WO2015139392A1

WO2015139392A1 - Method and apparatus for preventing d2d communication interference

Info

Publication number: WO2015139392A1
Application number: PCT/CN2014/082587
Authority: WO
Inventors: 陈琳; 吴栓栓; 刘锟; 戴博; 李大鹏
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-03-20
Filing date: 2014-07-21
Publication date: 2015-09-24
Also published as: CN104202821A; CN104202821B

Abstract

A method and apparatus for preventing D2D communication interference, relating to the technical field of wireless communication, and resolving the problem of interference by D2D transmission on cellular transmission. The method comprises: a user device acquires a D2D resource allocation mode and/or D2D power control information; the user device uses the D2D resource allocation mode and/or the D2D power control information to implement D2D transmission. The present technical solution is suitable for use in a D2D technology network, allowing smooth implementation of D2D transmission and uplink cellular transmission.

Description

Device-to-device communication interference avoiding method and device

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a device-to-device communication interference avoiding method and apparatus.

Background technique

With the development of wireless multimedia services, the demand for high data rates and user experiences is increasing, which places high demands on the system capacity and coverage of traditional cellular networks. On the other hand, application scenarios such as public safety, social networking, close-range data sharing, and local advertising have led to an increasing demand for understanding and communicating with nearby people or things (such as proximity services, Proximity Services). The traditional base station-centric cellular network has obvious limitations in supporting high data rates and proximity services. In the context of this demand, it represents a new device-to-device (Device-to-Device) for future communication technologies. D2D) technology came into being. The application of D2D technology can reduce the burden on the cellular network, reduce the battery power consumption of the user equipment, increase the data rate, and improve the robustness of the network infrastructure, which satisfies the requirements of the above high data rate services and proximity services.

D2D technology can work in licensed or unlicensed frequency bands, allowing multiple D2D-enabled user equipment (D2D User Equipment, D2D UE) to directly discover without network infrastructure or network infrastructure. / Direct communication. There are three main application scenarios for D2D:

1) UE1 and UE2 perform data interaction under the coverage of the cellular network, and the user plane data does not pass through the network infrastructure, as shown in mode 1 of FIG. 1;

2) UE relay transmission in the weak/uncovered area, as shown in mode 2 in Figure 1, the UE4 with poor signal quality is allowed to communicate with the network through the UE3 with network coverage nearby, which can help the operator to expand coverage and increase capacity. ;

3) In the event of an earthquake or emergency, the cellular network is not working properly, allowing direct communication between devices, as in Mode 3 of Figure 1, the control plane and user plane between UE5, UE6 and UE7 do not pass through the network infrastructure. Perform one-hop or multi-hop data communication. The D2D technology generally includes a D2D discovery technology and a D2D communication technology, where the D2D discovery technology is used to determine/determine the proximity between two or more D2D user devices (for example, within a range in which D2D direct communication is possible) Or a technique for determining/determining that the first user equipment is adjacent to the second user equipment. Generally, D2D user equipment can discover each other by transmitting or receiving discovery signals/information; D2D communication technology refers to a technology in which some or all communication data between D2D user equipments can directly communicate without going through a network infrastructure.

According to the progress of the relevant 3GPP standard conference, there are two resource allocation modes, namely D2D discovery and D2D communication resources, namely, resource acquisition based on contention (first resource allocation mode) or allocation of proprietary resources by the base station for the UE. (Second resource allocation method) D2D discovery/communication is performed. The first resource allocation mode is usually pre-allocated by the base station or the system to a D2D resource pool, and the D2D UE participating in the D2D discovery/communication listens to the resource pool, and acquires the D2D transmission resource by means of contention. The second resource allocation mode is configured by the base station to allocate appropriate D2D resources to the UE according to the scheduling request/buffer status report of the UE.

The current standard specifies that D2D discovery and communication resources use uplink spectrum resources as much as possible in a coverage scenario with cellular networks. When the D2D UE uses the uplink spectrum resource for D2D transmission (including D2D discovery information and D2D communication data transmission), the D2D transmission may interfere with the uplink cellular control information and/or the uplink cellular data information reception of the base station.

The related art does not provide a systematic solution to the above interference of D2D transmission to cellular transmission. Summary of the invention

Embodiments of the present invention provide a device-to-device communication interference avoiding method and apparatus, which solves the problem of D2D transmission interference to cellular transmission.

A device-to-device (D2D) communication interference avoiding method includes:

The user equipment acquires a D2D resource allocation mode and/or D2D power control information;

The user equipment performs D2D transmission using the D2D resource allocation mode and/or D2D power control information.

Preferably, the D2D resource allocation manner information includes at least one of the following: The configuration information, the configuration of the corresponding resource information, the scenario in which the user device is located, and the state of the user device, wherein the scenario in which the user device is located includes an overlay scenario and an uncovered scenario, and the user device state includes a connected state and an idle state.

Preferably, the configuration information includes at least one of the following:

First resource allocation information, second resource allocation information, resource allocation indication information sent by the first transmission node,

The first transmission node includes one or more of the following:

Base station, mobility management entity (MME), professional server.

Preferably, the resource information includes: a D2D discovery resource/resource pool, and/or a D2D communication resource/resource pool;

The D2D communication resource/resource pool includes a D2D control resource/resource pool, and/or a D2D data resource/resource pool.

Preferably, the resource allocation indication information includes: enabling or disabling the user equipment to acquire the D2D resource by using the allocation information.

Preferably, the D2D power control information includes one of the following:

The maximum transmit power level/threshold allowed by the user equipment for D2D transmission, the minimum transmit power level/threshold allowed by the user equipment for D2D transmission, and the user equipment performing transmission for D2D transmission on the allocated resource Power level/threshold/signal-to-noise ratio threshold/adjustment step size,

The user equipment D2D corresponding to the first resource allocation information and/or the second resource allocation information and the corresponding D2D resource transmits the allowed transmission power level/signal-to-noise ratio threshold,

The user equipment D2D corresponding to the first resource allocation information and/or the second resource allocation information and each resource allocation unit included in the corresponding D2D resource transmits the allowed transmission power level/signal-to-noise ratio threshold/adjustment step size,

The user equipment D2D corresponding to the first resource allocation information and/or the second resource allocation information and the resource group corresponding to the corresponding D2D resource transmits the allowed transmission power level/signal-to-noise ratio threshold/adjustment step size. Preferably, the method further includes:

When the D2D power control information includes the first transmission resource information and/or the second resource allocation information, and the user equipment D2D corresponding to the resource group corresponding to the corresponding D2D resource transmits the allowed transmission power level/signal-to-noise ratio threshold/ When adjusting the step size,

The user equipment groups the D2D resources according to frequency domain and/or time domain location, and different groups respectively perform power control, wherein the result of grouping according to the frequency domain and/or the time domain location is any one of the following: As a group, the center is a group;

A specific physical resource block (PRB) is a group, and the remaining PRBs are a group;

The specific time domain location sidebands are a group, the remaining PRBs of a specific time domain location are a group, and the remaining time domain locations are a group;

A specific time domain location is a group, and the remaining time domain locations are a group;

Grouped according to the number of transmissions.

Preferably, the user equipment acquiring the D2D resource allocation manner and/or the D2D power control information includes: the user equipment receiving the D2D resource allocation manner and/or the D2D power control information from the base station; or the user equipment from the D2D server or The professional server or MME obtains D2D resource allocation and/or D2D power control information; or

The user equipment has a pre-configured D2D resource allocation mode and/or D2D power control information. Preferably, the receiving, by the user equipment, the D2D resource allocation manner and/or the D2D power control information from the base station includes:

Receiving, by the user equipment, a message that includes a D2D resource allocation mode and/or D2D power control information, where the message is sent by using broadcast signaling or by using dedicated signaling, where the dedicated signaling includes radio resource control (RRC) a signaling or medium access control control element (MAC CE) or physical downlink control channel (PDCCH) control signaling, the RRC signaling preferably being RRC connection setup signaling or RRC connection reconfiguration signaling or a new RRC message, The broadcast signaling is preferably a System Information Block (SIB).

Preferably, the D2D transmission by the user equipment by using the D2D resource allocation mode and/or the D2D power control information includes:

The user equipment performs D2D using the D2D resource allocation manner and/or D2D power control information. Resource acquisition;

The user equipment determines the D2D transmission transmission power by using the D2D power control information; and the user equipment performs D2D transmission by using the acquired D2D resource and/or the D2D transmission transmission power.

Preferably, the D2D resource acquisition by the user equipment by using the D2D resource allocation manner includes:

Determining, by the user equipment, the selection of the resource according to configuration information; or

Determining, by the user equipment, the selection of the resource according to the resource information corresponding to the configuration; or, the user equipment determines the selection of the resource according to the scenario where the user equipment is located; Preferably, the user equipment is configured according to the configuration information. Determining the selection of the resource includes: when obtaining the second resource allocation information, the user equipment performs the D2D transmission by using the second resource allocation information;

When obtaining the first resource allocation information, the user equipment performs D2D transmission using the first resource allocation information; or

When the user equipment obtains the first resource allocation information and the second resource allocation information, the user equipment determines, according to the resource allocation indication sent by the first transmission node, which resource is selected for D2D transmission.

