CN102307353A - Method for realizing interference coordination by combining multi-frequency hopping way and inter-cell information interaction - Google Patents
Method for realizing interference coordination by combining multi-frequency hopping way and inter-cell information interaction Download PDFInfo
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Abstract
The invention relates to the technical field of cellular communication, and discloses a method for realizing interference coordination by combining a multi-frequency hopping way and inter-cell information interaction. When a user in a cell performs uplink communication, the inter-cell interference coordination is realized by judging a frequency-hopping way of the user and combining the inter-cell information interaction in the specific frequency-hopping way. By the method, the inter-cell interference coordination is performed by combining the multi-frequency hopping way and the inter-cell information interaction, so that a communication system utilizes frequency-hopping characteristics, and the performance of an edge user of the cell and the performance of the whole cell are improved at the same time.
Description
Technical field
The present invention relates to the cellular telecommunication art field, relate in particular to the disturbance coordination method that a kind of multi-hop frequency mode combines with cell-to-cell information interaction.
Background technology
OFDMA (OFDM) has been widely used in the next generation wireless communication network, such as 802.16e (WiMAX) and 3GPP LTE.Because the PARP of traditional OFDM (OFDM) technology (all peak ratios) is higher; On portable terminal, realize having certain difficulty, therefore a kind of follow-on DFT-S-OFDM (discrete Fourier transform single-carrier OFDMA) is used as the uplink multi-address scheme of ofdma communication system.DFT-S-OFDM can be divided into centralized and distributed dual mode, and wherein distributed DFT-S-OFDM can obtain good frequency diversity gain.But then, distributed DFT-S-OFDM exists shortcomings such as frequency synchronization error and Doppler frequency sensitivity, channel estimating performance are relatively poor; The very big characteristics of centralized DFT-S-OFDM realize exactly simply, but can't obtain good frequency diversity gain.Based on the pluses and minuses of above-mentioned dual mode, through further investigation, 3GPP LTE has abandoned distributed way, but in order to remedy centralized DFT-S-OFDM in the defective aspect the frequency selectivity Fen Ji, has proposed the frequency hopping mode based on centralized DFT-S-OFDM.
In 3GPP LTE; Centralized DFT-S-OFDM frequency hopping makes UE (subscriber equipment) only take continuous frequency in some moment; Continue to take place and jump to another frequency band constantly at the next one; And the frequency according to frequency hopping is different, can be divided into Intra-TTI FH (frequency hopping in the TTI) and Inter-TTI FH (frequency hopping between TTI) dual mode.For example; In example shown in Figure 1; The RTT (round-trip delay) that adds HARQ (hybrid heavily referring to automatically asked) is 4 TTI (Transmission Time Interval), and then Inter-TTI FH is exactly whenever at a distance from 4 TTI frequency hoppings once, and Intra-TTI FH is that frequency hopping is once between two time slots of a TTI.
3GPP LTE regulation ascending frequency-hopping has two types: Type 1 frequency hopping and Type 2 frequency hoppings.In Type 1 frequency hopping mode; Portable terminal can be that 1 mode is carried out Intra-TTI and Inter-TTI frequency hopping simultaneously with the cycle; Can be that 2 mode is carried out the Inter-TTI frequency hopping also, be known as " based on the frequency hopping mode of frequency hopping information in detail in the scheduling events " with the cycle.In the Type2 mode, frequency range is divided into a plurality of subbands, and portable terminal can also carry out mirror image in frequency hopping, and frequency hopping is relevant with sub-district PCI (Physical Cell Identifier) with mirror image pattern, is that the sub-district is specific.Therefore, Type2 frequency hopping mode also is known as " based on the frequency hopping mode of subband sub-district specific mirror picture/frequency hopping pattern ".
Simultaneously, from the frequency diversity, Type2 frequency hopping mode is compared with Type1, and frequency hopping pattern is flexible, in frequency hopping, can also carry out mirror image, and hop period both can obtain better frequency diversity for 1 TTI also can be 10 TTI; From presence of intercell interference randomization level, the frequency hopping in the Type2 frequency hopping mode is all relevant with cell ID PCI with mirror image, and interference randomization is effective; But frequency hopping pattern is complicated; Be not easy to Inter-Cell Interference Coordination, the Type1 frequency hopping pattern is clear and definite, is easy to Inter-Cell Interference Coordination.
