WO2012171498A1 - 干扰协调方法和基站 - Google Patents

干扰协调方法和基站 Download PDF

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Publication number
WO2012171498A1
WO2012171498A1 PCT/CN2012/077052 CN2012077052W WO2012171498A1 WO 2012171498 A1 WO2012171498 A1 WO 2012171498A1 CN 2012077052 W CN2012077052 W CN 2012077052W WO 2012171498 A1 WO2012171498 A1 WO 2012171498A1
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WO
WIPO (PCT)
Prior art keywords
base station
power
specific channel
cell base
user equipment
Prior art date
Application number
PCT/CN2012/077052
Other languages
English (en)
French (fr)
Inventor
白伟
余政
蔺波
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.)
Filing date
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 EP12800587.3A priority Critical patent/EP2712231B1/en
Publication of WO2012171498A1 publication Critical patent/WO2012171498A1/zh
Priority to US14/109,536 priority patent/US9490946B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H04J11/0053—Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations

Definitions

  • Embodiments of the present invention relate to the field of wireless communications and, more particularly, to interference coordination methods and base stations.
  • the wireless communication system can provide wireless services such as voice and data.
  • a typical wireless communication system is a multiple access wireless system, wherein the base station transmits data and/or control information to the user equipment UE (User Equipment) on the downlink, and receives data of the user equipment on the uplink. And / or control information.
  • the user equipment transmits data and/or control information for the base station on the uplink and receives data and/or control information transmitted by the base station on the downlink.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced; Advanced Long Term Evolution
  • base stations of different types or different systems may be deployed in a homogeneous network, such as a base station with low transmission power (BS; Base Station) or a transmitting/receiving node, Micro BS. (micro base station), Pico BS (pseudo base station), Home BS (home base station), femto BS (indoor base station), Relay BS (relay base station), RRH (remote radio head; remote radio head), etc., to enhance the network Coverage and performance, such a network structure is called a heterogeneous network.
  • a large transmit power base station such as a macro base station, or a macro eNodeB or MeNB
  • a low transmit power base station low power base station
  • the LPN configurable uplink and/or downlink spectrum resources are fully or partially spectrally multiplexed with the MeNB configurable uplink and/or downlink spectrum resources.
  • the LPN (or LPN service) Co-channel or co-channel interference occurs between the downlink channel or the uplink channel transmission of the UE and the MeNB (or the UE of the MeNB).
  • the interference affects the reliability of the downlink channel transmission and the uplink channel detection of the LPN and the MeNB, and the channel includes a control channel and a data channel.
  • the LTE-A standard adopts the method of Time Division Multiplexing (TDM) (Time Division Multiplexing) ICIC (Inter Cell Interference Coordination) to deal with interference between cells in a heterogeneous network scenario.
  • TDM Time Division Multiplexing
  • ICIC Inter Cell Interference Coordination
  • the aggressor cell base station (which may be a macro base station or an LPN base station) sets certain channel resources to low transmission power or no traffic transmission (ie, the transmission power of the service is zero).
  • An example of such a specific channel resource is an approximate null subframe. (ABS: Almost Blank Subframe) resources.
  • the aggressed cell base station (which may be an LPN base station or a macro base station) schedules a UE that is strongly interfered by the aggressor cell base station to perform a service transmission on a subframe corresponding to the ABS subframe configured by the aggressor cell base station, thereby ensuring that the victim station is victimized by the victim station. Transmission performance.
  • the transmission power on the ABS subframe is not coordinated between the aggressor cell base station and the aggressed cell base station, when the aggressor cell base station sets the transmission power on the ABS subframe to be low, there may be almost no UE capable of invading the cell.
  • the base station schedules traffic transmission on the ABS subframe, thereby reducing available transmission resources.
  • the aggressor cell base station schedules the ABS subframe to its own UE to increase the transmission resource, it may still cause the UE to the victim cell base station due to the inappropriate setting of the transmission power on the ABS subframe. Causes strong interference.
  • the embodiments of the present invention provide an interference coordination method and a base station, which can reduce interference between base stations.
  • An aspect of the present invention provides an interference coordination method, including: determining an interference level of an aggressor cell base station and the aggressor cell base station, and receiving power coordination information sent by the aggressor cell base station, where the power coordination information is used to indicate the Determining a power adjustment margin of the cell base station on a specific channel resource or indicating a minimum transmission power of the aggressor cell base station on a specific channel resource; determining the intrusion according to the interference level of the aggressor cell base station and the power coordination information a base station in the cell base station that needs to perform interference coordination; and sending, to the base station that needs to perform interference coordination, a power adjustment request, so that the base station that needs to perform interference coordination adjusts the transmission power on the specific channel resource.
  • an interference coordination method including: transmitting a power coordination signal to a neighboring base station
  • the power coordination information is used to indicate a power adjustment margin of the aggressor cell base station on a specific channel resource or a minimum transmission power indicating the aggressor cell base station on a specific channel resource; and receiving the neighboring cell base station according to the power Coordinating a power adjustment request for information transmission; adjusting transmission power on the specific channel resource according to the power adjustment request.
  • a method for transmitting a measurement report including: learning, a current transmission power of a user base station of a user equipment on a specific channel resource, or performing data transmission between the user equipment and the aggressor cell base station a path loss is sent to the serving base station of the user equipment, where the measurement 4 carries the current transmission power on the specific channel resource, or the measurement 4 carries the path loss and the The user equipment receives the received power of the reference signal, so that the serving base station determines the current transmission power of the aggressor cell base station of the user equipment according to the measurement report.
  • an interference coordination method including: receiving, by a user equipment, a power adjustment margin of the user equipment on a specific channel resource; and transmitting power coordination information to a serving base station of the user equipment that generates the interference, where
  • the power coordination information includes the power adjustment margin or the power coordination information including the power adjustment margin and resource indication information of the specific channel resource, so that the serving base station adjusts the interference generated according to the power coordination information.
  • the transmission power of the user equipment on the specific channel resource including: receiving, by a user equipment, a power adjustment margin of the user equipment on a specific channel resource; and transmitting power coordination information to a serving base station of the user equipment that generates the interference, where
  • the power coordination information includes the power adjustment margin or the power coordination information including the power adjustment margin and resource indication information of the specific channel resource, so that the serving base station adjusts the interference generated according to the power coordination information.
  • an interference coordination method including: receiving, by a second base station, power coordination information sent by a first base station, where the power coordination information is reported by the first base station according to a user equipment of the first base station Generating a power adjustment margin on a specific channel resource, where the power coordination information includes the power adjustment margin or the power coordination information includes the power adjustment margin and resource indication information of the specific channel resource, where The user equipment of the second base station generates interference on the user equipment of the first base station on the specific channel resource; the second base station adjusts, according to the power coordination information, the user equipment of the second base station on the specific channel The transmission power on the resource.
  • a base station device including: an identifying unit, configured to determine an interference level of a rogue cell base station and the aggressor cell base station; and a receiving unit, configured to receive power coordination information sent by the aggressor cell base station, where The power coordination information is used to indicate that the aggressor cell base station is specific a power adjustment margin on the channel resource or a minimum transmission power indicating the aggressor cell base station on the specific channel resource; a determining unit, configured to determine, according to the interference unit, the interference level of the aggressor cell base station and the receiving unit Determining, by the power coordination information, a base station that needs to perform interference coordination in the aggressor cell base station, and a requesting unit, configured to send, to the base station that needs to perform interference coordination, the power adjustment request, to enable the interference coordination The base station adjusts the transmission power on the particular channel resource.
  • a base station including: a sending unit, configured to send power coordination information to a neighboring base station, where the power coordination information is used to indicate a power adjustment margin of a base station on a specific channel resource or to indicate the base station a minimum transmission power on a specific channel resource; a receiving unit, configured to receive a power adjustment request sent by the neighboring base station according to the power coordination information; and an adjusting unit, configured to adjust according to a power adjustment request received by the receiving unit Transmission power on the particular channel resource.
  • a base station including: a receiving unit, configured to receive a power adjustment margin of the user equipment reported by a user equipment on a specific channel resource; and a generating unit, configured to receive, according to the receiving unit, The power adjustment margin generates power coordination information, where the power coordination information includes the power adjustment margin or the power coordination information includes the power adjustment margin and resource indication information of the specific channel resource; Transmitting the power coordination information generated by the generating unit to the serving base station of the user equipment that generates the interference, so that the serving base station adjusts the transmission power of the user equipment that generates the interference on the specific channel resource according to the power coordination information.
  • a base station including: a receiving unit, configured to receive power coordination information sent by a first base station, where the power coordination information is reported by the first base station according to a user equipment served by the first base station Generating a power adjustment margin on a specific channel resource, where the power coordination information includes the power adjustment margin or the power coordination information includes the power adjustment margin and resource indication information of the specific channel resource,
  • the user equipment of the base station generates interference on the user equipment of the first base station on the specific channel resource
  • the adjusting unit is configured to adjust, according to the power coordination information received by the receiving unit, the user equipment of the base station Transmission power on the particular channel resource.
  • a user equipment including: a learning unit, configured to learn, a current transmission power of a rogue cell base station of a user equipment on a specific channel resource, or between the user equipment and the aggressor cell base station a path loss for data transmission; a reporting unit, configured to send a measurement report to a serving base station of the user equipment, where the measurement report carries current transmission power on a specific channel resource learned by the learning unit, or the measurement report The path loss learned by the learning unit and the received power of the reference signal received by the user equipment are performed, so that the serving base station determines the current transmission power of the aggressor cell base station of the user equipment according to the measurement report.
  • the base station base station transmits power coordination information about the specific channel resource to the victim cell base station, and adjusts the transmission power on the specific channel resource based on the adjustment request generated by the victim cell base station based on the power coordination information, thereby reducing the specific The interference to the victim cell base station on the channel resource, and the aggressor cell base station can still use the specific channel resource for service transmission, thereby improving the system capacity.
  • 1 is a schematic diagram of an example of a scenario of inter-base station interference coordination.
  • FIG. 2 is a flow chart of an interference coordination method in accordance with an embodiment of the present invention.
  • FIG. 3 is a flow chart of an interference coordination method in accordance with another embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of an interference adjustment process in accordance with one embodiment of the present invention.
  • FIG. 5 is a schematic flow chart of an interference coordination process according to another embodiment of the present invention.
  • FIG. 6 is a block diagram of a base station in accordance with one embodiment of the present invention.
  • FIG. 7 is a block diagram of a base station in accordance with another embodiment of the present invention.
  • FIG. 8 is a block diagram of a base station according to another embodiment of the present invention.
  • FIG. 9 is a schematic flow chart of a method of transmitting a measurement report according to an embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of a user equipment according to an embodiment of the present invention.
  • 11 is a schematic flow chart of an interference coordination method according to another embodiment of the present invention.
  • FIG. 12 is a schematic flow chart of an interference coordination method according to another embodiment of the present invention.
  • FIG. 13 is a schematic flow chart of an interference coordination process according to another embodiment of the present invention.
  • Figure 14 is a schematic block diagram of a base station in accordance with an embodiment of the present invention.
  • Figure 15 is a schematic block diagram of a base station in accordance with an embodiment of the present invention.
  • the embodiments of the present invention are applicable to a wireless communication system, particularly an LTE/LTE-A wireless communication system.
  • the specific embodiment of the present invention will be described below by taking the present invention as an example of application to an LTE/LTE-A wireless communication system.
  • embodiments of the invention are not limited to this particular wireless communication system. It should be noted that the concept of a base station may be equivalent to a cell under the premise of ambiguity in this document.
  • the transmission resource may be increased.
  • a specific channel resource for example, an ABS resource
  • FIG. 1 is a schematic diagram of an example of a scenario of inter-base station interference coordination.
  • FIG. 1 illustrates a schematic diagram of a TDM ICIC performed by a Macro eNB and a Pico eNB within its coverage.
  • the Macro eNB may set certain subframes as ABS subframes in consideration of interference protection of the Pico eNB by the Macro eNB. As shown in FIG.
  • 101 denotes a macro base station
  • 201 to 202 denote low-power base stations (such as Pico eNB); 301-307 denote user equipment; 401-405 denote coverage of a base station, where 401 denotes 101
  • the coverage on the non-ABS subframe 402 indicates the coverage of the subframe on the subframe corresponding to the non-ABS subframe of the Macro eNB
  • 404 indicates the coverage of the subframe on the subframe corresponding to the non-ABS subframe of the Macro eNB
  • 403 indicates Covering range of 201 on the subframe corresponding to the Macro eNB ABS subframe
  • 405 indicating the coverage of 202 on the subframe corresponding to the Macro eNB ABS subframe.
  • 101 since the transmission power of 101 is relatively large, the transmission of 101 may cause interference to 201 ⁇ 202.
  • 101 is To reduce the interference to 201 ⁇ 202, 101 sets some subframes as ABS, and 101 does not perform traffic scheduling on the ABS (ie, the data transmission power on the ABS is 0). Therefore, 101 can only schedule data for its own UE 301-303 on non-ABS subframes.
  • the 101 can set the appropriate transmission power on the ABS, so that the transmission of the 101 on the ABS does not cause serious interference to the 201-202.
  • 406 is the coverage of base station 101 on the ABS.
  • the transmission of 101 on the ABS does not interfere with the transmission of 201 ⁇ 202 (or the reception of 304, 307), so the base station 101 can schedule the user equipments 301 and 302 to perform service transmission on the ABS, thereby increasing the capacity of the system.
  • the aggressor cell base station can still use the ABS for the service of the own UE while reducing the interference to the victim cell base station. Transfer, thereby increasing the capacity of the system.
  • the aggression cell base station sets the transmission power on the ABS subframe, it is necessary to consider the location and number of the victim cell base station or the victim UE around the cell base station, and ensure the system capacity and the service demand of the UE being served by itself. Set the coverage on the ABS subframe to reduce the interference of the aggressor cell base station to the victim cell base station or the victim UE.
  • the present invention provides a method for inter-base station interference coordination, which is used to ensure that the aggressor cell base station sets appropriate transmission power on the ABS, reduces interference to the victim cell base station, and still enables the aggressor cell base station. Traffic is transmitted on the ABS to increase system capacity.
