CN101494898A - Method for coordinating interference between districts - Google Patents
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Abstract
The invention relates to an inter-cell interference coordination method, The method comprises: determining the limited interference source of the cell; dividing the areas of the limited interference source; setting a link loss compensation factor in every area; performing time frequency resources reservation and service quality priority setting, to guarantee, when scheduling time frequency resource, as possible that the time frequency resource of the user terminal with high service quality priority is completely orthogonal, while the time frequency resource of the user terminal with low service quality priority is quasi-orthogonal; thereby, increasing the time frequency resource flexibility in high level scheduling. The invention effectively solves the problems of excessive system cost, excessive reciprocating time delay, heavy load and difficulty in guaranteeing the orthogonal of time frequency resource occupied by the interference source in full load during the inter-cell interference coordination; guarantees service quality; further refines cell covering area; and increasing emission power while reducing interference.
Description
Technical field
The present invention relates to cordless communication network, relate in particular to a kind of inter-cell interference coordination method.
Background technology
In follow-on broadband wireless communication network, solving in the cordless communication network presence of intercell interference becomes a key factor that improves inter-cell user terminal throughput and user terminal average throughput and is faced with formidable challenges.
At present, in IEEE 802.16j, IMT-Advanced, WINNER (Wireless World InitiativeNew Radio), all propose to adopt methods such as interference randomization, interference coordination, interference eliminated to solve the problem of presence of intercell interference.Long-term technology evolution (the Long Term Evolution of third generation partner program, LTE) user terminal of giving chapter and verse in is divided into internal layer and skin to the strong jamming level of all neighbor cells with cell coverage area, and adopts the method for control of part power and path loss compensation to solve presence of intercell interference.Wherein, internal layer is the zone that does not have presence of intercell interference, uses the total power compensation; And outer zone for having presence of intercell interference, the method that adopts control of part power and path loss to compensate solves the problem of presence of intercell interference.
Adopt the control of part power and the path loss compensation method of layering, light or when being the span load when the load in the cordless communication network, can guarantee the employed running time-frequency resource of each neighbor cell, be that Physical Resource Block (PRB) keeps quadrature, but, when load is heavier, then be difficult to guarantee that by scheduling employed running time-frequency resource keeps quadrature between all neighbor cells, though can distinguish the complete quadrature of collision probability the best part in the running time-frequency resource that uses in the neighbor cell by the sensitizing range is set, yet reduced the flexibility of scheduling and when control of part power and path loss compensation, the availability of frequency spectrum has been descended, caused the throughput of Cell Edge User terminal and the decline of user terminal average throughput.
Summary of the invention
Technical problem to be solved by this invention is, a kind of method of Inter-Cell Interference Coordination is provided, and this method not only can guarantee the employed running time-frequency resource quadrature of each neighbor cell, and guaranteed the flexibility of scheduling.
Overhead when effectively solving Inter-Cell Interference Coordination is excessive, round-trip delay is long and load is heavier or full load is difficult to guarantee that the shared running time-frequency resource of interference source is difficult to problems such as quadrature,
A kind of inter-cell interference coordination method may further comprise the steps:
Step 1: base station selected limited interference source;
Step 2: threshold value is divided in the setting area, base station, according to threshold value described limited interference source affiliated subdistrict is divided into noiseless zone, limited interference region and transitional region;
Step 3: the time-frequency resource allocating mode of resource reservation part is determined in the base station;
Step 4: service quality (Quality of Service, the QoS) priority number of user terminal determined in the base station;
Step 5: road loss compensation factor and the running time-frequency resource that each is regional determined in the base station;
Step 6: the user terminal region is determined according to the interference signal intensity of user terminal to send up in the base station, and judge the loading condition that this is regional, if severe load or fully loaded, then the QoS priority at user terminal place and the resource reservation of use are at first determined in the base station, determine the road loss compensation factor of user terminal then, the transmitting power of user terminal is adjusted; Otherwise the road loss compensation factor of user terminal is directly determined in the base station, and the transmitting power of user terminal is adjusted.
