WO2012057513A2 - 다중 노드 시스템에서 신호 전송 방법 및 장치 - Google Patents
다중 노드 시스템에서 신호 전송 방법 및 장치 Download PDFInfo
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- WO2012057513A2 WO2012057513A2 PCT/KR2011/008012 KR2011008012W WO2012057513A2 WO 2012057513 A2 WO2012057513 A2 WO 2012057513A2 KR 2011008012 W KR2011008012 W KR 2011008012W WO 2012057513 A2 WO2012057513 A2 WO 2012057513A2
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- node
- terminal
- configuration information
- nodes
- node configuration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
- H04W8/245—Transfer of terminal data from a network towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/068—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using space frequency diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
Definitions
- the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting a signal in a multi-node system.
- the node may mean an antenna or a group of antennas separated by a predetermined interval from a distributed antenna system (DAS), but may be used in a broader sense without being limited thereto. That is, the node may be a picocell base station (PeNB), a home base station (HeNB), a remote radio head (RRH), a remote radio unit (RRU), a repeater, a distributed antenna (group), or the like.
- DAS distributed antenna system
- the node may be a picocell base station (PeNB), a home base station (HeNB), a remote radio head (RRH), a remote radio unit (RRU), a repeater, a distributed antenna (group), or the like.
- Wireless communication systems with high density nodes can exhibit higher system performance by cooperation between nodes.
- each node operates as an antenna or a group of antennas for one cell because each node is managed by a control station and transmits / receives to each other, it can achieve much better system performance.
- a wireless communication system including a plurality of nodes is called a multi-node system.
- the channel state between each node and the terminal may be significantly different as each node is distributedly arranged or according to transmission power of each node, presence or absence of an obstacle, and the like.
- eight nodes may be distributed at regular intervals. At this time, only four nodes may represent a channel state of a specific value or more according to the position of the terminal, and the remaining four nodes may represent a channel state of less than the specific value.
- the present invention provides a signal transmission method and apparatus in a multi-node system.
- a signal transmission method of a multi-node system including a plurality of nodes and a base station capable of being connected to and controlling each of the plurality of nodes may include transmitting first node configuration information to a first terminal. step; Transmitting second node configuration information to a second terminal; Transmitting a signal to the first terminal through a first node group; And transmitting a signal to the second terminal through a second node group, wherein the first node configuration information and the second node configuration information include system parameters set differently according to the terminal.
- the node group is determined based on the first node configuration information
- the second node group is determined based on the second node configuration information.
- the first node group and the second node group may use the same cell ID.
- the first node configuration information may include at least one field among fields that indicate the number of nodes, the number of transmission antennas for each node, the transmission power for each node, and mapping information between the node and the reference signal applied to the first terminal. Can be.
- the second node configuration information may include at least one of the fields indicating the number of nodes, the number of transmission antennas for each node, the transmission power for each node, and mapping information between the node and the reference signal applied to the second terminal. Can be.
- the first terminal and the second terminal has a different group ID or class ID, and the class ID is set differently according to a quality of service required by the first terminal and the second terminal. Can be.
- the first node configuration information and the second node configuration information may be masked and transmitted with a terminal group ID or class ID of the first terminal and the second terminal.
- a signal transmission method of a multi-node system including a plurality of nodes and a base station capable of being connected to and controlling each of the plurality of nodes may include common node configuration information for a first terminal and a second terminal. Transmitting; Transmitting a signal to the first terminal and the second terminal through a common node indicated by the common node configuration information; Transmitting first additional node configuration information to the first terminal; And transmitting a signal to the first terminal through the additional node indicated by the common node and the first additional node configuration information.
- the common node may be a node that transmits signals necessary for cell entry or cell reentry of the first terminal and the second terminal.
- the common node may be nodes of some of the plurality of nodes.
- the first additional node configuration information may include a bitmap indicating a node added to the first terminal among the plurality of nodes.
- the common node configuration information may be transmitted through a broadcast channel.
- the first additional node configuration information may be unicast to the first terminal.
- the first terminal and the second terminal has a different group ID or class ID, and the class ID is set differently according to a quality of service required by the first terminal and the second terminal. Can be.
- the first additional node configuration information may be masked and transmitted by a terminal group ID or a class ID of the first terminal.
- an optimal node configuration may be applied according to a terminal group or a service required by a terminal.
- the efficiency of a multi-node system can be increased.
- FIG. 1 illustrates an example of a multi-node system.
