KR100887507B1 - Method and apparatus of updating network information for managing crrm in multi-radio network - Google Patents

Abstract

An update method and apparatus for CRRM operation in multiple wireless networks are disclosed. The invention comprises the steps of: a) at least two different networks transmitting respective network related information to a common radio resource manager (CRRM) that manages the networks at a fixed update time; b) generating a reference value based on the network related information in the CRRM; And c) redistributing the traffic of the network based on the reference value in the CRRM; redistributing the traffic of the network based on the reference value in the CRRM.

Multi-Network, CRRM, Radio Resources, Network Selection, Update

Description

TECHNICAL AND APPARATUS OF UPDATING NETWORK INFORMATION FOR MANAGING CRRM IN MULTI-RADIO NETWORK}

1 illustrates an example of a multiple wireless network including a CRRM according to an embodiment of the present invention.

FIG. 2 is a schematic internal block diagram of the CRRM of FIG. 1.

3 is a flowchart illustrating an update method of predetermined networks for CRRM operation according to an embodiment of the present invention.

The present invention relates to a mobile communication system, and more particularly to multi-radio networks including wireless access networks such as CDMA 1x, CDMA 1x EV-DO, WCDMA, HSDPA, 802.16e. The present invention relates to an update method and apparatus for CRRM operation in a multiple wireless network in which a mobile terminal determines which network to enter under CRRM operation.

In various wireless network environments, existing networks such as CDMA 1x, WCDMA, and GSM provide services independently, and heterogeneous networks such as CDMA 1x EV-DO, HSDPA, 802.16e, and WLAN coexist or integrate. It is changing in the form of a multi-radio environment. At present, there is a need to provide a service that seamlessly manages radio resources of heterogeneous networks to provide seamless services and various services to users.

In order to solve this demand, a model for managing radio network resources between heterogeneous networks by configuring signal interfaces between heterogeneous networks has been proposed. However, this is a disadvantage that the overall network (optimality) is degraded because of lack of global information, and the performance of the network is degraded due to a lot of overhead traffic during the negotiation process It also implies the possibility of importing. In addition, such a network management model is difficult to modify the system according to the continuous introduction and upgrade of the system has a problem that the scalability is weak.

First, even in heterogeneous converged networks, solutions to traditional radio resource management (RRM) problems such as Call Admission Control (CAC), Load Control (LC), Handover Control (HC), and Power Control (PC) are obviously 1 It will be a primary concern. However, in the heterogeneous integrated network environment rather than a single network, each of the above problems becomes very difficult to solve.

In addition, when performing traffic redistribution for load balancing of multiple networks through CRRM in a multi-radio network environment, the question of how often to redistribute traffic by updating the CRRM is not addressed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to update radio network information to CRRM every fixed time in a multi-radio network, so that CRRM is a radio resource between heterogeneous networks based on the network information. It is an object of the present invention to provide an update method and apparatus for CRRM operation in a multi-radio network that efficiently provide the solution.

The present invention has been made in view of the above circumstances, and another object of the present invention is to update radio network information to CRRM at predetermined time intervals set by each network in a multi-radio network, thereby using the radio resources between heterogeneous networks. It is an object of the present invention to provide an update method and apparatus for CRRM operation in a multi-radio network that efficiently provide the information.

The present invention has been made in view of the above-described circumstances, and another object of the present invention is to provide network information to CRRM by adding or subtracting update time according to a situation, so that CRRM uses the network information to wirelessly communicate between heterogeneous networks. An object of the present invention is to provide an update method and apparatus for CRRM operation in a multi-radio network that efficiently provides resources.

An update method for CRRM operation in a multi-radio network according to the first aspect of the present invention for achieving the above object,

a) at least two different networks transmitting each network related information to a common radio resource manager (CRRM) that manages the networks at a fixed update time; b) generating a reference value based on the network related information in the CRRM; And c) redistributing traffic of the network based on the reference value in the CRRM.

An update method for CRRM operation in a multi-radio network according to a second aspect of the present invention for achieving the above object,

Iii) transmitting at least two different networks each network related information to a common radio resource manager (CRRM) that manages the networks at an update time changed according to the respective network conditions; Ii) generating a reference value based on the network related information in the CRRM; And iii) redistributing traffic of the network based on the reference value in the CRRM.

The common radio resource operating apparatus in the multiple radio network according to the third aspect of the present invention for achieving the above object,

An update management module for receiving each network related information from at least two different networks at a predetermined update time or at an update time changed according to each network situation; And a control module for generating a reference value based on the network related information and redistributing traffic of the network based on the reference value.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

As shown in FIG. 1, a common radio resource manager 100 (hereinafter referred to as CRRM) is a wireless access network such as CDMA 1x, CDMA 1x EV-DO, WCDMA, HSDPA, and 802.16e. networks are connected to multiple wireless networks consisting of at least two different networks.

That is, the CRRM 100 is connected to each CN (Core Network) of CDMA 1x, CDMA 1x EV-DO, WCDMA, HSDPA, and 802.16e, and the CRRM and each network through an interface / interpreter inside the CRRM. Communicate with.

2 is a schematic internal block diagram of the CRRM 100 of FIG.

The CRRM 100 includes: an update management module 140 for receiving each network related information from at least two different networks at a predetermined update time or at an update time changed according to the respective network conditions; And a control module 160 for generating a reference value based on the network related information and redistributing traffic of the network based on the reference value.

The update management module 140 receives network related information at a predetermined time set for each network set based on at least one of a usage pattern and a capacity of each network.

