CN108632866B - Resource occupation conflict processing method and base station - Google Patents
Resource occupation conflict processing method and base station Download PDFInfo
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- CN108632866B CN108632866B CN201710173703.8A CN201710173703A CN108632866B CN 108632866 B CN108632866 B CN 108632866B CN 201710173703 A CN201710173703 A CN 201710173703A CN 108632866 B CN108632866 B CN 108632866B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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Abstract
A method and a base station for processing resource occupation conflict are provided. The method comprises the following steps: detecting whether the resource occupation conflict rate on the preset resources exceeds a preset threshold value or not; and when the conflict rate of the occupied resources exceeds a preset threshold value, sending resource occupation limiting control information to all terminals in the cell under the jurisdiction through downlink control information at a preset position before all terminals in the cell under the jurisdiction use the preset resources so as to limit partial terminals in the cell under the jurisdiction from using the preset resources. By applying the scheme, the problem of serious resource waste in the conventional resource occupation conflict processing method can be solved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a base station for processing resource occupation conflicts.
Background
In the fourth generation wireless cellular network communication system (4G), a terminal initiates random access and accesses a network through 4 times of signaling interaction with a base station. This process is referred to as a 4-step Random Access (4-step Random Access) process.
In the 4-step random access process, at the same time, multiple terminals in a cell managed by the base station may use the same resource to send uplink data to the base station, and resource conflict exists among the multiple terminals.
In order to handle resource collision among multiple terminals, in 4G, the base station may transmit random Access Barring (AB) control Information to the terminal through a System Information Block (SIB) 2 that is periodically broadcast, so as to restrict random Access of the terminal.
However, when the AB control information changes, the terminal needs to receive the updated system message again from the next change period, which results in a long time for the updated AB control information to be notified to the terminal, and thus the waste of radio resources is serious.
Disclosure of Invention
The embodiment of the invention aims to solve the problem of serious resource waste in the conventional resource conflict processing method.
In order to solve the above problem, an embodiment of the present invention provides a method for processing resource occupation conflicts, where the method includes: detecting whether the resource occupation conflict rate on the preset resources exceeds a preset threshold value or not; and when the resource occupation conflict rate on the preset resource exceeds a preset threshold value, sending resource occupation limiting control information to all terminals in the cell under the jurisdiction through downlink control information at a preset position before all terminals in the cell under the jurisdiction use the preset resource so as to limit partial terminals in the cell under the jurisdiction from using the preset resource.
Optionally, the preset position includes: and the terminal uses the nth subframe or the nth micro time slot before the preset resource, wherein n is a positive integer.
Optionally, the value of n is a default value or is sent to the terminal in advance.
Optionally, the sending, to the terminal, resource occupation limitation control information through a downlink control message includes: and sending the resource occupation limitation control information in a public search space through a downlink control message scrambled by a preset public RNTI.
Optionally, the preset resource is a resource used for 4-step random access.
Optionally, the preset resource is at least one of the following resources: used for the resources used when step 2 random access; the resource is not authorized.
Optionally, the resource occupation limitation control information is AB control information.
An embodiment of the present invention further provides a base station, where the base station includes: the detection unit is suitable for detecting whether the resource occupation conflict rate on the preset resource exceeds a preset threshold value or not; and the scheduling unit is suitable for sending resource occupation limitation control information to all terminals in the cell under the jurisdiction through downlink control information at a preset position before all terminals in the cell under the jurisdiction use the preset resources when the resource occupation conflict rate of the preset resources exceeds a preset threshold value so as to limit partial terminals in the cell under the jurisdiction from using the preset resources.
Optionally, the scheduling unit is adapted to send the resource occupancy restriction control information on an nth subframe or an nth minislot before the terminal uses the preset resource, where n is a positive integer.
Optionally, the value of n is a default value or is sent to the terminal in advance.
Optionally, the scheduling unit is adapted to send the resource occupancy restriction control information in a common search space through a downlink control message scrambled by a preset common RNTI.
Optionally, the preset resource is a resource used for 4-step random access.
Optionally, the preset resource is at least one of the following resources: used for the resources used when step 2 random access; the resource is not authorized.
Optionally, the resource occupation limitation control information is AB control information.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
by adopting the scheme, when the resource occupation conflict rate on the preset resource exceeds the preset threshold value, the downlink control message is adopted to send the resource occupation limiting control information to all the terminals in the cell under the jurisdiction to limit part of the terminals in the cell under the jurisdiction from using the preset resource at the preset position before all the terminals in the cell under the jurisdiction use the preset resource, and compared with the method that the downlink control message is adopted to send the resource occupation limiting control information, the time required by updating the downlink control message is shorter, so that the time for the terminals to receive the resource occupation limiting control information can be effectively shortened, and the resource waste is reduced.