Cell-to-cell information interaction is accomplished through distinctive mode; And in different cellular communication systems, has different features; As in 3GPP LTE, the 3GPP decision is accomplished cell-to-cell information interaction in up employing based on high interference indication (HII) and overload indication (OI) information.According to the network architecture of E-UTRAN, the wireline interface X2 between the adjacent eNode B can be used for transmitting HII and OI.An eNode B is when distributing to a Cell Edge User with a physical frequencies Resource Block (PRB); But owing to predict this user's interfere neighbor cell; Also receive simultaneously the interference of neighbor cell UE easily, just this responsive PRB is circulated a notice of to neighbor cell through HII.ENode B can judge whether this UE is in cell edge through normal Reference Signal Received Power (RSRP) value of measuring in the UE handoff procedure, can certainly make this judgement more accurate through further measurement.After neighbor cell eNode B receives HII, then avoid the cell edge UE of oneself also is dispatched on this PRB, or reduce interference as far as possible this PRB.When eNode B monitors certain PRB when having received uplink interference, send OI to neighbor cell, indicate this PRB to be interfered.Neighbor cell just can suppress to disturb by uplink power control.
HII, OI have following characteristics:
● the minimum update cycle of HII and OI is 20ms;
● HII and OI have frequency selectivity, and promptly each PRB sends one;
● OI adopts absolute value representation;
● OI is divided into Three Estate, representes basic, normal, high interference level respectively.And HII is " forecast " those " responsive " PRB, therefore only representes with 1bit whether this PRB needs Additional Protection to get final product;
● HII and OI transmit with the mode of " Event triggered ";
● different HII is sent in adjacent sub-district.
In uplink communication, can obtain certain frequency diversity through frequency hopping, can also obtain certain interference randomization effect simultaneously, but owing to do not introduce Inter-Cell Interference Coordination, the cell-edge performance gain is also not obvious.Simultaneously, information interaction can be carried out in the minizone, thereby allows the sub-district can combine the scheduling of resource situation of neighbor cell to carry out the resource allocation of this sub-district, carries out Inter-Cell Interference Coordination.Be in 200810083397 the one Chinese patent application " inter-cell united frequency hopping method; ascending transmission method; resource borrowing method " at application number; Though utilized the thought of carrying out interference coordination alternately of minizone information equally; But in the method; Information interaction is carried out in all minizones; In order to reach the effect of Inter-Cell Interference Coordination; Twice information interaction of priority will be carried out at least in the minizone; Immediately be extended down to is to accomplish the mutual twice (HII of primary information less; The mutual cycle of OI is at least 20ms); Simultaneously; Because the polytropy and the professional polytropy of channel; Unpredictable variation can take place in the scheduling of resource situation of when the twice information interaction, delaying neighbor cell, has a strong impact on the gain that interference coordination brings.
Summary of the invention
(1) technical problem that will solve
The technical problem that the present invention will solve is: how in performance frequency hopping communications characteristics, to carry out Inter-Cell Interference Coordination, improve community marginal user performance and whole estate performance.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides the disturbance coordination method that a kind of multi-hop frequency mode combines with cell-to-cell information interaction, comprise step:
S1, if the Physical Cell Identifier PCI of whole network remains unchanged; Then directly change step S6 over to; Otherwise; In conjunction with the PCI of each sub-district by specific mode networking; That is, all microzonations are divided into A group, B group and C organize three types, wherein; A seven cell bunch center cell belongs to the A group, alternate B and the C group of being divided into of edge cell;
S2, empty the dispatch state of sub-district, and for redistributing resource in each sub-district: to sub-district in the A group, when the concrete frequency hopping mode of configuration, frequency range is divided into the M group, sets the frequency hopping bit arbitrarily, be user's dividing frequency resource, directly change step S1 then over to; To sub-district in B or the C group, the distance of user and base station in the calculation plot, and should distance do comparison with predetermined threshold value, if distance is denoted as edge customer with this user so, otherwise is denoted as central user, M＞1 greater than threshold value;
S3, all frequency resources of sub-district are divided into continuous N section, and each segment labeling is 1,2...N is the edge customer basis corresponding frequency band that the frequency range of n is defined as sub-district in B or the C group simultaneously with label;
S4, at first give each edge customer, then other resources of frequency range are distributed to central user the resource allocation of edge customer basis corresponding frequency band; After having assigned; If the resource of frequency range is not all distributed, also have edge customer unallocated simultaneously to frequency resource, so this residual frequency resource is continued to distribute to edge customer according to polling algorithm; And the triggering cell information interaction sends generation cell-to-cell information interaction transmission request;
