WO2014017780A1 - 자원할당 방법 및 장치 - Google Patents
자원할당 방법 및 장치 Download PDFInfo
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- WO2014017780A1 WO2014017780A1 PCT/KR2013/006447 KR2013006447W WO2014017780A1 WO 2014017780 A1 WO2014017780 A1 WO 2014017780A1 KR 2013006447 W KR2013006447 W KR 2013006447W WO 2014017780 A1 WO2014017780 A1 WO 2014017780A1
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- base station
- resources
- allocating
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0069—Allocation based on distance or geographical location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a resource allocation method and apparatus.
- LTE Long Term Evolution
- DS dynamic scheduling
- Semi-Persistent Scheduling semi-persistent scheduling
- Dynamic scheduling allocates resources to find the optimal channel for each time to interval (TTI), thereby maximizing channel capacity. However, if a large number of small packets are allocated to the data area by dynamic scheduling, the control area may be saturated.
- Semi-persistent scheduling does not allocate resources for each TTI, but fixes a resource allocation position and a transmission scheme (Modulation and Coding Scheme). Thus, semi-persistent scheduling can reduce the consumption of a Physical Downlink Control Channel (PDCCH). However, semi-persistent scheduling does not maximize channel capacity.
- PDCCH Physical Downlink Control Channel
- the resource allocator so far does not know the resource allocation information of the neighbor cell. Therefore, when using the resource allocation method up to now, the voice quality of service may be lowered due to the mutual interference between cells. In order to avoid inter-cell interference, more radio resources than necessary resources must be allocated, thereby reducing the number of voice service users. In addition, transmission errors may occur due to inter-cell interference, which may reduce data quality of service.
- An object of the present invention is to provide a resource allocation method and apparatus for allocating voice resources without interference of neighboring cells by managing resources of a plurality of cells.
- a method of allocating resources by a resource allocating apparatus comprising: monitoring resource information of a plurality of base stations including a first base station and a second base station, and accessing the first base station from a boundary area. Receiving a resource allocation request of one terminal, checking whether there is a second terminal using a voice service in the boundary area, and if there is the second terminal, based on the resources allocated to the second terminal; And allocating resources of the terminal, wherein the boundary area is an area where the cells of the first base station and the second base station overlap.
- the second terminal may be a terminal using a voice service by accessing the second base station in the border area.
- the resource allocated to the second terminal may be a resource allocated at a predetermined period by fixing a resource allocation position and a transmission scheme.
- the step of allocating the resources of the first terminal may allocate the resources of the first terminal avoiding the resources allocated to the second terminal.
- the step of allocating a resource of the first terminal may include assigning a resource of the first terminal to a location different from the resource allocated to the second terminal in a first level of modulation and coding scheme, and assigning the resource to the second terminal.
- a location such as the above allocates resources of the first terminal to a modulation and coding scheme of a second level lower than the first level, and the modulation and coding scheme of the second level is less than that of the first level modulation and coding scheme. It may be a way of sending data.
- a method of allocating resources by a resource allocating apparatus comprising: receiving a resource allocation request for a voice service of a first terminal, and fixing a resource allocation location and a transmission scheme to the first terminal; Allocating a first resource, receiving a resource allocation request of a second terminal adjacent to the first terminal, and allocating a second resource different from the first resource to the second terminal,
- the first terminal and the second terminal is a terminal connected to a different base station.
- the resource allocation method may further include monitoring resource information of a plurality of base stations including a base station to which the first terminal and the second terminal are connected.
- Each of the first terminal and the second terminal may be a terminal in a boundary area where cells of a first base station connected to the first terminal and a cell of a second base station connected to the second terminal overlap.
- Allocating the first resource includes fixing a resource location for a voice service to a specific subframe, and allocating the first resource for a voice service of the first terminal to the specific subframe;
- the specific subframe may be a subframe repeated at a predetermined period.