Drawings
Fig. 1 is a schematic diagram of signaling interaction in a 4-step random access process;
FIG. 2 is a flowchart of a method for processing resource occupation conflicts in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a base station in an embodiment of the present invention.
Detailed Description
Referring to fig. 1, a terminal accesses a 4G network by a 4-step random access method, and a specific access process may include the following steps:
step 11, the terminal sends a random access lead code to the base station;
step 12, the base station sends a random access response message to the terminal;
step 13, the terminal sends a Radio Resource Control (RRC) connection request to the base station;
step 14, the base station sends an RRC connection response message to the terminal.
Through steps 11 to 14, the terminal accesses to the 4G network where the base station is located.
In 4G, the base station may transmit a plurality of system messages, such as MIB, SIB1, SIB2, etc., to the terminal. When the AB control information changes, all system messages sent by the base station to the terminal enter an upgrade flow. The base station can instruct the terminal to receive the updated system message again from the next change period, so that the updated AB control information needs a long time to be notified to the terminal, and the waste of wireless resources is serious.
In view of the above problems, an embodiment of the present invention provides a method for processing resource occupation conflict, where when a resource occupation conflict rate on a preset resource exceeds a preset threshold, a downlink control message is used to send resource occupation limitation control information to all terminals in a cell under the jurisdiction by using the downlink control message at a preset position before all terminals in the cell under the jurisdiction use the preset resource, so as to limit some terminals in the cell under the jurisdiction from using the preset resource, thereby effectively shortening the time for the terminals to receive the resource occupation limitation control information, and reducing resource waste.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 2, an embodiment of the present invention provides a method for processing resource occupation conflicts, where the method includes the following steps:
In specific implementation, at the same time, a plurality of terminals in a cell under the jurisdiction of a base station may occupy preset resources at the same time, resulting in resource occupation conflicts on the preset resources. When the resource occupation conflict rate on the preset resource exceeds a preset threshold value, the utilization rate of the preset resource is reduced.
In a specific implementation, the base station may detect whether a resource occupation conflict exists on the preset resource according to a condition that data is received on the preset resource. For example, if the base station receives a signal with energy on the preset resource but cannot decode the signal, it may be determined that a resource occupation conflict exists on the preset resource. If the data received by the base station on the preset resource has energy and can be decoded normally, it can be determined that no resource occupation conflict exists on the preset resource.
In a specific implementation, the preset resource may include only one data block, or may include multiple data blocks at the same time. For example, the preset resource may be a resource used for a 4-step random access procedure.
In a specific implementation, the resource occupation conflict rate on the preset resource is a ratio of a resource with conflict on the current preset resource to the preset resource in a statistical sense. Taking the example that the preset resource includes 10 time frequency resource blocks, if a plurality of terminals in a cell governed by the base station occupy 5 of the time frequency resource blocks at the same time, at this time, the resource occupation conflict rate on the preset resource is 50%.
In a specific implementation, the preset threshold may be set according to an actual situation. For example, the setting may be performed according to the service processed on the preset resource, a higher threshold may be set for a service with a low delay requirement (allowing for multiple retransmissions), and a lower threshold may be set for a service with a high delay requirement.
In a specific implementation, when there is a resource occupation conflict on the preset resource, the resource occupation limitation control information may be sent on an nth subframe or an nth micro slot (mini-slot) before the terminal uses the preset resource. For example, the resource occupation limitation control information may be sent on the 2 nd subframe before the preset resource is used, or the resource occupation limitation control information may be sent on the 3 rd micro slot before the preset resource is used, specifically, without limitation. In the embodiment of the present invention, a micro slot refers to a data block transmission unit smaller than a time unit subframe, and can be used for services with lower delay requirements.
In a specific implementation, the value of n may be a default value, or may be sent to the terminal in advance. In other words, the transmission position of the resource occupancy restriction control information may be a default value or may be notified to the terminal in advance. For example, the value of n may be previously sent to the terminal by the base station through a system message.
In an embodiment of the present invention, the terminal may scramble Downlink Control Information (DCI) carrying the resource occupation restriction Control Information by using a preset common Radio Network Temporary Identifier (RNTI), and transmit the scrambled Downlink Control Information in a common search space.
In a specific implementation, the common RNTI may be a RNTI that is sent by the base station to all terminals in the cell under the jurisdiction in advance. And the terminal to be sent the data searches DCI scrambled by the common RNTI in the common search space on the front n subframes or the micro time slot of the preset resources, if so, the terminal takes out the information in the DCI and determines whether the terminal can occupy the preset resources to send the data by using a corresponding algorithm in combination with the self information, such as the grade information of the SIM card and the like.
In specific implementation, the terminal may be limited to use the preset resource by using various algorithms through the resource occupation limitation control information, and the method is not limited specifically as long as the function of alleviating resource occupation conflicts can be achieved.
