KR20090044008A - Method of constructing meta network for managing crrm in multi-access networks - Google Patents

Abstract

A method of configuring a meta network for CRRM operation in a multi-radio network is disclosed. The present invention provides a policy of at least one of cell load and cell capacity received from multiple networks and a common radio resource management apparatus (hereinafter referred to as CRRM). Generating a virtual price based on; b) the CRRM sharing information about the movement of the traffic with a meta network for a traffic distribution of the entire network; c) receiving a priority list from the meta network and attempting to connect to the highest network among the priority lists by a mobile terminal attempting to access one of the multiple networks.

Multi-radio network, CRRM, radio resource, meta network

Description

METHOD OF CONSTRUCTING META NETWORK FOR MANAGING CRRM IN MULTI-ACCESS NETWORKS}

The present invention relates to a mobile communication system, and more particularly, to a multi-network (multiple wireless network network) including a wireless access network such as CDMA 1x, CDMA 1x EV-DO, WCDMA, HSDPA, and 802.16e. The present invention relates to a meta network configuration method for operating a CRRM using a meta network.

In the current wireless network environment, heterogeneous networks such as CDMA 1x EV-DO, HSDPA, 802.16e, WLAN, etc. coexist and exist in the existing form in which single networks such as CDMA 1x, WCDMA, and GSM independently provide services. And / or in the form of an integrated multi-radio environment. Accordingly, in line with such changes in the environment, there is a demand for providing seamless connectivity and various services to users by managing radio resources of heterogeneous networks in an integrated manner.

In order to solve this need, a model for managing radio network resources between heterogeneous networks by configuring signal interfaces between heterogeneous networks has been proposed. However, this has the disadvantage that the optimality of the entire network is lowered due to the lack of information on the entire wireless network, and the performance of the network is degraded due to a lot of overhead traffic required 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 is a problem that the scalability (scalability) is lowered.

The problems of RRM (Radio Resource Management) in such multiple wireless networks can be divided into Call Admission Control (CAC), Load Control (LC), Handover Control (HC), and Power Control (PC) as dealt with in the existing single network. Can be. However, in a heterogeneous converged network environment rather than a single network, each of these problems can be very difficult to solve.

Various technologies such as Ambient Network in Europe, Medium Independent Network (MIH) as IEEE standard, etc. have been proposed to perform the functions of the existing RRM in a multi-radio network environment, but are actually realized without major modification of existing networks and terminals. It is regarded as a technology that is not possible, and it shows that it is impossible to realize without huge investment fund which is almost equal to the amount of new network.

Based on these backgrounds, there is an urgent need for a method of effectively operating radio resources by configuring a meta network in a multi-radio network environment.

The present invention was created in view of the above circumstances, and an object of the present invention is to add a new type of module for the operation of CRRM, so that both the terminal and the network are connected, and the requested information can be obtained whenever necessary in such an environment. The present invention provides a meta network configuration method for CRRM operation in a multi-radio network capable of implementing a realistic meta network.

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

a) based on information of at least one of cell load and cell capacity received from multiple networks and a policy of a common radio resource management apparatus (hereinafter referred to as CRRM); Generating a virtual price;

b) the CRRM sharing information about the movement of the traffic with a meta network for a traffic distribution of the entire network; And

c) receiving a priority list from the meta network and attempting to connect to the highest network among the priority lists by a mobile terminal attempting to access one of the multiple networks.

As described in detail above, according to the method for configuring a meta network for CRRM operation in a multi-radio network according to the present invention, in order to realize a meta network, the existing legacy networks are minimally modified and the existing networks are integrated. Can be managed to maximize the gain.

In addition, since it is not to develop a new technology to construct a meta network, but to apply existing technologies, the technology required to realize the concept of the meta network can use the developed technology so that the cost of technology development Minimize the effect.

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

A meta network is defined as a virtual network that is always connected to the surroundings so that a terminal or a network can obtain necessary information whenever it wants in a multi-network environment.

CRRM must manage resources of various networks in common in multiple wireless networks, and efficiently use the radio resources. In order to realize such CRRM, the concept of the meta network must be applied. This is because from the terminal's point of view, the terminal can maintain an organic relationship with the CRRM by acquiring and transmitting necessary information through the meta network. .

1 illustrates an example of a multiple wireless network including a CRRM according to an 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. access network) and is connected to a multiple radio network composed 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.

Connected to each CN (Core network) of CDMA 1x, CDMA 1x EV-DO, WCDMA, HSDPA, 802.16e of interest, and communication between CRRM and each network through interface / interpreter inside CRRM Will be.