  • FIG. 2 is a flow chart of an interference coordination method in accordance with an embodiment of the present invention. The method of Figure 2 is performed by a victim cell base station.
  • the base station base station transmits power coordination information about the specific channel resource to the victim cell base station, and adjusts the transmission power on the specific channel resource based on the adjustment request generated by the victim cell base station based on the power coordination information, thereby reducing the specific The interference to the victim cell base station on the channel resource, and the aggressor cell base station can still use the specific channel resource for service transmission, thereby improving the system capacity.
  • FIG. 3 is a flow chart of an interference coordination method in accordance with another embodiment of the present invention.
  • the method of Figure 3 is performed by an aggressor cell base station.
  • the base station base station transmits power coordination information about the specific channel resource to the victim cell base station, and adjusts the transmission power on the specific channel resource based on the adjustment request generated by the victim cell base station based on the power coordination information, thereby reducing the specific
  • the interference to the victim cell base station on the channel resource, and the aggressor cell base station can still use the specific channel resource for service transmission, thereby improving the system capacity.
  • Embodiments of the present invention are described in more detail below with reference to specific examples. It should be noted that in the following embodiments of the present invention, power coordination between base stations is performed for transmission power on ABS resources (an example of a specific channel resource).
  • the ABS resource may be granular to the entire frequency band on the ABS subframe. In an actual system, in order to achieve finer power coordination results, embodiments of the present invention may similarly For finer power coordination granularity, for example, adjusting the frequency carrier of the frequency domain occupied by the ABS resource, the physical resource block of the frequency domain occupied by the ABS resource, or the transmission power of the resource block group of the frequency domain occupied by the ABS resource. For example, a single or multiple physical resource blocks may be employed as the granularity of power coordination.
  • the specific channel resource in the embodiment of the present invention is not limited to the ABS resource described below, and may also be applied to other types of channel resources, such as a flexible subframe resource.
  • the subframe type of the flexible subframe can be changed, and it is used as an uplink subframe for a certain period of time and as a downlink subframe for another period of time.
  • the power coordination information is used to indicate the power adjustment margin of the aggressor cell base station on a particular channel resource.
  • the power adjustment margin of the aggressor cell base station on the specific channel resource includes the difference between the current transmission power and the minimum transmission power of the aggressor cell base station on the specific channel resource.
  • the minimum transmit power may be configured by the network to the base station. Further, the value of the minimum transmit power may be determined according to a system network plan.
  • the aggressor cell base station learns the current transmission power and the minimum transmission power on the ABS resource. In order to make the service requirements of the UE that interferes with the base station's own service and the capacity of the network system, it is not because
  • the setting of the ABS resource has a great influence, and the aggressor cell base station can set a minimum transmit power Power_min decibel (dB) on the ABS resource.
  • the minimum transmission power of the aggressor cell base station is usually a value determined in the network planning and network optimization phase, and is configured by the network to the base station.
  • the minimum transmit power may be set according to the size of the different coverage areas and the link budget of the victim cell base station and the victim cell base station on different subframe types (ABS resources or non-ABS resources).
  • the intrusion cell base station can also semi-statically adjust the setting of the minimum transmit power on the ABS resource through a mechanism of a self-organizing network or a self-optimizing network.
  • the aggressor cell base station obtains a difference between a current transmission power and a minimum transmission power on the ABS resource.
  • Power adjustable interval Power_c - Power_min
  • the power adjustable section information may indicate a power adjustable section of the aggressor cell base station by means of bit indication. If the maximum transmit power of the aggressor cell base station on the ABS subframe is assumed to be Power_max decibel (dB), the range of the maximum power adjustable interval is:
  • the Ceil (Log2) bit can be used to indicate the power adjustable interval.
  • Ceil (Log2) log2 (maximum power adjustable interval / A) bits are required for the indication of the power adjustable interval.
  • Ceil(x) means rounding up X.
  • the power adjustable interval information includes two indication fields IE1 and IE2. Where IE1 is used to indicate the specific value of the indicated step size, and IE2 is used to indicate a specific value within a certain indication range. The value of the power adjustable interval is ⁇ 1 ⁇ 2.
  • the aggressor cell base station sends a power adjustment margin (or a power adjustable interval) to the victim cell base station.
  • the aggressor cell base station transmits a power adjustable interval to the neighboring neighbor base station or the adjacent victim cell base station periodically or event-triggered.
  • the aggressor cell base station transmits the power adjustable section information (a bit field for indicating a power adjustable interval, and/or a field indicating an indication step of the power adjustable interval) through an X2 interface, or an S1 interface, or an interface such as an air interface.
  • the aggressor cell base station may send a load indication (load indication) information to the victim cell base station, and carry the power adjustable section information in the load indication information.
  • load indication load indication
  • the power adjustable section information ABS Power Adjustment Range Info on the ABS resource may be included in the information element (IE: Information Element) of the ABS information in the load indication.
  • IE Information Element
  • the power adjustable interval information ABS Power Adjustment Range Info on the ABS resource may be included in the IE of the Load indication.
  • the victim cell base station learns the interference level of the aggressor cell base station and the aggressor cell base station.
  • the victim cell base station can measure the aggressor cell base station and its interference level by itself.
  • the victim cell base station can learn the affected cell base station and its interference level according to the measurement report reported by the user equipment, and the UE of the victim cell base station reports the measured reference signal reception power (RSRP: Reference signal reception power) of the neighboring cell and/or The reference signal reception quality (RSRQ: Reference signal reception quality)fensiv
  • RSRP Reference signal reception power
  • RSRQ Reference signal reception quality
  • the edge UE can refer to the UE that is at the edge of the cell coverage in the geographical range, and can also refer to the signal quality of the UE in all the UEs.
  • the interference of the UE in the low-interval section is large, and the neighboring base stations have little influence on the interference of the edge UE of the victim cell base station, so that the victim cell base station recognizes the interference level of the aggressor cell base station (for example, strong Interfering base station and weak interfering base station).
  • 44 can be executed after 41-43, or before 41-43, or in parallel with 41-43 as shown in Figure 4. These variations are all within the scope of embodiments of the invention.
  • the victim cell base station determines the base station that needs to perform interference coordination according to the power coordination information received in 43 (in this example, the power coordination information is power adjustable interval information) and the interference level of the aggressor cell base station determined in 44.
  • the power coordination information is power adjustable interval information
  • the victim cell base station can identify the strong interfering base station and the weak interfering base station according to the value (or distribution) of the RSRP and/or RSRQ reported by the UE served by the victim cell base station. Further, the victim cell base station can learn the power adjustable range of the neighboring base station according to the power adjustable section information on the ABS resource notified by the neighboring base station.
  • the base station of the victim cell according to the identified interference level of the aggressed cell base station (for example, the strong interfering base station and the weak interfering base station information), the learned power adjustable range information of the neighboring base station (ie, the power adjustment margin of the aggressor cell base station),
  • the aggressor cell base station performs sorting, and determines the base station that needs to perform interference coordination according to the sorted result. For example, the victim cell base station may preferentially send a power adjustment request to the highest priority aggressor cell base station in order of priority from high to low. If the highest priority aggressor cell base station has reduced the transmission power on the ABS resource to the minimum transmission power, the performance of the edge UE of the victim cell base station still cannot meet the reliable connection.
  • the victim cell base station may continue to send a power adjustment request to the next priority attacked cell base station in descending order.
  • the victim cell base station may also determine other rules for sending power adjustment requests, such as simultaneously transmitting power adjustment requests to several high priority aggressor cell base stations.
  • the criterion for the ordering may be: strong interfering base station, and when the power adjustable interval of the strong interfering base station is large, the strong interfering base station has the highest priority; when the strong interfering base station is strong, and the power adjustable interval of the strong interfering base station is moderate, The strong interfering base station has a medium priority; the strong interfering base station, and the strong interfering base station has a low power priority interval, the strong interfering base station has a low priority; the low interfering base station, and the low interfering base station power adjustable interval When it is large, the strong interfering base station has a lower priority; when the low-interfering base station has a lower power-adjustable interval, the strong interfering base station has the lowest priority.
  • the victim cell base station sends a power adjustment request to the base station determined by 45 to perform interference coordination. For example, the victim cell base station preferentially transmits a power adjustment request to the highest priority aggressor cell base station according to the result of the sorting in the above 45.
  • the content of the power adjustment request information may be a relative amplitude value that the victim cell base station desires to invade the cell base station power adjustment (ie, an adjustment range relative to the current transmission power of the aggressor cell base station), or may be that the victim cell base station desires to invade the cell base station power adjustment.
  • the absolute amplitude value ie, the victim cell base station expects to invade the transmission power value of the cell base station.
  • the indication of the power adjustment request information can be similarly followed by the indication method of the power adjustable section information, and details are not described herein again.
  • the victim cell base station may send the Load indication information to the aggressor cell base station, and carry the power adjustment request in the Load indication information.
  • the power adjustment request can be transmitted to the aggressor cell base station through an X2 interface, or an S1 interface, or an air interface.
  • the aggressor cell base station After receiving the power adjustment request sent by the victim cell base station, the aggressor cell base station adjusts the transmission power on the ABS resource according to the power adjustment request. For example, the aggressor cell base station adjusts the transmission power on the ABS resource within the power adjustment range allowed by the base station.
  • the process of power coordination between the above base stations may be an iterative (ie, cyclic repetition) process.
  • the aggressor cell base station can perform the above-mentioned power coordination with the victim cell base station multiple times.
  • the base station of the aggressor cell is guaranteed to have a minimum transmit power on the ABS resource, and the base station of the victim cell is also guaranteed.
  • the service on the ABS resource is reliably transmitted.
  • FIG. 5 is a schematic flow chart of an interference coordination process according to another embodiment of the present invention.
  • the power coordination information is used to indicate the minimum transmission power of the aggressor cell base station on a particular channel resource.
  • the aggressor cell base station determines a minimum transmission power on the ABS resource.
  • the minimum transmit power of the aggressor cell base station is usually a value determined during the network planning and network optimization phase, and is configured by the network to the base station.
  • the minimum transmit power may be set according to the size of the different coverage areas and the link budget (Link Budget) of the aggressor cell base station and the victim cell base station on different subframe types (ABS resources or non-ABS resources).
  • the aggressor cell base station may also semi-statically adjust the setting of the minimum transmit power on the ABS resource through a mechanism of a self-organizing network or a self-optimizing network.
  • the aggressor cell base station generates power coordination information including a minimum transmission power on the ABS resource.
  • the aggressor cell base station transmits the minimum transmission power information to the victim cell base station.
  • the method of transmitting the minimum transmission power information can be referred to 43, and therefore will not be described again.
  • the base station of the victim cell receives the measurement report reported by the user equipment, where the measurement report carries the RSRP and/or RSRQ of the neighboring cell measured by the UE of the victim cell base station.
  • the measurement report further carries the current transmission power information of the aggressor cell base station, or carries the received power of the reference signal received by the user equipment and the path loss information between the user equipment and the aggressor cell base station.
  • the victim cell base station determines the interference level of the aggressor cell base station and the aggressor cell base station according to the measurement report reported by the user equipment. In addition, the victim cell base station obtains the current transmission power information or path loss information of the aggressor cell base station in the measurement report.
  • the user equipment may carry information (e.g., RSRP and/or RSRQ) and current transmission power information or path loss information for determining interference levels in the same measurement report. The user equipment can also separately transmit information for determining the interference level and current transmission power information or path loss information in different measurements.
  • the current ABS resource transmission power information or path loss information of the aggressor cell base station may be Obtained from the measurement report reported by the user equipment.
  • the measurement report of the user equipment also needs to include the current ABS resource transmission power information or the path loss information of the aggressor cell base station (that is, the path loss value of the aggressor cell base station to the user equipment).
  • the UE obtains the current by measuring the pilot signal of the aggressor cell base station (ie, a reference signal, such as a cell-specific reference signal, or a user equipment-specific reference signal, or a demodulation reference signal, or a channel state information reference signal) or reading system information.
  • a reference signal such as a cell-specific reference signal, or a user equipment-specific reference signal, or a demodulation reference signal, or a channel state information reference signal
  • ABS resource transmission power or path loss may be similarly performed according to the indication method described in FIG. 43, and details are not described herein again.
  • the victim cell base station according to the power coordination information received in 53 (in this example, the power coordination information is the minimum transmission power information) and the interference level of the aggressor cell base station determined in 55 and the current ABS resource transmission of the dry aggressor cell base station
  • the power information or the path loss information determines the base station that needs to perform interference adjustment.
  • the victim cell base station obtains the power adjustable section information of the interfering base station according to the current ABS resource transmission power information and the minimum transmission power information of the learned aggressor cell base station. That is, the power adjustable interval is equal to the difference between the current ABS resource transmission power and the minimum transmission power information.
  • the base station that needs to perform interference coordination may be determined according to the method similar to that described in FIG. 45, and details are not described herein again.
  • the victim cell base station obtains power adjustable section information of the aggressor cell base station according to the minimum transmission power information and the received power of the reference signal received by the user equipment and the path loss information between the user equipment and the aggressor cell base station.
  • the base station of the victim cell i.e., the serving base station of the user equipment
  • the power adjustable interval is equal to the difference between the current transmission power and the minimum transmission power information.
  • the victim cell base station sends a power adjustment request to the base station determined by 55 to perform interference coordination.
  • the transmission method of 57 can be referred to 46, and therefore will not be described again.
  • the power adjustment request is performed to adjust the transmission power on the ABS resource.
  • the method of adjusting the transmission power refer to
  • the process of power coordination between the above base stations may be an iterative (ie, cyclic repetition) process.
  • the aggressor cell base station can perform the foregoing power coordination with the victim cell base station multiple times, and ensure the minimum transmit power of the aggressor cell base station on the ABS resource, and also ensure reliable transmission of the service of the victim cell base station on the ABS resource.
  • the aggressor cell base station can still use the ABS resource for the service transmission of the own UE while reducing the interference to the victim cell base station, thereby improving the system's valley.
  • FIG. 6 is a block diagram of a base station device in accordance with one embodiment of the present invention.
  • the base station 60 of Fig. 6 includes an identification unit 61, a receiving unit 62, a determining unit 63, and a requesting unit 64.
  • the identification unit 61 learns the interference level of the aggressor cell base station and the aggressor cell base station.
