices in the network, you can select the master device with a small or large beacon slot number. When there is no master device in the network, the device can be in a voluntary manner, or it can be agreed by some devices. For example, if the beacon time slot is smaller or larger, the role change is converted to the master device, and then the device is selected as the "selected master device" from the transformed master device.
  • the "device discovery beacon frame 2" sent by other devices specifically includes: a beacon frame type identifier, a master-slave communication device identifier, a communication peer device identifier, and a service type.
  • the beacon frame type identifier indicates that the current beacon frame is the device discovery beacon frame 2, that is, the currently participating device discovery process is the second device discovery sub-process; and the master-slave communication device identifier is based on the transmitted beacon frame.
  • the device is set from the device or the master device; for the communication peer device identifier: If the target is found, or the response to the discovery request of the other device, then the field is set to find the identity of the target device, or send The identified identity of the device is found; otherwise, the identity is set to null; the service type is set to indicate the type of service required by the beacon sending device.
  • the device discovers that the beacon frame 2 is mainly transmitted by the slave device, enables other devices to discover it, or discovers the designated device.
  • the master device that needs to periodically or continuously send the device discovery beacon frame 1 in the first device discovery sub-process may also send the device discovery beacon in addition to the device discovery beacon frame.
  • Frame 2 The master device that is not selected to send "Device Discovery Beacon Frame 1" can continuously send the device discovery beacon frame 2.
  • Step 102 The receiving device implements discovery of the other device according to the first communication peer device identifier in the first device discovery beacon frame.
  • the receiving device determines whether the device discovery beacon frame 1 or the device sends the specific, if the communication peer identifier in the device discovery beacon frame is empty, the receiving device receives the The discovery of the beacon frame by the device enables the discovery of the transmitting device. If the communication peer identifier is not empty, the receiving device needs to determine whether it has sent the device discovery beacon frame to the other device. If not, the receiving device returns the device discovery beacon frame to the other device.
  • a device discovery request for indicating a target of the discovery of the beacon frame sending device, where the returned device finds that the communication peer device identifier in the beacon frame is an identifier of the other device; if yes, the receiving device Directly discovering the other device according to the device discovery beacon frame, that is, the received beacon frame is a response to the beacon frame sent by the receiving device, and completes the indication and discovery target initiated by itself.
  • Device discovery process
  • the receiving device may also use the information information of the "beacon frame available resource location" carried by the beacon frame. Obtaining a resource location that can send a beacon frame, and then selecting a free time slot according to the beacon frame information sent by other devices that are monitored, and sending a device discovery signal on the unused resource in the beacon frame available resource. Frame the frame so that other devices can find themselves.
  • the device discovery request device Drequest needs to be monitored.
  • the entire device discovery process is completed by discovering the corresponding device discovery beacon frame sent by the target device Dresponse.
  • it may also be set, if the device Drequest attempts to send a certain device discovery beacon frame for the device Dresponse several times, or within a certain period after a certain device finds the beacon transmission, the discovery is not received.
  • the response beacon frame of the target device Dresponse is considered to be found that the target device Dresponse is not in its communication range.
  • the sending device when the device performs discovery, sends a beacon frame, and also includes the communication.
  • the peer device identifier when the communication peer device identifier is empty, can realize the discovery of any device.
  • the communication peer device identifier indicates the designated device, and the identifier of a certain receiving device and the communication peer device
  • the receiving device returns the device discovery beacon frame whose communication peer device identifier is set to the other device identifier to other devices that send the beacon frame, so that the discovery process of the designated device can be realized, and the next step is also a resource.
  • the negotiation process saves time and improves efficiency in subsequent resource negotiation.
  • another embodiment of the device discovery method provided by the embodiment of the present invention may include the following steps:
  • Step 201 The sending device acquires the beacon frame available resource location information and the superframe period information, and scans at least one beacon period. If the at least one beacon frame is scanned in the beacon period, the process proceeds to step 202. If the beacon frame is not scanned within the beacon period, the process proceeds to step 203.
  • Step 202 Select an idle beacon slot in the beacon period, and send a first device discovery beacon frame to other devices in the D2D communication on the beacon slot.
  • Step 203 arbitrarily select one beacon slot in the beacon period, and send a second device discovery beacon frame to other devices in the D2D communication on the arbitrarily selected beacon slot.
  • the sending device before sending the beacon frame, the sending device first acquires the available resource location information of the beacon frame and the superframe period information, and the primary device may acquire the available resource location of the beacon frame from the cellular communication network side or other host device side.
  • Step 204 The other device synchronizes with the sending device according to the first device discovery beacon frame or the second device discovery beacon frame.
  • the slave device In practical applications, it is not necessarily the slave device that needs to be synchronized. If the master device cannot synchronize with the cellular network and does not define its own superframe period, it needs to synchronize with the existing superframe period. Two master devices can also communicate.
  • Step 205 The other device implements discovery of the other device according to the first device discovery beacon frame or the second device discovery beacon frame.
  • the other device further discovers the transmitting device according to the received first device discovery beacon frame or the second device discovery beacon frame.
  • the specific discovery process is described in detail in Embodiment 1, and details are not described herein again.
  • Step 206 In a case that the parameter that the first or second device finds that the beacon frame further includes a beacon frame available resource location, the beacon frame available resource location is used to indicate a resource that can currently send a beacon frame. The other device acquires a beacon frame available resource location that can send a third device discovery beacon frame according to the first device discovery beacon frame.
  • the available resource location of the beacon frame may indicate that the beacon frame can be currently sent. Resources,.
  • the master device that the device discovers the beacon frame can obtain the available resource location of the beacon frame from the base station side; Connect, then the master device obtains the resource location information of the beacon frame from the other master device side, or sets the available resource location of the beacon frame by itself.
  • the master device sends the beacon frame available resource location to other master devices or slave devices as needed; the slave device completes synchronization and available resource selection based on the available resource locations of the beacon frames transmitted by the master device.
  • Step 207 The receiving device returns a third device discovery beacon frame on the resource location that is not used in the beacon frame available resource.
  • the receiving device may return a third device discovery beacon frame on the resource location that is not used in the beacon frame available resource, to implement the discovery of the current device by the other device, where The third device discovers that the second communication peer device identifier in the beacon frame is the identifier of the other device.
  • the receiving device may also obtain the information according to the "beacon frame available resource location" information. Sending the resource location of the beacon frame, and then selecting a free time slot according to the beacon frame information sent by other devices monitored, and transmitting its own beacon frame on the unused resources of the beacon frame available resources, thereby being able to Let other devices discover themselves.
  • the current device scans before the sending device discovers the beacon frame, and can synchronize with other devices, and can also send the device discovery beacon to other devices based on the discovery of other devices. Frames to enable other devices to discover themselves.
  • the resource negotiation method provided by the embodiment of the present invention may include the following steps: Step 301: A current device receives resource requirement information sent by another device in a current superframe, where the resource is The demand information includes a service priority of the other device, a beacon slot where the other device beacon is located, and/or a quantity of the other device requesting resources.
  • the present embodiment can be applied to the current device and other devices that have been mutually discovered by the IoT D2D communication. After the current device receives the beacon frame sent by other devices and obtains the resource requirement information, the current device can be based on other devices. The service priority, and/or the beacon time slot in which other device beacons are located, and/or the number of other device application resources calculate the resource location from which the information can be sent.
  • Step 302 The current device calculates a resource location that the current device can allocate according to the service priority of the other device, the beacon slot where the other device beacon is located, and/or the number of resources requested by the other device.
  • the step 302 may include: Step 401: The current device is in accordance with the other device.
  • the service priority, and/or the beacon time slot in which the other device beacon is located, and/or the number of the other device application resources are sorted by the device having the resource request requirement; the device having the resource application request Including the current setting And other equipment;
  • the D sender is an information sending device, and D rece is an information receiving device. All D sender devices that have information transmission requirements, after obtaining the resource requirement information, perform resource negotiation according to the following rules:
  • the D sender device After the D sender device listens to all the beacons, it acquires the resource requirement information of itself and neighboring devices, and then, according to the service priority, the resource demand information is from high to low, and the beacon slot where the device beacon is located is from large to small. (or from small to large), the number of resources requested is sorted from large to small (or small to large), then allocates the available resources in the "data period" of the next superframe, and calculates the resources that can be allocated by itself. s position.
  • the service with higher priority has priority in obtaining resource allocation; in the case of equal service priority, the beacon time slot is smaller (large) and the priority is obtained by resource allocation; or, in the same service In the case of priority, the demand for a larger (small) number of resource requests is prioritized for resource allocation.
  • D sender sorts the devices that apply for resources according to the above priority, for example, the sort result is: D 1 D 2
  • D S ender D n-1, D n the corresponding resources are applied for: R, R 2 R sen der R n-1, R n.
  • the current device may acquire the resource requirement by receiving a resource request beacon frame including the quantity of the requested resource, or sending a notification beacon frame by receiving information including the quantity of the applied resource. The number of resources requested by the other devices in the information.
