CN102958168A - Cognitive radio system resource redistributing method and system - Google Patents
Cognitive radio system resource redistributing method and system Download PDFInfo
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Abstract
本发明公开了一种认知无线电系统资源的重配方法，所述方法包括：网络侧从网元节点获取接口负荷信息；在资源重配触发时，网络侧根据所述接口负荷信息，进行资源的重配。本发明还公开了一种认知无线电系统资源的重配系统，在资源重配触发时，根据获得的接口负荷信息，进行资源的重配，能够实现无线资源的更合理分配，提高频谱利用率，避免了重配的无线资源不起作用的情况，提高了无线资源重配的成功率。
The invention discloses a resource reconfiguration method of a cognitive radio system. The method includes: the network side obtains interface load information from a network element node; when resource reconfiguration is triggered, the network side performs resource reconfiguration according to the interface load information reconfiguration. The present invention also discloses a resource reconfiguration system of a cognitive radio system. When resource reconfiguration is triggered, resource reconfiguration is performed according to the obtained interface load information, which can realize more reasonable allocation of wireless resources and improve spectrum utilization , avoiding the situation that reconfigured radio resources do not work, and improving the success rate of radio resource reconfiguration.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a method and a system for reconfiguring resources of a cognitive radio system.
Background
With the continuous progress of radio technology, a wide variety of radio services are emerging in large numbers. However, the spectrum resources supported by the radio services are limited, and the spectrum resources show a very tight situation in the face of the increasing demand of people for bandwidth; on the other hand, under the conventional fixed spectrum allocation mode, the utilization rate of the spectrum resources is not high.
With the diversification of system requirements, the coexistence of multiple Radio Access Technologies (RATs) is the current situation, and the traffic distribution between different RATs is different and even very different for different operators in different geographical areas. From the present situation and the trend of network operation, operators want to be able to uniformly manage different systems coexisting in short term or geographical location to adapt to the optimization of network traffic characteristics and resource utilization. Typically, in a region or at a time when a network is installed, an operator wants to add a new Generation network, such as a Long Term Evolution (LTE) network added to a deployed Second/Third Generation (2G/3G) network, and the operator wants to dynamically manage hardware resources and radio resources of an existing system and a next Generation system according to a change of cell traffic residing in a specific area, so that a new technology is needed to be utilized: cognitive Radio (CR) technology.
In consideration of the cell setting of a specific area, traffic of different services in a specific system or different systems may vary in one area according to a day period. In addition, some cells may be congested in some specific areas, have a high call blocking probability, are surrounded by a plurality of cells with lower loads, and present a low blocking probability. In addition, where two or more RATs are deployed in the same area, each RAT may have different distributions of its different service traffic over time relative to the other RATs. For example, in a certain area, a Global System for Mobile communication (GSM) System and an LTE System are simultaneously deployed, and in a period of time, there are few GSM users, small traffic, and a low load on the GSM System, while users in the LTE System are concentrated, the traffic is large, resources are short, and the load on the network side of the LTE System is too heavy; in this scenario, idle resources in the GSM system are wasted, while resources are too tight for the LTE system. In a cellular network, a reconfiguration module for controlling and reconfiguring resources is mainly used to monitor resource utilization at a base station side and make a resource reconfiguration decision, and in a tvws (tv White space) band system, a Central Control node (CCP) for managing resource reconfiguration has a function similar to that of the reconfiguration module.
If the idle frequency resources of the GSM system are allocated to the LTE system, the load of the cell in the LTE system can be relieved, the cell capacity is increased, and the system operation condition of the GSM is not affected, but when resource borrowing allocation is performed between systems or in a system, for example, when the load of the LTE system is too high, although idle resources of another cell or system are borrowed, the reconfiguration module does not consider that the signaling load of the core network is too high, for example, the signaling load of a Mobile Management Entity (MME) is high, or the load of other interfaces is too high, when the base station obtains new frequency resources, but the interface load is too high, the terminal cannot be normally allocated with services, the reconfiguration of the resources does not play a due role at this time, and there is a certain waste.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and a system for reconfiguring resources of a cognitive radio system, which can achieve reasonable allocation of radio resources.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of cognitive radio system resource reallocation, the method comprising:
the network side acquires interface load information from the network element node;
and when the resource reconfiguration is triggered, the network side performs resource reconfiguration according to the interface load information.
Wherein, the network side is a reconfiguration module or a central control node;
the network element node is a base station or a core network node.
The network side obtains the interface load information from the network element node as follows:
a network side sends interface load request information to a base station managed by the network side according to a preset period or sends the interface load request information to the base station when monitoring that the resource utilization rate of the base station exceeds a preset threshold value;
after receiving the interface load request information, the base station reports the interface load information to a network side; or,
the base station sends a resource allocation request message to a network side, wherein the resource allocation request message carries the interface load information;
the interface load information includes one or more of Transport Network Layer (TNL) load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, an Abis interface, and core network signaling load information.