In another embodiment of the present invention, the resource occupation limitation control information may limit the terminal from using the preset resource by the transmitted data amount. For example, the resource occupation limitation control information may limit the terminal to prohibit the use of the preset resource when the transmitted data amount is larger than the preset data amount, and allow the use of the preset resource when the transmitted data amount is smaller than or equal to the preset data amount.
In a specific implementation, the above scheme may be applied to process resource occupation conflicts generated in 4 steps of random access processes in 4G. At this time, the preset resource may be a resource used for 4-step random access.
In a fifth generation wireless cellular network communication system (5G), in order to reduce signaling interaction between a terminal and a base station and save signaling resources, a 2-step Random Access (2-step Random Access) mode may be adopted to Access a 5G network.
Referring to fig. 1 and 2, in the random access process, the terminal transmits the information transmitted in steps 11 and 13 through one signaling, the base station transmits the information transmitted in steps 12 and 14 through one signaling, and the whole random access process includes two signaling interactions.
Compared with a 4-step random access mode, the 2-step random access mode has shorter time delay when being accessed to the 5G network, but larger resource waste exists when collision occurs. Therefore, in order to reduce the resource waste in the 2-step random access process in 5G, in an embodiment of the present invention, the above scheme may be applied to process resource occupation conflicts generated in the 2-step random access process in 5G, where the preset resource is a resource used for the 2-step random access.
In 5G, in order to reduce signaling interaction between the terminal and the base station and save signaling resources, uplink radio resource allocation may be performed in a grant-free (grant-free) manner. Compared with the uplink wireless resource allocation in the 4G method by adopting the authorization method, the uplink wireless resource allocation in the uplink authorization-free method has shorter time delay and lower signaling overhead, but greater resource waste exists when collision occurs. Therefore, in order to reduce the resource waste in the uplink radio resource allocation process by using the uplink unlicensed mode in 5G, in an embodiment of the present invention, the above scheme may be applied to process a resource occupation conflict generated in the uplink unlicensed process in 5G, where the preset resource is the allocated unlicensed resource.
In specific implementation, the above scheme may be applied to a 2-step random access process in 5G and a process of performing uplink radio resource allocation in an uplink grant-free manner. Of course, the above-mentioned scheme may also be applied to other scenarios requiring processing of resource occupation conflicts, and is not limited to the description in the above-mentioned embodiment, but no matter what scenario is specifically applied, in an embodiment of the present invention, the resource occupation limitation control information may be AB control information, that is, the AB control information is used as the resource occupation limitation control information to limit the terminal to use the preset resource.
As can be seen from the above, in the method for processing resource occupation conflict in the embodiment of the present invention, when a resource conflict exists on a preset resource, the terminal is limited to use the preset resource by sending resource occupation limitation control information to the terminal by using a downlink control message at a preset position before the terminal uses the preset resource, so that time for the terminal to receive the resource occupation limitation control information can be effectively shortened, and resource waste is reduced.
In order to make those skilled in the art better understand and implement the present invention, the following describes in detail a base station corresponding to the above-mentioned resource occupation conflict processing method.
Referring to fig. 3, an embodiment of the present invention provides a base station 30, where the base station 30 may include: a detection unit 31 and a scheduling unit 32. Wherein:
the detecting unit 31 is adapted to detect whether a resource occupation collision rate on a preset resource exceeds a preset threshold;
the scheduling unit 32 is adapted to send resource occupation limitation control information to all terminals in the cell under the jurisdiction through downlink control information at a preset position before all terminals in the cell under the jurisdiction use the preset resource when the resource occupation conflict rate on the preset resource exceeds a preset threshold value, so as to limit part of the terminals in the cell under the jurisdiction from using the preset resource.
In an embodiment of the present invention, the scheduling unit 32 is adapted to send the resource occupancy restriction control information on an nth subframe or an nth minislot before the terminal uses the preset resource, where n is a positive integer.
In a specific implementation, the value of n is a default value or is sent to the terminal in advance.
In an embodiment of the present invention, the scheduling unit 32 is adapted to send the resource occupation limitation control information in a common search space through a downlink control message scrambled by a preset common RNTI.
In a specific implementation, the preset resource is a resource used for 4-step random access.
In a specific implementation, the preset resource is a resource used for the 2-step random access, or is an authorization-free resource, and may also be a resource used for the 2-step random access and an authorization-free resource at the same time.
In a specific implementation, the resource occupation limitation control information is AB control information.