  • the receiving unit 62 receives the power coordination information sent by the aggressor cell base station, where the power coordination information is used to indicate a power adjustment margin of the aggressor cell base station on a specific channel resource or to indicate that the aggressor cell base station is on a specific channel resource. Minimum transmission power.
  • the determining unit 63 determines the base station in the aggressor cell base station that needs to perform interference coordination based on the interference level of the aggressor cell base station determined by the identification unit 61 and the power coordination information received by the receiving unit 62.
  • the requesting unit 64 sends a power adjustment request to the base station that needs to perform interference coordination, so that the base station that needs to perform interference coordination adjusts the transmission power on the specific channel resource.
  • the base station base station transmits power coordination information about the specific channel resource to the victim cell base station, and adjusts the transmission power on the specific channel resource based on the adjustment request generated by the victim cell base station based on the power coordination information, thereby reducing the specific The interference to the victim cell base station on the channel resource, and the aggressor cell base station can still use the specific channel resource for service transmission, thereby improving the system capacity.
  • An example of the base station 60 of Figure 6 is the victim cell base station of Figure 4 or Figure 5 and performs the corresponding operations of the victim cell base station.
  • the power coordination information received by the receiving unit 62 is used to indicate that the aggressor cell base station is specific.
  • the power adjustment margin on the channel resource includes a difference between a current transmission power and a minimum transmission power of the aggressor cell base station on the specific channel resource.
  • the determining unit 63 sorts the aggressor cell base stations according to the interference level of the aggressor cell base station and the power adjustment margin, and determines the base station that needs to perform interference coordination according to the sequenced result.
  • the receiving unit 62 is further configured to receive, by the user equipment, the aggressor cell base station at the specific The current transmission power information on the channel resource, or the received power of the user equipment receiving the reference signal and the path loss information between the user equipment and the aggressor cell base station.
  • the determining unit 63 acquires the power adjustable section information of the aggressor cell base station according to the minimum transmission power information and the current transmission power information received by the receiving unit 62, or according to the minimum transmission power information received by the receiving unit 62.
  • the specific channel resource may be an ABS resource.
  • the ABS resource may be granular in the entire frequency band on the ABS subframe or a finer granularity.
  • the requesting unit 64 may enable the base station that needs to perform interference coordination to adjust the transmission power on the ABS resource, the transmission power on the sub-carrier in the frequency domain occupied by the ABS resource, and the transmission on the physical resource block in the frequency domain occupied by the ABS resource.
  • the requesting unit 64 may send the load indication information to the base station that needs to perform interference coordination, and carry the power adjustment request in the load indication information.
  • FIG. 7 is a block diagram of a base station device according to another embodiment of the present invention.
  • the base station 70 of Fig. 7 includes a transmitting unit 71, a receiving unit 72, and an adjusting unit 73.
  • the transmitting unit 71 transmits power coordination information power coordination information to the neighboring base station to indicate the power adjustment margin of the base station 70 on the specific channel resource or the minimum transmission power of the base station 70 on the specific channel resource.
  • the receiving unit 72 receives a power adjustment request sent by the neighboring base station according to the power coordination information.
  • the adjusting unit 73 adjusts the specific channel according to the power adjustment request received by the receiving unit 72. The transmission power on the resource.
  • the base station base station transmits power coordination information about the specific channel resource to the victim cell base station, and adjusts the transmission power on the specific channel resource based on the adjustment request generated by the victim cell base station based on the power coordination information, thereby reducing the specific The interference to the victim cell base station on the channel resource, and the aggressor cell base station can still use the specific channel resource for service transmission, thereby improving the system capacity.
  • An example of the base station 70 of Fig. 7 is the aggressor cell base station of Fig. 4 or Fig. 5, and performs corresponding operations of the aggressor cell base station.
  • FIG. 8 is a block diagram of a base station according to another embodiment of the present invention.
  • the base station 80 of Fig. 8 includes the transmitting unit 71, the receiving unit 72, and the adjusting unit 73 shown in Fig. 7.
  • base station 80 also includes learning unit 81 and generating unit 82.
  • the power adjustment margin of the aggressor cell base station on the specific channel resource includes the aggressor cell base station.
  • the learning unit 81 knows the current transmission power and the minimum transmission power on the specific channel resource.
  • the generating unit 82 obtains a difference between the current transmission power and the minimum transmission power on the specific channel resource as a power adjustment margin, and generates power coordination information indicating the power adjustment margin.
  • the learning unit 81 learns the minimum transmission power on the specific channel resource.
  • the generating unit 82 generates power coordination information for indicating a minimum transmission power on a specific channel resource.
  • the specific channel resource may be an ABS resource.
  • the ABS resource may be granular in the entire frequency band on the ABS subframe, or a finer granularity may be employed.
  • the adjusting unit 73 may adjust, according to the power adjustment request, the transmission power on the ABS resource, the transmission power on the subcarrier in the frequency domain occupied by the ABS resource, the transmission power on the physical resource block in the frequency domain occupied by the ABS resource, or The transmission power on the resource block group of the frequency domain occupied by the ABS resources.
  • the sending unit 71 may send the load indication information to the neighboring base station, where the power coordination information is carried in the load indication information.
  • FIG. 9 is a schematic flow chart of a method of transmitting a measurement report according to an embodiment of the present invention. The method of Figure 9 is performed by the user equipment.
  • the measurement report is sent to the serving base station of the user equipment, where the measurement report carries the current transmission power on the specific channel resource, or the measurement report carries the path loss and the user equipment receives the reference signal. Receiving power, so that the serving base station determines a current transmission power of the aggressor cell base station of the user equipment according to the measurement report.
  • the method of FIG. 9 is applicable to the embodiment of FIG. 5 (process 54), and reports the current transmission power or path loss of the aggressor cell base station on the ABS resource to the victim cell base station, so that the victim cell base station can report the ABS resource according to the user equipment.
  • the current transmission power or path loss on the uplink combined with the minimum transmission power information received by the victim cell base station from the aggressor cell base station, obtains the current transmission power of the aggressor cell base station on the ABS resource. Therefore, the victim cell base station can obtain the power adjustable interval of the aggressor cell base station on the ABS resource, and generate a power adjustment request according to the power adjustable interval, and request the aggressor cell base station to adjust the transmission power on the ABS resource.
  • the serving base station when the measurement report carries the path loss information and the received power of the reference signal received by the user equipment, the serving base station receives the path loss and the user equipment The received power of the reference signal is summed with the current transmission power of the aggressor cell base station of the user equipment.
  • FIG. 10 is a schematic block diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment 100 of FIG. 10 includes a learning unit 110 and a reporting unit 120.
  • the learning unit 110 learns the current transmission power of the aggressor cell base station of the user equipment 100 on a specific channel resource, or the path loss of data transmission between the user equipment 100 and the aggressor cell base station.
  • the reporting unit 120 sends a measurement report to the serving base station of the user equipment 100, where the measurement report carries the current transmission power on the specific channel resource learned by the learning unit 110, or the measurement report.
  • the message carries the path loss learned by the learning unit 110 and the received power of the reference signal received by the user equipment 100, so that the serving base station determines the current transmission power of the aggressor cell base station of the user equipment 100 according to the measurement report.
  • the user equipment 100 of FIG. 10 is applicable to the embodiment of FIG. 5 (process 54), and reports the current transmission power or path loss of the aggressor cell base station on the ABS resource to the victim cell base station, so that the victim cell base station can report according to the user equipment.
  • the current transmission power or path loss on the ABS resource combined with the minimum transmission power information received by the victim cell base station from the aggressor cell base station, obtains the current transmission power of the aggressor cell base station on the ABS resource. Therefore, the victim cell base station can obtain the power adjustable interval of the aggressor cell base station on the ABS resource, and generate a power adjustment request according to the power adjustable interval, and request the aggressor cell base station to adjust the transmission power on the ABS resource.
  • the learning unit 110 may also learn the RSRP and/or RSRQ of the aggressor cell base station, and the reporting unit 120 may carry information (for example, RSRP and/or RSRQ) and current transmission power information or path loss for determining the interference level in the same measurement report. information.
  • the user equipment can also separately transmit information (e.g., RSRP and/or RSRQ) and current transmission power information or path loss information for determining the interference level in different measurement reports.
  • the power coordination information is used to indicate the power adjustment margin or the minimum transmission power of the aggressor cell base station on a specific channel resource.
  • the power coordination information may also be a power adjustment margin of a specific device (e.g., user equipment, terminal, etc.) on a specific channel resource and/or resource indication information of a specific channel resource.
  • FIG. 11 is a schematic flow chart of an interference coordination method according to another embodiment of the present invention.
  • the method of Figure 11 is performed by a base station (a base station of the interfered user equipment).
  • the user equipment may carry the power adjustment margin in the reported measurement report.
  • the serving base station adjusts the transmission power of the interfering user equipment on the specific channel resource according to the power coordination information.
  • the interfered user equipment reports the power adjustment margin to the base station, and the base station sends power coordination information to the base station of the user equipment that generates the interference, so that the base station of the user equipment that generates the interference can adjust the interference according to the power coordination information.
  • the transmission power of the user equipment on the specific channel resource thereby reducing interference between user equipments.
  • the specific channel resource in this embodiment may be an approximate null subframe ABS resource, or may be a resource on a normal service subframe.
  • the specific channel resource may be a flexible subframe resource.
  • the subframe type of the flexible subframe can be changed, and it is used as an uplink subframe for a certain period of time and as a downlink subframe for another period of time.
  • the granularity of a particular channel resource may be a frame, a subframe, a time slot, a symbol, a physical resource block group, a physical resource block, a subcarrier, a subband, and the like.
  • FIG. 12 is a schematic flow chart of an interference coordination method according to another embodiment of the present invention.
  • the method of Figure 12 is performed by a second base station (i.e., a base station of the user equipment generating the interference).
  • a second base station i.e., a base station of the user equipment generating the interference.
  • the second base station receives the power coordination information sent by the first base station, where the power coordination information is generated by the first base station according to a power adjustment margin reported by the user equipment of the first base station on a specific channel resource.
  • the power coordination information includes the power adjustment margin or the power coordination information includes the power adjustment margin and resource indication information of the specific channel resource, where a user equipment of the second base station is in the specific channel The resource interferes with the user equipment of the first base station.
  • the second base station adjusts, according to the power coordination information, a transmission power of the user equipment of the second base station on the specific channel resource.
  • the interfered user equipment reports the power adjustment margin to its own base station (the first base station), and the base station transmits power coordination information to the base station (second base station) of the user equipment that generates the interference, thereby generating interference of the user equipment.
  • the base station can adjust the transmission power of the interfering user equipment on the specific channel resource according to the power coordination information, thereby reducing interference between user equipments.
  • the specific channel resource in this embodiment may be an approximate null subframe ABS resource, or may be a resource on a normal service subframe.
  • the specific channel resource may be a flexible subframe resource.
  • the subframe type of the flexible subframe can be changed, and it is used as an uplink subframe for a certain period of time and as a downlink subframe for another period of time.
  • the granularity of a specific channel resource may be a frame, a subframe, a time slot, Symbols, physical resource block groups, physical resource blocks, subcarriers, subbands, etc.
  • FIG. 13 is a schematic flow chart of an interference coordination process according to another embodiment of the present invention.
  • Figure 13 is a schematic flow chart of an interference coordination process according to another embodiment of the present invention.
  • UE1 is a user equipment served by the first base station
  • UE2 is a user equipment served by the second base station, assuming that UE2 interferes with UE1 on a specific channel resource.
  • the user equipment UE1 of the first base station reports the power headroom of the UE1 on a specific channel resource.
  • the user equipment UE1 may carry the power adjustment margin in the reported measurement report.
  • the larger the range of power adjustment margins the larger the power adjustable interval of the user equipment UE1.
  • the smaller the range of power adjustment margins is, the smaller the power adjustable area of the user equipment UE1 is.
  • the range of power adjustable intervals reported by these user equipments is usually small.
  • the power adjustment margin may include a difference between the current transmission power and the minimum transmission power of the user equipment UE1 on the particular channel resource.
  • the indication of the power adjustment margin can be similarly followed by the indication method of the power adjustable section information described in 42 of Fig. 4, and details are not described herein again.
  • the first base station After receiving the power adjustment margin reported by the user equipment UE1, the first base station generates power coordination information according to the power adjustment margin.
  • the power coordination information includes the power adjustment margin, or resource indication information including the power adjustment margin and the specific channel resource.
  • the range of the power adjustment margin reported by the user equipment is small, it indicates that the transmission power of the user equipment is very close to the maximum allowed transmission power, and interference protection is needed to improve the reliability of the transmission of the user equipment.
  • the first base station transmits the power coordination information to the second base station.
  • the first base station determines, according to the location information of the user equipment UE1, the location information of the second base station, the measurement information of the user equipment UE1, and/or the measurement information of the first base station, etc., the user equipment UE2 to which the user equipment UE1 is received. Causing strong interference to it and transmitting the power coordination letter The information is given to the base station (i.e., the second base station) of the user equipment UE2 that is causing the interference.
  • the second base station receives the power coordination information transmitted by the first base station, and adjusts the transmission power of the user equipment UE2 of the second base station on the specific channel resource according to the received power coordination information, and reduces the user equipment of the first base station.
  • UE1 interference
  • the second base station can adjust the transmission power of the user equipment UE2 according to the extent of the power adjustment margin. That is, the smaller the range of the power adjustment margin is, the larger the amplitude of the transmission power of the user equipment UE2 is adjusted by the second base station. For example, at this time, the second base station can adjust the transmission power of all the user equipments served by the second base station on all channel resources, thereby realizing the adjustment of the transmission power of the UE2.
  • the second base station may reduce the transmission power of the user equipment UE2 on the specific channel resource indicated by the resource indication information, so as to reduce the user equipment of the first base station.
  • UE1 interference
  • the second base station adjusts, according to the extent of the power adjustment margin, the user equipment UE2, according to the resource indication information, Transmission power on a particular channel resource. For example, at this time, the second base station may adjust the transmission power of all user equipments served by the second base station on the specific channel resource indicated by the resource indication information, thereby implementing adjustment of the transmission power of the UE2.
  • the specific channel resource in this embodiment may be an approximate null subframe ABS resource, or may be a resource on a normal service subframe.