2 is a schematic diagram of a meta network configuration according to an embodiment of the present invention.

The meta network performs a function of solving a charging problem considering multiple networks in a multiple wireless network, providing a guide for handover, selecting an initial connection of a mobile terminal, and supporting communication between multiple operators.

First, the meta network can solve the billing problem considering multiple networks. To configure the meta network under the CRRM operation, the meta network forms a management plan that performs functions corresponding to the common functions of the entire multi-radio network. At this time, several networks have different billing systems, and users can be divided into users who want a low price and users who want a good service even if they pay more. This reflects the user's preference, and the CRRM may generate a reference value (reference value) in consideration of this.

Secondly, the meta network performs a function of providing a guide for handover. When the mobile terminal attempts to move from the current network to another network, the meta network gives down information about the neighboring network in the meta network. Allow over to be performed.

Third, the meta network provides an initial access selection function of the mobile terminal. When the terminal attempts to access a network by power-on stage, the meta network provides necessary information to the terminal. Provides a guide on which network to try to enter. In this process, unnecessary registration and network movement can be prevented and time can be shortened.

Lastly, the meta network provides a function to support communication between multiple operators. When the roaming support is supported in an environment in which multiple operators are operated, the meta network may effectively manage the network. Can be.

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

3 is a flowchart illustrating a method for configuring a meta network for CRRM operation in a multi-radio network according to an embodiment of the present invention. 3 illustrates a method of attempting connection when the meta network is connected to the CRRM and can communicate with all mobile terminals.

The present embodiment will be described by taking an example of performing an access selection function in a CRRM operated by a network, among a network-driven, mobile terminal-driven, and hybrid CRRM operation technique.

In the present embodiment, a quantitative value of the load is calculated by defining a list of loads corresponding to uplink and downlink in the concept of capacity for each network as shown in the following table. In addition, an arrangement of each network and a cell is defined, and a preference for each network, which is one of CRRM policies, is defined.

At this time, such a policy defined in CRRM is related to load, and based on dynamic information of network by defining conditions on how to move or induce load of entire network separately in CRRM, apart from reference value (radio resource status). It provides a flexible network management method by adding static information to the basic concept of CRRM.

Table 1 shows an example of the characteristics of the network.

CDMA 1x CDMA 1x EV-DO Rev. A WCDMA HSDPA 802.16e (Wibro) Uplink capacity (diverse formats) 1.0 dB (interference) 1.0 dB (interference) 1.0 dB (interference) 50 (number of users) 70 (number of users) Downlink total throughput 256 Kbps 3.1 Mbps 384 Kbps 14.4 Mbps 46 Mbps

As shown in FIG. 2, in the multi-network network environment of the present invention, cells 210 of different networks are configured to overlap or neighbor.

Accordingly, in the embodiment of the present invention, for the sake of clarity, it is assumed that five networks each include only one cell and are located at the same geographical location. In other words, if the capacity of the mobile terminal is satisfied, it indicates that a selection for connection to any network can be made. Each cell is configured as shown in Table 2 below.

Cell # One 2 3 4 5 network CDMA 1x CDMA 1x EV-DO WCDMA HSDPA 802.16e (Wibro) Current state of uplink / downlink loads 0.4 dB / 128 Kbps 0.2 dB / 0.93 Mbps 0.4 dB / 172.8 Kbps 20 / 7.2 Mbps 42 / 32.2 Mbps

In determining the policy of CRRM in one application, the network preference is that data services are determined in order of HSDPA, 802.16e, CDMA 1x EV-DO, WCDMA, and CDMA 1x, and voice services are CDMA 1x, WCDMA, The preference is determined in the order of HSDPA, 802.16e, and CDMA 1x EV-DO. At this time, CDMA 1x EV-DO, HSDPA, and 802.16e use VoIP.

In this state, when the mobile terminal under CRRM operation attempts to enter the network, the mobile terminal detects a signal of the meta network in order to determine which network receives the information from the CRRM to enter (S310). , S320).

When a mobile terminal enters a network under a single network situation, a synchronization and registration process is generally performed to receive necessary information from a specific network, and a paging channel or a broadcasting channel of the network is used. Receive information through

However, in a multi-radio network environment in which CRRM is operated, it is necessary to consider the issue of which network collects necessary information when a mobile terminal supporting dual or multi mode first attempts to enter a network.

In an environment in which the meta network of the present invention is operated, the mobile terminal detects a signal of the meta network, and then attempts to register through the access channel of the meta network (S330).

