WO2016127394A1 - Procédé et appareil de commande d'interférences, et système de communication - Google Patents

Procédé et appareil de commande d'interférences, et système de communication Download PDF

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Publication number
WO2016127394A1
WO2016127394A1 PCT/CN2015/073008 CN2015073008W WO2016127394A1 WO 2016127394 A1 WO2016127394 A1 WO 2016127394A1 CN 2015073008 W CN2015073008 W CN 2015073008W WO 2016127394 A1 WO2016127394 A1 WO 2016127394A1
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WIPO (PCT)
Prior art keywords
cell
uplink
downlink
downlink subframe
ratio
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PCT/CN2015/073008
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English (en)
Chinese (zh)
Inventor
陶茂智
董九山
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/073008 priority Critical patent/WO2016127394A1/fr
Priority to CN201580001872.2A priority patent/CN106165484B/zh
Publication of WO2016127394A1 publication Critical patent/WO2016127394A1/fr

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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]

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a communication system for controlling interference.
  • the TDD (Time Division Duplexing) mode refers to that the uplink and downlink use the same working frequency band and perform uplink and downlink at different time intervals.
  • the frame structure of the TD-LTE (Time Division-Long Term Evolution) system is as shown in FIG. 1B.
  • One radio frame has a length of 10 ms, and includes a special subframe and a regular subframe, and a total of 10 subframes, each subframe.
  • the length is 1ms.
  • the special sub-frame is divided into three time slots: DwPTS (Downlink Pilot Time Slot) (for the transmission of PSS (Primary Synchronous Signal)/PDCCH (Physical Downlink Control Channel) /PHICH (Physical HARQ indicator Channel) / PCFICH (Physical Control Format Indicator Channel) / PDSCH (Physical Downlink Shared Channel), GP ( For the protection interval between the downlink and the uplink) and the UpPTS (Uplink Pilot Time Slot) (for transmitting SRS (Sounding Reference Symbol) / PRACH (Physical Random Access Channel) Into the channel), etc.; the sum of the lengths of the three time slots DwPTS, GP, and UpPTS in the special subframe is 1 ms.
  • the conventional subframe includes an uplink subframe and a downlink subframe, where the uplink subframe is used for transmitting uplink control signaling and service data, and the downlink subframe is used for transmitting downlink control signaling and service data.
  • subframe #1 and subframe #6 can be configured in a radio frame. You can also configure a special subframe (located in subframe #1).
  • Subframe #0 and subframe #5 and the DwPTS in the special subframe are always used as the downlink transmission, and the UpPTS in the subframe #2 and the special subframe is always used for the uplink transmission, and other subframes can be configured to be used as needed. Uplink transmission or downlink transmission.
  • the uplink and downlink subframe allocation supports 7 different modes.
  • the specific configuration parameters are shown in Table 1.
  • D indicates that the subframe is used for downlink transmission
  • U indicates that the subframe is used for uplink.
  • Transmission indicates that the subframe is a special subframe, and includes three parts: DwPTS, GP, and UpPTS.
  • the configuration of the uplink and downlink subframes of the TDD can be dynamically adjusted according to the change of the proportion of the uplink and downlink services to meet the transmission requirements of the uplink and downlink services of the cell.
  • the time period is one radio frame (only one example, and may be other time periods), wherein subframes #0 and #5 are fixed as downlink subframes, and subframes #2 and #7 are fixed.
  • subframes #1 and #6 are fixed as special subframes (which can also be classified as fixed downlink subframes), and other subframes (#3, #4, #8, #9) are flexibly allocated.
  • a subframe which may be an uplink subframe for uplink transmission or a downlink subframe for downlink transmission.
  • the base station can be dynamically configured according to real-time service requirements and channel conditions to adapt to dynamic changes in service requirements.
  • interference of the cross-slot as shown in FIG. 1D may occur.
  • the first type of interference the downlink time slot transmission of the base station 110 in the same frequency mode causes interference to the uplink reception of the base station 120. If the isolation is insufficient, the base station 120 may even be blocked.
  • the second type of interference the uplink transmission of the UE (User Equipment) 140 may cause interference to the downlink reception of the UE 130.
  • the UE User Equipment
  • a cell cluster-based interference control scheme which is also called CCIM (Cell Clustering Interference Mitigatio).
  • Mitigation scheme the scheme clusters the cells, and the clusters need to have sufficient isolation, and the clusters can perform service adaptation, that is, the cells in the cluster can select the best uplink and downlink configuration according to their current business conditions, but the same
  • the uplink and downlink configurations of all cells in the cluster need to be the same.
  • the other is an interference control scheme of ULPC (Uplink Power Control), which is provided by providing a receiving base station SINR (Signal ToInterfaerece Plus Noise Ratio) and enhancing the UE's transmit power. interference.
  • SINR Signal ToInterfaerece Plus Noise Ratio
  • the prior art interference control scheme has application restrictions. For example, for the interference control between the macro cell and the micro cell, the ULPC technology is more suitable; and for the interference control between the micro cells, the CCIM technology is more suitable.
  • the prior art solutions are difficult to effectively control.
  • the interference control method of the prior art has other defects.
  • the ULPC scheme raises the noise of the neighboring area by the uplink power control algorithm, and the downlink service of other neighboring areas at the cross-slot position is affected, and new instability is introduced. State factor.
  • CCIM technology there is an inter-cluster interference problem caused by insufficient isolation between base stations.
  • the embodiments of the present invention provide a method and an apparatus for controlling interference, and a communication system, which is used to solve the interference problem of cross-slots in different uplink and downlink subframe configurations in the prior art.
  • a method for controlling interference for use in a time division duplex TDD communication system
  • the TDD communication system has a plurality of uplink and downlink subframe ratios
  • the TDD communication system includes a plurality of cells, where the multiple cells include a first cell and a second cell, and the uplink and downlink subframe ratios of the first cell
  • the uplink and downlink subframe ratio of the second cell is the second uplink and downlink subframe ratio, the first uplink and downlink subframe ratio and the second uplink and downlink subframes.
  • the frame ratio is different, and the isolation between the first cell and the second cell meets a preset condition, and the method includes:
  • the radio access device where the second cell is located determines an intersecting slot of the first cell and the second cell, where the cross slot is the same subframe number in the first radio frame and the second radio frame, And for the subframes that are transmitted in different directions, the first radio frame is a radio frame having the first uplink and downlink subframe ratio, and the second radio frame is configured to have the second uplink and downlink subframe. Ratio of radio frames;
  • the radio access device in which the second cell is located controls the second cell to stop transmitting the downlink data channel in the cross slot.
  • the preset condition is that the isolation is less than or equal to a preset isolation threshold.
  • the wireless access device where the second cell is located is controlling the second cell at the intersection Before the sending of the downlink data channel is stopped in the time slot, the method further includes:
  • the wireless access device where the second cell is located receives the indication information sent by the controller or the wireless access device where the first cell is located, and the controller is used to coordinate the multiple cells;
  • the radio access device in which the second cell is located controls the second cell to stop sending the downlink data channel in the cross slot, including:
  • the radio access device in which the second cell is located controls the second cell to stop transmitting the downlink data channel in the cross slot according to the indication information.
  • the method further includes:
  • the radio access device where the second cell is located receives the configuration information sent by the controller or the radio access device where the first cell is located, and the configuration information is used to configure the second cell as the first Cooperative cell of the cell;
  • the radio access device in which the second cell is located receives the uplink data sent by the user equipment UE in the first cell on the symbol that stops transmitting the downlink data channel in the cross-slot according to the configuration information;
  • the wireless access device where the second cell is located sends the received uplink data to the first cell.