Described step 1 specifically may further comprise the steps:
Steps A: the base station is provided with limited interference source and selects threshold value;
Step B: the signal strength signal intensity of all interference base stations in the base station measurement adjacent cell list;
Step C: the base station selected definite limited interference source of all interference base stations conducts of selecting threshold value greater than limited interference source.
The described threshold value of step 2 comprises: be used to divide the threshold value one of noiseless zone and transitional region and the threshold value two that is used to divide transitional region and limited interference region, described threshold value one is less than described threshold value two, and described noiseless zone is meant the zone of high reject signal intensity less than territory threshold value one; Described limited interference region is meant the zone of high reject signal intensity greater than threshold value two; Described transitional region is meant the zone of high reject signal intensity between threshold value one and threshold value two.
Described transitional region also can further be divided into interference-free coverage area transitional region and limited interference range transitional region.
The described resource reservation of step 3 comprises that each regional running time-frequency resource is reserved and special running time-frequency resource is reserved, and described two kinds of running time-frequency resources are reserved shared running time-frequency resource quadrature.
The time-frequency resource allocating mode of the described resource reservation part of step 3 comprises centralised allocation mode and distributed allocation mode.
Road loss compensation factor can be single value, centrifugal pump or successive value in the described transitional region; If the path loss factor in the transition region is centrifugal pump or successive value, the high reject signal intensity threshold that needs in the transition region then that the setting area divides.
In the described method, when determining running time-frequency resource, the running time-frequency resource that each zone is used keeps quadrature, and orthogonal manner is complete quadrature or accurate quadrature.
Described special running time-frequency resource is reserved and is arranged in the noiseless zone.
Step 6 specifically may further comprise the steps:
Step a: the high reject signal intensity of user terminal measurement, and report the base station;
Step b: the user terminal region is determined in the base station;
Step c: the loading condition of user terminal region is judged in the base station, if severe load or fully loaded, then execution in step d; Otherwise, execution in step e then;
Steps d: the QoS priority at user terminal place and the resource reservation of use are determined in the base station;
Step e: the road loss compensation factor of user terminal is determined in the base station;
Step f: the transmitting power of user terminal is calculated according to the part Poewr control method in the base station, and calculates the transmitting power of back adjustment by the uplink grant informing user terminal;
Step g: user terminal is with the transmitting power emission of base station notice.
Passing threshold of the present invention is determined cell interference source, in certain scope, the overhead when effectively having solved Inter-Cell Interference Coordination is excessive, round-trip delay is long and load is heavier or full load is difficult to guarantee that the shared running time-frequency resource of interference source is difficult to problems such as quadrature with the interference-limited of sub-district; By area dividing and time-frequency resource distribution mode based on limited interference source, solved the quadrature of guaranteeing running time-frequency resource when the running time-frequency resource of limited interference source distributed areas at the flexible dispatching of severe load or full load running time-frequency resource and the running time-frequency resource that separates different limited interference source, reduce the interference of minizone, the setting of transitional region makes the scheduling of running time-frequency resource more flexible, particularly when load increases, help keeping the quadrature of running time-frequency resource, divide threshold value by reasonable setting area simultaneously, the loading condition of zones of different in can allotting network, it is abundant to reach running time-frequency resource, reasonable use; Be provided with by different QoS priority, make when the scheduling running time-frequency resource, make the running time-frequency resource of the user terminal of high QoS priority keep complete quadrature as far as possible, user terminal for low QoS priority can adopt the quasi-orthogonal mode of running time-frequency resource, has improved the flexibility of high-level scheduling running time-frequency resource.When the sub-district is severe load or full load, when high-level scheduling, at first select the user terminal of high QoS priority to take completely orthogonal running time-frequency resource (running time-frequency resource that comprises zones of different is reserved and special running time-frequency resource reservation), guarantee service quality; Setting by road loss compensation factor a plurality of values in different sub-districts, cooperate the use of transition region simultaneously, further refinement cell coverage area, under the prerequisite that reduces to disturb, improve transmitting power as far as possible, reach the purpose that improves Cell Edge User terminal throughput and user terminal average throughput.