- the step of allocating the second resource may allocate the second resource for the data service of the second terminal avoiding the specific subframe.
- the resource allocation method may further include receiving a resource allocation request for a voice service of a third terminal, and allocating a third resource for a voice service of the third terminal to the specific subframe.
- a method of allocating resources by a resource allocating apparatus comprising: monitoring resource information of a plurality of base stations including a first base station and a second base station, wherein the first base station and the second base station Receiving a resource allocation request of the terminal in the overlapping cell area, determining whether resources of each of the first base station and the second base station is free, and the resources of each of the first base station and the second base station If this margin is available, the method includes allocating the same resource to the first base station and the second base station so that the first base station and the second base station provide the same voice service to the terminal.
- the terminal may be a terminal using a voice service in the border area.
- the same resource allocation location and transmission scheme may be allocated.
- the number of voice service users can be increased by providing a voice service with minimum resources by sharing resource information between cells.
- 1 is a diagram illustrating an independent resource allocation method.
- FIGS. 2 and 3 are diagrams illustrating a resource allocation method according to an embodiment of the present invention.
- FIG. 4 is a diagram illustrating a resource allocation method according to another embodiment of the present invention.
- FIG. 5 is a diagram schematically illustrating cooperative scheduling according to an embodiment of the present invention.
- FIG. 6 is a flowchart of a resource allocation method according to an embodiment of the present invention.
- FIG. 7 is a view for explaining a resource allocation method according to another embodiment of the present invention.
- FIG. 8 is a diagram schematically illustrating federated scheduling according to an embodiment of the present invention.
- FIG. 9 is a flowchart of a resource allocation method according to another embodiment of the present invention.
- FIG. 10 is a diagram illustrating a resource allocation method for a voice service according to an embodiment of the present invention.
- FIG. 11 is a block diagram of a resource allocation apparatus according to an embodiment of the present invention.
- a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (User Equipment). , UE), an access terminal (AT), and the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, an access terminal, and the like.
- a base station includes an access point (AP), a radio access station (RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), transmission and reception It may also refer to a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, and the like, and may perform all or part of functions of an access point, a wireless access station, a node B, an eNodeB, a transmission / reception base station, an MMR-BS, and the like. It may also include.
- AP access point
- RAS radio access station
- Node B node B
- eNodeB advanced node B
- MMR mobile multihop relay
- 1 is a diagram illustrating an independent resource allocation method.
- the base station 20 and the base station 21 are adjacent base stations in which some of the cells overlap.
- the terminal 10 may access a base station 20 to use a voice service, and the terminal 11 may access a base station 21 to use a data service.
- the base station 20 and the base station 21 may allocate resources independently without sharing the resource allocation information of the neighboring base stations.
- the base station 20 periodically allocates resources for the voice service of the terminal 10, and the base station 21 dynamically allocates resources for the data service of the terminal 11.
- the base station 20 may allocate one resource every 20ms for voice service. However, the base station 20 that does not know the resource allocation information of the neighbor cell has no choice but to allocate more radio resources than necessary, such as A, in order to reduce interference that may occur due to the influence of the neighbor cell.
- the base station 21 that does not know the resource allocation information of the neighbor cell, such as B may allocate resources overlapping with the resources allocated for the voice service by the neighbor cell. Then, a transmission error occurs, and the base station 21 must retransmit the data or transmit a small amount of data. In addition, since the base station 21 reduces the data transmission amount after the transmission error occurs, the base station 21 transmits the data transmission amount by reducing the amount even though the environment is good. As a result, the data transmission efficiency of the base station 21 is reduced.
- FIGS. 2 and 3 are diagrams illustrating a resource allocation method according to an embodiment of the present invention.
- the mobile communication system includes a plurality of terminals (Mobile Station, User Equipment) 100, 110, a plurality of base stations 200, 210, and a resource allocation device 300.
- a plurality of terminals Mobile Station, User Equipment
- base stations 200, 210, and a resource allocation device 300.