The core network signaling load information comprises one or more of signaling load state information of a Mobile Management Entity (MME), service processing state information of a Serving Gateway (SGW), signaling load state information of a Serving GPRS Support Node (SGSN) and signaling load state information of a Mobile Switching Center (MSC);
correspondingly, the acquiring, by the network side, the interface load information from the network element node further includes: the network side receives one or more of MME signaling load state information, SGW service processing state information, SGSN signaling load state information and MSC signaling load state information which are periodically reported by MME, SGW, SGSN and MSC.
Wherein the resource reconfiguration trigger is:
a network side monitors that the resource utilization rate of a base station in a self service area exceeds a preset threshold value; or,
the network side receives the resource allocation request message sent by the base station.
Further, before the network side performs resource reallocation according to the interface load information, the method further includes:
the network side judges whether the interface load information is received or not, and when the interface load information is not received, the network side sends the interface load request information.
The network side reconfigures resources according to the interface load information as follows:
when the interface load is higher than a preset threshold, the network side does not allocate a new idle spectrum to the base station; or, the network side does not allocate a new idle spectrum to the base station, and configures the network element node to report the interface load information periodically or triggered by an event;
and when the interface load is not higher than a preset threshold and the resource utilization rate of the base station exceeds a preset threshold, the network side allocates available idle spectrum resources for the base station.
A system for reconfiguring resources of a cognitive radio system comprises a network element node, and the system also comprises a network side, wherein the network side is used for acquiring interface load information from the network element node and reconfiguring resources according to the interface load information when resource reconfiguration is triggered.
Wherein, the network side is further provided with a reconfiguration module and a central control node; the network element node is further a base station or a core network node.
The network side is specifically configured to send interface load request information to a base station managed by the network side according to a preset period or send the interface load request information to the base station when detecting that a resource utilization rate of the base station exceeds a preset threshold;
the base station is used for reporting the interface load information to the network side after receiving the interface load request information; or,
the base station is configured to send a resource allocation request message to the network side, where the resource allocation request message carries the interface load information; the interface load information includes one or more of TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, an Abis interface, and core network signaling load information.
When the base station is specifically configured to report one or more TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, and an Abis interface to the network side, the network side is further configured to receive one or more of MME signaling load state information, service processing state information of an SGW, signaling load state information of an SGSN, and signaling load state information of an MSC, which are periodically reported by the MME, the SGW, the SGSN, and the MSC.
The network side is specifically configured to trigger resource reallocation when monitoring that the resource utilization rate of the base station managed by the network side exceeds a preset threshold or receiving a resource allocation request message sent by the base station.
The network side is further configured to determine whether interface load information is received, and send the interface load request information when the interface load information is not received.
The network side is specifically configured to temporarily not allocate a new idle spectrum to the base station when the interface load is higher than a preset threshold; or, the network side does not allocate a new idle spectrum to the base station, and configures the network element node to report interface load information periodically or triggered by an event; and when the interface load is not higher than a preset threshold and the resource utilization rate of the base station exceeds a preset threshold, allocating available idle spectrum resources for the base station.
When the resource reconfiguration is triggered, the invention reconfigures the resources according to the obtained interface load information, can realize more reasonable allocation of the wireless resources, improves the utilization rate of frequency spectrum, avoids the condition that the reconfigured wireless resources do not work, and improves the success rate of the wireless resource reconfiguration.
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FIG. 1 is a flowchart illustrating a method for reconfiguring resources of a cognitive radio system according to the present invention;
fig. 2 is a flowchart illustrating a method for reconfiguring resources of a cognitive radio system according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention;
FIG. 4 is a flowchart illustrating a third embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention;
fig. 5 is a flowchart illustrating a fourth embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention;
fig. 6 is a flowchart illustrating a fifth embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention;
fig. 7 is a flowchart illustrating a sixth embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention;
fig. 8 is a flowchart illustrating a seventh embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention;
fig. 9 is a schematic structural diagram of a cognitive radio system resource reallocation system according to the present invention.
Detailed Description
The basic idea of the invention is as follows: the network side acquires interface load information from the network element node; and when the resource reconfiguration is triggered, the network side performs resource reconfiguration according to the interface load information.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.
