WO2014146305A1 - Procédé, appareil et système d'attribution de sous-trame presque vide - Google Patents

Procédé, appareil et système d'attribution de sous-trame presque vide Download PDF

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Publication number
WO2014146305A1
WO2014146305A1 PCT/CN2013/073090 CN2013073090W WO2014146305A1 WO 2014146305 A1 WO2014146305 A1 WO 2014146305A1 CN 2013073090 W CN2013073090 W CN 2013073090W WO 2014146305 A1 WO2014146305 A1 WO 2014146305A1
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WO
WIPO (PCT)
Prior art keywords
base station
user equipment
subframe pattern
empty subframe
node domain
Prior art date
Application number
PCT/CN2013/073090
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English (en)
Chinese (zh)
Inventor
刘坚能
刘安
肖登坤
吴彤
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 CN201380002941.2A priority Critical patent/CN104303570A/zh
Priority to PCT/CN2013/073090 priority patent/WO2014146305A1/fr
Publication of WO2014146305A1 publication Critical patent/WO2014146305A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to an approximate null subframe allocation method, apparatus, and system. Background technique
  • Hetneteous Network Hetnet
  • the wireless communication field is under pressure from the explosive growth of data services.
  • Hetneteous Network, Hetnet a heterogeneous network (Hetneteous Network, Hetnet) technology has been proposed.
  • Hetnet consists of a macro area with large transmit power and wide coverage, and a small area with small transmit power, small coverage, simple configuration, and flexible distribution.
  • the micro cell and the macro cell may be deployed in the same frequency or in different frequency.
  • a micro base station (also referred to as a micro cell base station, that is, a base station serving a micro cell).
  • the macro base station can transmit a fixed "Almost Blank Subframe (AB S)," (eg, the AB S rated transmission frequency is fixed) in a fixed time slot within a certain time window.
  • AB S Almost Blank Subframe
  • the user equipment in the coverage area of the macro base station is not scheduled in the time window, and the macro base station may send a pattern of "approximate null subframe" to the micro base station where the user equipment in the CRE area is located, so that the micro base station will "
  • the approximate null subframe "pattern is sent to the user equipments in the CRE area to enable those user equipments to measure the corresponding Radio Resource Management (RRM) at the approximate null subframe time, and also causes the micro base station to transmit at the macro base station.
  • RRM Radio Resource Management
  • the user equipment in the CRE area is scheduled to reduce the co-channel interference from the macro base station and improve the transmission rate of the edge user.
  • sending a fixed AB S does not adaptively configure AB S according to the actual load of the micro cell and the macro cell. Therefore, the interference cannot be effectively reduced. Therefore, in a Long Term Evolution (LTE) scenario, a macro-cell and a cell in a coverage area of an evolved Node B (eNB) can be combined into a distributed antenna multi-input and multi-output system, and synchronous cooperation is adopted.
  • the method performs unified resource scheduling on all user equipments in the coverage of the eNB, so as to implement adaptive configuration of the ABS according to the actual load of the micro area and the macro cell.
  • Embodiments of the present invention provide an approximate null subframe allocation method, apparatus, and system, which can adaptively configure ABS according to real-time changes in channel state, thereby effectively reducing interference and improving system performance.
  • a first aspect of the embodiments of the present invention provides an approximate null subframe allocation method, including:
  • the radio resource management server receives a fading factor of the at least one first user equipment served by the base station from the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the first user equipment receives a signal from the base station ;
  • a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern according to the fading factor, the node domain approximate null subframe pattern set including at least one approximate null subframe pattern and the at least a node identifier corresponding to an empty sub-frame pattern;
  • the base station includes at least one of the macro base station and the micro base station.
  • the RRC server generates, according to the fading factor, a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern , including:
  • a base station that has a corresponding relationship with the first user equipment in the base station according to a fading factor of the first user equipment, where the corresponding relationship includes: a service relationship or an interference relationship, where The first user equipment and the serving base station of the first user equipment have the service relationship, and the second user equipment and the serving base station of the first user equipment have the interference relationship;
  • the RRC server acquires, according to the service relationship and the interference relationship, a user equipment that has uplink interference or downlink interference with the first user equipment, where the serving base station of the first user equipment uses the same network.
  • the first user equipment and the second user equipment are scheduled by the resource, there is uplink interference or downlink interference between the first user equipment and the second user equipment;
  • the RRC server obtains, by the RRC server, the approximate null subframe pattern of the node domain according to the service relationship, the interference relationship, and an uplink interference or downlink interference relationship between the first user equipment and the second user equipment.
  • the RRC server generates the node domain approximate null subframe pattern set according to the acquired node domain approximate null subframe pattern.
  • the RRC server determines, according to a fading factor of the first user equipment, that the first user equipment is corresponding to the first user equipment.
  • the base station of the relationship including:
  • the radio resource management server Determining, by the radio resource management server, a signal strength of the signal received by the first user equipment from at least one of the base stations according to a fading factor of the first user equipment; If the signal strength is greater than or equal to the set threshold, the RRC server determines that the base station corresponding to the signal strength is the base station that has a corresponding relationship with the first user equipment;
  • the corresponding relationship includes: the service relationship or the interference relationship.
  • the RRC server obtains uplink interference or downlink with the first user equipment according to the service relationship and the interference relationship.
  • Interfering user equipment including:
  • the RRC server generates a physical topology map or a physical topology table according to the service relationship and the interference relationship, where the physical topology map or the physical topology table includes: the identifier of the user equipment, the base station And the service relationship or the interference relationship between the first user equipment and the base station; wherein, when the base station and the first user equipment have the service relationship, the The identifier of the user equipment has a first correspondence with the identifier of the base station; when the base station and the first user equipment have the interference relationship, the identifier of the user equipment and the identifier of the base station are second. Correspondence relationship
  • the RRC server generates a user interference map or a user interference table according to the physical topology map or the physical topology table, where the user interference map or the user interference table includes an identifier of the first user equipment, and the An uplink interference or downlink interference relationship between the user equipment and the second user equipment, where the identifier of the first user equipment and the identifier of the second user equipment have a third correspondence.
  • the radio resource management server according to the service relationship, the interference relationship, the first user equipment, and the second user An uplink interference or downlink interference relationship between the devices, and obtaining an approximate null subframe pattern of the node domain, including:
  • the RRC server acquires the user interference map or the third user equipment in the user interference table, where the third user equipment is the first user equipment User equipment that does not have the uplink interference or downlink interference relationship;
  • the radio resource management server searches for a serving base station of the third user equipment in the physical topology map or the physical topology table;
  • the radio resource management server generates, according to the serving base station of the third user equipment, the node domain approximate null subframe pattern used by the base station.
  • a probability that the RRC resource sends the node domain approximate null subframe pattern set and uses the node domain approximate null subframe pattern Before being collected to the base station the method further includes:
  • the average probability set is obtained by equalizing the number of approximate null subframe patterns of the node domain in the node domain approximate null subframe pattern set according to the node number average space division probability complete set of the node domain approximate null subframe pattern. Segment probability set.
  • a probability that the RRC resource sends the node domain approximate null subframe pattern set and uses the node domain approximate null subframe pattern Before the base station further includes:
  • the RRC server obtains the approximate null subframe using the node domain according to the number of the null-subframe pattern of the node domain and the average bit rate of the first user equipment in the node domain approximate null subframe pattern set. Pattern probability set.
  • a second aspect of the embodiments of the present invention further provides an approximate null subframe allocation method, including:
  • a fading factor of the user equipment to a radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern, where the node domain approximates an empty subframe pattern
  • the set includes at least one approximate null subframe pattern and a node identifier corresponding to the at least one approximate null subframe pattern;
  • the base station receives the node domain approximate null subframe pattern set from the radio resource management server and a probability set using a node domain approximate null subframe pattern;
  • the base station allocates an approximate null subframe according to the node domain approximate null subframe pattern set and the probability set corresponding to the node domain approximate null subframe pattern, and schedules the base station service according to the approximate null subframe. At least one of the user devices.
  • the base station includes at least one of the macro base station and the micro base station.
  • the acquiring, by the base station, a fading factor of the at least one user equipment that is served by the base station includes:
  • the base station Receiving, by the base station, the fading of the user equipment reported by the user equipment a falling factor, the fading factor being the user equipment according to the user equipment
  • a probability that the base station corresponds to the node domain approximate null subframe pattern set and the using the node domain approximate null subframe pattern according to the node domain Before the approximate null subframe is allocated by using the preset policy further includes:
  • the base station adopts, according to the probability that the node domain approximate null subframe pattern set and the node domain approximate null subframe pattern are used
  • the preset policy allocates an approximate null subframe, and schedules the at least one user equipment served by the base station according to the approximate null subframe, including:
  • the base station If the pseudo random number is included in the probability set, the base station generates a time domain approximate null subframe pattern according to the node domain approximate null subframe pattern corresponding to the probability set, where the time domain approximate null subframe pattern is used to indicate the location The mode of the approximate null subframe is described; the base station allocates the approximate null subframe according to the time domain approximate null subframe pattern, and schedules at least one of the user equipments served by the base station according to the allocated approximate null subframe.
  • the method when the base station is a macro base station, generating, by the base station, a time domain according to a node domain approximate null subframe pattern corresponding to the probability set After approximating the null subframe pattern, the method further includes: The base station sends the time domain approximate null subframe pattern to at least one micro base station in the coverage of the base station, so that the micro base station schedules at least one of the micro base station services according to the time domain approximate null subframe pattern.
  • the base station sends the time domain approximate null subframe pattern to at least one micro base station in the coverage of the base station, so that the micro base station schedules at least one of the micro base station services according to the time domain approximate null subframe pattern.
  • the performing, by the base station, the at least one user equipment that is served by the base station according to the allocated approximate null subframe specifically includes:
  • the base station schedules at least one of the user equipments served by the base station according to the allocated approximate null subframe and the channel quality indication CQI reported by the user equipment.
  • the method further includes:
  • An average bit rate of the device adjusts the probability set using the node domain approximate null subframe pattern
  • the superframe includes at least one radio frame.
  • a third aspect of the embodiments of the present invention further provides a radio resource management server, including: a receiving unit, configured to receive, by a base station, a fading factor of at least one first user equipment served by the base station, where the fading factor is used to indicate Determining a degree of attenuation of the signal when the first user equipment receives a signal from the base station;
  • a generating unit configured to generate, according to the fading factor received by the receiving unit, a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern; and a sending unit, configured to send the node generated by the generating unit a domain approximation null subframe pattern set and a probability set using the node domain approximation null subframe pattern to the base station, such that the base station approximates a null subframe pattern according to the node domain and the approximate null subframe pattern using the node domain
  • the probability set is assigned an approximate null subframe.
  • the base station includes at least one of the macro base station and the micro base station.
  • the generating unit includes:
  • Determining a subunit configured to determine, according to a fading factor of the first user equipment that is received by the receiving unit, a base station that has a corresponding relationship with the first user equipment in the base station; where the corresponding relationship includes: a relationship between the first user equipment and the serving base station of the first user equipment, and the second user equipment and the serving base station of the first user equipment have the interference relationship;
  • a first acquiring subunit configured to acquire, according to the service relationship and the interference relationship determined by the determining subunit, a user equipment that has uplink interference or downlink interference with the first user equipment, where, when the first When the serving base station of the user equipment schedules the first user equipment and the second user equipment by using the same network resource, there is uplink interference or downlink interference between the first user equipment and the second user equipment;
  • a second acquiring subunit configured to determine, according to the determining, the service relationship, the interference relationship, and the first user equipment and the second user equipment acquired by the first acquiring subunit Obtaining an approximate null subframe pattern of the node domain according to an uplink interference or a downlink interference relationship;
  • Generating a subunit configured to generate, according to the node domain approximate null subframe pattern that the second acquiring subunit has acquired, the node domain approximate null subframe pattern set.