Preferably, the determining, by the user equipment, the selection of the resource according to the resource information corresponding to the allocation manner includes:

When the resource corresponding to the first resource allocation information is located in a specific area, and the resource corresponding to the second resource allocation information is not located in the specific area, the user equipment selects a second resource allocation manner, where the specific area is predefined. a PRB location and adjacent to an uplink control channel (PUCCH)/uplink shared channel (PUSCH) resource of the cellular system;

When the resource corresponding to the second resource allocation information is located in the specific area, and the resource corresponding to the first resource allocation information is not located in the specific area, the user equipment selects a first resource allocation manner;

When the resource corresponding to the first resource allocation information and the resource corresponding to the second resource allocation information are Located in the specific area, the user equipment selects a resource that is far away from the specific area and a corresponding allocation manner;

Preferably, determining, by the user equipment, the selection of the resource according to a scenario in which the user equipment is located includes:

The second resource allocation priority is higher than the first resource allocation in the coverage scenario, and the user equipment preferentially selects the second resource allocation mode; or

The connected state user equipment preferably has a second resource allocation manner; or

The idle state user equipment prefers the first resource allocation mode.

Preferably, the D2D resource acquisition by the user equipment by using the D2D power control information includes: the user equipment selects the allowed user equipment transmission power level/signal-to-noise ratio threshold to be the maximum transmission power allowed by the user equipment for D2D transmission. Level or threshold and D2D resources in the minimum transmit power level or threshold range and corresponding resource allocation modes, using the determined D2D resource allocation manner for D2D resource acquisition; or

Transmitting, by the user equipment, the allowed transmission power level/letter according to each resource allocation unit and/or the user equipment D2D of the resource allocation unit and/or the resource group corresponding to the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information The noise ratio threshold is determined, and the D2D resource and the resource subset that are acceptable to the user equipment are determined, and the D2D resource acquisition is performed according to the determined D2D resource and the resource subset.

Preferably, performing the D2D resource acquisition according to the determined D2D resource and the resource subset comprises: the user equipment listening to the D2D resource pool or the D2D resource pool subset, and obtaining the D2D sending resource by means of contention; or

The user equipment sends a scheduling request/buffer status report to the base station, and the base station allocates appropriate D2D resources to the UE.

Preferably, the determining, by the user equipment, the D2D transmission and transmission power according to the D2D power control information includes:

The user equipment uses the maximum transmit power level or threshold allowed for D2D transmission as

D2D transmission transmit power; or,

The user equipment performs a transmit power level/threshold allowed by the D2D transmission according to the user equipment, Or the transmission power level/threshold/adjustment step size allowed by the user equipment D2D corresponding to the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information, or corresponding to the first resource allocation information and/or the The transmission power level allowed by the user equipment D2D of each resource allocation unit included in the D2D resource corresponding to the second resource allocation information is another threshold/adjustment step, or corresponds to the first resource allocation information and/or the second resource allocation information. The transmission power level/threshold/adjustment step size allowed by the user equipment D2D of the resource group corresponding to the corresponding D2D resource, determining the D2D transmission transmission power within the maximum and minimum transmission power level or threshold range allowed by the D2D transmission; or And the user equipment measures a path loss between the base station, a signal to noise ratio threshold allowed by the user equipment for performing D2D transmission, or a user corresponding to the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information. The signal to noise ratio threshold allowed by the device D2D transmission, or the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information The user equipment D2D transmission allowed by the user equipment D2D of each resource allocation unit, or the user equipment D2D transmission corresponding to the resource group corresponding to the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information The allowed signal-to-noise ratio threshold determines the D2D transmission transmit power within the maximum and minimum transmit power level/threshold allowed for D2D transmission.

The embodiment of the invention further provides a device-to-device (D2D) communication interference avoiding method, which comprises:

Network side device configuration / acquisition D2D resource allocation mode and / or D2D power control information;

The network side device sends the D2D resource allocation manner and/or to the corresponding user equipment.

The D2D power control information indicates that the user equipment performs D2D transmission by using the D2D resource allocation mode and/or D2D power control information.

Preferably, the network side device is any one of the following:

Base station, D2D server, professional server, mobility management entity (MME).

Preferably, the network side device sends the D2D resource allocation mode and/or the D2D power control information to the corresponding user equipment, including:

The network side device sends the D2D resource allocation mode and/or D2D power control information by using broadcast signaling or dedicated signaling, where the dedicated signaling includes radio resource control (Radio resource Control, RRC) signaling or media access control control element (Medium Access Control, Control Element, MAC CE) or physical downlink control channel (PDCCH) control signaling or non-access stratum (NAS) message or pass The RRC signaling is preferably RRC connection setup signaling or RRC connection reconfiguration signaling or a new RRC message, and the broadcast signaling is preferably a System Information Block (SIB).

Preferably, when the network side device is a base station, the network side device configures/acquires a D2D resource allocation mode and/or D2D power control information, including:

The base station pre-configures a D2D resource allocation mode and/or D2D power control information; or

The base station updates the configuration of the D2D resource allocation mode and/or the D2D power control information; or, the base station receives the authenticated D2D resource allocation mode and/or the D2D power control information from the MME when the UE accesses; or

The base station detects that the cellular uplink control channel and/or the cellular uplink shared channel are interfered, and updates the D2D resource allocation mode and/or the D2D power control information; or

Receiving, by the base station, a power control problem, and allocating resources and/or power control configurations to the user equipment; or

The base station receives a D2D resource allocation request sent by the user equipment, and allocates resources and/or power control configurations to the user equipment.

Preferably, the base station detects that the cellular uplink control channel and/or the cellular uplink shared channel are interfered, and the updating the D2D resource allocation mode and/or the D2D power control information includes:

The base station suspends D2D transmission, or

The base station adjusts the D2D resource allocation mode and/or the D2D power control information according to the interference situation, or the base station determines, according to the location of the D2D resource/resource pool, whether the interfered cellular uplink control channel and/or the cellular uplink shared channel resource are The D2D resource is adjacent, and when the judgment result is adjacent, the base station monitors the D2D communication control resource, parses the scheduling allocation information sent by the user equipment, and determines to use the D2D resource adjacent to the interfered cellular uplink control channel and/or the cellular uplink shared channel resource. User equipment;

The base station assembles a message including a D2D resource allocation mode and/or D2D power control information, and prepares to send to the user equipment. The embodiment of the invention further provides a device-to-device (D2D) communication interference avoidance device, comprising:

The information acquiring module is configured to obtain a D2D resource allocation mode and/or D2D power control information; and the data transmission module is configured to perform D2D transmission by using the D2D resource allocation mode and/or the D2D power control information.

Preferably, the information acquiring module includes:

a first acquiring unit, configured to receive a D2D resource allocation manner and/or D2D power control information from the base station;

The second acquisition unit, set to be from a D2D server or a professional server or mobile management entity

(MME) acquiring D2D resource allocation and/or D2D power control information;

The third obtaining unit is configured to pre-configure a D2D resource allocation manner and/or D2D power control information in the user equipment.

Preferably, the data transmission module includes:

a resource obtaining unit, configured to perform D2D resource acquisition by using the D2D resource allocation manner and/or D2D power control information;

And a power determining unit configured to determine D2D transmission transmission power by using the D2D power control information; and a transmission unit configured to perform D2D transmission by using the acquired D2D resource and/or the D2D transmission transmission power.

The embodiment of the invention further provides a device-to-device (D2D) communication interference avoidance device, which comprises:

a configuration module, configured to configure a D2D resource allocation mode and/or D2D power control information, and a sending module, configured to send the D2D resource allocation mode and/or D2D power control information to the corresponding user equipment, indicating the user equipment D2D transmission is performed using the D2D resource allocation method and/or D2D power control information.

Preferably, the device is integrated in any of the following network side devices: Base station, D2D server, professional server, mobility management entity (MME).

Preferably, the sending module includes:

The signaling sending unit is configured to send the D2D resource allocation manner and/or D2D power control information by using broadcast signaling or dedicated signaling, where the dedicated signaling includes radio resource control (RRC) signaling or media access a control control element (MAC CE) or a physical downlink control channel (PDCCH) control signaling, where the RRC signaling is preferably RRC connection setup signaling or RRC connection reconfiguration signaling or a new RRC message, and the broadcast signaling is preferably System Information Block (SIB).

Preferably, the configuration module includes:

a first configuration unit, configured to pre-configure a D2D resource allocation manner and/or D2D power control information; and a second configuration unit configured to update a D2D resource allocation manner and/or a configuration of D2D power control information;

a third configuration unit, configured to receive an authenticated D2D resource allocation manner and/or D2D power control information from the MME when the UE accesses;

a fourth configuration unit, configured to update the D2D resource allocation mode and/or the D2D power control information when detecting that the cellular uplink control channel and/or the cellular uplink shared channel are dried;

a fifth configuration unit, configured to allocate a resource and/or a power control configuration to the user equipment when the power control problem is reported;

And a sixth configuration unit, configured to allocate a resource and/or a power control configuration to the user equipment when receiving the D2D resource allocation request sent by the user equipment.

