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Non-orthogonal multiple access method based on scheduling and competition fine-grained fusion

A non-orthogonal multiple access and access method technology, applied in the field of non-orthogonal multiple access, can solve the problems of restricting network capacity, spectrum utilization and service quality, and achieve multi-user diversity gain and improve network The effect of capacity

Inactive Publication Date: 2017-06-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the deficiencies of the existing technology and solve the problems of the existing technology restricting the network capacity, spectrum utilization and service quality, the present invention proposes a non-orthogonal multiple access method based on fine-grained integration of scheduling and competition. The resources used for scheduling access and the resources for users to compete for access are not separated, so that the resources of the two access methods are completely shared. While scheduling some user equipment for transmission, other user equipment is allowed to use the same spectrum resources. Access through random competition, which is conducive to the matching of dynamically changing needs and resources, and is conducive to multi-user diversity gain, thereby significantly improving network capacity, spectrum utilization, and service quality

Method used

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  • Non-orthogonal multiple access method based on scheduling and competition fine-grained fusion
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  • Non-orthogonal multiple access method based on scheduling and competition fine-grained fusion

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specific Embodiment 1

[0041] Such as figure 1 As shown, the embodiment side focuses on implementing the scheduling and competition fine-grained fusion method proposed by the present invention in the SCMA-based cellular network. In order to ensure compatibility, the wireless frame structure of this embodiment follows the fourth generation mobile communication system (4G) specification.

[0042]Step 1: At the beginning of each wireless frame scheduling period, the BS first sets the ratio of uplink and downlink time slots, and then proceeds to step 2;

[0043] Step 2: The BS calculates the time-frequency resource (Resource Block, RB) position that needs to be occupied by the scheduling-competition integrated access mode in the uplink time slot, and allocates the uplink RB for the scheduled user equipment, and the allocated RB is consistent with the scheduling- The RB overlap occupied by the competitive converged access mode is transferred to step 3;

[0044] Step 3: The BS broadcasts the resource al...

specific Embodiment 2

[0054] Such as image 3 As shown, Embodiment 2 is based on the implementation method of Embodiment 1. The difference is that Embodiment 3 introduces uplink and downlink full-duplex technology. Therefore, in Embodiment 3, uplink scheduling, downlink scheduling, and contending users share the same RB resource.

[0055] Step 1: At the beginning of each wireless frame scheduling period, the BS first sets the ratio of uplink and downlink time slots, and then proceeds to step 2;

[0056] Step 2: The BS calculates the RB positions required by the integrated scheduling-competition access mode in the uplink time slot, and allocates uplink RBs and downlink RBs to the scheduled user equipment, and the allocated RBs are consistent with the integrated scheduling-competition access mode The occupied RBs overlap and go to step 3;

[0057] Step 3: The BS broadcasts the resource allocation result through the PDCCH, indicates the RB position occupied by the scheduling-competition integrated ac...

specific Embodiment 3

[0063] Such as Figure 4 As shown, the third embodiment focuses on implementing the scheduling and contention fine-grained fusion method proposed by the present invention in a cellular network based on power Non-orthogonal Multiple Access (NOMA).

[0064] Step 1: For the same time slot, frequency and spatial stream, the BS divides resources into N power layers (Power Layer) from the power domain for multiple user equipments to send uplink data, each power layer corresponds to a different transmission power, Then go to step 2;

[0065] Step 2: The BS directly schedules a part of the power layers to corresponding uplink user equipments through downlink control signaling, and proceeds to step 3.

[0066] Step 3: The BS assigns the subset power layers of the remaining power layers in step 2 to the competing access uplink user equipment through the downlink control signaling, and proceeds to step 4 for the scheduled users, and transfers to step 5 for the contending access users; ...

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Abstract

The invention provides a non-orthogonal multiple access method based on scheduling and competition fine-grained fusion and relates to the communication technology field. According to the method, a resource region and the resource position occupied in a scheduling-competition fusion access mode are calculated, resource distribution for a scheduling user is further carried out, resource distribution indication frames are sent by a center node to user equipment of a present cell, the information sent by the scheduling user and a competition user is finally superposed on the time frequency resource through scheduling-competition fusion access, and the superposed information is analyzed at a reception end in a combined multi-user detection mode. The method is advantaged in that scheduling access and competition access are employed to share the same frequency spectrum resource, so fine-grained fusion in two access modes is realized, dynamic change demand and resource matching is facilitated, multi-user diversity gain is facilitated, and thereby network capacity, a frequency spectrum utilization rate and service quality are substantially improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a non-orthogonal multiple access method. Background technique [0002] In recent years, with the rapid development of mobile wireless communication technology and computer science, the mobile Internet is profoundly affecting people's work and study, and continues to penetrate into various fields. As the core of mobile wireless communication technology, multiple access technology, also known as Media Access Control (MAC), is responsible for how multiple user equipment (UserEquipment, UE) efficiently share and use the increasingly scarce wireless spectrum resource. Therefore, the efficiency of the MAC technology directly affects key performance indicators (Key Performance Indicator, KPI) of the mobile wireless network: network capacity, number of network connections, and spectrum utilization. [0003] The next-generation mobile wireless network needs to meet the requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W74/02
CPCH04W74/02H04W72/23
Inventor 杨懋李波白志城梁玉生闫中江左晓亚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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