  • the determining the subunit includes:
  • a first determining module configured to determine, according to a fading factor of the first user equipment received by the receiving unit, a signal strength of the first user equipment to receive a signal from at least one of the base stations;
  • a second determining module configured to determine, according to the threshold that the signal strength determined by the first determining module is greater than or equal to a set threshold, that the base station corresponding to the signal strength has a corresponding relationship with the first user equipment Base station
  • the first acquiring subunit includes:
  • a first generation module configured to generate a physical topology map or a physical topology table according to the service relationship and the interference relationship determined by the determining subunit, where the physical topology map or the physical topology table includes: An identifier of the user equipment, an identifier of the base station, and the service relationship or the interference relationship between the first user equipment and the base station; wherein, when the base station and the first user equipment exist When the service relationship is described, the identifier of the first user equipment has a first corresponding relationship with the identifier of the base station; when the interference relationship exists between the base station and the first user equipment, the identifier of the user equipment is The identifier of the base station has a second correspondence relationship;
  • a second generating module configured to generate a user interference graph or a user interference table according to the physical topology map or the physical topology table generated by the first generating module, where the user interference graph or the user interference table includes the first An identifier of the user equipment, and an uplink interference or a downlink interference relationship between the first user equipment and the second user equipment, where the identifier of the first user equipment and the identifier of the second user equipment are Three correspondence.
  • the second obtaining subunit includes:
  • An acquiring module configured to acquire the user interference graph generated by the first acquiring subunit or a third user equipment in the user interference table, where the third user equipment does not exist with the first user equipment User equipment describing uplink interference or downlink interference relationship;
  • a locating module configured to search, in the physical topology map or the physical topology table generated by the first acquiring subunit, a serving base station of the third user equipment acquired by the acquiring module;
  • a third generation module configured to generate, according to the serving base station of the third user equipment that is found by the searching module, the node domain approximate null subframe used by the base station Like.
  • the radio resource management server further includes:
  • an acquiring unit configured to: after the sending unit sends the node domain approximate null subframe pattern set and use the node domain approximate null subframe pattern probability set to the base station, the node domain generated according to the generating unit Approximating the number of the null-subframe patterns of the node domain in the null subframe design set, and determining an average probability set of using at least one of the node domains to approximate the null subframe pattern;
  • the average probability set is obtained by equalizing the number of approximate null subframe patterns of the node domain in the node domain approximate null subframe pattern set according to the node number average space division probability complete set of the node domain approximate null subframe pattern. Segment probability set.
  • the receiving unit is further configured to send, in the sending unit, the node domain approximate null subframe pattern set and use the node domain Obtaining an average bit rate of at least one of the first user equipments served by the base station from the base station before the probability of the null subframe pattern is up to the base station, where an average bit rate of the first user equipment is the base station Receiving, by the first user equipment, the average bit rate of the data sent by the base station, where the superframe includes at least one radio frame, and the acquiring unit is further configured to generate according to the generated The number of the node domain approximate null subframe pattern in the node domain approximate null subframe pattern set generated by the unit and the average bit rate of the first user equipment received by the receiving unit acquires the node domain approximation Empty sub-frame pattern probability set.
  • a fourth aspect of the embodiments of the present invention provides a base station, including:
  • An acquiring unit configured to acquire a fading factor of the at least one user equipment served by the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the user equipment receives a signal from the base station;
  • a sending unit configured to send the fading of the user equipment acquired by the acquiring unit a factor to a radio resource management server, the fading factor is used to generate a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern, the node domain approximate null subframe pattern set including at least one approximate null subframe pattern and Determining at least one node identifier corresponding to the approximate null subframe pattern;
  • a receiving unit configured to receive, from the radio resource management server, the node domain approximate null subframe pattern set and a probability set using a node domain approximate null subframe pattern, where the node domain approximates an empty subframe pattern set and uses a node domain approximate null
  • the probability set of the frame pattern is generated by the RRC server according to the fading factor of the user equipment sent by the sending unit;
  • an allocating unit configured to allocate an approximate null subframe according to the node domain approximate null subframe pattern set received by the receiving unit and the probability set corresponding to the node domain approximate null subframe pattern, according to the preset policy, and according to the The approximate null subframe schedules at least one of the user equipments served by the base station.
  • the base station includes at least one of the macro base station and the micro base station.
  • the acquiring unit includes:
  • a receiving subunit configured to receive a reference signal received power RSRP of the user equipment reported by the at least one user equipment
  • a calculating subunit configured to calculate a fading factor of the at least one user equipment according to the RSRP received by the receiving subunit;
  • the sub-acquisition unit is further configured to receive a fading factor of the user equipment reported by the user equipment, where the fading factor is calculated by the user equipment according to the RSRP of the user equipment.
  • the base station further includes: a generating unit, configured to: before the allocation unit allocates an approximate null subframe according to the node domain approximate null subframe pattern set and the probability corresponding to the using the node domain approximate null subframe pattern, according to the base station
  • the time domain approximation null subframe pattern period in the working mode of the network generates a pseudo random sequence, and generates a pseudo random number corresponding to the pseudo random sequence; the length of the pseudo random sequence is the same as the time domain approximate null subframe pattern period .
  • the allocating unit includes:
  • a comparison subunit configured to compare the pseudo random number generated by the generating unit with the probability set received by the receiving unit using the node domain approximate null subframe pattern; and generate a subunit for comparing Comparing the sub-units to obtain the pseudo-random number is included in the probability set, and generating a time-domain approximate null subframe pattern according to the node-domain approximate null subframe pattern corresponding to the probability set, where the time-domain approximate null subframe pattern is used to indicate a pattern Pattern of approximate null subframes;
  • an allocation subunit configured to allocate the approximate null subframe according to the time domain approximate null subframe pattern generated by the generating subunit, and schedule at least one user of the base station service according to the allocated approximate null subframe device.
  • the sending unit is further configured to: when the base station is a macro base station, respond to the segmentation probability according to the segmentation probability After the node domain approximate null subframe pattern generates the time domain approximate null subframe pattern, the time domain approximate null subframe pattern is sent to at least one micro base station in the coverage of the base station, so that the micro base station approximates according to the time domain An empty subframe pattern is used to schedule at least one of the user equipments of the micro base station service.
  • the allocating subunit is further configured to indicate a CQI according to the allocated approximate null subframe and the channel quality reported by the user equipment. Scheduling at least one of the user equipments served by the base station.
  • the base station further includes:
  • a statistic unit configured to collect an average bit rate of the signal received by the user equipment from the base station
  • the sending unit is further configured to send an average bit rate of the user equipment that is counted by the statistics unit to the radio resource management server, so that the radio resource management server adjusts according to an average bit rate of the user equipment. Determining a probability set of the null subframe pattern using the node domain;
  • the superframe includes at least one radio frame.
  • a fifth aspect of the embodiments of the present invention provides a radio resource management server, including:
  • a receiver configured to receive a fading factor of the at least one first user equipment served by the base station from the base station, where the fading factor is used to indicate that the first user equipment receives the signal from the base station and attenuates the signal Degree
  • a processor configured to generate, according to the fading factor received by the receiver, a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern, where the node domain approximate null subframe pattern set includes at least one approximate null subframe a pattern and a node identifier corresponding to the at least one approximate null subframe pattern;
  • a transmitter configured to send the node domain approximate null subframe pattern set generated by the processor, and use a probability set of the node domain approximate null subframe pattern to the base station, so that the base station approximates according to the node domain
  • the null subframe pattern and the probability set using the node domain approximate null subframe pattern are allocated approximate null subframes.
  • the base station includes at least one of the macro base station and the micro base station.
  • the processor is further configured to: in the base station, according to a fading factor of the first user equipment received by the receiver Determining a correspondence with the first user equipment The base station, where the corresponding relationship includes: a service relationship or an interference relationship, where the first user equipment and the serving base station of the first user equipment have the service relationship, and the second user equipment and the first user equipment The serving base station has the interference relationship, and the user equipment that has uplink interference or downlink interference with the first user equipment is obtained according to the service relationship and the interference relationship, where the serving base station of the first user equipment is used.
  • the first user equipment and the second user equipment When the first user equipment and the second user equipment are scheduled by the same network resource, the first user equipment and the second user equipment have uplink interference or downlink interference; according to the service relationship, An interference relationship, and an uplink interference or downlink interference relationship between the first user equipment and the second user equipment, acquiring an approximate null subframe pattern of the node domain; generating the approximate null subframe pattern according to the acquired node domain The node domain approximates a set of null subframe patterns.
  • the processor is further configured to determine, according to a fading factor of the first user equipment received by the receiver, the first The user equipment receives the signal strength of the signal from the at least one of the base stations; if the signal strength is greater than or equal to the set threshold, determining that the base station corresponding to the signal strength is in the correspondence relationship with the first user equipment Base station
  • the corresponding relationship includes: the service relationship or the interference relationship.
  • the processor is further configured to generate a physical topology map or a physical topology table according to the service relationship and the interference relationship
  • the physical topology map or the physical topology table includes: an identifier of the user equipment, an identifier of the base station, and the service relationship or the interference relationship between the first user equipment and the base station;
  • the identifier of the first user equipment has a first correspondence with the identifier of the base station;
  • the identifier of the user equipment has a second correspondence with the identifier of the base station; and is generated according to the physical topology map or the physical topology table.
  • the user interference map or the user interference table includes an identifier of the first user equipment, and an uplink interference or downlink interference relationship between the first user equipment and the second user equipment
  • the first user equipment identifier has a third corresponding relationship with the identifier of the second user equipment.
  • the processor is further configured to acquire the user interference map or a third user equipment in the user interference table, where The third user equipment is a user equipment that does not have the uplink interference or downlink interference relationship with the first user equipment; in the physical topology map or the physical topology table, searching for the third user equipment Serving a base station; generating, according to the serving base station of the third user equipment, the node domain approximate null subframe pattern used by the base station.
  • the processor is further configured to send, in the sender, the node domain approximate null subframe pattern set and use the node domain Before approximating the probability set of the null subframe pattern to the base station, determining, according to the number of approximate null subframe patterns of the node domain in the node domain approximate null subframe pattern set, determining an average of the approximate null subframe pattern using at least one of the node domains Probability set
  • the average probability set is obtained by equalizing the number of approximate null subframe patterns of the node domain in the node domain approximate null subframe pattern set according to the node number average space division probability complete set of the node domain approximate null subframe pattern. Segment probability set.
  • the receiver is further configured to send, by the sender, the node domain approximate null subframe pattern set and use the node domain Obtaining an average bit rate of at least one of the first user equipments served by the base station from the base station before the probability set of the null subframe pattern is sent to the base station, where an average bit rate of the first user equipment is Receiving, by the base station, the average bit rate of the data sent by the base station, where the superframe includes at least one radio frame, in a superframe time;
  • the processor is further configured to acquire, according to the number of the neighboring null subframe patterns of the node domain in the node domain approximate null subframe pattern set, and the average bit rate of the first user equipment received by the receiver.
  • the sixth aspect of the embodiment of the present invention is to provide a base station, including:
  • a processor configured to acquire a fading factor of the at least one user equipment served by the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the user equipment receives a signal from the base station;
  • a transmitter configured to send a fading factor of the user equipment acquired by the processor to a radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern, where The node domain approximate null subframe pattern set includes at least one approximate null subframe pattern and a node identifier corresponding to the at least one approximate null subframe pattern;
  • a receiver configured to receive, from the radio resource management server, the node domain approximate null subframe pattern set and a probability set using a node domain approximate null subframe pattern, the node domain approximate null subframe pattern set and use node domain approximation
  • the probability set of the null subframe pattern is generated by the RRC server according to a fading factor of the user equipment received from the transmitter;
  • the processor is configured to allocate an approximate null subframe according to the node domain approximate null subframe pattern set received by the receiver and the probability set corresponding to the node domain approximate null subframe pattern, and according to a preset policy, The approximate null subframe schedules at least one of the user equipments served by the base station.