Preferably, the fourth configuration unit includes:

Adjust the subunit, set to pause D2D transfer, or,

Adjusting the D2D resource allocation mode and/or the D2D power control information according to the interference situation, or determining whether the interfered cellular uplink control channel and/or the cellular uplink shared channel resource are adjacent to the D2D resource according to the location of the D2D resource/resource pool, in determining The result is that the base station monitors the D2D communication control resource in the proximity, parses the scheduling allocation information sent by the user equipment, and determines the user equipment that uses the D2D resource adjacent to the interfered cellular uplink control channel and/or the cellular uplink shared channel resource; The assembly subunit is configured to assemble a message including a D2D resource allocation mode and/or D2D power control information, and is ready to be sent to the user equipment.

The embodiment of the present invention further provides a computer program, including program instructions, when the program instruction is executed by the user equipment, so that the user equipment can perform the above method to implement device-to-device communication interference avoidance. The embodiment of the invention also provides a carrier carrying the computer program.

The embodiment of the present invention further provides a computer program, including program instructions, when the program instruction is executed by a network side device (such as a base station), so that the network side device can perform the above method to implement device-to-device communication interference avoidance. Embodiments of the present invention also provide a carrier carrying the computer program.

The device-to-device communication interference avoiding method and device provided by the embodiment of the present invention, the user equipment acquires a D2D resource allocation manner and/or D2D power control information, and the user equipment uses the D2D resource allocation manner and/or D2D power control Information is transmitted in D2D. The user equipment can select the appropriate resource acquisition mode and the corresponding transmission power according to the requirements, ensure the smooth progress of the D2D transmission and the uplink cellular transmission, and solve the problem that the D2D transmission interferes with the cellular transmission.

BRIEF abstract

Figure 1 Schematic diagram of the device through/system discovery/communication scenario;

2 is a schematic diagram of a D2D transmission and a cellular transmission interference scenario of a device through-system according to an embodiment of the present invention;

3 is a flow chart of interference avoidance of a device through system according to an embodiment of the present invention;

4 is a flow chart of D2D transmission based on pre-configured power control information according to Embodiment 1 of the present invention; FIG. 5 is a flow chart of D2D transmission based on system broadcast power control information according to Embodiment 2 of the present invention; FIG. 6 is a third embodiment of the present invention. A D2D transmission flow chart with signaling power control information;

7 is a D2D transmission process of fine-grained power control information based on system broadcast according to Embodiment 4 of the present invention; Figure

FIG. 8 is a flowchart of D2D transmission of fine-grained power control information based on dedicated signaling according to Embodiment 5 of the present invention; FIG.

9 is a flowchart of D2D transmission of resource allocation mode control information based on dedicated signaling according to Embodiment 6 of the present invention;

10 is a flowchart of D2D transmission based on pre-configured resource allocation mode control information according to Embodiment 7 of the present invention;

11 is a flowchart of a base station controlling whether D2D can use a first resource allocation manner according to Embodiment 8 of the present invention;

FIG. 12 is a flowchart of a device for acquiring a resource allocation mode according to a ninth embodiment of the present invention; FIG. 13 is a schematic diagram of a device-to-device communication interference avoiding device according to Embodiment 10 of the present invention;

14 is a schematic structural diagram of an information acquisition module in FIG. 13;

Figure 15 is a schematic structural view of the data transmission module of Figure 13;

16 is a schematic structural diagram of still another device-to-device communication interference avoidance device according to Embodiment 10 of the present invention;

17 is a schematic structural diagram of a configuration module 1601 of FIG. 16;

18 is a schematic structural diagram of a sending module 1602 of FIG. 16;

Figure 19 is a block diagram showing the structure of the fourth configuration unit 1704 of Figure 17; Preferred embodiment of the invention

The current standard specifies that D2D discovery and communication resources use uplink spectrum resources as much as possible in a coverage scenario with cellular networks. When the D2D UE performs D2D transmission (including D2D discovery information and D2D communication data transmission) by using uplink spectrum resources, the transmission of the D2D may interfere with the uplink cellular control information and/or the uplink cellular data information reception of the base station. As shown in (a) of Figure 2, UE1 is performing D2D transmission while UE3 is performing uplink cellular communication. Assuming that UE1 is relatively close to the base station, UE2's D2D transmission may generate inband emissions. Therefore, interference is generated on the uplink control channel (PUCCH) transmission (the first interference scenario) of the UE3. As shown in (b) of FIG. 2, the base station cannot correctly correct the uplink control information sent by the UE3. In addition, the in-band leakage caused by the D2D transmission of the UE1 may also interfere with the uplink shared channel (PUSCH) transmission (second interference scenario) of the UE3, and the base station cannot correctly solve the uplink cellular data sent by the UE3. .

The related art does not provide a systematic solution to the above interference of D2D transmission to cellular transmission. The embodiment of the present invention provides a device-to-device communication interference avoiding method and apparatus. According to the technical solution provided by the embodiment of the present invention, the user equipment can select an appropriate resource acquisition mode and corresponding transmit power according to requirements, and ensure D2D. Transmission and uplink cellular transmission proceed smoothly.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. The "/" in the following indicates "or".

The problem to be solved by the embodiments of the present invention is the interference problem caused by the in-band leakage generated by the D2D transmission to the uplink cellular control information of the base station and/or the reception of the uplink cellular data information. The related art does not provide a systematic solution to the above interference of D2D transmission to cellular transmission. The embodiment of the present invention provides a device-to-device communication interference avoidance method. The user equipment can select an appropriate resource acquisition mode and a corresponding transmit power according to requirements to ensure smooth D2D transmission and uplink cellular transmission.

As shown in FIG. 3, the user equipment first obtains a D2D resource allocation mode and/or D2D power control information, where the D2D resource allocation mode information includes at least one of the following:

The configuration information, the corresponding resource information, the scenario where the user equipment is located, and the user equipment status.

The scenario in which the user equipment is located includes an overlay scenario and an uncovered scenario, and the user device state includes a connected state and an idle state.

The configuration information includes at least one of the following:

First resource allocation information, second resource allocation information, resource allocation indication information sent by the first transmission node, The first transmission node includes one or more of the following:

Base station, mobility management entity (MME), professional server.

The resource information includes: a D2D discovery resource/resource pool, and/or a D2D communication resource/resource pool; the D2D communication resource/resource pool includes a D2D control resource/resource pool, and/or a D2D data resource/resource pool.

The resource allocation indication information includes: enabling or disabling the user equipment to acquire the D2D resource by using the allocation information.

The D2D power control information includes one of the following:

The user equipment D2D corresponding to the first resource allocation information and/or the second resource allocation information, and the corresponding D2D resource transmits the allowed transmission power level/signal-to-noise ratio threshold,

The transmission power level/signal-to-noise ratio threshold/adjustment step size corresponding to the first resource allocation information and/or the second resource allocation information, and the user equipment D2D transmission of each resource allocation unit included in the corresponding D2D resource ,

The user equipment D2D corresponding to the first resource allocation information and/or the second resource allocation information and the resource group corresponding to the corresponding D2D resource transmits the allowed transmission power level/signal-to-noise ratio threshold/adjustment step size.

The user equipment then performs D2D transmission using the D2D resource allocation method and/or D2D power control information. The technical solution proposed by the embodiment of the present invention can be applied to D2D discovery and can also be applied to the D2D degree to alleviate the interference problem of uplink cellular transmission to D2D transmission.

Embodiment 1 The embodiment of the present invention provides a device-to-device communication interference avoiding method, which is used by a user equipment. D2D power control information for interference avoidance.

The UE1 system with D2D communication is preconfigured with the maximum transmit power and minimum transmit power allowed for D2D transmission. In addition, the system may pre-configure the signal-to-noise ratio threshold allowed by the D2D transmission relative to the base station. These power control information may be system default values, or built in the UE, or may be obtained from the D2D server or the proximity server or from the core network element MME (via NAS message) after the UE accesses the network, as shown in FIG. 4 Shown.

After obtaining the information, the UE first acquires the D2D resource when the D2D communication needs to be initiated, and ensures that the D2D transmission power does not exceed the maximum transmission power allowed by the D2D transmission during the D2D transmission. If the power control information acquired by the UE includes a signal to noise ratio threshold allowed by the D2D transmission relative to the base station, the UE needs to monitor and measure the path loss between the base station and then the signal to noise ratio threshold allowed according to the D2D transmission with respect to the base station. Calculating the transmit power corresponding to the D2D transmission, and ensuring that the signal-to-noise ratio corresponding to the D2D transmission monitored by the base station side during the D2D transmission does not exceed the signal-to-noise ratio threshold allowed by the system for the D2D transmission relative to the base station. If the calculated D2D transmission transmission power is greater than the maximum transmission power allowed by the D2D transmission, the UE performs D2D transmission using the maximum transmission power allowed by the D2D transmission; if the D2D transmission transmission power is smaller than the maximum transmission power allowed by the D2D transmission and is greater than The minimum transmit power allowed by the D2D transmission, the UE uses the D2D transmission transmit power to perform D2D communication data transmission; if the D2D transmission transmission power is smaller than the minimum transmission power allowed by the D2D transmission, the UE abandons the D2D transmission or reports the situation to the base station. .