By acquiring information through the paging channel of the meta network, it is possible to reduce waste of time and resources caused by the mobile terminal attempting to access a specific network (S340). That is, since the management plane is independent, no matter what network the mobile terminal moves to, the management plane and the terminal are connected so that communication of control messages is always possible.

The information to be delivered in the CRRM is transmitted through the meta network, and the terminal can acquire the entire information necessary for access selection without accessing a specific network.

The CRRM obtains information corresponding to the load from each network as described above. At this time, the load on the uplink and the downlink of each network is treated differently.

Each network reports the load in CRRM. First, when the uplink and downlink load amounts are converted into percentages, a value corresponding to a large value is sent so that there is no error in comparison. Second, another method may average the load of each of the uplink and downlink and send the network to the CRRM with reference to the value.

Finally, an example may be a method of determining which to use in CRRM by sending both values reported by the network to the CRRM in the first and second.

CRRM calculates the reference value based on the information received from each network. In the embodiment of the present invention, for simplicity, it is assumed that a reference value is obtained in the form of a load / capacity. The definition is as follows.

VP = f (load, capacity) = load / capacity

In practice, the reference value can be converted as follows based on the values presented as examples above. (Converted by taking a high value in the uplink.)

Cell # One 2 3 4 5 Load current state% (up / down) 40/50 20/30 40/45 40/50 60/70 Reference value 0.5 0.3 0.45 0.5 0.7

In CRRM, a priority list can be constructed based on reference values. In addition, it is possible to adjust (or override) the reference value by imposing a policy of CRRM. At this time, the priority list corresponds to decision-making in CRRM. An example of two cases is as follows.

That is, the first priority list constructed using only reference values is first # 2, # 3, second # 1, # 4, and third # 5. In addition, the second priority list constructed using both the reference value and the policy is # 1, # 4, second # 1, # 3, and third # 5.

The first priority list is a value determined only by the value of the reference value, which is directly related to each cell cell source usage rate. However, the second priority list is a policy applied by the CRRM. That is, it drives more traffic toward HSDPA.

Based on the result of CRRM, CRRM decides what action to take for load balancing of all connected networks or CRRM policy, and decision-making result is delivered to mobile terminal through meta network to It will try to match.

In other words, according to the CRRM's decision, the access is attempted to the place where the priority list is low (where the resource utilization is high) rather than the place where the priority list is high (the resource utilization is low).

Finally, the mobile terminal should try to select access according to the priority list determined by the CRRM unless there is a special reason such as physically impossible according to the decision of the network.

After acquiring the priority list as described above, the mobile terminal synchronizes with the highest priority, and when the synchronization is synchronized, access is requested to the synchronized network (S350, S360, S370, S375, S385).

However, if the synchronization is not found as a result of the determination in step S375, the mobile terminal is connected to the network by moving to the next priority list to synchronize the synchronization (S380 and S390).

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.

According to the meta network configuration method for CRRM operation in the multi-radio network of the present invention, the meta network configuration can be applied to the existing commercialized wireless technology, in order to interwork the existing network and the existing meta network The advantage is that it can be realized by replacing the minimum hardware and upgrading the software.

Meta network can provide many advantages to MVNO operators who do telecommunications by borrowing bandwidth from various companies without owning a network directly. For example, MVNO operators are used to integrate networks of multiple network operators. The difficulty of integrating networks transformed by different technologies and local standards can be solved. By using meta networks, multiple networks can be managed as one integrated network.

In other words, the meta network manages a network based on a reference value in consideration of charging in different networks generated from CRRM, or guides when performing a handover to a heterogeneous network. The advantage is that you can do it.

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

2 is a schematic diagram of a meta network configuration according to an embodiment of the present invention.

3 is a flowchart illustrating a method for configuring a meta network for CRRM operation in a multi-radio network according to an embodiment of the present invention.

Claims (4)

a) based on information of at least one of cell load and cell capacity received from multiple networks and a policy of a common radio resource management apparatus (hereinafter referred to as CRRM); Generating a virtual price; b) the CRRM sharing information about the movement of the traffic with a meta network for a traffic distribution of the entire network; And c) receiving a priority list from the meta network and attempting to connect to the highest network among the priority lists by a mobile terminal attempting to connect to one of the multiple networks; How to configure meta network for CRRM operation The method of claim 1, wherein in step c) The mobile terminal attempting to register via an access channel of the meta network; And And acquiring, by the mobile terminal, a priority list of the meta network. The method of claim 2, wherein the mobile terminal, The method of claim 1, wherein the priority list is provided through a paging channel of the meta network. The method according to claim 1, wherein in step c), And if the mobile terminal fails to synchronize with the highest network in the priority list, synchronizes with the network of the next priority in the priority list.

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