CN106817702B - Method for adjusting edge frequency band and baseband processing unit - Google Patents
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Abstract
The application provides a method for adjusting an edge frequency band and a baseband processing unit. The method comprises the following steps: for each cell, the cell receives and stores the latest edge frequency band information sent by each adjacent cell with the PCImod3 result different from the cell, periodically calculates the total resource number required by all edge users of the cell, and adjusts the edge frequency band of the cell according to the total resource number required by all edge users of the cell and the latest edge frequency band information sent by each adjacent cell with the PCImod3 result different from the cell; wherein the initial edge band of each cell is divided as follows: the entire system band is uniformly divided into three sub-bands, and each sub-band is allocated to a cell having a value of pcmmod 3 ═ 0, pcmmod 3 ═ 1, and pcmmod 3 ═ 2 as an initial edge band according to the result of pcmmod 3. The method and the device have the advantages that the edge frequency band is reasonably distributed, and the system throughput is improved.
Description
Technical Field
The present application relates to the field of broadband trunking communication technologies, and in particular, to a method for adjusting an edge band and a baseband processing unit.
Background
With the rapid development of social economy and the change of the requirements of industrial customers, a Time Division Long Term Evolution (TD-LTE) broadband cluster with large bandwidth, high speed, full IP, efficient command control and real-Time response capability will lead cluster communication to enter a new era. The private network broadband multimedia trunking technology is tightly combined with industrial application, and the continuous improvement and rapid development of the TD-LTE broadband trunking communication system in the industry are promoted. The CCSA (china communication Standards Association) is the leading industry standard for TD-LTE broadband trunking communication, which is also the first industry standard based on 4G technology trunking in China.
In the broadband trunking communication system, the spectrum utilization and the QoS (Quality of Service) are important performance indexes of the system. In order to achieve high spectrum efficiency, the frequency reuse factor is close to 1 as much as possible when the network is deployed; in order to provide satisfactory service, it is necessary to guarantee QoS for users, particularly cell edge users. Because the frequencies used by the users in the cell are orthogonal to each other, and all interference comes from other cells, namely, the interference between the cells, effective measures must be taken to reduce the interference between the cells and improve the information transmission rate and the frequency spectrum utilization rate of the edge users.
The basic idea of Inter-Cell Interference Coordination (ICIC) is to control Inter-Cell Interference by managing radio resources, and is a multi-Cell radio resource management scheme considering conditions such as resource usage and load in a plurality of cells. Specifically, ICIC restricts the use of radio resources in each cell in an inter-cell coordination manner, including restricting the use of time-frequency resources or adjusting the transmission power of the time-frequency resources.
From the viewpoint of updating the edge band frequency, ICIC can be divided into two categories:
firstly, static interference coordination: the time scale for reconfiguring the use limit of the wireless resources is several days, and information exchange between the base stations is hardly needed.
Secondly, dynamic interference coordination: the time scale for reconfiguring the use restriction of the radio resource is several tens or several hundreds of milliseconds, and the frequency of the mutual information between the base stations is similar.
Static interference coordination cannot reasonably allocate edge frequency band resources according to user load changes, and the frequency spectrum utilization rate is low, so that dynamic interference coordination is most commonly used. The common dynamic interference coordination is that a source cell or a target cell determines a load information negotiation period, the source cell sends load information to the target cell in the negotiation period, and the target cell performs inter-cell interference coordination according to the load information after receiving the load information.
Therefore, the static interference coordination cannot reasonably allocate the edge frequency band resources according to the load change of the user, and the frequency spectrum utilization rate is low. At present, two problems mainly exist in a method for dynamically dividing an edge frequency band, one is that the load information of the whole cell of an adjacent cell is referred to for dividing the edge frequency band of a cell, but not the edge load information, so that the basis for dividing the frequency band is not accurate; the second problem is that load interaction periods need to be negotiated, each cell needs to maintain interaction periods with surrounding neighboring cells, and information is interacted according to the periods, so that the information interaction is frequent, and the realization is complex.
Disclosure of Invention
The embodiment of the application provides a method for adjusting an edge frequency band and a baseband processing unit.
The technical scheme of the application is realized as follows:
a method of adjusting an edge band, the method comprising:
for each cell, the cell receives and stores the latest edge frequency band information sent by each adjacent cell with the PCImod3 result different from the cell, periodically calculates the total resource number required by all edge users of the cell, and adjusts the edge frequency band of the cell according to the total resource number required by all edge users of the cell and the latest edge frequency band information sent by each adjacent cell with the PCImod3 result different from the cell;
wherein the initial edge band of each cell is divided as follows:
the entire system band is uniformly divided into three sub-bands, and each sub-band is allocated to a cell having a value of pcmmod 3 ═ 0, pcmmod 3 ═ 1, and pcmmod 3 ═ 2 as an initial edge band according to the result of pcmmod 3.
