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WO2009067842A1 - Système de transmission sens descendant et procédé d'emprunt de ressources spectrales et de ressources de canal à partir de cellules adjacentes - Google Patents

Système de transmission sens descendant et procédé d'emprunt de ressources spectrales et de ressources de canal à partir de cellules adjacentes Download PDF

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Publication number
WO2009067842A1
WO2009067842A1 PCT/CN2007/003346 CN2007003346W WO2009067842A1 WO 2009067842 A1 WO2009067842 A1 WO 2009067842A1 CN 2007003346 W CN2007003346 W CN 2007003346W WO 2009067842 A1 WO2009067842 A1 WO 2009067842A1
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Prior art keywords
terminal
cell
wireless node
neighboring cell
wireless
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PCT/CN2007/003346
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English (en)
Chinese (zh)
Inventor
Xinxi Diao
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2007/003346 priority Critical patent/WO2009067842A1/fr
Priority to CN2007800534581A priority patent/CN101690291B/zh
Priority to JP2010534340A priority patent/JP2011505088A/ja
Publication of WO2009067842A1 publication Critical patent/WO2009067842A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing

Definitions

  • the present invention relates to the field of communications, and in particular, to a downlink transmission system and method for borrowing spectrum resources and channel resources of adjacent cells, where the downlink transmission system and method are used for a transmitting system using neighboring cells.
  • the borrowed neighboring cell transmits data to the terminal of the cell in the spectrum.
  • BACKGROUND OF THE INVENTION The core problem of Inter-cell Interference Coordination (ICIC) is to coordinate the use of radio resources among multiple cells, with particular attention to the cell border requires special attention.
  • the ICIC performs spatial, temporal, and frequency channel resources and power between multiple cells to facilitate the maintenance of adjacent cells.
  • the time-frequency domain coordination technology can be divided into static, semi-static and dynamic mode time-frequency domain resource coordination.
  • the static mode is mainly determined by the inter-cell planning when performing cell planning. Coordination of resources can be modified based on changes in inter-cell load and service characteristics, but the time period for such changes is generally longer. For semi-static methods, the period of resource allocation is higher than the static mode. For dynamic coordination, resource allocation is implemented at high frequency. The dynamic mode can obtain the highest gain, but the required measurement and information reporting overhead is very large, and frequent real-time communication between multiple cells is required.
  • a basic solution to inter-cell interference is "soft frequency reuse” or “partial frequency reuse.”
  • the technology divides all subcarriers of an OFDM (Orthogonal Frequency Division Multiple Access) system into m groups, and different neighboring cells select different subcarriers as the primary subcarrier of the current cell, and other subcarriers serve as the local cell.
  • the secondary subcarriers and then set different transmit power thresholds for the primary subcarriers and the secondary subcarriers of each cell, and the transmit power threshold of the primary subcarrier is higher than the transmit power threshold of the secondary subcarrier, and the cell boundary is determined by the coverage of the primary subcarrier. .
  • the primary subcarrier is allocated from the center of the cell to the cell edge, which can cover the entire cell range; the blank area is allocated the secondary subcarrier, which covers only the interior of the cell.
  • the lower-power sub-subcarriers are mainly used to transmit data. Because the base station is relatively close to the base station, the terminal can receive the clear signal of the local cell, and because the sub-subcarrier power is small, the adjacent small area is adjacent. The interference between the two is relatively small; in the edge regions of each neighboring cell, the high-power primary carrier is used to transmit data, which is in the edge region.
  • the terminal mainly receives the primary subcarriers of different neighboring cells. Since the primary subcarriers of different neighboring cells do not overlap and are orthogonal, mutual interference is greatly reduced.
  • the patented technology related to "soft frequency multiplexing" or “partial frequency multiplexing” has the Chinese patent application No. CN200510068133 entitled “Method for coordinating inter-cell interference in power planning of OFDM mobile communication systems", entitled “Single Chinese Patent Application No. CN200610087983, the method of the uplink interference coordination in the frequency network, the base station, the terminal and the network. This approach is currently being discussed in the long-term evolution system standard for third-generation mobile communications.
  • FIG. 1 shows a schematic diagram of the method.
  • the frequency of the neighboring cell is borrowed to increase the transmission rate of the edge terminal of the cell.
  • FIG. 1 shows a schematic diagram of the method.
  • the frequency of the neighboring cell is borrowed to increase the transmission rate of the edge terminal of the cell.
  • FIG. 1 shows a schematic diagram of the method.