S5, if no cell-to-cell information interaction sends asks, directly change step S6 over to; Otherwise; Judge whether this time slot is that cell-to-cell information interaction sends point; If not; Directly change step S6 over to; If; Merging was sent point from last cell-to-cell information interaction and is sent all cell-to-cell information interaction requests in this sub-district of point to this cell-to-cell information interaction, and sent the minizone interactive information after merging to neighbor cell;
S6, when the sub-district receives the minizone interactive information, if the sub-district belongs to A group, then do not do any response, if the sub-district belongs to B or C group, then upgrade the tabulation of neighbor cell edge customer scheduling of resource, storage neighbor cell edge customer scheduling situation;
S7, to sub-district in the A group, if there is new user to insert, then directly change step S2 over to, number otherwise calculate the shared frequency resource of each user according to timeslot number and frequency hopping formula, by being numbered each user's dividing frequency resource, directly change step S1 over to simultaneously; To sub-district in B or the C group; Judge whether this time slot is scheduling readjustment point; If not scheduling readjustment point; Judged whether that so new user inserts request; When having new user to insert request; Produce the request of new user's access dispatching, the sub-district is not this new user's dividing frequency resource then, directly changes step S8 simultaneously over to; If this time slot is scheduling readjustment point, the edge customer scheduling of resource of this sub-district neighbor cell tabulation is simultaneously upgraded to some extent, and the request of still untreated new user's access dispatching is perhaps arranged in the sub-district, adjusts the Resource Allocation Formula in the sub-district so;
S8, according to this Cell Edge User scheduling result, judge whether the request of sending of triggering cell information interaction;
S9, judge that whether timeslot number is that cell-to-cell information interaction sends point, if not, directly change step S1 over to; Otherwise, merged from last cell-to-cell information interaction transmission point and send all cell-to-cell information interaction requests in this sub-district of point to this cell-to-cell information interaction, and the minizone interactive information after neighbor cell sends merging.
Wherein, among the step S1, the mode that all microzonations is divided into three types is specially: be one bunch with 7 sub-districts, every bunch center cell adopts the Type2 frequency hopping in the ascending frequency-hopping of 3GPP LTE regulation, called after A group; Alternate two groups of B, the C that are divided in remaining six sub-districts, the Type1 frequency hopping type in the ascending frequency-hopping of employing 3GPP LTE regulation, and the concrete frequency hopping configuration of each sub-district is identical in the group.
Wherein, the adjustment cycle of networking mode is identical with the dynamic adjustment cycle of PCI among the step S1.
Wherein, the concrete frequency hopping that adopts the Type1 type to carry out all sub-districts of frequency hopping among the step S2 disposes identical.
Wherein, Edge customer basis corresponding frequency band is defined as among the step S3: when there is the edge customer service request sub-district; At first dispatch it on basic corresponding frequency band the sub-district; If basic corresponding frequency band frequency resource is not enough; And vacant resource is arranged on other frequency ranges, the sub-district just can be with its scheduling on other frequency ranges; Simultaneously, the interior frequency hopping mode of group that employing Type1 frequency hopping type carries out frequency hopping is identical, and the basic corresponding frequency band of edge customer is identical.
Wherein, when having new user to insert in the sub-district of adopting Type1 type frequency hopping or to have edge customer to be scheduled on the frequency range of non-correspondence, this sub-district triggering cell information interaction sends, and produces cell-to-cell information interaction and sends request among the step S4.
Wherein, among the step S5, cell-to-cell information interaction sends point and is fixing time slot, and periodically repeats, and former and later two time intervals of sending point are the minimum update cycle of cell-to-cell information interaction; Minizone interactive information merging method by: put high frequency numbering, the time slot that produces this request and Type1 frequency hopping formula based on institute's requirements in each request the request of sending of this cell-to-cell information interaction be mapped to the minizone interactive information of cell-to-cell information interaction when sending point, the minizone interactive information merging after then all being shone upon.Wherein, Mapping mode is: calculate according to Type1 frequency hopping formula according to the time slot that requires in each request to put the frequency numbering of height (put height and be meant that based on high interference indication HII be 1) and produce this request and send some frequency numbering constantly, this frequency numbering is the minizone interactive information after the mapping.