- FIG. 2 shows a radio access structure of a conventional wireless communication system.
- FIG. 3 illustrates a wireless access structure of a wireless communication system to which a base station hotel concept is applied.
- FIG. 5 shows another example of a frame structure.
- FIG. 6 shows an example of a signal transmission method of a multi-node system.
- FIG. 7 shows another example of a signal transmission method of a multi-node system.
- FIG. 8 illustrates an example of applying the method of FIG. 6.
- FIG. 9 illustrates an example of applying the method of FIG. 7.
- FIG. 10 is a block diagram illustrating a base station and a terminal.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier-frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented in a wireless technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA).
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
- LTE-A Advanced
- IEEE 802.16m is the successor to IEEE 802.16e.
- FIG. 1 illustrates an example of a multi-node system.
- a multi-node system includes a base station (BS) and a plurality of nodes.
- a base station generally refers to a fixed station communicating with a terminal, and may be referred to as other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an advanced base station (ABS).
- eNB evolved-NodeB
- BTS base transceiver system
- ABS advanced base station
- a node is a device controlled by a base station and may communicate with a terminal.
- 1 illustrates a distributed antenna as an example of a node, and in this sense, the node is denoted as an antenna node (AN).
- the node is not limited to a distributed antenna, and is implemented by, for example, a macro base station antenna, a picocell base station (PeNB), a home base station (HeNB), a remote radio head (RRH), a remote radio unit (RRU), a repeater, or the like. Can be.
- Nodes are also called points.
- the node may be identified or indicated through a reference signal (RS) or a pilot signal from a terminal point of view.
- the reference signal (or pilot signal) is a signal known to the transmitter and the receiver, and means a signal used for channel measurement, data demodulation, and the like.
- a reference signal for example, there is a channel status indication-reference signal (CSI-RS) defined in 3GPP LTE-A.
- CSI-RS channel status indication-reference signal
- 3GPP LTE-A 3GPP LTE-A.
- one CSI-RS configuration may be mapped to one node.
- the terminal may identify or receive a node based on the CSI-RS according to the CSI-RS configuration, and may obtain channel state information on the corresponding node.
- the term 'node' includes not only physical nodes but also logical nodes.
- the logical node refers to a node from the standpoint recognized by the terminal.
- the physical node and the logical node may have a 1: 1 relationship, but are not limited thereto. For example, if a plurality of physical nodes share one reference signal (pilot) pattern, a plurality of physical nodes sharing this one reference signal (pilot) pattern may correspond to one logical node.
- one channel status information reference signal (CSI-RS) pattern is defined for one, two, four, or eight transmit antenna ports.
- one CSI-RS pattern is transmitted from one physical node.
- two physical nodes each having four transmission antennas transmit one CSI-RS pattern defined for eight antenna ports, the UE recognizes that the two physical nodes are one logical node.
- nodes are distinguished by reference signals (pilots) having different configurations from a terminal point of view.
- reference signals pilots
- a logical node viewed from the terminal's point of view may be divided into CSI-RSs having different configurations.
- an antenna node is connected to a base station by wire / wireless, and each antenna node may be configured of one antenna or an antenna group (ie, a plurality of antennas). Antennas belonging to one antenna node may be located within a few meters geographically and have the same characteristics. In a multi-node system, the antenna node serves as an access point (AP) to which a terminal can access.
- AP access point
- a distributed antenna system refers to a system in which antennas (ie, nodes) are distributed and arranged in geographically diverse locations and the base stations manage these antennas.
- the distributed antenna system is different from that in the conventional centralized antenna system (CAS), antennas of a base station are concentrated and arranged in a cell center.
- CAS conventional centralized antenna system
- the geographically distributed antennas may mean that when one receiver receives the same signal from a plurality of antennas, a channel state difference between each antenna and the receiver is arranged to be different by a specific value or more. Meaning that the antennas are concentrated may mean that the antennas are densely arranged such that the channel state difference between each antenna and one receiver is less than a specific value.
- the specific value may be variously determined according to a frequency, a service type, etc. used for the antennas.
- FIG. 2 shows a radio access structure of a conventional wireless communication system.
- a conventional wireless communication system may be a cellular system.
- a base station is responsible for three sectors constituting a cell (for example, 201, 202, and 203), and each base station is controlled by a base station controller / wireless network controller through a backbone network 204.
- BSC radio network controller
- each base station is generally disposed in a cell having jurisdiction.
