WO2014101236A1 - Procédé de coordination d'interférences dans un canal de liaison montante et station de base - Google Patents

Procédé de coordination d'interférences dans un canal de liaison montante et station de base Download PDF

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Publication number
WO2014101236A1
WO2014101236A1 PCT/CN2012/088139 CN2012088139W WO2014101236A1 WO 2014101236 A1 WO2014101236 A1 WO 2014101236A1 CN 2012088139 W CN2012088139 W CN 2012088139W WO 2014101236 A1 WO2014101236 A1 WO 2014101236A1
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WIPO (PCT)
Prior art keywords
base station
resource
request
resource allocation
allocation information
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PCT/CN2012/088139
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English (en)
Chinese (zh)
Inventor
汤斌淞
陈啸
Original Assignee
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 CN201280023746.3A priority Critical patent/CN104145516B/zh
Priority to PCT/CN2012/088139 priority patent/WO2014101236A1/fr
Publication of WO2014101236A1 publication Critical patent/WO2014101236A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an uplink channel interference coordination method and a base station. Background technique
  • a base station transmits data and/or control information to a user equipment on the downlink and receives data and/or control information of the user equipment on the uplink.
  • the uplink channel includes a PUCCH (Physical Uplink Control Channel) and a PU Uplink Shared Channel (Physical Uplink Shared Channel).
  • PUCCH Physical Uplink Control Channel
  • PU Uplink Shared Channel Physical Uplink Shared Channel
  • Heterogeneous Network Heterogeneous Network
  • the scenario of sharing the spectrum by the macro cell and the Pico cell does not apply to the above uplink RB staggering mechanism.
  • the network topology is no longer peer-to-peer Macro (Macro) - Macro (Macro), but Pico (pico cell) and Macro (macro cell) cells are using the same frequency, and Pico is completely under Macro, Macro edge
  • Pico is completely under Macro, Macro edge
  • the high-interference uplink power will run through Pico (whether it is the edge of Pico or the center of Pico), and its path loss to Pico is even smaller than that of Macro itself, with low signal attenuation and high interference power, so it is impossible to coordination. Summary of the invention
  • An embodiment of the present invention provides an uplink channel interference coordination method and a base station, which can coordinate interference of an uplink channel in a scenario in which a macro cell and a pico cell share a spectrum.
  • a method for coordinating uplink channel interference including:
  • the first base station sends a resource interlace request to the second base station or the centralized node, where the resource interleave request is used to request resource interleaving;
  • first resource allocation information that is determined by the second base station or the centralized node according to the resource interleave request, where the first resource allocation information includes an uplink control channel of the first base station, and
  • the uplink control channel of the second base station performs time domain interleaving, and/or the uplink data channel of the first base station and the uplink data channel of the second base station perform frequency domain or time domain interleaving;
  • the first base station performs resource scheduling on the user equipment according to the first resource allocation information.
  • the method before the first base station sends a resource interleave request to the second base station or the centralized node, the method further includes:
  • the first base station performs resource allocation according to the PRB resource occupancy rate of the first base station and the PRB resource occupancy rate of the second base station, to obtain second resource allocation information;
  • the resource interleave request sent by the first base station includes the second resource allocation information, so that the second base station or the centralized node according to the second resource allocation information in the resource interlace request Determining the first resource allocation information.
  • the method includes: the first base station identifying a user equipment that generates uplink interference;
  • the first base station performs resource scheduling on the user equipment according to the first resource allocation information, and includes: the first base station performs resource scheduling on the user equipment that generates uplink interference according to the first resource allocation information.
  • the first base station to identify the user equipment that generates the uplink interference, includes:
  • the first base station determines, according to the location of the user equipment and/or the signal strength of the uplink signal sent by the user equipment, whether the user equipment is a user equipment that generates uplink interference.
  • the uplink signal sent by the user equipment is one of the following:
  • the uplink reference signal the channel sounding reference signal, and the demodulation reference signal.
  • the second aspect provides a method for coordinating uplink channel interference, including:
  • the second base station receives the resource interleave request of the first base station, where the resource interleave request is used to request resource interleave; the second base station determines the first resource allocation information according to the resource interleave request, where the first resource allocation information includes The uplink control channel of the first base station is time-interleaved with the uplink control channel of the second base station, and/or the uplink data channel of the first base station is interleaved with the uplink data channel of the second base station in frequency domain or time domain. ;
  • the second base station performs resource scheduling on the user equipment according to the first resource allocation information.
  • the second base station is configured according to the first Before the resource allocation information is used for resource scheduling of the user equipment, the method further includes:
  • the second base station identifies the user equipment that generates uplink interference
  • the second base station performs resource scheduling on the user equipment according to the first resource allocation information, where: the second base station performs resource scheduling on the user equipment that generates uplink interference according to the first resource allocation information.
  • the second base station to identify the user equipment that generates the uplink interference, includes:
  • the second base station determines, according to the location of the user equipment and/or the signal strength of the uplink signal sent by the user equipment, whether the user equipment is a user equipment that generates uplink interference.
  • the third aspect provides a method for coordinating uplink channel interference, including:
  • the centralized node receives the resource interleave request, and the resource interleave request is used to request resource interleave; the centralized node acquires the PRB resource occupancy rate of the physical resource block of the first base station and the PRB resource occupation of the second base station according to the resource interleave request Rate
  • the centralized node performs resource allocation according to the PRB resource occupancy rate of the first base station and the PRB resource occupancy rate of the second base station, to obtain first resource allocation information; the first resource allocation information includes the first
  • the uplink control channel of the base station is time-interleaved with the uplink control channel of the second base station, and/or the uplink data channel of the first base station and the uplink data channel of the second base station are frequency-domain or time-domain interleaved;
  • the allocation information is used to perform resource scheduling on the user equipment.