- the terminals 100 and 110 wirelessly access the base stations 200 and 210 to use voice services or data services such as Voice over IP (VoIP).
- VoIP Voice over IP
- the terminal 100 accesses the base station 200 to use the voice service
- the terminal 110 accesses the base station 210 to use the data service.
- Each of the base stations 200 and 210 manages a predetermined size cell.
- the base station 200 or 210 may be a radio unit (RU) that provides a communication service by forming a radio link with the terminals 100 and 110 in the cell.
- Base station 200 and base station 210 are adjacent base stations where some of the cells overlap.
- the terminal 100 and the terminal 110 are in the boundary region of the cell of the base station 200 and the base station 210.
- the resource allocation apparatus 300 allocates resources for the terminals 100 and 110 to access the at least one base station 200 and 210.
- the resource allocation apparatus 300 may allocate resources according to dynamic scheduling (DS) or allocate resources according to semi-persistent scheduling (SPS).
- DS dynamic scheduling
- SPS semi-persistent scheduling
- the resource allocation apparatus 300 integrates and manages the resources of the plurality of base stations 200 and 210.
- the resource allocating apparatus 300 may be a digital signal processing unit (DU) connected to the base stations 200 and 210 through a virtualization technology to perform digital signal processing.
- DU digital signal processing unit
- the resource allocator 300 manages the resources of the two base stations 200 and 210, the resource allocator 300 may collectively manage a myriad of base stations connected by virtualization.
- the resource allocating apparatus 300 allocates the resource 400 of the terminal 100 fixed at regular intervals for the voice service.
- the resource allocation apparatus 300 may allocate a resource for a voice service by semi-persistent scheduling that fixes a resource allocation position and a modulation and coding scheme. In this case, the resource allocating apparatus 300 allocates only resources necessary for the voice service without allocating more radio resources than necessary as described with reference to FIG. 1.
- the resource allocation apparatus 300 allocates the resource 410 of the terminal 110 avoiding the resource 400 of the allocated terminal 100.
- the resource allocation apparatus 300 allocates the resource 412 of the terminal 110 in consideration of the resource 400 of the terminal 100.
- the resource allocating apparatus 300 allocates resources avoiding the resources 400 of the terminal 100, and the same location as the resources 400 of the terminal 100 has a low level of modulation and coding scheme (Modulation and Coding Scheme). , MCS).
- MCS Modulation and Coding Scheme
- the low level modulation and coding scheme is a robust MCS, and a modulation and coding scheme with a low channel code rate. Therefore, the resources allocated to the robust MCS have a low MCS level and thus transmit less data but can safely transmit data.
- the resource allocating device 300 when allocating a resource to the terminal 110 connected to the base station 210, the resource allocating device 300 does not consider only the resource information of the base station 210, but rather the resource information of the adjacent base station 200. I use it. Therefore, although the adjacent base stations 220 and 210 are physically independent, the adjacent base stations 220 and 210 may avoid mutual interference because the resource allocation apparatus 300 performs resource management integrally.
- FIG. 4 is a diagram illustrating a resource allocation method according to another embodiment of the present invention
- FIG. 5 is a diagram schematically illustrating cooperative scheduling according to an embodiment of the present invention.
- the base station 200 and the base station 210 are adjacent base stations in which some of the cells overlap.
- the terminal 100 and the terminal 110 are in the boundary region of the cell of the base station 200 and the base station 210. It is assumed that the terminal 100 accesses the base station 200 to use the voice service, and the terminal 110 accesses the base station 210 to use the voice service.
- the resource allocating apparatus 300 allocates resources of each of the base stations 200 and 210 based on the resource information of the base stations 200 and 210 that are integrated and managed.
- the resource allocating apparatus 300 allocates a resource 420 of the terminal 100 fixed at a predetermined period for a voice service. At this time, the resource allocation apparatus 300 allocates a fixed resource 420 every predetermined period, for example, 20 ms. The resource allocation apparatus 300 allocates the minimum resources necessary for the voice service.