- FIG. 3 illustrates a wireless access structure of a wireless communication system to which a base station hotel concept is applied.
- each base station may be connected through an antenna node and an optical fiber distributed in cells, and each base station (BTS) may be collected in a specific area without being disposed in the cell under its control. Is installed.
- a base station hotel Such a plurality of base stations that manage the distributed cells are collected and arranged and managed in a specific area is called a base station hotel (BTS hotel).
- BTS hotel base station hotel
- the base station hotel concept it is possible to reduce costs for land, buildings, etc. for installing the base station, and to reduce maintenance, maintenance, and repair costs.
- the base station and the BSC / RNC can be installed in one place to increase the backhaul capacity (backhaul capacity).
- This base station hotel concept can be applied to a distributed antenna system.
- a radio frame consists of 10 subframes, and one subframe consists of two slots.
- the time taken for one subframe to be transmitted is called a transmission time interval (TTI).
- TTI transmission time interval
- one subframe may have a length of 1 ms
- one slot may have a length of 0.5 ms.
- One slot may include a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain.
- the OFDM symbol is for representing one symbol period and may be called a different name according to a multiple access scheme.
- SC-FDMA orthogonal frequency division multiplexing
- One slot includes 7 OFDM symbols as an example, but the number of OFDM symbols included in one slot may vary according to the length of a cyclic prefix (CP).
- One subframe includes 7 OFDM symbols in a normal CP and one subframe includes 6 OFDM symbols in an extended CP.
- the structure of the radio frame is only an example, and the number of subframes included in the radio frame and the number of slots included in the subframe may be variously changed.
- the primary synchronization signal is transmitted in the last OFDM symbol of the first slot and eleventh slot included in the radio frame.
- PSS is used to obtain OFDM symbol synchronization or slot synchronization and is associated with a physical cell identity.
- Primary Synchronization Code is a sequence used for PSS, and 3GPP LTE has three PSCs and transmits one of three PSCs to the PSS according to a cell ID. The same PSC is used for each of the last OFDM symbols of the first slot and the eleventh slot.
- the secondary synchronization signal includes a first SSS and a second SSS.
- the first SSS and the second SSS are transmitted in an OFDM symbol adjacent to the OFDM symbol in which the PSS is transmitted.
- SSS is used to obtain frame synchronization.
- the SSS is used to obtain a cell ID along with the PSS.
- the first SSS and the second SSS use different Secondary Synchronization Codes (SSCs).
- SSCs Secondary Synchronization Codes
- the Physical Broadcast Channel (PBCH) is transmitted in the preceding four OFDM symbols of the second slot of the first subframe of the radio frame.
- the PBCH carries system information necessary for the terminal to communicate with the base station, and the system information transmitted through the PBCH is called a master information block (MIB).
- MIB master information block
- FIG. 5 shows another example of a frame structure.
- a superframe includes a superframe header (SFH) and four frames (frames, F0, F1, F2, and F3).
- Each frame in the superframe may have the same length.
- the size of each superframe is 20ms and the size of each frame is illustrated as 5ms, but is not limited thereto.
- the length of the superframe, the number of frames included in the superframe, the number of subframes included in the frame, and the like may be variously changed.
- the frame may include a plurality of subframes. The number of subframes included in the frame may be variously changed according to a channel bandwidth and a length of a cyclic prefix (CP).
- CP cyclic prefix
- the superframe header may carry essential system parameters and system configuration information.
- the superframe header may be located in the first subframe in the superframe.
- the superframe header may be classified into primary SFH (P-SFH) and secondary SFH (S-SFH; secondary-SFH).
- P-SFH and S-SFH may be transmitted every superframe.
- One frame includes a plurality of subframes (subframe, SF0, SF1, SF2, SF3, SF4, SF5, SF6, SF7). Each subframe may be used for uplink or downlink transmission.
- One subframe includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain and a plurality of subcarriers in the frequency domain.
- OFDM orthogonal frequency division multiplexing
- the subframe may be composed of 5, 6, 7, or 9 OFDM symbols, but this is only an example and the number of OFDM symbols included in the subframe is not limited.
- the number of OFDM symbols included in the subframe may be variously changed according to the channel bandwidth and the length of the CP.
- FIG. 6 shows an example of a signal transmission method of a multi-node system.
- a base station controls a plurality of nodes arranged in a cell
- terminal n and terminal m may be terminals arranged in a cell in which the base station provides a service. Therefore, the terminal uses the same cell ID.
