D2D discovery signal resource allocation method and system and related devices

A technology for discovering signals and resource allocation, applied in wireless communication, electrical components, etc., can solve the problems of missing detection, huge overhead, occupying wireless resources, etc., and achieve the effects of avoiding mutual blindness, improving user experience, and ensuring discovery efficiency

Inactive Publication Date: 2014-11-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical indicators to measure the efficiency and effect of the D2D discovery process mainly include discovery time, discovery quantity, and discovery success rate. In order to meet the above performance indicators, it is usually necessary to increase the sending opportunities of D2D discovery signals and shorten the sending cycle of D2D discovery signals. To achieve the purpose of being able to carry a large number of D2D devices for D2D discovery signal transmission in a short time, but this will undoubtedly occupy a large amount of wireless resources, bring huge overhead and affect the cellular network transmission in the area
In addition, this will also cause the transmission of D2D discovery signals to be very concentrated. When a D2D device is transmitting D2D signals, it is likely to miss the detection of other D2D discovery signals, resulting in omissions.

Method used

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  • D2D discovery signal resource allocation method and system and related devices
  • D2D discovery signal resource allocation method and system and related devices
  • D2D discovery signal resource allocation method and system and related devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] In an LTE FDD network that supports the D2D discovery function, in the current time window, the traffic load of the cellular network is low, and the number of users who initiate D2D device discovery applications is relatively large. Therefore, the network considers allocating more intensive resources when configuring public resources D2D discovers signal resources to increase the number of D2D devices that users can discover in a short period of time without causing too much impact on the experience of cellular network users.

[0128] The D2D discovery cycle configuration table involved in this embodiment is shown in Table 1:

[0129] Cycle Configuration Index

cycle length

0

5ms

1

10ms

2

20ms

3

40ms

4

80ms

[0130] Table 1

[0131] Specifically, the base station selects a smaller period value of 10 ms in the preset D2D discovery period configuration table (Table 1) for configuration, and notifie...

Embodiment 2

[0138] In an LTE FDD network that supports the D2D discovery function, in the current time window, the traffic load of the cellular network is high, and the number of users who initiate D2D device discovery applications is small, so the system considers the allocation of public resources to be sparser D2D discovery signal resources are used to ensure the service support for D2D discovery users, and will not cause too much impact on the experience of cellular network users.

[0139] The D2D discovery cycle configuration table involved in this embodiment is shown in Table 2:

[0140] Cycle Configuration Index

cycle length

0

320ms

1

640ms

2

1280ms

[0141] Table 2

[0142] Specifically, the base station selects a longer period value of 640ms in the preset D2D discovery period configuration table (Table 2) for configuration, and notifies the corresponding period configuration index "1" to the D2D discovery period in the cell th...

Embodiment 3

[0152] In an LTE FDD network that supports D2D discovery, the traffic load of the cellular network is high in the current time window, and the number of users who initiate D2D device discovery applications is small. Therefore, the base station considers the allocation of public resources to be more sparse D2D discovery signal resources are used to ensure the service support for D2D discovery users, and will not cause too much impact on the experience of cellular network users.

[0153] The D2D discovery cycle configuration table involved in this embodiment is shown in Table 3:

[0154] Cycle Configuration Index

cycle length

0

320ms

1

640ms

2

1280ms

3

5120ms

[0155] table 3

[0156] Specifically, the base station selects a longer period value of 1280 ms in the preset D2D discovery period configuration table (Table 3) for configuration, and notifies the corresponding period configuration index "2" to the D2D disco...

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Abstract

The invention discloses a D2D discovery signal resource allocation method and system and related devices. The D2D devices receive system broadcast messages carrying public D2D discovery signal resource allocation information, and the public D2D discovery signal resource allocation information comprises a D2D discovery cycle and a public D2D discovery signal resource set; the D2D devices detect D2D discovery signals on corresponding public D2D discovery signal resources according to the public D2D discovery signal resource allocation information. According to the D2D discovery signal resource allocation method and system and the related devices, a base station can regulate the number and distribution of the D2D discovery signal resources according to network conditions and / or terminal device conditions, and therefore occupancy and interference, caused by the D2D discovery signals, on resources of a cellular network are strictly controlled while the discovery efficiency of the D2D devices is guaranteed. Besides, by means of D2D discovery signal resource allocation, the situation that the D2D devices initiating D2D discovery at the same time cannot discover one another can be avoided, and user experience can be prompted.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a D2D discovery signal resource configuration method, system and related devices. Background technique [0002] Device-to-Device (D2D) technology is a new technology for mutual discovery and communication between two or more wireless communication terminal devices in a short distance. figure 1 It is a schematic diagram of D2D technology application scenarios, such as figure 1 As shown, the D2D technology can be applied to a scenario with network coverage, a scenario without network coverage, or a scenario with half network coverage. [0003] D2D technology can be divided into D2D discovery technology and D2D communication technology. Among them, D2D discovery technology can support a D2D device to detect the existence of other D2D devices within a short range and identify their identity information; D2D communication technology can support short-distance Various form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
Inventor 梁枫吴栓栓杨瑾袁明贺海港李运锋袁弋非戴博
Owner ZTE CORP
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