  • Step 402 Calculate resources that the current device can allocate according to the result of the sorting. According to the sorting result in step 401, it can be known that the resources that D sender can occupy are
  • the beacon frame of the next super frame includes the location of the applied resource; otherwise, The device continues to send "resource request beacon frame" in the "beacon period” of the next superframe to continue to apply for resources.
  • a period can be set, so that the priority of resource allocation is allocated in order of service priority from small to large.
  • the number of beacon slots and the number of resources requested can also be allocated with reference to a certain period.
  • the priority changes from small to large or from large to small, or the priority of the beacon slot can be cyclically shifted, for example, there are N beacon slots, the first time with "Nl, N-2 1 , 0" is the priority order, the second time is "N-2 1, 0,
  • N-1 is the priority order, and then loops in sequence.
  • the resource application process in this embodiment may also be divided into a first resource application sub-process and a second resource application sub-process according to the difference of the transmitted resource application beacon frame, and sent in the first resource application sub-process.
  • the first resource application beacon frame includes a beacon frame type identifier, a master-slave communication device identifier, a beacon frame available resource location, a communication peer device identifier, a service type, and a quantity of the requested resource; wherein, the beacon frame type identifier: For indicating the "first resource application beacon frame"; the master-slave communication device identifier is set according to whether the current device is a slave device or a master device; the beacon frame available resource location indicates, in a bitmap form, a resource that can transmit a beacon frame.
  • the communication peer device identifier indicates the identifier of the peer device that requests the resource to communicate;
  • the service type indicates the service type required by the beacon sending device (current device); the requested resource quantity is used to indicate the number of resources requested.
  • the first resource request beacon frame may be sent by the "selected master device” that needs to send "device discovery beacon frame 1", and needs to perform resource application for resource application.
  • the second resource application sub-process sends a "second resource application beacon frame", including a beacon frame type identifier, a master-slave communication device identifier, a communication peer device identifier, a service type, and a quantity of resources requested;
  • the beacon frame type identifier is indicated as "second resource request beacon frame”;
  • the master-slave communication device identifier is set according to whether the current device is a slave device or a master device;
  • the communication peer device identifier indicates a peer device that requests the resource to communicate
  • the service type indicates the type of service required by the beacon sending device; the number of resources requested is used to indicate the number of resources requested.
  • the second resource request beacon frame may be sent by the "selected master device” that needs to send “device discovery beacon frame 1", when the resource request is required, and when the device discovery beacon frame is not required to be sent,
  • the second resource application beacon frame is used for the resource application; the master device other than the selected main device and the slave device may send the second resource application beacon frame for resource application when the resource application is required.
  • the resource application beacon frame sent in this embodiment is applied for the next one.
  • Resources in a superframe That is, the device that sends the resource application beacon frame applies for the resource by sending a "resource application beacon frame" in the current superframe, and uses the requested resource (if the resource application is successful) to send the information in the next superframe, and if The device does not apply for resources, and the next superframe will continue to apply for resources.
  • the resource negotiation process after the discovery of the device can be simplified by performing the negotiation of the resource application on the two devices that have implemented the discovery, and because each device is based on the resource application situation of itself and other devices. Resource negotiation, so the efficiency of resource negotiation between devices can be improved.
  • the method for sending information provided by the embodiment of the present invention may include the following steps: Step 501: The current device receives resource requirement information sent by another device in a current superframe.
  • the resource requirement information includes a service priority of the other device, a beacon slot where the other device beacon is located, and/or a quantity of resources requested by the other device;
  • the present embodiment is applied to current devices and other devices that have been mutually discovered in the Internet of Things D2D communication, and the current device is the device that needs to transmit information.
  • Step 502 The current device calculates, according to the service priority of the other device, the beacon slot where the other device beacon is located, and/or the number of resources requested by the other device, the current device can be allocated. Resource location
  • Step 503 In the next superframe of the current superframe, the current device sends an information sending notification beacon frame to the other device, where the information sending notification beacon frame includes a location for sending information.
  • the location where the information is sent is used to indicate the resource location currently used by the current device.
  • the information transmission process is also divided into a first information transmission sub-process and a second information transmission sub-process according to different information transmission notification beacon frames, wherein the information transmission notification beacon frame is used to notify the receiving device of the current super frame. There is information to send.
  • the sent first information sending notification beacon frame includes: a beacon frame type identifier, a master-slave communication device identifier, a beacon frame available resource location, a communication peer device identifier, a service Type, number of resources requested, and location where the information is sent; where, the beacon frame class The type identifier is indicated as "first information transmission notification beacon frame"; the master-slave communication device identifier is set according to whether the device is a slave device or a master device; the beacon frame available resource location may indicate a resource capable of transmitting a beacon frame in a bitmap form
  • the communication peer device identifier indicates the identifier of the information receiving device; the service type indicates the service type required by the beacon transmitting device; the number of applied resources: If the information sending device information is not sent, the field is set to the information sending device to continue to apply The number of resources. Otherwise, if the information sending device information is sent, the field is blank, indicating that the next superframe information sending device no longer applies for resources; the location where the beacon frame class The type
  • the first information transmission notification beacon frame is sent by the "selected master device” that needs to transmit the "device discovery beacon frame”, and is sent when the information transmission notification is needed, and is used for information transmission notification.
  • the sent “second information sending notification beacon frame” includes: a beacon frame type identifier, a master-slave communication device identifier, a communication peer device identifier, a service type, and a quantity of applied resources.
  • the beacon frame type identifier is indicated as "second information transmission notification beacon frame"; the master-slave communication device identifier is set according to whether the sending device is a slave device or a master device; the communication peer device identifier Then, the identifier of the information receiving device is indicated; the service type indicates the type of service required by the beacon sending device; the number of resources requested: If the information sending device information is not sent, the field is set to the number of resources that the information sending device continues to apply. Otherwise, if the information sending device information is sent, this field is blank, indicating that the next superframe information sending device no longer applies for resources; the location where the information is sent indicates the location of the currently used resource.
  • the second information transmission notification beacon frame is sent by the selected master device that needs to send the "device discovery beacon frame", when the information transmission notification is required, and when the device discovery beacon frame is not required to be sent,
  • the second information transmission notification beacon frame performs information transmission notification; the master device other than the "selected master device” and the slave device send the second information transmission notification when the information transmission notification is required
  • the beacon frame is sent to inform the information.
  • the other device may receive information at the currently used resource location.
  • the receiving device D reeeiver that receives the information transmission notification beacon frame, after all the beacon receptions are completed in the beacon period of one super frame, if the "communication peer device identification" is set as its own identity"
  • the information transmission notification beacon frame "" receives the information on the resource of the "data period” indicated by the "location of information” item in the information transmission beacon frame.
  • the receiving device can also After the "resource application beacon frame” that receives the "communication peer device identification” set to its own identity, the necessary preparation is made to better receive the information in the next superframe.
  • the information sending method in this embodiment is performed based on resource negotiation, and the problem of low information transmission efficiency caused by the contention resources between devices in the prior art is well solved, and the foregoing resource negotiation is based on the application of the device itself.
  • the resource can also make the information sending process relatively simple, and improve the efficiency of information transmission between devices.
  • the embodiment of the present invention further provides a schematic structural diagram of an apparatus embodiment, where the device may include: a second receiving module 601, configured to: Receiving a first device discovery beacon frame sent by another device participating in the D2D communication, where the parameter of the first device discovery beacon frame includes: a first communication peer device identifier; the first communication peer device identifier is not When it is empty, it indicates that the other device is in the device discovery process of the receiving device, and the first communication peer device that is not empty is identified as the identifier of the receiving device;
  • the discovery module 602 is configured to implement discovery of the other device according to the first communication peer device identifier in the first device discovery beacon frame.
  • the discovery module 602 may be specifically configured to: discover the discovery of the other device by receiving the first device discovery beacon frame in the case that the primary and secondary communication device identifiers are empty.
  • the discovery module 602 can include:
  • a determining sub-module 701 configured to determine whether a second device discovery beacon frame has been sent to the other device
  • the sub-module 703 is configured to implement discovery of the other device directly according to the first device discovery beacon frame if the result of the determining module is yes.
  • the device that is sent by the device in the present embodiment sends a beacon frame, and includes a master-slave communication device identifier and a communication peer device identifier, where the device that is currently performing device discovery is a master device and a slave device, and
  • the device discovery process can also directly perform the device discovery process. Therefore, the device discovery method in the prior art can save time for the next resource negotiation process, thereby improving efficiency in subsequent resource negotiation.
  • the device in this embodiment may specifically include:
  • the scanning module 801 is configured to scan at least one beacon period.
  • the first selection module 802 is configured to select an idle beacon slot in the beacon period in the case of scanning to the beacon period.
  • the second selection module 803 is configured to arbitrarily select a beacon slot within the beacon period without scanning the beacon period.
  • Sending a beacon frame module 804 configured to send a device discovery beacon frame to other devices in the current Internet of Things on the beacon slot; or to the current Internet of Things in the arbitrarily selected beacon slot The other device sends a device discovery beacon frame.