  • a method for controlling interference for use in a time division duplex TDD communication system, the TDD communication system having a plurality of uplink and downlink subframe ratios, the communication system including a controller, and the controller is used for coordination a plurality of cells, the method comprising:
  • the controller determines, by the second cell, the second cell, the isolation between the second cell and the first cell meets a preset condition, and the uplink and downlink subframe ratio of the second cell is The second uplink and downlink subframe ratio is different, and the second uplink and downlink subframe ratio is different from the first uplink and downlink subframe ratio;
  • the controller sends indication information to the second cell, instructing the second cell to stop transmission of a downlink data channel in an inter-slot with the first cell.
  • an initial uplink and downlink subframe ratio of the multiple cells is a ratio of the second uplink and downlink subframes, and the controller determines the first cell.
  • the controller acquires uplink and downlink load information of the multiple cells
  • the controller determines, according to the uplink and downlink load information of the multiple cells, that the uplink and downlink subframe ratio is adjusted from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio As the first cell.
  • the method further includes: before the adjustment of the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, the method further includes:
  • the controller calculates a first capacity difference, where the first capacity difference is a capacity when the first cell adopts the first uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio is used.
  • the controller calculates a second capacity difference, where the second capacity difference is a capacity when the second cell adopts the first uplink and downlink subframe ratio, and uses the second uplink and downlink subframe ratio The difference between the capacities of the time;
  • the controller adjusts the uplink and downlink subframe ratio of the first cell from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, and includes: when the second capacity difference is less than 0, When the sum of the first capacity difference value and the second capacity difference value is greater than 0, the uplink and downlink subframe ratio of the first cell is adjusted from the second uplink and downlink subframe ratio to the first uplink and downlink. Subframe ratio.
  • the controller determines the second cell, including:
  • the controller determines a neighboring cell of the first cell, and selects, from a neighboring cell of the first cell, a second cell that has an isolation degree with the first cell that meets the preset condition.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold value.
  • the method further includes:
  • the controller configures the second cell to be a coordinated cell of the first cell, so that the second cell stops transmitting the symbol of the downlink data channel in the cross slot with the first cell, and receives the The uplink data sent by the user equipment UE in the first cell is sent, and the received uplink data is sent to the first cell.
  • the method further includes:
  • the controller sends the start location information to the first cell, where the start location information is used to identify a start location of the uplink data transmission of the UE, so that the first cell indicates the uplink transmission of the UE The starting position.
  • a third aspect provides a method for controlling interference, which is used in a time division duplex TDD communication system, where the TDD communication system has multiple uplink and downlink subframe ratios, and the method includes:
  • the radio access device of the first cell adjusts the uplink and downlink subframe ratio of the first cell from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, and the second uplink and downlink subframe configuration Different than the ratio of the first uplink and downlink subframes;
  • the radio access device of the first cell determines that the isolation ratio of the first cell meets a preset condition, and the uplink and downlink subframe ratio of the second cell is the second uplink and downlink sub-sub Frame ratio
  • the radio access device of the first cell sends indication information to the second cell, indicating that the second cell stops transmitting the downlink data channel in the cross slot with the first cell.
  • the radio access device of the first cell adjusts the uplink and downlink subframe ratio of the first cell from the second uplink and downlink subframe ratio to the first Before the matching of the uplink and downlink subframes, it also includes:
  • the radio access device of the first cell acquires uplink and downlink load information of the first cell
  • the radio access device of the first cell determines, according to the uplink and downlink load information of the first cell, that the uplink and downlink subframe ratio of the first cell is adjusted from the second uplink and downlink subframe ratio to The first uplink and downlink subframes are matched.
  • the radio access device of the first cell determines that the uplink and downlink subframes of the first cell need to be matched. After the ratio of the second uplink and downlink subframes is adjusted to the ratio of the first uplink and downlink subframes, the ratio of the uplink and downlink subframes of the first cell is adjusted from the ratio of the second uplink and downlink subframes to Before the first uplink and downlink subframe matching, the method further includes:
  • the radio access device of the first cell calculates a first capacity difference, where the first capacity difference is a capacity when the first cell adopts the first uplink and downlink subframe ratio, and adopts the second The difference between the capacity of the uplink and downlink subframes;
  • the wireless access device of the first cell calculates a second capacity difference, where the second capacity difference is a difference between a capacity of the second uplink and downlink subframes and a capacity when the second uplink and downlink subframes are used by the second cell;
  • the radio access device of the first cell adjusts the ratio of the uplink and downlink subframes of the first cell to the ratio of the second uplink and downlink subframes to the ratio of the first uplink and downlink subframes, including:
  • the uplink and downlink subframe ratio of the first cell is from the The ratio of the two uplink and downlink subframes is adjusted to be the ratio of the first uplink and downlink subframes.
  • the radio access device of the first cell determines the first cell
  • the second cell whose isolation meets the preset conditions includes:
  • the preset condition is that the isolation is less than or equal to a preset isolation threshold value.
  • the method further includes:
  • the wireless access device of the first cell configures the second cell to be a coordinated cell of the first cell, so that the second cell stops transmitting downlink data channels in an intersecting time slot with the first cell. Receiving uplink data sent by the user equipment UE in the first cell, and transmitting the received uplink data to the first cell.
  • the method further includes:
  • the radio access device of the first cell sends the start location information to the user equipment UE, where the start location information is used to indicate a starting location of the uplink transmission of the UE.
  • a wireless access device for use in a time division duplex TDD communication system.
  • the TDD communication system has a plurality of uplink and downlink subframe ratios, and the TDD communication system includes a plurality of cells, where the multiple cells include a first cell and a second cell, and the uplink and downlink subframe ratio of the first cell is The ratio of the uplink and downlink subframes of the second cell is the ratio of the uplink and downlink subframes of the second cell to the ratio of the second uplink and downlink subframes, and the ratio of the first uplink and downlink subframes to the second uplink and downlink subframes The ratio is different, and the isolation between the first cell and the second cell meets a preset condition, and the wireless access device includes:
  • a determining unit configured to determine an intersecting time slot of the first cell and the second cell, where the intersecting time slot has the same subframe number in the first radio frame and the second radio frame, and is used in different directions respectively a transmitted subframe, the first radio frame is a radio frame having the first uplink and downlink subframe ratio, and the second radio frame is a radio frame having the second uplink and downlink subframe ratio;
  • control unit configured to control the second cell to stop sending the downlink data channel in the cross slot.
  • the preset condition is that the isolation is less than or equal to a preset isolation threshold.
  • the wireless access device further includes a first interface unit that communicates with the controller or is connected to another wireless device.
  • the second interface unit that enters the device communication to be used for:
  • control unit When the control unit stops the sending of the downlink data channel in the cross slot by the second cell, the control unit is specifically:
  • the wireless access device further includes:
  • a first interface unit in communication with the controller or a second interface unit in communication with other wireless access devices for:
  • the configuration information is used to configure the second cell to be a coordinated cell of the first cell
  • a receiving unit configured to communicate with the user equipment UE
  • the control unit is configured to control, according to the configuration information, the receiving unit to receive uplink data sent by the UE in the first cell on a symbol that stops transmitting a downlink data channel in the cross slot, and control the The second interface unit sends the received uplink data to the first cell.
  • a controller for use in a time division duplex TDD communication system, where the TDD communication system has multiple uplink and downlink subframe ratios, the controller is used to coordinate multiple cells, and the controller includes :
  • a determining unit configured to determine, from the plurality of cells, a first cell
  • An adjusting unit configured to adjust an uplink-downlink subframe ratio of the first cell from a second uplink-downlink subframe ratio to a first uplink-downlink subframe ratio
  • the determining unit is further configured to determine, from the multiple cells, a second cell, where the isolation between the second cell and the first cell meets a preset condition, and the uplink and downlink of the second cell
  • the frame ratio is the second uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio is different from the first uplink and downlink subframe ratio;
  • an interface unit configured to send, to the second cell, indication information, to indicate that the second cell stops transmitting the downlink data channel in an intersecting time slot with the first cell.