  • the specific channel resource may be a flexible subframe resource.
  • the subframe type of a flexible subframe can be changed, and it is used as an uplink subframe for a certain period of time and as a downlink subframe for another period of time.
  • the granularity of a particular channel resource may be a frame, a subframe, a time slot, a symbol, a physical resource block group, a physical resource block, a subcarrier, a subband, and the like.
  • FIG. 14 is a schematic block diagram of a base station in accordance with an embodiment of the present invention.
  • the base station 140 of FIG. 14 performs the method shown in FIG. 11 and the operation related to the first base station in FIG. 13, and includes a receiving unit 141, a generating unit 142, and a transmitting unit 143.
  • the receiving unit 141 receives the power adjustment margin of the user equipment reported by the user equipment on a specific channel resource.
  • the generating unit 142 generates power coordination information according to the power adjustment margin, where the power adjustment margin or the power coordination information includes the power adjustment margin and resource indication information of the specific channel resource.
  • the sending unit 143 sends the power coordination information to the serving base station of the user equipment that generates the interference, so that the serving base station adjusts the transmission power of the user equipment generating the interference on the specific channel resource according to the power coordination information.
  • the specific channel resource in this embodiment may be an approximate null subframe ABS resource, or may be a resource on a normal service subframe.
  • the specific channel resource may be a flexible subframe resource.
  • the subframe type of the flexible subframe can be changed, and it is used as an uplink subframe for a certain period of time and as a downlink subframe for another period of time.
  • the granularity of a particular channel resource may be a frame, a subframe, a time slot, a symbol, a physical resource block group, a physical resource block, a subcarrier, a subband, and the like.
  • the interfered user equipment reports the power adjustment margin to the base station, and the base station sends power coordination information to the base station of the user equipment that generates the interference, so that the base station of the user equipment that generates the interference can adjust the interference according to the power coordination information.
  • the transmission power of the user equipment on the specific channel resource thereby reducing interference between user equipments.
  • Figure 15 is a schematic block diagram of a base station in accordance with an embodiment of the present invention.
  • the base station 150 of Fig. 15 performs the method shown in Fig. 12 and the operation of the second base station in Fig. 13, including the receiving unit 151 and the adjusting unit 152.
  • the receiving unit 151 receives the power coordination information sent by the first base station, where the power coordination information is generated by the first base station according to the power adjustment margin reported by the user equipment of the first base station on a specific channel resource, where The power coordination information includes the power adjustment margin or the power coordination information including the power adjustment margin and resource indication information of the specific channel resource, where the user equipment of the base station 150 is on the specific channel resource.
  • the user equipment of the first base station generates a dry Disturb.
  • the adjusting unit 152 adjusts the transmission power of the user equipment of the base station 150 on the specific channel resource according to the power coordination information.
  • the specific channel resource in this embodiment may be an approximate null subframe ABS resource, or may be a resource on a normal service subframe.
  • the specific channel resource may be a flexible subframe resource.
  • the subframe type of the flexible subframe can be changed, and it is used as an uplink subframe for a certain period of time and as a downlink subframe for another period of time.
  • the granularity of a particular channel resource may be a frame, a subframe, a time slot, a symbol, a physical resource block group, a physical resource block, a subcarrier, a subband, and the like.
  • the interfered user equipment reports the power adjustment margin to the base station, and the base station sends power coordination information to the base station of the user equipment that generates the interference, so that the base station of the user equipment that generates the interference can adjust the interference according to the power coordination information.
  • the transmission power of the user equipment on the specific channel resource thereby reducing interference between user equipments.
  • a communication system may include the above-described base stations 60-80, 140, 150 or user equipment 100.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system System, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or a combination of hardware and software functional units.
  • portions of the software functional unit form may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

Abstract

本发明实施例提供了一种干扰协调方法和基站。该方法包括：确定侵害小区基站和侵害小区基站的干扰水平，并接收侵害小区基站发送的功率协调信息，功率协调信息用于指示侵害小区基站在特定信道资源上的功率调整余量或指示侵害小区基站在特定信道资源上的最小传输功率；根据侵害小区基站的干扰水平和功率协调信息，确定侵害小区基站中需要进行干扰协调的基站；向需要进行干扰协调的基站发送功率调整请求，以使得需要进行干扰协调的基站调整特定信道资源上的传输功率。本发明实施例降低了在特定信道资源上对受害小区基站的干扰，同时侵害小区基站仍可以使用特定信道资源进行业务传输，提高了系统容量。

Description

干扰协调方法和基站 本申请要求于 2011年 6月 17日提交的， 申请号为 201110163703.2,发明 名称为 "干扰协调方法和基站" 的中国申请的优先权， 其全部内容通过引用 结合在本申请中。 技术领域
本发明实施例涉及无线通信领域，并且更具体地， 涉及干扰协调方法和基 站。
背景技术
无线通信系统可以提供话音、数据等无线业务。通常的无线通信系统是一 个多址接入的无线系统， 其中， 基站在下行链路上给用户设备 UE (User Equipment)发射数据和 /或控制信息， 并在上行链路上接收用户设备的数据和 / 或控制信息。类似地， 用户设备在上行链路上为基站传输数据和 /或控制信息， 并在下行链路上接收基站发射的数据和 /或控制信息。以下将以 LTE( Long term evolution; 长期演进）和 /或 LTE-A ( LTE- Advanced; 先进的长期演进）无线 通信系统为例进行描述。
为了满足或提升 LTE-A 的性能需求， 可以在同构网络 (homogeneous network)内部署不同类型或不同制式的基站， 如低发射功率的基站（ BS; Base Station )或发射 /接收节点， Micro BS (微基站）， Pico BS (微微基站）， Home BS (家庭基站 ) , femto BS (室内基站）， Relay BS (中继基站 ) , RRH ( Remote radio head; 远程射频头）等， 以增强网络的覆盖和性能， 这样的网络结构被 称之为异构网络 (Heterogeneous network)。 以下以异构网络中部署了大发射功 率基站 (如宏基站，或者称为 Macro eNodeB或 MeNB)和低发射功率基站（筒称 低功率基站， lower power node, LPN)为例， 进一步进行阐述。
为了提高系统的频谱利用效率， LPN可配置的上行和 /或下行频谱资源与 MeNB可配置的上行和 /或下行频谱资源进行完全或部分的频谱复用。 此时， 由于 LPN配置了和 MeNB相同或部分相同的频谱资源， 因此 LPN (或 LPN服 务的 UE)和 MeNB (或 MeNB月良务的 UE)的下行信道或上行信道传输之间会产 生同道或同频干扰。该干扰会影响 LPN及 MeNB下行信道传输及上行信道检 测的可靠性， 该信道包括控制信道及数据信道，。