  • a second receiving module 601 configured to receive a first device discovery beacon frame sent by another device that participates in the D2D communication, where the parameter of the first device discovery beacon frame includes: a first communication peer device identifier; When the first communication peer device identifier is not empty, it indicates that the other device is in the device discovery process of the receiving device, and the first communication peer device that is not empty is identified as the identifier of the receiving device.
  • the discovery module 602 is configured to implement discovery of the other device according to the first communication peer device identifier in the first device discovery beacon frame.
  • the method may further include:
  • the synchronization module 805 is configured to implement synchronization with the other device according to the device discovery beacon frame.
  • the beacon frame available resource location is used to indicate a resource that can currently send a beacon frame;
  • the back submodule can include:
  • the acquiring resource location sub-module 806 is configured to acquire, according to the first device discovery beacon frame sent by the monitored other device, a location of a beacon frame available resource that can send the third device discovery beacon frame; and a sending submodule 807, configured to:
  • the third device discovery beacon frame is selected by selecting an idle time slot at a resource location that is not used in the beacon frame available resource.
  • the current device scans before the sending device discovers the beacon frame, and can synchronize with other devices, and can also send the device discovery message to other devices based on the discovery of other devices. Frame frames to enable other devices to discover themselves.
  • the embodiment of the present invention further provides a schematic structural diagram of another device, which has been found to participate in the Internet of Things D2D communication.
  • the current device may specifically include:
  • the first receiving module 901 is configured to receive resource requirement information that is sent by the other device in the current super frame, where the resource requirement information includes a service priority of the other device, and a beacon of the other device beacon. And the number of resources requested by the other device;
  • the first receiving module 901 may specifically include: a receiving submodule, configured to receive a resource application beacon frame or an information sending notification beacon frame; and obtain a resource quantity submodule, configured to apply for a beacon from the resource The frame or the information transmission notification beacon frame acquires the quantity of the other device application resources in the resource requirement information.
  • the calculating module 902 is configured to calculate, according to the service priority of the other device, the beacon slot where the other device beacon is located, and/or the number of resources requested by the other device, the resource location that the device can allocate .
  • the calculating module 902 may specifically acquire the applied request in the resource requirement information by receiving a resource request beacon frame including the quantity of the applied resource, or sending a beacon frame by receiving the information including the quantity of the applied resource. The number of resources.
  • the calculating module 902 can include:
  • the sorting sub-module 1001 is configured to: according to the service priority of the other device, and/or the beacon time slot where the other device beacon is located, and/or the quantity of the other device requesting resources, the device having the resource request requirement Sorting; the device having the resource application requirement includes the current device and the other device.
  • the calculating submodule 1002 is configured to calculate, according to the result of the sorting, resources that the current device can allocate.
  • the device because the current device performs resource negotiation based on the resource application situation of the user and the neighboring device, the device does not conflict with other devices during the resource application process, and the efficiency of resource negotiation between devices can be improved.
  • the embodiment of the present invention further provides a schematic structural diagram of another device embodiment, which may specifically include:
  • the first receiving module 901 is configured to receive resource requirement information that is sent by the other device in the current super frame, where the resource requirement information includes a service priority of the other device, and a beacon of the other device beacon. And the number of resources requested by the other device;
  • the calculating module 902 is configured to calculate, according to the service priority of the other device, the beacon slot where the other device beacon is located, and/or the number of resources requested by the other device, the resource location that the device can allocate .
  • the sending module 1101 is configured to send, to the other device, an information sending notification beacon frame in a next superframe of the current superframe, where the information sending notification beacon frame includes a location for sending information, where The location of the information transmission is used to indicate the resource location currently used by the current device.
  • the device in this embodiment performs the information transmission based on the foregoing resource negotiation, which can well solve the problem that the information transmission efficiency caused by the contention resources between the devices in the prior art is low, and because the foregoing resource negotiation is based on the device itself.
  • the application of the resources can also make the information transmission process relatively simple, and improve the efficiency of information transmission between devices.
  • the embodiments are mainly described as being different from the other embodiments, and the same similar parts between the respective embodiments can be referred to each other.
  • the description since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

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Abstract

一种D2D通信中的资源协商方法及设备,所述方法包括:所述当前设备接收其他设备在当前超帧发送的资源需求信息,所述资源需求信息包括所述其他设备的业务优先级、所述其他设备信标所在的信标时隙和/或所述其他设备申请资源的数量;所述当前设备依据所述其他设备的业务优先级、所述其他设备信标所在的信标时隙和/或所述其他设备申请资源的数量,计算所述当前设备能够分配到的资源位置。采用本发明实施例的方法或设备,避免了对于同样的资源有多个设备竞争的现象,提高了设备之间资源协商的效率。

Description

一种 D2D通信中的资源协商方法及设备
本申请要求于 2012 年 2 月 7 日提交中国专利局、 申请号为
201210026398.7、发明名称为"一种 D2D通信中的资源协商方法及设备"的中国 专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域, 尤其涉及一种 D2D通信中的资源协商方法及 设备。 背景技术
物联网是指, 通过部署具有一定感知、 计算、 执行和通信能力的各种 设备, 获取物理世界的信息, 并通过网络实现信息传输、 协同和处理, 从 而实现人与物、 物与物的互联的网络。 简而言之, 物联网就是要实现人与 物、 物与物的互联互通。 物联网的应用包括智能电网、 智能农业、 智能交 通以及环境检测等各个方面。 D2D ( Device-to-Device , 设备对设备)通信, 作为物联网应用的一种, 主要是实现两个设备之间的直接通信。 D2D通信 涉及的技术包括: WPAN ( Wireless Personal Area Network Communication Technologies ,无线个人局域网通信技术)、 UWB ( Ultra Wideband ,超宽带)、 蓝牙 (Bluetooth ), Wifi (无线宽带) 等短距无线通信技术。
为加强移动运营商在物联网领域的控制权, 已经有相关公司开展了在 运营商的授权频段支持 D2D应用的研究, 并积极推动在知名标准组织 3GPP 立项, 目的是使用运营商的授权频段来支持和实现 D2D应用。 在运营商授 权频段实现 D2D通信, 首要解决的问题就是, 在不影响现有蜂窝通信的情 况下, 如何进行设备发现、 资源协商和资源分配。 现有 UWB系统提供一种 设备发现的方法, 因为 UWB是一种完全分布式系统, 所以 UWB设备之间通 过定期在超帧中发送信标帧来实现设备发现和资源协商。 其中, 一个 UWB 超帧, 长度为 65536 s , 由 256个 MAS ( Medium Access Slot, 媒介接入时隙) 组成, 每个 MAS长度为 256μδ。 每个 UWB超帧的开头都是一个 BP (信标周 期, beacon period ) ,每个信标周期可以包括若干个信标时隙( beacon slot ) , 信标时隙的长度可以为 85μδ , 而 BP的最大长度可以为 96个信标时隙。 基于上述设备发现方法, 现有技术中的资源分配方式包括: 一种是预 留资源的方式, 就是为之预留资源的设备在预留资源内可以发送信息; 另 外一种就是竟争方式, 即是在 BP和上述预留资源外, 釆用竟争方式发送信 息。
因为设备在进行发现时, 没有考虑发送信标帧的可用资源问题, 在现 有的蜂窝通信的资源上任意发送信标帧, 这就会对已有的蜂窝通信造成干 扰, 即便设备能够实现发现, 但是也无法得知相互之间的资源预留情况, 这就会导致设备在发现之后进行竟争资源占用, 或者进行复杂的预留资源 协商过程, 直接应用到蜂窝通信环境中时效率较低; 进一步的, 如果信标 帧中包含直接关于某个 MAS的预留信息, 那么, 就有可能存在资源预留冲 突, 而需要进行复杂的冲突处理过程, 也会导致设备之间资源协商的效率 相对较低。
发明内容
本发明实施例提供一种 D2D通信中的资源协商方法及设备, 以通过对资 源协商过程的改进, 提升 D2D通信中设备之间资源协商的效率。
为解决上述技术问题, 本发明实施例提供了一种 D2D通信中的资源协商 方法, 该方法包括:
所述当前设备接收其他设备在当前超帧发送的资源需求信息, 所述资 源需求信息包括所述其他设备的业务优先级、 所述其他设备信标所在的信 标时隙和 /或所述其他设备申请资源的数量;
所述当前设备依据所述其他设备的业务优先级、 所述其他设备信标所 在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述当前设备能够 分配到的资源位置。
本发明实施例还提供了一种 D2D通信中的设备, 该设备包括: 第一接收模块, 用于接收其他设备在当前超帧发送的资源需求信息, 所述资源需求信息包括所述其他设备的业务优先级、 所述其他设备信标所 在的信标时隙和 /或所述其他设备申请资源的数量;
计算模块, 用于依据所述其他设备的业务优先级、 所述其他设备信标 所在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述设备能够分 配到的资源位置。
本发明实施例具有以下优点:
本发明实施例进行设备之间进行资源协商时,通过设备的业务优先级、 信标所在的信标时隙和 /或设备申请资源的数量等资源需求信息, 可以计算 出每个设备自身能够分配到的资源位置, 这样每个设备都在自己能够分配 到的资源位置上发送信息, 就使得资源协商效率都得到提升, 进而也能够 提高发送信息的效率。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或 现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的 附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创 造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1是本发明的设备发现方法实施例 1的流程图;
图 2是本发明的设备发现方法实施例 2的流程图;