- the resource allocation apparatus 300 allocates the resource 430 of the terminal 110 so as not to overlap with the resource 420 of the terminal 100.
- the resource allocation apparatus 300 allocates the resource 420 of the terminal 100 and the resource 430 of the terminal 110 so that the resource allocation apparatus 300 does not interfere with an adjacent cell. This is referred to as coordinated scheduling.
- the terminal 100 and the terminal 110 are in a boundary region of the cell of the base station 200 and the base station 210.
- the resource allocating apparatus 300 allocates different resources to the terminal 100 and the terminal 110. Accordingly, the terminal 100 and the terminal 110 may use the service without interference of adjacent cells even if the cells are located in the boundary area where the cells overlap.
- FIG. 6 is a flowchart of a resource allocation method according to an embodiment of the present invention.
- the resource allocation apparatus 300 monitors resource information of a plurality of base stations 200 and 210 (S510).
- the resource allocation apparatus 300 allocates a resource for a voice service to the terminal 100 connected to the base station 200 (S520).
- the terminal 100 is in a boundary area between the base station 200 and the base station 210.
- the resource allocation apparatus 300 allocates a resource having a fixed resource allocation position and a transmission scheme.
- the resource allocation apparatus 300 may periodically allocate a minimum resource necessary for the voice service.
- the resource allocation apparatus 300 receives a resource allocation request of the terminal 110 connected to the base station 210 (S530).
- the terminal 110 is in a boundary area between the base station 200 and the base station 210.
- the resource allocation apparatus 300 checks whether there is a terminal using a voice service in the boundary region (S540). This is because, even if the terminals are connected to different base stations, interference may be caused by neighboring base stations if they are in the boundary region. In particular, since the resources for the voice service are fixed in advance, an interference problem may occur if the same resources as those for the voice service are allocated.
- the resource allocation apparatus 300 allocates resources of the terminal 110 to avoid the resources allocated to the terminal 100 using the voice service (S550).
- FIG. 7 is a diagram illustrating a resource allocation method according to another embodiment of the present invention
- FIG. 8 is a diagram schematically illustrating federated scheduling according to an embodiment of the present invention.
- the base station 200 and the base station 210 are adjacent base stations in which part of a cell overlaps.
- the boundary region where some regions of the cell overlap may be a weak electric field region because the edge region of the cell managed by the two base stations 200 and 210. Therefore, if the terminal 100 uses a voice service where some areas of the cell overlap, the quality may not be good.
- the resource allocation apparatus 300 integrates and manages resource information of the base stations 200 and 210. And if the resources of each of the base stations (200, 210) are all available, the resource allocation apparatus 300 allocates the same resources to provide the same voice service to the terminal 100 in the two base stations (200, 210). That is, the resource allocating apparatus 300 allocates a fixed resource 440 between the base station 200 and the terminal 100, and allocates the same fixed resource 450 as the fixed resource 440 to the base station 210 and the terminal 100. Also assign between).
- the resource allocating apparatus 300 allocates resources 440 and 450 for the voice service of the terminal 100 to all adjacent cells. This is called joint scheduling.
- the terminal 100 is located in an area where the cells of the base station 200 and the base station 210 overlap.
- the resource allocating apparatus 300 allocates the same resources for the terminal 100 to both the base station 200 and the base station 210. Accordingly, the terminal 100 may receive voice data from both the base station 200 and the base station 210 even when using the voice service at the edge of the cell, thereby improving the quality of the cell edge.
- FIG. 9 is a flowchart of a resource allocation method according to another embodiment of the present invention.
- the resource allocation apparatus 300 monitors resource information of a plurality of base stations 200 and 210 (S810).
- the resource allocation apparatus 300 receives a resource allocation request for a voice service from the terminal 100 between the two base stations 200 and 210 (S820).
- the resource allocation apparatus 300 determines whether resources of the two base stations 200 and 210 are free (S830).