Description of drawings
Fig. 1 is the flow chart of the method for the invention;
Fig. 2 is a hierarchy schematic diagram of the present invention;
Fig. 3 is provided with schematic diagram for road loss compensation factor of the present invention;
Fig. 4 reserves for running time-frequency resource of the present invention and distributes schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated.
As shown in Figure 1, be the realization flow figure of inter-cell interference coordination method of the present invention, step is as follows:
Step 101: limited interference source selection threshold value is determined in the base station, is used for determining current base station is brought the adjacent area interference collection of base stations of interference;
Therefore flexibility when limited interference source selects threshold value will influence the number of interference source base station and time-frequency resource allocation, plays important effect according to different network demand choose reasonable threshold values to the reduction presence of intercell interference.
Step 102: base station interference signal strength signal intensity in the base station measurement adjacent cell list;
Step 103: the base station selects threshold value to determine base station in the limited interfered cell according to limited interference source;
The interference signal intensity of all adjacent cell base stations in the described base station measurement adjacent cell list, select threshold value to compare according to interference signal intensity of measuring and limited interference source, the limited interference source that selection selects all interference base stations conducts of threshold value to determine greater than limited interference source is finally determined the interference base station set of using in the sub-district.
Different base station in the cordless communication network can use different interference sources to select threshold value, so different interference source collection of base stations can be arranged.
Step 104: the area dividing threshold value is determined in the base station, and all limited interference source are carried out area dividing, specifically may further comprise the steps:
Step a: threshold value is divided in the setting area, base station;
Step b: the base station is divided into noiseless zone, limited interference region and transitional region according to threshold value with microzonation;
The area dividing threshold value the division that can have a strong impact on layering in the radio communication netting twine is set, also can therefore, can threshold value be set rationally divide network simultaneously by the different zone of different threshold scalings is set according to different network demands.
Being provided with of area dividing threshold value can also be played the effect of allocating load in cordless communication network.Certain regional load is heavier or fully loaded in cordless communication network, and other area load are light or during intermediate part load, can adjust the setting of threshold value, make the expanded range in the heavier or fully loaded zone of load, adjusting range enlarges the occupied running time-frequency resource of back loading simultaneously, it is the position of Physical Resource Block, make itself and other regional resource still keep quadrature, simultaneously, the road loss compensation factor of user terminal in the adjusting range enlarged area, the up-link transmission power of control different layers carry out the coordination of presence of intercell interference and Cell Edge User terminal throughput and the user terminal average throughput in the raising cordless communication network under not having the prerequisite of bandwidth loss.
Transitional region is a special region, in order further to divide network, can reset threshold value in transition region divides, for example, reset a new threshold value, transition region is divided into noiseless regional transition region and limited interference source zone transition region, more flexible when the running time-frequency resource of high-level scheduling user terminal like this.
Step 105: the time-frequency resource allocating mode of resource reservation part is determined in the base station;
Mainly be to determine to adopt distributed allocation or employing centralised allocation, because the scheduling of different method of salary distribution high levels will be very different.
Step 106: the QoS priority number of user terminal is determined in the base station;
For different networks different QoS priority numbers can be set, be convenient to high-level scheduling, increase the flexibility of running time-frequency resource scheduling.
The introducing of user terminal QoS priority has following effect:
(1) the quality of service requirement difference of the QoS priority of different user terminals, promptly, requirement to the interference coordination of minizone is also different, therefore, can be provided with by different QoS priority, make when the scheduling running time-frequency resource, make the running time-frequency resource of the user terminal of high QoS priority keep complete quadrature as far as possible, user terminal for low QoS priority can adopt the quasi-orthogonal mode of running time-frequency resource, has improved the flexibility of high-level scheduling running time-frequency resource.
(2) when the sub-district be severe load or full load, when high-level scheduling, at first select the user terminal of high QoS priority to take completely orthogonal running time-frequency resource (running time-frequency resource that comprises zones of different is reserved and special running time-frequency resource reservation), guarantee service quality.