Fig. 1 shows a flow of a method for reconfiguring resources of a cognitive radio system according to the present invention, and as shown in fig. 1, the method includes the following steps:
step 101, a network side acquires interface load information from a network element node;
specifically, the network side is a reconfiguration module or a central control node; the network element node is a base station or a core network node. Wherein the base station can be an eNB of an LTE system; a NodeB and a Radio Network Controller (RNC) of a Universal Mobile Telecommunications System (UMTS); a Base Station Controller (BSC) of GSM, a Base Transceiver Station (BTS); the core network Node may be MME, Serving Gateway (SGW), GPRS Support Node (SGSN), Gateway GPRS Support Node (GGSN) of the UMTS system, Mobile Switching Center (MSC) of the GSM system, or Media Gateway (MGW).
Here, the interface load information includes one or more of Transport Network Layer (TNL) load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, and an Abis interface, and core Network signaling load information; the core network signaling load information includes one or more of MME signaling load state information, service processing status information of SGW, signaling load state information of SGSN, signaling load state information of MSC, and the like.
The TNL load information of the uplink S1 interface, the downlink S1 interface, the Iu interface, the Iub interface, the Gb interface, the a interface, and the Abis interface may be identified as follows: low Load (Low Load), Medium Load (Medium Load), High Load (High Load), OverLoad (OverLoad), and the like. The core network signaling load information may be represented by a request reduction signaling indication message of the core network, for example, the request reduction signaling indication message sent by the MME is used to represent a signaling proportion that the MME requests the base station to reduce, and when the request reduction signaling indication message is 90%, the signaling proportion that the MME requests the base station to reduce is represented as 90%, which indicates that the current core network is in a high load state; when the signaling reduction request indication message is 10%, indicating that the signaling reduction proportion of the MME request base station is 10%, indicating that the current core network is in a low load state; when the base station does not receive the request reduction signaling indication message sent by the MME, the core network is in a normal state, and the load reduction requirement is not met.
Specifically, the method for the network side to obtain the interface load information from the network element node includes: a network side sends interface load request information to a base station in a self service area according to a preset period or sends the interface load request information to the base station when monitoring that the resource utilization rate of the base station exceeds a preset threshold value; for example, when the reconfiguration module monitors that the resource utilization rate of a certain base station in the self service area exceeds 90%, that is, the base station has allocated 90% of resources, has 10% of available idle resources, or has less than 10% of available idle resources, it sends interface load request information to the base station; after receiving the interface load request information, the base station reports the interface load information to the network side; or,
the base station directly sends a resource allocation request message to a network side, wherein the resource allocation request message carries information such as the interface load information and the wireless resource utilization condition in the base station;
here, when the base station does not receive the signaling indication message requesting reduction sent by the core network node, the base station may not include the core network signaling load status information in the interface load information sent to the network side or set the core network signaling load status information to null
In addition, the network side can also directly receive one or more of TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface and an Abis interface, and directly receive one or more of MME signaling load state information periodically reported by an MME, an SGW, an SGSN and an MSC, service processing state information of the SGW, signaling load state information of the SGSN and signaling load state information of the MSC.
102, when the resource reconfiguration is triggered, the network side reconfigures the resource according to the interface load information;
specifically, in this step, the resource reconfiguration trigger is specifically that the network side monitors that the resource utilization rate of the base station in its service area exceeds a preset threshold; or receiving a resource allocation request message sent by the base station.
When the network side triggers resource reconfiguration, whether interface load information is received or not can be further judged, and when the interface load information is not received, interface load request information is sent; here, when the network side can directly obtain one or more TNL load information and core network signaling load information from the base station, where the TNL load information includes an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, and an Abis interface, the network side sends the interface load request information to the base station; when the network side acquires one or more of TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an A interface and an Abis interface from a base station and acquires core network signaling load information from a core network, interface load request information is respectively sent to the base station and related entities of the core network signaling load information, such as MME, SGW and the like.
When the network side performs resource reallocation according to the interface load information, when the interface load is higher than a preset threshold, the interface load is higher at the moment, and even if new spectrum resources are allocated to the base station, the terminal cannot be normally served, so that the network side does not allocate new idle spectrum to the base station at the moment; or, the network side does not allocate a new idle spectrum to the base station, and configures the network element node to report the interface load information periodically or triggered by an event; specifically, when the network side monitors that the resource utilization rate of the base station exceeds a preset threshold and the interface load is not higher than the preset threshold, allocating an available idle resource spectrum to the base station. It should be understood that, when the network side may further obtain the core network signaling load information from the core network related entity, the core network related entity may also be configured to report the core network signaling load information periodically or by event triggering, where the event triggering may refer to a situation that the core network is in a high load state, or the like.