  • a base station including:
  • a requesting unit configured to send a resource interlace request to the second base station or the centralized node, where the resource interlace request is used to request resource interleaving
  • a first allocation determining unit configured to receive first resource allocation information that is determined by the second base station or the centralized node according to the resource interleaving request, where the first resource allocation information includes an uplink control channel of the base station
  • the uplink control channel of another base station performs time domain interleaving, and/or the uplink data channel of the base station performs frequency domain or time domain interleaving with the uplink data channel of the another base station;
  • the first resource scheduling unit is configured to perform resource scheduling on the user equipment according to the first resource allocation information.
  • the method further includes:
  • An information acquiring unit configured to acquire a physical resource block PRB resource occupancy rate of the base station and a PRB resource occupancy rate of the another base station, before the requesting unit sends the resource interlace request;
  • an allocating unit configured to perform resource allocation according to the PRB resource occupancy rate of the base station and the PRB resource occupancy rate of the another base station, to obtain second resource allocation information;
  • the resource interleave request sent by the requesting unit includes the second resource allocation information, so that the second base station or the centralized node determines according to the second resource allocation information in the resource interleaving request.
  • the first resource allocation information includes the second base station or the centralized node determines according to the second resource allocation information in the resource interleaving request.
  • the method further includes:
  • a first identifying unit configured to: after the first resource scheduling unit performs resource scheduling on the user equipment according to the first resource allocation information, identify a user equipment that generates uplink interference;
  • the first resource scheduling unit is configured to perform resource scheduling on the user equipment that generates uplink interference according to the first resource allocation information.
  • the first identification unit is specifically configured to be used according to a user
  • the location of the device and/or the signal strength of the uplink signal sent by the user equipment determines whether the user equipment is a user equipment that generates uplink interference.
  • a base station including a transceiver, a memory, and a processor connected to the transceiver and the memory:
  • the transceiver is configured to send a resource interlace request to a second base station or a centralized node, where the resource interleave request is used to request resource interleave; and the receiving the second base station or the centralized node is determined according to the resource interleave request
  • the first resource allocation information where the first resource allocation information includes an uplink control channel of the first base station and a time domain interlace of an uplink control channel of the second base station, and/or an uplink data channel of the first base station
  • the uplink data channel of the second base station performs frequency domain or time domain interleaving;
  • the program stores a set of program codes
  • the processor is configured to invoke the program code stored in the memory, to perform the following operations: performing resource scheduling on the user equipment according to the first resource allocation information.
  • a base station including:
  • a request receiving unit configured to receive a resource interleaving request of another base station, where the resource interleaving request is used to request resource interleaving
  • a second allocation determining unit configured to determine first resource allocation information according to the resource interleave request, where the first resource allocation information includes an uplink control channel of the base station and a time domain interlace of an uplink control channel of another base station, and / or the uplink data channel of the base station base station is frequency-domain or time-domain interleaved with the uplink data channel of the another base station;
  • a second resource scheduling unit configured to perform resource scheduling on the uplink information of the user equipment according to the resource allocation determined by the second allocation determining unit.
  • the method further includes:
  • a second identifying unit configured to: after the second resource scheduling unit performs resource scheduling on the user equipment according to the first resource allocation information, identify a user equipment that generates uplink interference;
  • the second resource scheduling unit is configured to perform resource scheduling on the user equipment that generates uplink interference according to the first resource allocation information.
  • the second identifying unit is specifically configured to be used according to the location of the user equipment and/or the uplink sent by the user equipment.
  • the signal strength of the signal determines whether the user equipment is a user equipment that generates uplink interference.
  • a base station including a transceiver, a memory, and a processor connected to the transceiver and the memory:
  • the transceiver is configured to receive a resource interlace request of a first base station, where the resource interleave request is used to request resource interleaving;
  • the program stores a set of program codes
  • the processor is configured to invoke program code stored in the memory to perform the following operations:
  • the resource interleave request determining, by the resource interleave request, the first resource allocation information, where the first resource allocation information includes an uplink control channel of the first base station and an uplink control channel of the second base station, and/or the first The uplink data channel of the base station is interleaved with the uplink data channel of the second base station in frequency domain or time domain;
  • a centralized device including:
  • a request receiving module configured to receive a resource interleaving request, where the resource interleaving request is used to request resource interleaving
  • an information acquiring module configured to acquire, according to the resource interleaving request, a physical resource block PRB resource occupancy rate of the first base station and a second base station PRB resource occupancy rate
  • a resource allocation module configured to: according to the PRB resource occupancy rate of the first base station, and the second base station
  • the resource allocation information of the PRB resource is used to obtain the first resource allocation information.
  • the first resource allocation information includes an uplink control channel of the first base station and an uplink control channel of the second base station, and/or the The uplink data channel of the first base station is frequency-domain or time-domain interleaved with the uplink data channel of the second base station; and the allocation sending module is configured to send the first resource allocation information to the first base station and/or the The second base station is configured to enable the first base station and/or the second base station to perform resource scheduling on the user equipment according to the first resource allocation information.
  • a centralized device comprising a transceiver, a memory, and a processor coupled to the transceiver and the memory:
  • the transceiver is configured to receive a resource interlace request, where the resource interleave request is used to request resource interleaving; and send the first resource allocation information to the first base station and/or the second base station, so that the first base station and/or the first The second base station performs resource scheduling on the user equipment according to the first resource allocation information.
  • the program stores a set of program codes
  • the processor is configured to invoke program code stored in the memory to perform the following operations:
  • the first resource allocation information includes an uplink control channel of the first base station Performing time domain interleaving with the uplink control channel of the second base station, and/or uplink data channel of the first base station and frequency domain or time domain interleaving of the uplink data channel of the second base station.