  • an initial uplink and downlink subframe ratio of the multiple cells is a ratio of the second uplink and downlink subframes
  • the determining unit is configured to:
  • the controller further includes a computing unit, where the computing unit is configured to:
  • the first capacity difference is a capacity when the first cell adopts the first uplink and downlink subframe ratio, and a capacity when the second uplink and downlink subframe ratio is used Difference between value;
  • the adjustment unit is used to:
  • the uplink and downlink subframe ratio of the first cell is from the second upper and lower
  • the row subframe ratio is adjusted to the first uplink and downlink subframe ratio.
  • the determining unit is configured to:
  • Determining a neighboring cell of the first cell and selecting, from a neighboring cell of the first cell, a second cell that has an isolation degree with the first cell that meets the preset condition.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold value.
  • the controller further includes a configuration unit, where the configuration unit is configured to:
  • the uplink data sent by the user equipment UE is sent, and the received uplink data is sent to the first cell.
  • the interface unit is further configured to:
  • start location information is used to identify a starting location of the uplink data transmission of the UE, so that the first cell indicates a starting location of the uplink transmission of the UE.
  • a wireless access device for use in a time division duplex TDD communication system, where the TDD communication system has multiple uplink and downlink subframe ratios, and the wireless access device includes:
  • the adjusting unit is configured to adjust the uplink and downlink subframe ratio of the first cell from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio and the ratio The ratio of the first uplink and downlink subframes is different;
  • a determining unit configured to determine that the second cell with the isolation of the first cell meets the preset condition, and the uplink and downlink subframe ratio of the second cell is the second uplink and downlink subframe ratio;
  • an interface unit configured to send, to the second cell, indication information, to indicate that the second cell stops transmitting the downlink data channel in an intersecting time slot with the first cell.
  • the adjusting unit is configured to:
  • the wireless access device further includes a computing unit, where the computing unit is configured to:
  • the first capacity difference is a capacity when the first cell adopts the first uplink and downlink subframe ratio, and a capacity when the second uplink and downlink subframe ratio is used Difference between
  • the adjustment unit is used to:
  • the uplink and downlink subframe ratio of the first cell is from the The ratio of the two uplink and downlink subframes is adjusted to be the ratio of the first uplink and downlink subframes.
  • the determining unit is configured to:
  • Determining a neighboring cell of the first cell and selecting, from a neighboring cell of the first cell, a second cell that has an isolation degree with the first cell that meets a preset condition.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold value.
  • the wireless access device further includes a configuration unit, where the configuration unit is used :
  • the uplink data sent by the user equipment UE is sent, and the received uplink data is sent to the first cell.
  • the sending unit is further configured to:
  • start location information Sending start location information to the user equipment UE, where the start location information is used to indicate a starting location of the uplink transmission of the UE.
  • a communication system comprising any one of the third possible implementation manners of the fourth aspect to the fourth aspect, and the sixth possibility of the fifth aspect to the fifth aspect Any one of the implementations; or,
  • a method for uplink transmission including:
  • the radio access device of the first cell determines the starting location information of the user equipment UE in the first cell, where the starting location information is used to identify the starting location of the uplink data transmission of the UE;
  • the wireless access device of the first cell sends the start location information to the UE.
  • a ninth aspect provides a method for uplink transmission, including:
  • the user equipment UE receives the starting location information sent by the wireless access device of the first cell;
  • the UE performs uplink transmission according to the starting location information.
  • a scheme for controlling interference the scheme is applied to a TDD communication system, and the TDD communication system has multiple uplink and downlink subframe ratios.
  • the TDD communication system includes multiple cells, and the multiple cells include a first cell and a second cell.
  • the uplink-downlink subframe ratio of the first cell is the first uplink-downlink subframe ratio
  • the uplink-downlink subframe ratio of the second cell is the second uplink-downlink subframe ratio
  • the second uplink and downlink subframes are different in proportion, and the isolation between the first cell and the second cell meets the preset condition
  • the method includes: determining, by the wireless access device where the second cell is located, the cross slot of the first cell and the second cell,
  • the cross-slot is a subframe having the same subframe number in the first radio frame and the second radio frame, and is respectively used for transmission in different directions;
  • the first radio frame is a radio frame having a first uplink-downlink subframe
  • the communication system includes a controller, and the controller is used to coordinate multiple cells, and the method includes: The controller determines the first cell from the plurality of cells, and adjusts the uplink and downlink subframe ratio of the first cell to be the first uplink and downlink subframe ratio; the controller determines the second cell from the plurality of cells, and the second The isolation between the cell and the first cell meets the preset condition, and the uplink and downlink subframe ratio of the second cell is the second uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio and the first uplink and downlink subframe are matched.
  • the ratio is different.
  • the controller sends the indication information to the second cell, indicating that the second cell stops the transmission of the downlink data channel in the cross-slot with the first cell.
  • the uplink and downlink subframe ratio of the first cell The ratio of the uplink and downlink subframes of the second cell is different.
  • the second cell stops the transmission of the downlink data channel in the cross slot with the first cell, thus reducing the defect of the cross-slot interference;
  • the scheme is used in a TDD communication system, and the TDD communication system has multiple uplink and downlink subframe ratios, and the method includes: the first cell's wireless access device will be the first The uplink-downlink subframe ratio of the cell is adjusted from the second uplink-downlink subframe ratio to the first uplink-downlink subframe ratio, and the second uplink-downlink subframe ratio is different from the first uplink-downlink subframe ratio; the first cell The wireless access device determines the second cell that the isolation degree of the first cell meets the preset condition, and the uplink and downlink subframe ratio of the second cell is the second uplink and downlink subframe ratio; the wireless access of the first cell The device sends the indication information to the second cell, indicating that the second cell stops the transmission of the downlink data channel in the cross-slot with the first cell.
  • the uplink and downlink subframe ratio of the first cell and the second cell are different in ratio.
  • the second cell stops transmitting the downlink data channel in the cross slot with the first cell, thus reducing the defect of the cross-slot interference.
  • 1A is a schematic diagram of TDD in the prior art
  • 1B is a schematic diagram of a radio frame in the prior art
  • 1C is a schematic diagram of the ratio of uplink and downlink subframes of a radio frame in the prior art
  • 1D is a schematic diagram of cross-slot interference in the prior art
  • FIG. 2A is a schematic diagram of a contiguous networking in an embodiment of the present invention.
  • 2B is another schematic diagram of a contiguous networking in the embodiment of the present invention.
  • 2C is a flow chart of controlling interference in an embodiment of the present invention.
  • 2D is a schematic diagram of stopping transmission of a downlink data channel in a part of a symbol of a cross slot according to an embodiment of the present invention
  • 2E is another schematic diagram of stopping transmission of a downlink data channel in a part of a symbol of a cross slot according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of uplink transmission in an embodiment of the present invention.
  • FIG. 5 is an embodiment of controlling interference in an embodiment of the present invention.
  • 6A is a schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • 6B is another schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • 6C is another schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • 6D is a schematic structural diagram of another wireless access device according to an embodiment of the present invention.
  • FIG. 7A is a schematic structural diagram of a controller according to an embodiment of the present invention.
  • FIG. 7B is another schematic structural diagram of a controller according to an embodiment of the present invention.
  • FIG. 7C is another schematic structural diagram of a controller according to an embodiment of the present invention.
  • FIG. 7D is a schematic structural diagram of another controller in an embodiment of the present invention.
  • FIG. 8A is another schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • FIG. 8B is another schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • FIG. 8C is another schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • FIG. 8D is another schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • 8E is another schematic structural diagram of a wireless access device according to an embodiment of the present invention.
  • FIG. 9A is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 9B is another schematic structural diagram of a communication system according to an embodiment of the present invention.
  • Sub-frame ratio refers to the uplink and downlink subframe configuration in the radio frame, for example, seven uplink and downlink subframe configurations in Table 1.
  • Cross-slots refer to subframes with the same subframe number in the radio frames of different subframe ratios, and are used for transmission in different directions.