  • the base station includes at least one of the macro base station and the micro base station.
  • the receiver is further configured to receive, by the at least one reference signal received power RSRP of the user equipment reported by the user equipment;
  • the processor is further configured to calculate, according to the RSRP received by the receiver, a fading factor of at least one of the user equipments;
  • the receiver is further configured to receive a fading factor of the user equipment reported by the at least one user equipment, where the fading factor is calculated by the user equipment according to the RSRP of the user equipment.
  • the processor is further configured to perform, according to the node domain, approximate a null subframe pattern set and use the node domain approximation Before the probability of the null subframe pattern is allocated by using the preset policy, the pseudo-random sequence is generated according to the time domain approximate null subframe pattern period in the working mode of the network where the base station is located, and the pseudo-random sequence corresponding to the pseudo-random sequence is generated. a random number; the length of the pseudo-random sequence is the same as the time-domain approximate null subframe pattern period.
  • the processor is further configured to compare the pseudo random number with the probability set of using the node domain to approximate a null subframe pattern And if the pseudo random number is included in the probability set, generating a time domain approximate null subframe pattern according to the node domain approximate null subframe pattern corresponding to the probability set, where the time domain approximate null subframe pattern is used to indicate the approximate a mode pattern of the null subframe; allocating the approximate null subframe according to the time domain approximate null subframe pattern, and scheduling at least one of the user equipments served by the base station according to the allocated approximate null subframe.
  • the transmitter is further configured to: when the base station is a macro base station, the processor corresponds to the probability set according to the After the node domain approximate null subframe pattern generates a time domain approximate null subframe pattern, the time domain approximate null subframe pattern is sent to at least one micro base station in the coverage of the base station, so that the micro base station approximates the space according to the time domain. Frame pattern, scheduling at least one of the user equipments of the micro base station service.
  • the processor is further configured to: perform CQI scheduling according to the allocated approximate null subframe and the channel quality indicator reported by the user equipment. At least one of the user equipments served by the base station.
  • the processor is further configured to collect, by the user equipment, an average bit rate of a signal received by the user equipment from the base station;
  • the transmitter is further configured to send an average bit rate of the user equipment that is counted by the processor to the radio resource management server, so that the radio resource management server adjusts according to an average bit rate of the user equipment. Determining a probability set of the null subframe pattern using the node domain;
  • the superframe includes at least one radio frame.
  • a seventh aspect of the embodiments of the present invention further provides an approximate null subframe allocation system, including: a radio resource management server, at least two base stations, and at least two user equipments; and the radio resource management server, configured to receive from a base station a fading factor of the at least one user equipment served by the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the user equipment receives a signal from the base station; and generate at least one node domain according to the fading factor a node domain approximating a null subframe pattern set of the approximate null subframe pattern; transmitting the node domain approximate null subframe pattern set and using the node domain approximate null subframe pattern probability set to the base station, so that the base station according to the node A domain approximate null subframe pattern and the probability set using the node domain approximate null subframe pattern are allocated approximate null subframes;
  • the base station is configured to acquire a fading factor of the at least one user equipment served by the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the user equipment receives a signal from the base station; a fading factor of the device to the radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern set, where the node domain approximate null subframe pattern set includes at least one node domain approximation a null subframe pattern; receiving, from the radio resource management server, the node domain approximate null subframe pattern set and a probability set using a node domain approximate null subframe pattern; according to the node domain approximate null subframe pattern set and the using The probability set corresponding to the null-subframe pattern of the node-domain is configured to allocate an approximate null subframe by using a preset policy, and scheduling at least one user equipment served by the base station according to the approximate null subframe;
  • the user equipment is configured to report the RSRP of the user equipment to the base station, so that the base station calculates a fading factor of the user equipment according to the RSRP; or report the fading of the user equipment to the base station.
  • a factor the fading factor is calculated by the user equipment according to the RSRP of the user equipment.
  • the base station acquires the fading factor of the at least one user equipment served by the base station, and then sends the fading factor of the user equipment to the radio resource management server, and the fading factor is used to generate the node domain approximation
  • the null subframe pattern set receives the node domain approximate null subframe pattern set from the RRC server and the probability set using the node domain approximate null subframe pattern, and finally corresponds to the node domain approximate null subframe pattern set and the node domain approximate null subframe pattern.
  • the probability set allocates an approximate null subframe by using a preset policy, and schedules at least one user equipment served by the base station according to the approximate null subframe.
  • the base station can adaptively configure the AB S according to the node domain approximate empty subframe pattern, that is, the real-time change of the channel state, so that the base station can be efficiently configured. Reduce interference and improve system performance.
  • FIG. 1 is a flowchart of an approximate null subframe allocation method according to Embodiment 1 of the present invention
  • 2 is a flowchart of an approximate null subframe allocation method according to Embodiment 2 of the present invention
  • FIG. 3 is a flowchart of a method for approximating null subframe allocation according to Embodiment 3 of the present invention
  • FIG. 4 is a flowchart of Embodiment 3 of the present invention
  • Embodiment 3 is a physical topology diagram of Embodiment 3 of the present invention.
  • Embodiment 6 is a diagram of user interference in Embodiment 3 of the present invention.
  • Embodiment 7 is a physical topology table in Embodiment 3 of the present invention.
  • Embodiment 8 is a user interference table in Embodiment 3 of the present invention.
  • FIG. 9 is a schematic structural diagram of a radio resource management server according to Embodiment 4 of the present invention.
  • FIG. 10 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention.
  • FIG. 1 is a schematic diagram showing the composition of a radio resource management server in Embodiment 6 of the present invention.
  • FIG. 12 is a schematic structural diagram of a base station according to Embodiment 7 of the present invention.
  • FIG. 13 is a schematic diagram showing the composition of an approximate null subframe system in Embodiment 8 of the present invention.
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • Time Division Multiple Access Time Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency-Division Multiple Access
  • SC-FDMA Single-Carrier FDMA
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE Long Term Evolution
  • the user equipment which may be a wireless terminal or a wired terminal, may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • PC S Personal Communication Service
  • Cordless Phone Session Initiation Protocol
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • Personal Digital Assistant Personal Digital Assistant
  • a wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, an Access Point, Remote terminal (remote terminal)
  • a base station (e.g., an access point) can be a device in an access network that communicates with wireless terminals over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station can be GSM or CDMA
  • the base station (BTS, Base Transceiver Station) may also be a base station (NodeB) in WCDMA, or may be an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, which is not limited by the present invention. .
  • the base station controller may be a base station controller (BSC) in GSM or CDMA, or may be a radio network controller (RNC) in WCDMA, which is not limited by the present invention.
  • BSC base station controller
  • RNC radio network controller
  • system and “network” are often used interchangeably herein.
  • the term “and/or” in this context is merely an association that describes the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • An embodiment of the present invention provides an approximate null subframe allocation method, as shown in FIG. 1 , including:
  • the radio resource management server receives a fading factor of the at least one first user equipment served by the base station of the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the first user equipment receives the signal from the base station.
  • the Radio Resource Management Server is an embodiment of the present invention for adaptively configuring an Almost Blank Subframe (ABS) according to a real-time change of a channel state, thereby achieving high efficiency and reducing interference.
  • the resource management server introduced in Heterogeneous Network (Hetnet).
  • Hetnet Heterogeneous Network
  • the main function of the RRMS is to coordinate the resources between the base stations, so that the macro base station and the micro base station can adaptively configure the ABS according to the real-time change of the channel state, thereby reducing the generation of the same frequency by the macro cell and the cell.
  • Co-channel interference improves system performance.
  • the radio resource management server generates, according to the fading factor, a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern.
  • the node domain approximate null subframe pattern set includes at least one approximate null subframe pattern and at least one node identifier corresponding to the approximate null subframe pattern.
  • the method for the radio resource management server to generate the node domain approximate null subframe pattern set including the at least one node domain approximate null subframe pattern according to the fading factor may include: the radio resource management server determines, according to the fading factor of the first user equipment, the base station The first user equipment has a corresponding base station; the corresponding relationship includes: a service relationship or an interference relationship, where the first user equipment has a service relationship with the serving base station of the first user equipment; the radio resource management server acquires according to the service relationship and the interference relationship The user equipment of the first user equipment has uplink interference or downlink interference, where the first user equipment and the second user equipment are scheduled when the serving base station of the first user equipment uses the same network resource to schedule the first user equipment and the second user equipment.
  • the uplink interference or downlink interference relationship between the devices acquires an approximate null subframe pattern of the node domain; the RRC server generates a node domain approximate null subframe pattern set according to the acquired node domain approximate null subframe pattern.
  • the determining, by the radio resource management server, the base station in the base station according to the fading factor of the first user equipment may include: determining, by the radio resource management server, the first user according to the fading factor of the first user equipment
  • the device receives the signal strength of the signal from the at least one base station; if the signal strength is greater than or equal to the set threshold, the RRC determines that the base station corresponding to the signal strength is a base station that has a corresponding relationship with the user equipment; wherein the correspondence includes: Relationship or interference relationship.
  • the radio resource management server acquires, by the service relationship and the interference relationship, the radio resource management server of the user equipment that has uplink interference or downlink interference with the first user equipment, and obtains uplink interference or downlink interference with the user equipment according to the service connection and the interference connection.
  • the user equipment may include: the radio resource management server generates a physical topology map or a physical topology table according to the service relationship and the interference relationship, where the physical topology map or the physical topology table includes: an identifier of the user equipment, an identifier of the base station, and the first User setting a service relationship or an interference relationship between the base station and the base station; wherein, when the base station and the first user equipment have a service relationship, the identifier of the first user equipment has a first correspondence with the identifier of the base station; when the base station and the first user equipment exist In the interference relationship, the identifier of the user equipment has a second correspondence with the identifier of the base station; the radio resource management server generates a user interference graph or a user interference table according to the physical topology map or the physical topology table, and the user interference graph or the user interference table includes the first An identifier of a user equipment, and an uplink interference or downlink interference relationship between the first user equipment and the second user equipment, where the identifier of the first
  • the RRC server may obtain the node domain approximate null subframe pattern according to the service relationship, the interference relationship, the uplink interference or the downlink interference relationship between the first user equipment and the second user equipment, and may include: a third user equipment in the user interference graph or the user interference table, where the third user equipment is a user equipment that does not have an interference relationship with the serving base station of the first user equipment, and the third user equipment does not have uplink interference with the first user equipment or a user equipment of a downlink interference relationship; the radio resource management server searches for a serving base station of the third user equipment in a physical topology map or a physical topology table; and the radio resource management server generates, according to the serving base station of the third user equipment, the base station The node domain approximates an empty sub-frame pattern.
  • the radio resource management server sends a node domain approximate null subframe pattern set and a probability set using the node domain approximate null subframe pattern to the base station, so that the base station approximates the null subframe pattern according to the node domain and uses the node domain to approximate the null subframe pattern probability.
  • the set allocates approximately null subframes.
  • the probability set of the node domain approximate null subframe pattern sent by the RRC server to the base station is the number of the approximated null subframe pattern of the node domain in the node domain approximate null subframe pattern set, and the average probability set is allocated according to the node domain approximate null subframe pattern set.
  • the radio resource management server determines the probability set according to the number of the node domain approximate null subframe pattern in the node domain approximation null subframe pattern set and the average bit rate of the user equipment.
  • the radio resource management server may adjust the probability set using the node domain approximate null subframe pattern in real time to ensure that the base station can also The approximate null subframe is dynamically allocated according to the real-time change of the channel state.
  • the radio resource management server may receive the at least one user equipment served by the base station from the base station.
  • the average bit rate, the average bit rate of the user equipment is the average bit rate of the data transmitted by the base station by the statistical user equipment in a superframe time, wherein the super frame includes at least one radio frame.
  • the radio resource management server receives a fading factor of at least one user equipment served by a base station from a base station, and then generates a node domain approximate null including at least one node domain approximate null subframe pattern according to the fading factor.