- the terminal n and the terminal m may be included in different terminal groups or may be included in different classes.
- the terminal When a terminal is included in a specific terminal group, the terminal may be given a terminal group ID.
- the terminal when the terminal is included in a specific class, the terminal may be given a class ID. Classes may be classified according to a data rate required by the terminal, a quality of service (QoS), a rate plan, and a transmission standard (eg, LTE / LTE-A, IEEE 802.16e / IEEE 802.16m).
- the base station transmits first node configuration information to terminal n (S101), and transmits second node configuration information to terminal m (S102). That is, the base station transmits node configuration information corresponding to each terminal.
- the node configuration information includes information on system configuration.
- a field included in the node configuration information includes: 1. total number of nodes in a cell, 2. number of transmit antennas of each node, and 3. information of each node. Transmit power, 4. reference signal configuration and mapping information between nodes, and the like.
- the node setting information transmitted to different terminals may have different values of the field. For example, a field value indicating the total number of nodes in the cell included in the first node configuration information and a field value indicating the total number of nodes in the cell included in the second node configuration information may be set differently. Other field values can be set differently as well.
- the same system parameter is transmitted to all the terminals in the cell, and as a result, all the terminals in the cell commonly recognize the transmission antenna setting in the cell.
- different system parameters can be transmitted for each terminal in a cell through node configuration information. As a result, different transmission antenna settings in a cell can be recognized for each terminal.
- the first node configuration information and the second node configuration information may be transmitted through a broadcast channel such as PBCH and SFH.
- the first node configuration information and the second node configuration information may be included in an upper layer signal transmitted through a data channel such as a physical downlink shared channel (PDSCH), for example, a radio resource control (RRC) message. That is, the node configuration information may be transmitted in a broadcast message or may be transmitted in a multicast or unicast message.
- PDSCH physical downlink shared channel
- RRC radio resource control
- Node configuration information may be transmitted periodically or aperiodically.
- the first node configuration information may be masked and transmitted to the group ID of the terminal group to which the terminal n belongs.
- the second node configuration information may be masked and transmitted with the group ID of the terminal group to which the terminal m belongs.
- the terminal n decodes the first node configuration information by using the group ID to which the terminal n belongs (S103). That is, the terminal n may demask the first node configuration information by the group ID to which the terminal n belongs and decode the first node configuration information.
- the terminal m decodes the second node configuration information by using the group ID to which the terminal m belongs (S104). That is, the terminal m may demask the second node configuration information by the group ID to which the terminal m belongs and decode the second node configuration information.
- the base station masks with a group ID of a specific terminal and transmits node configuration information, and only a terminal having a specific group ID can successfully decode the corresponding node configuration information.
- the base station transmits a signal to the terminal n through the first node group (S105).
- the first node group may be nodes indicated by the first node configuration information.
- the base station transmits a signal to the terminal m through the second node group (S106).
- the second node group may be nodes indicated by the second node configuration information.
- the node configuration information is masked and demasked by the group ID of the terminal
- FIG. 7 shows another example of a signal transmission method of a multi-node system.
- the base station transmits common node configuration information to terminal n and terminal m (S201 and S202).
- the common node configuration information may include system information common to all terminals in the cell. Common system information may be generated using a cell ID common to all terminals.
- the common node configuration information may include the total number of nodes in a cell, the number of transmit antennas of each node, reference signal configuration and mapping information between nodes, and the like.
- the common node setting information may be transmitted through a predetermined node (called a common node or a reference node).
- the common node may be a node that performs initial operations such as cell entry and cell re-entry of the terminal.
- the base station transmits a signal to the terminal n, the terminal m through the common nodes (S203, S204).
- the common node configuration information may be broadcast through PBCH, physical downlink shared channel (PDSCH), or SFH.
- the base station transmits the first additional node configuration information to the terminal n (S205).
- the first additional node configuration information may indicate a node that is specifically added or changed (including removal) to the terminal n according to the terminal group or class to which the terminal n belongs.
- the first additional node configuration information may be generated based on the group ID or the class ID of the terminal group to which the terminal n belongs.
- the first additional node configuration information may be delivered in the form of a higher layer message or a terminal specific triggering signal.
- Terminal n decodes the first additional node configuration information by using the class ID (S206).