Wherein, during minizone interactive information among the step S6 after the sub-district receives merging, adopt the sub-district of Type2 mode frequency hopping not do any response, and the edge customer scheduling of resource that adopts the sub-district of Type1 frequency hopping mode will upgrade neighbor cell is tabulated; Wherein, the tabulation of the edge customer scheduling of resource of neighbor cell is tabulated in the shared frequency resource of this time slot for the neighbor cell edge customer.
Wherein, The fixedly time slot that is defined as the periodicity repetition of scheduling readjustment point among the step S7; Only the sub-district just can be carried out frequency resource and redistributed on this time slot; For each user redistributes the frequency hopping starting point; After having assigned, the user can carry out frequency hopping according to fixing mode from this frequency hopping starting point in the sub-district before point is resetted in next one scheduling; Simultaneously, only the sub-district just can be for asking the new user's dividing frequency resource that inserts on point is resetted in scheduling.
Wherein, The concrete adjustment principle of the Resource Allocation Formula among the step S7 in the adjustment sub-district is: according to the edge customer scheduling of resource tabulation of neighbor cell; Obtain on the edge customer basis corresponding frequency band of neighbor cell and this sub-district identical frequency resource and gather, be i.e. conflicted resource; At first give edge customer, give central user with the frequency resource allocation on the non-basic corresponding frequency band then other frequency resource allocation of removing conflicted resource on the basic corresponding frequency band; After above-mentioned two processes completion distribution; Detect and whether still have edge customer unallocated to frequency resource; If there is edge customer unallocated to frequency resource; So at first these certain customers are dispatched on the frequency resource that non-basic corresponding frequency band is not assigned with; After having assigned; If still have edge customer unallocated, so conflicted resource distributed to this part edge customer to frequency resource; At last, if there is central user unallocated, then give this part central user with all residual frequency resource allocations to frequency resource.Distribution each time in the concrete assigning process all realizes according to polling algorithm.
Wherein, The concrete trigger condition of triggering cell information interaction transmission request is among the step S8: when the sub-district has taken the basic corresponding frequency band of non-Cell Edge User or discharged the basic corresponding frequency band of non-Cell Edge User; Triggering cell information interaction, otherwise triggering cell information interaction not.
Wherein, among the step S8, scheduling reset point receiving cell-to-cell information interaction constantly after, scheduling cycle that cycle and the cell-to-cell information interaction of point send of resetting is identical, 2 do not overlap.
(3) beneficial effect
The present invention carries out Inter-Cell Interference Coordination through the mode that multi-hop frequency mode combines with cell-to-cell information interaction, makes communication system in performance frequency hopping characteristics, improve community marginal user performance and whole estate performance.
Description of drawings
Fig. 1 is Inter-TTI and Intral-TTI frequency hopping instance graph;
Fig. 2 is a method flow diagram of the present invention;
Fig. 3 is each cell group and the networking situation sketch map that adopts the frequency hopping mode;
Fig. 4 is that cell-to-cell information interaction sends point, minizone information information interaction merges the mode sketch map;
Fig. 5 is that a minizone information information interaction merges instance graph;
Fig. 6 is that cell-to-cell information interaction sends point and scheduling readjustment point function and correlation sketch map;
Fig. 7 is the corresponding frequency band sketch map of each Cell Edge User;
Fig. 8 is an A group sub-district frequency-hopping resource assigning process sketch map;
Fig. 9 is B (or C) group sub-district frequency-hopping resource assigning process sketch map.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to illustrate the present invention, but are not used for limiting scope of the present invention.
As shown in Figure 2, the present invention combines characteristics and the cell-to-cell information interaction characteristic of two kinds of ascending frequency-hopping schemes (Type1 and Type2 in the ascending frequency-hopping of 3GPP LTE regulation), has proposed a kind of new inter-cell interference coordination method.When user in the sub-district carries out uplink communication, at first judge user's frequency hopping mode, in concrete frequency hopping mode, carry out Inter-Cell Interference Coordination then in conjunction with the minizone interactive information.This method may further comprise the steps:
S1) if whole network PCI (Physical Cell Identifier) remains unchanged, directly change step S6 over to, otherwise, by specific mode networking, all microzonations are divided into three types in conjunction with the PCI of each sub-district.Be one bunch with 7 sub-districts, every bunch center cell adopts the Type2 frequency hopping, called after A group; Alternate two groups of B, the C that are divided in remaining six sub-districts adopt the Type1 frequency hopping type, and the concrete frequency hopping configuration of each sub-district is identical in the group, as shown in Figure 3.Wherein, to the flow process of A group sub-district as shown in Figure 8, the flow process that B and C are organized the sub-district as shown in Figure 9.