  • a frame pattern set, a retransmission node domain approximate null subframe pattern set and a probability set using the node domain approximate null subframe pattern to the base station, so that the base station approximates the null subframe pattern according to the node domain and uses the node domain approximate null subframe pattern probability set Approximate empty sub-frames are allocated.
  • the base station can adaptively configure the ABS according to the node domain approximation of the null subframe pattern, that is, the real-time change of the channel state, so that the interference can be effectively reduced. , improve system performance.
  • An embodiment of the present invention provides an approximate null subframe allocation method, as shown in FIG. 2, including:
  • the S20 base station acquires a fading factor of the at least one user equipment served by the base station, where the fading factor is used to indicate the degree of attenuation of the signal when the user equipment receives the signal from the base station.
  • the base station acquiring the fading factor of the at least one user equipment served by the base station may include: the base station receiving the reference signal receiving power (RSRP) of the user equipment reported by the at least one user equipment; the base station calculating at least the RSRP according to the RSRP The fading factor of a user equipment.
  • the base station acquiring the fading factor of the at least one user equipment served by the base station may include: the base station receiving the fading factor of the user equipment reported by the at least one user equipment, where the fading factor is calculated by the user equipment according to the RSRP of the user equipment.
  • the base station in the embodiment of the present invention includes at least one of the macro base station and the micro base station.
  • the base station sends a fading factor of the user equipment to the radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern set, and the node domain approximate null subframe pattern set includes at least one node domain approximate null subframe pattern.
  • the fading factor (large-scale fading factor) of the user equipment is used to indicate the degree of attenuation of the signal when the user equipment receives the signal from the base station, and the fading factor of the user equipment sent by the base station to the RRC server includes the coverage of the base station.
  • the fading factor of all user equipment is used to indicate the degree of attenuation of the signal when the user equipment receives the signal from the base station, and the fading factor of the user equipment sent by the base station to the RRC server includes the coverage of the base station.
  • the fading factor of all user equipment is used to indicate the degree of attenuation of the signal when the user equipment receives the signal from the base station, and the fading factor of the user equipment sent by the base station to the RRC server includes the coverage of the base station.
  • the fading factor of all user equipment is used to indicate the degree of attenuation of the signal when the user equipment receives the signal from the base station, and the fading factor of the user equipment sent by the base station to the RRC server
  • the base station receives a node domain approximate null subframe from the radio resource management server, and a probability set that uses the node domain approximate null subframe pattern.
  • the base station allocates an approximate null subframe according to a node domain approximate null subframe pattern set and a probability set corresponding to the node domain approximate null subframe pattern, and schedules at least one user equipment served by the base station according to the approximate null subframe.
  • the base station allocates the approximate null subframe according to the node domain approximate null subframe pattern set and the probability set corresponding to the node domain approximate null subframe pattern, and may include: the base station approximates the space according to the time domain in the working mode of the network where the base station is located.
  • a pattern period generates a pseudo-random sequence and generates a pseudo-random number corresponding to the pseudo-random sequence; the length of the pseudo-random sequence is the same as the time-domain approximate null subframe pattern period, and the working mode includes frequency division duplex , FDD), or Time Division Duplex (TDD); the probability set of the base station comparing the pseudo-random number with the approximate null subframe pattern using the node domain; if the pseudo-random number is included in the probability set, the base station is based on the node corresponding to the probability set
  • the domain approximate null subframe pattern generates a time domain approximate null subframe pattern, and the time domain approximate null subframe pattern is used to indicate a mode pattern of the approximate null subframe; the base station allocates an approximate null subframe according to the time domain approximate null subframe pattern, and according to the allocated The approximate null subframe schedules at least one user equipment served by the base station.
  • the method of the embodiment of the present invention further includes: the base station sends the time domain approximate null subframe.
  • the pattern is to at least one micro base station in the coverage of the base station, so that the micro base station schedules the at least one user equipment served by the micro base station according to the time domain approximating the null subframe pattern.
  • the method in this embodiment may further include: the base station statistics the average bit rate of the user equipment receiving the signal from the base station, and sending the average bit rate of the user equipment to the radio resource management server, so that the radio resource management server is configured according to the user.
  • the average bit rate adjustment of the device uses a probability set of the node domain approximation null subframe pattern; wherein the superframe contains at least one radio frame.
  • the base station acquires the fading factor of the at least one user equipment served by the base station, and then sends the fading factor of the user equipment to the radio resource management server, where the fading factor is used to generate the node domain approximate null subframe pattern set. And receiving a node domain approximate null subframe pattern set from the radio resource management server and using a probability set of the node domain approximate null subframe pattern, and finally adopting a probability set corresponding to the node domain approximate null subframe pattern set and using the node domain approximate null subframe pattern
  • the preset policy allocates an approximate null subframe, and schedules at least one user equipment served by the base station according to the approximate null subframe.
  • the base station can adaptively configure the ABS according to the node domain approximation of the null subframe pattern, that is, the real-time change of the channel state, so that the interference can be effectively reduced. , improve system performance.
  • An embodiment of the present invention provides an approximate null subframe allocation.
  • the method includes: S301: A base station receives an RSRP of a user equipment reported by at least one user equipment.
  • RSRP is a parameter that can indicate the strength of a wireless signal in a Long Term Evolution (LTE) network, and carries a reference signal in a certain symbol. The average of the received signal power on all REs (resource particles).
  • the base station may be a macro base station; or, the base station may include a macro base station and a micro base station.
  • the base station calculates a fading factor of the at least one user equipment according to the RSRP.
  • the "fading factor” that is, the "large-scale fading factor”
  • Pt the transmit power of the base station (generally constant);
  • RSRP the measured value of the reference signal strength of the user;
  • PL the "fading factor” in this case, that is, large-scale fading.
  • the above formula does not consider small-scale fading, but only an approximate formula.
  • the step 301-302 may be replaced by: the base station receiving the fading factor of the user equipment reported by the at least one user equipment, where the fading factor is the user equipment according to the user The RSRP calculation of the device.
  • the base station does not need to perform calculation, and can directly receive the fading factor of the user equipment calculated by the user equipment according to the RSRP of the user equipment.
  • the base station sends a fading factor of the user equipment to the radio resource management server.
  • the RRC resource may generate a node domain approximate null subframe pattern set according to the fading factor, and the node domain approximate null subframe pattern set includes at least one node domain approximate null subframe pattern.
  • the method of the embodiment of the present invention further includes S304-S307:
  • the radio resource management server determines, according to a fading factor of the first user equipment, a base station that has a corresponding relationship with the first user equipment in the base station, where the corresponding relationship includes: a service relationship or an interference relationship, the first user equipment and the first user equipment.
  • the service base station has the service relationship.
  • the user equipment has a service relationship with the serving base station of the user equipment, and the user equipment has an interference relationship with the base station that is not the user equipment.
  • the first user equipment is any one of the user equipments served by the base station in the embodiment of the present invention.
  • the radio resource management server may be based on a fading factor of the user equipment. Determining a signal strength at which the user equipment receives signals from the respective base stations, and then having a base station connected to the user equipment according to the determined signal strength signal strength.
  • S304 may include: Steps S304a-S304b:
  • the radio resource management server determines, according to a fading factor of the first user equipment, a signal strength of the first user equipment to receive a signal from the at least one base station.
  • the fading factor of the user equipment is the attenuation degree of the signal when the user equipment receives the signal from the base station, so the RRC server can determine the signal strength of the signal received by the user equipment from each base station according to the fading factor of the user equipment.
  • the radio resource management server determines that the base station corresponding to the signal strength is a base station that has a corresponding relationship with the first user equipment.
  • a threshold range may be preset in the radio resource management server, and the base station corresponding to the first user equipment is determined according to the preset threshold.
  • the base station can provide service for the user equipment, the user equipment and the base station There is a correspondence between them).
  • the LTE network includes three base stations: a base station A, a base station B, and a base station C; four user equipments: a user equipment 1, a user equipment 2, a user equipment 3, and a user equipment 4; wherein, the coverage of the base station A
  • the range is area a
  • the coverage of base station B is area b
  • the coverage of base station C is area c.
  • the identifier of the base station A is A
  • the identifier of the base station B is B
  • the identifier of the base station C is C
  • the identifier of the user equipment 1 is 1
  • the identifier of the user equipment 2 is 2
  • the identifier of the user equipment 3 is 3.
  • the identifier of the user equipment 4 is 4, and the connection between the user equipment and the base station (including the solid line and the broken line) indicates that there is a correspondence relationship (service relationship or interference relationship) between the user equipment and the base station.
  • the radio resource management server acquires, according to the service relationship and the interference relationship, a user equipment that has uplink interference or downlink interference with the first user equipment.
  • the serving base station of the first user equipment schedules the first user equipment and the second user equipment by using the same network resource, between the first user equipment and the second user equipment There is uplink interference or downlink interference, and the second user equipment is a user equipment that has an interference relationship with the serving base station of the first user equipment.
  • the S305 may include: S305a-S305b:
  • the radio resource management server generates a physical topology map or a physical topology table according to the service relationship and the interference relationship.
  • the physical topology map or the physical topology table includes: an identifier of the user equipment, an identifier of the base station, and the first user equipment and the base station. Service relationship or interference relationship between.
  • the identifier of the first user equipment has a first correspondence with the identifier of the base station; when the base station has an interference relationship with the first user equipment, the identifier of the user equipment and the identifier of the base station There is a second correspondence.
  • the RRC server may indicate the first correspondence between the identifier of the first user equipment and the identifier of the base station by using a solid line connecting the identifier of the first user equipment and the identifier of the base station;
  • the identifier of the user equipment and the identifier of the base station represent a second correspondence between the identifier of the first user equipment and the identifier of the base station.
  • FIG. 5 is an example of a physical topology diagram.
  • the identifier of the base station A is A
  • the identifier of the base station B is B
  • the identifier of the base station C is C
  • the identifier of the user equipment 1 is 1
  • the identifier of the user equipment 2 is 2
  • the identifier of the user equipment 3 is 3, and the identifier of the user equipment 4 is 4.
  • the connection between the user equipment and the base station indicates that there is a correspondence between the user equipment and the base station. It can be seen from FIG.
  • the base station that has a corresponding relationship with the user equipment 1 is the base station A and the base station B (the base station A is the serving base station of the user equipment 1, and the base station A has a service relationship with the user equipment 1), and has a corresponding relationship with the user equipment 2.
  • the base station is the base station A, the base station B, and the base station C (the base station B is the serving base station of the user equipment 2, and the base station B has a service relationship with the user equipment 2), and the base station having the corresponding relationship with the user equipment 3 is the base station B and the base station C (the base station C).
  • the base station C and the user equipment 3 are served.
  • the base station having the corresponding relationship with the user equipment 4 is the base station C (the base station C is the serving base station of the user equipment 4, and the base station C has a service relationship with the user equipment 4). Therefore, the radio resource management server can be based on the user equipment and The correspondence between the base stations generates a physical topology map. If the user equipment and the base station are connected by a solid line, the base station is a serving base station of the user equipment, and the user equipment has a service relationship with the base station; It indicates that the base station is not the serving base station of the user equipment, but there is an interference relationship between the user equipment and the base station.
  • the radio resource management server may be represented by a method in which the identifier of the first user equipment and the identifier of the base station are connected by a dotted line; or, the identifier and the base station that are connected to the first user equipment are implemented.
  • the identifier is used to indicate the second correspondence between the identifier of the first user equipment and the identifier of the base station; or the RRC server may further identify the identifier of the first user equipment and the identifier of the base station by using different colors or gray levels.
  • the first correspondence and the second correspondence between the identifier of the first user equipment and the identifier of the base station are used.
  • the method for the first corresponding relationship between the identifier of the first user equipment and the identifier of the base station and the second corresponding relationship are not described herein again.
  • FIG. 7 is an example of a physical topology table.