图 3是本发明的资源协商方法实施例的流程图;
图 4是图 3所示的流程图中步骤 301的流程图;
图 5是本发明的信息发送方法实施例的流程图;
图 6是本发明的一种设备实施例 1的结构示意图;
图 7是的图 6所示的实施例中发现模块 602的结构示意图;
图 8是本发明的一种设备实施例 2的结构示意图;
图 9是本发明的另一种设备实施例的结构示意图;
图 10是图 9所示的设备实施例中计算模块 902的结构示意图;
图 11是本发明的又一种设备实施例的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进 行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的 范围。
在本发明实施例中, 与现有技术不同的是本发明实施例中的设备, 首 先从蜂窝通信的基站或者别的设备获取信标帧可用资源的操作, 以及本发 明实施例中使用的信标帧包括的内容, 本发明实施例中的信标帧除了包括 信标发送设备标识、 信标接收设备标识和信标时隙编号之外, 还包括如下 字段中的一种或几种: 信标帧类型标识、 主从通信设备标识、 信标帧可用 资源位置、 业务类型、 通信对端设备标识、 所申请资源数量和信息发送的 位置。 其中, 信标帧中包括哪些字段可以根据参与 D2D通信的设备是进行 互相发现、 进行资源协商还是进行信息发送而有所不同。 D2D通信的设备 通过运营商的授权频段进行通信。
其中, 信标帧类型标识: 可以标识信标帧的类型, 可以为 "设备发现 信标帧"、 "资源申请信标帧" 和 "信息发送知会信标帧" 等。 其中, 参与 D2D通信的设备可以发送上述设备发现信标帧来实现其它设备对于信标帧 发送设备的发现, 或者对于其它指定设备的发现, 而资源申请信标帧则可 以用于发现设备之后, 当需要发送信息时发送该信标帧来协商可用资源, 同时, 信息发送知会信标帧则可以用来指示当前超帧中有信息发送, 指示 接收设备在对应的资源位置上接收信息。 可见不同的信标帧类型包含不同 的信息内容, 也能满足实际应用中不同的功能需求。
需要说明的是, 资源申请是在设备成功发现之后进行的, 但是, 设备 在接收到资源申请信标帧时也是可以实现设备发现的, 其中包括对指定设 备的发现; 同样, 信息发送知会信标帧是在资源申请成功的基础上进行的, 但是设备在接收到资源申请信标帧时也可以实现设备发现或者资源协商。
主从通信设备标识: 用来标识发送信标帧的设备是主设备还是从设备。 D2D通信双方, 无论是否与基站失去连接, 只要以主从方式进行通信, 处 于主地位的设备为主设备, 处于从地位的设备为从设备。 如果不以主从方 式进行通信, D2D通信双方地位平等, 则不区分主从设备。 其中, 主设备 可以从蜂窝通信的基站侧或者其它主设备侧获取发送信标帧的可用资源位 置信息, 也可以自己定义信标帧可用资源位置信息, 并可以根据需要把上 述获取的、 或者定义的信标帧可用资源位置信息发送给从设备; 从设备可 以从蜂窝通信的基站侧或者主设备侧获取信标帧可用资源位置信息, 而不 能自己定义信标帧可用资源位置信息。 主从设备在发送信标帧之前, 都需 要获取信标帧可用资源位置信息。
其中, 在下述三种场景下, 主从设备的定义标准可以为: ( 1 )、 所有 D2D设备都能与蜂窝通信网基站连接的情况下, 所有设备都可以从蜂窝通 信基站侧获取信标帧可用资源位置信息, 可以以是否选择主从式通信、 以 及在主从式通信中的主从地位, 确定设备是主设备还是从设备; (2 )、 在有 部分 D2D设备与基站失去连接的情况下, 与基站失去连接的设备可以是从 设备, 其它设备可以根据是否选择主从式通信模式, 以及在主从通信模式 中的主从地位, 来确定主设备还是从设备; (3 )、 在所有 D2D通信的设备 都与基站失去连接的情况下, 可以按照一定的规则, 选择部分设备作为主 设备, 比如选择信标时隙为 0、 1或者其它时隙的设备作为主设备, 并将剩 余时隙对应的设备作为从设备。 需要说明的是, 除非经过预先设定, 一个 参与 D2D通信的设备默认情况下为主设备;
信标帧可用资源位置: 可以以位图 (bitmap ) 的形式示意出可以发送 信标帧的资源位置;
业务类型: 用来标识信标发送设备要求的业务类型, 可以表示当前设 备在进行哪一种业务类型, 比如语音业务, 视频业务, 抄表业务等。 需要 说明的是, 设备的业务类型可以预先定义优先级。
通信对端设备标识: 用来唯一标识通信对端设备, 该通信对端设备标 识根据信标帧的类型, 设置不同的通信对端设备的标识;
所申请资源数量: 表示信标帧的发送设备在下一超帧中申请的资源数 量。 需要说明的是, 为公平起见, 可以限定每个超帧周期内, 每个设备申 请的资源的数量, 以为其它设备在同一个超帧中申请资源保留机会;
信息发送的位置: 指示当前超帧中, 信息发送所使用的资源位置。 需要说明的是, 上述字段, 并不一定会在每个类型的信标帧中都全部 包含, 可以根据功能需要进行取舍。 信标帧所包括的内容可以根据 "信标 帧类型标识" 字段确定。
则本发明实施例在实际应用中, 把可用资源定义为 "超帧周期", 并把 一个 "超帧周期" 划分成 "信标周期" 和 "数据周期", 参与 D2D通信的 设备可以在 "信标周期" 内发送各种类型的信标帧, 在 "数据周期" 内发 送信息。 其中, "超帧周期" 并不局限于时域上的一段时间, 也可以是一段 时间和 /或一段频段上的所有可用资源。 比如, 可以是 LTE ( Long Term Evolution, 长期演进) 系统中的一个子帧中的所有可用时频资源块; 同样, "信标周期" 和 "数据周期" 也不局限于时域上的一段时间, 也可以是频 域上的一段频段。 "信标周期" 又划分成若干 "信标时隙", 比如, 可以是 LTE系统中相对 "信标周期" 更小的一块时频资源。
参考图 1 , 在本发明一个实施例中, 实现本发明实施例所提供的设备 发现方法的一种实施例, 可以包括以下步骤:
步骤 101 : 接收设备接收其他 D2D设备发送的第一设备发现信标帧, 所述第一设备发现信标帧的参数包括: 第一通信对端设备标识; 所述第一 通信对端设备标识不为空时表示信标帧发送设备在参与所述接收设备的设 备发现过程, 不为空的通信对端设备标识即为所述接收设备的标识。
在本发明实施例中, 如果其他 D2D设备向当前设备发送了设备发现信 标帧, 而该设备发现信标帧的参数至少可以包括: 通信对端设备标识; 通 信对端设备标识不为空时表示所述其他设备在参与所述当前设备的设备发 现过程, 不为空的所述第一通信对端设备标识为所述当前设备的标识。 在 本步骤中, 当该通信对端设备标识指示出了所述接收设备的标识时, 就能 够实现对指定设备 (即是接收设备) 的发现, 或者能够实现对于接收设备 之前发送的指定设备发现请求的响应。
在实际应用中, 所述设备发现信标帧还可以包括主从通信设备标识, 所述主动通信设备标识可以表示发送设备发现信标帧的设备是主设备还是 从设备。 设备发现过程因为设备发现信标帧所包括的字段不同, 也可以分 为第一设备发现子过程和第二设备发现子过程。在第一设备发现子过程中, 发送设备发现信标帧 1 (为了方便区分, 将在第一设备发现子过程中发送 的设备发现信标帧定义为设备发现信标帧 1 , 而将第二设备发现子过程中 发送的设备发现信标帧定义为设备发现信标帧 2 ) 的其他设备为主设备, 在这种情况下所述设备发现信标帧 1 具体可以包括: 信标帧类型标识、 主 从通信设备标识、 信标帧可用资源位置、 通信对端设备标识和业务类型; 其中, 信标帧类型标识指示当前信标帧为设备发现信标帧 1 , 也即, 当前 参与的设备发现过程为第一设备发现子过程; 主从通信设备标识则指示为 主设备; 信标帧可用资源位置可以以 bitmap形式指示可以发送信标帧的资 源; 而对于通信对端设备标识来讲: 如果指示发现目标设备, 或者针对别 的设备发现请求的响应, 那么, 该字段设置为待发现的目标设备的标识, 或者发送所述发现请求的设备的标识; 否则, 通信对端设备标识为空; 业 务类型: 指示发送设备发现信标帧的其他设备所要求的业务类型。
而在主设备发送所述设备发现信标帧 1 的情况下, 如果网络中没有从 设备存在, 即: 在网络中没有监听到 "主从通信设备标识" 字段指示为从 设备的信标帧, 或者, 网络中没有需要从其它主设备获取信标帧位置信息 的主设备存在时, 则可以选定主设备定期发送该信标帧; 如果网络中有从 设备存在, 即, 在网络中监听到 "主从通信设备标识" 字段指示为从设备 的信标帧, 或者网络中有需要从其它主设备获取信标帧位置信息的主设备 存在时, 选定主设备持续发送该信标帧。 上述 "选定主设备", 可以根据既 定规则选取。 比如, 网络中存在多个主设备时, 可以选择信标时隙编号较 小或者较大的主设备; 网络中不存在主设备时, 设备可以以志愿的方式, 或者, 约定由某些设备(比如信标时隙较小或者较大的设备) 进行角色变 化, 转换成主设备, 然后从变换后的主设备中, 选择设备作为 "选定主设 备,,。
在第二设备发现子过程中, 其他设备发送的 "设备发现信标帧 2" 具 体包括的字段有: 信标帧类型标识、 主从通信设备标识、 通信对端设备标 识和业务类型。 其中, 该信标帧类型标识指示为当前信标帧为设备发现信 标帧 2 , 也即, 当前参与的设备发现过程为第二设备发现子过程; 主从通 信设备标识则根据发送信标帧的设备是从设备还是主设备设定; 而对于通 信对端设备标识来讲: 如果指示发现目标, 或者针对其它设备的发现请求 的响应, 那么, 该字段设置为发现目标设备的标识, 或者发送发现请求的 该设备的标识; 否则, 该标识设置为空; 业务类型则设置为指示信标发送 设备要求的业务类型。
在第二设备发现子过程中,设备发现信标帧 2主要由从设备进行发送, 使别的设备能够对其进行发现, 或者发现指定设备。 而对于主设备, 在第 一设备发现子过程中被选定需要定期或者持续发送设备发现信标帧 1 的主 设备, 也可以在发送 "设备发现信标帧 之外, 发送该设备发现信标帧 2; 而未被选定发送 "设备发现信标帧 1 " 的主设备, 可以持续发送该设备发 现信标帧 2。
步骤 102: 接收设备依据所述第一设备发现信标帧中的第一通信对端 设备标识实现对所述其他设备的发现。