(3) certain zone is severe load or fully loaded in the sub-district, and other zones are when being slight load or intermediate part load, when using for severe load or fully loaded zone by high-level scheduling the shared running time-frequency resource of slight load or intermediate part load zone, at first guarantee the use of the user terminal of high QoS priority for the resource reservation part.
When network is under the situation of slight load or intermediate part load, when not needing to use the running time-frequency resource of resource reservation part, in order to reduce the complexity of high-level scheduling, can not consider the QoS priority of user terminal, only, just can guarantee the running time-frequency resource quadrature that each is regional fully by region partitioning method of the present invention and time-frequency resource distribution mode.
When network is under severe load or the fully loaded situation, need to use the QoS priority of user terminal and the associating of resource reservation, at first guarantee the quality of service requirement of the user terminal of high QoS priority.
Step 107: the road loss compensation factor that each is regional is determined in the base station;
Road loss compensation factor can be provided with a plurality of values in different zones.But for complexity and the overhead that reduces high-level scheduling, each regional road loss compensation factor number will rationally be provided with according to the demand of cordless communication network; Each regional road loss compensation factor number can for bigger sub-district, can be provided with more road loss compensation factor in each zone according to the size reasonable adjustment of cell coverage area, further the refinement sub-district.
Being provided with of road loss compensation factor can be meticulousr than noiseless zone and limited interference region in the transitional region, and the purpose of doing like this is in order accurately to adjust the transmitting power of user terminal, to keep the running time-frequency resource of the particularly limited interference region user terminal of user terminal to keep quadrature as far as possible; Being provided with of road loss compensation factor can be single value, centrifugal pump, successive value in the transition region, when the path loss factor in the transition region is centrifugal pump, successive value, the strong jamming level signal strength threshold of wanting also in the transition region that the setting area divides, similar to the threshold value of distinguishing noiseless zone, transitional region, limited interference region;
The road loss compensation factor in limited interference source zone can also can be selected suitable road loss compensation factor respectively according to the power of disturbing for disturbing all base station area in the set to use identical road loss compensation factor.
Step 108: the running time-frequency resource that each is regional is determined in the base station;
This step mainly is that the running time-frequency resource of guaranteeing to carry out the limited interference region of interference coordination keeps quadrature; For noiseless zone, because it is less to be subjected to the interference of adjacent sub-district, so the quadrature demand of resource is not strong; Transitional region since need be in noiseless zone or limited interference region resource allocate when nervous, therefore, need partly keep quadrature to the running time-frequency resource of noiseless zone or limited interference region.
Step 109: the high reject signal intensity of user terminal measurement, and report the base station;
Be mainly used in the base station and determine residing zone of user terminal and road loss compensation factor according to high reject signal intensity.
Step 110: the user terminal region is determined in the base station;
The zone here is meant noiseless zone, transitional region, limited interference region, does not comprise each regional resource reservation part and special resource reservation part.
Step 111: the loading condition of user terminal region is judged in the base station, selects whether to use QoS priority for different loading conditions, and to reduce the complexity of high-level scheduling, if severe load or fully loaded, then execution in step 112; Otherwise then execution in step 114;
Step 112: the QoS priority at user terminal place is determined in the base station;
Step 113: the resource reservation of use is determined in the base station;
Resource reservation comprises resource reservation and the special resource reservation that each is regional.The use that special running time-frequency resource is reserved generally occurs in following situation:
(1) each regional resource reservation is taken fully;
(2) high layer resource scheduling encounters difficulties;
(3) needs in the cordless communication network satisfy the user terminal or the user terminal group of special service quality requirement.
Step 114: the road loss compensation factor of user terminal is determined in the base station;
For the resource reservation zone, can use and other different road loss compensation factors in zone, also can use fully and regional identical road loss compensation factor separately; For the special resource reserved area, being provided with of road loss compensation factor can be selected separately according to limit priority service quality in the QoS priority of user terminal.
Step 115: the transmitting power of user terminal is calculated in the base station according to the part Poewr control method;
Under the situation that fully takes into account sub-district internal burden situation and user terminal self, reach the purpose of interference coordination by the transmitting power of using the part power compensating method to adjust user terminal.