  • the identifier of the base station A is A
  • the identifier of the base station B is B
  • the identifier of the base station C is C
  • the identifier of the user equipment 1 is 1
  • the identifier of the user equipment 2 is
  • the identifier is 2
  • the identifier of the user device 3 is 3
  • the identifier of the user device 4 is 4.
  • the black mark indicates that the user equipment has a service relationship with the base station base station
  • the grid mark indicates that the user equipment has an interference relationship with the base station base station.
  • the user equipment 2 and the base station A have an interference relationship, and the user equipment 2 and the base There is a service relationship between the station B, and there is an interference relationship between the user equipment 2 and the base station C. There is an interference relationship between the user equipment 3 and the base station B, and a service relationship exists between the user equipment 3 and the base station C. The user equipment 4 and the base station C There is a service relationship between them.
  • the RRC server may also use other marking methods to represent the correspondence between the user equipment and the base station in the physical topology table, for example, using a text mark or a different color mark, etc.
  • the specific form of the physical topology table is not limited.
  • the radio resource management server generates a user interference graph or a user interference table according to the physical topology map or the physical topology table, where the user interference graph or the user interference table includes the identifier of the first user equipment, and the first user equipment and the second user equipment. Uplink interference or downlink interference relationship between.
  • the third user equipment identifier has a third corresponding relationship with the identifier of the second user equipment.
  • the second user equipment is a user equipment that has an interference relationship with the serving base station of the first user equipment.
  • the base station A since the base station A is the serving base station of the user equipment 1, the base station A has an interference relationship with the user equipment 2, and therefore, when the base station A uses the same network resource to schedule the user equipment 1 When the user equipment 2 and the user equipment 2, there is uplink interference or downlink interference between the user equipment 1 and the user equipment 2; since the base station B is the serving base station of the user equipment 2, but the base station B has an interference relationship with the user equipment 3, therefore, when the base station B adopts When user equipment 2 and user equipment 3 are scheduled by the same network resource, there is uplink interference or downlink interference between user equipment 2 and user equipment 3.
  • the serving base station of the user equipment uses the same network resource to schedule the user equipment and other user equipments that have a service relationship with the serving base station of the user equipment, between the user equipment and the user equipment that has an interference relationship with the serving base station of the user equipment.
  • uplink interference or downlink interference for example, since base station C is user equipment 3 Serving the base station, but the base station C has a service relationship with the user equipment 4. Therefore, when the base station C uses the same network resource to schedule the user equipment 3 and the user equipment 4, there is uplink interference or downlink interference between the user equipment 3 and the user equipment 4. .
  • the radio resource management server can generate a user interference map as shown in FIG. 6 according to the uplink interference or downlink interference between the user equipments.
  • Figure 6 is an example of a user interference graph.
  • the representation of the user interference graph includes but is not limited to the representation of Figure 6.
  • FIG. 8 is an example of a user interference table.
  • the identifier of the user equipment 1 is 1, the identifier of the user equipment 2 is 2, the identifier of the user equipment 3 is 3, and the identifier of the user equipment 4 is 4.
  • the grid flag indicates that the user equipment and the base station base station have uplink or downlink interference.
  • the RRC server may also use other marking methods to indicate an uplink or downlink interference relationship between the user equipments in the user interference table, for example, using a text mark or a different color mark.
  • the specific form of the user interference table is not limited.
  • the RRC server obtains a node domain approximate null subframe pattern according to the service relationship, the interference relationship, and the uplink interference or downlink interference relationship between the first user equipment and the second user equipment.
  • S306 can include: S306a-S306c:
  • the radio resource management server acquires a third user equipment in the user interference graph or the user interference table, where the third user equipment is a user equipment that does not have uplink interference or downlink interference relationship with the first user equipment.
  • the third user equipment is a user equipment that does not have an interference relationship with the serving base station of the first user equipment, Exemplarily, as shown in FIG. 6, the RRC server can obtain the user interference graph. There is no uplink interference or downlink interference between the user equipment 1 and the user equipment 3. The user equipment 1 and the user equipment 4 do not exist. Uplink interference or downlink interference.
  • the radio resource management server searches for a serving base station of the third user equipment in the physical topology map or the physical topology table.
  • the RRC server can obtain the serving base station of the user equipment 1 as the base station A, the serving base station of the user equipment 3 as the base station C, and the serving base station of the user equipment 4 as the base station C.
  • the radio resource management server generates, according to the serving base station of the third user equipment, a node domain approximate null subframe pattern used by the base station.
  • the serving base station of the user equipment 1 (there is no uplink interference or downlink interference between the user equipment 1 and the user equipment 3) that is found by the RRC server and does not have uplink interference or downlink interference with other user equipments is the base station.
  • the serving base station of the user equipment 3 is the base station C.
  • the radio resource management server can determine that the three base stations are not the user equipment 1 And a serving base station of any one of the user equipments 3, and thus the radio resource management server may generate a node domain approximate null subframe pattern ⁇ 0 , 1 , 0 ⁇ , where "1" indicates that the node (base station) can be in a certain time slot.
  • An approximate null subframe is transmitted internally, and a "0" indicates that the node (base station) can transmit a normal subframe within a certain time slot.
  • the base station B can transmit an approximate null subframe in a certain time slot to reduce interference to the user equipment 1 and the user equipment 3.
  • the base station A can transmit a normal subframe in a certain time slot
  • the base station C can transmit a normal subframe in a certain time slot.
  • the radio resource management server generates a node domain approximate null subframe pattern set according to the generated node domain approximate null subframe pattern.
  • the node domain approximate null subframe pattern set includes at least one approximate null subframe pattern and at least one node identifier corresponding to the approximate null subframe pattern.
  • the node domain approximate null subframe pattern set may include at least one node.
  • the domain approximates the null subframe pattern.
  • the user equipment pair in FIG. 6 where there is no interference relationship may include: user equipment 1 and user equipment 3, user equipment 1 and user equipment 4. Therefore, the radio resource management server may also generate a node domain approximate null subframe pattern ⁇ 0, 1 , 0 ⁇ corresponding to the user equipment 1 and the user equipment 4, and the base station B may transmit an approximate null subframe in a certain time slot to reduce the user. Interference between device 1 and user equipment 4.
  • the base station A can transmit a normal subframe in a certain time slot
  • the base station C can transmit a normal subframe in a certain time slot.
  • the method in the embodiment of the present invention may further include S308-S309:
  • the radio resource management server receives an average bit rate of the at least one user equipment served by the base station of the base station, where the average bit rate of the user equipment is a time when the base station is in a superframe, and the statistical user equipment receives the average bit of the data sent by the base station. rate.
  • the superframe includes at least one radio frame.
  • the radio resource management server obtains a probability set of using the node domain approximate null subframe pattern according to the number of the node domain approximate null subframe pattern in the node domain approximate null subframe pattern set and the average bit rate of the user equipment.
  • the RRC server may obtain an average assigned probability set according to the number of the node domain approximate null subframe patterns in the node domain approximate null subframe pattern set; for example, if the node domain approximates the null subframe pattern set, the two node domains are included Approximate the null sub-frame pattern, then the probability sets corresponding to the null sub-frame patterns of the two node domains are respectively [0, 0.5] and [0.5, 1]; then, the radio resource management server can adjust the average allocation according to the average rate of the user equipment.
  • the probability set, and the adjusted probability set is obtained as a probability set that approximates the null subframe pattern using the node domain.
  • the radio resource management server may increase the probability set in the node area approximation null subframe pattern of the serving base station of the user equipment with a higher average rate; reduce the serving base station of the user equipment with the lower average rate to use the node domain approximation Overview of empty sub-frame patterns Rate set.
  • the node domain approximate null subframe pattern set contains two node domain approximate null subframe patterns, respectively, in ⁇ 0, 1 , 0 ⁇ and ⁇ 1 , 0, 0 ⁇
  • the initial values of the two probability sets using the node domain approximation null sub-frame pattern are respectively
  • the radio resource management server may correspondingly The probability set using the node domain approximation null sub-frame pattern is adjusted to:
  • the method and the adjustment granularity of the radio resource management server adjusting the probability set using the node domain approximating the null sub-frame pattern include, but are not limited to, the method and the adjustment granularity enumerated in the embodiments of the present invention.
  • the superframe includes at least one radio frame.
  • S308-S309 may be replaced by: the radio resource management server obtains an average assigned probability set according to the number of the node domain approximate null subframe patterns in the node domain approximation null subframe pattern set. That is, the probability set of the node domain approximate null subframe pattern sent by the RRC server to the base station for the first time may be the average allocated by the RRC server according to the node domain approximate null subframe pattern in the node domain approximate null subframe pattern set. The probability set can also be the adjusted probability set.
  • the radio resource management server sends a node domain approximate null subframe pattern set and a probability set using the node domain approximate null subframe pattern to the base station.
  • the probability set of the node domain approximate null subframe pattern sent by the RRC server to the base station for the first time is the average probability set of the average partition probability set [0, 1] and the node domain approximate null subframe pattern set.
  • the node domain approximates the segmentation probability set with the same number of null subframe patterns.
  • the radio resource management server in S308-S309 adjusts the probability set using the node domain approximate null subframe pattern according to the average rate of receiving the user equipment from the base station, so that the base station approximates the null subframe pattern set according to the node domain and uses the node domain approximation. Empty When the probability set of the sub-frame pattern is more accurately allocated to the approximate null sub-frame, the system performance can be further improved.
  • the base station generates a pseudo random sequence according to a time domain approximate null subframe pattern period in a working mode of the network where the base station is located, and generates a pseudo random number corresponding to the pseudo random sequence; the length of the pseudo random sequence and the time domain approximate null subframe The pattern period is the same.
  • the working mode can include FDD, or TDD. Since the time domain approximation of the null sub-frame pattern period in FDD mode and TDD mode is different, in general, the time domain approximate null sub-frame pattern length in FDD mode is 40, indicating a 40 ms pattern, with 40 The bit is represented by the bit; the length of the ABS pattern in TDD mode is 20, which represents a 20ms pattern, represented by 20 bits.
  • the base station allocates the approximate null subframe according to the node domain approximate null subframe pattern set and the node domain approximate null subframe pattern probability set.
  • the S3 12 may include S3 12a-S3 12c:
  • the base station compares the pseudo-random number with the probability set of the neighboring null sub-frame pattern using the node domain.
  • the pseudo random sequence includes at least one pseudo random number corresponding thereto.
  • the base station If the pseudo random number is included in the probability set, the base station generates a time domain approximate null subframe pattern according to the node domain approximate null subframe pattern corresponding to the probability set, and the time domain approximate null subframe pattern is used to indicate the pattern pattern of the approximate null subframe.
  • the base station may determine, in a segment probability set, a probability set of the pseudo random number corresponding to the pseudo random sequence generated by the base station, and then determine, according to the node domain approximate null subframe pattern corresponding to the probability set, the base station sends the approximate null subframe. Still send a normal sub-frame.
  • the base station may generate a time domain approximate null subframe pattern by using a periodic pseudo random number.
  • the pseudo random number in the FDD mode may be 8 bits in length, specifically, the time domain in the FDD mode.
  • the approximate null subframe pattern length is 40 bits, and a loop of 5 pseudo random numbers can be used to generate a corresponding time domain approximate null subframe pattern;
  • the length of the pseudo-random number in the TDD mode may be 10 bits.
  • the length of the time-domain approximated null subframe pattern in the TDD mode is 20 bits, and a loop of 2 pseudo-random numbers may be used to generate the corresponding time.
  • the domain approximates the null sub-frame pattern.
  • the node domain approximate null subframe pattern set contains two kinds of node domain approximate null subframe patterns: the node domain approximate null subframe pattern a ⁇ l 0 1 0 ⁇ and the node domain approximate null subframe pattern b ⁇ 0 00 ⁇ , the two node domains approximate nulls
  • the segmentation probabilities corresponding to the frame pattern are the segmentation probability a [0, 0.4) and the segmentation probability b [0.4, 1], respectively.