- the first additional node setting information may be configured, for example, in the form of a bitmap. Assume that the total number of nodes in a cell indicated by common node configuration information is 10 (nodes # 1 to node # 10) and 6 common nodes (nodes # 1 to node # 6). In this case, the first additional node setting information may be configured as a bitmap of 10 bits, and each bit may correspond to nodes # 1 to # 10 in turn. The first additional node configuration information may be scrambled or masked by the class ID of the terminal n.
- the terminal n may be interpreted as a node in which a node corresponding to a bit having a bit value of '1' is added to the terminal n in a bitmap descrambled or demasked by a class ID. For example, when a bitmap of '0000001010' is decoded, the terminal may interpret that the node # 7 and the node # 9 are added. That is, node # 7 and node # 9 are additional nodes.
- the base station transmits a signal to the terminal n through the common node and the additional node (S207).
- the additional node may be at least one node indicated by the first additional node configuration information.
- terminal n is a terminal according to a higher plan than other terminals in a cell. Then, more nodes can be allocated to the terminal n in order to provide a higher quality of service. To this end, the allocation of the additional node to the terminal n through the first additional node configuration information.
- FIG. 8 illustrates an example of applying the method of FIG. 6.
- the terminal 1 moves at a high speed in a specific path within a service area of a base station.
- the terminal 1 may be a terminal that moves at high speed along a highway or a railway.
- Such a terminal preferably recognizes that only nodes located around a specific path exist in the service area of the base station. Therefore, in the example of FIG. 8, the base station is configured to give the terminal 1 as the total number of nodes in the cell, 4, 2. the number of transmit antennas of each of the 4 nodes, 3. the transmit power of each of the 4 nodes, and 4. the reference signal configuration. Mapping information between four nodes may be provided.
- the base station In the service area of the base station, there may be a terminal moving at a low speed. For example, there may be a terminal of a user walking in the city.
- the base station has five nodes (five nodes except four nodes around the specific path) as the total number of nodes in the cell, the number of transmit antennas for the five nodes, transmission power, and mapping with reference signal configuration. Information and the like.
- FIG. 9 illustrates an example of applying the method of FIG. 7.
- different numbers of nodes may be allocated to terminals in a service area of a base station according to a class.
- the LTE-A terminal may be of class 1
- the LTE terminal may be of class 2.
- the class of the terminal may be divided according to data requirements, plans, and the like.
- the base station when each terminal in the service area has a different class, the base station provides some services such as cell entry, cell reentry, etc. of the terminal through the common node 902 regardless of the class of the terminal, but to a terminal having a specific class.
- an additional node 901 may be allocated and supported.
- the service may be provided through a total of ten nodes, and the LTE terminal may be provided through only six common nodes.
- the class of the terminal may be changed, or the node allocated to the terminal by the request may be changed.
- FIG. 10 is a block diagram illustrating a base station and a terminal.
- the base station 100 includes a processor 110, a memory 120, and an RF unit 130.
- the processor 110 implements the proposed functions, processes and / or methods.
- the processor 110 may be connected to and control a plurality of nodes distributed in a multi-node system.
- the processor 110 transmits node configuration information to the terminal and transmits a signal through a node group indicated by the node configuration information.
- the node configuration information may include system parameters set differently for each terminal.
- the processor 110 may allocate and support additional nodes to the terminal through additional node configuration information.
- the memory 120 is connected to the processor 110 and stores various information for driving the processor 110.
- the RF unit 130 is connected to the processor 110 and transmits and / or receives a radio signal.
- the terminal 200 includes a processor 210, a memory 220, and an RF unit 230.
- the processor 210 implements the proposed functions, processes and / or methods. For example, the processor 210 receives node configuration information and additional node configuration information from the base station, demasks and decodes the group ID or class ID to which the terminal belongs, and receives a signal through the indicated node accordingly. do.
- the memory 220 is connected to the processor 210 and stores various information for driving the processor 210.
- the RF unit 230 is connected to the processor 210 to transmit and / or receive a radio signal.
- Processors 110 and 210 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, data processing devices, and / or converters for interconverting baseband signals and wireless signals.
- the memory 120, 220 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium, and / or other storage device.
- the RF unit 130 and 230 may include one or more antennas for transmitting and / or receiving a radio signal.
- the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
- the module may be stored in the memories 120 and 220 and executed by the processors 110 and 210.
- the memories 120 and 220 may be inside or outside the processors 110 and 210, and may be connected to the processors 110 and 210 by various well-known means.