  • the R1 - 051059 scheme all the frequency bands are used for power reduction within the cell, but the cell edge is no longer fixed 1/3, but is adjusted according to the edge load between adjacent cells.
  • the available frequency will be less than 1/3.
  • the available frequency of the edge of the neighboring cell will exceed 1/3.
  • the method of frequency soft multiplexing used by the inter-cell edge given by the R1-051059 scheme is as follows: It is assumed that at the first moment, the edge load of the cell 1 is heavier, and the edges of the neighboring cells 2, 4, and 6 are The load is lighter, and the edge load of the 3, 5, and 7 cells is general. At this time, the 3, 5, and 7 cell edges still occupy 1/3 of the frequency band, and the 2, 4, and 6 cells save a part of the frequency to the edge of the cell 1. The user uses, at this time, the edge user of the cell 1 occupies more than 1/3 of the frequency band.
  • the edge load of cell 1 is general, and the edge load of the neighboring cells 2, 4, and 6 is heavier, and the edge load of the cells of 3, 5, and 7 is relatively light
  • the first cell edge allocates the original 1/3 available frequency band, and the 3, 5, and 7 cells save a part of the frequency for the 2, 4, and 6 cell edge users.
  • 2, 4, and 6 cell edge users are available.
  • the frequency exceeds the original 1/3 available frequency.
  • the precondition for borrowing the frequency used by the edge from other cells is: It must be adjacent to all the edges of the cell using the frequency. It can be borrowed if it is lighter. For example, in Figure 1, at the Mth moment, even if the edge loads of the cells 3 and 5 are extremely light, and the edge 7 of the cell 7 is more, at this time,
  • Fig. 1 shows only the case of the structure of seven neighboring cells, and the same problem exists for the networking mode in which the frequency reuse coefficient is 1/3.
  • the spectrum is borrowed between three neighboring cells whose working frequencies are fl, G, and ⁇ , for example, if the cell with the working frequency of fl is to borrow f2, the two f2 cells adjacent to the cell with the working frequency of fl need to have A very light load can be borrowed.
  • some or all resource blocks of frequency £2 are used for an edge terminal of a cell operating at fl, two neighboring cells of a cell operating at frequency f may be interfered. .
  • the present invention is directed to a technique for transmitting data to a terminal of a cell in a spectrum of a borrowed neighboring cell using a transmitting system of a neighboring cell.
  • a downlink transmission system that borrows neighboring cell spectrum resources and channel resources.
  • the downlink transmission system includes a plurality of adjacent or adjacent wireless nodes and at least one terminal, the plurality of wireless nodes providing services to terminals of the service areas using the same or different transmission frequency bands according to requirements of frequency reuse, and adjacent There is an overlap in the area covered by the transmitted signal of the wireless node.
  • the wireless node of the cell where the terminal is located uses its transmitting channel, part or all of the resource blocks in its transmitting frequency band, and the wireless nodes of the neighboring cells of the cell in which the terminal is located use respective transmitting channels and some or all resource blocks in the transmitting frequency band.
  • the terminal transmits the service data in a single stream mode.
  • the single-flow mode means that, in the process of transmitting service data to the terminal, the resource block of the wireless node of the cell adjacent to the cell where the wireless terminal is located and the resource block of the wireless node of the cell where the terminal is located belong to the same transmission.
  • the data of the block set.
  • the wireless node of the neighboring cell and the wireless node of the cell where the terminal is located adjust the transmission power of the specific resource block according to the channel quality indication reported by the terminal.
  • the system can use the all or resource blocks of the wireless nodes of the neighboring cells and all or part of the resource blocks of the wireless nodes of the cell in which the terminal is located to transmit the service data simultaneously or in a time-sharing manner.
  • the foregoing wireless node includes: an independent base station, a remote radio unit of the distributed base station;
  • the antenna of the wireless node includes: an antenna disposed at different sites, and a cover disposed at the same site
  • the terminal uniformly performs down-conversion and baseband processing on signals from different wireless nodes and having different frequency bands; and distinguishes data transmitted to the terminal from transmission data of the corresponding wireless node according to a linear superposition principle; and the terminal
  • the channel quality indication information reported to the network side includes channel quality indication information on the working frequency of the radio node of the cell where the terminal is located, and channel quality indication information on the working frequency of the neighboring cell wireless node.
  • the above terminal refers to a terminal located in an edge area of a cell.
  • the foregoing resource block is any one of the following: a spectrum corresponding to a specific time interval; a subcarrier group corresponding to a specific time interval in orthogonal frequency multiplexing.