Fig. 2 shows a flow of a first embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention, and as shown in fig. 2, in this embodiment, specifically, when the cognitive radio system is an LTE system, a description of a network side for a reconfiguration module includes the following steps:
here, the resource reconfiguration trigger is specifically that a reconfiguration module monitors that the resource utilization rate of a base station in a self service area exceeds a preset threshold; or the reconfiguration module receives a resource allocation request message sent by the base station.
the interface load information comprises uplink and/or downlink S1 interface TNL load information and/or core network signaling load information; the core network signaling load information comprises MME signaling load state information, SGW service processing state information and the like;
here, the uplink and/or downlink S1 interface TNL load information may be identified as follows: low load, medium load, high load, overload, etc. The core network signaling load information may be represented by a request reduction signaling indication message of the core network, for example, the reduction signaling indication message sent by the MME is used to represent a signaling proportion reduced by the MME requesting the base station, and when the request reduction signaling indication message is 90%, the signaling proportion reduced by the MME requesting the base station is represented as 90%, which indicates that the current core network is in a high load state; when the signaling reduction request indication message is 10%, indicating that the signaling reduction proportion of the MME request base station is 10%, indicating that the current core network is in a low load state; when the base station does not receive the request reduction signaling indication message sent by the MME, the core network is in a normal state without the requirement of reducing the load,
specifically, the manner of acquiring interface load information by the reconfiguration module includes: the reconfiguration module sends interface load request information to a base station in a self service area according to a preset period or sends the interface load request information to the base station when monitoring that the resource utilization rate of the base station exceeds a preset threshold value; for example, when the reconfiguration module monitors that the resource utilization rate of a certain base station in the self service area exceeds 90%, that is, the base station has allocated 90% of resources, has 10% of available idle resources, or has less than 10% of available idle resources, it sends interface load request information to the base station; after receiving the interface load request information, the base station reports the interface load information to the reconfiguration module; or,
the base station directly sends a resource allocation request message to the reconfiguration module, wherein the resource allocation request message carries information such as the interface load information and the wireless resource utilization condition in the base station;
here, when the base station does not receive the request reduction signaling indication message sent by the MME, the base station may not include MME signaling load status information in the interface load information sent to the reconfiguration module or set the MME signaling load status information to null.
In addition, the reconfiguration module may also directly receive uplink and/or downlink TNL load information of an S1 interface from the base station, and directly receive MME signaling load state information and/or service processing status information of the SGW periodically reported by the MME and/or the SGW.
here, the reconfiguration module determines whether it is suitable to allocate a new idle spectrum to the base station according to the resource utilization condition of the base station and the interface load condition; specifically, when the reconfiguration module monitors that the resource utilization rate of the base station exceeds a preset threshold and the interface load information is not higher than a preset threshold, step 206 is executed; otherwise, step 205 is performed.
here, the reconfiguration module continues to monitor the interface load condition, and configures the base station to report the interface load information periodically or triggered by an event for the reconfiguration module; it should be understood that, when the reconfiguration module may further obtain the core network signaling load information from the core network related entity, the reconfiguration module may also configure the core network related entity to report the core network signaling load information periodically or by event triggering, where the event triggering may refer to a situation that the core network is in a high load state, or the like.
The step also comprises that the reconfiguration module continuously monitors the resource utilization rate of the base station; when the reconfiguration module monitors that the resource utilization rate of the base station exceeds the preset threshold and the interface load information is not higher than the preset threshold, it is determined that the reconfiguration condition is satisfied, and step 206 is executed.
specifically, the reconfiguration module allocates an available idle resource spectrum to the base station.
Fig. 3 shows a flow of a first embodiment of a method for reconfiguring resources of a cognitive radio system according to the present invention, as shown in fig. 3, in this embodiment, a network side is specifically a central control node, and is located at a network management side or a core network side, and monitors resource utilization and interface load information of a base station in a self service area; the method comprises the following steps:
step 301-;
step 303, the central control node sends interface load request information to the base station, and after receiving the interface load request information, the base station responds to and reports uplink and/or downlink TNL load information of the S1 interface and signaling load information of the core network to the central control node through the interface load information;
the TNL load information is identified by one of: low load, medium load, high load, overload, etc. The information status of the core network is represented by the signaling proportion of the request reduction of the core network, for example, the signaling proportion of the request reduction of the base station by the MME is 90%, which indicates that the core network is now in a high load state. If the request is reduced by 10%, it indicates that the core network is in a lower load state, etc.
If the base station does not receive the signaling reduction indication message (such as OverLoad Start) of the MME, the base station may not carry the core network signaling load in the interface load information or set to null when reporting to the central control node. The core network is in a normal state and the load requirement is not reduced.
Step 304-; or, the central control node does not allocate a new idle spectrum to the base station, and configures the base station to report the interface load information periodically or by event triggering; when the central control node learns that the interface load of the base station is low and the resource utilization is still high, step 306 is executed to configure a new idle spectrum resource, such as a TV band resource, to the base station.
