KR101995037B1 - Method and Apparatus for Distribution of Wireless Resource In LTE-WiFi Aggregation system - Google Patents

Abstract

A method and apparatus for distributing radio resources in an LWA system are disclosed. A method for allocating a radio resource in an LWA system according to an embodiment of the present invention is a method for allocating LTE resources and WiFi resources to a base station in an LWA (LTE-WiFi Aggregation) system, Calculating a LTE resource exhaustion rate which is a ratio of an LTE resource contract amount to an LTE resource usage amount by accumulating the resource requirement amount of each user based on the LTE resource exhaustion rate, Selecting a UE as a resource user, and distributing LTE resources to the selected LTE resource user.

Description

[0001] The present invention relates to a method and an apparatus for distributing wireless resources in an LWA system,

The present invention relates to a radio resource allocation method and apparatus in an LWA (LTE-WiFi Aggregation) system, and more particularly, to a method and apparatus for allocating LTE resources by selecting an LTE resource user based on the amount of exhaustion, And more particularly, to a radio resource allocation method and apparatus in an LWA system.

In recent mobile communication services, wireless data traffic is rapidly increasing due to rapid spread of smart phones and rapid increase of wireless Internet use due to performance enhancement. In order to cope with such increase of traffic, the processing capacity and performance of the radio access network and the packet core network are increased. However, there are many problems such as a huge investment cost and a failure to sufficiently cope with an increase in traffic.

As a variety of solutions for solving such a situation, wireless LAN (WLAN) interworking or wireless LAN load balancing technologies for distributing traffic concentrated on wireless access networks to other networks have been researched and developed .

The WLAN interworking method utilizes a mobile terminal having both a mobile communication and a wireless LAN matching function to activate a wireless LAN interworking function in addition to a mobile communication matching function in a specific time and space condition, Quot; is used at the same time to use the wireless Internet service.

Recently, wireless LAN interworking methods in wireless access networks have been researched and developed in various forms. The LAA (Licensed Assisted Access) method, which applies a modified mobile communication scheme to a wireless LAN frequency band, combines two wireless paths between a license-based mobile communication scheme and a license- And an LWA (LTE and Wi-Fi Aggregation) method in which a mobile communication method and a wireless LAN method are simultaneously used in combination with an information transmission path (link level) inside a wireless access network while using the existing wireless LAN method unchanged This is true.

LWA is a technology that uses an LTE licensed band as an anchor and aggregates WiFi using license-exempted bandwidth at the same time. That is, when a terminal accesses an LTE base station (eNB) and requests a service, the LWA is a technique that the LTE base station looks at the situation of the network and transmits a service traffic amount of a certain portion using WiFi. In this way, LWA operates LTE and WiFi at the same time, and divides the traffic demanded by users into LTE and WiFi.

However, in the conventional LWA, it is focused on maximizing the system efficiency (maximizing the transmission rate) by distributing the traffic between the LTE and the WiFi according to the network situation. Therefore, in the case of using the two links at the same time, I can not. In other words, there is not enough technique to effectively deal with requirements such as requiring users to allocate more service traffic to cheaper WiFi links than expensive LTE links.

Therefore, it is required to develop a technique for distributing LTE resources and WiFi resources in the LWA to balance user's needs while satisfying user-demanded traffic, thereby balancing the allocation of radio resources.

In this regard, Korean Patent Publication No. 10-2017-0036520, titled " Efficient D2D / cellular communication path selection method in heterogeneous wireless communication network ", exists.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and an apparatus for allocating radio resources in an LWA system that can distribute LTE resources and WiFi resources in a balanced manner while reflecting user selection while satisfying user demand traffic in the LWA.

The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a method for allocating an LTE resource and a WiFi resource in a LWA (LTE-WiFi Aggregation) system in a LWA system according to an embodiment of the present invention, Calculating a LTE resource exhaustion rate, which is a ratio of an LTE resource contract amount to an LTE resource usage amount, for each of a plurality of users who are requested to access; accumulating each user's resource requirement amount based on the LTE resource exhaustion rate, Selecting an LTE resource user as a user before the LTE resource user, and distributing the LTE resource to the selected LTE resource user.

Preferably, the step of calculating the LTE resource consumption rate includes determining whether the LWA is available through the capability of the plurality of users, calculating an LTE resource contract amount and an LTE resource contract amount for each of the plurality of users, And calculating the LTE resource exhaustion rate which is a ratio of the LTE resource usage to the present.

