JP-7855449-B2 - Communication systems and communication methods

JP7855449B2JP 7855449 B2JP7855449 B2JP 7855449B2JP-7855449-B2

Inventors

小畑晴香
鍋谷寿久
荒井甲
辰村光介
後藤隼人
酒井良哲

Assignees

株式会社東芝

Dates

Publication Date: 20260508
Application Date: 20220726

Claims (14)

A base station that communicates with terminals according to a communication standard, The system comprises an allocation determination device that receives an allocation request from the base station and determines the resources to be used for the communication, The aforementioned allocation request includes a first request and a second request, Each of the first and second requests includes identification information of the terminal, reference information relating to the terminal, and information representing the start time of the allocation process. The aforementioned reference information includes the allowable delay time for data transmitted and received by the terminal, the communication quality of data previously transmitted and received by the terminal, or information regarding the amount of data transmitted by the terminal. The assignment determination device comprises a first assignment determination unit that executes a first process in response to the first request and generates first assignment information , and a second assignment determination unit that executes a second process different from the first process in response to the second request and generates second assignment information . The first assignment determination unit outputs the first assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . The second assignment determination unit outputs the second assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . If either the first assignment information or the second assignment information satisfies the constraints defined by the communication standard, the assignment determination device transmits the first assignment information or the second assignment information that satisfies the constraints to the base station. The base station communicates with the terminal using the resources corresponding to the first assignment information or the second assignment information transmitted from the assignment determination device. The first assignment determination unit searches for the first assignment information within the first search range, The second assignment determination unit searches for the second assignment information within the second search range, A communication system in which the first search range is wider than the second search range.
A base station that communicates with terminals according to a communication standard, The system comprises an allocation determination device that receives an allocation request from the base station and determines the resources to be used for the communication, The allocation determination device comprises a first allocation determination unit and a second allocation determination unit that performs processing different from that of the first allocation determination unit. The first allocation determination unit determines the first allocation information from all combinations of terminals and resources, The second allocation determination unit determines the second allocation information from a subset of all combinations of terminals and resources. The first assignment determination unit outputs the first assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . The second assignment determination unit outputs the second assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . If either the first assignment information or the second assignment information satisfies the constraints defined by the communication standard, the assignment determination device transmits the first assignment information or the second assignment information that satisfies the constraints to the base station. The base station is a communication system that communicates with the terminal using resources corresponding to the first allocation information or the second allocation information transmitted from the allocation determination device.
The communication system according to claim 1 or 2, wherein the resource is at least one of time, frequency, space, power, code, and orbital angular momentum.
The allocation determination device is, The communication system according to claim 1 or 2, wherein if the first assignment information and the second assignment information satisfy the constraints, the first assignment information or the second assignment information which has a higher evaluation according to a predetermined evaluation method is transmitted to the base station.
The communication system according to claim 4, wherein the predetermined evaluation method gives a higher evaluation for better transmission efficiency, shorter delay time, higher fairness between terminals, or higher delay achievement rate.
The probability that the first assignment information is valued higher than the second assignment information is higher than the probability that the second assignment information is valued higher than the first assignment information. The communication system according to claim 1 or 2, wherein the probability that the second assignment information satisfies the constraint is higher than the probability that the first assignment information satisfies the constraint.
The first assignment determination unit searches for the first assignment information within the first search range, The second assignment determination unit searches for the second assignment information within the second search range, The communication system according to claim 2, wherein the first search range is wider than the second search range.
The first allocation determination unit determines the first allocation information from all combinations of terminals and resources, The communication system according to claim 1, wherein the second allocation determination unit determines the second allocation information from a subset of all combinations of terminals and resources.
The aforementioned allocation determination device comprises a first allocation determination device and a second allocation determination device. The first allocation determination device determines the resources relating to the first type of terminal, The second allocation determination device determines the resources relating to the second type of terminal, The communication system according to claim 1 or claim 2, wherein the first type of terminal and the second type of terminal have different requirements regarding communication capacity or latency.
The aforementioned allocation determination device further comprises a third allocation determination unit, The third assignment determination unit outputs the third assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . The communication system according to claim 1 or 2, wherein the allocation determination device outputs to the base station the one among the first allocation information, the second allocation information, and the third allocation information that satisfies the constraints or has a high evaluation.
The communication system according to claim 1 or 2, wherein the aforementioned communication standard is a standard for fifth-generation mobile communication systems.
A resource block consists of multiple symbols in the time direction and multiple subcarriers in the frequency direction. A mini-slot consists of two or more symbols that are part of the aforementioned multiple symbols, and multiple sub-carriers. The communication system according to claim 1 or claim 2, wherein the first allocation information and the second allocation information represent the allocation of resource elements to the terminal in mini-slot units.
A base station that communicates with terminals according to a communication standard, The system comprises an allocation determination device that receives an allocation request from the base station and determines the resources to be used for the communication, The aforementioned allocation request includes a first request and a second request, Each of the first and second requests includes identification information of the terminal, reference information relating to the terminal, and information representing the start time of the allocation process. The aforementioned reference information includes the allowable delay time for data transmitted and received by the terminal, the communication quality of data previously transmitted and received by the terminal, or information regarding the amount of data transmitted by the terminal. The aforementioned assignment determination device comprises a first assignment determination unit that executes a first process in response to a first request and generates first assignment information , and a second assignment determination unit that executes a second process different from the first process in response to a second request and generates second assignment information , and is a communication method for a communication system, The first assignment determination unit outputs the first assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . The second assignment determination unit outputs the second assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . If either the first assignment information or the second assignment information satisfies the constraints defined by the communication standard, the assignment determination device transmits the first assignment information or the second assignment information that satisfies the constraints to the base station. The base station communicates with the terminal using the resources corresponding to the first assignment information or the second assignment information transmitted from the assignment determination device. The first assignment determination unit searches for the first assignment information within the first search range, The second assignment determination unit searches for the second assignment information within the second search range, A communication method wherein the first search range is wider than the second search range.
A base station that communicates with terminals according to a communication standard, The system comprises an allocation determination device that receives an allocation request from the base station and determines the resources to be used for the communication, The aforementioned assignment determination device comprises a first assignment determination unit and a second assignment determination unit that performs processing different from that of the first assignment determination unit, and is a communication method for a communication system. The first allocation determination unit determines the first allocation information from all combinations of terminals and resources, The second allocation determination unit determines the second allocation information from a subset of all combinations of terminals and resources. The first assignment determination unit outputs the first assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . The second assignment determination unit outputs the second assignment information during the time from the start time of the assignment determination process to the start time of the assignment process . If either the first assignment information or the second assignment information satisfies the constraints defined by the communication standard, the assignment determination device transmits the first assignment information or the second assignment information that satisfies the constraints to the base station. A communication method comprising the base station communicating with the terminal using resources corresponding to the first allocation information or the second allocation information transmitted from the allocation determination device.