  • a downlink transmission method for borrowing spectrum resources of a neighboring cell and channel resources includes the following processes: determining a set of preselected neighboring cell radio nodes that can participate in single stream transmission; and selecting one or more working radio nodes participating in single stream transmission from a set of preselected neighboring cell radio nodes Transmitting the service data that needs to be transmitted to the terminal to the single-stream transmission wireless node, where the single-stream transmission wireless node includes: one or more working wireless nodes, the wireless node of the cell where the terminal is located; the single-stream transmission wireless node is in a single-flow manner Send business data to the terminal.
  • the operation of determining the pre-selected neighboring cell radio node set is: the base station sends a detection set consisting of a set of neighboring cell identifiers to the terminal, where the probe set specifies a signal transmitted by the specific neighboring cell radio node; The measurement result of the signal specified by the set is detected; the network side determines whether the signal quality of the corresponding cell reaches the threshold according to the measurement result reported by the terminal, and uses the wireless node of the cell that reaches the threshold as the pre-selected neighboring cell wireless node that can participate in the single stream transmission.
  • the operation of selecting one or more working wireless nodes is specifically: determining, for the neighboring cell corresponding to the pre-selected neighboring cell radio node, whether there is resource remaining according to the overload indication information; and for each neighboring cell with the remaining resources, respectively Obtaining the remaining amount of resources, and obtaining the application resource borrowing amount of the neighboring cell for it; for the neighboring cell whose remaining resources after the borrowing resource is removed, the wireless node is regarded as the working wireless node.
  • the foregoing operation of transmitting the service data to the single-stream transmission wireless node comprises: allocating data in a transmission block set to the single-stream transmission wireless node in the form of I/Q two-way digital baseband
  • At least one of the foregoing technical solutions of the present invention may achieve the following beneficial effects: by using a transmitting system (transmitting channel) of a neighboring cell to transmit data to a terminal of the cell in the frequency of the borrowed neighboring cell, the related art may be overcome.
  • the existing spectrum borrowing is restricted by multiple cells.
  • the frequency space multiplexing pattern can be kept unchanged and the neighboring cell interference is controlled.
  • the area where the terminal accepts the multi-cell frequency band common service is improved, thereby increasing the transmission rate of the terminal located at the cell edge.
  • FIG. 1 is a schematic diagram of an inter-cell frequency borrowing method according to the related art
  • FIG. 2 is a schematic diagram of a downlink transmission system according to an embodiment of the present invention
  • FIG. 3 is a single-stream transmission service according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a downlink transmission method according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of an example of downlink service transmission in which a neighboring cell spectrum is borrowed between internal nodes of a distributed base station according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, in view of the problem that the transmission system using the own cell in the related art has a constraint on frequency borrowing when transmitting data to the terminal of the own cell in the spectrum of the borrowed neighboring cell, the present invention provides A scheme in which a transmitting system (transmitting channel) of a neighboring cell transmits data to a terminal of a local cell on a frequency error of a borrowed neighboring cell, in other words, in the technical solution provided by the present invention, the cell not only borrows a neighboring cell The spectrum resources also borrow the transmission channel of the neighboring cell.
  • the frequency resource borrowing method may be different.
  • the wireless terminal and the wireless terminal of the neighboring cell share the same by using joint frequency hopping on a common frequency band covering the spectrum resources of different cell edges.
  • Cell edge spectrum resource of the cell mainly refers to a terminal located at the edge of the cell, but is not limited thereto, and the resource block mentioned in the present invention may be but not limited to any one of the following: 1) corresponding to a specific one The spectrum within the time interval; 2) the subcarrier group corresponding to a specific time interval in the orthogonal frequency multiplexing.
  • Embodiment 1 According to an embodiment of the present invention, a downlink transmission system that borrows spectrum resources and channel resources of a neighboring cell is first provided.
  • the downlink transmission system can also be referred to as a downlink single stream transmission system.
  • FIG. 2 is a schematic diagram of borrowing a neighbor cell spectrum resource and a channel resource downlink transmission system according to an embodiment of the present invention.
  • the downlink transmission system includes a plurality of adjacent or adjacent wireless nodes (seven wireless nodes 201a-201g are shown in FIG. 2) and at least one terminal (shown in FIG. 2 at the wireless node 201a).
  • a user equipment (UE) 202 of the cell in which the neighboring wireless nodes provide services to terminals of the service area using the same or different transmission frequency bands according to the requirements of frequency multiplexing, and the transmitting of the adjacent wireless nodes There is overlap in the area covered by the signal.