In one application example, the update management module 140 may add or subtract the interval of the update time according to a result of the control module 160 determining whether the networks are stable based on the network-related information. Notify by.

The control module 160 analyzes the network related information and notifies the update management module 140 to increase the update time by a predetermined time when each load value is equal to or greater than a predetermined value.

The operating state of the present invention configured as described above will be described.

In the first embodiment, the networks transmit their network information to the CRRM at a fixed update time. In the second embodiment, the network information is transmitted to the CRRM at a flexible time according to the situation of each network. Explain about performing an update by sending it to.

[First Embodiment]

At least two different networks of the radio access networks as described above transmit each network related information to a common radio resource manager (CRRM) that manages the networks at a fixed update time.

At this time, each network reports the network related information as CRRM using a synchronous method at the fixed update time. That is, all networks simultaneously upload the network related information to the CRRM at the same time so that the load distribution of all the networks can be determined simultaneously in the CRRM.

In one application, the networks transmit the network information to the CRRM according to a schedule set in each using an asynchronous method. In this case, the update time may be set in the CRRM based on the characteristic information such as the capacity of each network, and in another application example, the update time may be set in each network and the update time may be reported as the CRRM.

Second Embodiment

In the second embodiment, the reporting period is changed according to the network situation so that the operation of the CRRM can be changed according to the network situation.

In one application, all networks are set to update network information to CRRM at the same time, and the reported CRRM redistributes traffic to balance the load distribution across all networks. However, this same update time interval can be added or subtracted by CRRM depending on the situation of the entire network.

For example, the CRRM 100 that collects network-related information due to the arrival of the update time determines whether the network is stable for each network (S310, S320, and S330).

If the network is stable, increase the reporting time interval of each network by a certain unit to reduce the number of CRRM operations, so that the unnecessary network does not operate when the entire network is stable, that is, the load distribution of the network is balanced. (S340).

In addition, in a situation opposite to the above, that is, when the network is unstable, that is, when the load distribution of the network is unbalanced, the update time interval is shortened so that each network frequently provides information to the CRRM so that the CRRM is applied to the entire network. It helps to speed up the load distribution.

In another application, each network compares its load with its neighboring network, and if the load value exceeds a predetermined value, requesting traffic redistribution to the CRRM, the CRRM sends the update time to the network. The interval is shortened to a predetermined time and notified. Then, each network transmits network information to the CRRM at the informed time interval.

If the network information received from the network is analyzed and the load value is less than the predetermined value due to the traffic redistribution, the CRRM increases the interval of the update time to a predetermined time and notifies each network. Then, each network transmits network information to the CRRM at the informed time interval.

As described above, the CRRM 100 that receives network-related information for each fixed update time or update time that is changed according to a network situation generates a reference value based on the network-related information (S350).

Next, when the common radio resource operating apparatus 100 redistributes traffic of the network based on the reference value in the CRRM, the mobile terminal belonging to the network to be redistributed to the traffic is transferred to another network configured in the CRRM. Handover or access selection is performed (S360).

As described in detail above, according to the update method and apparatus for CRRM operation in the multiple wireless network of the present invention, based on the concept of managing the networks that were previously managed individually as one unified network, By providing a method for access selection through CRRM in a multi-radio networks environment, there is an advantage that the CRRM can be effectively operated.

 By updating the network information to CRRM every fixed time in multiple wireless networks, if the overall load distribution is severely unbalanced in multiple wireless networks, CRRM can identify all the network information at the same time and solve the imbalance between networks quickly. The effect is that you can.

In addition, in a multi-radio network, each network can be configured to update the network information by CRRM at a predetermined time, which has the advantage that the update can be performed by reflecting the characteristics of each network.

In addition, the network can upload the network information to the CRRM by adding or subtracting the update time according to the situation, so that the CRRM can flexibly cope with the traffic redistribution according to the network situation.

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

Claims (14)

delete delete delete delete a) at least two different networks transmitting resource information of their own network to a common radio resource manager (CRRM) managing the networks at an update time set for each network; b) redistributing traffic of the network based on resource information of the network in the CRRM; The update time set for each network is An update method for CRRM operation in multiple wireless networks, characterized in that it is set based on capacity information of each network. delete At least two different networks transmitting their network resource information to a common radio resource manager (CRRM) that manages the networks at the same update time; Redistributing the traffic of the network based on the network resource information in the CRRM; and And comparing the loads of the networks with their neighboring networks, and determining whether the load distribution is balanced or unbalanced. In a balanced case, the network determines that the network is stable to increase the update time, and if it is unbalanced, the network determines that the network is unstable and reduces the update time. Way. a) at least two different networks transmitting resource information of their own network to a common radio resource manager (CRRM) managing the networks at an update time set for each network; b) redistributing traffic of the network based on the resource information of the network in the CRRM; and c) comparing the loads of the networks with the neighboring networks, and determining whether the load distribution is balanced or unbalanced. In a balanced case, the network determines that the network is stable to increase the update time, and if it is unbalanced, the network determines that the network is unstable and reduces the update time. Way. The method of claim 8, In step a) above, Comparing the loads of the respective networks with their neighboring networks; Requesting traffic redistribution to the CRRM when the load value exceeds a predetermined value; And And reporting, by the CRRM, to the network by shortening the interval of the update time to a predetermined time. The method of claim 9, wherein in step a), And analyzing the network resource information received from the network and notifying each network by extending the interval of the update time to a predetermined time when the load value is less than or equal to a predetermined value due to the traffic redistribution. Update method for CRRM operation in multiple wireless networks. delete delete delete delete

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