  • a ⁇ l 010 ⁇ is used to indicate that the base station A transmits the approximate null subframe in a certain time slot, the base station B transmits the normal subframe in a certain time slot, and the base station C transmits the approximate null subframe in a certain time slot, and the base station D is in the A normal subframe is transmitted in a certain time slot;
  • b ⁇ 0 1 00 ⁇ is used to indicate that the base station A transmits a normal subframe in a certain time slot, and the base station B transmits an approximate null subframe in a certain time slot, and the base station C is in a certain A normal subframe is transmitted in a time slot, and the base station D transmits a normal subframe in a certain time slot.
  • base station A generates 8 pseudo-random numbers, which are 0.2, 0.8, 0.7, 0.1, 0.5, 0.4, 0.3, 0.6; base station B generates 8 pseudo-random numbers, respectively 0.3. , 0.8, 0.1, 0.7, 0.6, 0.2, 0.3, 0.4. Therefore, the base station A and the base station B respectively can respectively belong to which segmentation probability according to the 10 pseudo-random numbers generated by themselves, and generate a corresponding time-domain approximate null subframe pattern.
  • the base station A may determine that 0.2 belongs to the segmentation probability a [0, 0.4), and determines that the node domain approximate null subframe pattern corresponding to the pseudo random number is a node domain approximate null subframe pattern a ⁇ l 010 ⁇ , that is, the base station A corresponds to
  • the pseudo-random number generation time domain approximate null subframe pattern value is "1";
  • 0.8 belongs to the segmentation probability b [0.4, 1]
  • the node domain approximate null subframe pattern corresponding to the pseudo random number is determined as the node domain approximate null subframe pattern b ⁇ 0100 ⁇ , that is, base station A generates a time domain approximation null subframe pattern corresponding to a pseudo random number value of "0";
  • 0.7 belongs to segmentation Probability b [0.4, 1], and determining that the node domain approximate null subframe pattern corresponding to the pseudo random number is a node domain approximate null subframe pattern b ⁇ £ 1 00 ⁇ , that is, the
  • the base station A generates corresponding time domain approximate null subframe pattern values corresponding to other pseudo random numbers.
  • the time domain approximate null sub-frame pattern generated by the base station A corresponding to the pseudo-random number 0.2, 0.8, 0.7, 0.1, 0.5, 0.4, 0.3, 0.6 is ⁇ 1, 0, 0, 1, 0, 1, 1, 0 ⁇
  • the time domain approximation null sub-frame pattern in the complete five cycles is ⁇ 1,0,0,1,0, 1,0,0,1,0,1,1,0, 1,0,0,1,0,1,1,0, 1,0,0,1,0,1,1,0, 1,0,0,1,0,1,1,0, 1,0,0,1,0,1,1,0, 1,0,0,1,0,1,0 ⁇ .
  • "1" indicates that the node (base station) can transmit an approximate null subframe within a certain time slot
  • "0" indicates that the node (base station) can transmit a normal subframe within a certain time slot.
  • the base station B may determine that 0.3 belongs to the segment 4 rate a [0, 0.4), and determines that the node domain approximate null subframe pattern corresponding to the pseudo random number is a node domain approximate null subframe pattern a ⁇ l 0 1 0 ⁇ , that is, The base station B generates a time domain approximate null subframe pattern corresponding to the pseudo random number, and has a value of "0"; 0.8 belongs to the segmentation probability b [0.4, 1], and determines that the node domain approximate null subframe pattern corresponding to the pseudo random number is a node domain approximation
  • the null sub-frame pattern b ⁇ 0 ⁇ 0 0 ⁇ , that is, the base station B corresponding to the pseudo-random number generation time domain approximation null sub-frame pattern value is "1"; 0.1 belongs to the segmentation probability a [0, 0.4), and the pseudo-random number is determined
  • the corresponding node domain approximate null subframe pattern is a node domain approximate nu
  • the base station B generates corresponding time domain approximate null subframe pattern values corresponding to other pseudo random numbers.
  • the time domain approximate null subframe pattern generated by the base station B corresponding to the pseudo random number 0.3, 0.8, 0.1, 0.7, 0.6, 0.2, 0.3, 0.4 is ⁇ 0, 1, 0, 1, 1, 0, 0, 1 ⁇
  • the complete time domain approximation null sub-frame pattern for five cycles is ⁇ 0,1,0,1,1,0,0,1, 0,1,0,1,1,0,0,1, 0,1,0,1,1,0,0,1, 0,1,0,0,1, 0,1,0,0,1, 0,1,0,1,0,0,1, 0,1,0,1,1,0,0,1 ⁇ .
  • the node domain approximate null subframe pattern set contains two kinds of node domain approximate null subframe patterns: the node domain approximate null subframe pattern a ⁇ l 0 0 0 ⁇ and the node domain near
  • the segmentation probabilities corresponding to the approximate null sub-frame patterns of the two node domains are the segmentation probability a [0, 0.3) and the segmentation probability b [0.3, 1], respectively.
  • a ⁇ 1 000 ⁇ is used to indicate that the base station A transmits the approximate null subframe in a certain time slot
  • the base station B transmits the approximate null subframe in a certain time slot
  • the base station C transmits the normal subframe in a certain time slot
  • the base station D is in the A normal subframe is transmitted in a certain time slot
  • b ⁇ 0 1 0 1 ⁇ is used to indicate that the base station A transmits a normal subframe in a certain time slot
  • the base station B transmits an approximate null subframe in a certain time slot
  • the base station C is certain
  • the normal subframe is transmitted in the time slot
  • the base station D transmits the approximate null subframe in a certain time slot.
  • base station A generates 10 pseudo-random numbers, respectively 0.2, 0.8, 0.7, 0.1, 0.5, 0.4, 0.3, 0.6, 0.9, 0.1; base station B generates 8 pseudo-random numbers. They are 0.3, 0.8, 0.1, 0.7, 0.6, 0.2, 0.3, 0.4, 0.6, 0.5, respectively.
  • Base station A and base station B respectively can respectively belong to which segmentation probability according to the 10 pseudo-random numbers generated by themselves and generate corresponding time-domain approximate null subframe patterns.
  • the base station A may determine that 0.2 belongs to the segmentation rate a [0, 0.3), and determines that the node domain approximate null subframe pattern corresponding to the pseudo random number is a node domain approximate null subframe pattern a ⁇ l 000 ⁇ , that is, the base station A Corresponding to the pseudo-random number generation time domain approximation null sub-frame pattern value is "1"; 0.8 belongs to the segmentation probability b [0.3, 1], and determines that the pseudo-random number corresponding node domain approximate null sub-frame pattern is the node domain approximation null sub-frame The pattern b ⁇ £ 1 0 1 ⁇ , that is, the base station A corresponding to the pseudo-random number generation time domain approximation null sub-frame pattern value is "0"; 0.7 belongs to the segmentation probability b [0.3, 1], and determines the pseudo-random number corresponding to The node domain approximate null subframe pattern is the node domain approximate null subframe pattern b ⁇ £
  • the base station A generates corresponding time domain approximate null subframe pattern values corresponding to other pseudo random numbers.
  • the time domain approximate null subframe pattern generated by the base station A corresponding to the pseudo-random number 0.2, 0.8, 0.7, 0.1, 0.5, 0.4, 0.3, 0.6, 0.9, 0.1 is ⁇ 1, 0, 0, 1, 0, 0 ,0,0,0,1 ⁇ , full, time in two cycles
  • the domain approximate null subframe pattern is ⁇ 1,0,0,1,0,0,0,0,0,1, 1,0,0,1,0,0,0,0,0,1 ⁇ .
  • "1" indicates that the node (base station) can transmit an approximate null subframe within a certain time slot
  • "0" indicates that the node (base station) can transmit a normal subframe within a certain time slot.
  • the base station B may determine that 0.3 belongs to the segment 4 rate b [0.3, 1], and determines that the node domain approximate null subframe pattern corresponding to the pseudo random number is a node domain approximate null subframe pattern b ⁇ 0 1 0 1 ⁇ , that is, The base station B generates a time domain approximate null subframe pattern corresponding to the pseudo random number, and has a value of "1"; 0.8 belongs to the segmentation probability b [0.3, 1], and determines that the node domain approximate null subframe pattern corresponding to the pseudo random number is a node domain approximation
  • the null sub-frame pattern b ⁇ 0 ⁇ 0 1 ⁇ , that is, the base station B corresponding to the pseudo-random number generation time domain approximation null sub-frame pattern value is "1";
  • 0.1 belongs to the segmentation probability a [0, 0.3), and the pseudo-random number is determined
  • the corresponding node domain approximate null subframe pattern is the node domain approximate null
  • the base station B generates corresponding time domain approximate null subframe pattern values corresponding to other pseudo random numbers.
  • the time domain approximate null sub-frame pattern generated by the base station B corresponding to the pseudo-random number 0.3, 0.8, 0.1, 0.7, 0.6, 0.2, 0.3, 0.4, 0.6, 0.5 is ⁇ 1,1,0,1,1,0 ,1,1,1 ⁇
  • the complete time domain approximation of the null sub-frame pattern in two periods is ⁇ 0,1,0,1,1,0,0,1, 1,1,0,1, 1,0,1,1,1,1 , 1,1,0,1,1,1,1,1 ⁇ .
  • "1" indicates that the node (base station) can transmit an approximate null subframe within a certain time slot
  • "0" indicates that the node (base station) can transmit a normal subframe within a certain time slot.
  • the base station allocates an approximate null subframe according to the time domain approximate null subframe pattern, and schedules at least one of the user equipments served by the base station according to the allocated approximate null subframe.
  • the method of the embodiment of the present invention further includes: the macro base station sends a time domain approximation The null subframe is mapped to the micro base station in the coverage of the macro base station, so that the micro base station approximates the null subframe pattern according to the time domain, and schedules the user equipment under the coverage of the micro base station.
  • the base station schedules user settings in the coverage of the base station according to the approximate null subframe.
  • the device includes: the base station according to the channel quality indicator of the approximate null subframe and the user equipment
  • CQI Channel Quanlity Indicator
  • the base station acquires the fading factor of the at least one user equipment served by the base station, and then sends the fading factor of the user equipment to the radio resource management server, where the fading factor is used to generate the node domain approximate null subframe pattern set. Then, the node domain approximate null subframe pattern set from the RRC server and the probability set using the node domain approximate null subframe pattern are received, and finally the probability set corresponding to the node domain approximate null subframe pattern set and the node domain approximate null subframe pattern is used.
  • the policy allocates an approximate null subframe, and schedules at least one user equipment served by the base station according to the approximate null subframe.
  • the base station can adaptively configure the ABS according to the real-time change of the channel state, so that the interference can be effectively reduced and the system performance can be improved.
  • the embodiment of the present invention provides a radio resource management server.
  • the radio resource management server includes: a receiving unit 41, a generating unit 42, and a sending unit 43.
  • the receiving unit 41 is configured to receive, by the base station, a fading factor of the at least one first user equipment served by the base station, where the fading factor is used to indicate that the first user equipment receives the signal from the base station The degree of attenuation.
  • the generating unit 42 is configured to generate, according to the fading factor received by the receiving unit 41, a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern.
  • the sending unit 43 is configured to send the node domain approximate null subframe pattern set generated by the generating unit 42 and a probability set using the node domain approximate null subframe pattern to the base station, so that the base station according to the node A domain approximate null subframe pattern and the probability set using the node domain approximate null subframe pattern are assigned approximate null subframes.
  • the first cell includes a macro cell
  • the base station includes the macro base At least one of a station and a base station.
  • the generating unit 42 includes: a determining subunit 421, a first obtaining subunit, a second acquiring subunit, and a generating subunit.
  • a determining subunit 421 configured to determine, according to a fading factor of the first user equipment received by the receiving unit 41, a base station that has a corresponding relationship with the first user equipment in the base station; where the correspondence includes The service relationship or the interference relationship, the first user equipment and the serving base station of the first user equipment have the service relationship, and the second user equipment and the serving base station of the first user equipment have the interference relationship.