- the resource allocating apparatus 300 equally allocates the resources for the voice service of the terminal 100 to the two base stations 200 and 210 (S840).
- the resource allocating apparatus 300 allocates a fixed resource 440 between the base station 200 and the terminal 100, and allocates the same fixed resource 450 as the fixed resource 440 to the base station 210 and the terminal 100. Also assign between).
- the terminal 100 may use a high quality voice service in the boundary area through the association of the two base stations 200 and 210.
- FIG. 10 is a diagram illustrating a resource allocation method for a voice service according to an embodiment of the present invention.
- the resource allocation apparatus 300 allocates fixed resources at regular intervals for a voice service.
- the resource allocating apparatus 300 may fix the resource position for the voice service to a specific subframe. For example, in the case of allocating resources for a voice service periodically every 20 ms, the resource allocating apparatus 300 fixes a specific subframe of 1 ms as a resource for the voice service.
- the resource allocation apparatus 300 allocates resources for a voice service only for a specific subframe.
- the resource allocation apparatus 300 should consider all subframes of the neighbor cell when allocating resources for data service. However, since the resource allocating apparatus 300 collects and allocates voice service resources to specific subframes, it is not necessary to consider all subframes of neighboring cells, and only needs to allocate data service resources avoiding specific subframes.
- the resource allocation apparatus 300 can easily estimate the interference in a specific subframe, so that a resource overlapping the specific subframe can be allocated to a low level MCS. Through this, there is an effect that it is possible to limit the resource in which interference between the voice service and the data service occurs to a specific subframe.
- FIG. 11 is a block diagram of a resource allocation apparatus according to an embodiment of the present invention.
- the resource allocation apparatus 300 includes a resource monitoring unit 310 and a resource allocation unit 330.
- the resource monitoring unit 310 monitors the resources of a myriad of base stations, for example, the base stations 200 and 210 connected by virtualization.
- the resource allocator 330 allocates a resource to the terminal based on the monitoring result of the resource monitor 310. At this time, the resource allocating unit 330 allocates fixed resources at regular intervals for the voice service. In addition, the resource allocator 330 allocates a minimum resource necessary for the voice service.
- the resource allocator 330 checks whether a resource for a voice service is allocated to a neighboring terminal when a terminal located at a cell edge of the base station requests a resource. The resource allocator 330 allocates resources so as not to overlap with resources allocated for the voice service.
- the resource allocating unit 330 determines whether resources of the base stations around the terminal are free.
- the resource allocator 330 allocates resources for voice service of the terminal to neighboring base stations in the same manner. Accordingly, the terminal may receive voice data from a plurality of neighboring base stations.
- the number of voice service users can be increased by providing a voice service with minimum resources by sharing resource information between cells.
- the embodiments of the present invention described above are not only implemented through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded.
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Abstract
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Claims (14)
- 자원할당장치가 자원을 할당하는 방법으로서,제1기지국과 제2기지국을 포함하는 복수 기지국의 자원 정보를 모니터링하는 단계,경계 영역에서 상기 제1기지국에 접속한 제1단말의 자원 할당 요청을 수신하는 단계,상기 경계 영역에서 음성 서비스를 이용하는 제2단말이 있는지 확인하는 단계, 그리고상기 제2단말이 있으면, 상기 제2단말에 할당된 자원을 기초로 상기 제1단말의 자원을 할당하는 단계를 포함하고,상기 경계 영역은 상기 제1기지국과 상기 제2기지국의 셀이 겹치는 영역인 자원할당방법.
- 제1항에서,상기 제2단말은 상기 경계 영역에서 상기 제2기지국에 접속하여 음성 서비스를 이용하는 단말인 자원할당방법.
- 제2항에서,상기 제2단말에 할당된 자원은 자원 할당 위치와 전송 방식이 고정되어 일정 주기로 할당된 자원인 자원할당방법.