Preferably, the step of selecting as the LTE resource user comprises the steps of: sorting the plurality of users based on the LTE resource exhaustion rate; accumulating the resource requirement amount of each user in order of decreasing LTE resource exhaustion rate; And selecting users as LTE resource users until the value exceeds the LTE resource total available capacity.

Advantageously, the step of distributing the LTE resources may distribute LTE resources based on the LTE resource consumption rate or the LTE resource requirement of each of the LTE resource users.

Preferably, when using the LTE resource consumption rate, a value based on the ratio of the total LTE resource consumption rate of the LTE resource users to the LTE resource consumption rate of the corresponding user is multiplied by the total available LTE resource amount, Value is divided by a value based on the number of LTE resource users, and the LTE resource corresponding to the value calculated by the sharing operation can be distributed to a corresponding user.

Preferably, when the LTE resource requirement is used, a ratio of a sum of the LTE resource requirement amounts of the LTE resource users to an LTE resource requirement amount of the corresponding user is multiplied by an LTE resource total available amount, The LTE resources to be distributed to the users.

Preferably, the step of selecting as the LTE resource user may further include the step of allowing a user other than the LTE resource users to access the WiFi through RRC connection reconfiguration.

According to another aspect of the present invention, there is provided an apparatus for distributing LTE resources and WiFi resources in an LTE-WiFi aggregation (LWA) system according to another embodiment of the present invention, An LTE resource exhaustion rate calculating unit for calculating an LTE resource exhaustion rate, which is a ratio of a resource contract amount to a LTE resource usage amount, a cumulative amount of resource requirement of each user based on the LTE resource exhaustion rate, An LTE resource user selection unit for selecting as a resource user, and a radio resource allocation unit for distributing LTE resources to the selected LTE resource user.

Preferably, the LTE resource consumption rate calculation unit determines whether LWA is possible through the capability of the plurality of users, and determines, for each of the plurality of users, the LTE resource contract amount and the LTE resource contract amount The LTE resource consumption rate, which is a ratio of the usage amount, can be calculated.

Preferably, the LTE resource user selecting unit may sort the plurality of users based on the LTE resource consumption rate, accumulate the resource requirement of each user in order of decreasing the LTE resource consumption rate, Users can be selected as LTE resource users before the total available capacity of resources is exceeded.

Advantageously, the radio resource allocator may distribute LTE resources based on the LTE resource consumption rate or the LTE resource requirement of each of the LTE resource users.

Preferably, when using the LTE resource consumption rate, a value based on the ratio of the total LTE resource consumption rate of the LTE resource users to the LTE resource consumption rate of the corresponding user is multiplied by the total available LTE resource amount, Value is divided by a value based on the number of LTE resource users, and the LTE resource corresponding to the value calculated by the sharing operation can be distributed to a corresponding user.

Preferably, when the LTE resource requirement is used, a ratio of a sum of the LTE resource requirement amounts of the LTE resource users to an LTE resource requirement amount of the corresponding user is multiplied by an LTE resource total available amount, The LTE resources to be distributed to the users.

Advantageously, the radio resource allocator may allow a user other than the LTE resource users to access the WiFi through RRC connection reconfiguration.

According to the present invention, an LTE resource user is selected based on the amount of exhaustion of the LTE resource contract amount of each of a plurality of users who are requested to be connected, and the LTE resource is distributed to reflect user selection while satisfying user demanded traffic, LWA system resources can be distributed in a balanced manner.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood to those of ordinary skill in the art from the following description.

1 is a view for explaining an LWA system according to an embodiment of the present invention.
2 is a diagram illustrating a LWA wireless protocol structure for a collocated scenario.
3 is a diagram illustrating a LWA wireless protocol structure for a non-collocated scenario.
4 is a flowchart illustrating a method for allocating LTE resources and WiFi resources to a base station in an LWA system according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of a radio resource distribution apparatus in an LWA system according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In this specification, LTE resources may have the same meaning as LTE link, LTE traffic, LTE bandwidth, etc. Wi-Fi resources may have the same meaning as Wi-Fi link, Wi-Fi traffic, Wi-Fi bandwidth,

In this specification, WiFi and WLAN may have the same meaning.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 illustrates a LWA system according to an exemplary embodiment of the present invention. FIG. 2 illustrates a LWA radio protocol structure for a collocated scenario. FIG. 3 illustrates a LWA radio protocol structure for a non- FIG.