Step 116: the transmitting power that the back is adjusted is calculated by the uplink grant informing user terminal in the base station;
Step 117: user terminal is with the transmitting power emission of base station notice.
The time-frequency resource allocating mode of noiseless zone of the present invention, limited interference region, transitional region comprises:
(1) the complete quadrature method of salary distribution.In order to carry out effectively and reasonably scheduling, be provided with adjacent with it transitional region in each limited interference source distributed areas to the shared running time-frequency resource of limited interference source.The transitional region of limited interference source distributed areas and coupling is close to, and when guaranteeing the running time-frequency resource quadrature, can make the running time-frequency resource in interference-free coverage area territory and the running time-frequency resource of limited interference source zone and transitional region keep quadrature respectively.Help like this guaranteeing the quadrature of running time-frequency resource to reduce the interference of minizone at the flexible dispatching of severe load or full load running time-frequency resource and the running time-frequency resource that separates different limited interference source when the running time-frequency resource of limited interference source distributed areas.
(2) the accurate quadrature method of salary distribution.In order to reduce the complexity of system, when time-frequency resource allocating, the running time-frequency resource of noiseless zone and transitional region is put together, the noiseless zone that is called associating, the running time-frequency resource of transitional region perhaps is not set, in noiseless zone, comprise the running time-frequency resource when transitional region is set, be called the noiseless zone of merging.During time-frequency resource allocating, distributed allocation is carried out in limited interference source zone and the noiseless zone of associating or the noiseless zone of merging, the running time-frequency resource in the noiseless zone of the running time-frequency resource in employing limited interference source zone and the noiseless zone of associating or merging distributes at interval, when severe load or full load, can adopt the stronger zone of interference to use the complete quadrature of running time-frequency resource in the noiseless zone of limited interference source zone and noiseless zone of uniting or merging, and disturb more weak zone to use the limited interference source zone to keep quadrature, guarantee that each shared running time-frequency resource in zone keeps accurate quadrature.This mode has reduced the complexity of system, helps dispatching each regional running time-frequency resource more.
The present invention introduces transitional region, when user terminal is in this zone, can reach target transmit power by suitable adjustment road loss compensation factor, reduced other user terminals in the cell coverage area and the interference of adjacent sub-district, increase the flexibility when path loss compensates simultaneously, effectively increased the throughput and the user terminal average throughput of Cell Edge User terminal.
The present invention guarantees that by the introducing of two kinds of resource reservation the running time-frequency resource that takies keeps quadrature, helps guaranteeing minimum quality of service; When carrying out the trans-regional scheduling of running time-frequency resource, being reserved with of running time-frequency resource is beneficial to the minimum quality of service that guarantees zones of different; Because the presence of intercell interference in noiseless zone is very little even do not have, therefore, special running time-frequency resource is reserved and is generally positioned at noiseless zone, is convenient to when carrying out the trans-regional scheduling of running time-frequency resource like this guarantee that running time-frequency resource and other zones that special running time-frequency resource reserved area is shared keep quadrature.
The present invention is provided with by different QoS priority, make when the scheduling running time-frequency resource, make the running time-frequency resource of the user terminal of high QoS priority keep complete quadrature as far as possible, user terminal for low QoS priority can adopt the quasi-orthogonal mode of running time-frequency resource, has improved the flexibility of high-level scheduling running time-frequency resource.
Fig. 2 is the hierarchy schematic diagram of cordless communication network of the present invention.Wherein, Fig. 2 (a) has divided network for passing threshold the schematic diagram of noiseless zone, transitional region, limited interference region; Fig. 2 (b) is for being provided with a threshold value in the transition region, and transition region is divided into the schematic diagram of noiseless transition region and limited interference transition region, and the setting that the adjustment of zones of different can passing threshold is carried out flexibly.