- 제1항에서,상기 제1단말의 자원을 할당하는 단계는 상기 제2단말에 할당된 자원을 피해 상기 제1단말의 자원을 할당하는 자원할당방법.
- 제1항에서,상기 제1단말의 자원을 할당하는 단계는상기 제2단말에 할당된 자원과 다른 위치는 제1레벨의 변조 및 코딩 방식으로 상기 제1단말의 자원을 할당하고, 상기 제2단말에 할당된 자원과 같은 위치는 상기 제1레벨보다 낮은 제2레벨의 변조 및 코딩 방식으로 상기 제1단말의 자원을 할당하며, 상기 제2레벨의 변조 및 코딩 방식은 상기 제1레벨의 변조 및 코딩 방식보다 적은 데이터를 보내는 방식인 자원할당방법.
- 자원할당장치가 자원을 할당하는 방법으로서,제1단말의 음성 서비스를 위한 자원 할당 요청을 수신하는 단계,상기 제1단말에 자원 할당 위치와 전송 방식이 고정된 제1자원을 할당하는 단계,상기 제1단말과 인접해 있는 제2단말의 자원 할당 요청을 수신하는 단계, 그리고상기 제2단말에 상기 제1자원과 다른 제2자원을 할당하는 단계를 포함하고,상기 제1단말과 상기 제2단말은 서로 다른 기지국에 접속한 단말인 자원할당방법.
- 제6항에서,상기 제1단말과 상기 제2단말이 접속한 기지국을 포함하는 복수 기지국의 자원 정보를 모니터링하는 단계를 더 포함하는 자원할당방법.
- 제6항에서,상기 제1단말과 상기 제2단말 각각은 상기 제1단말이 접속한 제1기지국과 상기 제2단말이 접속한 제2기지국의 셀이 겹치는 경계 영역에 있는 단말인 자원할당방법.
- 제6항에서,상기 제1자원을 할당하는 단계는음성 서비스를 위한 자원 위치를 특정 서브프레임으로 고정하는 단계, 그리고상기 특정 서브프레임에 상기 제1단말의 음성 서비스를 위한 상기 제1자원을 할당하는 단계를 포함하고,상기 특정 서브프레임은 일정 주기로 반복되는 서브프레임인 자원할당방법.
- 제9항에서,상기 제2자원을 할당하는 단계는상기 특정 서브프레임을 피해서 상기 제2단말의 데이터 서비스를 위한 상기 제2자원을 할당하는 자원할당방법.
- 제9항에서,제3단말의 음성 서비스를 위한 자원 할당 요청을 수신하는 단계, 그리고상기 특정 서브프레임에 상기 제3단말의 음성 서비스를 위한 제3자원을 할당하는 단계를 더 포함하는 자원할당방법.
- 자원할당장치가 자원을 할당하는 방법으로서,제1기지국과 제2기지국을 포함하는 복수 기지국의 자원 정보를 모니터링하는 단계,상기 제1기지국과 상기 제2기지국의 셀이 겹치는 경계 영역에 있는 단말의 자원 할당 요청을 수신하는 단계,상기 제1기지국과 상기 제2기지국 각각의 자원이 여유가 있는지 판단하는 단계, 그리고상기 제1기지국과 상기 제2기지국 각각의 자원이 여유가 있으면, 상기 제1기지국과 상기 제2기지국이 상기 단말에 동일한 음성 서비스를 제공하도록 상기 제1기지국과 상기 제2기지국에 동일한 자원을 할당하는 단계를 포함하는 자원할당방법.
- 제12항에서,상기 단말은 상기 경계 영역에서 음성 서비스를 이용하는 단말인 자원할당방법.
- 제12항에서,상기 제1기지국과 상기 제2기지국에 동일한 자원을 할당하는 단계는자원 할당 위치와 전송 방식이 동일한 자원을 할당하는 자원할당방법.
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KR101451420B1 (ko) | 2014-10-16 |
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