By adopting the base station 30 in the embodiment of the present invention, when there is a resource conflict on the preset resource, the scheduling unit 32 sends the resource occupation limitation control information to the terminal through the downlink control message at the preset position before the terminal uses the preset resource, so as to limit the terminal to use the preset resource, thereby effectively shortening the time for the terminal to receive the resource occupation limitation control information and reducing the resource waste.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A method for processing resource occupation conflict is characterized by comprising the following steps:
the base station detects whether the resource occupation conflict rate on the preset resource exceeds a preset threshold value;
and when the resource occupation conflict rate on the preset resource exceeds a preset threshold value, the base station sends resource occupation limiting control information to all terminals in the cell under the jurisdiction through downlink control information at a preset position before all terminals in the cell under the jurisdiction use the preset resource so as to limit partial terminals in the cell under the jurisdiction from using the preset resource.
2. The method for processing resource occupation conflict according to claim 1, wherein the preset position comprises:
and the terminal uses the nth subframe or the nth micro time slot before the preset resource, wherein n is a positive integer.
3. The method for processing resource occupation conflict according to claim 2, wherein the value of n is a default value or is sent to the terminal in advance.
4. The method for processing resource occupation conflict according to claim 1, wherein the sending resource occupation restriction control information to the terminal through the downlink control message comprises:
and sending the resource occupation limitation control information in a public search space through a downlink control message scrambled by a preset public RNTI.
5. The method for handling resource occupancy conflict of claim 1, wherein the preset resource is a resource used for 4-step random access.
6. The method for processing resource occupation conflict according to claim 1, wherein the preset resource is at least one of the following resources:
used for the resources used when step 2 random access;
the resource is not authorized.
7. The method for processing resource occupation conflict according to any of claims 1 to 6, wherein the resource occupation limitation control information is AB control information.
8. A base station, comprising:
the detection unit is suitable for detecting whether the resource occupation conflict rate on the preset resource exceeds a preset threshold value or not;
and the scheduling unit is suitable for sending resource occupation limiting control information to all terminals in the cell under the jurisdiction through downlink control information at a preset position before all terminals in the cell under the jurisdiction use the preset resource when the resource occupation conflict rate on the preset resource exceeds a preset threshold value so as to limit partial terminals in the cell under the jurisdiction from using the preset resource.
9. The base station of claim 8, wherein the scheduling unit is adapted to transmit the resource occupancy restriction control information on an nth subframe or an nth minislot before the terminal uses the preset resource, wherein n is a positive integer.
10. The base station of claim 9, wherein the value of n is a default value or previously sent to the terminal.
11. The base station of claim 8, wherein the scheduling unit is adapted to transmit the resource occupancy restriction control information in a common search space through a downlink control message scrambled by a preset common RNTI.
12. The base station of claim 8, wherein the preset resource is a resource used for 4-step random access.
13. The base station of claim 8, wherein the predetermined resource is at least one of:
used for the resources used when step 2 random access;
the resource is not authorized.
14. The base station of any of claims 8 to 13, wherein the resource occupancy restriction control information is AB control information.
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| CN111385845A (en) * | 2018-12-29 | 2020-07-07 | 电信科学技术研究院有限公司 | Data sending and receiving method, device, terminal and communication equipment |
| WO2020191599A1 (en) * | 2019-03-25 | 2020-10-01 | 北京欧珀通信有限公司 | Communication method, terminal device, and network device |
| WO2020199022A1 (en) * | 2019-03-29 | 2020-10-08 | 富士通株式会社 | Method and apparatus for selecting type of random access |
| EP4013173A4 (en) * | 2019-08-05 | 2022-07-20 | Beijing Xiaomi Mobile Software Co., Ltd. | Search space configuration method and apparatus, random access method and apparatus, and storage medium |
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| CN102340395A (en) * | 2010-07-22 | 2012-02-01 | 富士通株式会社 | Communication method and node for wireless communication network |
| CN103298027A (en) * | 2012-02-24 | 2013-09-11 | 华为技术有限公司 | Method and device for controlling network congestion and network system |
| CN105101446A (en) * | 2015-06-30 | 2015-11-25 | 宇龙计算机通信科技(深圳)有限公司 | Conflict avoiding method and device for unlicensed bands |
| CN106165458A (en) * | 2014-04-10 | 2016-11-23 | 高通股份有限公司 | Congestion control scheme |
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| US9198198B2 (en) * | 2013-04-16 | 2015-11-24 | Texas Instruments Incorporated | Efficient fairness allocation in powerline CSMA/CA protocols |
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| CN102340395A (en) * | 2010-07-22 | 2012-02-01 | 富士通株式会社 | Communication method and node for wireless communication network |
| CN103298027A (en) * | 2012-02-24 | 2013-09-11 | 华为技术有限公司 | Method and device for controlling network congestion and network system |
| CN106165458A (en) * | 2014-04-10 | 2016-11-23 | 高通股份有限公司 | Congestion control scheme |
| CN105101446A (en) * | 2015-06-30 | 2015-11-25 | 宇龙计算机通信科技(深圳)有限公司 | Conflict avoiding method and device for unlicensed bands |
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