The power control information pre-configuration method proposed in the embodiment of the present invention may define a power control configuration at a system or cell level or a UE level. The method can be applied to both the connected state and the D2D UE's discovery/communication in idle state.

Example two

The embodiment of the invention provides a device-to-device communication interference avoiding method, and the user equipment uses the D2D power control information to perform interference avoidance.

The UE1 serving base station with the D2D discovery function periodically transmits the maximum transmit power and/or minimum transmit power allowed by the D2D transmission and/or the signal to noise ratio threshold of the D2D transmission relative to the base station through the SIB broadcast, as shown in FIG. . The power control information sent by the broadcast may only contain the maximum transmit power information, and may also include only the signal to noise ratio threshold information. Can be used completely between cells With the same power control information configuration, it is also possible to use different power control information for different cells and the processing capabilities of the base station.

After receiving the power control information from the base station, the UE1 first acquires the D2D resource when it is desired to be discovered by other UEs or actively discovers a specific UE, and ensures that the D2D transmission power does not exceed the maximum transmission allowed by the D2D transmission when performing D2D transmission. power. If the power control information acquired by the UE includes a signal to noise ratio threshold allowed by the D2D transmission relative to the base station, the UE needs to monitor and measure the path loss between the base station and then the signal to noise ratio threshold allowed according to the D2D transmission with respect to the base station. Calculating the transmit power corresponding to the D2D transmission, and ensuring that the signal to noise ratio corresponding to the D2D transmission monitored by the base station side during D2D transmission does not exceed the signal to noise ratio threshold allowed by the D2D transmission sent by the SIB broadcast relative to the base station. If the calculated D2D transmission transmission power is greater than the maximum transmission power allowed by the D2D transmission, the UE performs D2D transmission using the maximum transmission power allowed by the D2D transmission; if the D2D transmission transmission power is smaller than the maximum transmission power allowed by the D2D transmission and is greater than The minimum transmission power allowed by the D2D transmission, the UE uses the D2D transmission transmission power to perform D2D communication data transmission; if the D2D transmission transmission power is smaller than the minimum transmission power allowed by the D2D transmission, the UE abandons the D2D transmission or reports the situation to the base station. .

The power control information sending method proposed by the embodiment of the present invention may define a power control configuration at a system or cell level. The method can be applied to the discovery/communication of the connected state as well as the idle state of the D2D UE. Considering the movement of the D2D UE, the power control information transmitted through the SIB broadcast can be transmitted from the target base station to the source base station in the D2D UE handover preparation phase.

Example three

The UE1 having the D2D communication function can receive the maximum transmit power and/or the minimum transmit power allowed by the D2D transmission sent by the dedicated signaling from the serving base station and/or the signal to noise ratio threshold allowed by the D2D transmission relative to the base station, as shown in the figure. 6 is shown. The proprietary information sent by the base station may be RRC signaling, multiplexing related RRC connection establishment or RRC connection reconfiguration message, or designing a new RRC message to carry the D2D power control information. The power control information sent through the proprietary signaling may only contain the maximum transmit power information, and may also include only the signal to noise ratio threshold information. Each UE served by the base station can In order to use the same power control information configuration, it is also possible to use different power control information for different UEs.

After receiving the power control information from the base station, UE1 first obtains the D2D resource when D2D communication is desired, and ensures that the D2D transmission power does not exceed the maximum transmission power allowed by the D2D transmission when performing D2D transmission. If the power control information acquired by the UE includes a signal to noise ratio threshold allowed by the D2D transmission relative to the base station, the UE needs to monitor and measure the path loss between the base station and then the signal to noise ratio threshold allowed according to the D2D transmission with respect to the base station. Calculating the transmit power corresponding to the D2D transmission, and ensuring that the signal-to-noise ratio corresponding to the D2D transmission monitored by the base station side during the D2D transmission does not exceed the signal-to-noise ratio threshold allowed by the D2D transmission obtained by the dedicated signaling with respect to the base station. If the calculated D2D transmission transmission power is greater than the maximum transmission power allowed by the D2D transmission, the UE performs D2D transmission using the maximum transmission power allowed by the D2D transmission; if the D2D transmission transmission power is smaller than the maximum transmission power allowed by the D2D transmission and is greater than The minimum transmit power allowed by the D2D transmission, the UE uses the D2D transmission transmit power to perform D2D communication data transmission; if the D2D transmission transmission power is smaller than the minimum transmission power allowed by the D2D transmission, the UE abandons the D2D transmission or reports the situation to the base station. .

In addition to the D2D power control information acquired by the UE during initial access, the D2D power control information may also be sent when the base station allocates a dedicated D2D resource for the UE. If the D2D UE1 obtains the D2D resource by using the second resource allocation manner, the UE1 sends a scheduling request/buffer status report (BSR) to the base station. After receiving the message, the base station allocates resources for the UE1 and determines for the UE. The transmit power or SNR threshold allowed for D2D transmission on the allocated resources. The base station can then send to UE1 through RRC signaling or a signal to noise ratio threshold.

After receiving the resource allocation and the power control information from the base station, the UE1 uses the transmission power allowed by the D2D transmission sent by the base station or the signal-to-noise ratio threshold allowed according to the D2D transmission sent by the base station, if the base station detects the cellular uplink control channel and/or Or the cellular uplink shared channel is interfered, and the base station determines whether the interfered cellular uplink control channel and/or the cellular uplink shared channel resource is adjacent to the D2D communication data resource. If adjacent, the base station monitors the D2D communication control resource, parses the scheduling allocation information sent by the user equipment, determines the use and interference of the cellular uplink control channel, and/or the cellular The user equipment of the D2D communication data resource adjacent to the shared channel resource is assumed to be the UE1, and the base station assembles a message including the transmission power or the signal-to-noise ratio threshold information allowed by the current D2D transmission, and sends the message through the dedicated signaling. Give UE1.

The power control information sending method proposed by the embodiment of the present invention may define a power control configuration of a system or a cell level or a UE level. This method can only be applied to the discovery/communication of connected D2D UEs. Considering the movement of the D2D UE, the power control information transmitted through the dedicated signaling may be sent from the target base station to the source base station in the D2D UE handover preparation phase, and sent by the source base station to the UE.

Example four

The embodiment of the invention provides a device-to-device communication interference avoiding method, and the user equipment uses

D2D power control information for interference avoidance.

The serving base station of the UE1 having the D2D communication function periodically transmits the allowed transmission power level/signal-to-noise ratio threshold corresponding to the first and/or second resource allocation mode D2D resource pools transmitted by the SIB broadcast, or The user equipment D2D corresponding to each resource allocation unit included in the first and/or second resource allocation mode D2D resource pool transmits the allowed transmission power level/signal-to-noise ratio threshold, as shown in FIG. The transmission power level/signal-to-noise ratio threshold allowed for the user equipment D2D transmission corresponding to the first and/or second resource allocation mode D2D resource pool may be a list, and each element in the list is for a certain D2D resource pool. User equipment D2D transmits the maximum transmit power level/signal-to-noise ratio threshold allowed. And the transmission power level/signal-to-noise ratio threshold allowed for the user equipment D2D transmission corresponding to each resource allocation unit included in the first and/or second resource allocation mode D2D resource pool is one for each D2D resource pool. List, each element in the list is the maximum transmit power level/signal-to-noise ratio threshold allowed for user equipment D2D transmission for each resource allocation/contention unit contained in the D2D resource pool. The maximum transmit power level/signal-to-noise ratio threshold allowed by the user equipment D2D transmission can be indicated by one bit, such as 0 flag high and 1 flag low, respectively corresponding to the system predefined transmit power level/signal-to-noise ratio threshold. In this case, the list becomes a bitmap. The maximum transmit power level/signal-to-noise ratio threshold allowed for user equipment D2D transmission may also be indicated by a predefined number of transmit power levels/signal-to-noise ratio threshold levels, the different levels being indicated by the encoded information. In addition, the D2D resource pool may be grouped according to frequency domain and/or time domain location, and different groups respectively perform power control, and each element in the list indicates a certain group of transmission power levels. Don't/signal-to-noise ratio threshold; for example: two sidebands as a group, a center as a group, or a specific physical resource block

(hysical resource block , PRB ) is a group, the remaining PRBs are a group, or a certain time domain location sideband is a group, the remaining PRBs of a specific time domain location are a group, the remaining time domain locations are a group, or, specific The time domain location is a group, the remaining time domain locations are a group, or, according to the number of transmissions, such as: a first group, a group is retransmitted, or the first transmission is a group, and the second transmission is a group. , the third transmission is a group and so on. This way of grouping the transmit power level/signal-to-noise ratio thresholds and corresponding coding is also applicable to the previous examples 1-3. The base station can design a new SIB or reuse the associated SIB to add new fields related to the aforementioned power control.