S2) empty the dispatch state of sub-district, and for redistributing resource in each sub-district.To sub-district in the A group, when the concrete frequency hopping mode of configuration, frequency range is divided into M (M＞1) group, set hopping bits (frequency hopping bit) arbitrarily, adopting polling algorithm is user's dividing frequency resource, directly changes step S1 over to).To sub-district in B or the C group, the distance of user and base station in the calculation plot, and should distance do comparison with certain threshold value.If distance is greater than threshold value, this user is denoted as edge customer so, otherwise is denoted as central user.
S3) all frequency resources of sub-district are divided into continuous N (N=4 or 2) section, and each segment labeling is 1,2...N.Be the edge customer basis corresponding frequency band that the frequency range of n (or (n+1) %N) is defined as sub-district in B (or C) group simultaneously with label.Wherein, % representes to ask mould.
S4) at first give each edge customer with the resource allocation of edge customer basis corresponding frequency band, according to polling algorithm other resources of frequency range are distributed to central user then according to polling algorithm.After having assigned; If the resource of frequency range is not all distributed, also have edge customer unallocated simultaneously to frequency resource, so this residual frequency resource is continued to distribute to edge customer according to polling algorithm; And the triggering cell information interaction sends generation cell-to-cell information interaction transmission request.
S5) if no cell-to-cell information interaction sends request, directly change step S6 over to).Otherwise, judge whether this time slot is that cell-to-cell information interaction sends point, if not, directly change step S6 over to); If, merged from last cell-to-cell information interaction transmission point and send all cell-to-cell information interaction requests in this sub-district of point to this cell-to-cell information interaction, and the minizone interactive information after neighbor cell sends merging.
When S6) it receives the minizone interactive information when the sub-district,, then do not do any response,, then upgrade the tabulation of neighbor cell edge customer scheduling of resource, storage neighbor cell edge customer scheduling situation if the sub-district belongs to B (or C) group if the sub-district belongs to the A group.
S7) to sub-district in the A group,, then directly change step S2 over to if there is new user to insert), otherwise calculate the shared frequency resource numbering of each user according to timeslot number and frequency hopping formula, by being numbered each user's dividing frequency resource, directly change step S1 over to simultaneously).To sub-district in B (or C) group; Judge whether this time slot is scheduling readjustment point; If not scheduling readjustment point; Judged whether that so new user inserts request; When having new user to insert request; Produce the request of new user's access dispatching, the sub-district is not this new user's dividing frequency resource then, directly changes step S8 simultaneously over to).If this time slot is scheduling readjustment point, the edge customer scheduling of resource of this sub-district neighbor cell tabulation is simultaneously upgraded to some extent, and the request of still untreated new user's access dispatching is perhaps arranged in the sub-district, adjusts the Resource Allocation Formula in the sub-district so.Concrete adjustment principle is: according to the edge customer scheduling of resource tabulation of neighbor cell, obtain on the edge customer basis corresponding frequency band of neighbor cell and this sub-district identical frequency resource and gather (being conflicted resource); At first give edge customer, give central user with the frequency resource allocation on the non-basic corresponding frequency band then other frequency resource allocation of removing conflicted resource on the basic corresponding frequency band; After above-mentioned two processes completion distribution; Detect and whether still have edge customer unallocated to frequency resource; If there is edge customer unallocated to frequency resource; So at first these certain customers are dispatched on the frequency resource that non-basic corresponding frequency band is not assigned with; After having assigned; If still have edge customer unallocated, so conflicted resource distributed to this part edge customer to frequency resource; At last, if there is central user unallocated, then give this part central user with all residual frequency resource allocations to frequency resource.Distribution each time in the concrete assigning process all realizes according to polling algorithm.
In this step, the mode of in the various network framework, calculating the shared frequency resource numbering of each user is different, can be with reference to frequency hopping computing formula among the 3GPP 36213-930 like the computational methods in LTE.