- the invention can be implemented in hardware, software or a combination thereof.
- an application specific integrated circuit ASIC
- DSP digital signal processing
- PLD programmable logic device
- FPGA field programmable gate array
- the module may be implemented as a module that performs the above-described function.
- the software may be stored in a memory unit and executed by a processor.
- the memory unit or processor may employ various means well known to those skilled in the art.
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Claims (14)
- 복수의 노드들과 상기 복수의 노드들 각각과 연결되어 제어할 수 있는 기지국을 포함하는 다중 노드 시스템의 신호 전송 방법에 있어서,
제1 단말에게 제1 노드 설정 정보를 전송하는 단계;
제2 단말에게 제2 노드 설정 정보를 전송하는 단계;
상기 제1 단말에게 제1 노드 그룹을 통해 신호를 전송하는 단계; 및
상기 제2 단말에게 제2 노드 그룹을 통해 신호를 전송하는 단계를 포함하되,
상기 제1 노드 설정 정보 및 상기 제2 노드 설정 정보는 단말에 따라 서로 다르게 설정된 시스템 파라미터를 포함하고,
상기 제1 노드 그룹은 상기 제1노드 설정 정보에 기반하여 결정되고, 상기 제2 노드 그룹은 상기 제2 노드 설정 정보에 기반하여 결정되는 것을 특징으로 하는 방법. - 제 1항에 있어서,
상기 제 1노드 그룹과 상기 제 2 노드 그룹은 동일한 셀 ID를 사용하는 것을 특징으로 하는 방법. - 제 1 항에 있어서,
상기 제1 노드 설정 정보는 상기 제1 단말에게 적용되는,
노드의 개수, 노드 별 전송 안테나 개수, 노드 별 전송 전력 및 노드와 참조 신호간의 맵핑 정보를 지시하는 필드들 중 적어도 하나의 필드를 포함하는 것을 특징으로 하는 방법. - 제 1 항에 있어서,
상기 제2 노드 설정 정보는 상기 제2 단말에게 적용되는,
노드의 개수, 노드 별 전송 안테나 개수, 노드 별 전송 전력 및 노드와 참조 신호간의 맵핑 정보를 지시하는 필드들 중 적어도 하나의 필드를 포함하는 것을 특징으로 하는 방법. - 제 1 항에 있어서, 상기 제1 단말 및 상기 제2 단말은 서로 다른 그룹 ID(identification) 또는 클래스 ID를 가지며, 상기 클래스 ID는 상기 제1 단말 및 상기 제2 단말이 요구하는 서비스 품질(quality of service)에 따라 다르게 설정되는 것을 특징으로 하는 방법.
- 제 5 항에 있어서, 상기 제1 노드 설정 정보 및 상기 제2 노드 설정 정보는 상기 제1 단말 및 상기 제2 단말의 단말 그룹 ID또는 클래스 ID로 매스킹(masking)되어 전송되는 것을 특징으로 하는 방법.
- 복수의 노드들과 상기 복수의 노드들 각각과 연결되어 제어할 수 있는 기지국을 포함하는 다중 노드 시스템의 신호 전송 방법에 있어서,
제1 단말 및 제2 단말에게 공통 노드 설정 정보를 전송하는 단계;
상기 제1 단말 및 상기 제2 단말에게 상기 공통 노드 설정 정보에 의해 지시되는 공통 노드를 통해 신호를 전송하는 단계;
상기 제1 단말에게 제1 추가 노드 설정 정보를 전송하는 단계;
상기 제1 단말에게 상기 공통 노드 및 상기 제1 추가 노드 설정 정보에 의해 지시되는 추가 노드를 통해 신호를 전송하는 단계를 포함하는 것을 특징으로 하는 방법. - 제 7 항에 있어서, 상기 공통 노드는 상기 제1 단말 및 상기 제2 단말의 셀 진입 또는 셀 재진입에 필요한 신호를 전송하는 노드인 것을 특징으로 하는 방법.
- 제 8 항에 있어서, 상기 공통 노드는 상기 복수의 노드들 중 일부의 노드들인 것을 특징으로 하는 방법.
- 제 7 항에 있어서, 상기 제1 추가 노드 설정 정보는 상기 복수의 노드들 중 상기 제1 단말에게 추가되는 노드를 지시하는 비트맵을 포함하는 것을 특징으로 하는 방법.