After receiving the power control information from the base station, the UE1 first acquires the D2D resource when the D2D communication is desired, and then transmits the allowed transmission power according to the user equipment D2D corresponding to the corresponding D2D resource pool, or corresponds to the acquired resource unit. The transmission power allowed by the corresponding user equipment D2D transmission determines the transmission power of the D2D transmission. If the power control information acquired by the UE includes a signal to noise ratio threshold corresponding to the D2D transmission corresponding to each resource allocation unit of the D2D resource pool or the D2D resource pool, the UE needs to monitor and measure between the base station and the base station. The path loss is then calculated according to the D2D resource pool of the UE acquiring the resource and/or the D2D transmission corresponding to the obtained resource relative to the SNR threshold allowed by the base station, and the transmission power corresponding to the D2D transmission is calculated to ensure the D2D transmission from the base station side. The signal-to-noise ratio corresponding to the monitored D2D transmission does not exceed the signal-to-noise ratio threshold allowed by the D2D transmission transmitted by the SIB broadcast relative to the base station. If the power control information acquired by the UE further includes the maximum transmit power allowed by the D2D transmission and the maximum transmit power allowed by the D2D transmission, the UE determines that if the calculated D2D transmission transmit power is greater than the maximum transmit power allowed by the D2D transmission, The UE performs D2D transmission using the maximum transmission power allowed by the D2D transmission; if the D2D transmission transmission power is smaller than the maximum transmission power allowed by the D2D transmission and greater than the minimum transmission power allowed by the D2D transmission, the UE uses the D2D transmission transmission power for D2D communication. Data transmission; If the D2D transmission transmission power is less than the minimum transmission power allowed by the D2D transmission, the UE abandons the D2D transmission or reports the situation to the base station.

The power control information sending method proposed by the embodiment of the present invention may define a power control configuration at a system or a cell level. The method can be applied only to the discovery/communication of the D2D UE in the connected state as well as in the idle state. Considering the movement of the D2D UE, the power control information transmitted through the dedicated signaling may be sent from the target base station to the source base station in the D2D UE handover preparation phase, and sent by the source base station to the UE. Example five

D2D power control information for interference avoidance.

The UE1 having the D2D communication function may receive, from the serving base station, a transmission power level/signal-to-noise ratio threshold allowed by the user equipment D2D transmission corresponding to the first and/or second resource allocation mode D2D resource pools transmitted through the dedicated signaling, Or the user equipment D2D corresponding to each resource allocation unit included in the first and/or second resource allocation mode D2D resource pool transmits the allowed transmission power level/signal-to-noise ratio threshold, as shown in FIG. 8. The transmission power level/signal-to-noise ratio threshold allowed for the user equipment D2D transmission corresponding to the first and/or second resource allocation mode D2D resource pool may be a list, and each element in the list is for a certain D2D resource pool. User equipment D2D transmits the maximum transmit power level/signal-to-noise ratio threshold allowed. And the transmission power level/signal-to-noise ratio threshold allowed for the user equipment D2D transmission corresponding to each resource allocation unit included in the first and/or second resource allocation mode D2D resource pool is one for each D2D resource pool. List, each element in the list is the maximum transmit power level/signal-to-noise ratio threshold allowed for user equipment D2D transmission for each resource allocation/contention unit contained in the D2D resource pool. The maximum transmit power level/signal-to-noise ratio threshold allowed by the user equipment D2D transmission can be indicated by one bit, such as 0 flag high and 1 flag low, respectively corresponding to the system predefined transmit power level/signal-to-noise ratio threshold. In this case, the list becomes a bitmap. In addition, the maximum transmit power level/signal-to-noise ratio threshold allowed for user equipment D2D transmission can also be indicated by a predefined number of transmit power level/signal-to-noise ratio threshold levels, which are indicated by the encoded information. In addition, the D2D resource pool may be grouped according to frequency domain and/or time domain location, and different groups respectively perform power control, and each element in the list indicates a certain group of transmission power level/signal noise. Specific threshold; for example: two sidebands are a group, the center is a group, or a specific PRB is a group, the remaining PRBs are a group, or a certain time domain position sideband is a group, and a specific time domain position remaining PRB For a group, the remaining time domain locations are a group, or a specific time domain location is a group, and the remaining time domain locations are a group, or grouped according to the number of transmissions, such as: a first pass group, a retransmission group, or The first transmission is a group, the second transmission is a group, and the third transmission is a group.

The proprietary information sent by the base station may be RRC signaling, multiplexing related RRC connection establishment or RRC connection reconfiguration message, or designing a new RRC message to carry the D2D power control information. The power control information sent through the dedicated signaling may only contain the maximum transmit power information allowed, and may also include only the signal to noise ratio threshold information. Each UE served by the base station may use the same power control information configuration, and may also use the changed power control information for different UEs.

After receiving the power control information from the base station, the UE1 first acquires the D2D resource when the D2D communication is desired, and then transmits the allowed transmission power according to the user equipment D2D corresponding to the corresponding D2D resource pool, or corresponds to the acquired resource unit. The transmission power allowed by the corresponding user equipment D2D transmission determines the transmission power of the D2D transmission. If the power control information acquired by the UE includes a signal to noise ratio threshold corresponding to the D2D transmission corresponding to each resource allocation unit of the D2D resource pool or the D2D resource pool, the UE needs to monitor and measure between the base station and the base station. The path loss is then calculated according to the D2D resource pool of the UE acquiring the resource and/or the D2D transmission corresponding to the obtained resource relative to the SNR threshold allowed by the base station, and the transmission power corresponding to the D2D transmission is calculated to ensure the D2D transmission from the base station side. The signal-to-noise ratio corresponding to the monitored D2D transmission does not exceed the signal-to-noise ratio threshold allowed by the D2D transmission received through the proprietary signaling with respect to the base station. If the power control information acquired by the UE further includes the maximum transmit power allowed by the D2D transmission and the maximum transmit power allowed by the D2D transmission, the UE determines that if the calculated D2D transmission transmit power is greater than the maximum transmit power allowed by the D2D transmission, The UE performs D2D transmission using the maximum transmission power allowed by the D2D transmission; if the D2D transmission transmission power is smaller than the maximum transmission power allowed by the D2D transmission and greater than the minimum transmission power allowed by the D2D transmission, the UE uses the D2D transmission transmission power for D2D communication. Data transmission; If the D2D transmission transmission power is less than the minimum transmission power allowed by the D2D transmission, the UE discards the D2D transmission or reports the situation to the base station.

In addition, after receiving the D2D power control information, the UE1 may also select an appropriate D2D resource according to the D2D power control information. If the UE1 acquires the transmission power level/signal-to-noise ratio threshold information allowed by the user equipment D2D corresponding to the first and/or second resource allocation mode D2D resource pool, the UE1 may select the allowed user equipment transmission power level/ The signal-to-noise ratio threshold is a D2D resource pool and a corresponding resource allocation mode within a maximum transmit power level/threshold and a minimum transmit power level/threshold range allowed by the user equipment for D2D transmission, and then D2D resources are performed according to the determined D2D resource allocation manner. Obtain. If the UE1 acquires the transmission power level/signal-to-noise ratio threshold information allowed by the user equipment D2D corresponding to each resource allocation unit included in the first and/or second resource allocation mode D2D resource pool, the UE1 may according to the D2D resource. Each fund included in the pool The user equipment D2D of the source allocation unit transmits the allowed transmission power level/signal-to-noise ratio threshold, determines a subset of resources included in the D2D resource pool acceptable to the user equipment, and then performs D2D resource acquisition according to the determined subset of the D2D resource pool.

The power control information sending method proposed by the embodiment of the present invention may define a power control configuration of a system or a cell level or a UE level. This method is only applicable to the discovery/communication of connected D2D UEs. Considering the movement of the D2D UE, the power control information transmitted through the dedicated signaling may be sent from the target base station to the source base station in the D2D UE handover preparation phase, and sent by the source base station to the UE.

Embodiment 6

The D2D resource allocation mode information is used for interference avoidance.

The UE1 having the D2D discovery function may receive the resource allocation manner corresponding to each D2D resource pool sent by the dedicated signaling from the serving base station, and/or allow/disable the user equipment to acquire the D2D resource by using the first/second resource allocation manner. The information is shown in Figure 9. The proprietary information sent by the base station may be RRC signaling, multiplexing related RRC connection establishment or RRC connection reconfiguration message, or designing a new RRC message to carry the D2D power control information. If the base station simultaneously allows the user equipment to use more than one D2D resource pool and/or one or more D2D resource allocation manners for the D2D discovery resource, the resource allocation information sent by the base station through the dedicated signaling may further include different D2D resource pools and/or The priority of the different resource allocation modes and/or the applicable scenario/geographic range information, if the second resource allocation mode has a higher priority than the second resource allocation mode, or the connected mode user equipment prefers the second resource allocation mode The resource pool and the idle user equipment are preferably dedicated to the first resource allocation mode resource pool of the idle state user. Each UE served by the base station may use the exact same resource allocation mode, and may also use different resource allocation modes for different UEs.