S8), judge whether that the triggering cell information interaction sends request according to this Cell Edge User scheduling result.Concrete trigger condition is: when the sub-district has taken the basic corresponding frequency band of non-Cell Edge User or discharged this type resource (the basic corresponding frequency band of non-Cell Edge User); The triggering cell information interaction; Otherwise triggering cell information interaction not, as shown in Figure 7.
S9) judge whether timeslot number is that cell-to-cell information interaction sends point; As shown in Figure 4; If not; Directly change step S1 over to); Otherwise; Merging was sent point from last cell-to-cell information interaction and is sent all cell-to-cell information interaction requests in this sub-district of point to this cell-to-cell information interaction, as shown in Figure 5, and the minizone interactive information after the neighbor cell transmission merges.Wherein, cell-to-cell information interaction sends a relation that point and scheduling reset as shown in Figure 6.
In the above-mentioned steps, according to all sub-district PCI, seven cell bunch center cell adopts Type2 frequency hopping mode, when the user belongs to this type of sub-district, carries out the frequency hopping relevant with PCI and timeslot number simultaneously.In the frequency hopping process, no matter whether the used frequency resource of edge customer conflicts with the neighbor cell generation, the triggering cell information interaction does not send, and simultaneously the minizone interactive information that received neighbor cell sent in the frequency hopping process is ignored.In addition, only when new user inserted, intra-cell resource was just redistributed, and the frequency resource allocation algorithm is a polling algorithm.Other six sub-districts are divided into two groups by alternate in the seven cell bunch, and every group is all adopted Type1 frequency hopping mode, and the basic corresponding frequency band of each Cell Edge User is identical in the group.Can guarantee so under the situation of subscriber traffic smaller (frequency resource that is basic corresponding frequency band is enough) on the edge of that presence of intercell interference can be avoided again in the sub-district of adopting Type1 mode frequency hopping when obtaining the frequency hopping gain.When edge customer traffic carrying capacity bigger (frequency resource that is basic corresponding frequency band is not enough); If other frequency ranges have the residue available frequency resources; Edge customer can also be scheduled on this part frequency resource so; Can obtain the tabulation of neighbor cell edge customer scheduling of resource situation through the minizone interactive information simultaneously, thereby further coordinate interference among adjacent cells.
In step S4, S7, S8, resource regulating method is: adopt the sub-district of Type2 frequency hopping mode to adopt polling algorithm; That adopts Type1 frequency hopping mode divides into two kinds of scheduling schemes for a short time.Wherein adopt two kinds of scheduling schemes specific descriptions of Type1 frequency hopping mode sub-district to be:
The needed frequency resource sum of pre-estimation edge customer if required sum, is checked the tabulation of neighbor cell scheduling of resource so less than the frequency resource number on the basic corresponding frequency band, obtains the resource collection F of neighbor cell scheduling on this basis corresponding frequency band
NeighSimultaneously, suppose that the total resources set on this basis corresponding frequency band is F
Total, so at first according to polling algorithm with edge customer scheduling at F
Total-F
NeighOn, if resource is not enough, be scheduled in F again
NeighOn.The user dispatches after the completion on the edge of, gives central user with other frequency resource allocation again.
The needed frequency resource sum of pre-estimation edge customer; If required sum is greater than the frequency resource number on the primary band; So at first at first give edge customer with the frequency resource allocation on all basic corresponding frequency band according to polling algorithm; After having assigned; Have the part edge user unallocated to frequency resource, the set of supposing this part user is U
UnOther resources are distributed to central user according to polling algorithm, and after having assigned, if resources left is arranged, U is given in reallocation
Un
Among the step S9, twice cell-to-cell information interaction sends cell-to-cell information interaction between point and sends request merging mode and do, and obtain j minizone information information interaction and send the timeslot number n of request generation, and the indication t on i frequency resource
i(j, n), i=1,2 ... N, j=1,2 ... K, wherein N is total frequency resource number, K sends minizone information information interaction total between point at twice minizone information information interaction to send the request number.The timeslot number of supposing the point of minizone information information interaction transmission next time is m, calculates t according to the frequency hopping formula
i(j, m), the indication on i the frequency resource after merging so
The above only is an execution mode of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (12)
1. the disturbance coordination method that multi-hop frequency mode combines with cell-to-cell information interaction is characterized in that, comprises step:
S1, if the Physical Cell Identifier PCI of whole network remains unchanged; Then directly change step S6 over to; Otherwise; In conjunction with the PCI of each sub-district by specific mode networking; That is, all microzonations are divided into A group, B group and C organize three types, wherein; A seven cell bunch center cell belongs to the A group, alternate B and the C group of being divided into of edge cell;