 1, the LWA system according to an exemplary embodiment of the present invention includes at least one user equipment (UE) 100, a base station 200, a WT (WLAN termination) 300, and a core network 400 .

The terminal 100 is a communication device that is moved by a user. The terminal 100 may be fixed or mobile and may be referred to by other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device,

The base station 200 generally refers to a station that communicates with the terminal 100 and includes a Node-B, an evolved Node-B, a sector, a site, a BTS A base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), a small cell, A macro cell, a microcell, a picocell, a base station controller (BSC), a WCDMA NodeB, an LTE eNB or a sector (site) , Femtocell and relay node, RRH, RU, and small cell communication coverage. Therefore, a base station is collectively referred to as a base station, collectively referred to as a megacell, macrocell, microcell, picocell, femtocell, small cell, RRH, antenna, RU, low power node do.

Preferably, the base station 200 may be an evolved node-B (eNB), and a plurality of terminals 100 may exist in an area covered by each base station.

The base station 200 supports the LTE-WiFi aggregation (LWA) operation and sets up the LTE resource and the WiFi resource to use the terminal 100 requested to be connected.

On the other hand, two scenarios can be supported depending on the backhaul connection between LTE and WLAN in the LWA. One is a non-co-located LWA scenario for a non-ideal backhaul and the other is a co-located LWA scenario for an ideal / internal backhaul.

In a non-co-located LWA scenario, the base station 200 may be connected to one or more WLAN terminations (WTs) 300 via the Xw interface. The WT 300 terminates the Xw interface to the WLAN. That is, the WT 300 may be a logical node terminating the Xw interface at the WLAN side, and the 3GPP may not specify where to implement it

In a co-located LWA scenario, the interface between LTE and WLAN may be implementation dependent. For LWA, the only interfaces required for the core network 400 are S1-U and S1-MME, which terminate at the base station 300. A core network interface may not be required for the WLAN. The core network 400 includes a mobility management entity (MME) and a serving gateway (S-GW). The MME / S-GW may be placed at the end of the network. A packet data network (PDN) gateway (P-GW) can be connected to an external network.

In addition, the radio protocol architecture (architecture) used by a particular bearer in the LWA may depend on the LWA backhaul scenario and the way the bearer is set up. There are two bearer types for LWA as shown in FIG. 2 and FIG. One is a split LWA bearer, and the other is a switched LWA bearer. A split LWA bearer represents a bearer where the radio protocol is present in both the base station and the WLAN in order to use both LTE resources and WLAN resources. A switched LWA bearer represents a bearer in which the wireless protocol is present in both the base station and the WLAN but uses only WLAN resources.

FIG. 2 shows a LWA radio protocol structure for a collocated scenario, and FIG. 3 shows a LWA radio protocol structure for a non-collocated scenario.

In the LWA operation, the LTE-WLAN Aggregation Adaptation Protocol (LWAAP) generates an LWA PDU including the DRB identifier for the PDUs transmitted through the WLAN. The WT 300 transmits the LWA EtherType use. The terminal 100 uses the LWA EtherType to determine whether the received PDU belongs to the LWA bearer. And uses the DRB identifier to determine which LWA bearer the PDU belongs to.

On the downlink, the LWA supports a split bearer operation in which the PDCP sublayer of the UE 100 supports in-sequence delivery of upper layer PDUs based on a reordering procedure introduced in dual connectivity. PDCP PDUs in the uplink are sent only through LTE.

Thus, in the Rel-13 LWA bearer, the split LWA bearer and the Switched LWA bearer constitute an LTE Layer 2 entity for uplink transmission to the UE 100 in order to transmit PDCP PDUs on the uplink on the LTE. Therefore, the UE 100 uses the reordering function applied to the dual-connectivity split bearer specified in the PDCP standard when the split LWA bearer is configured as well as when the Switched LWA bearer is configured in the UE. When the reconfiguration of the Switched LWA (reconfiguration from the LTE bearer to the Switched LWA bearer or reconfiguration from the Switched LWA bearer to the LTE bearer) occurs, the UE reorders the outgoing PDUs out of order through the two paths, Could.

As described above, the base station 200 supports the LTE-WLAN aggregation (LWA) operation and performs aggregation between two radio links through an LWAAP (LWA Application Protocol) connected to a PDCP (Packet Data Convergence Protocol).