Here, the interface Load may be a Low Load on the uplink and/or downlink S1 interface TNL, or when the interface Load information is lower than a preset threshold, the central control node may configure a new idle spectrum resource to the base station.
Step 307, after obtaining the new available spectrum resource, the base station performs reconfiguration, and issues context information about the new carrier frequency to the terminal.
Fig. 4 shows a flow of a third embodiment of the resource reallocation method of the cognitive radio system according to the present invention, as shown in fig. 4, in this embodiment, a reallocation module is located at a network management side or a core network side, and a base station reports interface load information to the reallocation module by sending a resource allocation request message; the method comprises the following steps:
step 401, the base station establishes a request for allocating channel resources for a connection of a terminal user, and when the resources requested by the user are too many and reach a preset threshold, for example, when the resources requested by the user reach 95% of the allocable resources of the base station, the base station sends a resource allocation request message to the reallocation module.
The resource allocation request message includes information of resource utilization of the base station, such as the resource utilization of the base station is 95%, and interface load information.
The threshold may be set by the base station itself or configured by the reconfiguration module.
If the base station does not receive the signaling reduction request indication message of the MME, the base station can not carry the signaling load information of the core network or set to be empty when reporting to the reconfiguration module. At this time, it is indicated that the core network is in a normal state, and the load demand is not reduced.
Step 402, after receiving the resource allocation request message of the base station, the reconfiguration module analyzes the resource utilization condition of the base station and the core network load condition corresponding to the base station. If the resource utilization of the base station really reaches the limit, such as High Load or Over Load, and the Load of the core network is low or the requirement of the base station for reporting the signaling Load is not reduced, the reconfiguration module acquires the available frequency spectrum resources.
Here, if there is no suitable spectrum resource in the system, the reconfiguration module may negotiate available spectrum resources with the reconfiguration modules of other systems, and in this embodiment, the reconfiguration module for the LTE system negotiates available spectrum resources with the reconfiguration module for the UMTS system. After acquiring available spectrum resources, the reconfiguration module issues a resource allocation request response message to the base station, where the resource allocation request response message includes available spectrum information, such as carrier frequency, bandwidth, power, and radio resource information.
Step 403, after obtaining the new available spectrum resource, the base station performs reconfiguration, and issues context information about the new carrier frequency to the terminal.
Further, when the resources of the UMTS or GSM system are reconfigured, the process is the same as described above, except that the interface load information is one or more of TNL load information of the Iu interface, the Iub interface, the Gb interface, the a interface, and the Abis interface, and core network signaling load information, and the core network node is an SGSN or an MSC.
Fig. 5 shows a flow of a fourth embodiment of the method for reconfiguring resources of a cognitive radio system according to the present invention, as shown in fig. 5, in this embodiment, a reconfiguration module is located at a network management side or a core network side, and a base station itself determines whether resource reconfiguration is needed according to interface load information; the method comprises the following steps:
step 501, the base station allocates resources for the connection establishment request of the terminal user, when the user request increases, the resources available to the base station decrease, and when the resource utilization of the base station exceeds a threshold, the base station learns that the hardware load is too high or the TNL load of the S1 interface is too high, or the MME sends a request reduction signaling indication message to the base station, such as Overload Start, and the base station does not temporarily perform the resource allocation request.
When the resource utilization of the base station is tight, the hardware Load is not high, such as Low Load or Medium Load, the TNL Load of the S1 interface is not high, and the MME does not send an OverLoad Start command to the base station, the base station sends a resource allocation request to the reconfiguration module.
The resource allocation request message includes: radio resource utilization information of the base station, and interface load information.
The TNL load information is used for one of the following: low Load, Medium Load, High Load, Overload. The information status of the core network is represented by the signaling proportion of the request reduction of the core network, for example, the signaling proportion of the request reduction of the base station by the MME is 90%, which indicates that the core network is now in a high load state. If the request is reduced by 10%, it indicates that the core network is in a lower load state, etc.
Step 502, the reconfiguration module receives the resource allocation request of the base station, acquires the idle spectrum resource, and allocates the available resource for the base station according to the load information of the interface.
Step 503, after obtaining the new available spectrum resource, the base station performs reconfiguration, and issues context information about the new carrier frequency to the terminal.
Fig. 6 shows a flow of a fifth embodiment of the method for reconfiguring resources of a cognitive radio system according to the present invention, and as shown in fig. 6, in this embodiment, a reconfiguration module is located in a base station; the method comprises the following steps:
When the resource utilization of the base station is tight, the hardware Load is not high, such as Low Load or MediumLoad), and the TNL Load of the S1 interface is not high, and the MME does not send an OverLoad Start command to the base station, the reallocation module may coordinate the resource to perform resource reallocation.