  • 203 represents a traffic channel of the terminal, which is composed of a resource block (SRB) of the serving cell and resource blocks (BRB1 ⁇ BRBn) of other cells borrowed.
  • the requirement of frequency reuse to provide services to terminals of its service area using the same or different transmission frequency bands means: 1) For the internal terminal of the cell covered by the wireless node, the wireless node uses the multiplexing factor 1 between its adjacent cell Realizing frequency reuse, in which case each wireless node can use the same spectrum to serve its internal terminal; 2) at the wireless node I lid edge region or the inner region, adjacent to the soil in the location it will be interference between the wireless terminals belonging to different regions of the cell edge, a method of avoiding such interference is: each cell using different spectrum in the edge region thereof. Although this method can avoid interference between edge terminals of neighboring cells, the available spectrum bandwidth of terminals in the edge region of each cell is significantly reduced.
  • the basic method for solving the problem in the present invention is: increasing the available bandwidth of the edge terminal by sharing the spectrum and the transmission channel between the neighboring cells, and the shared bandwidth can be used in the orthogonal direction of the cell edge region (mutually
  • the frequency band of the repulsion can also be performed within the available frequency band of the entire system, which depends on the actual load of each cell.
  • the wireless node of the cell where the terminal 202 is located (for example, the wireless node 201a shown in FIG. 2) uses its transmitting channel, part or all of the resource blocks in its transmitting frequency band, and the wireless nodes of the neighboring cells of the cell where the terminals are located ( For example, the wireless nodes 201b, 201g, and 201f shown in FIG. 2 use the respective transmission channels and some or all of the resource blocks (RBs) in the transmission band to jointly transmit the service data to the terminal in a single stream manner.
  • RBs resource blocks
  • the system may use the all or resource blocks of the wireless nodes of the neighboring cells and all or part of the resource blocks of the wireless nodes of the cell in which the terminal is located to transmit the service data simultaneously or in a time-sharing manner.
  • An example of a system that uses all or a resource block of a wireless node of a neighboring cell and all or part of a resource block of a wireless node of a cell in which the terminal is located to transmit service data in a time-sharing manner is: The wireless terminal hops from the vicinity Or receive data on an adjacent wireless node.
  • the single stream mode described above refers to: a resource block of a neighboring cell (for example, the wireless nodes 201b, 201g, 201f shown in FIG.
  • FIG. 3 shows a schematic diagram of transmitting service data in a single stream manner. As shown in FIG.
  • a partial resource block on a resource block SBR set of a serving cell (or a local cell, for example, a cell where the wireless node 201a is located), and a resource block set of a neighboring cell 1 (for example, a cell where the wireless node 201b is located)
  • a partial resource block BRB1 within a resource block set of a neighboring cell 2 (for example, a cell where the wireless node 201g is located) is a partial resource block BRB2 in a resource block set of the neighboring cell n, and is carried in the same transport block set.
  • the data In order to achieve flexibility, part of the resource blocks in the resource block (SRB) set of the monthly cell (SRB) set may be used in the resource block set of the neighboring cell 1 of the monthly cell: the partial resource block BRB1, the neighboring cell
  • the partial resource block BRBn in the resource block set of the neighboring cell n uses the resource blocks in one or more neighboring cells at a time to transmit data in the same transport block set.
  • resource blocks in multiple neighboring cells are simultaneously used to transmit data in the same transport block set, these resource blocks must meet the synchronization requirements of OFDM in use time:
  • the wireless node of the neighboring cell and the wireless node of the cell where the terminal is located adjust the channel quality indication (CQI) reported by the terminal respectively on the specific resource block. Transmit power.
  • the wireless node may be an independent base station (the legacy base station including radio frequency and baseband processing may also be a remote radio unit (RRU) of the distributed base station; and the wireless node
  • the antennas may be antennas arranged at different sites, or antennas covering different regions (sectors) arranged at the same site.
  • the receiving channel, the transmitting channel, and the baseband processing unit are included.
  • the bandwidth of the receiving channel covers the cell in which the terminal is located (the current cell) and some or all of the working frequency bands of the neighboring cell, and can receive signals from the local cell and the neighboring cell at the same time; the bandwidth of the transmitting channel covers the cell where the terminal is located and the neighboring cell. Part or all operating bands of the cell.