In addition, the base station 200 sets up a connection-requested user to use LTE resources and WiFi resources. Specifically, the base station 200 has to confirm whether the users who are requested to access are LWA users. To this end, the base station 200 requests the terminal 100 to transmit a terminal radio access capability (UECapabilityEquiry), and the terminal 100 reports a capability (UECapabilityInformation) including LWA support, supported WLAN band information, do. Then, the base station 200 can confirm whether or not the user supports LWA through the capacity transmitted from the terminal 100.

Then, the base station 200 selects the LTE resource user (s) based on the consumption rate of the LTE resource contract amount of each of the LWA users requested to access for a predetermined period and the LTE resource requirement, and sends the selected LTE resource user Distribute LTE resources, and use WiFi resources for the rest of the users. Here, the exhaustion rate of the LTE resource contract amount may be a ratio of the LTE resource usage to the LTE resource contract amount, and the LTE resource contract amount refers to the LTE resource of the limited capacity allocated by the LWA user according to the contract with the provider, The amount of usage may indicate the amount of LTE resources consumed to date.

In allocating LTE resources to users selected as LTE resource users, the base station 200 distributes the LTE total available capacity optimally based on the Nash equilibrium. That is, the base station 200 can distribute the LTE resources based on the LTE resource consumption rate or the LTE resource requirement of each LTE user. Here, the LTE total available capacity may mean the total capacity of currently available LTE resources.

As described above, the base station 200 can effectively distribute LTE resources and WiFi resources to LTE resource users and WiFi resource users based on the user's LTE resource consumption rate for users requesting access for a predetermined period of time.

A detailed description of how the base station 200 distributes radio resources (LTE resources, WiFi resources) to users who are requested to access the base station will be described with reference to FIG.

4 is a flowchart illustrating a method for allocating LTE resources and WiFi resources to a base station in an LWA system according to an embodiment of the present invention.

Referring to FIG. 4, the base station calculates an LTE resource consumption rate, which is a ratio of an LTE resource contract amount to an LTE resource usage amount, for each of a plurality of users requested to access for a predetermined period of time (S410). At this time, the base station needs to confirm whether the terminals of the users who are requested to access support LWA. Therefore, the base station can request the terminal wireless access capability transmission (UECapabilityEquiry) to confirm whether the corresponding terminal supports the LWA or the WLAN band information supported by the terminal. Then, the terminal reports the capability (UECapabilityInformation) including LWA support, supported WLAN band information, and the like. The base station can confirm whether the user supports LWA through the capability transmitted from the terminal.

If the user is identified as an LWA-enabled user, the base station requests and receives from the core network the LTE resource contract amount of the requested user and the current LTE resource usage. For example, the LTE resource contract amount and the current LTE resource usage can be received from the charging server. Here, the LTE resource contract amount means a limited amount of LTE resources allocated by the user of the LWA system according to the contract with the operator, and the LTE resource usage may indicate the LTE resources that have been used up to now. Also, the base station may request and receive the LTE resource contract amount of the user requested to be connected and the current LTE resource usage amount to the terminal. In addition, the base station may request and receive the LTE resource contract amount of the user and the current LTE resource usage through the capability.

)일 수 있다. LTE 자원을 적게 사용할수록 LTE 자원 소진율은 '0'에 가까운 값을 가질 수 있고, LTE 자원을 많이 사용할수록 LTE 자원 소진율은 '1'에 가까운 값을 가질 수 있다. When the LTE resource contract amount of the LWA resource user and the LTE resource usage up to the present time are received, the base station calculates the LTE resource consumption rate, which is the LTE resource usage amount, with respect to the LTE resource contract amount of the user. At this time, the LTE resource consumption rate (p _k ) is, for example, a value between 0 and 1

). The less the LTE resources are used, the closer the LTE resource exhaustion rate is to '0', and the more the LTE resources are used, the more the LTE resource exhaustion rate can be close to '1'.