  • resource allocation is performed on two base stations that interfere with each other, and time-domain coordination and/or frequency domain coordination is used to implement interlace of UE uplink resources in two base station cells, thereby reducing uplink interference between UEs.
  • 1 is a schematic diagram of a neighboring cell in which interference exists
  • 2a is a flowchart of a first embodiment of an uplink channel interference coordination method according to the present invention
  • 2b is a flowchart of a second embodiment of an uplink channel interference coordination method according to the present invention.
  • 2c is a flowchart of a third embodiment of an uplink channel interference coordination method according to the present invention.
  • FIG. 3a is a flowchart of a second embodiment of an uplink channel interference coordination method according to the present invention.
  • FIG. 3b is a schematic diagram of a subframe used when Pico and Macro perform interference coordination by time domain interleaving in the embodiment shown in FIG. 3a;
  • FIG. 3c is a schematic diagram of an RBG used when Pico and Macro perform interference coordination by frequency domain interleaving in the embodiment shown in FIG. 3a;
  • FIG. 4 is a flowchart of a third embodiment of an uplink channel interference coordination method according to the present invention
  • FIG. 5 is a flowchart of a first embodiment of a method for identifying a UE that generates uplink interference
  • FIG. 6 is a schematic diagram of a location of a UE in a Macro cell and a Pico cell in the embodiment shown in FIG. 5; Flowchart of a second embodiment of the identification method;
  • FIG. 8 is a schematic structural diagram of a first embodiment of a base station according to the present invention.
  • FIG. 9 is a schematic structural diagram of a second embodiment of a base station according to the present invention.
  • FIG. 10 is a schematic structural diagram of a third embodiment of a base station according to the present invention.
  • FIG. 11 is a schematic structural diagram of a fourth embodiment of a base station according to the present invention.
  • FIG. 12 is a schematic structural diagram of a fifth embodiment of a base station according to the present invention.
  • FIG. 13 is a schematic structural view of a first embodiment of a centralized device according to the present invention.
  • FIG. 14 is a schematic structural view of a second embodiment of a centralized device according to the present invention. detailed description
  • LTE uses ICIC technology (inter-cell interference coordination technology) to avoid the use of the same frequency resources at the cell edge, so as to coordinate its interference from the resource point of view, for example, a cell edge scheduling RBG in the adjacent interval (RB group) are mutually staggered.
  • ICIC inter-cell interference coordination technology
  • Celll uses the higher frequency RB resource
  • Cell 2 uses the lower frequency RB resource
  • Cell3 uses RB resources of other intra-office frequencies. Therefore, when the same frequency band is used in the cell, resources are staggered at the RB granularity to coordinate interference.
  • the Macro (macro cell) Macro (macro cell) network scenario resources can be relatively staggered by using the above ICIC technology in the cell neighboring area (the same frequency base station, the edge band RB level is staggered).
  • HetNet Heterogeneous Network
  • the scenario of sharing spectrum with a macro cell and a pico cell is completely incompatible with the above-mentioned uplink RB staggering mechanism.
  • an embodiment of the present invention provides an uplink channel interference coordination method and a base station, which can coordinate interference of an uplink channel in a scenario in which a macro cell and a pico cell share a spectrum.
  • FIG. 2a a flowchart of a first embodiment of an uplink channel interference coordination method according to the present invention is shown.
  • the method can include:
  • Step 201a The first base station sends a resource interlace request to the second base station or the centralized node.
  • the first base station may send a resource interlace request when receiving uplink interference, or may interfere with each other between base stations.
  • the resource interleave request is actively sent in the case.
  • the resource interleaving request is used to request resource interleaving.
  • the first base station may obtain traffic information in advance of the first base station and the second base station, e.g. PRB (Phy S i C al Resource Block, physical resource block) resource occupancy rate, in accordance with the first base station and the second base station
  • PRB Physical S i C al Resource Block, physical resource block
  • the traffic information is allocated, the second resource allocation information is obtained, and then the resource interleave request is sent, and the second resource allocation information is included in the request.
  • the first base station may also directly initiate a resource interleave request without first performing resource allocation.
  • the first base station may also obtain the traffic information of the first base station and the second base station in advance, and in the resource interlace request.
  • the traffic information of the two base stations is included; the resource interleaving request may also not include the traffic information of the two base stations.
  • the first base station may send the resource interlace request to the second base station by using an interface between the base stations, such as an X2 interface.
  • the resource interlace request may also be sent to the centralized node of the first base station and the second base station, and then passed.
  • the centralized node sends the request to the second base station.
  • the first base station may also directly send the resource interlace request to the centralized node to request resource allocation.
  • Step 202a the first base station receives the first resource allocation information that is determined by the second base station or the centralized node according to the resource interleave request, where the first resource allocation information includes the uplink control channel of the first base station and the uplink control channel of the second base station.
  • the domain is interleaved, and/or the uplink data channel of the first base station is interleaved with the uplink data channel of the second base station in frequency domain or time domain.
  • the second base station may acquire the second resource allocation information therein, and then confirm whether the request is performed.
  • the resource allocation is allowed, and the second resource allocation information is generated by the result of the resource allocation, and is fed back to the first base station.
  • the information may be sent to the first base station through an X2 interface or a centralized node. If the request is sent to the centralized node, the centralized node can confirm whether the resource allocation is allowed, and whether the result of the resource allocation is allowed to generate the second resource allocation information is fed back to the first base station.
  • the first resource allocation information is the same as the second resource allocation information, and if not allowed, the first resource allocation information and the first resource allocation information The two resource allocation information is different.
  • the second base station may be included according to the resource interleaving request (or the second The traffic information of the first base station and the traffic information of the second base station (the traffic information may be the PRB resource occupancy rate), and then performing resource allocation to generate the first resource allocation information, and the first resource is obtained.