  • the terminal may perform downlink down conversion and baseband processing on signals from different wireless nodes and having different frequency bands; and transmit data transmitted to the terminal from the corresponding wireless node according to the linear superposition principle Distinguish from the data.
  • Terminal 202 can be derived from multiple A plurality of sets of transport blocks transmitted in parallel on different frequency bands are demodulated from signals transmitted by neighboring wireless nodes, and a plurality of sets of transport blocks that are preferably demodulated are combined into a data stream. Further, terminal 202 is on the network side.
  • the channel quality indication information is used, the channel quality indication information on the working spectrum of the radio node of the cell where the terminal is located is also reported, and the channel quality indication information on the working frequency of the neighboring cell wireless node is also reported.
  • Embodiment 2 is implemented according to the present invention. For example, a downlink transmission method for borrowing spectrum resources and channel resources of a neighboring cell is provided. As shown in FIG.
  • the downlink transmission method may include: processing, in step S402, determining a pre-selected neighboring cell radio that can participate in single-stream transmission a set of nodes; step S404, selecting one or more working wireless nodes participating in single-stream transmission from a set of pre-selected neighboring cell wireless nodes;
  • Step S406 the service data that needs to be transmitted to the terminal is sent to the single-stream transmission wireless node, where the single-stream transmission wireless node includes: one or more working wireless nodes and a wireless node of the local cell; Step S408, single-stream transmission wireless The node sends service data to the terminal in a single stream.
  • the base station transmits, to the terminal, a sounding set consisting of a set of neighboring cell identification symbol identifiers, wherein the sounding set specifies a signal transmitted by a specific neighboring cell wireless node, such as a pilot signal or a characteristic parameter of the synchronization signal ( For example, the frequency point, the coding mode, the measurement window, etc.); the terminal reports the measurement result of the signal specified by the detection set; the network side determines whether the signal quality of the corresponding cell reaches (including or exceeds) the threshold according to the measurement result of the terminal.
  • a sounding set consisting of a set of neighboring cell identification symbol identifiers, wherein the sounding set specifies a signal transmitted by a specific neighboring cell wireless node, such as a pilot signal or a characteristic parameter of the synchronization signal ( For example, the frequency point, the coding mode, the measurement window, etc.).
  • the terminal reports the measurement result of the signal specified by the detection set
  • the network side determines whether the signal quality of the
  • the wireless node of the cell whose signal quality reaches a wide value is regarded as a potential pre-selected neighboring cell wireless node that can participate in single-stream transmission. It is also possible to measure the received power of the reference signal for handover by measuring the local cell and the neighboring cell.
  • RSRP Reference Symbol Received Power
  • Step S404 For the neighboring cell corresponding to the pre-selected neighboring cell radio node, according to the overload indication information (Overload Indication, OI), it is determined whether there is resource remaining; for the OI indication, there is no resource remaining, that is, the neighboring cell that has been overloaded, give up For each neighboring cell with the remaining resources, the remaining amount of the resource is obtained, and the application resource borrowing amount of the neighboring cell is obtained, and the data can be obtained through the X2 interface between the base station and the base station; For a near cell that has exceeded the threshold after the application for the borrowed resource remains, the wireless node is used as the working wireless node.
  • OI overload Indication
  • the baseband unit (BBU) records the load of each cell in real time, the resource borrowing between the neighboring cells is also fully grasped.
  • the determination of the above working node can be implemented without using the X2 interface between the base stations.
  • Step S406 The operation of transmitting the service data to the single-stream transmission wireless node may be specifically as follows: respectively, the resource blocks in the same transport block set are allocated to the resource blocks of the single-stream transmission wireless node.
  • the network side determines each of the remaining wireless nodes (which may be referred to as single-stream transmission wireless nodes (including the 'j, the regional wireless node, and one or more of the working wireless nodes described above)
  • the transmission rate carried by the wireless node or the amount of transmission undertaken, the service data that needs to be transmitted to the terminal is transmitted to each single-stream transmission wireless node (or base station).
  • Step S408 The network or the BBU sequentially transmits the transport blocks addressed to the same wireless terminal.
  • the specific method of transmitting data in a set of transport blocks is: assigning data in a set of transport blocks subjected to orthogonal transform (for example, inverse Fourier transform, IFFT) to one or two digital basebands of I/Q to one or Multiples are identified as resource blocks on a single stream transmission wireless node.
  • the network or BBU controls the transmit power, ARQ mode, etc. of the spectrum used for single-stream transmission of each wireless node according to channel quality (CQI) information.
  • CQI channel quality
  • FIG. 5 is a radio access network composed of distributed base stations.