  • the adjacent two cells respectively use the subframe ratios of the configuration numbers "0" and "1" in Table 1, wherein the subframes #4 and #9 are used for uplink in the configuration sequence number "0". Transmission, and subframes #4 and #9 are used for downlink transmission in the configuration sequence number "1", therefore, Subframes #4 and #9 are cross slots. Then, the interference generated between the two cells as shown in FIG. 1D is the interference of the cross-slot.
  • contiguous networking also known as multi-cell networking, which may include networking between macro cells, networking between macro cells and micro cells, and networking between micro cells.
  • a wireless access device which is a device that accesses a UE to a wireless network, including but not limited to: an eNB (Evolved Node B), an RNC (Radio Network Controller), NB (Node B, Node B), BSC (Base Station Controller), BTS (Base Transceiver Station), home base station (for example, Home evolved NodeB, or Home Node B, HNB), Wifi ( Wireless Fidelity, AP (Access Point, Access Point), etc.
  • the wireless access device may also be a BBU (BaseBand Unit).
  • a controller for coordinating and controlling a plurality of wireless access devices which may be an independently set device, having a wired or wireless interface for connecting with multiple wireless access devices, or being integrated in a certain
  • the devices in the devices are, for example, integrated in one wireless access device, and the wireless access devices can be wired or wirelessly connected to other wireless access devices, and coordinate and control themselves and other wireless access devices.
  • the controllers may be independently connected devices connected to the BBUs, or may be devices integrated on a certain BBU.
  • UE also known as a terminal
  • UE is a device that provides voice and/or data connectivity to users, for example, a handheld device with wireless connectivity, and other processing connected to a wireless modem. Equipment, etc.
  • Multiple means two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • FIG. 2A and FIG. 2B are schematic diagrams of a contiguous networking scenario.
  • the same subframe configuration is used for the contiguous networking in the planning.
  • the configuration number "2" in Table 1 is taken as an example.
  • the configuration format of the configuration number "2" is adjusted to the configuration format of the configuration sequence number "1" in Table 1, as shown in FIG. 2B.
  • the set of the first cell to be adjusted to the configuration sequence number "1" is set to be a type 1 "hot spot area", and the second cell tightly coupled with the first cell is called 2' type "transition area", other loose coupling areas are type 2 "common areas”, wherein the configuration formats of the uplink and downlink subframes of the "transition area” and the "normal area” are the configuration numbers in Table 1.
  • the configuration format of 2 in this FIG. 2B, the "transition area” has strong interference to the "hot spot area" on the intersecting time slot.
  • the coupling here can be represented by the isolation of the inter-station antenna, the tight coupling indicates that the isolation is small, the interference between the base stations in the cross-slot is severe, the loose coupling indicates that the isolation is large, and the base stations are in the crossover.
  • the interference of the gap is small.
  • the system side can define the inter-station isolation map according to the distance between the stations and the antenna gain pattern, and adjust the matching pattern of the uplink and downlink subframes according to the isolation map between the stations, or manually set the matching ratio of the uplink and downlink subframes.
  • the present application defines a capacity/interference transition region, where the uplink and downlink capacity features of the transition region are consistent with the uplink and downlink capacity features of the hotspot region, and the uplink and downlink subframe ratios of the transition region are further related to the uplink and downlink subframes of the common region.
  • the matching ratio is consistent, thus shielding the inter-slot interference between the hot spot area and the normal area.
  • part of the symbols of the transition area are vacated to reduce the interference of the transition area to the hotspot area.
  • the cell in the "transition area" is controlled to not transmit downlink data in the downlink subframe of the cross-slot to reduce the interference of the cross-slot. the goal of.
  • a process for controlling interference is as follows, and the solution should be
  • the TDD communication system has multiple uplink and downlink subframe ratios, and the TDD communication system includes multiple cells:
  • Step 200 The controller determines the first cell from the multiple cells, and adjusts the uplink and downlink subframe ratio of the first cell to be the first uplink and downlink subframe ratio, and the controller is used to coordinate multiple cells.
  • Step 210 The controller determines, from the plurality of cells, the second cell.
  • the isolation between the second cell and the first cell meets a preset condition, and the uplink and downlink subframe ratio of the second cell is the second uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio and the first The ratio of the uplink and downlink subframes is different;
  • Step 220 The controller sends indication information to the second cell, indicating that the second cell stops transmitting the downlink data channel in the cross slot with the first cell.
  • Step 230 The radio access device where the second cell is located determines an intersecting slot of the first cell and the second cell.
  • the cross-slot is a subframe that has the same subframe number in the first radio frame and the second radio frame, and is used for transmission in different directions respectively;
  • the first radio frame is a radio frame with the first uplink-downlink subframe ratio.
  • the second radio frame is a radio frame having a second uplink and downlink subframe ratio;
  • Step 240 The radio access device where the second cell is located controls the second cell to stop sending the downlink data channel in the cross slot according to the indication information.
  • the controller determines the manner of the first cell, and may be as follows:
  • the controller acquires uplink and downlink load information of multiple cells
  • the controller determines, according to the uplink and downlink load information of the multiple cells, that the uplink and downlink subframe ratio is adjusted from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio as the first cell.
  • the controller acquires uplink load information of multiple cells, and uses the cell whose uplink load information reaches the uplink load preset threshold as the first cell, and/or the controller acquires downlink load information of multiple cells, and downlink load The cell whose information reaches the downlink load preset threshold is used as the first cell.
  • the uplink and downlink load information may be a physical resource block (PRB) occupancy rate.
  • PRB physical resource block
  • the controller does not immediately adjust the ratio of the uplink and downlink subframes of the first cell from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio. , but further to perform the following operations:
  • the controller calculates a first capacity difference, where the first capacity difference is a difference between a capacity when the first cell adopts the first uplink and downlink subframe ratio and a capacity when the second uplink and downlink subframe ratio is used;
  • the controller calculates a second capacity difference, where the second capacity difference is a difference between a capacity when the second cell adopts the first uplink and downlink subframe ratio and a capacity when the second uplink and downlink subframe ratio is used;
  • the controller when the controller adjusts the uplink and downlink subframe ratio of the first cell from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, the controller may adopt the following manner:
  • the uplink and downlink subframe ratio of the first cell is adjusted from the second uplink and downlink subframe ratio to the first A ratio of uplink and downlink subframes.
  • the uplink and downlink subframe ratio of the first cell is adjusted, if the capacity gain of the uplink and downlink subframe ratio adjustment of the second cell is greater than 0, the uplink and downlink subframe ratio of the first cell is compared.
  • the ratio of the two uplink and downlink subframes is adjusted to be the ratio of the first uplink and downlink subframes.
  • the cell 1 is the first cell
  • the configuration format of the initial uplink and downlink subframe ratio of the first cell is the configuration sequence number "1" in Table 1
  • the configuration format of the adjusted uplink and downlink subframe ratio is in Table 1.
  • the configuration number is "2”
  • the second cell is the cell 2, the cell 3, the cell 4, and the cell 5. If the configuration format of the uplink and downlink subframe ratio of the cell 1 is adjusted from the configuration number "1" to the configuration number "2"
  • the difference between the adjusted system capacity and the system capacity before the adjustment is the first capacity difference, and the configuration format of the uplink and downlink subframe ratio of the cell 2 is adjusted from the configuration number “1” to the configuration sequence number “2”.
  • the difference between the adjusted system capacity and the system capacity before the adjustment is the second capacity difference 1
  • the configuration format of the uplink and downlink subframe ratio of the cell 3 is adjusted from the configuration number “1” to the configuration number “2”.
  • the difference between the adjusted system capacity and the system capacity before the adjustment is the second capacity difference 2
  • the configuration format of the uplink and downlink subframe ratio of the cell 4 is adjusted from the configuration number “1” to the configuration sequence number “2”.
  • the difference between the system capacity and the system capacity before the adjustment is the second capacity difference of 3.