  • the allocation information is fed back to the first base station, and specifically, may be sent to the first base station through an X2 interface or a centralized node.
  • the centralized node may according to the traffic information of the first base station included in the resource interleaving request (or obtained by the centralized node) and the traffic information of the second base station (the The traffic information may be the PRB resource occupancy rate, and then the resource allocation generates the first resource allocation information, and the first resource allocation information is fed back to the first base station.
  • the first base station After receiving the first resource allocation information, the first base station determines the resource allocation according to the first resource allocation information.
  • the first resource allocation information includes that the uplink control channel of the first base station performs time domain interleaving with the uplink control channel of the second base station, and/or the uplink data channel of the first base station and the uplink data channel of the second base station perform frequency domain or time. Domains are interlaced
  • the time domain interleaving means that the first base station and the second base station respectively use different subframes to transmit uplink information, and the uplink information may be uplink control information and/or uplink data information; the frequency domain interleaving is the first base station and the second base station. Different RBs are used to transmit uplink information, and the uplink information is uplink data information.
  • Step 203a The first base station performs resource scheduling on the UE according to the first resource allocation information.
  • the first base station and the second base station may perform resource scheduling on the uplink information of the respective UEs to coordinate the uplink interference, that is, reduce the uplink interference between the UEs.
  • the first base station and the second base station may enable all UEs in the respective base stations to participate in the foregoing coordination or scheduling.
  • the UEs that generate uplink interference may also be separately identified, and then only generated. Interfering UEs participate in the coordination to reduce resource waste. For details, please refer to the description of the subsequent embodiments.
  • the first base station and the second base station may be any one of a Macro (macro cell) and a Micro (micro cell, Pico (pico cell)).
  • resource allocation is performed on two base stations that interfere with each other, and time-domain coordination and/or frequency domain coordination is used to implement interlace of UE uplink resources in two base station cells, thereby reducing uplink interference between UEs.
  • FIG. 2b a flowchart of a second embodiment of an uplink channel interference coordination method according to the present invention is shown.
  • the embodiment of the present invention is described in the opposite end of the execution body of the embodiment shown in FIG. 2a, that is, the second base station is used as an execution entity, and the method may include:
  • Step 201b The second base station receives a resource interlace request of the first base station.
  • the first base station sends the resource interlace request when receiving uplink interference from the user equipment of the second base station, or actively sends the resource interlace request when it is likely to be interfered. This resource interleaving request is used to request resource error.
  • the first base station sends the resource interlace request to the second base station by using an interface between the base stations or the centralized node, where the resource interlace request may include the first base station according to the traffic information of the first base station and the traffic information of the second base station ( The traffic information may be the second resource allocation information determined by the PRB resource occupancy rate, or may not include the second resource allocation information.
  • Step 202b The second base station determines, according to the resource interlace request, the first resource allocation information, where the first resource allocation information includes an uplink control channel of the first base station and an uplink control channel of the second base station, and performs time domain interleaving, and/ Or the uplink data channel of the first base station is interleaved with the uplink data channel of the second base station in frequency domain or time domain.
  • the first resource allocation information includes an uplink control channel of the first base station and an uplink control channel of the second base station, and performs time domain interleaving, and/ Or the uplink data channel of the first base station is interleaved with the uplink data channel of the second base station in frequency domain or time domain.
  • the second base station determines the resource allocation according to the second resource allocation information, generates the first resource allocation information, and then feeds back to the first base station. If the resource allocation request received by the second base station does not include the second resource allocation information, the second base station acquires the traffic information of the first base station and the traffic information of the second base station, and then determines the second resource allocation information, and the The second resource allocation information is fed back to the first base station.
  • the first resource allocation information includes that the uplink control channel of the first base station performs time domain interleaving with the uplink control channel of the second base station, and/or the uplink data channel of the first base station and the uplink data channel of the second base station perform frequency domain or time. Domains are interlaced
  • the time domain interleaving means that the first base station and the second base station respectively use different subframes to transmit uplink information, and the uplink information may be uplink control information and/or uplink data information; the frequency domain interleaving is the first base station and the second base station.
  • Different RBGs are used to transmit uplink information, and the uplink information is uplink data information.
  • Step 203b The second base station performs resource scheduling on the user equipment according to the first resource allocation information.
  • the second base station may further identify the user equipment that generates the uplink interference.
  • the second base station may perform resource scheduling only on the user equipment that generates the uplink interference according to the first resource allocation information.
  • the user equipment that generates the uplink interference is identified, and specifically, whether the user equipment is a user equipment that generates uplink interference is determined according to the location of the user equipment and/or the signal strength of the uplink signal sent by the user equipment.
  • resource allocation is performed on two base stations that interfere with each other, and time-domain coordination and/or frequency domain coordination is used to implement interlace of UE uplink resources in two base station cells, thereby reducing uplink interference between UEs.
  • 2c is a flowchart of a third embodiment of an uplink channel interference coordination method according to the present invention.
  • the method may include:
  • Step 201c The centralized node receives the resource interlace request.
  • the resource interlace request is used to request resource interleaving, and the request may be sent by the first base station or by the second base station.
  • Step 202c The centralized node acquires traffic quantity information of the first base station and the second base station.
  • the traffic information of the first base station and the second base station may be included in the resource interlace request, or may be acquired by the centralized node.
  • the traffic information is specifically the PRB occupancy rate.
  • Step 203c The centralized node performs resource allocation according to the traffic information of the first base station and the second base station, to obtain first resource allocation information, where the first resource allocation information includes uplink control channel of the first base station and uplink control of the second base station.
  • the channel performs time domain interleaving, and/or uplink data channel of the first base station and uplink of the second base station
  • the data channel is interleaved in frequency or time domain.