Fig. 3 is provided with schematic diagram for road loss compensation factor of the present invention.Wherein, Fig. 3 (a) is for the noiseless zone of cell coverage area, limited interference region are provided with a road loss compensation factor respectively, and transition region is provided with a plurality of road loss compensation factors, i.e. the schematic diagram of a road loss compensation factor set; Fig. 3 (b) is for the noiseless zone of cell coverage area is provided with a road loss compensation factor, and transitional region is divided into interference-free coverage area transitional region and limited interference range transitional region, and each transitional region is provided with a road loss compensation factor set schematic diagram.
Wherein, the road loss compensation factor of transition region setting set can be set to single value, centrifugal pump and successive value according to the demand of cordless communication network, so that carry out equilibrium between the complexity of the validity of Inter-Cell Interference Coordination and power adjustment.
Fig. 4 is a time-frequency resource allocating schematic diagram of the present invention.The running time-frequency resource that mainly comprises zones of different is reserved: resource reservation is set respectively the zones of different of using in dividing for above-mentioned network and special running time-frequency resource is reserved.
Wherein, Fig. 4 (a) carries out the schematic diagram of centralised allocation for all resource reservation; Fig. 4 (b) carries out complete distributed allocation schematic diagram for all resource reservation; Fig. 4 (c) distributes separately for the special resource reserved part, and other regional resource reservation are divided into two parts, and are positioned over the head and the tail of the shared running time-frequency resource in corresponding region respectively.
All resource reservation of Fig. 4 (a) carry out centralised allocation, and therefore, high-rise scheduling of resource is simple, but can not dispatch separately each zone.
All resource reservation of Fig. 4 (b) carry out complete distributed allocation, can separate scheduling to each regional resource reservation and special resource reservation.
Fig. 4 (c) special resource reserved part is distributed separately, and other regional resource reservation are divided into two parts, and are positioned over the head and the tail of the shared running time-frequency resource in corresponding region respectively, like this can be more favourable when guaranteeing the running time-frequency resource quadrature.
Above-mentioned running time-frequency resource is reserved and must be guaranteed that the running time-frequency resource that takies keeps quadrature, helps guaranteeing minimum quality of service like this, and when carrying out the trans-regional scheduling of running time-frequency resource, being reserved with of running time-frequency resource is beneficial to the minimum quality of service that guarantees zones of different; Because the presence of intercell interference in noiseless zone is very little even do not have, therefore, special running time-frequency resource is reserved and is generally positioned at noiseless zone, is convenient to when carrying out the trans-regional scheduling of running time-frequency resource like this guarantee that running time-frequency resource and other zones that special running time-frequency resource reserved area is shared keep quadrature; Resource reservation carries out in the base station in the sub-district.
The foregoing description is not in order to qualification the present invention, any those skilled in the art, and without departing from the spirit and scope of the present invention, the modification of being done all is included in the application's the scope.
Claims (10)
1, a kind of inter-cell interference coordination method is characterized in that, may further comprise the steps:
Step 1: base station selected limited interference source;
Step 2: threshold value is divided in the setting area, base station, according to threshold value described limited interference source affiliated subdistrict is divided into noiseless zone, limited interference region and transitional region;
Step 3: the time-frequency resource allocating mode of resource reservation part is determined in the base station;
Step 4: the service quality priority number of user terminal is determined in the base station;
Step 5: road loss compensation factor and the running time-frequency resource that each is regional determined in the base station;
Step 6: the user terminal region is determined according to the interference signal intensity of user terminal to send up in the base station, and judge the loading condition that this is regional, if severe load or fully loaded, then the service quality priority at user terminal place and the resource reservation of use are at first determined in the base station, determine the road loss compensation factor of user terminal then, the transmitting power of user terminal is adjusted; Otherwise the road loss compensation factor of user terminal is directly determined in the base station, and the transmitting power of user terminal is adjusted.
2, inter-cell interference coordination method as claimed in claim 1 is characterized in that, described step 1 specifically may further comprise the steps:
Steps A: the base station is provided with limited interference source and selects threshold value;
Step B: all in the base station measurement adjacent cell list are disturbed the signal strength signal intensity of relay station;
Step C: the base station selected definite limited interference source of all interference base stations conducts of selecting threshold value greater than limited interference source.