目前 LTE-A标准中采用时分复用 TDM(TDM: Time Division Multiplexing) 小区间干扰协调 ICIC(Inter Cell Interference Coordination)的方法处理异构网 络场景下小区间的干扰。 侵害小区基站 (可以是宏基站或者 LPN基站)将某些 特定信道资源设置为低传输功率或者不进行业务传输 (即业务的传输功率为 零）， 这样的特定信道资源的一个例子是近似空子帧（ABS: Almost Blank Subframe)资源。 被侵害小区基站 (可以是 LPN基站或者宏基站)将受到侵害小 区基站强干扰的 UE调度在与该侵害小区基站配置的 ABS子帧对应的子帧上 进行业务传输， 从而保证被干扰基站受害 UE的传输性能。
若侵害小区基站和被侵害小区基站之间没有对 ABS子帧上的传输功率进 行协调， 则当侵害小区基站将 ABS子帧上的传输功率设置的很低时， 可能几 乎没有 UE能够让侵害小区基站调度在 ABS子帧上进行业务传输， 从而降低 了可用的传输资源。 另一方面， 若侵害小区基站将 ABS 子帧调度给自己的 UE使用， 以增加传输资源， 但可能由于在 ABS子帧上的传输功率设置的不 合适， 仍然会导致对被侵害小区基站的 UE造成强干扰。
发明内容
本发明实施例提供一种干扰协调方法和基站， 能够减少基站间的干扰。 一方面， 提供了一种干扰协调方法， 包括： 确定侵害小区基站和所述侵害 小区基站的干扰水平， 并接收所述侵害小区基站发送的功率协调信息， 所述 功率协调信息用于指示所述侵害小区基站在特定信道资源上的功率调整余量 或指示所述侵害小区基站在特定信道资源上的最小传输功率； 根据所述侵害 小区基站的干扰水平和所述功率协调信息， 确定所述侵害小区基站中需要进 行干扰协调的基站； 向所述需要进行干扰协调的基站发送功率调整请求， 以 使得所述需要进行干扰协调的基站调整所述特定信道资源上的传输功率。
另一方面， 提供了一种干扰协调方法， 包括： 向邻区基站发送功率协调信 息， 所述功率协调信息用于指示侵害小区基站在特定信道资源上的功率调整 余量或指示所述侵害小区基站在特定信道资源上的最小传输功率； 接收所述 邻区基站根据所述功率协调信息发送的功率调整请求； 根据所述功率调整请 求， 调整所述特定信道资源上的传输功率。
另一方面， 提供了一种发送测量报告的方法， 包括： 获知用户设备的侵害 小区基站在特定信道资源上的当前传输功率， 或所述用户设备与所述侵害小 区基站之间进行数据传输的路损； 向所述用户设备的服务基站发送测量报告， 所述测量4艮告中携带所述特定信道资源上的当前传输功率， 或所述测量 4艮告 中携带所述路损以及所述用户设备接收参考信号的接收功率， 以使得所述服 务基站根据所述测量报告确定所述用户设备的侵害小区基站的当前传输功 率。
另一方面， 提供了一种干扰协调方法， 包括： 接收用户设备上报的所述用 户设备在特定信道资源上的功率调整余量； 向产生干扰的用户设备的服务基 站发送功率协调信息， 所述功率协调信息包括所述功率调整余量或所述功率 协调信息包括所述功率调整余量和所述特定信道资源的资源指示信息， 以便 所述服务基站根据所述功率协调信息调整所述产生干扰的用户设备在所述特 定信道资源上的传输功率。
另一方面， 提供了一种干扰协调方法， 包括： 第二基站接收第一基站发送 的功率协调信息， 所述功率协调信息由所述第一基站根据所述第一基站的用 户设备上报的在特定信道资源上的功率调整余量而生成， 所述功率协调信息 包括所述功率调整余量或所述功率协调信息包括所述功率调整余量和所述特 定信道资源的资源指示信息， 其中所述第二基站的用户设备在所述特定信道 资源上对所述第一基站的用户设备产生干扰； 第二基站根据所述功率协调信 息， 调整所述第二基站的用户设备在所述特定信道资源上的传输功率。
另一方面， 提供了一种基站设备， 包括： 识别单元， 用于确定侵害小区基 站和所述侵害小区基站的干扰水平； 接收单元， 用于接收所述侵害小区基站 发送的功率协调信息， 所述功率协调信息用于指示所述侵害小区基站在特定 信道资源上的功率调整余量或指示所述侵害小区基站在特定信道资源上的最 小传输功率； 确定单元， 用于基于所述识别单元确定的侵害小区基站的干扰 水平和所述接收单元接收的功率协调信息， 确定所述侵害小区基站中需要进 行干扰协调的基站； 请求单元， 用于向所述确定单元确定的需要进行干扰协 调的基站发送功率调整请求， 以使得所述需要进行干扰协调的基站调整所述 特定信道资源上的传输功率。
另一方面， 提供了一种基站， 包括： 发送单元， 用于向邻区基站发送功率 协调信息， 所述功率协调信息用于指示基站在特定信道资源上的功率调整余 量或指示所述基站在特定信道资源上的最小传输功率； 接收单元， 用于接收 所述邻区基站根据所述功率协调信息发送的功率调整请求； 调整单元， 用于 根据所述接收单元接收的功率调整请求， 调整所述特定信道资源上的传输功 率。
另一方面， 提供了一种基站， 包括： 接收单元， 用于接收用户设备上报的 所述用户设备在特定信道资源上的功率调整余量； 生成单元， 用于根据所述 接收单元接收的所述功率调整余量生成功率协调信息， 所述功率协调信息包 括所述功率调整余量或所述功率协调信息包括所述功率调整余量和所述特定 信道资源的资源指示信息； 发送单元， 用于向产生干扰的用户设备的服务基 站发送所述生成单元生成的功率协调信息， 以便所述服务基站根据所述功率 协调信息调整所述产生干扰的用户设备在所述特定信道资源上的传输功率。
另一方面， 提供了一种基站， 包括： 接收单元， 用于接收第一基站发送的 功率协调信息， 所述功率协调信息由所述第一基站根据所述第一基站所服务 的用户设备上报的在特定信道资源上的功率调整余量而生成， 所述功率协调 信息包括所述功率调整余量或所述功率协调信息包括所述功率调整余量和所 述特定信道资源的资源指示信息， 其中所述基站的用户设备在所述特定信道 资源上对所述第一基站的用户设备产生干扰； 调整单元， 用于根据所述接收 单元接收的功率协调信息， 调整所述基站的用户设备在所述特定信道资源上 的传输功率。 另一方面， 提供了一种用户设备， 包括： 获知单元， 用于获知所述用户设 备的侵害小区基站在特定信道资源上的当前传输功率， 或所述用户设备与所 述侵害小区基站之间进行数据传输的路损； 报告单元， 用于向所述用户设备 的服务基站发送测量报告， 所述测量报告中携带所述获知单元获知的特定信 道资源上的当前传输功率， 或所述测量 告中携带所述获知单元获知的路损 以及所述用户设备接收参考信号的接收功率， 以使得所述服务基站根据所述 测量报告确定所述用户设备的侵害小区基站的当前传输功率。
本发明实施例由侵害小区基站向受害小区基站发送关于特定信道资源的 功率协调信息， 并基于受害小区基站基于该功率协调信息生成的调整请求， 调整特定信道资源上的传输功率， 从而降低在特定信道资源上对受害小区基 站的干扰， 同时侵害小区基站仍可以使用特定信道资源进行业务传输， 提高 了系统容量。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例或现有技术 描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附图仅 仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性 劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1是基站间干扰协调的场景的一个例子的示意图。
图 2是根据本发明实施例的干扰协调方法的流程图。
图 3是根据本发明另一实施例的干扰协调方法的流程图。
图 4是根据本发明一个实施例的干扰调节过程的示意流程图。
图 5是根据本发明另一实施例的干扰协调过程的示意流程图。
图 6是根据本发明一个实施例的基站的框图。
图 7是根据本发明另一实施例的基站的框图。
图 8是根据本发明另一实施例的基站的框图。
图 9是根据本发明实施例的发送测量报告的方法的示意流程图。
图 10是根据本发明实施例的用户设备的示意框图。 图 11是根据本发明另一实施例的干扰协调方法的示意流程图。 图 12是根据本发明另一实施例的干扰协调方法的示意流程图。
图 13是根据本发明另一实施例的干扰协调过程的示意流程图。
图 14是根据本发明实施例的基站的示意框图。
图 15是根据本发明实施例的基站的示意框图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例是本发明一部分实施例， 而不是全 部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
本发明实施例适用于无线通信系统， 特别是 LTE/LTE-A无线通信系统。 下面以本发明应用于 LTE/LTE-A 无线通信系统为例阐述本发明的具体实施 例。 但本发明实施例不限于此特定无线通信系统。 需要说明的是， 在本文中 不弓 I起歧义的前提下， 基站的概念可以等同于小区。
在异构网络中采用 TDM ICIC的方法处理异构网络场景下小区间的干扰 时， 若干扰基站将特定信道资源 （例如 ABS资源 )调度给自己的 UE使用， 可增加传输资源。
图 1是基站间干扰协调的场景的一个例子的示意图。 图 1例示了 Macro eNB和其覆盖范围内的 Pico eNB进行 TDM ICIC的示意图。 若考虑到 Macro eNB对 Pico eNB进行干扰保护， Macro eNB可以将某些子帧设置为 ABS子帧。 如图 1所示， 101表示的是宏基站； 201~202表示的是低功率基站 (如 Pico eNB); 301-307表示的是用户设备； 401-405表示基站的覆盖范围，其中 401表示 101 在非 ABS子帧上的覆盖范围， 402表示 201在 Macro eNB非 ABS子帧对应的 子帧上的覆盖范围， 404表示 202在 Macro eNB非 ABS子帧对应的子帧上的 覆盖范围， 403表示 201在 Macro eNB ABS子帧对应的子帧上的覆盖范围， 405表示 202在 Macro eNB ABS子帧对应的子帧上的覆盖范围。 在图 1中， 由于 101的发射功率比较大， 101的传输可能会对 201~202造成干扰。 101为 了降低对 201~202的干扰， 101将某些子帧设置为 ABS, 且 101不在 ABS上 进行业务调度 (即 ABS上的数据传输功率为 0)。 因此 101只能在非 ABS子帧 上为自己的 UE 301-303调度数据。
为了进一步提高网络的容量和资源利用效率， 101可以在 ABS上设置适 当的传输功率， 使 101在 ABS上的传输不会对 201-202造成严重的干扰。 如 图 1中的虚线框所示， 406是基站 101在 ABS上的覆盖范围。 101在 ABS上 的传输不会对 201~202的传输 (或 304、 307的接收)造成干扰,因此基站 101可 以调度用户设备 301和 302在 ABS上进行业务传输， 从而提高系统的容量。
从图 1可以看出，侵害小区基站 (如基站 101)如果在 ABS上的功率设置的 适当， 则侵害小区基站可以在降低对受害小区基站干扰的同时， 仍然可以使 用 ABS用于自己 UE的业务传输， 从而提高系统的容量。
但是， 在此情况下， 可能由于在 ABS上的传输功率设置的不合适， 仍然 会导致对受害小区基站造成强干扰。例如，如果基站 101的 ABS覆盖范围 406 过大（即， ABS上的传输功率设置得过高 ), 则可能会干扰到 201的 ABS覆 盖范围 403或基站 202的 ABS覆盖范围 405内的用户设备。 因此， 侵害小区 基站在设置 ABS子帧上的传输功率时， 需要考虑侵害小区基站周边的受害小 区基站或者受害 UE的位置和数量，在保证系统容量和自己服务的 UE的业务 需求的同时， 适当设置 ABS子帧上的覆盖范围， 降低侵害小区基站对受害小 区基站或者受害 UE的干扰。
本发明实施例针对上述应用场景，提出了一种基站间干扰协调的方法，用 于保证侵害小区基站在 ABS上设置合适的传输功率， 降低对受害小区基站的 干扰， 同时仍然能够使得侵害小区基站在 ABS上进行业务传输， 提高系统容 量。
图 2是根据本发明实施例的干扰协调方法的流程图。图 2的方法由受害小 区基站执行。
21 ,确定侵害小区基站和所述侵害小区基站的干扰水平，并接收所述侵害 小区基站发送的功率协调信息， 所述功率协调信息用于指示所述侵害小区基 站在特定信道资源上的功率调整余量或指示所述侵害小区基站在特定信道资 源上的最小传输功率。
22,根据所述侵害小区基站的干扰水平和所述功率协调信息，确定所述侵 害小区基站中需要进行干扰协调的基站。
23 , 向所述需要进行干扰协调的基站发送功率调整请求， 以使得所述需要 进行干扰协调的基站调整所述特定信道资源上的传输功率。
本发明实施例由侵害小区基站向受害小区基站发送关于特定信道资源的 功率协调信息， 并基于受害小区基站基于该功率协调信息生成的调整请求， 调整特定信道资源上的传输功率， 从而降低在特定信道资源上对受害小区基 站的干扰， 同时侵害小区基站仍可以使用特定信道资源进行业务传输， 提高 了系统容量。
图 3是根据本发明另一实施例的干扰协调方法的流程图。图 3的方法由侵 害小区基站执行。
31 , 向邻区基站发送功率协调信息，所述功率协调信息用于指示侵害小区 基站在特定信道资源上的功率调整余量或指示所述侵害小区基站在特定信道 资源上的最小传输功率。
32, 接收所述邻区基站根据所述功率协调信息发送的功率调整请求。
33 , 根据所述功率调整请求， 调整所述特定信道资源上的传输功率。 本发明实施例由侵害小区基站向受害小区基站发送关于特定信道资源的 功率协调信息， 并基于受害小区基站基于该功率协调信息生成的调整请求， 调整特定信道资源上的传输功率， 从而降低在特定信道资源上对受害小区基 站的干扰， 同时侵害小区基站仍可以使用特定信道资源进行业务传输， 提高 了系统容量。
下面结合具体例子， 更加详细地描述本发明实施例。 需要指出的是， 在本 发明下述的实施例中， 基站间的功率协调针对 ABS资源 （特定信道资源的一 个例子）上的传输功率执行。 ABS资源可以以 ABS子帧上的整个频带为粒度。 实际系统中， 为了达到更精细的功率协调结果， 本发明实施例可以类似地应 用于更精细的功率协调粒度， 例如调整 ABS资源所占的频域的子载波、 ABS 资源所占的频域的物理资源块或 ABS资源所占的频域的资源块组上的传输功 率。 例如， 可以采用单个或多个物理资源块作为功率协调的粒度。
另外， 本发明实施例的特定信道资源不限于下面所述的 ABS资源， 也可 以应用于其他类型的信道资源， 例如灵活子帧 （flexible subframe ) 资源。 灵 活子帧的子帧类型可以变化， 在某段时间内作为上行子帧， 在另一段时间内 作为下行子帧。
图 4是根据本发明一个实施例的干扰调节过程的示意流程图。图 4的实施 例中， 功率协调信息用于指示侵害小区基站在特定信道资源上的功率调整余 量。 此时， 侵害小区基站在特定信道资源上的功率调整余量包括侵害小区基 站在特定信道资源上当前的传输功率和最小传输功率之间的差。
上述最小发射功率可以由网络配置给基站，进一步的，该最小发射功率的 值可以根据系统网路规划确定。
41 , 侵害小区基站获知 ABS资源上的当前传输功率和最小传输功率。 为了使干扰基站自己服务的 UE的业务需求和网络系统的容量，不会因为