  • the configuration format of the uplink and downlink subframe ratio of the cell 5 is adjusted from the configuration number “1” to the configuration number “2”, and the adjusted The difference between the system capacity and the system capacity before the adjustment is the second capacity difference value 4.
  • the controller sets the configuration format of the uplink and downlink subframe ratio of the cell 1 from the configuration sequence number "1". Adjust to configure the sequence number "2". Otherwise, stop the configuration format of the uplink and downlink subframe ratio of cell 1 from the configuration number "1" to the configuration number "2":
  • the sum of the second capacity difference 1, the second capacity difference 2, the second capacity difference 3, and the second capacity difference 4 is less than 0, and the first capacity difference, the second capacity difference 1, and the second capacity difference
  • the sum of the value 2, the second capacity difference 3, and the second capacity difference 4 is greater than zero.
  • the controller determines the manner of the second cell in multiple manners.
  • the method may be as follows:
  • the controller determines a neighboring cell of the first cell, and selects a second cell that is equal to the preset condition from the neighboring cells of the first cell.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold.
  • the wireless access device where the second cell is located controls the second cell to stop transmitting the downlink data channel in the cross slot according to the indication information
  • the second cell may be controlled in the cross slot. The transmission of the downlink data channel is stopped on all symbols.
  • the second cell in order to avoid the impact on the throughput of the terminal in the second cell, when the second cell stops the transmission of the downlink data channel in the cross slot, the second cell may be controlled to be in the crossover. The transmission of the downlink data channel is stopped on the partial symbols in the slot.
  • the radio access device of the second cell controls the second cell to transmit the downlink data channel in the first two symbols in the cross slot, and transmits the lower industry data channel on the remaining other symbols.
  • the wireless access device where the second cell is located when the wireless access device where the second cell is located controls the second cell to stop the transmission of the downlink data channel on the part of the symbol in the cross-slot, the wireless access device where the second cell is located may be selected. Controlling the second cell to stop on the MBSFN (Multimedia Broadcast multicast service Single Frequency Network) symbol in the cross slot Transmission of the downlink data channel.
  • MBSFN Multimedia Broadcast multicast service Single Frequency Network
  • the radio access device where the second cell is located may control the second cell to allow the downlink data channel to be transmitted on the PDCCH symbol in the cross slot, as shown in FIG. 2D, so that the terminal in the second cell can be normally solved.
  • the tone does not affect the throughput of the terminal in the second cell.
  • the controller When the second cell stops transmitting the downlink data channel in the cross-slot, if the second cell does not use the symbol to stop transmitting the downlink data channel, there is a waste of resources. Therefore, in the embodiment of the present invention, in order to improve resource utilization. Rate, further, the controller also performs the following operations:
  • the controller configures the second cell to be the coordinated cell of the first cell, so that the second cell stops transmitting the downlink data channel in the cross slot with the first cell, receives the uplink data sent by the UE, and receives the uplink.
  • the data is sent to the first cell.
  • the configuration information is used to send the configuration information to the second cell, and the configuration information is used to configure the second cell as the coordinated cell of the first cell.
  • the second cell performs the following operations:
  • the radio access device where the second cell is located receives the configuration information sent by the controller, and the configuration information is used to configure the second cell as the coordinated cell of the first cell;
  • the radio access device in which the second cell is located receives the uplink data sent by the UE in the first cell on the symbol of stopping the transmission of the downlink data channel in the cross-slot according to the configuration information;
  • the radio access device where the second cell is located sends the received uplink data to the first cell.
  • the symbol that stops transmitting the downlink data channel in the cross-slot is not idle, and the second cell uses the symbol that stops transmitting the downlink data channel in the cross-slot to receive the uplink data sent by the UE in the first cell, and the received uplink is received.
  • the data is sent to the first cell, thus improving the utilization of resources.
  • the first cell not only receives the uplink data sent by the terminal in the first cell, but also receives the uplink data sent by the terminal in the first cell forwarded by the second cell, so that the first cell is also received.
  • the quality of the upstream data is also received.
  • the first cell needs to receive the uplink data sent by the terminal 1 in the first cell, and the second cell can receive the uplink data sent by the terminal 1 and send the received uplink data to the first cell.
  • the controller in order to reduce the interference of the uplink data received by the first cell, sends the indication information to the wireless access device where the second cell is located, so that the wireless access device where the second cell is located is controlled. After the second cell stops transmitting the downlink data channel in the cross slot, the controller further includes the following operations:
  • the controller sends the starting location information to the first cell, where the starting location information is used to identify the starting location of the uplink data transmission of the UE, so that the first cell indicates the starting location of the uplink transmission of the UE in the first cell.
  • the terminal in the first cell transmits the uplink data on the symbol that the second cell stops transmitting the downlink data channel, so that the interference of the second cell to the uplink reception of the first cell can be completely avoided.
  • the start location information may be location information of the start symbol, and the UE skips the symbol before the start symbol when uplinking, for example, skips 1 to 2 symbols, and starts to uplink at the start symbol. transmission.
  • the terminal in the first cell sends the uplink service data on the remaining other symbols except the first two slots of the cross slot.
  • the uplink transmission may include the control signaling transmission on the PUCCH (Physical Uplink Control CHannel), as shown in FIG. 2E, and may also include a PUSCH (Physical Uplink Shared Channel). Transmission of uplink data on the shared channel).
  • PUCCH Physical Uplink Control CHannel
  • PUSCH Physical Uplink Shared Channel
  • the controller may be located in the wireless access device, or may be an independently set device.
  • the controller may be in other forms, and details are not described herein.
  • the controller determines the first cell and the second cell, and adjusts the uplink and downlink subframe ratio of the first cell.
  • the first cell may also determine whether to adjust the uplink and downlink.
  • Sub-frame ratio, and determine the second cell the specific implementation process is as follows:
  • another process for controlling interference is as follows: the solution is applied to a TDD communication system, and the TDD communication system has multiple uplink and downlink subframe ratios, and the TDD communication
  • the letter system consists of multiple cells:
  • Step 300 The radio access device of the first cell adjusts the uplink-downlink subframe ratio of the first cell from the second uplink-downlink subframe ratio to the first uplink-downlink subframe ratio, and the second uplink-downlink subframe ratio. Different from the first uplink and downlink subframes;
  • Step 310 The radio access device of the first cell determines that the second cell with the isolation of the first cell meets the preset condition, and the ratio of the uplink and downlink subframes of the second cell is the ratio of the second uplink and downlink subframes.
  • Step 320 The radio access device of the first cell sends indication information to the second cell, indicating that the second cell stops transmitting the downlink data channel in the cross slot with the first cell.
  • Step 330 The radio access device where the second cell is located determines an intersecting slot of the first cell and the second cell.
  • the cross-slot is a subframe that has the same subframe number in the first radio frame and the second radio frame, and is used for transmission in different directions respectively;
  • the first radio frame is a radio frame with the first uplink-downlink subframe ratio.
  • the second radio frame is a radio frame having a second uplink and downlink subframe ratio;
  • Step 340 The radio access device where the second cell is located controls the second cell to stop sending the downlink data channel in the cross slot according to the indication information.
  • the radio access device of the first cell needs to adjust the ratio of the uplink and downlink subframes of the first cell to the ratio of the second uplink and downlink subframes to the ratio of the first uplink and downlink subframes. Do the following:
  • the radio access device of the first cell acquires uplink and downlink load information of the first cell
  • the radio access device of the first cell determines, according to the uplink and downlink load information of the first cell, that the uplink and downlink subframe ratio of the first cell is adjusted from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio. .
  • the controller acquires uplink load information of multiple cells, and uses the cell whose uplink load information reaches the uplink load preset threshold as the first cell, and/or the controller acquires downlink load information of multiple cells, and downlink load The cell whose information reaches the downlink load preset threshold is used as the first cell.
  • the uplink and downlink load information may be a PRB occupancy rate.
  • the first cell determines that the uplink and downlink subframes of the first cell need to be matched in order to avoid a decrease in the throughput of the system after performing step 300 to step 340.