  • three RRUs as wireless nodes 201 are arranged on each site, and each RRU covers different cells.
  • RRU1 uses frequency band fl, covers cell 1;
  • RRU2 uses frequency band £2, covers cell 2;
  • RRU3 uses frequency band ⁇ , Covering cell 3.
  • a BBU control processes a total of nine RRUs on three of the above sites, between each RRU
  • R U1 501a is a control node of wireless terminal 202a through which RRU1 501a communicates with the wireless terminal
  • the control commands required to implement single stream transmission are transmitted between the wireless terminals.
  • the BBU 502 implements single-stream downlink transmission between the network and the wireless terminal by using the downlink transmission method in the foregoing embodiment.
  • the BBU 502 receives the reference signal from the RRU of the surrounding RRU reported by the wireless terminal 202a.
  • the measured quantity of symbol received power, RSRP determines RRU2 501b.
  • RRU3 501c is a potential node participating in single-stream transmission (ie, the above-mentioned pre-selected neighboring cell radio node); then, BBU 502 is located in RRU2 501b, RRU3 501c covered cell There is no such thing as a terminal using a resource (for example, OI indicates that the cell load is 0; in the case of implementing a single stream between cells within the distributed base station, the BBU stores the load of each RRU under its jurisdiction, without The external interface of the BBU is used to obtain the load status of each RRU under the jurisdiction of the BBU, and the RRU2 501b and the RRU3 501c are further determined to perform a single transmission working node to the terminal.
  • a resource for example, OI indicates that the cell load is 0; in the case of implementing a single stream between cells within the distributed base station, the BBU stores the load of each RRU under its jurisdiction, without The external interface of the BBU is used to obtain the load status of each RRU under
  • the BBU 502 can calculate the rate that the RRU2 501b and the RRU3 501c may bear. And considering the role of the power control factor to determine the transmission rate allocated between R U2 501a, RRU2 501b, and RRU3 501c; The BBU 502 uses the transmission channels and spectrum of the RRU2 501a, the R U2 501b, and the RRU3 501c (ie, the single-stream transmission working node described above), and simultaneously uses the RRU2 501a, the RRU2 501b, and the resource blocks on the RRU3 501c to transmit to the wireless terminal.

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Abstract

L'invention concerne un système de transmission sens descendant et un procédé d'emprunt de ressources spectrales et de ressources de canal de cellules adjacentes. Dans le système de transmission sens descendant, le noeud sans fil de la cellule dans laquelle se trouve le terminal utilise une partie ou la totalité des blocs de ressources dans son canal de transmission et dans sa bande de fréquences de transmission, et les cellules adjacentes de la cellule dans laquelle se trouve le terminal utilisent une partie ou la totalité des blocs de ressources dans leurs canaux de transmission et bandes de fréquences de transmission respectifs, pour transmettre des données de service au terminal, de manière conjointe, en mode flux unique. A l'aide de la présente invention, un problème d'emprunt de spectre limité par de multiples cellules caractéristique de la technique pertinente peut être surmonté, et la zone desservie par les bandes de fréquences de multiples cellules de manière conjointe et qui est acceptée par un terminal est augmentée à condition de maintenir la configuration de multiplexage d'intervalle de fréquences inchangée et l'interférence de cellules adjacentes limitée, ce qui améliore ainsi la vitesse de transmission de terminaux se situant à la bordure d'une cellule.