Description

Embodiments of the present invention relate to a communication system and a communication method. In a wireless communication system, multiple terminals communicate simultaneously. The wireless communication system includes a resource allocation device that allocates resources for communication to the terminals. A terminal wishing to initiate wireless communication sends an allocation request to the resource allocation device. The resource allocation device allocates resources to the multiple terminals that sent the allocation requests and outputs the resource allocation results to each terminal. Each terminal then uses its allocated resources to conduct wireless communication. Wireless communication systems are subject to various requirements, including high speed, large capacity, high reliability, and low latency. Resource allocation devices are required to perform resource allocation processing while considering these requirements. Keishi Hanakago, Ryo Takahashi, Takahiro Oyama, and Fumiyuki Adachi, "A Study on Inter-Cluster Interference Control in Distributed Antenna Networks Using Quantum Computing," IEICE Technical Report (RCS2021-77), July 2021, pp. 1-6. A diagram illustrating an example of a communication system according to the embodiment.A diagram illustrating an example of a control device.A diagram illustrating an example of the first and second allocation determination units.A diagram illustrating an example of the frame structure of a modulated signal in a fifth-generation mobile communication system.A diagram illustrating the first example of resource block placement.A diagram illustrating a second example of resource block placement.A diagram illustrating a third example of resource block placement.A diagram illustrating an example of resource block configuration and mini-slot allocation.A diagram illustrating the timing of the allocation process.A diagram illustrating the first example of setting the first and second time zones.A diagram illustrating a second example of setting the first and second time zones.A flowchart illustrating an example of the control device's processing.A flowchart illustrating an example of the control device's processing.A diagram illustrating an example of the format for describing allocation information.A diagram illustrating an example of the format of assignment information.A diagram illustrating an example of the first and second allocation determination units.A diagram illustrating other examples of the first and second allocation determination units.A diagram illustrating an example of a communication system relating to the first modified example.A diagram illustrating an example of a communication system relating to the second modified example.A diagram illustrating an example of a communication system relating to the third modified example.A diagram illustrating an example of a communication system related to the fourth modified example.A diagram illustrating an example of a communication system related to the fifth modified example.A diagram illustrating a modified configuration of the allocation determination device.A diagram illustrating other variations of the configuration of the allocation determination device. The embodiments will be described below with reference to the drawings. The following description illustrates devices and methods for realizing the technical concept of the embodiments, and the technical concept of the embodiments is not limited to the structure, shape, arrangement, material, etc., of the components described below. Modifications that a person skilled in the art can easily conceive are naturally included within the scope of disclosure. For clarity, the drawings may schematically represent the size, thickness, planar dimensions, or shape of each element, modified from those of the actual embodiments. Multiple drawings may include elements with different dimensional relationships and ratios. In multiple drawings, corresponding elements may be given the same reference numerals to omit redundant descriptions. Some elements may be given multiple designations; however, these designations are merely illustrative examples and do not preclude the use of other designations for these elements. Similarly, elements without multiple designations may also be given other designations. Furthermore, in the following description, "connection" may include not only direct connections but also connections via other elements. The following description of this embodiment will be given in detail with reference to the drawings. Figure 1 is a diagram illustrating an example of a communication system 10 according to an embodiment. Examples of communication systems include IEEE 802.11 standard wireless LANs, and third-generation mobile communication systems (3G), fourth-generation mobile communication systems (4G or LTE-Advanced), and fifth-generation mobile communication systems (5G) standardized under the Third Generation Partnership Project (3GPP) (r