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Device-to-device communication and its resource allocation method and device
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A communication method and equipment technology, which is applied in the field of communication and can solve problems such as the lack of guarantee of communication quality
Active Publication Date: 2019-02-12
DATANG MOBILE COMM EQUIP CO LTD
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[0023] To sum up, in the current UE-to-Network Relay scenario, the Remote UE is outside the coverage of the base station and can only use pre-configured D2D resources, and its communication quality cannot be guaranteed.
Method used
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Embodiment 1
[0154] Embodiment 1: The Relay UE monitors the communication quality of the PC5 interface, and judges whether it needs to apply for D2D dedicated resources from the network.
[0155] The flow of this embodiment is as follows Figure 8 shown, including:
[0156] Step S801: the Remote UE and the Relay UE have established a D2D communication connection and start to transmit service data.
[0157] Step S802: the Relay UE performs quality measurement on the PC5 interface, and the obtained measurement results include, for example, BLER, and / or received power of uplink signals, and / or uplink interference power.
[0158] Step S803: The Relay UE statistically determines that the communication quality of the PC5 interface is relatively poor according to the measurement results in step S802, and then sends a D2D dedicated resource request message to the network side, which may carry quality measurement results, service-related information, and / or buffers Occupancy information etc.
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Embodiment 2
[0163] Embodiment 2: The Remote UE determines that the communication quality of the PC5 interface is relatively poor, and reports to the Relay UE to trigger the Relay UE to apply for D2D dedicated resources from the network.
[0164] The flow of this embodiment is as follows Figure 9 shown, including:
[0165] Step S901: the same as step S801 in Embodiment 1, that is, the Remote UE and the Relay UE have established a D2D communication connection and started to transmit service data.
[0166] Step S902: The Remote UE performs quality measurement on the PC5 interface, for example, BLER, and / or downlink signal received power, and / or downlink interference power measurement.
[0167] Step S903: When the measurement result obtained by the Remote UE meets a certain condition, for example, the relevant measurement is lower than the preset threshold or higher than the preset threshold, a measurement report is initiated, and the measurement event or measurement result is reported to t...
Embodiment 3
[0174] In Embodiment 2, when the Remote UE executes step S902, it can also determine that it needs D2D dedicated resources according to the measurement results. In step S903, it directly applies for D2D dedicated resources to the Relay UE, that is, sends a D2D dedicated resource request message to the Relay UE, It carries information such as the measurement result, the BSR on the PC5 interface of the Remote UE and the Relay UE, and the like. Subsequent steps are the same as in Example 2.
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Abstract
The invention discloses a device-to-device communication and its resource allocation method and device, which are used to realize D2D communication through D2D dedicated resources and ensure the quality of D2D communication. A device-to-device D2D communication method provided by the present invention includes: a first user equipment UE receives a D2D dedicated resource sent by a second UE; the first UE communicates with the second UE using the D2D dedicated resource Signal transmission. During the D2D communication process of the present invention, the first UE receives the D2D dedicated resources sent by the second UE, and the first UE can use the D2D dedicated resources to perform signal transmission with the second UE, so that when the first UE is outside the coverage of the base station , the D2D dedicated resource can be obtained by the second UE and the D2D dedicated resource can be used to perform D2D communication with the second UE, thereby ensuring the quality of the D2D communication.
Description
technical field [0001] The present invention relates to the field of communication technologies, and in particular to a device-to-device (Device to Device, D2D) communication and resource allocation method and device thereof. Background technique [0002] In the future development of the mobile communication system, in order to better meet user needs, a D2D discovery (Device to Device Discovery) mechanism and a D2D communication (Device to Device Communication) mechanism are introduced. For an off-network user equipment (User Equipment, UE), in order to enable it to communicate with the network, an adjacent on-network UE can be selected for the off-network UE to transfer data for it. This scenario is called user equipment to network intermediary. Following (UE-to-NetworkRelay). In current D2D communication, for a UE that is offline (also referred to as a Remote UE), D2D communication can only use pre-configured public resources (common resources for D2D communication). In ...
Claims
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