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Resource scheduling method, device and system

A technology for resource scheduling and resource allocation information, applied in the field of resource scheduling methods, devices and systems, can solve the problems of inability to meet V2X requirements, shortened scheduling period, and large control overhead, so as to shorten the resource scheduling process, reduce overhead, and shorten application. The effect of resource time

Inactive Publication Date: 2017-07-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

V2X communication can be understood as vehicle-to-external device-to-device (D2D, Device-to-Device) communication. The difference between V2X communication and D2D communication in Release 12 (R12, Release 12) is that the speed of movement increases and the density of users increases. , high reliability requirements, and conventional D2D communication may not need to consider such harsh requirements. Therefore, the existing mechanism of D2D communication cannot meet the requirements of V2X, and must be optimized according to the characteristics of V2X
[0003] Due to the strict delay requirements of V2X, the scheduling cycle will be shortened, which will increase the overhead of the control channel, especially for periodic broadcast services, and the size of the V2X data packet will change slightly. For Mode 1 communication, it is under base station scheduling. It has good performance reliability and no resource collision, but the control overhead between the base station (eNB, evolved Node B) and the V2X user equipment is too large, so the semi-constant scheduling (SPS) of the long-term evolution (LTE, Long Term Evolution) , Semi-Persistent Scheduling) applied in V2X can effectively reduce the control overhead, so it is an inevitable trend to study the application and improved process of SPS in V2X

Method used

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  • Resource scheduling method, device and system

Examples

Experimental program
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Embodiment 1

[0071] In this embodiment, the UE uses the SR resources allocated by the base station to request for V2X resources.

[0072] Specifically, refer to Figure 4 , the implementation process of this embodiment is as follows:

[0073] (1) The V2X user equipment (UE) learns the physical uplink control channel (PUCCH, Physical Uplink Control CHannel) 1 resource configured in the sr-PUCCH-ResourceIndex field of IE:SchedulingRequestConfig according to the radio resource control (RRC, Radio ResourceControl) signaling, and obtains The location and period of its resource scheduling request (SR, Scheduling Request).

[0074] (2) The UE makes a V2X resource request by using the SR resources for which there is no uplink acknowledgment information (ACK / NACK) feedback.

[0075] Optionally, according to the requested data packet size, if the configuration data packet is two types (190B and 300B), the data packet size is configured as 1 bit (bit), and the data packet is [0, 1], for example, 0 ...

Embodiment 2

[0113] In this embodiment, the UE uses the SPS-R resources allocated by the base station to request for V2X resources.

[0114] Among them, the SPS-R resource is time-divided with the SR resource. It is dedicated to V2X user equipment through IE configuration. The SPS-R resource period and resource location are configured by the base station. SPS-R can also be configured on a dedicated V2X resource pool.

[0115]In order to improve the user multiplexing degree of SPS-R resources, for the normal cyclic prefix, each slot (slot) has 7 single-carrier frequency division multiple access (SC-FDMA, Single-carrier Frequency-Division Multiple Access) symbols, Each SC-FDMA symbol will generate a sequence of 12 (corresponding to 12 subcarriers of 1 resource block (RB, Resource Block)), which is cyclically shifted by a cell-specific frequency domain sequence of length 12 Obtained (one RB supports up to 12 cyclic shifts in the frequency domain), three SC-FDMA symbols in one uplink resource ...

Embodiment 3

[0156] In this embodiment, the four orthogonal sequences allocated by LTE to PUCCH format1 / 1a / 1b are allocated to the same V2X user equipment, that is, the orthogonal sequences allocated to the V2X user equipment will not be multiplexed with other user equipment.

[0157]In order to increase the number of multiplexing users on SR resources, the original LTE, for the normal cyclic prefix, each slot has 7 SC-FDMA symbols, and each SC-FDMA symbol will generate a sequence of 12 (corresponding to 12 subcarriers), the sequence is obtained by cyclically shifting a cell-specific frequency domain sequence with a length of 12 (one RB supports at most 12 cyclic shifts in the frequency domain), and three SC- The FDMA symbols are used to send DMRS, and the remaining 4 SC-FDMA symbols are used to send PUCCH format1 / 1a / 1b. In order to increase the number of multiplexable PUCCH format1 / 1a / 1b UEs per RB, in the time domain, the modulation symbols are multiplied by an orthogonal sequence of len...

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Abstract

The invention discloses a resource scheduling method, device and system. The method comprises the steps that a base station receives a V2X (Vehicle-to-X) semi-persistent scheduling request sent by V2X user equipment on a preset resource; and the base station learns a size of a data packet requested by the V2X user equipment according to the V2X semi-persistent scheduling request and schedules a V2X resource to the V2X user equipment according to the size of the requested data packet. According to the resource scheduling method, device and system disclosed by the invention, a demand of V2X communication for low time delay can be satisfied.

Description

technical field [0001] The present invention relates to a Long Term Evolution Vehicle-to-X (LTE-V2X, Long Term Evolution Vehicle-to-X) communication network, in particular to a resource scheduling method, device and system. Background technique [0002] Vehicle-to-external (V2X, Vehicle-to-X) includes vehicle-to-vehicle (V2V, Vehicle-to-Vehicle), vehicle-to-equipment (V2I / N, Vehicle-to-Infrastructure / Network) and vehicle-to-person (V2P, Vehicle-to-Vehicle -to-Pedestrian). V2X communication can be understood as vehicle-to-external device-to-device (D2D, Device-to-Device) communication. The difference between V2X communication and D2D communication in Release 12 (R12, Release 12) is that the speed of movement increases and the density of users increases. , high reliability requirements, and conventional D2D communication may not need to consider such harsh requirements. Therefore, the existing mechanism of D2D communication cannot meet the requirements of V2X and must be opti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12
CPCH04W72/543H04W72/20H04W72/04H04W72/12
Inventor 王文焕卢有雄黄双红杨瑾
Owner ZTE CORP
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