ABS资源的设置有很大的影响，侵害小区基站可以在 ABS资源上设置一个最 低的发射功率 Power_min分贝（dB)。 侵害小区基站的最小传输功率通常是在 网络规划、 网络优化阶段确定的值， 并由网络配置给基站。 例如， 可依据侵 害小区基站、 受害小区基站在不同子帧类型上 (ABS资源或者非 ABS资源）的 不同覆盖范围的大小和链路预算 (Link Budget)来设置最小发射功率。 另夕卜， 侵 害小区基站也可以通过自组织网络 (Self-organizing Network)或自优化网络 (Self-optimizing Network)的机制来半静态地调整在 ABS资源上的最小发射功 率的设置。
42, 作为功率调整余量的一个例子， 侵害小区基站得到所述 ABS资源上 的当前传输功率和最小传输功率之间的差。
假设侵害小区基站在 ABS资源上的当前发射功率为 Power_c分贝（dB), 则功率调整余量（或者称为功率可调整区间） 的范围为： 功率可调整区间 =Power_c - Power_min
所述功率可调整区间信息可以通过比特指示的方式表示侵害小区基站的 功率可调整区间。 如假设侵害小区基站在 ABS 子帧上的最大发射功率为 Power_max分贝（dB), 则最大功率可调整区间的范围为：
最大功率可调整区间 =Power_max - Power—min
若以 1分贝为指示的步长 (Step), 则可以用 Ceil(Log2(最大功率可调整区 间))个比特进行功率可调整区间的指示。 一般而言， 若功率可调整区间的指示 步长为 A分贝， 则需要 Ceil(Log2(最大功率可调整区间 /A))个比特进行功率可 调整区间的指示。 这里 Ceil(x)表示对 X向上取整。
另一种指示功率可调整区间的方法为：功率可调整区间信息包含两个指示 字段 IE1和 IE2。 其中 IE1用于指示上述指示步长的具体值， IE2用于指示某 个指示范围内的特定值。 功率可调整区间的值为 ΙΕ1χΙΕ2。
43 , 侵害小区基站将功率调整余量（或者称为功率可调整区间 )发送给受 害小区基站。
侵害小区基站周期性地或者事件触发地向周边的邻区基站或者相邻受害 小区基站发送功率可调整区间。
侵害小区基站将上述功率可调整区间信息 (用于指示功率可调整区间的比 特字段， 和 /或指示功率可调整区间的指示步长的字段)通过 X2接口， 或 S1 接口， 或空口等接口传输给邻区基站。 如以 LTE/LTE-A系统为例， 侵害小区 基站可以向受害小区基站发送 Load indication (负载指示）信息， 在 Load indication信息中携带上述功率可调整区间信息。
例如， 可以将 ABS资源上的功率可调整区间信息 ABS Power Adjustment Range Info 包含在 Load indication 中的 ABS information的信息元素 (IE: Information Element)中。
或者， 可以将 ABS资源上的功率可调整区间信息 ABS Power Adjustment Range Info包含在 Load indication的 IE中。
44, 受害小区基站获知侵害小区基站和侵害小区基站的干扰水平。 受害小区基站可以自己测量侵害小区基站及其干扰水平。或者， 受害小区 基站可以根据用户设备上报的测量报告获知侵害小区基站及其干扰水平， 受 害小区基站的 UE 上报测量到的相邻小区的参考信号接收功率 (RSRP: Reference signal reception power)和 /或参考信号接收质量 (RSRQ: Reference signal reception quality)„ 受害小区基站根据受害小区基站服务的 UE上报的 RSRP和 /或 RSRQ的值 (或分布）， 确定哪些相邻基站是侵害小区基站。 进一步 地，可以确定出哪些相邻的基站对所述受害小区基站的边缘 UE (边缘 UE可以 是指在地理范围上处于小区覆盖的边缘的 UE, 也可以是指 UE的信号质量在 小区所有 UE信号质量分布中处于低段区间部分的 UE)的干扰影响大，哪些相 邻的基站对所述受害小区基站的边缘 UE的干扰影响小，从而使受害小区基站 识别出侵害小区基站的干扰水平 （例如， 强干扰基站和弱干扰基站）。
应注意， 44和 41-43的执行顺序对本发明实施例不构成限制。 44可以在 41-43之后执行， 也可以在 41-43之前执行， 或者如图 4所示与 41-43并行执 行。 这些变化均在本发明实施例的范围内。
45, 受害小区基站根据在 43中接收的功率协调信息 （在此例子中， 功率 协调信息为功率可调整区间信息）和 44中确定的侵害小区基站的干扰水平， 确定需要进行干扰协调的基站。
如 44中所述， 受害小区基站根据受害小区基站服务的 UE上报的 RSRP 和 /或 RSRQ的值 (或分布)可以识别出强干扰基站和弱干扰基站。 进一步地， 受害小区基站根据相邻基站通知的 ABS资源上的功率可调整区间信息可以获 知相邻基站的功率可调整范围。 受害小区基站根据所识别的侵害小区基站的 干扰水平（例如强干扰基站和弱干扰基站信息）、 所获知的相邻基站的功率可 调整范围信息（即侵害小区基站的功率调整余量），对侵害小区基站进行排序， 按照排序的结果确定所述需要进行干扰协调的基站。 例如， 受害小区基站可 以将按照优先级从高到低的顺序， 优先向最高优先级的侵害小区基站发送功 率调整请求。 若最高优先级的侵害小区基站已经把在 ABS资源上的传输功率 降低到最小传输功率时，受害小区基站的边缘 UE的性能仍然不能满足可靠接 收的需求， 则受害小区基站可以按照从高到低的顺序， 继续向下一个优先级 的侵害小区基站发送功率调整请求。 当然， 受害小区基站也可以确定其它发 送功率调整请求的规则， 如同时向几个高优先级的侵害小区基站发送功率调 整请求等。
排序的准则可以为： 强干扰基站，并且该强干扰基站的功率可调整区间大 时， 该强干扰基站具有最高的优先级； 强干扰基站， 并且该强干扰基站的功 率可调整区间适中时， 该强干扰基站具有中优先级； 强干扰基站， 并且该强 干扰基站的功率可调整区间较低时， 该强干扰基站具有低优先级； 低干扰基 站， 并且该低干扰基站的功率可调整区间较大时， 该强干扰基站具有较低优 先级； 低干扰基站， 并且该低干扰基站的功率可调整区间较低时， 该强干扰 基站具有最低优先级。
46, 受害小区基站向 45中确定的需要进行干扰协调的基站发送功率调整 请求。 例如， 受害小区基站根据上述 45中排序的结果， 优先向最高优先级的 侵害小区基站发送功率调整请求。
功率调整请求信息承载的内容可以是受害小区基站期望侵害小区基站功 率调整的相对幅度值 (即相对于侵害小区基站当前的传输功率的调整幅度)，也 可以是受害小区基站期望侵害小区基站功率调整的绝对幅度值 (即受害小区基 站期望侵害小区基站的传输功率值)。 功率调整请求信息的指示可以类似地按 照前述功率可调整区间信息的指示方法， 这里不再赘述。
另外， 受害小区基站可以向侵害小区基站发送 Load indication信息， 并在 Load indication信息中携带功率调整请求。 功率调整请求可通过 X2接口， 或 S1接口， 或空口等接口传输给侵害小区基站。
47,侵害小区基站接收到受害小区基站发送的功率调整请求之后，根据所 述功率调整请求， 调整 ABS资源上的传输功率。 例如， 侵害小区基站在该基 站允许的功率调整范围内调整 ABS资源上的传输功率。
需要指出的是， 上述基站间功率协调的过程可以是一个迭代 (即循环重复) 的过程。 侵害小区基站可以和受害小区基站进行多次上述的功率协调， 在保 证侵害小区基站在 ABS资源上最小发射功率的同时， 也保证受害小区基站在
ABS资源上的业务可靠传输。
图 5是根据本发明另一实施例的干扰协调过程的示意流程图。在图 5的实 施例中， 所述功率协调信息用于指示侵害小区基站在特定信道资源上的最小 传输功率。
51 , 侵害小区基站确定 ABS资源上的最小传输功率。
侵害小区基站的最小发射功率通常是在网络规划、 网络优化阶段确定的 值， 并由网络配置给基站。 例如， 可依据侵害小区基站、 受害小区基站在不 同子帧类型上 (ABS资源或者非 ABS资源）的不同覆盖范围的大小和链路预算 (Link Budget)来设置最小发射功率。 另夕卜， 侵害小区基站也可以通过自组织网 络 (Self-organizing Network)或自优化网络 (Self-optimizing Network)的机制来半 静态地调整在 ABS资源上的最小发射功率的设置。
52,侵害小区基站生成包括 ABS资源上的最小传输功率的功率协调信息。
53,侵害小区基站将最小传输功率信息发送给受害小区基站。发送最小传 输功率信息的方法可参照 43所述， 因此不再赘述。
54, 受害小区基站接收用户设备上报的测量报告，该测量报告中携带受害 小区基站的 UE测量到的相邻小区的 RSRP和 /或 RSRQ。 另外， 该测量报告 中还携带侵害小区基站的当前传输功率信息， 或者携带用户设备接收参考信 号的接收功率和用户设备与侵害小区基站之间的路损 (Pathloss)信息。
55, 受害小区基站根据用户设备上报的测量报告，确定侵害小区基站和侵 害小区基站的干扰水平。 另外， 受害小区基站获取测量报告中携带侵害小区 基站的当前传输功率信息或者路损信息。 在一个实施例中， 用户设备可在同 一测量报告中携带用于确定干扰水平的信息（例如， RSRP和 /或 RSRQ )和当 前传输功率信息或者路损信息。 用户设备也可以分开在不同的测量 告中发 送用于确定干扰水平的信息和当前传输功率信息或者路损信息。
侵害小区基站和侵害小区基站的干扰水平的获知方法可参照 44所述， 这 里不再赘述。 侵害小区基站的当前 ABS资源传输功率信息或者路损信息可以 从用户设备上报的测量报告中获知。 在本实施例中 , 用户设备的测量报告中 还需要包含侵害小区基站的当前 ABS 资源传输功率信息或者路损信息 (即侵 害小区基站到用户设备的路径损耗值)。 UE通过测量侵害小区基站的导频信 号 (即参考信号， 如小区特定的参考信号， 或用户设备特定的参考信号， 或解 调参考信号，或信道状态信息参考信号)或者读取系统信息获得当前 ABS资源 传输功率或者路损。 当前 ABS资源传输功率信息或者路损信息的指示可以按 照 43中描述的指示方法类似进行， 这里不再赘述。
56, 受害小区基站根据在 53中接收的功率协调信息 （在此例子中， 功率 协调信息为最小传输功率信息）和 55中确定的侵害小区基站的干扰水平和干 侵害小区基站的当前 ABS资源传输功率信息或者路损信息， 确定需要进行干 扰调整的基站。
受害小区基站根据获知的侵害小区基站的当前 ABS资源传输功率信息和 最小传输功率信息获取干扰基站的功率可调整区间信息。 即， 功率可调整区 间等于当前 ABS资源传输功率和最小传输功率信息的差。 受害小区基站确定 了侵害小区基站的功率可调整区间后， 可以按照类似于 45中描述的方法确定 需要进行干扰协调的基站， 这里不再赘述。
或者，受害小区基站根据所述最小传输功率信息以及用户设备接收参考信 号的接收功率以及用户设备与侵害小区基站之间的路损信息， 获取侵害小区 基站的功率可调整区间信息。 受害小区基站 （即所述用户设备的服务基站） 将所述路损与所述用户设备接收参考信号的接收功率相加的和作为所述用户 设备的侵害小区基站的当前传输功率。 此时， 功率可调整区间等于所述当前 传输功率和最小传输功率信息的差。 受害小区基站确定了侵害小区基站的功 率可调整区间后， 可以按照类似于 45中描述的方法确定需要进行干扰协调的 基站， 这里不再赘述。
57, 受害小区基站向 55中确定的需要进行干扰协调的基站发送功率调整 请求。 57的发送方法可参照 46所述， 因此不再赘述。
58,侵害小区基站接收到受害小区基站发送的功率调整请求之后，根据所 述功率调整请求， 调整 ABS资源上的传输功率。 调整传输功率的方法可参照
47所述， 因此不再赘述。
需要指出的是， 上述基站间功率协调的过程可以是一个迭代 (即循环重复) 的过程。 侵害小区基站可以和受害小区基站进行多次上述的功率协调， 在保 证侵害小区基站在 ABS资源上最小发射功率的同时， 也保证受害小区基站在 ABS资源上的业务可靠传输。
因此，根据本发明实施例，侵害小区基站可以在降低对受害小区基站干扰 的同时， 仍然可以使用 ABS资源用于自己 UE的业务传输， 从而提高系统的 谷里。
图 6是根据本发明一个实施例的基站设备的框图。 图 6的基站 60包括识 别单元 61、 接收单元 62、 确定单元 63和请求单元 64。
识别单元 61获知侵害小区基站和侵害小区基站的干扰水平。接收单元 62 接收所述侵害小区基站发送的功率协调信息， 所述功率协调信息用于指示所 述侵害小区基站在特定信道资源上的功率调整余量或指示所述侵害小区基站 在特定信道资源上的最小传输功率。 确定单元 63基于所述识别单元 61确定 的侵害小区基站的干扰水平和所述接收单元 62接收的功率协调信息， 确定所 述侵害小区基站中需要进行干扰协调的基站。 请求单元 64向所述需要进行干 扰协调的基站发送功率调整请求， 以使得所述需要进行干扰协调的基站调整 所述特定信道资源上的传输功率。
本发明实施例由侵害小区基站向受害小区基站发送关于特定信道资源的 功率协调信息， 并基于受害小区基站基于该功率协调信息生成的调整请求， 调整特定信道资源上的传输功率， 从而降低在特定信道资源上对受害小区基 站的干扰， 同时侵害小区基站仍然能使用特定信道资源进行业务传输， 提高 了系统容量。
图 6的基站 60的一个例子是图 4或图 5中的受害小区基站， 并执行受害 小区基站的相应操作。
例如， 当接收单元 62接收的功率协调信息用于指示侵害小区基站在特定 信道资源上的功率调整余量时， 所述功率调整余量包括所述侵害小区基站在 所述特定信道资源上当前的传输功率和最小传输功率之间的差。 此时， 确定 单元 63根据所述侵害小区基站的干扰水平和所述功率调整余量对所述侵害小 区基站进行排序， 并根据所述排序的结果确定所述需要进行干扰协调的基站。
例如， 当接收单元 62接收的功率协调信息用于指示所述侵害小区基站在 特定信道资源上的最小传输功率时， 接收单元 62还用于从用户设备接收的所 述侵害小区基站在所述特定信道资源上的当前传输功率信息， 或从用户设备 接收所述用户设备接收参考信号的接收功率和所述用户设备与所述侵害小区 基站之间的路损信息。 确定单元 63根据接收单元 62所接收的所述最小传输 功率信息和所述当前传输功率信息获取所述侵害小区基站的功率可调整区间 信息， 或根据接收单元 62所接收的所述最小传输功率信息以及所述接收功率 和所述路损信息获取所述侵害小区基站的功率可调整区间信息， 根据所述侵 害小区基站的干扰水平和所述功率可调整区间信息对所述侵害小区基站进行 优先级排序， 根据所述优先级排序的结果确定所述需要进行干扰协调的基站。
所述特定信道资源可以是 ABS资源。 ABS资源可以以 ABS子帧上的整 个频带为粒度， 也可以采用更精细的粒度。 请求单元 64可使得所述需要进行 干扰协调的基站调整 ABS资源上的传输功率、 ABS资源所占的频域的子载波 上的传输功率、 ABS资源所占的频域的物理资源块上的传输功率或 ABS资源 所占的频域的资源块组上的传输功率。
请求单元 64可以向所述需要进行干扰协调的基站发送负载指示信息， 在 所述负载指示信息中携带所述功率调整请求。
图 7是根据本发明另一实施例的基站设备的框图。 图 7的基站 70包括发 送单元 71、 接收单元 72和调整单元 73。
发送单元 71向邻区基站发送功率协调信息功率协调信息用于指示基站 70 在特定信道资源上的功率调整余量或指示基站 70在特定信道资源上的最小传 输功率。 接收单元 72接收邻区基站根据所述功率协调信息发送的功率调整请 求。 调整单元 73根据接收单元 72接收的所述功率调整请求， 调整特定信道 资源上的传输功率。