  • Step 204c The centralized node sends the first resource allocation information to the first base station and/or the second base station, so that the first base station and/or the second base station perform resource scheduling on the user equipment according to the resource allocation.
  • resource allocation is performed on two base stations that interfere with each other, and time-domain coordination and/or frequency domain coordination is used to implement interlace of UE uplink resources in two base station cells, thereby reducing uplink interference between UEs.
  • FIG. 3a a flowchart of a fourth embodiment of an uplink channel interference coordination method according to the present invention is shown.
  • the first base station is Pico
  • the second base station is a Macro as an example.
  • the Pico cell receives uplink interference from the UE of the Macro cell.
  • the uplink channel interference coordination method may include: Step 301: The Pico obtains its own PRB resource occupancy rate and a macro PRB resource occupancy rate.
  • the information used by the Pico to characterize the traffic volume is the PRB resource occupancy rate, and the Pico needs to know its own PRB resource occupancy rate and the macro PRB resource occupancy rate.
  • the PRB resource rate (PRB) rate specifies that the cell's own PRB resource occupancy rate is displayed every 100ms, indicating how much its own load is. Pico can know the PRB resource occupancy rate of itself and the Macro.
  • Step 302 The Pico performs resource allocation according to the acquired PRB resource occupancy rate and the macro PRB resource occupancy rate, and obtains the second resource allocation information.
  • Pico When Pico performs resource allocation, it can specifically determine whether to use time domain interleaving or frequency domain interleaving according to the Pico interfered uplink channel, that is, if Pico's PUCCH is interfered, Pico and Macro adopt time domain coordination and real time domain interleaving. To avoid interference, if Pico's PUSCH is interfered, Pico and Macro can use either time domain interleaving or frequency domain interleaving to avoid interference.
  • Pico determines the proportion of time domain coordinated null frames according to the usage rate of Macro and its own PRB resources, that is, which subframes are used by Macro to transmit information and the remaining subframes are empty subframes, and Pico uses the above. The remaining empty sub-frames are used to transmit information. For example, if Pico and Macro have the same PRB resource usage, a 1:1 ratio UL uplink time domain PUCCH null frame can be used. As shown in Figure 3b, the Macro uses subframes 1, 3, 5, 7, and 9 to transmit, and Pico uses subframes 0, 2, 4, 6, and 8 for transmission.
  • the proportion of the schedulable UL PUCCH can be appropriately increased.
  • the UL uplink time domain PUCCH null frame of the 1:2 ratio can be used.
  • the transmission is performed by subframes 1, 2, 3, and 4, and Pico is transmitted by subframes 5 and 6. If the PUCCH does not exist on the subframe, it is also counted in the allocated empty frame.
  • Pico and Macro can use different RBGs. Different RBs in the same RBG can be used, for example, as shown in Figure 3c, Pico uses RBG1, RBG2, Macro uses RGB3 and RGBn-2; or, in the same RBG, Pico uses RB1, Macro uses RB2.
  • the time domain interleaving is adopted, and it is determined that the Macro uses the subframes 1, 3, and 5 to transmit the uplink control information, and the Pico uses the other sub
  • the frame transmits uplink control information, and the UE sends uplink control information on subframes 1, 3, and 5.
  • a UE in the Macro cell only generates interference on the uplink data channel to the Pico cell
  • time domain interleaving it is determined that Macro uses subframes 1, 3, and 5 to transmit uplink data information
  • Pico uses other subframes to transmit uplink data information. Then, the UE sends uplink data information on subframes 1, 3, and 5; if frequency domain interleaving is used, it is determined that Macro uses RBG1 to transmit uplink data information, and Pico uses RBG2 to transmit uplink data information, then the UE uses RBG1 to send uplink data information. .
  • time domain coordination may be used to determine that Macro uses subframes 1, 3, and 5 to transmit uplink control/data information, and Pico uses other
  • the subframe transmits uplink control/data information, and the UE transmits uplink control/data information on subframes 1, 3, and 5.
  • the uplink control information sent by the UE can be transmitted only through the subframe 1, the uplink data information can also be frequency domain coordinated in other subframes such as subframes 2, 3, ....
  • Step 303 The Pico sends a resource interleave request including the second resource allocation information to the macro through the X2 interface between the base stations.
  • Pico can use String interaction to negotiate resource allocation, such as negotiating the ratio of UL null frames.
  • Step 304 The Pico receives the feedback information of the macro for the resource interlace request, where the feedback information includes the first resource allocation information.
  • the step 303 and the step 304 are the process of negotiating between the Pico and the Macro.
  • the first resource allocation information in the feedback information received by the Pico indicates whether the Macro allows the resource allocation in the second resource allocation information in the resource interleaving request.
  • Step 305 The Pico and the Macro perform resource scheduling according to the determined first resource allocation information.
  • the Pico and the Macro may allocate the information according to the second resource allocation information (the first resource allocation information is the same as the second resource allocation information)
  • the resource scheduling is performed, that is, the UE in the Pico cell and the UE in the Macro cell perform uplink control/data information transmission according to the allocated resources.
  • the Pico may repeat the resource allocation, and then repeatedly perform the above step 303 until the Macro allows its resource allocation, and then perform this step 304; or may be included in the feedback information by the Macro.
  • the first resource allocation information determined by the Macro (the first resource allocation information is different from the second resource allocation information at this time), Pico and Macro directly follow the Macro in the feedback message.
  • the determined first resource allocation information is used for resource scheduling.
  • Pico and Macro are used to negotiate resource allocation, and time domain coordination and/or frequency domain coordination realizes interleaving of uplink resources of UEs in the Pico cell and the Macro cell, and reduces uplink interference between UEs.