  • the uplink and downlink subframe ratios of the first cell are not immediately adjusted from the second uplink and downlink subframe ratio to the first uplink and downlink. Subframe ratio, but further to do the following:
  • the radio access device of the first cell calculates a first capacity difference, where the first capacity difference is the capacity when the first cell adopts the first uplink and downlink subframe ratio and the capacity when the second uplink and downlink subframe ratio is used. Difference between the first capacity difference and the second uplink and downlink subframe ratio.
  • the wireless access device of the first cell calculates a second capacity difference, where the second capacity difference is the capacity when the second cell adopts the first uplink and downlink subframe ratio and the capacity when the second uplink and downlink subframe ratio is used. Difference between the second capacity difference and the second capacity difference.
  • the radio access device of the first cell adjusts the ratio of the uplink and downlink subframes of the first cell to the ratio of the second uplink and downlink subframes to the first uplink and downlink subframe ratio
  • the following may be adopted. the way:
  • the uplink and downlink subframe ratio of the first cell is adjusted from the second uplink and downlink subframe ratio to the first A ratio of uplink and downlink subframes.
  • the throughput of the system is not reduced.
  • the uplink and downlink subframe ratio of the first cell is adjusted, if the capacity gain of the uplink and downlink subframe ratio adjustment of the second cell is greater than 0, the uplink and downlink subframe ratio of the first cell is compared.
  • the ratio of the two uplink and downlink subframes is adjusted to be the ratio of the first uplink and downlink subframes.
  • the cell 1 is the first cell
  • the configuration format of the initial uplink and downlink subframe ratio of the first cell is the configuration sequence number "1" in Table 1
  • the configuration format of the adjusted uplink and downlink subframe ratio is in Table 1.
  • the configuration number is "2”
  • the second cell is the cell 2, the cell 3, the cell 4, and the cell 5. If the configuration format of the uplink and downlink subframe ratio of the cell 1 is adjusted from the configuration number "1" to the configuration number "2"
  • the difference between the adjusted system capacity and the system capacity before the adjustment is the first capacity difference, and the configuration format of the uplink and downlink subframe ratio of the cell 2 is adjusted from the configuration number “1” to the configuration sequence number “2”.
  • the difference between the adjusted system capacity and the system capacity before adjustment is the second capacity difference of 1, and the cell 3 is up and down.
  • the configuration format of the line subframe ratio is adjusted from the configuration number "1" to the configuration number "2"
  • the difference between the adjusted system capacity and the system capacity before the adjustment is the second capacity difference of 2
  • the cell 4 is up and down.
  • the configuration format of the line subframe ratio is adjusted from the configuration number "1" to the configuration number "2”
  • the difference between the adjusted system capacity and the system capacity before the adjustment is the second capacity difference of 3 and the cell 5 is up and down.
  • the controller adjusts the configuration format of the uplink-downlink subframe ratio of the cell 1 from the configuration sequence number "1" to the configuration sequence number "2". Otherwise, the configuration format of the uplink-downlink subframe ratio of the cell 1 is stopped. Adjust from configuration number "1" to configuration number "2":
  • the sum of the second capacity difference 1, the second capacity difference 2, the second capacity difference 3, and the second capacity difference 4 is less than 0, and the first capacity difference, the second capacity difference 1, and the second capacity difference
  • the sum of the value 2, the second capacity difference 3, and the second capacity difference 4 is greater than zero.
  • the method when the radio access device of the first cell determines that the second cell with the isolation of the first cell meets the preset condition, the method may be as follows:
  • the radio access device of the first cell determines a neighboring cell of the first cell, and selects, from the neighboring cells of the first cell, a second cell that has an isolation degree with the first cell that meets a preset condition.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold.
  • the wireless access device where the second cell is located controls the second cell to stop transmitting the downlink data channel in the cross slot according to the indication information
  • the second cell may be controlled in the cross slot. The transmission of the downlink data channel is stopped on all symbols.
  • the second cell in order to avoid the impact on the throughput of the terminal in the second cell, when the second cell stops the transmission of the downlink data channel in the cross slot, the second cell may be controlled to be in the crossover. The transmission of the downlink data channel is stopped on the partial symbols in the slot.
  • the radio access device of the second cell controls the second cell to transmit the downlink data channel in the first two symbols in the cross slot, and transmits the lower industry data channel on the remaining other symbols.
  • the wireless access device where the second cell is located controls the second cell at the time of intersection.
  • the radio access device where the second cell is located may control the second cell to stop the transmission of the downlink data channel on the MBSFN symbol in the cross slot.
  • the radio access device where the second cell is located may control the second cell to allow the downlink data channel to be transmitted on the PDCCH symbol in the cross slot, as shown in FIG. 2D, so that the terminal in the second cell can be normally solved.
  • the tone does not affect the throughput of the terminal in the second cell.
  • the radio access device of the first cell configures the second cell to be the coordinated cell of the first cell, so that the second cell stops transmitting the symbol of the downlink data channel in the cross slot with the first cell, and receives the symbol under the first cell.
  • the uplink data sent by the UE, and the received uplink data is sent to the first cell.
  • the wireless access device where the second cell is located also performs the following operations:
  • the radio access device where the second cell is located receives the configuration information sent by the radio access device where the first cell is located, and the configuration information is used to configure the second cell as the coordinated cell of the first cell;
  • the radio access device in which the second cell is located receives the uplink data sent by the UE in the first cell on the symbol of stopping the transmission of the downlink data channel in the cross-slot according to the configuration information;
  • the radio access device where the second cell is located sends the received uplink data to the first cell.
  • the radio access device of the first cell may be configured to send the configuration information to the second cell, where the configuration information is used to configure the second cell as the coordinated cell of the first cell.
  • the symbol that stops transmitting the downlink data channel is not idle, and the second cell stops transmitting the symbol of the downlink data channel, receives the data sent by the UE in the first cell, and sends the received data to the first cell, thereby improving The utilization of resources.
  • the first cell not only receives the uplink data sent by the terminal in the first cell, but also receives the uplink data sent by the terminal in the first cell forwarded by the second cell, and therefore improves the uplink data.
  • the quality of the uplink data received by the first cell is not only receives the uplink data sent by the terminal in the first cell, but also receives the uplink data sent by the terminal in the first cell forwarded by the second cell, and therefore improves the uplink data.
  • the quality of the uplink data received by the first cell is the quality of the uplink data received by the first cell.
  • the radio access device of the first cell in order to reduce the interference of the uplink data received by the first cell, the radio access device of the first cell sends the indication information to the radio access device where the second cell is located, so that the second cell is located.
  • the wireless access device controls the second cell to stop the transmission of the downlink data channel in the cross-slot, the method further includes the following operations:
  • the radio access device of the first cell sends the start location information to the UE under the first cell, where the start location information is used to indicate the start location of the uplink transmission of the UE.
  • the terminal in the first cell transmits the uplink data on the symbol that the second cell stops transmitting the downlink data channel, so that the interference of the second cell to the uplink reception of the first cell can be completely avoided.
  • the start location information may be location information of the start symbol, and the UE skips the symbol before the start symbol when uplinking, for example, skips 1 to 2 symbols, and starts to uplink at the start symbol. transmission.
  • the terminal in the first cell sends the uplink service data on the remaining other symbols except the first two slots of the cross slot.
  • the uplink transmission may include transmission of control signaling on the PUCCH, as shown in FIG. 2E, and may also include transmission of uplink data on the PUSCH.
  • the controller may be located in the wireless access device, or may be an independently set device. Of course, the controller may be in other forms, and details are not described herein.
  • an uplink transmission method is also proposed, which is applied to a TDD communication system, as shown in FIG. 4:
  • Step 400 The radio access device of the first cell determines the starting location information of the UE in the first cell, where the starting location information is used to identify the starting location of the uplink data transmission of the UE.