本发明实施例由侵害小区基站向受害小区基站发送关于特定信道资源的 功率协调信息， 并基于受害小区基站基于该功率协调信息生成的调整请求， 调整特定信道资源上的传输功率， 从而降低在特定信道资源上对受害小区基 站的干扰， 同时侵害小区基站仍然能使用特定信道资源进行业务传输， 提高 了系统容量。
图 7的基站 70的一个例子是图 4或图 5中的侵害小区基站， 并执行侵害 小区基站的相应操作。
图 8是根据本发明另一实施例的基站的框图。 图 8的基站 80包括图 7所 示的发送单元 71、 接收单元 72和调整单元 73。 此外， 基站 80还包括获知单 元 81和生成单元 82。
当发送单元 71发送的功率协调信息用于指示所述侵害小区基站在特定信 道资源上的功率调整余量时， 所述侵害小区基站在特定信道资源上的功率调 整余量包括所述侵害小区基站在所述特定信道资源上当前的传输功率和最小 传输功率之间的差。 此时， 获知单元 81获知特定信道资源上的当前传输功率 和最小传输功率。 生成单元 82获得指示特定信道资源上的当前传输功率和最 小传输功率之间的差， 作为功率调整余量， 并生成指示该功率调整余量的功 率协调信息。
根据本发明的另一实施例， 当发送单元 71发送的功率协调信息用于指示 所述侵害小区基站在特定信道资源上的最小传输功率时， 获知单元 81获知特 定信道资源上的最小传输功率。 生成单元 82生成功率协调信息， 用于指示特 定信道资源上的最小传输功率。
所述特定信道资源可以是 ABS资源。 ABS资源可以以 ABS子帧上的整 个频带为粒度， 也可以采用更精细的粒度。 调整单元 73可根据所述功率调整 请求， 调整 ABS资源上的传输功率、 ABS资源所占的频域的子载波上的传输 功率、 ABS资源所占的频域的物理资源块上的传输功率或 ABS资源所占的频 域的资源块组上的传输功率。 发送单元 71可以向邻区基站发送负载指示信息， 在负载指示信息中携带 所述功率协调信息。
图 9是根据本发明实施例的发送测量报告的方法的示意流程图。图 9的方 法由用户设备执行。
91 ,获知用户设备的侵害小区基站在特定信道资源上的当前传输功率，或 所述用户设备与所述侵害小区基站之间进行数据传输的路损。
92, 向所述用户设备的服务基站发送测量报告，所述测量报告中携带所述 特定信道资源上的当前传输功率或所述测量报告中携带所述路损以及所述用 户设备接收参考信号的接收功率， 以使得所述服务基站根据所述测量报告确 定所述用户设备的侵害小区基站的当前传输功率。
图 9的方法可应用于图 5的实施例中（过程 54 ), 向受害小区基站上报侵 害小区基站在 ABS资源上的当前传输功率或路损， 从而受害小区基站能够根 据用户设备上报的 ABS资源上的当前传输功率或路损， 结合受害小区基站从 侵害小区基站接收的最小传输功率信息， 得到侵害小区基站在 ABS资源上的 当前传输功率。 从而受害小区基站能够获得侵害小区基站在 ABS资源上的功 率可调整区间， 并按照功率可调整区间生成功率调整请求， 请求侵害小区基 站调整 ABS资源上的传输功率。
可选的，在一个实施例中， 当所述测量报告中携带所述路损信息以及所述 用户设备接收参考信号的接收功率时， 所述服务基站将所述路损与所述用户 设备接收参考信号的接收功率相加的和作为所述用户设备的侵害小区基站的 当前传输功率。
图 10是根据本发明实施例的用户设备的示意框图。 图 10的用户设备 100 包括获知单元 110和报告单元 120。
获知单元 110获知用户设备 100的侵害小区基站在特定信道资源上的当前 传输功率， 或用户设备 100与所述侵害小区基站之间进行数据传输的路损。 报告单元 120向用户设备 100的服务基站发送测量报告， 所述测量报告中携 带所述获知单元 110获知的特定信道资源上的当前传输功率， 或所述测量报 告中携带所述获知单元 110获知的路损以及用户设备 100接收参考信号的接 收功率， 以使得所述服务基站根据所述测量报告确定用户设备 100 的侵害小 区基站的当前传输功率。
图 10的用户设备 100可应用于图 5的实施例中 （过程 54 ), 向受害小区 基站上报侵害小区基站在 ABS资源上的当前传输功率或路损， 从而受害小区 基站能够根据用户设备上报的 ABS资源上的当前传输功率或路损， 结合受害 小区基站从侵害小区基站接收的最小传输功率信息， 得到侵害小区基站在 ABS 资源上的当前传输功率。 从而受害小区基站能够获得侵害小区基站在 ABS 资源上的功率可调整区间， 并按照功率可调整区间生成功率调整请求， 请求侵害小区基站调整 ABS资源上的传输功率。
获知单元 110还可以获知侵害小区基站的 RSRP和 /或 RSRQ, 报告单元 120 可在同一测量报告中携带用于确定干扰水平的信息（例如， RSRP和 /或 RSRQ )和当前传输功率信息或者路损信息。 用户设备也可以分开在不同的测 量报告中发送用于确定干扰水平的信息（例如， RSRP和 /或 RSRQ )和当前传 输功率信息或者路损信息。
在本发明的上述实施例中，功率协调信息用于指示侵害小区基站在特定信 道资源上的功率调整余量或最小传输功率。 根据本发明的另一实施例， 功率 协调信息也可以是其它设备 (如用户设备，终端等)在特定信道资源上的功率调 整余量和 /或特定信道资源的资源指示信息。
图 11是根据本发明另一实施例的干扰协调方法的示意流程图。图 11的方 法由基站（受到干扰的用户设备的基站）执行。
1101 ,接收用户设备上报的所述用户设备在特定信道资源上的功率调整余 量。 在此情况下， 用户设备可以在上报的测量报告中携带所述功率调整余量。
1102, 向产生干扰的用户设备的服务基站发送功率协调信息，所述功率协 调信息包括所述功率调整余量或所述功率协调信息包括所述功率调整余量和 所述特定信道资源的资源指示信息， 以便所述服务基站根据所述功率协调信 息调整所述产生干扰的用户设备在所述特定信道资源上的传输功率。 这样，被干扰的用户设备向自己的基站上报功率调整余量， 由该基站向产 生干扰的用户设备的基站发送功率协调信息， 从而产生干扰的用户设备的基 站能够根据功率协调信息调整该产生干扰的用户设备在所述特定信道资源上 的传输功率， 从而降低了用户设备之间的干扰。
本实施例中所述特定信道资源可以是近似空子帧 ABS资源， 也可以是正 常的业务子帧上的资源。 例如， 所述特定信道资源可以是灵活子帧 （flexible subframe )资源。灵活子帧的子帧类型可以变化，在某段时间内作为上行子帧， 在另一段时间内作为下行子帧。 特定信道资源的粒度可以是帧、 子帧、 时隙、 符号、 物理资源块组、 物理资源块、 子载波、 子频带等。
图 12是根据本发明另一实施例的干扰协调方法的示意流程图。图 12的方 法由第二基站（即， 产生干扰的用户设备的基站）执行。
1201 ,第二基站接收第一基站发送的功率协调信息，所述功率协调信息由 所述第一基站根据所述第一基站的用户设备上报的在特定信道资源上的功率 调整余量而生成， 所述功率协调信息包括所述功率调整余量或所述功率协调 信息包括所述功率调整余量和所述特定信道资源的资源指示信息， 其中所述 第二基站的用户设备在所述特定信道资源上对所述第一基站的用户设备产生 干扰。
1202,第二基站根据所述功率协调信息，调整所述第二基站的用户设备在 所述特定信道资源上的传输功率。
这样， 被干扰的用户设备向自己的基站 （第一基站）上报功率调整余量， 由该基站向产生干扰的用户设备的基站 （第二基站）发送功率协调信息， 从 而产生干扰的用户设备的基站能够根据功率协调信息调整该产生干扰的用户 设备在所述特定信道资源上的传输功率， 从而降低了用户设备之间的干扰。
本实施例中所述特定信道资源可以是近似空子帧 ABS资源， 也可以是正 常的业务子帧上的资源。 例如， 所述特定信道资源可以是灵活子帧 （flexible subframe )资源。灵活子帧的子帧类型可以变化，在某段时间内作为上行子帧， 在另一段时间内作为下行子帧。 特定信道资源的粒度可以是帧、 子帧、 时隙、 符号、 物理资源块组、 物理资源块、 子载波、 子频带等。
图 13是根据本发明另一实施例的干扰协调过程的示意流程图。 图 13中，
UE1是第一基站服务的用户设备， UE2是第二基站服务的用户设备，假设 UE2 在特定信道资源上对 UE1产生干扰。
131 , 第一基站的用户设备 UE1上报该 UE1在特定信道资源上的功率调 整余量 (Power Headroom)„
用户设备 UE1可以在上报的测量报告中携带所述功率调整余量。 功率调 整余量表征的范围越大， 说明该用户设备 UE1有越大的功率可调整区间。 反 之， 功率调整余量表征的范围越小， 则说明该用户设备 UE1的功率可调整区 间越小。 通常， 为了保证可靠的业务传输， 处于小区边缘的用户设备 UE1或 受到强干扰的用户设备 UE1 , 会增大传输功率。 因此， 这些用户设备上报的 功率可调整区间的范围通常较小。
例如， 功率调整余量可以包括该用户设备 UE1在所述特定信道资源上当 前的传输功率和最小传输功率之间的差。 功率调整余量的指示可以类似地按 照图 4的 42中描述的功率可调整区间信息的指示方法， 这里不再赘述。
132, 第一基站接收用户设备 UE1上报的功率调整余量之后， 根据功率调 整余量生成功率协调信息。 功率协调信息包括所述功率调整余量， 或包括所 述功率调整余量和所述特定信道资源的资源指示信息。
在生成功率协调信息时，可以综合考虑用户设备的功率调整余量表征的范 围和 /或用户设备受到的干扰程度等因素。
例如， 当用户设备上报的功率调整余量表征的范围较小时，则说明该用户 设备的传输功率已经很接近最大允许的发射功率， 此时需要进行干扰保护来 提高该用户设备传输的可靠性。
133, 第一基站传输所述功率协调信息给第二基站。
第一基站根据用户设备 UE1的位置信息、 第二基站的位置信息、 用户设 备 UE1 的测量信息， 和 /或第一基站的测量信息等， 确定出用户设备 UE1是 受到了哪个基站的用户设备 UE2对其造成了强干扰， 并传输所述功率协调信 息给产生干扰的用户设备 UE2的基站 (即第二基站)。
134, 第二基站接收第一基站传输的功率协调信息， 并根据所接收到的功 率协调信息， 调整第二基站的用户设备 UE2在特定信道资源上的传输功率， 降低对第一基站的用户设备 UE1的干扰。
例如， 当功率协调信息中包含了功率调整余量时，所述功率调整余量表征 的范围越小， 说明第一基站的用户设备越需要干扰保护。 第二基站可以根据 功率调整余量表征的范围程度， 相应地调整用户设备 UE2的传输功率。 即， 功率调整余量表征的范围越小， 第二基站调整用户设备 UE2的传输功率的幅 度越大。 例如， 此时第二基站可调整该第二基站服务的全部用户设备在全部 信道资源上的传输功率， 从而实现对 UE2的传输功率的调整。
或者，若功率协调信息中包含了特定信道资源的资源指示信息，则第二基 站可以降低用户设备 UE2在该资源指示信息所指示的特定信道资源上的传输 功率， 以降低对第一基站用户设备 UE1的干扰；
当功率协调信息中同时包含了特定信道资源的资源指示信息和功率调整 余量时， 则第二基站根据功率调整余量表征的范围程度， 相应地调整用户设 备 UE2在该资源指示信息所指示的特定信道资源上的传输功率。 例如， 此时 第二基站可调整该第二基站服务的全部用户设备在该资源指示信息所指示的 特定信道资源上的传输功率， 从而实现对 UE2的传输功率的调整。
此外，本实施例是针对用户设备业务传输的干扰保护方法，本实施例中所 述特定信道资源可以是近似空子帧 ABS资源， 也可以是正常的业务子帧上的 资源。 例如， 所述特定信道资源可以是灵活子帧 （flexible subframe ) 资源。 灵活子帧的子帧类型可以变化， 在某段时间内作为上行子帧， 在另一段时间 内作为下行子帧。 特定信道资源的粒度可以是帧、 子帧、 时隙、 符号、 物理 资源块组、 物理资源块、 子载波、 子频带等。
这样， 被干扰的用户设备向自己的基站 （第一基站）上报功率调整余量， 由该基站向产生干扰的用户设备的基站 （第二基站）发送功率协调信息， 从 而产生干扰的用户设备的基站能够根据功率协调信息调整该产生干扰的用户 设备在所述特定信道资源上的传输功率， 从而降低了用户设备之间的干扰。 图 14是根据本发明实施例的基站的示意框图。 图 14的基站 140执行图 11所示的方法和图 13中涉及第一基站的操作， 包括接收单元 141、 生成单元 142和发送单元 143。
接收单元 141 接收用户设备上报的所述用户设备在特定信道资源上的功 率调整余量。 生成单元 142根据所述功率调整余量生成功率协调信息， 所述 功率协调信息所述功率调整余量或所述功率协调信息包括所述功率调整余量 和所述特定信道资源的资源指示信息。 发送单元 143 向产生干扰的用户设备 的服务基站发送所述功率协调信息， 以便所述服务基站根据所述功率协调信 息调整所述产生干扰的用户设备在所述特定信道资源上的传输功率。
本实施例中所述特定信道资源可以是近似空子帧 ABS资源， 也可以是正 常的业务子帧上的资源。 例如， 所述特定信道资源可以是灵活子帧 （flexible subframe )资源。灵活子帧的子帧类型可以变化，在某段时间内作为上行子帧， 在另一段时间内作为下行子帧。 特定信道资源的粒度可以是帧、 子帧、 时隙、 符号、 物理资源块组、 物理资源块、 子载波、 子频带等。
这样，被干扰的用户设备向自己的基站上报功率调整余量， 由该基站向产 生干扰的用户设备的基站发送功率协调信息， 从而产生干扰的用户设备的基 站能够根据功率协调信息调整该产生干扰的用户设备在所述特定信道资源上 的传输功率， 从而降低了用户设备之间的干扰。
图 15是根据本发明实施例的基站的示意框图。 图 15的基站 150执行图 12所示的方法和图 13中涉及第二基站的操作，包括接收单元 151和调整单元 152。
接收单元 151接收第一基站发送的功率协调信息，所述功率协调信息由所 述第一基站根据所述第一基站的用户设备上报的在特定信道资源上的功率调 整余量而生成， 所述功率协调信息包括所述功率调整余量或所述功率协调信 息包括所述功率调整余量和所述特定信道资源的资源指示信息， 其中所述基 站 150 的用户设备在所述特定信道资源上对所述第一基站的用户设备产生干 扰。 调整单元 152根据所述功率协调信息， 调整所述基站 150的用户设备在 所述特定信道资源上的传输功率。
本实施例中所述特定信道资源可以是近似空子帧 ABS资源， 也可以是正 常的业务子帧上的资源。 例如， 所述特定信道资源可以是灵活子帧 （flexible subframe )资源。灵活子帧的子帧类型可以变化，在某段时间内作为上行子帧， 在另一段时间内作为下行子帧。 特定信道资源的粒度可以是帧、 子帧、 时隙、 符号、 物理资源块组、 物理资源块、 子载波、 子频带等。
这样，被干扰的用户设备向自己的基站上报功率调整余量， 由该基站向产 生干扰的用户设备的基站发送功率协调信息， 从而产生干扰的用户设备的基 站能够根据功率协调信息调整该产生干扰的用户设备在所述特定信道资源上 的传输功率， 从而降低了用户设备之间的干扰。
根据本发明实施例的通信系统可包括上述基站 60-80、 140、 150或用户设 备 100。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示 例的单元及算法步骤， 能够以电子硬件、 或者电子硬件与计算机软件的结合 来实现， 为了清楚地说明硬件和软件的可互换性， 在上述说明中已经按照功 能一般性地描述了各示例的组成及步骤。 这些功能究竟以硬件还是软件方式 来执行， 取决于技术方案的特定应用和设计约束条件。 专业技术人员可以对 每个特定的应用来使用不同方法来实现所描述的功能， 但是这种实现不应认 为超出本发明的范围。
所属领域的技术人员可以清楚地了解到， 为描述的方便和筒洁，上述描述 的系统、 装置和单元的具体工作过程， 可以参考前述方法实施例中的对应过 程， 在此不再赘述。