针对于前述的接收设备, 不管是接收到设备发现信标帧 1还是设备发 具体的,在所述设备发现信标帧中的通信对端标识为空的情况下, 所述接 收设备通过接收所述设备发现信标帧就实现了对所述发送设备的发现。而如 果通信对端标识不为空, 接收设备就需要判断自己是否曾经向所述其他设 备发送过设备发现信标帧, 如果否, 则所述接收设备向所述其他设备返回 设备发现信标帧, 用于响应信标帧发送设备的指示发现目标的设备发现请 求, 其中, 所述返回的设备发现信标帧中的通信对端设备标识为所述其他 设备的标识; 如果是, 则接收设备直接依据所述设备发现信标帧实现对所 述其他设备的发现, 即是该接收到的信标帧是对于接收设备之前发送的信 标帧的响应, 就完成了自己之前发起的指示发现目标的设备发现过程。
对于接收设备是从设备, 或者接收设备是需要从其它主设备获取信标 帧可用资源位置信息的主设备来讲, 接收设备也可以根据该信标帧携带的 "信标帧可用资源位置" 信息, 获取可以发送信标帧的资源位置, 然后根 据监听的其它设备发送的信标帧信息, 选择一个空闲时隙, 在信标帧可用 资源中未被使用的资源上, 发送自己的设备发现信标帧, 从而能够让别的 设备发现自己。
需要说明的是, 对于上述设备发现过程中的指定了发现目标设备(即 是通信对端标识字段所表示的通信对端) 的设备发现过程而言, 发送设备 发现请求的设备 Drequest, 需要监听到发现目标设备 Dresponse发送的相应 的设备发现信标帧作为响应, 才完成整个发现过程。 在实际应用中也可以 设定, 如果设备 Drequest尝试发送若干次针对设备 Dresponse的特定设备发 现信标帧之后, 或者在某次特定设备发现信标发送之后的若干周期内, 未 接收到所述发现目标设备 Dresponse的响应信标帧, 则认为发现目标设备 Dresponse不在其通信范围内。
在本实施例中, 设备进行发现时发送设备发送信标帧, 还包括了通信 对端设备标识, 该通信对端设备标识为空时能实现任意设备的发现, 不为 空时该通信对端设备标识就指示了指定设备, 当某个接收设备的标识与该 通信对端设备标识相同时, 该接收设备再向发送信标帧的其他设备返回通 信对端设备标识设置为该其他设备标识的设备发现信标帧, 就能够实现指 定设备的发现过程, 也为下一步的资源协商过程可以节省出时间, 从而在 后续进行资源协商时提高效率。 参考图 2 , 在本发明一个实施例中, 实现本发明实施例所提供的设备 发现方法的另一种实施例, 可以包括以下步骤:
步骤 201 : 发送设备获取信标帧可用资源位置信息和超帧周期信息, 并 至少扫描一个信标周期, 在所述信标周期内扫描到至少一个信标帧的情况 下, 进入步骤 202 , 在所述信标周期内没有扫描到信标帧的情况下, 进入步 骤 203。
步骤 202: 在所述信标周期中选择一个空闲的信标时隙, 并在所述信标 时隙上向 D2D通信中的其他设备发送第一设备发现信标帧。
步骤 203 : 在信标周期内任意选择一个信标时隙, 并在所述任意选择的 信标时隙上向 D2D通信中的其他设备发送第二设备发现信标帧。
在本实施例中, 发送设备在发送信标帧之前, 首先获取信标帧可用资 源位置信息和超帧周期信息, 主设备可以从蜂窝通信网络侧或者其它主设 备侧获取信标帧可用资源位置信息, 或者自己定义信标帧可用资源位置信 息, 并根据需要把上述信标帧可用资源位置信息广播给其它设备; 从设备, 可以从蜂窝通信的网络侧或者主设备侧获取信标帧可用资源位置信息。 并 至少扫描一个信标周期以获取现有的信标信息。 如果设备扫描到一个或多 个信标帧,设备在信标周期中选择一个空闲的信标时隙发送自己的信标帧; 否则, 设备可以在信标周期内任意选择一个信标时隙发送自己的信标帧; 每个设备在自己的信标时隙上发送设备自己的信标, 在其它时隙上接收其 它设备发送的信标。
步骤 204: 所述其他设备依据所述第一设备发现信标帧或第二设备发现 信标帧实现与所述发送设备的同步。
如果所述其他设备在接收到第一设备发现信标帧或第二设备发现信标 帧之后, 还未完成与 D2D通信网络的同步, 则除完成对于发送第一或第二 设备发现信标帧的发送设备实现发现之外, 还可以根据该信标帧获得与发 送设备的同步, 比如, 信标帧接收时间为 TRx, 信标帧时隙编号为 SN, 信 标时隙长度为 TS , 那么, 可以计算信标周期的开始时间就为: T=TRx-TS XSN。
在实际应用中, 需要同步的不一定只是从设备, 主设备如果不能与蜂 窝网络同步, 并且自己又没有定义自己的超帧周期的话, 就需要与现有的 超帧周期同步。 两个主设备也可以进行通信。
步骤 205 : 所述其他设备依据所述第一设备发现信标帧或第二设备发 现信标帧实现对所述其他设备的发现。
所述其他设备再依据接收到的第一设备发现信标帧或第二设备发现信 标帧对发送设备进行发现。 具体的发现过程在实施例 1 中已经详细介绍, 在此不再赘述。
步骤 206: 在所述第一或第二设备发现信标帧的参数还包括信标帧可 用资源位置的情况下, 所述信标帧可用资源位置用于指示当前可以发送信 标帧的资源; 所述其他设备依据所述第一设备发现信标帧, 获取可以发送 第三设备发现信标帧的信标帧可用资源位置。
在本实施例中, 所述第一或者第二设备发现信标帧中的参数还包括信 标帧可用资源位置的情况下, 所述信标帧可用资源位置可以指示当前可以 发送信标帧的资源,。
需要说明的是, 在存在从设备的场景下, 如果主设备能够与基站连接, 那么发送设备发现信标帧的主设备就可以从基站侧获取信标帧可用资源位 置; 如果主设备不能与基站连接, 那么主设备或者从别的主设备侧获取信 标帧可用资源位置信息, 或者自己设置信标帧可用资源位置。 主设备根据 需要把信标帧可用资源位置发送给其它主设备或者从设备; 从设备基于主 设备发送的信标帧可用资源位置, 完成同步和可用资源选择。
步骤 207:接收设备在信标帧可用资源中未被使用的资源位置上返回第 三设备发现信标帧。
接收设备可以在信标帧可用资源中未被使用的资源位置上返回第三设 备发现信标帧, 以实现所述其他设备对所述当前设备的发现, 其中, 所述 第三设备发现信标帧中的第二通信对端设备标识为所述其他设备的标识。 另外, 在本实施例中如果接收设备为从设备, 或者需要从其它主设备 获取信标帧可用资源位置信息的主设备, 接收设备也可以根据 "信标帧可 用资源位置" 信息, 获取可以发送信标帧的资源位置, 然后再根据监听的 其它设备发送的信标帧信息, 选择一个空闲时隙, 在信标帧可用资源中未 被使用的资源上, 发送自己的信标帧, 从而能够让其它设备能够发现自己。
本实施例中, 当前设备在发送设备发现信标帧之前先进行扫描, 并且 能够实现与其他设备的同步, 以及还可以在实现对其他设备进行发现的基 础上, 向其他设备发送设备发现信标帧以实现其他设备对自己的发现。
参考图 3 , 在本发明一个实施例中, 实现本发明实施例所提供的资源 协商方法, 可以包括以下步骤: 步骤 301 : 当前设备接收其他设备在当前超帧发送的资源需求信息, 所述资源需求信息包括所述其他设备的业务优先级、 所述其他设备信标所 在的信标时隙和 /或所述其他设备申请资源的数量。
本实施例可以应用于参与物联网 D2D通信的已经互相发现的当前设备 和其他设备上, 当前设备在接收到的其他设备发送的信标帧并获取资源需 求信息之后, 就可以根据其中的其他设备的业务优先级、 和 /或其他设备信 标所在的信标时隙和 /或其他设备申请资源的数量计算自己能够发送信息 的资源位置。
步骤 302: 当前设备依据其他设备的业务优先级、 所述其他设备信标 所在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述当前设备能 够分配到的资源位置。
已经完成设备发现的当前设备和其他设备需要进行通信时, 可以通过 约定的方式进行资源协商, 参考图 4所示, 所述步骤 302 , 具体可以包括: 步骤 401 : 当前设备按照所述其他设备的业务优先级、 和 /或所述其他 设备信标所在的信标时隙和 /或所述其他设备申请资源的数量对有资源申 请需求的的设备进行排序; 所述有资源申请需求的的设备包括所述当前设 备和所述其他设备;
其中, Dsender为信息发送设备, Drece而为信息接收设备, 有信息发送需 求的所有的 Dsender设备, 在获取到资源需求信息之后, 根据如下规则进行资 源协商:
Dsender设备监听到所有信标之后, 获取自己和相邻设备的资源需求信 息, 然后, 对资源需求信息按照业务优先级从高到低、 请求设备信标所在 的信标时隙从大到小 (或者从小到大)、 所申请资源的数量从大到小 (或者 从小到大)排序, 然后对下一超帧的 "数据周期" 中的可用资源进行分配, 并计算自身可以分配到的资源的位置。 例如, 所有资源需求信息中, 业务 优先级较高的需求, 优先获得资源分配; 在同等业务优先级情况下, 信标 时隙较小 (大) 的需求优先获得资源分配; 或者, 在同等业务优先级情况 下, 资源申请数量较大(小) 的需求优先获得资源分配。 那么, Dsender按照 上述优先级对申请资源的设备进行排序, 比如排序结果为: D1 D2
DSender Dn-1 , Dn, 相应的所申请的资源分别为: R 、 R2 Rsender Rn-1、 Rn。 需要说明的是, 所述当前设备可以通过接收包括所申请资源的数量的 资源申请信标帧, 或者通过接收包括所申请资源的数量的信息发送知会信 标帧的方式, 获取所述资源需求信息中的所述其他设备申请资源的数量。
步骤 402: 按照所述排序的结果计算所述当前设备能够分配到的资源。 根据在步骤 401中的排序结果, 可以得知 Dsender的可以占用的资源就是
(∑ +1)
从 '=1 开始的 Rsender个资源, s即是排序的序号。
可以理解的是, 如果设备通过计算, 发现自己在一个超帧的 "数据周 期" 中能够分得所申请的资源, 则在下一超帧的信标帧中包含申请到的资 源的位置; 否则, 设备继续在下一超帧的 "信标周期" 中继续发送 "资源 请求信标帧", 继续申请资源。 为公平起见, 可以设定一个周期, 使得资源分配的优先级以业务优先 级从小到大为顺序进行分配, 信标时隙和所申请资源的数量, 也可以以一 定的周期为参考进行资源分配优先级从小到大或者从大到小的变换, 或者 信标时隙的优先级可以以循环移位的方式进行, 比如有 N个信标时隙, 第一 次以 "N-l、 N-2 1、 0" 为优先级顺序, 第二次以 "N-2 1、 0、
N-1 " 为优先级顺序, 依次循环下去。