  • Step 410 The radio access device of the first cell sends the start location information to the UE.
  • Step 420 The UE receives the starting location information sent by the wireless access device of the first cell, and performs uplink transmission according to the starting location information.
  • the initial location information determined by the radio access device of the first cell may be determined by the radio access device of the first cell, or may be sent by the controller, and the controller is used to coordinate multiple a cell.
  • the wireless access device of the first cell further performs the following operations:
  • the ratio of the uplink and downlink subframes of the first cell is adjusted from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio is different from the first uplink and downlink subframe ratio; Or, receiving the configuration information sent by the controller, and adjusting the ratio of the uplink and downlink subframes of the first cell to the first uplink and downlink subframe ratio, and the second uplink and downlink subframe according to the configuration information.
  • the ratio is different from the ratio of the first uplink and downlink subframes.
  • the start location information may be carried in a new signaling, or may be carried in the existing signaling, such as DCI (Downlink Control Information). Information) transmission in signaling.
  • DCI Downlink Control Information
  • the start location information may be location information of the start symbol, and the UE skips the symbol before the start symbol when uplinking, for example, skips 1 to 2 symbols, and starts to uplink at the start symbol. transmission.
  • the uplink transmission may include transmission of control signaling on the PUCCH, and may also include transmission of uplink data on the PUSCH.
  • cell 1 There are 10 cells under the base station A: cell 1, cell 2, cell 3, cell 4, cell 5, cell 6, cell 7, cell 8, cell 9, cell 10.
  • Step 500 The controller acquires uplink load information corresponding to each of the 10 cells, and uses the cell with the corresponding uplink load information to reach the uplink load threshold as the first cell.
  • Step 510 The controller determines the neighboring cell of the cell 1, and selects a second cell with the isolation degree less than or equal to the preset isolation threshold from the neighboring cell: the cell 2, the cell 3, and the cell 4.
  • Step 520 The controller determines that the configuration format of the uplink-downlink subframe ratio of the cell 1 is adjusted from the configuration sequence number “2” shown in Table 1 to the configuration sequence number “1” shown in Table 1, and calculates the adjusted system capacity and When the first capacity difference of the system capacity before the adjustment and the configuration format of the uplink and downlink subframe ratio of the cell 2 are adjusted from the configuration number "2" shown in Table 1 to the configuration number "1” shown in Table 1, Calculate the difference between the adjusted system capacity and the second capacity of the system capacity before the adjustment.
  • the configuration format of the uplink and downlink subframe ratio of the cell 3 is adjusted from the configuration number “2” shown in Table 1 to the one shown in Table 1.
  • the sequence number is "1"
  • the difference between the adjusted system capacity and the system capacity before the adjustment is calculated.
  • the configuration format of the uplink and downlink subframe ratio of the cell 4 is from the configuration number "2" shown in Table 1.
  • the configuration number "1" shown in Table 1 is adjusted, the difference between the adjusted system capacity and the second capacity before adjustment is calculated as 3;
  • Step 530 The controller determines whether the sum of the second capacity difference 1, the second capacity difference 2, and the second capacity difference 3 is less than 0, and the first capacity difference, the second capacity difference 1, and the second capacity difference Whether the sum of the value 2 and the second capacity difference 3 is greater than 0, and if yes, executing step 540; otherwise, ending the process;
  • Step 540 The controller adjusts the configuration format of the uplink and downlink subframe ratio of the cell 1 from the configuration number “2” shown in Table 1 to the configuration sequence number “1” shown in Table 1;
  • Step 550 The controller sends indication information and configuration information to the cell 2, the cell 3, and the cell 4.
  • Step 560 The cell 2 determines to determine the cross slot according to the indication information, and stops the transmission of the downlink data channel in the cross slot, and stops transmitting the UE of the downlink data channel in the cross slot according to the configuration information.
  • Uplink data
  • Step 570 The radio access device where the cell 2 is located sends the received uplink data to the cell 1.
  • the cell 3 and the cell 4 are the same as the cell 2, and both step 560 and step 570 are performed.
  • the controller sends the indication information to the radio access device where the second cell is located, and indicates that the radio access device where the second cell is located controls the second cell in the cross slot with the first cell. Stop the transmission of the downlink data channel, or the wireless access device where the first cell is located. And sending the indication information to the radio access device where the second cell is located, indicating that the radio access device where the second cell is located controls the second cell to stop sending the downlink data channel in the cross slot with the first cell, thus solving the problem The interference problem of the cross-slots in the case of different uplink and downlink subframe configurations in the prior art.
  • an embodiment of the present invention provides a wireless access device, where the wireless access device is used in a TDD communication system, and the TDD communication system has multiple uplink and downlink subframe ratios.
  • the TDD communication system includes a plurality of cells, where the plurality of cells include a first cell and a second cell, and the uplink and downlink subframes of the first cell are matched by the first uplink and downlink subframes, and the uplink and downlink subframes of the second cell.
  • the ratio is the second uplink-downlink subframe ratio
  • the first uplink-downlink subframe ratio is different from the second uplink-downlink subframe ratio
  • the isolation between the first cell and the second cell meets a preset condition
  • the ingress device includes a determining unit 60 and a control unit 61, wherein:
  • a determining unit 60 configured to determine a cross slot of the first cell and the second cell, where the cross slot is a subframe that has the same subframe number in the first radio frame and the second radio frame, and is used for transmission in different directions,
  • the first radio frame is a radio frame having a first uplink and downlink subframe ratio
  • the second radio frame is a radio frame having a second uplink and downlink subframe ratio;
  • the control unit 61 is configured to control the second cell to stop sending the downlink data channel in the cross slot.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold.
  • the wireless access device further includes a first interface unit 62 that communicates with the controller, or a second interface unit 63 that communicates with other wireless access devices, for respectively:
  • control unit 61 When the control unit 61 stops the transmission of the downlink data channel in the cross slot by the second cell, the control unit 61 specifically:
  • the wireless access device further includes a first interface unit 62 that communicates with the controller, or a second interface unit 63 that communicates with other wireless access devices, for respectively:
  • a receiving unit 64 configured to communicate with the UE
  • the control unit 61 is configured to control, according to the configuration information, the receiving unit 64 to receive the uplink data sent by the UE in the first cell on the symbol that stops transmitting the downlink data channel in the cross slot, and control the second interface unit 63 to receive the received data.
  • the uplink data is sent to the first cell.
  • FIG. 6D another schematic structural diagram of a wireless access device according to an embodiment of the present invention includes at least one processor 601, a communication bus 602, a memory 603, and at least one communication interface 604.
  • the communication bus 602 is used to implement the connection and communication between the above components.
  • the communication interface 604 is configured to connect and communicate with an external device, and includes at least one of a communication interface with the controller, a communication interface with another wireless access device, and a communication interface with the UE. Wherein, the communication interface with the controller and other wireless access devices may adopt a wired interface.
  • the communication interface with the UE is a wireless interface, that is, it can communicate with the UE through the transmitter and the receiver, or communicate with the UE through the transceiver.
  • the memory 603 is configured to store executable program code, and the processor 601 executes the program code for:
  • the cross slot is a subframe having the same subframe number in the first radio frame and the second radio frame, and respectively used for transmitting in different directions, where the first radio frame has a radio frame matched by the first uplink and downlink subframes, where the second radio frame is a radio frame with a second uplink and downlink subframe ratio;
  • the second cell is controlled to stop transmission of the downlink data channel in the cross slot.
  • an embodiment of the present invention provides a controller for use in a TDD communication system.
  • the TDD communication system has multiple uplink and downlink subframe ratios, and the controller is used for coordination.