在本申请所提供的几个实施例中， 应该理解到， 所揭露的系统、 装置和方 法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示意 性的， 例如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可以 有另外的划分方式， 例如多个单元或组件可以结合或者可以集成到另一个系 统， 或一些特征可以忽略， 或不执行。 另一点， 所显示或讨论的相互之间的 耦合或直接耦合或通信连接可以是通过一些接口， 装置或单元的间接耦合或 通信连接， 可以是电性， 机械或其它的形式。 单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地方， 或 者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者 全部单元来实现本实施例方案的目的。
另外， 在本发明各个实施例中的各功能单元可以集成在一个处理单元中， 也可以是各个单元单独物理存在， 也可以两个或两个以上单元集成在一个单 元中。 上述集成的单元既可以采用硬件的形式实现， 也可以采用硬件和软件 功能单元组合的形式实现。
所述集成的单元如果以硬件和软件功能单元组合的形式实现并作为独立 的产品销售或使用时， 软件功能单元形式的部分可以存储在一个计算机可读 取存储介质中。 基于这样的理解， 本发明的技术方案本质上或者说对现有技 术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来， 该计算机软件产品存储在一个存储介质中， 包括若干指令用以使得一台计算 机设备（可以是个人计算机， 服务器， 或者网络设备等）执行本发明各个实 施例所述方法的全部或部分步骤。 而前述的存储介质包括： U盘、 移动硬盘、 只读存储器（ROM, Read-Only Memory ), 随机存取存储器（RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于 此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想 到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范 围应所述以权利要求的保护范围为准。

Claims

权利要求书
1、 一种干扰协调方法， 其特征在于， 包括：
确定侵害小区基站和所述侵害小区基站的干扰水平，并接收所述侵害小区基 站发送的功率协调信息， 所述功率协调信息用于指示所述侵害小区基站在特定 信道资源上的功率调整余量或指示所述侵害小区基站在特定信道资源上的最小 传输功率；
根据所述侵害小区基站的干扰水平和所述功率协调信息，确定所述侵害小区 基站中需要进行干扰协调的基站；
向所述需要进行干扰协调的基站发送功率调整请求，以使得所述需要进行干 扰协调的基站调整所述特定信道资源上的传输功率。
2、 如权利要求 1所述的方法， 其特征在于， 当所述功率协调信息用于指示 所述侵害小区基站在特定信道资源上的功率调整余量时，
所述侵害小区基站在特定信道资源上的功率调整余量包括所述侵害小区基 站在所述特定信道资源上当前的传输功率和最小传输功率之间的差；
所述根据所述侵害小区基站的干扰水平和所述功率协调信息，确定所述侵害 小区基站中需要进行干扰协调的基站包括：
根据所述侵害小区基站的干扰水平和所述功率调整余量对所述侵害小区基 站进行排序；
根据所述排序的结果确定所述需要进行干扰协调的基站。
3、 如权利要求 1所述的方法， 其特征在于， 当所述功率协调信息用于指示 所述侵害小区基站在特定信道资源上的最小传输功率时，
所述根据所述侵害小区基站的干扰水平和所述功率协调信息，确定需要进行 干扰协调的基站包括：
根据所述最小传输功率信息以及从用户设备接收的所述侵害小区基站在所 述特定信道资源上的当前传输功率信息获取所述侵害小区基站的功率可调整区 间信息， 或根据所述最小传输功率信息以及所述用户设备接收参考信号的接收 功率以及所述用户设备与所述侵害小区基站之间的路损信息获取所述侵害小区 基站的功率可调整区间信息；
根据所述侵害小区基站的干扰水平和所述功率可调整区间信息对所述侵害 小区基站进行优先级排序；
根据所述优先级排序的结果确定所述需要进行干扰协调的基站。
4、 如权利要求 1-3任一项所述的方法， 其特征在于， 所述特定信道资源为 近似空子帧 ABS资源；
所述向所述需要进行干扰协调的基站发送功率调整请求，以使得所述需要进 行干扰协调的基站调整所述特定信道资源上的传输功率， 包括：
向所述需要进行干扰协调的基站发送功率调整请求，以使得所述需要进行干 扰协调的基站调整 ABS资源上的传输功率、 ABS资源所占的频域的子载波上的 传输功率、 ABS资源所占的频域的物理资源块上的传输功率或 ABS资源所占的 频域的资源块组上的传输功率。
5、 一种干扰协调方法， 其特征在于， 包括：
向邻区基站发送功率协调信息，所述功率协调信息用于指示侵害小区基站在 特定信道资源上的功率调整余量或指示所述侵害小区基站在特定信道资源上的 最小传输功率；
接收所述邻区基站根据所述功率协调信息发送的功率调整请求；
根据所述功率调整请求， 调整所述特定信道资源上的传输功率。
6、 如权利要求 5所述的方法， 其特征在于， 当所述功率协调信息用于指示 所述侵害小区基站在特定信道资源上的功率调整余量时，
所述侵害小区基站在特定信道资源上的功率调整余量包括所述侵害小区基 站在所述特定信道资源上当前的传输功率和所述最小传输功率之间的差。
7、 如权利要求 5或 6所述的方法， 其特征在于， 所述特定信道资源为近似 空子帧 ABS资源；
根据所述功率调整请求， 调整所述特定信道资源上的传输功率， 包括： 根据所述功率调整请求， 调整 ABS资源上的传输功率、 ABS资源所占的频 域的子载波上的传输功率、 ABS 资源所占的频域的物理资源块上的传输功率或 ABS资源所占的频域的资源块组上的传输功率。
8、 一种发送测量报告的方法， 其特征在于， 包括：
获知用户设备的侵害小区基站在特定信道资源上的当前传输功率，或所述用 户设备与所述侵害小区基站之间进行数据传输的路损；
向所述用户设备的服务基站发送测量报告，所述测量报告中携带所述特定信 道资源上的当前传输功率， 或所述测量报告中携带所述路损以及所述用户设备 接收参考信号的接收功率， 以使得所述服务基站根据所述测量报告确定所述用 户设备的侵害小区基站的当前传输功率。
9、 如权利要求 8所述的方法， 其特征在于， 当所述测量报告中携带所述路 损信息以及所述用户设备接收参考信号的接收功率时，
所述服务基站根据所述测量报告确定所述用户设备的侵害小区基站的当前 传输功率， 包括：
所述服务基站将所述路损与所述用户设备接收参考信号的接收功率相加的 和作为所述用户设备的侵害小区基站的当前传输功率。
10、 一种干扰协调方法， 其特征在于， 包括：
接收用户设备上报的所述用户设备在特定信道资源上的功率调整余量； 向产生干扰的用户设备的服务基站发送功率协调信息，所述功率协调信息包 括所述功率调整余量或所述功率协调信息包括所述功率调整余量和所述特定信 道资源的资源指示信息， 以便所述服务基站根据所述功率协调信息调整所述产 生干扰的用户设备在所述特定信道资源上的传输功率。
11、 如权利要求 10所述的方法， 其特征在于， 所述功率调整余量包括所述 用户设备在所述特定信道资源上当前的传输功率和最小传输功率之间的差。
12、 如权利要求 10或 11所述的方法， 其特征在于， 当所述功率协调信息包 括所述功率调整余量和所述特定信道资源的资源指示信息时，
所述向产生干扰的用户设备的服务基站发送功率协调信息，以便所述服务基 站根据所述功率协调信息调整所述产生干扰的用户设备在所述特定信道资源上 的传输功率， 包括： 向产生干扰的用户设备的服务基站发送功率协调信息，以便所述服务基站根 据所述功率协调信息降低所述服务基站所服务的全部用户设备在所述资源指示 信息所指示的所述特定信道资源上的传输功率。
13、 如权利要求 10或 11所述的方法， 其特征在于， 当所述功率协调信息包 括所述功率调整余量时，
所述向产生干扰的用户设备的服务基站发送功率协调信息，以便所述服务基 站根据所述功率协调信息调整所述产生干扰的用户设备在所述特定信道资源上 的传输功率， 包括：
向产生干扰的用户设备的服务基站发送功率协调信息，以便所述服务基站根 据所述功率协调信息降低该服务基站所服务的全部用户设备在全部信道资源上 的传输功率。
14、 一种干扰协调方法， 其特征在于， 包括：
第二基站接收第一基站发送的功率协调信息，所述功率协调信息由所述第一 基站根据所述第一基站的用户设备上报的在特定信道资源上的功率调整余量而 生成， 所述功率协调信息包括所述功率调整余量或所述功率协调信息包括所述 功率调整余量和所述特定信道资源的资源指示信息， 其中所述第二基站的用户 设备在所述特定信道资源上对所述第一基站的用户设备产生干扰；
第二基站根据所述功率协调信息，调整所述第二基站的用户设备在所述特定 信道资源上的传输功率。
15、 如权利要求 14所述的方法， 其特征在于， 所述功率调整余量包括所述 第一基站的用户设备在所述特定信道资源上当前的传输功率和最小传输功率之 间的差。
16、 如权利要求 14或 15所述的方法， 其特征在于， 当所述功率协调信息包 括所述功率调整余量和所述特定信道资源的资源指示信息时，
所述第二基站根据所述功率协调信息，调整所述第二基站的用户设备在所述 特定信道资源上的传输功率， 包括：
所述第二基站根据所述功率协调信息，降低所述第二基站所服务的全部用户 设备在所述资源指示信息所指示的所述特定信道资源上的传输功率。
17、 如权利要求 14或 15所述的方法， 其特征在于， 当所述功率协调信息包 括所述功率调整余量时，
所述第二基站根据所述功率协调信息，调整所述第二基站的用户设备在所述 特定信道资源上的传输功率， 包括：
所述第二基站根据所述功率协调信息，降低所述第二基站所服务的全部用户 设备在全部信道资源上的传输功率。
18、 一种基站， 其特征在于， 包括：
识别单元， 用于确定侵害小区基站和所述侵害小区基站的干扰水平； 接收单元，用于接收所述侵害小区基站发送的功率协调信息，所述功率协调 信息用于指示所述侵害小区基站在特定信道资源上的功率调整余量或指示所述 侵害小区基站在特定信道资源上的最小传输功率；
确定单元，用于基于所述识别单元确定的侵害小区基站的干扰水平和所述接 收单元接收的功率协调信息， 确定所述侵害小区基站中需要进行干扰协调的基 站；
请求单元，用于向所述确定单元确定的需要进行干扰协调的基站发送功率调 整请求， 以使得所述需要进行干扰协调的基站调整所述特定信道资源上的传输 功率。
19、 如权利要求 18所述的基站， 其特征在于，
所述接收单元，具体用于接收所述侵害小区基站发送的功率协调信息，所述 功率协调信息用于指示所述侵害小区基站在特定信道资源上的功率调整余量， 所述侵害小区基站在特定信道资源上的功率调整余量包括所述侵害小区基站在 所述特定信道资源上当前的传输功率和最小传输功率之间的差；
所述确定单元，具体用于根据所述侵害小区基站的干扰水平和所述接收单元 接收的所述功率调整余量对所述侵害小区基站进行排序， 并根据所述排序的结 果确定所述需要进行干扰协调的基站。
20、 如权利要求 18所述的基站， 其特征在于， 所述接收单元，具体用于接收所述侵害小区基站发送的功率协调信息，所述 功率协调信息用于指示所述侵害小区基站在特定信道资源上的最小传输功率， 所述接收单元还用于从用户设备接收所述侵害小区基站在所述特定信道资源上 的当前传输功率信息， 或从用户设备接收所述用户设备接收参考信号的接收功 率和所述用户设备与所述侵害小区基站之间的路损信息；
所述确定单元，具体用于根据所述接收单元所接收的所述最小传输功率信息 和所述当前传输功率信息获取所述侵害小区基站的功率可调整区间信息， 或根 据所述接收单元所接收的所述最小传输功率信息以及所述接收功率和所述路损 信息获取所述侵害小区基站的功率可调整区间信息， 根据所述侵害小区基站的 干扰水平和所述功率可调整区间信息对所述侵害小区基站进行优先级排序， 根 据所述优先级排序的结果确定所述需要进行干扰协调的基站。
21、 如权利要求 18-20任一项所述的基站， 其特征在于， 所述特定信道资源 为近似空子帧 ABS资源，
所述请求单元，具体用于向所述确定单元确定的需要进行干扰协调的基站发 送功率调整请求，， 使得所述需要进行干扰协调的基站调整 ABS 资源上的传输 功率、 ABS资源所占的频域的子载波上的传输功率、 ABS资源所占的频域的物 理资源块上的传输功率或 ABS资源所占的频域的资源块组上的传输功率。
22、 一种基站， 其特征在于， 包括：
发送单元，用于向邻区基站发送功率协调信息，所述功率协调信息用于指示 基站在特定信道资源上的功率调整余量或指示所述基站在特定信道资源上的最 小传输功率；
接收单元，用于接收所述邻区基站根据所述功率协调信息发送的功率调整请 求；
调整单元，用于根据所述接收单元接收的功率调整请求，调整所述特定信道 资源上的传输功率。
23、 如权利要求 22所述的基站， 其特征在于，
所述发送单元，具体用于向邻区基站发送功率协调信息，所述功率协调信息 用于指示基站在特定信道资源上的功率调整余量， 所述在特定信道资源上的功 率调整余量包括所述侵害小区基站在所述特定信道资源上当前的传输功率和最 小传输功率之间的差。
24、 如权利要求 22或 23所述的基站， 其特征在于， 所述特定信道资源为近 似空子帧 ABS资源，
所述调整单元， 具体用于根据所述接收单元接收的功率调整请求调整 ABS 资源上的传输功率、 ABS资源所占的频域的子载波上的传输功率、 ABS资源所 占的频域的物理资源块上的传输功率或 ABS资源所占的频域的资源块组上的传 输功率。
25、 一种基站， 其特征在于， 包括：
接收单元，用于接收用户设备上报的所述用户设备在特定信道资源上的功率 调整余量；
生成单元，用于根据所述接收单元接收的所述功率调整余量生成功率协调信 息， 所述功率协调信息包括所述功率调整余量或所述功率协调信息包括所述功 率调整余量和所述特定信道资源的资源指示信息；
发送单元，用于向产生干扰的用户设备的服务基站发送所述生成单元生成的 功率协调信息， 以便所述服务基站根据所述功率协调信息调整所述产生干扰的 用户设备在所述特定信道资源上的传输功率。
26、 一种基站， 其特征在于， 包括：
接收单元，用于接收第一基站发送的功率协调信息，所述功率协调信息由所 述第一基站根据所述第一基站所服务的用户设备上报的在特定信道资源上的功 率调整余量而生成， 所述功率协调信息包括所述功率调整余量或所述功率协调 信息包括所述功率调整余量和所述特定信道资源的资源指示信息， 其中所述基 站的用户设备在所述特定信道资源上对所述第一基站的用户设备产生干扰； 调整单元，用于根据所述接收单元接收的功率协调信息，调整所述基站的用 户设备在所述特定信道资源上的传输功率。
27、 一种用户设备， 其特征在于， 包括： 获知单元，用于获知所述用户设备的侵害小区基站在特定信道资源上的当前 传输功率， 或所述用户设备与所述侵害小区基站之间进行数据传输的路损； 报告单元，用于向所述用户设备的服务基站发送测量报告，所述测量报告中 携带所述获知单元获知的特定信道资源上的当前传输功率， 或所述测量 4艮告中 携带所述获知单元获知的路损以及所述用户设备接收参考信号的接收功率， 以 使得所述服务基站根据所述测量报告确定所述用户设备的侵害小区基站的当前 传输功率。
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