Fig. 7 shows a flow of a sixth embodiment of the method for reconfiguring resources of a cognitive radio system according to the present invention, and as shown in fig. 7, in this embodiment, a base station side actively requests a capacity status of a core network side, including the following steps:
step 701 and 702 are included, in which the resource utilization at the base station side exceeds the threshold, and if the allocated resources account for 90% of the total resources, the base station actively requests the MME to acquire the load condition information at the core network side.
Step 703, after the MME receives the load status request from the base station, the MME sends the current capacity status, such as: s1 signaling connection capacity that may also be accepted, and/or signaling load level on the MME side, such as: and sending information such as Low Load, Medium Load, High Load, Over Load and the like to the base station.
Step 704-: signaling connections of 100 UEs may also be accepted; or when the Load is High, such as High Load or Over Load, the base station does not send a resource allocation request to the reallocation module, and can balance the UE Load to the neighboring cells.
If the acceptable S1 signaling connection capacity at the MME side is large, such as: the signaling connection of 1000 UEs can be accepted; or the Load is Low, such as Low Load or Medium Load, the base station sends a resource allocation request to the reconfiguration module.
Step 706-; and the base station receives and reallocates the available idle spectrum resources allocated by the reallocation module and informs the terminal user.
Further, the request procedure for the core network nodes being SGSN and MSC is as described above, and the interface load information is one or more of load information of Iub interface, Gb interface, a interface, Abis interface and core network signaling load information.
Fig. 8 shows a flow of a seventh embodiment of the method for reconfiguring resources of a cognitive radio system according to the present invention, and as shown in fig. 8, in this embodiment, the method for notifying the capacity status of the base station by the core network side includes the following steps:
step 801-: signaling connections for 100 UEs; or the signaling load exceeds a certain level, such as: and when the Load is High, the MME informs the base station of the signaling Load condition of the current MME side.
Further, the MME may also periodically notify the base station of the signaling load status information on the MME side.
Step 803-: signaling connections of 100 UEs may also be accepted; or the Load is high, such as when HighLoad or Over Load, the base station does not send a resource allocation request to the reallocation module, and the UE Load can be balanced to the neighboring cells;
if the acceptable S1 signaling connection capacity at the MME side is large, such as: the signaling connection of 1000 UEs can be accepted; or the Load is Low, for example, when the Load is Low Load or Medium Load, the base station sends a resource allocation request to the reconfiguration module;
step 805-; .
And the base station acquires the new available idle spectrum resources and performs reconfiguration to inform the terminal user.
Fig. 9 shows the structure of the reconfiguration system of the cognitive radio system resource of the present invention, as shown in fig. 9, the reconfiguration system includes a network side 91 and a network element node 92; the network side 91 is configured to obtain the interface load information of the slave network element node 92, and perform resource reallocation according to the interface load information when resource reallocation is triggered.
Here, the interface load information includes one or more of TNL load information and core network signaling load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface and an Abis interface; the core network signaling load information includes one or more of MME signaling load state information, service processing status information of SGW, signaling load state information of SGSN, signaling load state information of MSC, and the like.
Further, the network side 91 is further a reconfiguration module and a central control node; the network element node 92 is further a base station or a core network node.
The network side 91 is specifically configured to send interface load request information to a base station in a self service area according to a preset period, or send interface load request information to the base station when detecting that a resource utilization rate of the base station in the self service area exceeds a preset threshold;
the base station is configured to report the interface load information to the network side 91 after receiving the interface load request information; or,
the base station is configured to send a resource allocation request message to the network side 91, where the resource allocation request message carries the interface load information; the interface load information includes one or more of TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, an Abis interface, and core network signaling load information.
Here, the TNL load information of the uplink S1 interface, the downlink S1 interface, the Iu interface, the Iub interface, the Gb interface, the a interface, and the Abis interface may be identified as follows: low load, medium load, high load, overload, etc. The core network signaling load information may be represented by a request reduction signaling indication message of the core network, for example, the request reduction signaling indication message sent by the MME is used to represent a signaling proportion that the MME requests the base station to reduce, and when the request reduction signaling indication message is 90%, the signaling proportion that the MME requests the base station to reduce is represented as 90%, which indicates that the current core network is in a high load state; when the signaling reduction request indication message is 10%, indicating that the signaling reduction proportion of the MME request base station is 10%, indicating that the current core network is in a low load state; when the base station does not receive the request reduction signaling indication message sent by the MME, the core network is in a normal state, and the load reduction requirement is not met.