  • a first obtaining sub-unit 422 configured to acquire, according to the service relationship and the interference relationship determined by the determining sub-unit 421, a user equipment that has uplink interference or downlink interference with the first user equipment, where When the serving base station of the first user equipment schedules the first user equipment and the second user equipment by using the same network resource, there is uplink interference or downlink interference between the first user equipment and the second user equipment.
  • a second obtaining subunit 423 configured to determine, according to the determining the sub-unit 421, the service relationship, the interference relationship, and the first user equipment and the second acquired by the first obtaining subunit 422 An uplink interference or downlink interference relationship between the user equipments is obtained, and the approximate null subframe pattern of the node domain is obtained.
  • the generating subunit 424 is configured to generate the node domain approximate null subframe pattern set according to the node domain approximate null subframe pattern that the second obtaining subunit 423 has acquired.
  • the determining subunit 421 includes: a first determining module 421a and a second determining module 421b.
  • the first determining module 421 a is configured to determine, according to the fading factor of the first user equipment received by the receiving unit 41, a signal strength of the first user equipment to receive a signal from at least one of the base stations.
  • a second determining module 421b configured to: if the first determining module 421a determines If the signal strength is greater than or equal to the set threshold, the base station corresponding to the signal strength is determined to be the base station that has a corresponding relationship with the first user equipment.
  • the corresponding relationship includes: the service relationship or the interference relationship.
  • the first obtaining subunit 422 may include: a first generating module 422a and a second generating module 422b.
  • the first generation module 422a is configured to generate a physical topology map or a physical topology table according to the service relationship and the interference relationship determined by the determining sub-unit 421, where the physical topology map or the physical topology table includes: An identifier of the user equipment, an identifier of the base station, and the service relationship or the interference relationship between the first user equipment and the base station; wherein, when the base station and the first user equipment When the service relationship exists, the identifier of the first user equipment has a first corresponding relationship with the identifier of the base station; when the interference relationship exists between the base station and the first user equipment, the user equipment The identifier has a second correspondence with the identifier of the base station.
  • a second generation module 422b configured to generate a user interference map or a user interference table according to the physical topology map or the physical topology table generated by the first generation module 422a, where the user interference map or the user interference table includes the An identifier of the first user equipment, and an uplink interference or downlink interference relationship between the first user equipment and the second user equipment, where the identifier of the first user equipment and the identifier of the second user equipment There is a third correspondence.
  • the second obtaining subunit 423 includes: an obtaining module 423a, a searching module 423b, and a third generating module 423c.
  • the obtaining module 423 a is configured to acquire the user interference map generated by the first obtaining sub-unit 422 or the third user equipment in the user interference table, where the third user equipment is the first user equipment There is no user equipment of the uplink interference or downlink interference relationship.
  • the searching module 423b is configured to search, in the physical topology map or the physical topology table generated by the first obtaining subunit 422, the location acquired by the acquiring module 423a The serving base station of the third user equipment.
  • the third generation module 423c is configured to generate, according to the serving base station of the third user equipment that is found by the searching module 423b, the node domain approximate null subframe pattern used by the base station.
  • the radio resource management server provided by the embodiment of the present invention may further include: an obtaining unit 44.
  • the acquiring unit 44 is configured to send, by the sending unit 43, the probability that the node domain approximates an empty subframe pattern set and uses the node domain to approximate a null subframe pattern. Before concentrating to the base station, determining, according to the number of the neighboring null subframe patterns of the node domain in the node domain approximate null subframe pattern set generated by the generating unit, determining an average of using at least one of the node domains to approximate an empty subframe pattern Probability set.
  • the average probability set is obtained by equalizing the number of approximate null subframe patterns of the node domain in the node domain approximate null subframe pattern set according to the node number average space division probability complete set of the node domain approximate null subframe pattern. Segment probability set.
  • the receiving unit 41 is further configured to send, in the sending unit 43, the node domain approximate null subframe pattern set and use the node domain approximation
  • the probability of the null subframe pattern is before the base station, and receives an average bit rate of at least one of the first user equipments served by the base station from the base station, where an average bit rate of the first user equipment is
  • the first user equipment receives the average bit rate of the data sent by the base station in a superframe time, where the super frame includes at least one radio frame.
  • the acquiring unit 44 is further configured to: according to the node domain approximate empty subframe pattern set generated by the generating unit 42, the number of the node domain approximate null subframe pattern and the receiving unit Receiving the average bit rate of the first user equipment to obtain the approximate null subframe pattern probability set using the node domain.
  • the RRC server provided by the embodiment of the present invention receives a fading factor of at least one user equipment served by a base station from a base station, and then generates a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern according to the fading factor, and then Transmitting a node domain approximate null subframe pattern set and using the node domain approximate null subframe pattern probability set to the base station, so that the base station allocates an approximate null subframe according to the node domain approximate null subframe pattern and the probability set using the node domain approximate null subframe pattern.
  • the base station can adaptively configure the AB S according to the node domain approximate empty subframe pattern, that is, the real-time change of the channel state, so that the base station can be efficiently configured. Reduce interference and improve system performance.
  • the embodiment of the present invention provides a base station, as shown in FIG. 10, including: an obtaining unit 5 1 , a sending unit 52, a receiving unit 53, and an allocating unit 54.
  • the obtaining unit 5 1 is configured to obtain a fading factor of the at least one user equipment served by the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the user equipment receives a signal from the base station.
  • a sending unit 52 configured to send a fading factor of the user equipment acquired by the acquiring unit 51 to a radio resource management server, where the fading factor is used to generate a node domain approximate null subframe that includes at least one node domain approximate null subframe pattern And the set of approximated null subframe patterns of the node domain includes at least one approximate null subframe pattern and a node identifier corresponding to the at least one approximate null subframe pattern.
  • the receiving unit 53 is configured to receive the node domain approximate null subframe pattern set from the radio resource management server and a probability set using a node domain approximate null subframe pattern, where the node domain approximates an empty subframe pattern set and uses a node domain approximation
  • the probability set of the null subframe pattern is generated by the radio resource management server according to the fading factor of the user equipment transmitted from the transmitting unit 52.
  • the allocating unit 54 is configured to allocate an approximate null subframe according to the node domain approximate null subframe pattern set received by the receiving unit 53 and the probability set corresponding to the node domain approximate null subframe pattern, and according to a preset policy, The approximate null subframe schedules at least one of the user equipments served by the base station.
  • the base station includes at least one of the macro base station and the micro base station.
  • the acquiring unit 51 includes: a receiving subunit 511 and a calculating subunit 512.
  • the receiving subunit 511 is configured to receive the reference signal receiving power RSRP of the user equipment reported by the at least one user equipment.
  • the calculating subunit 512 is configured to calculate a fading factor of the at least one user equipment according to the RSRP received by the receiving subunit 511.
  • the acquiring unit 51 is further configured to receive, by the at least one user, a fading factor of the user equipment reported by the user equipment, where the fading factor is the user
  • the device is calculated according to the RSRP of the user equipment.
  • the base station may further include: a generating unit 56.
  • a generating unit 56 configured to: before the allocation unit 54 allocates an approximate null subframe according to the probability that the node domain approximate null subframe pattern set and the node domain approximate null subframe pattern are used, according to the preset policy, a time domain approximate null subframe pattern period in a working mode of the network where the base station is located generates a pseudo random sequence, and generates a pseudo random number corresponding to the pseudo random sequence; a length of the pseudo random sequence and the time domain approximate null subframe pattern The cycle is the same.
  • the allocating unit 54 includes: a comparing subunit 541, a generating subunit 542, and an assigning subunit 543.
  • a comparison subunit 541 configured to compare the pseudo random number generated by the generating unit 56 with the approximate null subframe pattern used by the receiving unit by using the node domain
  • a generating sub-unit 542 configured to generate a time-domain approximate null subframe pattern according to the node-domain approximate null subframe pattern corresponding to the probability set, if the comparison sub-unit 541 compares and obtains the pseudo-random number to be included in the probability set,
  • the time domain approximation null subframe pattern is used to indicate a mode Pattern of the approximate null subframe.
  • the allocation subunit 543 is configured to allocate the approximate null subframe according to the time domain approximate null subframe pattern generated by the generating subunit 542, and schedule at least one of the base station services according to the allocated approximate null subframe. User equipment.
  • the sending unit 52 is further configured to: after the base station is a macro base station, after the allocating unit 54 generates a time domain approximate null subframe pattern according to the node domain approximate null subframe pattern corresponding to the segmentation probability, Transmitting the time domain approximate null subframe pattern to at least one micro base station in the coverage of the base station, so that the micro base station schedules at least one user of the micro base station service according to the time domain approximate null subframe pattern device.
  • the allocation sub-unit 544 is further configured to schedule at least one user equipment served by the base station according to the allocated approximate null subframe and the channel quality indication CQI reported by the user equipment.
  • the base station further includes: a statistics unit 55.
  • the statistic unit 55 is configured to count an average bit rate of the user equipment receiving the signal from the base station.
  • the sending unit 52 is further configured to send an average bit rate of the user equipment that is counted by the statistics unit 55 to the radio resource management server, so that the radio resource management server is configured according to an average bit rate of the user equipment. Adjusting the probability set using the node domain approximate null subframe pattern.
  • the superframe includes at least one radio frame.
  • the base station provided by the embodiment of the present invention acquires a fading factor of at least one user equipment served by the base station, and then sends a fading factor of the user equipment to the radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern set, and then receives the wireless
  • the node domain approximates the null subframe pattern set of the resource management server and the probability set using the node domain approximate null subframe pattern, and finally uses the preset strategy allocation approximation according to the node domain approximate null subframe pattern set and the probability set corresponding to the node domain approximate null subframe pattern.
  • the base station can adaptively configure the AB S according to the node domain approximate empty subframe pattern, that is, the real-time change of the channel state, so that the base station can be efficiently configured. Reduce interference and improve system performance.
  • the embodiment of the present invention provides a radio resource management server, as shown in FIG. 1, including: a receiver 61, a processor 62, and a transmitter 63.
  • a receiver 61 configured to receive, by the base station, a fading factor of the at least one first user equipment served by the base station, where the fading factor is used to indicate that the first user equipment receives the signal from the base station The degree of attenuation.
  • the processor 62 is configured to generate, according to the fading factor received by the receiver 61, a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern, where the node domain approximate null subframe pattern set includes at least one approximation An empty subframe pattern and a node identifier corresponding to the at least one approximate null subframe pattern.
  • the transmitter 63 is configured to send the node domain approximate null subframe pattern set generated by the processor 62 and the probability set using the node domain approximate null subframe pattern to the base station, so that the base station according to the node A domain approximate null subframe pattern and the probability set using the node domain approximate null subframe pattern are assigned approximate null subframes.
  • the base station includes at least one of the macro base station and the micro base station.
  • the processor 62 is further configured to determine, in the base station, the first user equipment according to a fading factor of the first user equipment received by the receiver 61.
  • a base station having a corresponding relationship wherein the corresponding relationship includes: a service relationship or an interference relationship, where the first user equipment and the serving base station of the first user equipment have the service relationship, and the second user equipment and the The user equipment of the user equipment has the interference relationship, and the user equipment that has uplink interference or downlink interference with the first user equipment is obtained according to the service relationship and the interference relationship, where, when the first user equipment is When the serving base station schedules the first user equipment and the second user equipment by using the same network resource, the first user equipment and the second user equipment have uplink interference or downlink interference; according to the service relationship And the interference relationship, and the uplink interference or downlink interference relationship between the first user equipment and the second user equipment, acquiring the approximate null subframe pattern of the node domain; and approximating the null according to the acquired node domain
  • the frame pattern generates the
  • the processor 62 is further configured to determine, according to a fading factor of the first user equipment received by the receiver 61, a signal strength of the first user equipment to receive a signal from at least one of the base stations; If the signal strength is greater than or equal to the set threshold, the base station corresponding to the signal strength is determined to be the base station that has a corresponding relationship with the first user equipment.