After receiving the resource allocation mode information from the base station, the UE1 acquires the resource according to the obtained resource allocation manner when it is desired to be discovered by other UEs or actively discover other UEs. If the first resource allocation mode is allowed, the resource is obtained from the D2D resource pool corresponding to the first resource allocation mode. If the second resource allocation mode is allowed, the scheduling request or the buffer status report request is sent to the base station to allocate the D2D resource. The first and second resource allocation modes are allowed, and the resource allocation mode is determined according to the priority and/or the applicable scenario information. After the resource allocation method is determined, if it is the first resource In the allocation mode, the user equipment monitors the D2D resource pool corresponding to the first resource allocation mode. Preferably, if there are multiple D2D resource pools corresponding to the first resource allocation manner, the UE1 determines a specific D2D resource pool according to the resource pool priority and/or the applicable scenario information. The UE1 may also determine the D2D resource subset according to the UE power control information acquired in the manners of the methods 1 to 5, for example, the UE1 transmits the allowed transmission power level/signal-to-noise ratio according to the user equipment D2D of each resource allocation unit included in the D2D resource pool. Threshold, determining a subset of resources included in the D2D resource pool acceptable to UE1, and then acquiring D2D transmission resources in a competitive manner according to the determined subset of D2D resource pools.

If it is the second resource allocation mode, the user equipment sends a scheduling request/buffer status report to the base station, and the base station allocates appropriate D2D resources to the UE. If the D2D power control information is not included in the D2D resource allocated by the base station for the UE1, and the UE2 obtains the D2D power control information, the UE1 calculates the D2D transmission power according to the transmission power calculation method mentioned in the examples 1 to 5, on the allocated resource. The D2D transmission power is used for D2D communication. If the D2D transmission transmission power calculated by the UE1 on the allocated resource is smaller than the minimum transmission power allowed by the D2D transmission, the UE discards the D2D transmission or reports the situation to the base station.

The resource allocation mode information sending method proposed by the embodiment of the present invention may define a resource allocation mode configuration at the system or cell level or UE level. This method is only applicable to the discovery/communication of connected D2D UEs. Considering the movement of the D2D UE, the power control information sent through the dedicated signaling may be sent from the target base station to the source base station in the D2D UE handover preparation phase, and sent by the source base station to the UE.

Example seven

The embodiment of the invention provides a device-to-device communication interference avoiding method, and the user equipment uses the D2D resource allocation mode information to perform interference avoidance.

The UE1 having the D2D communication function acquires in advance the resource allocation mode allowed by the D2D transmission. The preferred resource allocation mode information includes: a resource allocation manner corresponding to each D2D resource pool, and/or information that allows the user equipment to acquire the D2D resource by using the first/second resource allocation manner. If the base station simultaneously allows the user equipment to use more than one D2D resource pool and/or more than one D2D resource allocation manner for the D2D discovery resource, the resource allocation information sent by the base station through the dedicated signaling may further include different D2D resource pools and/or Priority and/or applicable scenario/geographic range information corresponding to different resource allocation methods. These resource allocation methods can be system defaults or built-in. In the UE, it is also possible to acquire (via NAS messages) from the D2D server or the proximity server or from the core network element MME after the UE accesses the network, as shown in FIG. The system may use the same resource allocation mode information configuration as described above, and may also configure the changed resource allocation mode information for different UEs.

After the UE obtains the information, when the D2D communication needs to be initiated, the resource allocation mode information is first determined. If the first resource allocation mode is allowed, the resource is obtained from the D2D resource pool corresponding to the first resource allocation mode, and if the second resource allocation mode is allowed. And sending a scheduling request or a buffer status report request to the base station to allocate the D2D resource. If the first and second resource allocation modes are allowed at the same time, the resource allocation manner is determined according to the priority and/or the applicable scenario information. After the resource allocation mode is determined, if it is the first resource allocation mode, the user equipment listens to the D2D resource pool corresponding to the first resource allocation mode. Preferably, if there are multiple D2D resource pools corresponding to the first resource allocation mode, the UE1 determines a specific D2D resource pool and/or a D2D resource subset according to the resource pool priority and/or the applicable scenario information, and finally passes the actual The method of contention acquires D2D transmission resources.

Example eight

The UE1 having the D2D communication function initiates D2D communication, and first selects to use the first resource allocation method to acquire resources for D2D transmission. During this time, the base station detects the cellular uplink control channel and / If the cellular uplink shared channel is interfered or the base station receives the interference from the user equipment and the power control problem is reported, the base station sends the D2D resource indication corresponding to the first resource allocation mode to the UE1 by using the dedicated signaling, as shown in FIG. . The indication may be sent to UE1 through RRC signaling/MAC CE/PDCCH. After receiving the indication, the UE1 stops the D2D resource obtained by using the first resource allocation manner. During this period, the UE1 allows the resource to be acquired by using the second resource allocation manner, and the UE1 may obtain the D2D resource for D2D transmission by using the second resource allocation manner. After a period of time, if the base station detects that the interference condition is improved, or the UE1 moves to an area where interference or power control problems do not occur, the base station may send the D2D corresponding to the first resource allocation mode to the UE1 through dedicated signaling. Resource indication. The indication may be sent to UE1 through RRC signaling/MAC CE/PDCCH. After receiving the indication, UE1 may select to reuse the D2D resource obtained by the first resource allocation manner.

Example nine

The embodiment of the present invention provides a device-to-device communication interference avoiding method. Before a base station sends a D2D resource allocation mode and/or D2D power control information to a UE through broadcast signaling or through dedicated signaling, the base station may start at the base station startup time. The D2D resource allocation mode and/or the D2D power control information is configured, and then the information is sent by the system broadcast signaling or when the UE accesses. If the system configuration changes, the base station can deliver the updated D2D resource allocation mode and/or D2D power control information through the system message update process or the proprietary signaling.

In addition, the base station may also acquire the D2D resource allocation mode and/or the D2D power control information for the entire system or cell level from the MME when the S1 connection is established, and then the base station sends the system broadcast signaling or the dedicated signaling. A UE having D2D capability (D2D discovery/communication capability after MME authentication according to core network HSS subscription information). Or, when the UE accesses, the authenticated D2D resource allocation mode and/or D2D power control information for the specific UE is obtained from the MME, as shown in FIG. 12, and then the base station sends the UE to the UE through dedicated signaling.

Example ten

The embodiment of the invention provides a device-to-device communication interference avoidance device, which can be combined with the device-to-device communication interference avoidance method provided in Embodiments 1 to 9 of the present invention to ensure smooth progress of D2D transmission and uplink cellular transmission. The structure of the device is shown in Figure 13, including:

The information obtaining module 1301 is configured to acquire a D2D resource allocation manner and/or D2D power control information; and the data transmission module 1302 is configured to perform D2D transmission by using the D2D resource allocation manner and/or D2D power control information.

Preferably, the structure of the information acquiring module 1301 is as shown in FIG. 14 and includes:

The first obtaining unit 1401 is configured to receive a D2D resource allocation manner and/or D2D power control information from the base station;

The second obtaining unit 1402 is configured to obtain D2D resource allocation and/or D2D power control information from the D2D server or the professional server or the MME;

The third obtaining unit 1403 is configured to pre-configure the D2D resource allocation mode and/or the D2D power control information in the user equipment.

Preferably, the structure of the data transmission module 1302 is as shown in FIG. 15, and includes:

The resource obtaining unit 1501 is configured to perform D2D resource acquisition by using the D2D resource allocation manner and/or D2D power control information;

The power determining unit 1502 is configured to determine the D2D transmission sending power by using the D2D power control information;

The transmitting unit 1503 is configured to perform D2D transmission using the acquired D2D resource and/or the D2D transmission transmission power.

The device-to-device communication interference avoidance device described in Figures 13 to 15 can be integrated into the user device, and the user device performs the corresponding function.

The present embodiment further provides a device-to-device communication interference avoidance device. The structure of the device is as shown in FIG. 16, and includes:

The configuration module 1601 is configured to configure the D2D resource allocation mode and/or the D2D power control information, and the sending module 1602 is configured to deliver the D2D resource allocation mode and/or the D2D power control information to the corresponding user equipment, indicating the The user equipment performs D2D transmission using the D2D resource allocation manner and/or D2D power control information. Preferably, the configuration of the configuration module 1601 is as shown in FIG. 17, and includes: a first configuration unit 1701 configured to pre-configure a D2D resource allocation manner and/or D2D power control information;

The second configuration unit 1702 is configured to update the configuration of the D2D resource allocation mode and/or the D2D power control information;

The third configuration unit 1703 is configured to receive the authenticated D2D resource allocation mode and/or the D2D power control information from the MME when the UE accesses;

The fourth configuration unit 1704 is configured to update the D2D resource allocation mode and/or the D2D power control information when detecting that the cellular uplink control channel and/or the cellular uplink shared channel are interfered; the fifth configuration unit 1705 is configured to receive When the power control problem is reported, allocating resources and/or power control configurations to the user equipment;

The sixth configuration unit 1706 is configured to allocate a resource and/or a power control configuration to the user equipment when receiving the D2D resource allocation request sent by the user equipment.

Preferably, the structure of the sending module 1602 is as shown in FIG. 18, and includes:

The signaling sending unit 1801 is configured to send the D2D resource allocation manner and/or D2D power control information by using broadcast signaling or dedicated signaling, where the dedicated signaling includes RRC signaling or MAC CE or PDCCH control signaling. Or the NAS message or the control signaling transmitted by the user plane, the RRC signaling is preferably an RRC connection setup signaling or an RRC connection reconfiguration signaling or a new RRC message, and the broadcast signaling is preferably an SIB.