- 제 7 항에 있어서, 상기 공통 노드 설정 정보는 브로드캐스트(broadcast) 채널을 통해 전송되는 것을 특징으로 하는 방법.
- 제 7 항에 있어서, 상기 제1 추가 노드 설정 정보는 상기 제1 단말에게 유니캐스트(unicast)되는 것을 특징으로 하는 방법.
- 제 7 항에 있어서, 상기 제1 단말 및 상기 제2 단말은 서로 다른 그룹 ID(identification) 또는 클래스 ID를 가지며, 상기 클래스 ID는 상기 제1 단말 및 상기 제2 단말이 요구하는 서비스 품질(quality of service)에 따라 다르게 설정되는 것을 특징으로 하는 방법.
- 제 13 항에 있어서,
상기 제1 추가 노드 설정 정보는 상기 제1 단말의 단말 그룹 ID또는 클래스 ID로 매스킹(masking)되어 전송되는 것을 특징으로 하는 방법.
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KR1020137009828A KR101467713B1 (ko) | 2010-10-27 | 2011-10-26 | 다중 노드 시스템에서 신호 전송 방법 및 장치 |
US13/882,122 US9154943B2 (en) | 2010-10-27 | 2011-10-26 | Method and apparatus for transmitting a signal in a multi-node system |
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KR101472100B1 (ko) * | 2010-12-22 | 2014-12-11 | 주식회사 케이티 | 무선통신 시스템에서 기지국 장비 및 데이터 처리 방법 |
US9125135B2 (en) * | 2011-05-09 | 2015-09-01 | Telefonaktiebolaget L M Ericsson (Publ) | Independent configuration identities in a heterogeneous cellular communication network |
US9312941B2 (en) * | 2011-10-14 | 2016-04-12 | Qualcomm Incorporated | Base stations and methods for facilitating dynamic simulcasting and de-simulcasting in a distributed antenna system |
US9276685B2 (en) | 2011-10-14 | 2016-03-01 | Qualcomm Incorporated | Distributed antenna systems and methods of wireless communications for facilitating simulcasting and de-simulcasting of downlink transmissions |
US8638724B1 (en) * | 2012-06-01 | 2014-01-28 | Sprint Communications Company L.P. | Machine-to-machine traffic indicator |
DE102013107843A1 (de) | 2012-07-23 | 2014-01-23 | Electronics And Telecommunications Research Institute | Sozialkontaktinformationen-Managementvorrichtung für gemeinsame Nutzung von privaten Inhalten und Vorrichtung und Verfahren zur gemeinsamen Nutzung von privaten Inhalten |
JP6571072B2 (ja) * | 2013-10-11 | 2019-09-04 | エルジー エレクトロニクス インコーポレイティド | クラウドran環境でrrhの電源を制御する方法 |
WO2015060562A1 (ko) * | 2013-10-24 | 2015-04-30 | 엘지전자 주식회사 | 클라우드 랜 환경에서 rrh를 통한 하향링크 전송 전력을 설정하는 방법 |
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US6496505B2 (en) * | 1998-12-11 | 2002-12-17 | Lucent Technologies Inc. | Packet tunneling optimization to wireless devices accessing packet-based wired networks |
US7903593B2 (en) * | 2001-08-23 | 2011-03-08 | Runcom Technologies Ltd. | Multicast transmission in packet based cellular networks |
US7391719B2 (en) * | 2002-07-15 | 2008-06-24 | Sixnet, Llc | Redundant network interface for ethernet devices |
US7539161B2 (en) * | 2003-10-20 | 2009-05-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Virtual cell network |
WO2009011047A1 (ja) * | 2007-07-18 | 2009-01-22 | Fujitsu Limited | 基地局、装置、および移動機 |
US8289883B2 (en) * | 2007-12-21 | 2012-10-16 | Samsung Electronics Co., Ltd. | Hybrid multicast routing protocol for wireless mesh networks |
US8488634B2 (en) * | 2008-07-07 | 2013-07-16 | Apple Inc. | Use of first and second preambles in wireless communication signals |
US8831608B2 (en) * | 2010-10-25 | 2014-09-09 | Acer Incorporated | Apparatuses, systems, and methods for inbound handover enhancement |
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WO2012057513A3 (ko) | 2012-06-21 |
US20130223350A1 (en) | 2013-08-29 |
KR20130066686A (ko) | 2013-06-20 |
US9154943B2 (en) | 2015-10-06 |
KR101467713B1 (ko) | 2014-12-01 |
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