  • the Pico may also send a resource interlace request to the Macro directly through the X2 interface between the base stations after receiving the uplink interference, where the request does not include the second resource allocation information, and the Macro receives the
  • the resource allocation similar to step 302 is performed according to the PB resource occupancy rate of the Pico and the PRB resource occupancy rate of the Pico, and the first resource allocation information is obtained, and then the first resource allocation information is notified to the Pico through the feedback information.
  • Pico determines the resource allocation based on the feedback information.
  • Pico and Macro can perform resource scheduling according to the first resource allocation information.
  • the difference between this embodiment and the embodiment corresponding to Fig. 3 above is that the resource allocation is performed by the Macro, and Pico is passively accepted.
  • FIG. 4 it is a flowchart of a fifth embodiment of an uplink channel interference coordination method according to the present invention.
  • the first base station is Pico and the second base station is a Macro.
  • the Pico cell is subjected to uplink interference from the UE of the Macro cell.
  • the difference between this embodiment and the above embodiment is that, in this embodiment, there is no X2 interface between the Pico and the Macro base station, and the resource allocation is not directly determined by Pico or Macro, but is determined by a centralized node such as OSS or OAM.
  • the uplink channel interference coordination method may include:
  • Step 401 The Pico obtains its own PRB resource occupancy rate and the macro PRB resource occupancy rate. This step is the same as the steps of the previous embodiment.
  • Step 402 Pico sends a resource interlace request to the centralized node.
  • the resource interleaving request is used to request resource interleaving.
  • the resource interlace request may include the PRB resource occupancy rate of the Pico obtained by Pico in the previous step and the PRB resource occupancy rate of the Macro.
  • Step 403 The centralized node determines the resource allocation according to the PRB resource occupancy rate of the Pico and the PRB resource occupancy rate of the Macro, and obtains the first resource allocation information.
  • the process of the resource allocation by the centralized node according to the PB resource occupancy rate of the Pico and the Macro is similar to the step 302, and the description is not repeated here.
  • the centralized node informs Pico and Ma Cr0 of the resource allocation through feedback information.
  • the content of the first resource allocation information is the same as the content of the first resource allocation information in the foregoing embodiment.
  • Step 404 The Pico and the Macro respectively receive the first resource allocation information sent by the centralized node.
  • Pico and Macro receive the feedback information through the interface between each of them and the centralized node, respectively, and obtain The first resource allocation information included in the feedback information.
  • Step 405 The Pico and the Macro perform resource scheduling according to the first resource allocation information.
  • the above steps may be performed again to cause the centralized node to re-allocate resources.
  • the interference coordination method may not perform step 401, but the Pico directly performs step 402 when the interference is received, and the centralized node receives the resource interleaving request sent by the Pico, and then the centralized node Obtain the PRB resource occupancy rate of Pico and Macro, and allocate resources according to this.
  • the centralized node performs resource allocation for the Pico and the Macro, and the interleaving of the uplink resources of the UE in the Pico cell and the Macro cell is implemented by time domain coordination and/or frequency domain coordination, and the uplink interference between the UEs is reduced.
  • the resource allocation can still be completed through the centralized node 0SS or 0AM, which is different from the above embodiment in that the resource allocation is still by Pico or Macro is determined, and centralized nodes are only used to implement information transfer between Pico and Macro.
  • Pico determines the resource allocation according to the PB resource occupancy rate of the Pico and the PRB resource occupancy rate of the Macro, and then sends a resource interleaving request including the resource allocation to the Macro through the centralized node, and the Macro receives the request and then passes the centralized node to the Pico.
  • all the UEs in each base station may perform resource scheduling according to the foregoing resource allocation. However, not all UEs actually generate uplink interference to the neighboring area. If all the UEs participate in the resource scheduling, the resource is wasted. Therefore, after the first base station and the second base station determine the resource allocation in the foregoing embodiment, before the resource scheduling is performed on the UE according to the resource allocation, The step of identifying the UE that generates the uplink interference is included to perform resource scheduling only for the UE that generates the uplink interference.
  • the method for identifying the UE that generates the uplink interference may include: determining, according to the location of the UE and/or the signal strength of the uplink signal sent by the UE, whether the UE is a UE that generates uplink interference.
  • FIG. 5 it is a flowchart of a first embodiment of a method for identifying a UE that generates uplink interference.
  • the determining method determines, according to the location of the UE, whether the UE is a UE that generates uplink interference, and specifically includes: Step 501: Acquire an arrival angle and a timing advance of the UE.
  • the process of the base station acquiring the arrival angle and the timing advance of the UE can refer to the existing standards and methods, and details are not described herein.
  • Step 502 When the UE's arrival angle is less than or equal to the first threshold and/or the timing advance is less than or equal to the second threshold, determine that the UE is the UE that generates uplink interference.
  • the first threshold and the second threshold may be experimental values or empirical values, and may be determined according to interference conditions.
  • the MUE4 whose arrival angle AoA (angle of arrival) is 150 degrees and whose time advance is 300m is confirmed as a UE that does not generate uplink interference, and may not participate in the interference coordination of the present invention, but the AoA of the MUE3 is 60. Degree, 50m can not rule out whether it is interference with the UE, and the suspected interference UE will also participate in interference coordination.
  • the arrival angle and timing advance of MUE2 determine that it must interfere with the UE.
  • FIG. 7 a flow chart of a second embodiment of a method for identifying a UE that generates uplink interference is shown.
  • the determining method determines, according to the signal strength of the uplink signal sent by the UE, whether the UE is a UE that generates uplink interference, and specifically includes:
  • Step 701 Acquire a signal strength of an uplink signal of the UE.
  • the method may be: acquiring a Sounding Reference Signal (SRS) of the UE, demodulating the reference signal DMRS (Demodulation RS, DMRS) signal, and an uplink reference signal (Reference Signal, RS), where the RS includes an SRS for channel measurement ( Sounding RS) and signal strength for signal detection DMRS (Demodulation RS).
