A noma cellular heterogeneous network resource allocation method and system

A technology of heterogeneous network and resource allocation, applied in the field of wireless communication, can solve the problem of not meeting the needs of future communication

Active Publication Date: 2020-07-24
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the explosive growth of smart devices and the rapid rise of various media services, traditional cellular networks and traditional Orthogonal Multiple Access (OMA) solutions can no longer meet the needs of future communications

Method used

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  • A noma cellular heterogeneous network resource allocation method and system
  • A noma cellular heterogeneous network resource allocation method and system
  • A noma cellular heterogeneous network resource allocation method and system

Examples

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no. 1 example

[0052] see figure 1 , this embodiment provides a NOMA cellular heterogeneous network resource allocation method, which improves system user access capabilities under the condition of ensuring user QoS requirements; wherein, the NOMA cellular heterogeneous network scenario described in this embodiment is as follows figure 2 As shown in , the macro cell and the micro cell occupy the same time-frequency resources, and the base station always has information to transmit to the user, that is, a saturated scenario. Cellular users are randomly distributed in the cell, and their channels obey the Rayleigh distribution and are independent of each other. And because the present invention relates to the same time-frequency resources occupied by the macro cell and the micro cell, there are also normal communication links between the macro base station and the macro cell user, and between the micro base station and the micro cell user. Interference links between cell users and between ma...

no. 2 example

[0095] Correspondingly, in order to achieve the above purpose, the present invention also provides a NOMA cellular heterogeneous network resource allocation system in the scenario where the cellular heterogeneous network introduces the NOMA technology, including:

[0096] The NOMA group construction module is used to filter users who meet the preset conditions into a group according to the user pairing strategy based on the different service quality requirements of different service users and the channel quality difference, and build NOMA groups in macro cells and micro cells;

[0097] The optimal power solution module is used to randomly select the NOMA group users of one of the sub-channels according to the constructed NOMA group as the research object, aiming at maximizing and minimizing the actual rate / target rate of users in the macro cell and the micro cell, using binary The optimal power shared by each user in the sub-channel is obtained by combining the method and linea...

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Abstract

The invention provides a NOMA cellular heterogeneous network resource allocation method and system, and the method comprises the steps: screening users meeting conditions according to a user pairing strategy based on different service quality requirements of different business users and the channel quality difference, and constructing a NOMA group; randomly selecting a NOMA group user of one sub-channel from the constructed NOMA group as a research object, taking the maximum and minimum actual rate / target rate of the user in the macro cell and the micro cell as a target, and obtaining the optimal power distributed by each user in the sub-channel in a mode of combining a bisection method and linear programming; and based on the obtained optimal power distributed by each user in the sub-channel and the service quality requirements of each user, dynamically adjusting the users in the NOMA group corresponding to the sub-channel according to the requirements by using a user scheduling mechanism, and ensuring that the service quality requirements of each user are met. According to the invention, reasonable distribution of resources can be promoted, and the user access capability of the system is improved under the condition that the service quality requirement of an access user is met.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a NOMA cellular heterogeneous network resource allocation method and system. Background technique [0002] With the explosive growth of smart devices and the rapid rise of various media services, traditional cellular networks and traditional Orthogonal Multiple Access (OMA) solutions can no longer meet the needs of future communications. Introducing non-orthogonal multiple access (NOMA) technology into traditional cellular networks can help improve transmission speed, improve system user access capabilities, and reduce delay. [0003] Most of the existing NOMA cellular heterogeneous network resource allocation technologies are based on the same user quality of service (QoS) requirements, aiming at maximizing system capacity, energy efficiency, and minimizing outage probability. However, in practice, different users have different QoS requirements due to di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/02
CPCH04W28/0221H04W28/0268Y02D30/70
Inventor 陈月云刘扬宇杨美婕
Owner UNIV OF SCI & TECH BEIJING
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