Preferably, the structure of the fourth configuration unit 1704 is as shown in FIG. 19, and includes:

Adjustment subunit 1901, set to pause D2D transmission, or,

Adjusting the D2D resource allocation mode and/or the D2D power control information according to the interference situation, or determining whether the interfered cellular uplink control channel and/or the cellular uplink shared channel resource are adjacent to the D2D resource according to the location of the D2D resource/resource pool, in determining The result is that the base station monitors the D2D communication control resource in the proximity, parses the scheduling allocation information sent by the user equipment, and determines the user equipment that uses the D2D resource adjacent to the interfered cellular uplink control channel and/or the cellular uplink shared channel resource; The assembling subunit 1902 is configured to assemble a message including a D2D resource allocation manner and/or D2D power control information, and prepare to send to the user equipment.

The device-to-device communication interference avoidance device shown in Figures 16 through 19 can be integrated into any of the following network side devices:

Base station, D2D server, professional server, MME. The corresponding function of the device is completed by the network side device.

The device-to-device communication interference avoidance method of the foregoing technical solution, the user equipment acquires a D2D resource allocation manner and/or D2D power control information, and the user equipment performs D2D transmission by using the D2D resource allocation manner and/or D2D power control information. The user equipment can select an appropriate resource acquisition mode and corresponding transmission power according to requirements to ensure smooth progress of D2D transmission and uplink cellular transmission, and solve the problem of D2D transmission interference to cellular transmission.

It will be understood by those skilled in the art that all or part of the steps of the above embodiments may be implemented using a computer program flow, which may be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the embodiment is not limited to any particular A combination of hardware and software.

The various devices/function modules/functional units in the above embodiments may be implemented using a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

Each device/function module/functional unit in the above embodiments can be stored in a computer readable storage medium when implemented in the form of a software function module and sold or used as a standalone product. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Any changes or substitutions that may be easily conceived within the scope of the present invention are intended to be included within the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Industrial applicability

The device-to-device communication interference avoiding method and device, the user equipment acquiring the D2D resource allocation manner and/or the D2D power control information, where the user equipment uses the D2D resource allocation manner and/or the D2D power control information D2D transmission. The user equipment can select the appropriate resource acquisition mode and the corresponding transmission power according to the requirements to ensure the smooth progress of the D2D transmission and the uplink cellular transmission, and solve the problem that the D2D transmission interferes with the cellular transmission.

Claims

claims

1. A device-to-device (D2D) communication interference avoidance method, including:

The user equipment obtains the D2D resource allocation method and/or D2D power control information; and

The user equipment uses the D2D resource allocation method and/or D2D power control information to perform D2D transmission.

2. The device-to-device communication interference avoidance method according to claim 1, wherein the D2D resource allocation mode information includes at least one of the following:

Configuration information, resource information corresponding to the configuration, the scene in which the user equipment is located, and the state of the user equipment. The scene in which the user equipment is located includes a coverage scene and a non-coverage scene, and the user equipment state includes a connected state and an idle state.

3. The device-to-device communication interference avoidance method according to claim 2, wherein the configuration information includes at least one of the following:

Base station, mobile management entity (MME), professional server.

4. The device-to-device communication interference avoidance method according to claim 2, wherein the resource information includes: D2D discovery resources/resource pools, and/or D2D communication resources/resource pools; the D2D communication resources/resource pools Including D2D control resources/resource pools, and/or D2D data resources/resource pools.

5. The device-to-device communication interference avoidance method according to claim 3, wherein the resource allocation indication information includes: allowing or prohibiting the user equipment from using the allocation information to obtain D2D resources.

6. The device-to-device communication interference avoidance method according to claim 2, wherein the D2D power control information includes one of the following: The maximum transmit power level/threshold allowed by the user equipment for D2D transmission, the minimum transmit power level/threshold allowed by the user equipment for D2D transmission, the transmission allowed by the user equipment for D2D transmission on the allocated resources Power level/threshold/signal-to-noise ratio threshold/adjustment step size,

The transmission power level/signal-to-noise ratio threshold allowed for D2D transmission of the user equipment corresponding to the first resource allocation information and/or the second resource allocation information and the corresponding D2D resource,

The transmission power level/signal-to-noise ratio threshold/adjustment step allowed for D2D transmission of the user equipment for each resource allocation unit included in the corresponding D2D resources corresponding to the first resource allocation information and/or the second resource allocation information ,

The transmission power level/signal-to-noise ratio threshold/adjustment step allowed for D2D transmission of the user equipment corresponding to the first resource allocation information and/or the second resource allocation information, and the resource group corresponding to the corresponding D2D resource.

7. The device-to-device communication interference avoidance method according to claim 6, the method further comprising: when the D2D power control information includes the corresponding first resource allocation information and/or the second resource allocation information, and the corresponding When the transmission power level/signal-to-noise ratio threshold/adjustment step allowed by the user equipment for D2D transmission of the resource group corresponding to the D2D resource, the user equipment groups the D2D resources according to frequency domain and/or time domain positions, in different groups Power control is performed separately, where the result after grouping by frequency domain and/or time domain location is either of the following:

The two sidebands are one group, and the center is one group;

Specific physical resource blocks (PRBs) are one group, and the remaining PRBs are one group;

The sidebands at specific time domain positions are one group, the remaining PRBs at specific time domain positions are one group, and the remaining time domain positions are one group;

The specific time domain positions are one group, and the remaining time domain positions are one group;

Group according to the number of transfers.

8. The device-to-device communication interference avoidance method according to claim 1, wherein the user User equipment obtains D2D resource allocation methods and/or D2D power control information including:

The user equipment receives the D2D resource allocation method and/or D2D power control information from the base station; or, the user equipment obtains the D2D resource allocation and/or D2D power control information from the D2D server or professional server or MME; or,

The user equipment has built-in preconfigured D2D resource allocation method and/or D2D power control information.

9. The device-to-device communication interference avoidance method according to claim 8, wherein the user equipment receiving the D2D resource allocation method and/or D2D power control information from the base station includes:

The user equipment receives a message containing a D2D resource allocation method and/or D2D power control information sent by the base station. The message is sent through broadcast signaling or through dedicated signaling. The dedicated signaling includes Radio Resource Control (RRC). ) signaling or media access control control element (MAC CE) or physical downlink control channel (PDCCH) control signaling, where the RRC signaling is RRC connection establishment signaling or RRC connection reconfiguration signaling or a new RRC message, so The broadcast signaling is System Information Block (SIB).

10. The device-to-device communication interference avoidance method according to claim 1, wherein the user equipment uses the D2D resource allocation method and/or the D2D power control information to perform D2D transmission including:

The user equipment uses the D2D resource allocation method and/or D2D power control information to obtain D2D resources;

The user equipment uses the D2D power control information to determine D2D transmission transmission power; the user equipment uses the obtained D2D resources and/or the D2D transmission transmission power to perform D2D transmission.

11. The device-to-device communication interference avoidance method according to claim 10, wherein the user equipment uses the D2D resource allocation method to obtain D2D resources including:

The user equipment determines the selection of the resource according to the configuration information; or,

The user equipment determines the selection of the resource according to the resource information corresponding to the configuration; or, the user equipment determines the selection of the resource according to the scenario in which the user equipment is located.

12. The device-to-device communication interference avoidance method according to claim 11, wherein: The user equipment determines the selection of the resource based on the configuration information, including:

When obtaining the second resource allocation information, the user equipment uses the second resource allocation information to perform

D2D transmission;

When obtaining the first resource allocation information, the user equipment uses the first resource allocation information to perform D2D transmission; or

When the user equipment obtains the first resource allocation information and the second resource allocation information, the user equipment determines which resource to select for D2D transmission according to the resource allocation indication sent by the first transmission node.

13. The device-to-device communication interference avoidance method according to claim 11, wherein the user equipment determines the selection of the resource according to the resource information corresponding to the allocation method includes:

When the resource corresponding to the first resource allocation information is located in a specific area and the resource corresponding to the second resource allocation information is not located in the specific area, the user equipment selects the second resource allocation method, and the specific area is predefined. The PRB is located and adjacent to the uplink control channel (PUCCH)/uplink shared channel (PUSCH) resources of the cellular system;

When the resource corresponding to the second resource allocation information is located in the specific area and the resource corresponding to the first resource allocation information is not located in the specific area, the user equipment selects the first resource allocation mode;

When the resources corresponding to the first resource allocation information and the resources corresponding to the second resource allocation information are both located in the specific area, the user equipment selects resources farther from the specific area and the corresponding allocation method.

14. The device-to-device communication interference avoidance method according to claim 11, wherein the user equipment determines the selection of the resource according to the scenario in which the user equipment is located includes:

In a coverage scenario, the second resource allocation has a higher priority than the first resource allocation, and the user equipment preferentially selects the second resource allocation method; or,

The connected user equipment prefers the second resource allocation method; or,

The idle state user equipment prefers the first resource allocation method.

15. The device-to-device communication interference avoidance method according to claim 10, wherein: The user equipment uses the D2D power control information to obtain D2D resources including:

The user equipment selects D2D resources and corresponding resource allocation within the range of the maximum transmission power level or threshold and the minimum transmission power level or threshold allowed by the user equipment for D2D transmission. method, use the determined D2D resource allocation method to obtain D2D resources; or,

The user equipment corresponds to the transmission power level/information allowed by the user equipment D2D transmission of each resource allocation unit and/or resource group included in the D2D resources corresponding to the first resource allocation information and/or the second resource allocation information. Noise ratio threshold, determine D2D resources and resource subsets acceptable to the user equipment, and perform D2D resource acquisition based on the determined D2D resources and resource subsets.