S2, empty the dispatch state of sub-district, and for redistributing resource in each sub-district: to sub-district in the A group, when the concrete frequency hopping mode of configuration, frequency range is divided into the M group, sets the frequency hopping bit arbitrarily, be user's dividing frequency resource, directly change step S1 then over to; To sub-district in B or the C group, the distance of user and base station in the calculation plot, and should distance do comparison with predetermined threshold value, if distance is denoted as edge customer with this user so, otherwise is denoted as central user, M＞1 greater than threshold value;
S3, all frequency resources of sub-district are divided into continuous N section, and each segment labeling is 1,2...N is the edge customer basis corresponding frequency band that the frequency range of n is defined as sub-district in B or the C group simultaneously with label;
S4, at first give each edge customer, then other resources of frequency range are distributed to central user the resource allocation of edge customer basis corresponding frequency band; After having assigned; If the resource of frequency range is not all distributed, also have edge customer unallocated simultaneously to frequency resource, so this residual frequency resource is continued to distribute to edge customer according to polling algorithm; And the triggering cell information interaction sends generation cell-to-cell information interaction transmission request;
S5, if no cell-to-cell information interaction sends asks, directly change step S6 over to; Otherwise; Judge whether this time slot is that cell-to-cell information interaction sends point; If not; Directly change step S6 over to; If; Merging was sent point from last cell-to-cell information interaction and is sent all cell-to-cell information interaction requests in this sub-district of point to this cell-to-cell information interaction, and sent the minizone interactive information after merging to neighbor cell;
S6, when the sub-district receives the minizone interactive information, if the sub-district belongs to A group, then do not do any response, if the sub-district belongs to B or C group, then upgrade the tabulation of neighbor cell edge customer scheduling of resource, storage neighbor cell edge customer scheduling situation;
S7, to sub-district in the A group, if there is new user to insert, then directly change step S2 over to, number otherwise calculate the shared frequency resource of each user according to timeslot number and frequency hopping formula, by being numbered each user's dividing frequency resource, directly change step S1 over to simultaneously; To sub-district in B or the C group; Judge whether this time slot is scheduling readjustment point; If not scheduling readjustment point; Judged whether that so new user inserts request; When having new user to insert request; Produce the request of new user's access dispatching, the sub-district is not this new user's dividing frequency resource then, directly changes step S8 simultaneously over to; If this time slot is scheduling readjustment point, the edge customer scheduling of resource of this sub-district neighbor cell tabulation is simultaneously upgraded to some extent, and the request of still untreated new user's access dispatching is perhaps arranged in the sub-district, adjusts the Resource Allocation Formula in the sub-district so;
S8, according to this Cell Edge User scheduling result, judge whether the request of sending of triggering cell information interaction;
S9, judge that whether timeslot number is that cell-to-cell information interaction sends point, if not, directly change step S1 over to; Otherwise, merged from last cell-to-cell information interaction transmission point and send all cell-to-cell information interaction requests in this sub-district of point to this cell-to-cell information interaction, and the minizone interactive information after neighbor cell sends merging.
2. the method for claim 1; It is characterized in that among the step S1, the mode that all microzonations is divided into three types is specially: be one bunch with 7 sub-districts; Type2 frequency hopping in the ascending frequency-hopping of every bunch center cell employing 3GPP LTE regulation, called after A group; Alternate two groups of B, the C that are divided in remaining six sub-districts, the Type1 frequency hopping type in the ascending frequency-hopping of employing 3GPP LTE regulation, and the concrete frequency hopping configuration of each sub-district is identical in the group.
3. method as claimed in claim 2 is characterized in that, the adjustment cycle of networking mode is identical with the dynamic adjustment cycle of PCI among the step S1.
4. method as claimed in claim 2 is characterized in that, the concrete frequency hopping that adopts the Type1 type to carry out all sub-districts of frequency hopping among the step S2 disposes identical.
5. method as claimed in claim 2; It is characterized in that; Edge customer basis corresponding frequency band is defined as among the step S3: when there is the edge customer service request sub-district; At first dispatch it on basic corresponding frequency band the sub-district; If basic corresponding frequency band frequency resource is not enough; And vacant resource is arranged on other frequency ranges, the sub-district just can be with its scheduling on other frequency ranges; Simultaneously, the interior frequency hopping mode of group that employing Type1 frequency hopping type carries out frequency hopping is identical, and the basic corresponding frequency band of edge customer is identical.