本实施例中的资源申请过程也可以根据发送的资源申请信标帧的不同 而分为第一资源申请子过程和第二资源申请子过程, 在第一资源申请子过 程中, 所发送的 "第一资源申请信标帧" 包含信标帧类型标识、 主从通信 设备标识、 信标帧可用资源位置、 通信对端设备标识、 业务类型和所申请 资源数量; 其中, 信标帧类型标识: 用于指示为 "第一资源申请信标帧"; 主从通信设备标识则根据当前设备是从设备还是主设备设定; 信标帧可用 资源位置则以 bitmap形式指示可以发送信标帧的资源; 通信对端设备标识 则指示申请资源进行通信的对端设备的标识; 业务类型: 指示信标发送设 备(当前设备)要求的业务类型; 所申请资源数量用于指示申请的资源数 量。
该第一资源申请信标帧可以由需要发送 "设备发现信标帧 1 " 的 "选定 主设备", 在需要进行资源申请时发送, 以进行资源申请。
相应的, 第二资源申请子过程则发送 "第二资源申请信标帧", 包括信 标帧类型标识、 主从通信设备标识、 通信对端设备标识、 业务类型和所申 请资源数量; 其中, 信标帧类型标识指示为 "第二资源申请信标帧"; 主从 通信设备标识则根据当前设备是从设备还是主设备设定; 通信对端设备标 识则指示申请资源进行通信的对端设备的标识; 业务类型则指示信标发送 设备要求的业务类型; 所申请资源数量用于指示申请的资源数量。
该第二资源申请信标帧可以由需要发送 "设备发现信标帧 1 " 的 "选定 主设备", 在需要进行资源申请时, 且在不需要发送 "设备发现信标帧 时, 发送该第二资源申请信标帧进行资源申请; 上述 "选定主设备" 之外 的主设备, 以及从设备, 在需要进行资源申请时, 可以发送该第二资源申 请信标帧进行资源申请。
需要说明的是, 本实施例中所发送的资源申请信标帧申请的是下一个 超帧中的资源。也即发送资源申请信标帧的设备在当前超帧中通过发送 "资 源申请信标帧" 来申请资源, 而在下一个超帧中使用申请的资源 (如果资 源申请成功的话) 发送信息, 而如果设备没有申请到资源, 下一超帧则会 继续申请资源。
在本实施例中, 通过在已经实现发现的两个设备上进行资源申请的协 商, 可以简化设备在发现之后的资源协商过程, 并且因为各个设备都是基 于自己及其他设备的资源申请情况进行的资源协商, 所以可以提高设备之 间资源协商的效率。 参考图 5 , 在本发明一个实施例中, 实现本发明实施例所提供的信息 发送方法, 可以包括以下步骤: 步骤 501 : 所述当前设备接收其他设备在当前超帧发送的资源需求信 息, 所述资源需求信息包括所述其他设备的业务优先级、 所述其他设备信 标所在的信标时隙和 /或所述其他设备申请资源的数量;
本实施例应用于参与物联网 D2D通信的已经互相发现的当前设备和其 他设备上, 所述当前设备即为需要发送信息的那个设备。
步骤 502: 所述当前设备依据所述其他设备的业务优先级、 所述其他设 备信标所在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述当前 设备能够分配到的资源位置;
步骤 503 : 在所述当前超帧的下一个超帧中, 所述当前设备向所述其他 设备发送信息发送知会信标帧, 所述信息发送知会信标帧包括信息发送的 位置, 所述信息发送的位置用于指示所述当前设备当前使用的资源位置。
在所述当前设备资源申请成功之后, 该当前设备就可以在申请的资源 上发送信息。 该信息发送过程也因为信息发送知会信标帧的不同, 而分为 第一信息发送子过程和第二信息发送子过程, 其中, 信息发送知会信标帧 用来通知接收设备当前超帧中有信息发送。
在所述第一信息发送子过程中,发送的第一信息发送知会信标帧包括: 信标帧类型标识、 主从通信设备标识、 信标帧可用资源位置、 通信对端设 备标识、 业务类型、 所申请资源数量和信息发送的位置; 其中, 信标帧类 型标识指示为 "第一信息发送知会信标帧"; 主从通信设备标识则根据设备 是从设备还是主设备设定; 信标帧可用资源位置可以 bitmap形式指示可以 发送信标帧的资源; 通信对端设备标识则指示信息接收设备的标识; 业务 类型则指示信标发送设备要求的业务类型; 所申请资源数量: 如果信息发 送设备信息未发送完毕, 该字段设置为信息发送设备继续申请的资源的数 量。 否则, 如果信息发送设备信息发送完毕, 该字段置空, 表明下一超帧 信息发送设备不再申请资源; 信息发送的位置则指示信息发送所使用的资 源的起始位置。
上述第一信息发送知会信标帧由需要发送 "设备发现信标帧 的 "选 定主设备", 在需要进行信息发送知会时发送, 用来进行信息发送知会。
在上述第二信息发送子过程中, 发送的 "第二信息发送知会信标帧" 包括: 信标帧类型标识、 主从通信设备标识、 通信对端设备标识、 业务类 型、 所申请资源数量和信息发送的位置; 其中, 信标帧类型标识指示为 "第 二信息发送知会信标帧 "; 主从通信设备标识则根据发送设备是从设备还是 主设备设定; 通信对端设备标识则指示信息接收设备的标识; 业务类型则 指示信标发送设备要求的业务类型; 所申请资源数量: 如果信息发送设备 信息未发送完毕, 该字段设置为信息发送设备继续申请的资源的数量。 否 则, 如果信息发送设备信息发送完毕, 该字段置空, 表明下一超帧信息发 送设备不再申请资源; 信息发送的位置则指示信息发送当前所使用的资源 的位置。
上述第二信息发送知会信标帧由需要发送 "设备发现信标帧 的 "选 定主设备", 在需要进行信息发送知会时, 且在不需要发送 "设备发现信标 帧 时, 发送该第二信息发送知会信标帧进行信息发送知会; 上述 "选定 主设备" 之外的主设备, 以及从设备, 在需要进行信息发送知会时, 发送 该第二信息发送知会信标帧进行信息发送知会。
所述其他设备可以在所述当前使用的资源位置上接收信息。 对于接收 信息发送知会信标帧的接收设备 Dreeeiver来讲, 在一个超帧的信标周期内完 成所有信标接收后, 如果接收到 "通信对端设备标识" 设置为自身的标识 的 "信息发送知会信标帧", 则在该信息发送知会信标帧中的 "信息发送的 位置" 项指示的 "数据周期" 的资源上去接收信息。 当然, 接收设备也可 以在接收到 "通信对端设备标识"设置为自身的标识的 "资源申请信标帧" 后, 做必要的准备, 以便为在下一超帧中更好的接收信息。
本实施例所述的信息发送方法基于资源协商进行, 可以很好的解决现 有技术中设备之间竟争资源导致的信息发送效率较低的问题, 并且因为前 述的资源协商基于设备自身所申请的资源进行, 也能够使得信息发送过程 相对简单, 提高了设备之间信息发送的效率。
需要说明的是, 对于前述的各方法实施例, 为了简单描述, 故将其都 表述为一系列的动作组合, 但是本领域技术人员应该知悉, 本发明并不受 所描述的动作顺序的限制, 因为依据本发明, 某些步骤可以釆用其他顺序 或者同时进行。 其次, 本领域技术人员也应该知悉, 说明书中所描述的实 施例均属于优选实施例,所涉及的动作和模块并不一定是本发明所必须的。 与上述本发明实施例所提供的设备发现方法相对应, 参见图 6 , 本发 明实施例还提供了一种设备实施例的结构示意图,所述设备具体可以包括: 第二接收模块 601 , 用于接收参与所述 D2D通信的其他设备发送的第一 设备发现信标帧, 所述第一设备发现信标帧的参数包括: 第一通信对端设 备标识; 所述第一通信对端设备标识不为空时表示所述其他设备在参与所 述接收设备的设备发现过程, 不为空的所述第一通信对端设备标识为所述 接收设备的标识; 以及
发现模块 602 ,用于依据所述第一设备发现信标帧中的第一通信对端设 备标识实现对所述其他设备的发现。
在所述主从通信设备标识为空的情况下,所述发现模块 602具体可以用 于: 通过接收所述第一设备发现信标帧实现对所述其他设备的发现。
在实际应用中, 所述发现模块 602可以包括:
判断子模块 701 ,用于判断是否曾经向所述其他设备发送过第二设备发 现信标帧;
返回子模块 702 , 用于在所述判断模块的结果为否的情况下, 向所述其 他设备返回第三设备发现信标帧, 以实现所述其他设备对所述接收设备的 发现, 其中, 所述第三设备发现信标帧中的第二通信对端设备标识为所述 其他设备的标识; 发现子模块 703 , 用于在所述判断模块的结果为是的情况下, 直接依据 所述第一设备发现信标帧实现对所述其他设备的发现。
本实施例所述的设备进行发现时发送的设备发送信标帧, 还包括了主 从通信设备标识和通信对端设备标识, 用于表示当前进行设备发现的设备 是主设备和从设备, 以及通过通信对端设备标识的设置也能够直接进行设 备发现过程, 因此与现有技术中的设备发现方法, 为下一步的资源协商过 程可以节省出时间, 从而在后续进行资源协商时提高效率。
参考图 8所示,为与设备发现方法相对应的设备实施例 2的结构示意图, 本实施例所述的设备具体可以包括:
扫描模块 801 , 用于至少扫描一个信标周期。
第一选择模块 802 , 用于在扫描到信标周期的情况下, 在所述信标周期 中选择一个空闲的信标时隙。
第二选择模块 803 , 用于在没有扫描到所述信标周期的情况下, 在所述 信标周期内任意选择一个信标时隙。
发送信标帧模块 804 ,用于在所述信标时隙上向当前物联网中的其他设 备发送设备发现信标帧; 或者, 在所述任意选择的信标时隙上向当前物联 网中的其他设备发送设备发现信标帧。
第二接收模块 601 , 用于接收参与所述 D2D通信的其他设备发送的第一 设备发现信标帧, 所述第一设备发现信标帧的参数包括: 第一通信对端设 备标识; 所述第一通信对端设备标识不为空时表示所述其他设备在参与所 述接收设备的设备发现过程, 不为空的所述第一通信对端设备标识为所述 接收设备的标识。
发现模块 602 ,用于依据所述第一设备发现信标帧中的第一通信对端设 备标识实现对所述其他设备的发现。
在所述接收设备为从设备, 且所述从设备未完成与当前 D2D的同步的 情况下, 还可以包括:
同步模块 805 ,用于依据所述设备发现信标帧实现与所述其他设备的同 步。
在所述设备发现信标帧的参数还包括信标帧可用资源位置的情况下, 所述信标帧可用资源位置用于指示当前可以发送信标帧的资源; 则所述返 回子模块可以包括:
获取资源位置子模块 806 ,用于依据监听的其他设备发送的第一设备发 现信标帧, 获取可以发送第三设备发现信标帧的信标帧可用资源的位置; 发送子模块 807 , 用于在信标帧可用资源中未被使用的资源位置上, 选 择空闲时隙发送所述第三设备发现信标帧。
在本实施例中, 当前设备在发送设备发现信标帧之前先进行扫描, 并 且能够实现与其他设备的同步, 以及还可以在实现对其他设备进行发现的 基础上, 向其他设备发送设备发现信标帧以实现其他设备对自己的发现。 与已经互相发现的设备之间进行的资源申请方法相对应, 参考图 9所 示, 本发明实施例还提供了另一种设备的结构示意图, 该设备为参与物联 网 D2D通信已经发现其他设备的当前设备, 具体可以包括:
第一接收模块 901 ,用于接收已经发现的其他设备在当前超帧发送的资 源需求信息, 所述资源需求信息包括所述其他设备的业务优先级、 所述其 他设备信标所在的信标时隙和 /或所述其他设备申请资源的数量;
其中, 所述第一接收模块 901 , 具体可以包括: 接收子模块, 用于接收 资源申请信标帧或信息发送知会信标帧; 获取资源数量子模块, 用于从所 述资源申请信标帧或信息发送知会信标帧中获取所述资源需求信息中所述 其他设备申请资源的数量。
计算模块 902 , 用于依据所述其他设备的业务优先级、 所述其他设备信 标所在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述设备能够 分配到的资源位置。
所述计算模块 902具体可以通过接收包括所申请资源的数量的资源申 请信标帧,或者通过接收包括所申请资源的数量的信息发送信标帧的方式, 获取所述资源需求信息中的所申请资源的数量。
在实际应用中, 所述计算模块 902可以包括:
排序子模块 1001 , 用于按照所述其他设备的业务优先级、 和 /或所述其 他设备信标所在的信标时隙和 /或所述其他设备申请资源的数量对有资源 申请需求的设备进行排序; 所述有资源申请需求的设备包括所述当前设备 和所述其他设备。 计算子模块 1002 , 用于按照所述排序的结果计算所述当前设备能够分 配到的资源。
在本实施例中, 因为当前设备基于自己及相邻设备的资源申请情况进 行的资源协商, 所以在资源申请过程中不会与其他设备产生冲突, 可以提 高设备之间资源协商的效率。
与前述的在已经发现的设备之间进行的信息发送方法相对应, 参考图 11 , 本发明实施例还提供了又一种设备实施例的结构示意图, 具体可以包 括:
第一接收模块 901 ,用于接收已经发现的其他设备在当前超帧发送的资 源需求信息, 所述资源需求信息包括所述其他设备的业务优先级、 所述其 他设备信标所在的信标时隙和 /或所述其他设备申请资源的数量;
计算模块 902 , 用于依据所述其他设备的业务优先级、 所述其他设备信 标所在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述设备能够 分配到的资源位置。
发送模块 1101 , 用于在所述当前超帧的下一个超帧中, 向所述其他设 备发送信息发送知会信标帧, 所述信息发送知会信标帧包括信息发送的位 置, 所述信息发送的位置用于指示所述当前设备当前使用的资源位置。
本实施例所述的设备基于前述的资源协商进行信息发送, 可以很好的 解决现有技术中设备之间竟争资源导致的信息发送效率较低的问题, 并且 因为前述的资源协商基于设备自身所申请的资源进行, 也能够使得信息发 送过程相对简单, 提高了设备之间信息发送的效率。 个实施例重点说明的都是与其他实施例的不同之处, 各个实施例之间相同 相似的部分互相参见即可。 对于设备类实施例而言, 由于其与方法实施例 基本相似, 所以描述的比较简单, 相关之处参见方法实施例的部分说明即 可。
还需要说明的是, 在本文中, 术语 "包括"、 "包含" 或者其任何其他 变体意在涵盖非排他性的包含, 从而使得包括一系列要素的过程、 方法、 物品或者设备不仅包括那些要素, 而且还包括没有明确列出的其他要素, 或者是还包括为这种过程、 方法、 物品或者设备所固有的要素。 在没有更 多限制的情况下, 由语句 "包括一个 ... ... " 限定的要素, 并不排除在包括 所述要素的过程、 方法、 物品或者设备中还存在另外的相同要素。
以上对本发明实施例所提供的一种 D2D通信中的资源协商方法及设备进 述,以上实施例的说明只是用于帮助理解本发明实施例的方法及其思想;同时, 对于本领域的一般技术人员,依据本发明实施例的思想, 在具体实施方式及应 用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发明的限 制。

Claims

权利要求书
1、 一种 D2D通信中的资源协商方法, 其特征在于, 该方法包括: 所述当前设备接收其他设备在当前超帧发送的资源需求信息, 所述资 源需求信息包括所述其他设备的业务优先级、 所述其他设备信标所在的信 标时隙和 /或所述其他设备申请资源的数量;
所述当前设备依据所述其他设备的业务优先级、 所述其他设备信标所 在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述当前设备能够 分配到的资源位置。
2、 根据权利要求 1所述的方法, 其特征在于, 所述当前设备依据所述 其他设备的业务优先级、 所述其他设备信标所在的信标时隙和 /或所述其他 设备申请资源的数量, 计算所述当前设备能够分配到的资源位置包括: 按照所述其他设备的业务优先级、 所述其他设备信标所在的信标时隙 和 /或所述其他设备申请资源的数量对有资源申请需求的设备进行排序; 所 述有资源申请需求的设备包括所述当前设备和所述其他设备;
按照所述排序的结果计算所述当前设备能够分配到的资源。
3、 根据权利要求 1所述的方法, 其特征在于, 所述当前设备接收其他 设备在当前超帧发送的资源需求信息, 包括:
所述当前设备接收资源申请信标帧或信息发送知会信标帧;
所述当前设备从所述资源申请信标帧或信息发送知会信标帧中获取所 述资源需求信息中所述其他设备申请资源的数量。
4、 根据权利要求 1 _ 3中任一项所述的方法, 其特征在于, 在所述当前 设备接收其他设备在当前超帧发送的资源需求信息前, 所述当前设备通过 如下方式发现所述其他设备:
所述当前设备接收其他设备发送的第一设备发现信标帧, 所述第一设 备发现信标帧的参数包括: 第一通信对端设备标识; 所述第一通信对端设 备标识不为空时表示所述其他设备在参与所述当前设备的设备发现过程, 不为空的所述第一通信对端设备标识为所述当前设备的标识;
所述当前设备依据所述第一设备发现信标帧中的第一通信对端设备标 识实现对所述其他设备的发现。
5、 根据权利要求 4所述的方法, 其特征在于, 所述当前设备依据所述 第一设备发现信标帧中的第一通信对端设备标识实现对所述其他设备的发 现, 包括:
当前设备判断是否曾经向所述其他设备发送过第二设备发现信标帧; 如果否, 则所述当前设备向所述其他设备返回第三设备发现信标帧, 以实现所述其他设备对所述当前设备的发现, 其中, 所述第三设备发现信 标帧中的第二通信对端设备标识为所述其他设备的标识;
如果是, 则所述当前设备依据所述第一设备发现信标帧实现对所述其 他设备的发现。
6、 根据权利要求 5所述的方法, 其特征在于, 所述第一设备发现信标 帧的参数还包括信标帧可用资源位置, 所述信标帧可用资源位置用于指示 当前可以发送信标帧的资源; 则所述当前设备向所述其他设备返回第三设 备发现信标帧包括:
当前设备依据所述第一设备发现信标帧, 获取可以发送第三设备发现 信标帧的信标帧可用资源的位置;
在信标帧可用资源位置中未被使用的资源位置上, 当前设备选择空闲 时隙发送所述第三设备发现信标帧。
7、 根据权利要求 1所述的方法, 其特征在于, 还包括:
在所述当前超帧的下一个超帧中, 所述当前设备向所述其他设备发送 信息发送知会信标帧, 所述信息发送知会信标帧包括信息发送的位置, 所 述信息发送的位置用于指示所述当前设备当前使用的资源位置。
8、 一种 D2D通信中的设备, 其特征在于, 该设备包括:
第一接收模块, 用于接收其他设备在当前超帧发送的资源需求信息, 所述资源需求信息包括所述其他设备的业务优先级、 所述其他设备信标所 在的信标时隙和 /或所述其他设备申请资源的数量;
计算模块, 用于依据所述其他设备的业务优先级、 所述其他设备信标 所在的信标时隙和 /或所述其他设备申请资源的数量, 计算所述设备能够分 配到的资源位置。
9、 根据权利要求 8所述的设备, 其特征在于, 所述计算模块包括: 排序子模块, 用于按照所述其他设备的业务优先级、 所述其他设备信 标所在的信标时隙和 /或所述其他设备申请资源的数量对有资源申请需求 的设备进行排序; 所述有资源申请需求的设备包括所述当前设备和所述其 他设备;
计算子模块, 用于按照所述排序的结果计算所述当前设备能够分配到 的资源。
10、 根据权利要求 8所述的设备, 其特征在于, 所述第一接收模块, 包 括:
接收子模块, 用于接收资源申请信标帧或信息发送知会信标帧; 获取资源数量子模块, 用于从所述资源申请信标帧或信息发送知会信 标帧中获取所述资源需求信息中所述其他设备申请资源的数量。
11、 根据权利要求 8 - 10中任一项所述的设备, 其特征在于, 还包括发 现装置, 所述发现装置包括:
第二接收模块, 用于接收其他设备发送的第一设备发现信标帧, 所述 第一设备发现信标帧的参数包括: 第一通信对端设备标识; 所述第一通信 对端设备标识不为空时表示所述其他设备在参与所述接收设备的设备发现 过程, 不为空的所述第一通信对端设备标识为所述接收设备的标识;
发现模块, 用于依据所述第一设备发现信标帧中的第一通信对端设备 标识实现对所述其他设备的发现。
12、 根据权利要求 11所述的设备, 其特征在于, 所述发现模块包括: 判断子模块, 用于判断是否曾经向所述其他设备发送过第二设备发现 信标帧;
返回子模块, 用于在所述判断模块的结果为否的情况下, 向所述其他 设备返回第三设备发现信标帧, 以实现所述其他设备对所述接收设备的发 现, 其中, 所述第三设备发现信标帧中的第二通信对端设备标识为所述其 他设备的标识;
发现子模块, 用于在所述判断模块的结果为是的情况下, 依据所述第 一设备发现信标帧实现对所述其他设备的发现。
13、 根据权利要求 12所述的设备, 其特征在于, 所述第一设备发现信 标帧的参数还包括信标帧可用资源位置, 所述信标帧可用资源位置用于指 示当前可以发送信标帧的资源; 所述返回子模块包括:
获取资源位置子模块, 用于依据第一设备发现信标帧, 获取可以发送 第三设备发现信标帧的信标帧可用资源的位置;
发送子模块, 用于在信标帧可用资源位置中未被使用的资源位置上, 选择空闲时隙发送所述第三设备发现信标帧。
14、 根据权利要求 8所述的设备, 其特征在于, 还包括:
发送模块, 用于在所述当前超帧的下一个超帧中, 向所述其他设备发 送信息发送知会信标帧, 所述信息发送知会信标帧包括信息发送的位置, 所述信息发送的位置用于指示所述当前设备当前使用的资源位置。
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