PCT/CN2007/003346 2007-11-27 2007-11-27 Système de transmission sens descendant et procédé d'emprunt de ressources spectrales et de ressources de canal à partir de cellules adjacentes Ceased WO2009067842A1 (fr)

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PCT/CN2007/003346 WO2009067842A1 (fr) 2007-11-27 2007-11-27 Système de transmission sens descendant et procédé d'emprunt de ressources spectrales et de ressources de canal à partir de cellules adjacentes
CN2007800534581A CN101690291B (zh) 2007-11-27 2007-11-27 借用邻小区频谱资源及通道资源的下行传输系统及方法
JP2010534340A JP2011505088A (ja) 2007-11-27 2007-11-27 隣接セルのスペクトラムリソースとチャネルリソースを借用する下りリンク伝送システム及び方法

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PCT/CN2007/003346 WO2009067842A1 (fr) 2007-11-27 2007-11-27 Système de transmission sens descendant et procédé d'emprunt de ressources spectrales et de ressources de canal à partir de cellules adjacentes

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CN102469532A (zh) * 2010-11-08 2012-05-23 天津赛乐新创通信技术有限公司 使用射频干扰解决手机频繁切换的方法
JP2013504984A (ja) * 2009-09-15 2013-02-07 クゥアルコム・インコーポレイテッド 異種ネットワークにおけるサブフレーム・インターレースのための方法および装置
JP2013516122A (ja) * 2009-12-29 2013-05-09 ゼットティーイー コーポレイション セル間干渉制御を実現する基地局及びセル間干渉制御方法
JP2013520040A (ja) * 2010-02-12 2013-05-30 アルカテル−ルーセント 中継支援セルラ・ネットワークにおけるセル間干渉調整のためのデバイスおよび方法
JP2013533709A (ja) * 2010-08-13 2013-08-22 富士通株式会社 直交周波数分割多重方式に基づく基地局及びその干渉協調方法
CN103828425A (zh) * 2013-11-18 2014-05-28 华为技术有限公司 一种自适应多速率的编码速率调整方法和设备
US8886190B2 (en) 2010-10-08 2014-11-11 Qualcomm Incorporated Method and apparatus for measuring cells in the presence of interference
US9106378B2 (en) 2009-06-10 2015-08-11 Qualcomm Incorporated Systems, apparatus and methods for communicating downlink information
US9125072B2 (en) 2010-04-13 2015-09-01 Qualcomm Incorporated Heterogeneous network (HetNet) user equipment (UE) radio resource management (RRM) measurements
US9144037B2 (en) 2009-08-11 2015-09-22 Qualcomm Incorporated Interference mitigation by puncturing transmission of interfering cells
US9226288B2 (en) 2010-04-13 2015-12-29 Qualcomm Incorporated Method and apparatus for supporting communications in a heterogeneous network
US9271167B2 (en) 2010-04-13 2016-02-23 Qualcomm Incorporated Determination of radio link failure with enhanced interference coordination and cancellation
US9277566B2 (en) 2009-09-14 2016-03-01 Qualcomm Incorporated Cross-subframe control channel design
US9392608B2 (en) 2010-04-13 2016-07-12 Qualcomm Incorporated Resource partitioning information for enhanced interference coordination

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2579660B1 (fr) * 2010-05-28 2018-01-10 Nec Corporation Procédé de spécification de ressources radio, système de communications radio, état de base radio et programme
KR101898050B1 (ko) 2012-10-15 2018-10-04 삼성전자주식회사 무선 통신시스템에서 가상셀 브레싱에 기반한 핸드오버 처리 방법 및 장치
WO2015127593A1 (fr) * 2014-02-25 2015-09-03 华为技术有限公司 Procédé de traitement de spectre de fréquences, station de base, équipement utilisateur et système
EP3782413B1 (fr) * 2018-05-02 2022-05-04 Huawei Technologies Co., Ltd. Noeud de réseau coordinateur et noeuds de réseau d'accès pour l'attribution de ressources dans un système de communication sans fil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1992962A (zh) * 2005-12-28 2007-07-04 上海原动力通信科技有限公司 基于3g系统演进网络架构的小区间干扰协调方法
CN101018220A (zh) * 2006-02-09 2007-08-15 华为技术有限公司 避免小区间出现干扰的实现方法及装置
CN101047938A (zh) * 2006-03-28 2007-10-03 华为技术有限公司 无线蜂窝网络及其中频段分配方法
CN101064685A (zh) * 2006-04-27 2007-10-31 国际商业机器公司 代理分配方法和设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6038450A (en) * 1997-09-12 2000-03-14 Lucent Technologies, Inc. Soft handover system for a multiple sub-carrier communication system and method thereof
JP4212768B2 (ja) * 2000-07-13 2009-01-21 三菱電機株式会社 無線通信システム
CN1160892C (zh) * 2000-11-23 2004-08-04 华为技术有限公司 实现码分多址通信系统中的宏分集方法