  • SRS Sounding Reference Signal
  • Step 702 When the signal strength of the uplink signal of the UE is greater than or equal to the third threshold, determine that the UE is a UE that generates uplink interference.
  • the third threshold may be an experimental value or an empirical value, and may be determined according to the interference situation.
  • the step 702 can be performed by the first base station or by the second base station, and the uplink signal of the UE can be transmitted by the first base station where the UE is located to the second base station through the interface X2 between the base stations.
  • the method for identifying the UE that generates the uplink interference may be performed in combination with steps 501-502 and 701 702, and may also identify the UE by using the MDT minimize drive test.
  • the first base station which is located by the first base station, is determined by the first base station to determine whether the UE is close to the location of the second base station to determine whether it generates interference power.
  • the foregoing steps identify the UEs that generate interference, and all UEs are prevented from participating in the foregoing resource scheduling, thereby avoiding waste of resources.
  • the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium, such as a ROM/RAM. , a diskette, an optical disk, etc., comprising instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or in certain portions of the embodiments.
  • a computer device which may be a personal computer, server, or network device, etc.
  • FIG. 8 is a schematic structural diagram of a first embodiment of a base station according to the present invention.
  • the base station can include:
  • the requesting unit 801 is configured to send a resource interlace request to the second base station or the centralized node, where the resource interleave request is used to request resource interleaving.
  • a first allocation determining unit 802 configured to receive first resource allocation information that is determined by the second base station or the centralized node according to the resource interleave request, where the first resource allocation information includes an uplink control channel of the base station Performing time domain interleaving with an uplink control channel of another base station, and/or performing uplink frequency data or time domain interleaving of the uplink data channel of the base station and the uplink data channel of the another base station;
  • the first resource scheduling unit 803 is configured to perform resource scheduling on the user equipment according to the first resource allocation information.
  • the requesting unit 801 of the base station sends a resource interleave request to another base station or a centralized node
  • the first allocation determining unit 802 receives the first resource allocation information of the another base station or the centralized node, and the first resource scheduling unit 803
  • the resource allocation may be performed on the user equipment according to the first resource allocation information, where the resource allocation may be that the uplink control channel of the base station is time-interleaved with the uplink control channel of another base station, and/or the uplink data channel of the base station is The uplink data channel of another base station is frequency domain interleaved.
  • the base station in the embodiment of the present invention implements interleaving with uplink resources of another base station by using time domain coordination and/or frequency domain coordination, and reduces uplink interference between the two base station cell UEs.
  • FIG. 9 is a schematic structural diagram of a second embodiment of a base station according to the present invention.
  • the base station may include a request unit 901, a first allocation determining unit 902, and a first resource scheduling unit.
  • an information acquisition unit 904 may also be included.
  • an allocation unit 905 may also be included.
  • a first identification unit 906 may also be included.
  • the information obtaining unit 904 is configured to acquire a physical resource block PRB resource occupancy rate of the base station and a PRB resource occupancy rate of the another base station before the requesting unit sends the resource interlace request.
  • the allocating unit 905 is configured to perform resource allocation according to the PRB resource occupancy ratio of the base station and the PRB resource occupancy rate of the another base station, to obtain second resource allocation information.
  • the resource interleave request sent by the requesting unit 901 includes the second resource component determined by the allocating unit 905. And the information, so that the second base station or the centralized node determines the first resource allocation information according to the second resource allocation information in the resource interlace request.
  • the first identifying unit 906 is configured to identify, before the first resource scheduling unit 903 performs resource scheduling on the uplink information of the user equipment according to the resource allocation, the user equipment that generates the uplink interference.
  • the first identifying unit 906 is specifically configured to determine, according to the location of the user equipment and/or the signal strength of the uplink signal sent by the user equipment, whether the user equipment is a user equipment that generates uplink interference.
  • the first resource scheduling unit 903 is specifically configured to perform resource scheduling on the user equipment that generates uplink interference according to the first resource allocation information.
  • the base station in the embodiment of the present invention implements interleaving of uplink resources with another base station by using time domain coordination and/or frequency domain coordination, reduces uplink interference between two base station cell UEs, and avoids identification by interfering UEs. All UEs participate in resource scheduling, saving resources.
  • FIG. 10 is a schematic structural diagram of a third embodiment of a base station according to the present invention.
  • the base station 100 can include a transceiver 1001, a memory 1002, and a processor 1003 coupled to the transceiver 1001 and the memory 1002, respectively:
  • the transceiver 1001 is configured to send a resource interlace request to a second base station or a centralized node, where the resource interleave request is used to request resource interleaving; and receive the second base station or the centralized node according to the resource interleave request Determining first resource allocation information, where the first resource allocation information includes an uplink control channel of the first base station and a time domain interlace of an uplink control channel of the second base station, and/or an uplink data channel of the first base station Performing frequency domain or time domain interleaving with the uplink data channel of the second base station;
  • a program code is stored in the memory 1002, and the processor 1003 is configured to call the memory
  • the program code stored in 1002 is configured to: perform resource scheduling on the user equipment according to the first resource allocation information.
  • the base station in the embodiment of the present invention implements interleaving with uplink resources of another base station by using time domain coordination and/or frequency domain coordination, and reduces uplink interference between the two base station cell UEs.
  • FIG. 11 is a schematic structural diagram of a fourth embodiment of a base station according to the present invention.