)을 기준으로 정렬한 후, 정렬된 사용자들의 자원 요구량을 계속적으로 합연산하여 LTE 총 가용량(

)을 넘지 않을 때까지의 사용자들을 LTE 자원 사용자로 선정한다. 여기서, 자원 요구량은 사용자가 요구하는 전송용량(전송속도) 또는 사용자가 요구하는 전송용량 중 LTE를 이용하여 전송되는 전송용량(즉, LTE 자원 요구량)일 수 있다. LTE 자원 총 가용량은 현재 사용 가능한 LTE 자원의 총 전송용량(또는 총 전송속도)을 의미할 수 있다. When the step S410 is performed, the base station sorts the LWA-enabled users based on the LTE resource consumption rate (S420), accumulates the resource requirement of each user in order of decreasing LTE resource consumption rate (S430) (S440) as the LTE resource user. That is, in order to periodically select an LTE resource user,

), And then calculates the sum of the resource demand of the sorted users continuously to calculate LTE total available capacity

) Is selected as an LTE resource user. Here, the resource requirement may be the transmission capacity (transmission rate) requested by the user or the transmission capacity (i.e., the LTE resource requirement) transmitted using the LTE among the transmission capacity requested by the user. The total available capacity of an LTE resource may refer to the total transmission capacity (or total transmission rate) of the currently available LTE resources.

For example, as a result of sorting the users in the order of the LTE total available capacity of 20 Mbps and LTE resource consumption rate lower, the resource requirement of user 1 is 6 Mbps, the resource requirement of user 2 is 4,5 Mbps, the resource requirement of user 3 is 2.3 Mbps, The resource requirement of the user 5 is 3 Mbps, and the resource requirement of the user 6 is 7 Mbps. In this case, the base station cumulatively calculates the resource requirement of each user in the order of user 1, user 2, user 3, user 4, user 5, and user 6. As a result, since the cumulative operation value to user 3 is 12.8 Mbps and the cumulative operation value to user 4 is 20.9 Mbps, the base station can select user 1 to user 3 that do not exceed the total available capacity of LTE 20 Mbps as an LTE resource user.

After performing step S440, the base station distributes LTE resources to users selected as LTE resource users and distributes WiFi resources to the remaining users (S450).

In distributing LTE resources to users selected as LTE resource users, it is possible to distribute LTE total available capacity optimally based on the Nash equilibrium. To this end, the base station can distribute the LTE resources based on the LTE resource consumption rate or the LTE resource requirement of each LTE user.

)을 수학식 1을 이용하여 산출할 수 있다. First, the case where the LTE resource exhaustion rate is used will be described. In this case, the base station calculates a value based on the ratio of the total LTE resource consumption rate of the LTE resource users to the LTE resource consumption rate of the corresponding user multiplied by the total available LTE resource, and multiplies the calculated value by the product based on the number of LTE resource users And distributes the LTE resource corresponding to the value calculated by the division operation to the corresponding user. That is, the base station transmits the LTE resource (k)

) Can be calculated using Equation (1).

)의 비율에 기초한 값으로,

일 수 있다. Where L is the number of LTE resource users and C _L is the LTE total capacity. α _k is the sum of the LTE resource consumption rates of the LTE resource users and the LTE resource consumption rate of the k-th user

), ≪ / RTI >

Lt; / RTI >

)을 수학식 2을 이용하여 산출할 수 있다. Next, the case of using the LTE resource requirement amount requested by the user will be described. In this case, the base station multiplies the ratio of the sum of the LTE resource requirements of the LTE resource users to the LTE resource requirement of the corresponding user multiplied by the total available LTE resources, and distributes the LTE resources corresponding to the values calculated by the multiplication to the users . That is, the base station transmits the LTE resource (k)

) Can be calculated using Equation (2).

)의 비율로,

일 수 있다. Here, α _k is the sum of the LTE resource requirements of the LTE resource users and the LTE resource requirements of the corresponding users

),

Lt; / RTI >

)을 수학식 3을 이용하여 산출할 수 있다. Lastly, a description will be given of a case where LTE resources are allocated by combining the LTE resource consumption rate and the LTE resource requirement of each LTE user. In this case, the base station can calculate LTE resources to be distributed to each user by combining Equations (1) and (2). That is, the base station transmits the LTE resource (k)

) Can be calculated using Equation (3).

Here, w is a weight, which may be an arbitrary value.

The base station can distribute LTE resources to users selected as LTE resource users by using the above-described method.

Meanwhile, the base station can be connected to the WiFi through the RRC connection reconfiguration in order to allow the users selected as the WiFi resource users to use the WiFi resources. That is, when the WiFi resource user is determined, the base station transmits an RRC connection reconfiguration message including new radio resource configuration information to the WiFi resource user (terminal). Then, the WiFi resource user (terminal) can measure the WLAN radio resource according to the measurement configuration information and transmit the result through the WLAN measurement through the measurement report. The measurement report may include WLAN status information such as the connection status of each WLAN measured by the WiFi resource user (terminal) and the connection quality status of the WLAN radio resource. The UE applies the measurement configuration information and responds by sending an RRC connection reconfiguration complete message to the base station. The new radio resource configuration information may be determined using the measurement report information transmitted by the WiFi resource user (terminal).