JP4719932B2 (ja) * 2001-07-10 2011-07-06 学校法人慶應義塾 送信サイトダイバーシチシステム
GB2408172B (en) * 2003-11-12 2007-11-14 Ipwireless Inc Method and apparatus for improved throughput in a communication system
KR100938091B1 (ko) * 2004-10-13 2010-01-21 삼성전자주식회사 직교주파수다중분할 이동통신시스템에서 블록 부호화기법과 순환 지연 다이버시티 기법을 사용하는 기지국송신 장치 및 방법
JP4794234B2 (ja) * 2005-08-01 2011-10-19 シャープ株式会社 セルラ移動通信システム
US7809079B2 (en) * 2006-05-02 2010-10-05 Panasonic Corporation Radio communication base station apparatus in multiple-carrier communication and radio communication method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1992962A (zh) * 2005-12-28 2007-07-04 上海原动力通信科技有限公司 基于3g系统演进网络架构的小区间干扰协调方法
CN101018220A (zh) * 2006-02-09 2007-08-15 华为技术有限公司 避免小区间出现干扰的实现方法及装置
CN101047938A (zh) * 2006-03-28 2007-10-03 华为技术有限公司 无线蜂窝网络及其中频段分配方法
CN101064685A (zh) * 2006-04-27 2007-10-31 国际商业机器公司 代理分配方法和设备

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9106378B2 (en) 2009-06-10 2015-08-11 Qualcomm Incorporated Systems, apparatus and methods for communicating downlink information
US9144037B2 (en) 2009-08-11 2015-09-22 Qualcomm Incorporated Interference mitigation by puncturing transmission of interfering cells
US11357035B2 (en) 2009-09-14 2022-06-07 Qualcomm Incorporated Cross-subframe control channel design
US9277566B2 (en) 2009-09-14 2016-03-01 Qualcomm Incorporated Cross-subframe control channel design
US9281932B2 (en) 2009-09-15 2016-03-08 Qualcomm Incorporated Methods and apparatus for subframe interlacing in heterogeneous networks
US10142984B2 (en) 2009-09-15 2018-11-27 Qualcomm Incorporated Methods and apparatus for subframe interlacing in heterogeneous networks
JP2013504984A (ja) * 2009-09-15 2013-02-07 クゥアルコム・インコーポレイテッド 異種ネットワークにおけるサブフレーム・インターレースのための方法および装置
US8942192B2 (en) 2009-09-15 2015-01-27 Qualcomm Incorporated Methods and apparatus for subframe interlacing in heterogeneous networks
US8989752B2 (en) 2009-12-29 2015-03-24 Zte Corporation Base station for implementing inter-cell interference coordination and method for inter-cell interference coordination
JP2013516122A (ja) * 2009-12-29 2013-05-09 ゼットティーイー コーポレイション セル間干渉制御を実現する基地局及びセル間干渉制御方法
JP2013520040A (ja) * 2010-02-12 2013-05-30 アルカテル−ルーセント 中継支援セルラ・ネットワークにおけるセル間干渉調整のためのデバイスおよび方法
US9107068B2 (en) 2010-02-12 2015-08-11 Alcatel Lucent Device and method for inter-cell interference coordination in relay-assistant cellular network
US9392608B2 (en) 2010-04-13 2016-07-12 Qualcomm Incorporated Resource partitioning information for enhanced interference coordination
US9125072B2 (en) 2010-04-13 2015-09-01 Qualcomm Incorporated Heterogeneous network (HetNet) user equipment (UE) radio resource management (RRM) measurements
US9226288B2 (en) 2010-04-13 2015-12-29 Qualcomm Incorporated Method and apparatus for supporting communications in a heterogeneous network
US9271167B2 (en) 2010-04-13 2016-02-23 Qualcomm Incorporated Determination of radio link failure with enhanced interference coordination and cancellation
US9282472B2 (en) 2010-04-13 2016-03-08 Qualcomm Incorporated Heterogeneous network (HETNET) user equipment (UE) radio resource management (RRM) measurements
US9801189B2 (en) 2010-04-13 2017-10-24 Qualcomm Incorporated Resource partitioning information for enhanced interference coordination
JP2013533709A (ja) * 2010-08-13 2013-08-22 富士通株式会社 直交周波数分割多重方式に基づく基地局及びその干渉協調方法
US8886190B2 (en) 2010-10-08 2014-11-11 Qualcomm Incorporated Method and apparatus for measuring cells in the presence of interference
CN102469478A (zh) * 2010-11-08 2012-05-23 天津赛乐新创通信技术有限公司 使用基带解码模块联合控制射频干扰的方法
CN102469532A (zh) * 2010-11-08 2012-05-23 天津赛乐新创通信技术有限公司 使用射频干扰解决手机频繁切换的方法
WO2015070455A1 (fr) * 2013-11-18 2015-05-21 华为技术有限公司 Dispositif et procédé de réglage du débit de codage adaptatif multidébit
CN103828425B (zh) * 2013-11-18 2017-08-18 华为技术有限公司 一种自适应多速率的编码速率调整方法和设备
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