  • the plurality of cells, the controller includes a determining unit 70, an adjusting unit 71, and an interface unit 72, wherein:
  • a determining unit 70 configured to determine a first cell from multiple cells
  • the adjusting unit 71 is configured to adjust the uplink and downlink subframe ratio of the first cell from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio;
  • the determining unit 70 is further configured to determine the second cell from the plurality of cells, where the isolation between the second cell and the first cell meets a preset condition, and the uplink and downlink subframe ratio of the second cell is the second uplink and downlink sub-sub Frame ratio, and the second uplink and downlink subframe ratio is different from the first uplink and downlink subframe ratio;
  • the interface unit 72 is configured to send indication information to the second cell, to indicate that the second cell stops transmitting the downlink data channel in the cross slot with the first cell.
  • the ratio of the initial uplink and downlink subframes of the multiple cells is the ratio of the second uplink and downlink subframes
  • the determining unit 70 is configured to:
  • the controller further includes a calculating unit 73, and the calculating unit 73 is configured to:
  • the first capacity difference is a difference between a capacity when the first cell adopts the first uplink and downlink subframe ratio and a capacity when the second uplink and downlink subframe ratio is used;
  • the second capacity difference is a difference between a capacity when the second cell adopts the first uplink and downlink subframe ratio and a capacity when the second uplink and downlink subframe ratio is used;
  • the adjusting unit 71 is used to:
  • the uplink and downlink subframe ratio of the first cell is adjusted from the second uplink and downlink subframe ratio to the first A ratio of uplink and downlink subframes.
  • the determining unit 70 is configured to:
  • Determining a neighboring cell of the first cell and selecting, from a neighboring cell of the first cell, a second cell that has an isolation degree with the first cell that meets a preset condition.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold.
  • the controller further includes a configuration unit 74, where the configuration unit 74 is configured to:
  • the second cell As the coordinated cell of the first cell, so that the second cell stops receiving the uplink data of the downlink data channel in the cross-slot of the first cell, and receives the uplink data sent by the user equipment UE in the first cell, And receiving the received uplink data to the first cell.
  • the interface unit 72 is further configured to:
  • start location information is used to identify a starting location of the uplink data transmission of the UE, so that the first cell indicates a starting location of the uplink transmission of the UE.
  • FIG. 7D another schematic structural diagram of a controller according to an embodiment of the present invention includes at least one processor 701, a communication bus 702, a memory 703, and at least one communication interface 704.
  • the communication bus 702 is used to implement the connection and communication between the above components.
  • the communication interface 704 is used to connect and communicate with an external device, for example, including a communication interface with the wireless access device.
  • the communication interface between the controller and the wireless access device may adopt a wired interface.
  • the memory 703 is configured to store executable program code, and the processor 701 executes the program code for:
  • the isolation between the second cell and the first cell is a preset condition
  • the uplink and downlink subframe ratio of the second cell is the second uplink and downlink subframe ratio
  • the second The ratio of the uplink and downlink subframes is different from that of the first uplink and downlink subframes
  • the indication information is sent to the second cell through the communication interface 704, indicating that the second cell stops transmitting the downlink data channel in the cross slot with the first cell.
  • an embodiment of the present invention provides a wireless access device, where the wireless access device is used in a TDD communication system, and the TDD communication system has multiple uplink and downlink subframe ratios.
  • the wireless access device includes an adjustment unit 80, a determining unit 81, and an interface unit 82, wherein:
  • the adjusting unit 80 is configured to adjust the uplink and downlink subframe ratio of the first cell from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio and the first uplink and downlink Subframe ratio is different;
  • a determining unit 81 configured to determine a second cell that the isolation degree of the first cell meets a preset condition, and the uplink and downlink subframe ratio of the second cell is a second uplink and downlink subframe ratio;
  • the interface unit 82 is configured to send indication information to the second cell, to indicate that the second cell stops transmitting the downlink data channel in the cross slot with the first cell.
  • the adjusting unit 80 is configured to:
  • the wireless access device further includes a calculating unit 83, and the calculating unit 83 is configured to:
  • the first capacity difference is a difference between a capacity when the first cell adopts the first uplink and downlink subframe ratio and a capacity when the second uplink and downlink subframe ratio is used;
  • the second capacity difference is a difference between a capacity when the second cell adopts the first uplink and downlink subframe ratio and a capacity when the second uplink and downlink subframe ratio is used;
  • the adjustment unit 80 is used to:
  • the uplink and downlink subframe ratio of the first cell is adjusted from the second uplink and downlink subframe ratio to the first A ratio of uplink and downlink subframes.
  • the determining unit 81 is configured to:
  • Determining a neighboring cell of the first cell and selecting, from a neighboring cell of the first cell, a second cell that has an isolation degree with the first cell that meets a preset condition.
  • the preset condition is that the isolation is less than or equal to the preset isolation threshold.
  • the wireless access device further includes a configuration list.
  • configuration unit 84 is used to:
  • the second cell As the coordinated cell of the first cell, so that the second cell stops receiving the uplink data of the downlink data channel in the cross-slot of the first cell, and receives the uplink data sent by the user equipment UE in the first cell, And receiving the received uplink data to the first cell.
  • the sending unit 85 is further configured to:
  • start location information is used to indicate a starting location of the uplink transmission of the UE.
  • FIG. 8E another schematic structural diagram of a wireless access device according to an embodiment of the present invention includes at least one processor 801, a communication bus 802, a memory 803, and at least one communication interface 804.
  • the communication bus 802 is used to implement the connection and communication between the above components.
  • the communication interface 804 is configured to connect and communicate with an external device, and includes at least one of a communication interface with the controller, a communication interface with another wireless access device, and a communication interface with the UE. Wherein, the communication interface with the controller and other wireless access devices may adopt a wired interface.
  • the communication interface with the UE is a wireless interface, that is, it can communicate with the UE through the transmitter and the receiver, or communicate with the UE through the transceiver.
  • the memory 803 is configured to store executable program code, and the processor 801 executes the program code for:
  • the ratio of the uplink and downlink subframes of the first cell is adjusted from the second uplink and downlink subframe ratio to the first uplink and downlink subframe ratio, and the second uplink and downlink subframe ratio is different from the first uplink and downlink subframe ratio;
  • the indication information is sent to the second cell through the communication interface 804, indicating that the second cell stops transmitting the downlink data channel in the cross slot with the first cell.
  • an embodiment of the present invention provides a communication system, including the wireless access device shown in any of FIG. 6A-FIG. 6D, and FIG. 7A 7D controller shown in any of the figures; or,
  • FIG. 6A - FIG. 6D Including the wireless access device as shown in any one of FIG. 6A - FIG. 6D, and FIG. 8A - FIG. 8E Another wireless access device as shown in any of the figures.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus functions in one or more blocks of a flow or a flow diagram and/or block diagram of a flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions in one or more blocks of the flowchart or in a flow or block of the flowchart.

Abstract

La présente invention concerne le domaine technique des communications mobiles, et en particulier un procédé et un appareil de de commande d'interférences. Une unité de commande envoie des informations d'instruction à un dispositif d'accès sans fil où une seconde cellule se situe, et ordonne au dispositif d'accès sans fil où la seconde cellule se situe, de commander la seconde cellule pour arrêter l'envoi d'un canal de données en liaison descendante dans un créneau temporel croisé entre la seconde cellule et une première cellule; ou, un dispositif d'accès sans fil où la première cellule se situe envoie des informations d'instructions au dispositif d'accès sans fil où la seconde cellule se situe, et ordonne au dispositif d'accès sans fil où la seconde cellule se situe de commander la seconde cellule pour arrêter l'envoi d'un canal de données en liaison descendante dans le créneau temporel croisé entre la seconde cellule et la première cellule. De cette manière, il est possible de résoudre le problème de l'art antérieur concernant les interférences de créneaux temporels croisés dans le cas de différentes configurations de sous-trame de liaison montante et de liaison descendante.
PCT/CN2015/073008 2015-02-13 2015-02-13 Procédé et appareil de commande d'interférences, et système de communication WO2016127394A1 (fr)

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CN201580001872.2A CN106165484B (zh) 2015-02-13 2015-02-13 一种控制干扰的方法、装置，以及通信系统

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