Through the above process, users selected as a WiFi resource user can be connected to the WiFi.

The above-mentioned radio resource allocation method uses a small amount of LTE resources to allow a user having a low LTE resource consumption rate to access LTE, and a user having a high LTE resource consumption rate is connected to a WiFi using a large amount of LTE resources. WiFi can be effectively selected at the same time.

Meanwhile, in the embodiment of the present invention, it has been described that the user is distributed in units of terminals using the same meaning as the terminal, but since each user can execute a plurality of applications, the wireless resource can be distributed on an application basis .

5 is a diagram illustrating a configuration of a radio resource distribution apparatus in an LWA system according to an embodiment of the present invention.

5, in the LWA system according to an embodiment of the present invention, the radio resource allocation device 500 includes a communication unit 510, an LTE resource consumption rate calculation unit 520, an LTE resource user selection unit 530, And a distribution unit 540.

The communication unit 510 is configured to communicate with a terminal, and is used to transmit and receive signals, messages, and data necessary for carrying out the present invention.

The LTE resource consumption rate calculator 520 calculates the LTE resource consumption rate, which is a ratio of the LTE resource contract amount to the LTE resource usage amount, for each of a plurality of users who are requested to access for a predetermined period. At this time, the LTE resource consumption rate calculation unit 520 determines whether or not the LWA is available through the capability of a plurality of users that are requested to access, and calculates the LTE resource contract amount and the LTE resource contract amount for each of the LWA- And calculates the LTE resource consumption rate, which is a ratio of resource usage.

The LTE resource user selection unit 530 cumulatively calculates the resource requirement of each user based on the LTE resource consumption rate, and selects the users until the total available capacity of the LTE resources is exceeded. That is, the LTE resource user selection unit 530 sorts a plurality of users based on the LTE resource exhaustion rate. Then, the LTE resource user selection unit 530 cumulatively calculates the resource requirement of each user in the order of the lowest LTE resource consumption rate, and allocates the users until the accumulated value exceeds the total available capacity of the LTE resources as an LTE resource user .

The radio resource distribution unit 540 distributes the LTE resources to the selected LTE resource users in the LTE resource user selection unit 530 and distributes the WiFi resources to the remaining users. This radio resource distribution unit 540 includes an LTE resource distribution module 542 and a WiFi resource distribution module 544. [

The LTE resource distribution module 542 distributes the LTE resources based on the LTE resource consumption rate or the LTE resource requirement of each of the LTE resource users.

Specifically, when using the LTE resource consumption rate, the LTE resource allocation module 542 multiplies a value based on the ratio of the total LTE resource consumption rate of the LTE resource users to the LTE resource consumption rate of the corresponding user by the total available LTE resource amount, The value calculated by the multiplication operation is divided by a value based on the number of LTE resource users, and the LTE resource corresponding to the value calculated by the division operation can be distributed to the user.

In the case of using the LTE resource requirement, the LTE resource allocation module 542 multiplies the ratio of the sum of the LTE resource requirements of the LTE resource users to the LTE resource requirement of the corresponding user multiplied by the total available LTE resources, Can be distributed to the corresponding users.

The WiFi resource distribution module 544 allows users other than LTE resource users to connect to the WiFi through RRC connection reconfiguration.

Meanwhile, the radio resource allocation device 500 according to the present invention may further include a storage unit (not shown) storing programs or applications for LTE resource user selection and LTE resource allocation. In addition, the radio resource distribution device 500 may further include a control unit (not shown) for controlling the operation of various components of the radio resource distribution device 500.