When the base station is specifically configured to report one or more TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, and an Abis interface to the network side 91, the network side 91 is further configured to receive one or more of MME signaling load state information, service processing state information of an SGW, signaling load state information of an SGSN, and signaling load state information of an MSC, which are periodically reported by the MME, the SGW, the SGSN, and the MSC.
Further, the network side 91 is specifically configured to trigger resource reallocation when monitoring that the resource utilization rate of the base station managed by the network side exceeds a preset threshold, or when receiving a resource allocation request message sent by the base station.
Further, the network side 91 is further configured to determine whether interface load information is received, and when the interface load information is not received, send interface load request information; here, when the network side 91 can directly obtain one or more TNL load information and core network signaling load information including an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, and an Abis interface from a base station, the network side sends the interface load request information to the base station; when the network side 91 acquires one or more TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, and an Abis interface from the base station, and acquires core network signaling load information from the core network, it sends interface load request information to the base station and related entities of the core network signaling load information, such as MME, SGW, and the like, respectively.
The network side 91 is specifically configured to, when the interface load is higher than a preset threshold, temporarily not allocate a new idle spectrum to the base station; or, the network side does not allocate a new idle spectrum to the base station, and configures the base station to report the interface load information periodically or by event triggering, it should be understood that, when the network side 91 can also obtain the core network signaling load information from the core network related entity, the network side also configures the core network related entity to report the core network signaling load information periodically or by event triggering, where the event triggering may refer to a situation that the core network is in a high load state;
and when the interface load is not higher than a preset threshold and the resource utilization rate of the base station exceeds a preset threshold, allocating available idle spectrum resources for the base station.
It should be understood that the reconfiguration module or the central control node of the reconfiguration system may also be embedded in the base station, and at this time, the specific functions of the reconfiguration system are substantially the same as those described above and are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (14)
1. A method for reconfiguring resources of a cognitive radio system, wherein the method comprises:
the network side acquires interface load information from the network element node;
and when the resource reconfiguration is triggered, the network side performs resource reconfiguration according to the interface load information.
2. The method of claim 1, wherein the network side is a reconfiguration module or a central control node;
the network element node is a base station or a core network node.
3. The method of claim 2, wherein the obtaining, by the network side, the interface load information from the network element node is:
a network side sends interface load request information to a base station managed by the network side according to a preset period or sends the interface load request information to the base station when monitoring that the resource utilization rate of the base station exceeds a preset threshold value;
after receiving the interface load request information, the base station reports the interface load information to a network side; or,
the base station sends a resource allocation request message to a network side, wherein the resource allocation request message carries the interface load information;
the interface load information includes one or more of transport network layer TNL load information and core network signaling load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface and an Abis interface.
4. The method of claim 3, wherein the core network signaling load information comprises one or more of Mobility Management Entity (MME) signaling load status information, traffic handling status information of Serving Gateway (SGW), signaling load status information of Serving GPRS Support Node (SGSN), and signaling load status information of Mobile Switching Center (MSC);
correspondingly, the acquiring, by the network side, the interface load information from the network element node further includes: the network side receives one or more of MME signaling load state information, SGW service processing state information, SGSN signaling load state information and MSC signaling load state information which are periodically reported by MME, SGW, SGSN and MSC.
5. The method of claim 2, wherein the resource reconfiguration trigger is:
a network side monitors that the resource utilization rate of a base station in a self service area exceeds a preset threshold value; or,
the network side receives the resource allocation request message sent by the base station.
6. The method according to claim 2, wherein before the network side performs resource reallocation according to the interface load information, the method further comprises:
the network side judges whether the interface load information is received or not, and when the interface load information is not received, the network side sends the interface load request information.
7. The method according to any one of claims 1 to 6, wherein the network side performs resource reconfiguration according to the interface load information by:
when the interface load is higher than a preset threshold, the network side does not allocate a new idle spectrum to the base station; or, the network side does not allocate a new idle spectrum to the base station, and configures the network element node to report the interface load information periodically or triggered by an event;
and when the interface load is not higher than a preset threshold and the resource utilization rate of the base station exceeds a preset threshold, the network side allocates available idle spectrum resources for the base station.
8. A system for reconfiguring resources of a cognitive radio system comprises a network element node and is characterized in that the system also comprises a network side, wherein the network side is used for acquiring interface load information from the network element node and reconfiguring resources according to the interface load information when resource reconfiguration is triggered.
9. The system of claim 8, wherein the network side is further a reconfiguration module and a central control node; the network element node is further a base station or a core network node.
10. The system according to claim 9, wherein the network side is specifically configured to send interface load request information to a base station managed by the network side according to a preset period or send interface load request information to the base station when it is detected that a resource utilization rate of the base station exceeds a preset threshold;
the base station is used for reporting the interface load information to the network side after receiving the interface load request information; or,
the base station is configured to send a resource allocation request message to the network side, where the resource allocation request message carries the interface load information; the interface load information includes one or more of TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, an Abis interface, and core network signaling load information.