  • the corresponding relationship includes: the service relationship or the interference relationship.
  • the processor 62 is further configured to generate a physical topology map or a physical topology table according to the service relationship and the interference relationship, where the physical topology map or the physical topology table includes: the user equipment And the identifier of the base station, and the service relationship or the interference relationship between the first user equipment and the base station; wherein, when the base station and the first user equipment have the service In the case of a relationship, the identifier of the first user equipment and the identifier of the base station have a first corresponding relationship; when the base station and the first user equipment have the interference relationship, the identifier of the user equipment is The identifier of the base station has a second correspondence relationship, and the user interference map or the user interference table is generated according to the physical topology map or the physical topology table, where the user interference graph or the user interference table includes the identifier of the first user equipment, and The first user equipment and An uplink interference or downlink interference relationship between the second user equipment, where the identifier of
  • the processor 62 is further configured to acquire the user interference map or the third user equipment in the user interference table, where the third user equipment does not have the uplink with the first user equipment. a user equipment that interferes with a downlink interference relationship; in the physical topology map or the physical topology table, searching for a serving base station of the third user equipment; generating, according to the serving base station of the third user equipment The node domain used by the base station approximates a null subframe pattern.
  • the processor 62 is further configured to send, in the transmitter 63, the node domain approximate null subframe pattern set and use the node domain approximate null Before the probability set of the frame pattern is sent to the base station, determining an average probability set of using at least one of the node domain approximate null subframe patterns according to the number of the node domain approximate null subframe patterns in the node domain approximate null subframe pattern set .
  • the average probability set is obtained by equalizing the number of approximate null subframe patterns of the node domain in the node domain approximate null subframe pattern set according to the node number average space division probability complete set of the node domain approximate null subframe pattern. Segment probability set.
  • the receiver 61 is further configured to send, in the transmitter 63, the node domain approximate null subframe pattern set and use the node domain approximation Receiving a probability set of the null subframe pattern to the base station, receiving an average bit rate of at least one of the first user equipments served by the base station from the base station, where an average bit rate of the first user equipment is the base station Receiving, by the first user equipment, the average bit rate of the data sent by the base station, where the superframe includes at least one radio frame.
  • the processor 62 is further configured to: according to the node domain, approximate the number of the null domain subframe patterns of the node domain in the null subframe design set, and the first received by the receiver 61.
  • the average bit rate of the user equipment acquires the approximate null subframe pattern probability set using the node domain.
  • the RRC server provided by the embodiment of the present invention receives a fading factor of at least one user equipment served by a base station from a base station, and then generates a node domain approximate null subframe pattern set including at least one node domain approximate null subframe pattern according to the fading factor, and then Transmitting a node domain approximate null subframe pattern set and using the node domain approximate null subframe pattern probability set to the base station, so that the base station allocates an approximate null subframe according to the node domain approximate null subframe pattern and the probability set using the node domain approximate null subframe pattern.
  • the base station can adaptively configure the AB S according to the node domain approximate empty subframe pattern, that is, the real-time change of the channel state, so that the base station can be efficiently configured. Reduce interference and improve system performance.
  • An embodiment of the present invention provides a base station, as shown in FIG. 12, including: a processor 71, a transmitter 72, and a receiver 73.
  • the processor 71 is configured to acquire a fading factor of the at least one user equipment served by the base station, where the fading factor is used to indicate a degree of attenuation of the signal when the user equipment receives a signal from the base station.
  • a transmitter 72 configured to send a fading factor of the user equipment acquired by the processor 71 to a radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern including at least one node domain approximate null subframe pattern
  • the set, the node domain approximate null subframe pattern set includes at least one approximate null subframe pattern and a node identifier corresponding to the at least one approximate null subframe pattern.
  • a receiver 73 configured to receive, from the radio resource management server, the node domain approximate null subframe pattern set and a probability set using a node domain approximate null subframe pattern, where the node domain approximates an empty subframe pattern set and uses a node domain approximation
  • the probability set of the null subframe pattern is the radio resource management server according to the user received from the sender 72
  • the device's fading factor is generated.
  • the processor 7 1 is further configured to allocate an approximate space by using a preset strategy according to the node domain approximate null subframe pattern set received by the receiver 73 and the probability set corresponding to the node domain approximate null subframe pattern. And scheduling, according to the approximate null subframe, at least one of the user equipments served by the base station.
  • the base station includes at least one of the macro base station and the micro base station.
  • the receiver 73 is further configured to receive, by the at least one reference signal received power RSRP of the user equipment reported by the user equipment.
  • the processor 7 1 is further configured to calculate, according to the RSRP received by the receiver 73, a fading factor of at least one of the user equipments.
  • the receiver 73 is further configured to receive, by the at least one user, a fading factor of the user equipment reported by the user equipment, where the fading factor is the user
  • the device calculates the RSRP according to the user equipment.
  • the processor 71 is further configured to: before performing the approximate null subframe according to the node domain approximate null subframe pattern set and the probability corresponding to the using the node domain approximate null subframe pattern, according to the preset policy, a time domain approximated null subframe pattern period in a working mode of the network where the base station is located generates a pseudo random sequence, and generates a pseudo random number corresponding to the pseudo random sequence; the length of the pseudo random sequence and the time domain approximate null The frame pattern period is the same.
  • the processor 71 is further configured to compare the pseudo random number with the probability set that uses the node domain to approximate a null subframe pattern; if the pseudo random number is included in the probability set, according to the a time domain approximate null subframe pattern generated by the node domain approximate null subframe pattern corresponding to the probability set, wherein the time domain approximate null subframe pattern is used to indicate a pattern Pattern of the approximate null subframe; and the space subframe approximate null subframe pattern allocation station is used according to the time domain Deriving an empty subframe, and scheduling the base station service according to the allocated approximate null subframe One less of the user equipment.
  • the transmitter 72 is further configured to: after the base station is a macro base station, send, after the processor 71 generates a time domain approximate null subframe pattern according to the node domain approximate null subframe pattern corresponding to the probability set, send And the time domain approximating the null subframe pattern to the at least one micro base station in the coverage of the base station, so that the micro base station schedules the at least one user equipment served by the micro base station according to the time domain approximate null subframe pattern. .
  • the processor 71 is further configured to schedule at least one of the user equipments served by the base station according to the allocated approximate null subframe and the channel quality indication CQI reported by the user equipment.
  • the processor 71 is further configured to calculate an average bit rate of the user equipment to receive a signal from the base station.
  • the transmitter 72 is further configured to send an average bit rate of the user equipment that is calculated by the processor 71 to the radio resource management server, so that the radio resource management server is configured according to an average bit rate of the user equipment. Adjusting the probability set using the node domain approximate null subframe pattern.
  • the superframe includes at least one radio frame.
  • the base station acquires a fading factor of at least one user equipment served by the base station, and then sends a fading factor of the user equipment to the radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern set, and then receives the wireless
  • the node domain approximates the null subframe pattern set of the resource management server and the probability set using the node domain approximate null subframe pattern, and finally uses the preset strategy allocation approximation according to the node domain approximate null subframe pattern set and the probability set corresponding to the node domain approximate null subframe pattern.
  • the adaptive configuration of the ABS is compared with the base station.
  • the AB S can be adaptively configured according to the node domain approximation of the null sub-frame pattern, that is, the real-time change of the channel state, thereby effectively reducing interference and improving system performance.
  • An embodiment of the present invention provides an approximate null subframe allocation system. As shown in FIG. 13, the method includes: a radio resource management server 81, a base station 82, and a user equipment 83.
  • the RRC server 81 is configured to receive a fading factor of at least one user equipment 83 served by the base station 82 of the base station 82, where the fading factor is used to indicate that the user equipment 83 receives a signal from the base station 82.
  • a degree of attenuation of the signal generating a node-domain approximate null subframe pattern set including at least one node-domain approximate null subframe pattern according to the fading factor; transmitting the node-domain approximate null subframe pattern set and using the node domain approximate null
  • the probability of the frame pattern is set to the base station 82 such that the base station 82 allocates an approximate null subframe based on the node domain approximate null subframe pattern and the probability set using the node domain approximate null subframe pattern.
  • the base station 82 is configured to acquire a fading factor of the at least one user equipment 83 served by the base station 82, where the fading factor is used to indicate the attenuation degree of the signal when the user equipment 83 receives the signal from the base station 82.
  • the probability set corresponding to the null-subframe pattern of the node domain is allocated with an approximate null subframe by using a preset policy, and at least one of the user equipments 83 served by the base station 82 is scheduled according to the approximate null subframe.
  • the user equipment 83 is configured to report the RSRP of the user equipment 83 to the base station 82, so that the base station 82 calculates a fading factor of the user equipment 83 according to the RSRP; or reports the base station 82 to the base station 82.
  • the fading factor of the user equipment 83 The fading factor is calculated by the user equipment 83 according to the RSRP of the user equipment 83.
  • the approximate null subframe allocation system may include at least two base stations and at least two user equipments, that is, the approximate null subframe allocation system may include at least one macro base station and one micro base station.
  • the approximate null subframe allocation system acquires a fading factor of at least one user equipment served by the base station, and then sends a fading factor of the user equipment to the radio resource management server, where the fading factor is used to generate a node domain approximate null subframe pattern set. Then, the node domain approximate null subframe pattern set from the RRC server and the probability set using the node domain approximate null subframe pattern are received, and finally the probability set corresponding to the node domain approximate null subframe pattern set and the node domain approximate null subframe pattern is used.
  • the policy allocates an approximate null subframe, and schedules at least one user equipment served by the base station according to the approximate null subframe.
  • the base station can adaptively configure the AB S according to the node domain approximate empty subframe pattern, that is, the real-time change of the channel state, so that the base station can be efficiently configured. Reduce interference and improve system performance.
  • the disclosed system The apparatus and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another 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 units described as separate components may or may not be physically separated, and the components displayed as the units may or may not be physical units, and 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 objectives of the embodiment of the present 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 in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods of the 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. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé, un appareil et un système d'attribution de sous-trame presque vide (ABS). La présente invention concerne le domaine des communications, et peut configurer d'une manière adaptative une ABS en fonction d'un changement en temps réel d'un état de canal, et peut en conséquence très efficacement réduire le brouillage et améliorer les performances du système. Une solution spécifique est la suivante : une station de base obtient un facteur d'atténuation d'au moins un équipement utilisateur desservi par la station de base; envoie le facteur d'atténuation de l'équipement utilisateur à un serveur de gestion de ressources sans fil, le facteur d'atténuation étant utilisé pour générer un ensemble de motifs ABS de domaine de nœud comprenant au moins un motif ABS de domaine de nœud; reçoit un ensemble de motifs ABS de domaine de nœud et un ensemble de probabilités d'utilisation d'un motif ABS de domaine de nœud en provenance du serveur de gestion de ressources sans fil; et attribue une ABS en fonction de l'ensemble de motifs ABS de domaine de nœud et de l'ensemble de probabilités d'utilisation d'un motif ABS de domaine de nœud par utilisation d'une politique préétablie, et planifie, conformément à l'ABS, l'au moins un équipement utilisateur desservi par la station de base. La présente invention est appliquée dans un processus de planification d'un équipement utilisateur par une station de base.
PCT/CN2013/073090 2013-03-22 2013-03-22 Procédé, appareil et système d'attribution de sous-trame presque vide WO2014146305A1 (fr)

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PCT/CN2013/073090 WO2014146305A1 (fr) 2013-03-22 2013-03-22 Procédé, appareil et système d'attribution de sous-trame presque vide

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WO2012108640A2 (fr) * 2011-02-09 2012-08-16 Lg Electronics Inc. Procédé de signalisation de motif de sous-trame afin d'empêcher l'apparition d'interférences intercellulaires dans un système de réseau hétérogène et appareil s'y rapportant
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