16. The device-to-device communication interference avoidance method according to claim 15, wherein obtaining D2D resources according to the determined D2D resources and resource subsets includes:

The user equipment monitors the D2D resource pool or a subset of the D2D resource pool and obtains D2D transmission resources through competition; or

17. The device-to-device communication interference avoidance method according to claim 10, wherein the user equipment determines the D2D transmission transmit power according to the D2D power control information including:

The user equipment uses the maximum transmission power level or threshold allowed for D2D transmission as the D2D transmission transmission power; or,

The user equipment is based on the transmission power level/threshold allowed by the user equipment for D2D transmission, or the transmission power level allowed by the user equipment for D2D transmission corresponding to the D2D resources corresponding to the first resource allocation information and/or the second resource allocation information. /Threshold/adjustment step size, or another transmission power level allowed for D2D transmission of the user equipment corresponding to each resource allocation unit included in the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information. 'Threshold/adjustment The step size, or the transmission power level/threshold/adjustment step size allowed for D2D transmission of the user equipment corresponding to the resource group corresponding to the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information, is determined in the D2D transmission The D2D transmission transmission power within the maximum and minimum transmission power levels or thresholds allowed; or, the user equipment measures the path loss between the base station and the base station, and determines the D2D transmission transmission power allowed by the user equipment based on the path loss between the user equipment and the base station. An acceptable signal-to-noise ratio threshold, or corresponding to the first resource allocation information and/or the second resource allocation information.

The signal-to-noise ratio threshold allowed for user equipment D2D transmission of D2D resources, or the allowed D2D transmission of user equipment corresponding to each resource allocation unit included in the D2D resources corresponding to the first resource allocation information and/or the second resource allocation information. The signal-to-noise ratio threshold, or the signal-to-noise ratio threshold allowed for D2D transmission of the user equipment corresponding to the resource group corresponding to the D2D resource corresponding to the first resource allocation information and/or the second resource allocation information, determines the maximum allowed in D2D transmission And the D2D transmission transmit power within the minimum transmit power level/threshold range.

18. A device-to-device (D2D) communication interference avoidance method, including:

The network side device configures/obtains the D2D resource allocation method and/or D2D power control information; and the network side device delivers the D2D resource allocation method and/or to the corresponding user equipment.

D2D power control information instructs the user equipment to use the D2D resource allocation method and/or D2D power control information to perform D2D transmission.

19. The device-to-device communication interference avoidance method according to claim 18, wherein the network side device is any of the following:

Base station, D2D server, professional server, mobile management entity (MME).

20. The device-to-device communication interference avoidance method according to claim 18, wherein the network side device delivers the D2D resource allocation method and/or D2D power control information to the corresponding user equipment including:

The network side device sends the D2D resource allocation method and/or D2D power control information through broadcast signaling or proprietary signaling. The proprietary signaling includes radio resource control (RRC) signaling or media access control control. element (MAC CE) or physical downlink control channel (PDCCH) control signaling or non-access stratum (NAS) message or control signaling transmitted through the user plane. The RRC signaling is RRC connection establishment signaling or RRC connection re-establishment signaling. Configure signaling or a new RRC message, and the broadcast signaling is a system information block (SIB).

21. The device-to-device communication interference avoidance method according to claim 18, wherein when the network side device is a base station, the network side device configures/obtains the D2D resource allocation method and/or D2D power control information, including : The base station pre-configures D2D resource allocation method and/or D2D power control information; or,

The base station updates the configuration of the D2D resource allocation method and/or D2D power control information; or, the base station receives the authenticated D2D resource allocation method and/or D2D power control information from the MME when the UE accesses; or,

The base station detects that the cellular uplink control channel and/or the cellular uplink shared channel is interfered, and updates

D2D resource allocation method and/or D2D power control information; or,

The base station receives the power control problem report and allocates resources and/or power control configuration to the user equipment; or,

The base station receives the D2D resource allocation request sent by the user equipment, and allocates resources and/or power control configuration to the user equipment.

22. The device-to-device communication interference avoidance method according to claim 21, wherein the base station detects that the cellular uplink control channel and/or the cellular uplink shared channel is interfered, and updates the D2D resource allocation method and/or D2D power control information. include:

The base station suspends D2D transmission, or,

The base station adjusts the D2D resource allocation method and/or D2D power control information according to the interference situation, or the base station determines whether the interfered cellular uplink control channel and/or cellular uplink shared channel resources are consistent with the location of the D2D resource/resource pool. The D2D resource is adjacent. When the judgment result is adjacent, the base station monitors the D2D communication control resource, analyzes the scheduling allocation information sent by the user equipment, and determines to use the D2D resource adjacent to the interfered cellular uplink control channel and/or cellular uplink shared channel resource. user equipment;

The base station assembles a message containing a D2D resource allocation method and/or D2D power control information, and prepares to send it to the user equipment.

23. A device-to-device (D2D) communication interference avoidance device, including:

Information acquisition module, configured to obtain D2D resource allocation method and/or D2D power control information; and

A data transmission module configured to use the D2D resource allocation method and/or D2D power control information to perform D2D transmission.

24. The device to avoid device-to-device communication interference according to claim 23, wherein the information acquisition module includes:

The first acquisition unit is configured to receive the D2D resource allocation method and/or D2D power control information from the base station;

Second acquisition unit, set to obtain from D2D server or professional server or mobile management entity

(MME) Obtain D2D resource allocation and/or D2D power control information; and

The third acquisition unit is configured to have a preconfigured D2D resource allocation method and/or D2D power control information built into the user equipment.

25. The device to avoid device-to-device communication interference according to claim 23, wherein the data transmission module includes:

A resource acquisition unit configured to acquire D2D resources using the D2D resource allocation method and/or D2D power control information;

A power determination unit configured to use the D2D power control information to determine the D2D transmission transmit power; and

A transmission unit, configured to use the obtained D2D resources and/or the D2D transmission transmission power to perform D2D transmission.

26. A device to avoid device-to-device (D2D) communication interference, including:

The configuration module is configured to configure the D2D resource allocation method and/or D2D power control information; the delivery module is configured to deliver the D2D resource allocation method and/or D2D power control information to the corresponding user equipment to instruct the user equipment. Use the D2D resource allocation method and/or D2D power control information to perform D2D transmission.

27. The device-to-device communication interference avoidance device according to claim 26, wherein the device is integrated into any of the following network side devices:

Base station, D2D server, professional server, mobile management entity (MME).

28. The device to avoid device-to-device communication interference according to claim 26, wherein the delivery module includes: A signaling sending unit configured to send the D2D resource allocation method and/or D2D power control information through broadcast signaling or proprietary signaling. The proprietary signaling includes Radio Resource Control (RRC) signaling or media access. Control control element (MAC CE) or physical downlink control channel (PDCCH) control signaling, the RRC signaling is RRC connection establishment signaling or RRC connection reconfiguration signaling or a new RRC message, and the broadcast signaling is system information block (SIB).

29. The device to avoid device-to-device communication interference according to claim 26, wherein the configuration module includes:

The first configuration unit is configured to pre-configure the D2D resource allocation method and/or D2D power control information; the second configuration unit is configured to update the configuration of the D2D resource allocation method and/or D2D power control information;

The third configuration unit is configured to receive the authenticated D2D resource allocation method and/or D2D power control information from the MME when the UE accesses;

The fourth configuration unit is configured to update the D2D resource allocation method and/or D2D power control information when detecting that the cellular uplink control channel and/or the cellular uplink shared channel is interfered with;

The fifth configuration unit is configured to allocate resources and/or power control configuration to the user equipment when receiving a power control problem report; and

The sixth configuration unit is configured to allocate resources and/or power control configuration to the user equipment when receiving a D2D resource allocation request sent by the user equipment.

30. The device-to-device communication interference avoidance device according to claim 29, wherein the fourth configuration unit includes:

Adjust subunit, set to pause D2D transfer, or,

Adjust the D2D resource allocation method and/or D2D power control information according to the interference situation, or determine whether the interfered cellular uplink control channel and/or cellular uplink shared channel resources are adjacent to the D2D resource according to the location of the D2D resource/resource pool. The result is that the base station monitors the D2D communication control resources when in proximity, analyzes the scheduling allocation information sent by the user equipment, and determines the user equipment using the D2D resources adjacent to the interfered cellular uplink control channel and/or cellular uplink shared channel resources; and The assembling subunit is configured to assemble a message containing a D2D resource allocation method and/or D2D power control information, and prepare to send it to the user equipment.

31. A computer program, including program instructions, which when executed by a user equipment, cause the user equipment to perform the method described in any one of claims 1 to 17.

32. A carrier carrying the computer program of claim 31.

33. A computer program, including program instructions. When the program instructions are executed by a network-side device, the network-side device causes the network-side device to execute the method described in any one of claims 18 to 22.

34. A carrier carrying the computer program of claim 33.