11. The system according to claim 10, wherein when the base station is specifically configured to report one or more of TNL load information of an uplink S1 interface, a downlink S1 interface, an Iu interface, an Iub interface, a Gb interface, an a interface, and an Abis interface to the network side, the network side is further configured to receive one or more of MME signaling load state information, service processing state information of an SGW, signaling load state information of an SGSN, and signaling load state information of an MSC, which are periodically reported by an MME, an SGW, an SGSN, and an MSC.
12. The system according to claim 9, wherein the network side is specifically configured to trigger resource reallocation when it is monitored that a resource utilization rate of a base station managed by the network side exceeds a preset threshold, or when a resource allocation request message sent by the base station is received.
13. The system according to claim 9, wherein the network side is further configured to determine whether interface load information is received, and when the interface load information is not received, send interface load request information.
14. The system according to any one of claims 8 to 13, wherein the network side is specifically configured to temporarily not allocate a new idle spectrum to the base station when the interface load is higher than a preset threshold; or, the network side does not allocate a new idle spectrum to the base station, and configures the network element node to report interface load information periodically or triggered by an event; and when the interface load is not higher than a preset threshold and the resource utilization rate of the base station exceeds a preset threshold, allocating available idle spectrum resources for the base station.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110252312.8A CN102958168A (en) | 2011-08-30 | 2011-08-30 | Cognitive radio system resource redistributing method and system |
| PCT/CN2012/078389 WO2013029426A1 (en) | 2011-08-30 | 2012-07-09 | Method, device and system for resource reallocation in cognitive radio system |
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| CN201110252312.8A CN102958168A (en) | 2011-08-30 | 2011-08-30 | Cognitive radio system resource redistributing method and system |
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| WO (1) | WO2013029426A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190504A1 (en) * | 2013-05-29 | 2014-12-04 | 华为技术有限公司 | Wireless frequency spectrum resource allocation method and device |
| WO2015120604A1 (en) * | 2014-02-13 | 2015-08-20 | 华为技术有限公司 | Data transmission method and device |
| CN109992396A (en) * | 2017-12-29 | 2019-07-09 | 杭州海康威视数字技术股份有限公司 | Load control method, device, electronic equipment and distributed file system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE602005008949D1 (en) * | 2005-08-04 | 2008-09-25 | St Microelectronics Srl | Method and system for dynamic spectrum allocation, and corresponding computer program product |
| CN100556189C (en) * | 2006-03-30 | 2009-10-28 | 华为技术有限公司 | Method and system for realizing wireless resource management and wireless support server thereof |
| CN101483917A (en) * | 2008-01-10 | 2009-07-15 | 华为技术有限公司 | Frequency band access switching method, terminal and base station |
| CN101448321B (en) * | 2008-10-28 | 2010-09-08 | 北京邮电大学 | Method and device for sharing spectrum resources in heterogeneous wireless networks |
| CN101541041A (en) * | 2009-04-23 | 2009-09-23 | 华为技术有限公司 | Method for sharing load, device and system thereof |
| CN101959241A (en) * | 2009-07-14 | 2011-01-26 | 中兴通讯股份有限公司 | Cross-system load balancing method and system |
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- 2011-08-30 CN CN201110252312.8A patent/CN102958168A/en active Pending
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190504A1 (en) * | 2013-05-29 | 2014-12-04 | 华为技术有限公司 | Wireless frequency spectrum resource allocation method and device |
| CN105210437A (en) * | 2013-05-29 | 2015-12-30 | 华为技术有限公司 | Wireless frequency spectrum resource allocation method and device |
| CN105210437B (en) * | 2013-05-29 | 2019-05-10 | 华为技术有限公司 | A method and device for allocating wireless spectrum resources |
| WO2015120604A1 (en) * | 2014-02-13 | 2015-08-20 | 华为技术有限公司 | Data transmission method and device |
| CN105474723A (en) * | 2014-02-13 | 2016-04-06 | 华为技术有限公司 | Data transmission method and device |
| US9787390B2 (en) | 2014-02-13 | 2017-10-10 | Huawei Technologies Co., Ltd. | Data transmission method and device |
| CN109992396A (en) * | 2017-12-29 | 2019-07-09 | 杭州海康威视数字技术股份有限公司 | Load control method, device, electronic equipment and distributed file system |
| CN109992396B (en) * | 2017-12-29 | 2021-03-19 | 杭州海康威视数字技术股份有限公司 | Load control method, device, electronic device and distributed file system |
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| WO2013029426A1 (en) | 2013-03-07 |
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