The radio resource distribution device 500 having the above-described configuration may be a base station itself or a device inside a base station.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: terminal
200: base station
300: WT
400: Core Network
500: Radio resource distribution device
510:
520: LTE resource exhaustion rate calculation unit
530: LTE resource user selection section
540: radio resource distribution unit

Claims (14)

A method for a base station to distribute LTE resources and WiFi resources in an LTE-WiFi Aggregation (LWA)
Calculating an LTE resource exhaustion rate, which is a ratio of an LTE resource contract amount to an LTE resource usage amount, for each of a plurality of users requested to access for a predetermined period;
Accumulating the resource requirement of each user based on the LTE resource exhaustion rate, and selecting the users until the total available capacity of the LTE resources is exceeded; And
And distributing LTE resources to the selected LTE resource user,
In distributing the LTE resources,
When using the LTE resource consumption rate of each of the LTE resource users,
A value based on a ratio of the sum of the LTE resource consumption rates of the LTE resource users to the LTE resource consumption rate of the corresponding user is multiplied by the total available LTE resources and the value calculated by the multiplication operation is divided by a value based on the number of LTE resource users And distributing an LTE resource corresponding to a value calculated by the division operation to a corresponding user in the LWA system. The method according to claim 1,
The step of calculating the LTE resource exhaustion rate comprises:
Determining whether the LWA is available through the capability of the plurality of users;
Calculating a LTE resource consumption rate which is a ratio of an LTE resource contract amount to an LTE resource usage amount for each of the LWA capable users among the plurality of users. The method according to claim 1,
Selecting the LTE resource user comprises:
Sorting the plurality of users based on an LTE resource exhaustion rate;
Accumulating the resource requirement of each user in the order of decreasing LTE resource consumption rate and selecting users as LTE resource users until the accumulated value exceeds the total available capacity of LTE resources A method for distributing radio resources in an LWA system. The method of claim 1, wherein
The step of distributing the LTE resources comprises:
The LTE resource consumption rate of each of the LTE resource users or the And distributing the LTE resources based on the required amount.
delete 5. The method of claim 4,
When using the required amount of the LTE resources,
Multiplying the ratio of the total amount of the LTE resources required by the LTE resource users to the required amount of the LTE resources of the corresponding user by the total amount of available LTE resources and distributing the LTE resources corresponding to the values calculated by the multiplication to the users Characterized in that the radio resource allocation method in the LWA system. The method according to claim 1,
After selecting the LTE resource user,
Further comprising, for a user other than the LTE resource users, accessing a WiFi through RRC connection reconfiguration. An apparatus for distributing LTE resources and WiFi resources in an LTE-WiFi Aggregation (LWA) system,
An LTE resource exhaustion rate calculation unit for calculating an LTE resource exhaustion rate, which is a ratio of an LTE resource contract amount to an LTE resource usage amount, for each of a plurality of users requested to access for a predetermined period;
An LTE resource user selecting unit for accumulating the resource requirement of each user based on the LTE resource consumption rate and selecting the users until the total available capacity of the LTE resources is exceeded as an LTE resource user; And
And a radio resource distributor for distributing LTE resources to the selected LTE resource user,
Wherein the radio resource distributor comprises:
When using the LTE resource consumption rate of each of the LTE resource users,
A value based on a ratio of the sum of the LTE resource consumption rates of the LTE resource users to the LTE resource consumption rate of the corresponding user is multiplied by the total available LTE resources and the value calculated by the multiplication operation is divided by a value based on the number of LTE resource users And allocates an LTE resource corresponding to the value calculated by the division operation to a corresponding user. 9. The method of claim 8,
Wherein the LTE resource exhaustion-
Determining whether the LWA is available through the capability of the plurality of users and calculating an LTE resource consumption rate which is a ratio of an LTE resource contract amount to an LTE resource usage amount for each of the LWA capable users among the plurality of users Characterized in that the radio resource distribution device 9. The method of claim 8,
Wherein the LTE resource user selecting unit comprises:
The method includes: sorting the plurality of users based on the LTE resource consumption rate; accumulating the resource requirement of each user in the order of decreasing the LTE resource consumption rate; And selecting the mobile station as a LTE resource user. The method of claim 8, wherein
Wherein the radio resource distributor comprises:
And distributes the LTE resources based on the LTE resource consumption rate of each of the LTE resource users or the required amount of the LTE resources.
delete 12. The method of claim 11,
When using the required amount of the LTE resources,
Multiplying the ratio of the total amount of the LTE resources required by the LTE resource users to the required amount of the LTE resources of the corresponding user by the total amount of available LTE resources and distributing the LTE resources corresponding to the values calculated by the multiplication to the users Characterized in that the radio resource distribution device 9. The method of claim 8,
Wherein the radio resource distributor comprises:
To connect to the WiFi through RRC connection reconfiguration for a user other than the LTE resource users.

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