  • the base station can include:
  • the request receiving unit 1101 is configured to receive a resource interleave request of another base station, where the resource interleave request is used to request resource interleaving;
  • the second allocation determining unit 1102 is configured to determine, according to the resource interleave request, first resource allocation information, where the first resource allocation information includes an uplink control channel of the base station and a time domain interlace of an uplink control channel of another base station, where And/or an uplink data channel of the base station base station and an uplink data channel of the another base station Line frequency domain or time domain interleaving;
  • the second resource scheduling unit 1103 is configured to perform resource scheduling on the uplink information of the user equipment according to the resource allocation determined by the second allocation determining unit.
  • the base station may further include:
  • a second identifying unit configured to: after the second resource scheduling unit performs resource scheduling on the user equipment according to the first resource allocation information, identify a user equipment that generates uplink interference; the second identifying unit may be specifically used to:
  • the user equipment is determined to be a user equipment that generates uplink interference according to the location of the user equipment and/or the signal strength of the uplink signal sent by the user equipment.
  • the second resource scheduling unit is configured to perform resource scheduling on the user equipment that generates uplink interference according to the first resource allocation information.
  • the base station in the embodiment of the present invention implements interleaving with uplink resources of another base station by using time domain coordination and/or frequency domain coordination, and reduces uplink interference between the two base station cell UEs.
  • FIG. 12 it is a schematic structural diagram of a fifth embodiment of a base station according to the present invention.
  • the base station 120 can have a transceiver 1201, a memory 1202, and a processor 1203 coupled to the transceiver 1201 and the memory 1202, respectively:
  • the transceiver 1201 is configured to receive a resource interlace request of the first base station, where the resource interleave request is used to request resource interleaving;
  • a program code is stored in the memory 1202, and the processor 1203 is configured to invoke program code stored in the memory 1202 for performing the following operations:
  • the resource interleave request determining, by the resource interleave request, the first resource allocation information, where the first resource allocation information includes an uplink control channel of the first base station and an uplink control channel of the second base station, and/or the first The uplink data channel of the base station is interleaved with the uplink data channel of the second base station in frequency domain or time domain;
  • the base station in the embodiment of the present invention implements interleaving with uplink resources of another base station by using time domain coordination and/or frequency domain coordination, and reduces uplink interference between the two base station cell UEs.
  • FIG. 13 a schematic structural diagram of a first embodiment of a centralized device according to the present invention is shown.
  • the centralized device can include:
  • the request receiving module 1301 is configured to receive a resource interlace request, where the resource interleave request is used to request resource interleaving;
  • the information acquiring module 1302 is configured to acquire a resource resource occupancy rate and a second base of the physical resource block of the first base station.
  • the resource allocation module 1303 is configured to perform resource allocation according to the PRB resource occupancy rate of the first base station and the PRB resource occupancy rate of the second base station, to obtain first resource allocation information, where the first resource allocation information includes the The uplink control channel of the first base station is time-interleaved with the uplink control channel of the second base station, and/or the uplink data channel of the first base station is interleaved with the uplink data channel of the second base station in frequency domain or time domain;
  • An allocating and sending module 1304, configured to send the first resource allocation information to the first base station and/or the second base station, so that the first base station and/or the second base station according to the A resource allocation information performs resource scheduling on the user equipment.
  • the centralized device of the embodiment of the present invention implements interleaving of uplink resources of the two base stations by time domain coordination and/or frequency domain coordination, and reduces uplink interference between the two base station cell UEs.
  • FIG. 14 a schematic structural view of a second embodiment of a centralized device according to the present invention is shown.
  • the centralized device 140 can include a transceiver 1401, a memory 1402, and a processor 1403 coupled to the transceiver 1401 and the memory 1402, respectively:
  • the transceiver 1401 is configured to receive a resource interlace request, where the resource interleave request is used to request resource interleaving; and send the first resource allocation information to the first base station and/or the second base station, so that the first base station and/or the first base station and/or The second base station performs resource scheduling on the user equipment according to the first resource allocation information.
  • a program code is stored in the memory 1402, and the processor 1403 is configured to invoke program code stored in the memory 1402 to perform the following operations:
  • the first resource allocation information includes an uplink control channel of the first base station Performing time domain interleaving with the uplink control channel of the second base station, and/or uplink data channel of the first base station and frequency domain or time domain interleaving of the uplink data channel of the second base station.
  • the centralized device of the embodiment of the present invention implements interleaving of uplink resources of the two base stations by time domain coordination and/or frequency domain coordination, and reduces uplink interference between the two base station cell UEs.

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Abstract

La présente invention concerne un procédé de coordination d'interférences dans un canal de liaison montante et station de base. Ledit procédé de coordination d'interférences dans un canal de liaison montante consiste en ce que : une première station de base transmet une demande d'entrelacement de ressources à une seconde station de base ou à un nœud centralisé, la demande d'entrelacement de ressources servant à demander d'entrelacer des ressources; la première station de base reçoit les premières informations d'allocation de ressource déterminées par la seconde station de base ou le nœud centralisé selon la demande d'entrelacement de ressources, les premières informations d'allocation de ressources comprenant un entrelacement dans le domaine temporel entre le canal de contrôle de liaison montante de la première station de base et le canal de contrôle de liaison montante de la seconde station de base, et/ou un entrelacement dans le domaine fréquentiel et/ou dans le domaine temporel entre le canal de données de liaison montante de la première station de base et le canal de données de liaison montante de la seconde station de base; et la première station de base planifie les ressources pour un équipement d'utilisateur (UE) selon les premières informations d'allocation de ressource. Un mode de réalisation de la présente invention alloue des ressources à deux stations de base se brouillant mutuellement et réalise un entrelacement de ressources de liaison montante des UE dans les cellules des deux stations de base par une coordination du domaine temporel et/ou du domaine fréquentiel, réduisant de cette façon les interférences de liaison montante entre des UE.
PCT/CN2012/088139 2012-12-31 2012-12-31 Procédé de coordination d'interférences dans un canal de liaison montante et station de base WO2014101236A1 (fr)

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