6. method as claimed in claim 2; It is characterized in that; Among the step S4 when having new user to insert in the sub-district of adopting Type1 type frequency hopping or to have edge customer to be scheduled on the frequency range of non-correspondence; This sub-district triggering cell information interaction sends, and produces cell-to-cell information interaction and sends request.
7. method as claimed in claim 2 is characterized in that, among the step S5, cell-to-cell information interaction sends point and is fixing time slot, and periodically repeats, and former and later two time intervals of sending point are the minimum update cycle of cell-to-cell information interaction; Minizone interactive information merging method by: put high frequency numbering, the time slot that produces this request and Type1 frequency hopping formula based on institute's requirements in each request the request of sending of this cell-to-cell information interaction be mapped to the minizone interactive information of cell-to-cell information interaction when sending point, the minizone interactive information merging after then all being shone upon.
8. method as claimed in claim 2; It is characterized in that; During minizone interactive information among the step S6 after the sub-district receives merging, adopt the sub-district of Type2 mode frequency hopping not do any response, and the edge customer scheduling of resource that adopts the sub-district of Type1 frequency hopping mode will upgrade neighbor cell is tabulated; Wherein, the tabulation of the edge customer scheduling of resource of neighbor cell is tabulated in the shared frequency resource of this time slot for the neighbor cell edge customer.
9. method as claimed in claim 2; It is characterized in that; The fixedly time slot that is defined as the periodicity repetition of scheduling readjustment point among the step S7; Only the sub-district just can be carried out frequency resource and redistributed on this time slot; For each user redistributes the frequency hopping starting point; After having assigned, the user can carry out frequency hopping according to fixing mode from this frequency hopping starting point in the sub-district before point is resetted in next one scheduling; Simultaneously, only the sub-district just can be for asking the new user's dividing frequency resource that inserts on point is resetted in scheduling.
10. method as claimed in claim 2; It is characterized in that; The concrete adjustment principle of the Resource Allocation Formula among the step S7 in the adjustment sub-district is: according to the edge customer scheduling of resource tabulation of neighbor cell; Obtain on the edge customer basis corresponding frequency band of neighbor cell and this sub-district identical frequency resource and gather, be i.e. conflicted resource; At first give edge customer, give central user with the frequency resource allocation on the non-basic corresponding frequency band then other frequency resource allocation of removing conflicted resource on the basic corresponding frequency band; After above-mentioned two processes completion distribution; Detect and whether still have edge customer unallocated to frequency resource; If there is edge customer unallocated to frequency resource; So at first these certain customers are dispatched on the frequency resource that non-basic corresponding frequency band is not assigned with; After having assigned; If still have edge customer unallocated, so conflicted resource distributed to this part edge customer to frequency resource; At last, if there is central user unallocated, then give this part central user with all residual frequency resource allocations to frequency resource.Distribution each time in the concrete assigning process all realizes according to polling algorithm.
11. method as claimed in claim 2; It is characterized in that; The concrete trigger condition of triggering cell information interaction transmission request is among the step S8: when the sub-district has taken the basic corresponding frequency band of non-Cell Edge User or discharged the basic corresponding frequency band of non-Cell Edge User; Triggering cell information interaction, otherwise triggering cell information interaction not.
12. method as claimed in claim 2 is characterized in that, among the step S8, scheduling reset point receiving cell-to-cell information interaction constantly after, scheduling cycle that cycle and the cell-to-cell information interaction of point send of resetting is identical, 2 do not overlap.
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| CN106537945A (en) * | 2014-07-17 | 2017-03-22 | 高通股份有限公司 | Type 1 and type 2 hopping for device-to-device communications |
| CN106537945B (en) * | 2014-07-17 | 2020-04-28 | 高通股份有限公司 | Type1and type2hopping for device-to-device communication |
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| CN115002909A (en) * | 2022-04-29 | 2022-09-02 | 国网智能电网研究院有限公司 | Interference coordination method and device for transmission equipment Internet of things and electronic equipment |
| CN115002909B (en) * | 2022-04-29 | 2023-09-01 | 国网智能电网研究院有限公司 | Interference coordination method and device for Internet of things of power transmission equipment and electronic equipment |
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