3, inter-cell interference coordination method as claimed in claim 1, it is characterized in that, the described threshold value of step 2 comprises: be used to divide the threshold value one of noiseless zone and transitional region and the threshold value two that is used to divide transitional region and limited interference region, described threshold value one is less than described threshold value two, and described noiseless zone is meant the zone of high reject signal intensity less than territory threshold value one; Described limited interference region is meant the zone of high reject signal intensity greater than threshold value two; Described transitional region is meant the zone of high reject signal intensity between threshold value one and threshold value two.
As claim 1 or 3 described inter-cell interference coordination methods, it is characterized in that 4, described transitional region also can further be divided into interference-free coverage area transitional region and limited interference range transitional region.
5, inter-cell interference coordination method as claimed in claim 1 is characterized in that, the described resource reservation of step 3 comprises that each regional running time-frequency resource is reserved and special running time-frequency resource is reserved, and described two kinds of running time-frequency resources are reserved shared running time-frequency resource quadrature.
6, inter-cell interference coordination method as claimed in claim 1 is characterized in that, the time-frequency resource allocating mode of the described resource reservation part of step 3 comprises centralised allocation mode and distributed allocation mode.
7, inter-cell interference coordination method as claimed in claim 1 is characterized in that, in the described method, road loss compensation factor can be single value, centrifugal pump or successive value in the transitional region; If the path loss factor in the transition region is centrifugal pump or successive value, the high reject signal intensity threshold that needs in the transition region then that the setting area divides.
8, inter-cell interference coordination method as claimed in claim 1 is characterized in that, in the described method, when determining running time-frequency resource, the running time-frequency resource that each zone is used keeps quadrature, and orthogonal manner is complete quadrature or accurate quadrature.
9, inter-cell interference coordination method as claimed in claim 5 is characterized in that, described special running time-frequency resource is reserved and is arranged in the noiseless zone.
10, inter-cell interference coordination method as claimed in claim 1 is characterized in that, step 6 specifically may further comprise the steps:
Step a: the high reject signal intensity of user terminal measurement, and report the base station;
Step b: the user terminal region is determined in the base station;
Step c: the loading condition of user terminal region is judged in the base station, if severe load or fully loaded, then execution in step d; Otherwise, execution in step e then;
Steps d: the service quality priority at user terminal place and the resource reservation of use are determined in the base station;
Step e: the road loss compensation factor of user terminal is determined in the base station;
Step f: the transmitting power of user terminal is calculated by the part Poewr control method in the base station, and passes through the uplink grant informing user terminal and calculate the transmitting power that the back is adjusted;
Step g: user terminal is with the transmitting power emission of base station notice.
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| WO2012079337A1 (en) * | 2010-12-13 | 2012-06-21 | 中兴通讯股份有限公司 | Inter-cell interference coordination method and device in heterogeneous network |
| CN103120005A (en) * | 2010-10-03 | 2013-05-22 | 中兴通讯股份有限公司 | Method of interference management for radio link monitoring in HetNet |
| CN103327593A (en) * | 2012-03-21 | 2013-09-25 | 中国移动通信集团公司 | Self-adaption uplink power control method and mobile relay device |
| WO2013185279A1 (en) * | 2012-06-11 | 2013-12-19 | Renesas Mobile Corporation | Method and apparatus for interference coordination |
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| CN103813434A (en) * | 2012-11-12 | 2014-05-21 | 上海贝尔股份有限公司 | Power compensation method and device for user devices in communities |
| CN103841565A (en) * | 2014-03-19 | 2014-06-04 | 宇龙计算机通信科技(深圳)有限公司 | Interference coordination and measurement method and device, base station and terminal |
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| US5604730A (en) * | 1994-07-25 | 1997-02-18 | Qualcomm Incorporated | Remote transmitter power control in a contention based multiple access system |
| CN1210978C (en) * | 2002-03-29 | 2005-07-13 | 华为技术有限公司 | Power control method under base station selected diversity transmission |
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