A baseband processing unit for adjusting edge frequency band comprises an adjusting module, which is used for receiving and storing the latest edge frequency band information sent by each adjacent cell whose PCImod3 result is different from the cell, periodically calculating the total resource number required by all edge users of the cell, adjusting the edge frequency band of the cell according to the total resource number required by all edge users of the cell and the latest edge frequency band information sent by each adjacent cell whose PCImod3 result is different from the cell,
the initial edge frequency band of the cell is determined by the following method:
the entire system band is uniformly divided into three sub-bands, and each sub-band is allocated to a cell having a value of pcmmod 3 ═ 0, pcmmod 3 ═ 1, and pcmmod 3 ═ 2 as an initial edge band according to the result of pcmmod 3.
It can be seen that, in the embodiment of the present application, the edge band of the local cell is periodically adjusted according to the total number of resources required by all edge users of the local cell and the latest edge band information sent by each neighboring cell different from the local cell according to the result of the PCImod3, so that the edge band is reasonably allocated, and the system throughput is improved.
Drawings
Fig. 1 is a flowchart of a method for adjusting an edge band according to an embodiment of the present application;
fig. 2 is a flowchart of a method for adjusting an edge band according to another embodiment of the present application;
fig. 3 is a schematic diagram of an LTE network topology applied in the embodiment of the present application;
fig. 4 is a schematic diagram of an initial edge band allocated to a cell according to an embodiment of the present application;
fig. 5 is a schematic diagram illustrating a baseband processing unit for adjusting an edge band according to an embodiment of the present disclosure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a flowchart of a method for adjusting an edge band according to an embodiment of the present application, which includes the following steps:
step 101: the entire system band is uniformly divided into three sub-bands, and each sub-band is allocated to a cell having a value of pcmmod 3 ═ 0, pcmmod 3 ═ 1, and pcmmod 3 ═ 2 as an initial edge band according to the result of pcmmod 3.
PCI is the Physical Cell identity (Physical Cell ID) and mod is the remainder operator.
Step 102: for each cell, the cell receives and stores the latest edge frequency band information sent by each adjacent cell with the result of PCImod3 different from that of the cell, periodically calculates the total resource number required by all edge users of the cell, and adjusts the edge frequency band of the cell according to the total resource number required by all edge users of the cell and the latest edge frequency band information sent by each adjacent cell with the result of PCImod3 different from that of the cell.
In one embodiment, in step 102, adjusting the edge band of the current cell according to the total number of resources required by all edge users of the current cell and the latest edge band information sent by each neighboring cell whose PCImod3 result is different from that of the current cell includes:
1) if N is presentm ’<NmThen, the edge band of the own cell is shrunk, and the size of the shrunk band is Nm–Nm ’Wherein N ism ’Calculated for the current periodTotal number of resources required by all edge users of the cell, NmThe current edge frequency band bandwidth of the local cell;
2) if N is presentm ’＝NmIf so, keeping the current edge frequency band of the cell unchanged;
3) if N is presentm ’>NmAnd then:
a. when N is presentm ’<N0And N ism<N0Then, the edge frequency band of the local cell is subjected to intra-cell frequency band expansion, and the size of the expanded frequency band is Nm ’-NmWherein N is0A bandwidth of an initial edge band for a cell;
b. when N is presentm ’>N0And N ism<N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing intra-cell band expansion and extra-cell band expansion on the edge frequency band of the cell, wherein the size of the intra-cell expanded frequency band is N0-NkThe band size of the out-of-cell extension is min (N)m ’-N0，Nk) (ii) a If N is presentkIf the frequency band size is less than or equal to 0, only the edge frequency band of the cell is subjected to intra-cell frequency band expansion, and the size of the intra-cell expanded frequency band is N0-Nm；
c. When N is presentm ’>N0And N ism>N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing out-of-cell band expansion on the edge band of the cell, wherein the expanded band size is min (N)m ’-Nm，Nk) (ii) a If N is presentkIf the current edge frequency band of the cell is 0, keeping the current edge frequency band of the cell unchanged; if N is presentk<0, the edge frequency band of the cell is shrunk, and the size of the shrunk frequency band is Nm-N0；
When the edge band of the own cell changes, the latest edge band information of the own cell is transmitted to each neighboring cell different from the own cell in result of PCImod 3.
In one embodiment, the puncturing the edge band of the cell includes:
uniformly shrinking from two ends of the edge frequency band of the local cell;
and performing intra-cell band expansion and extra-cell band expansion on the edge frequency band of the cell:
continuous intra-cell and extra-cell continuous band spreading is performed from one end of the edge band of the own cell.
In one embodiment, when the paging message sending time of the trunking group call arrives, the cell temporarily restores its edge frequency band to the initial edge frequency band, and when the paging message sending is finished, the edge frequency band before the paging message sending time is restored.
In one embodiment, in step 102, the latest edge band information sent by each neighboring cell includes: the starting PRB (Physical Resource Block) number and the ending PRB number of the latest edge band of the neighbor cell.
In one embodiment, in step 102, calculating the total number of resources required by all edge users of the current cell includes:
respectively calculating the number of resources required by each edge user of the cell, summing the number of resources required by all edge users of the cell to obtain the total number of resources required by all edge users of the cell,
the number of resources required by each edge user is as follows: the sum of the number of resources required for all GBR (Guaranteed bit rate) traffic of the edge user and the number of resources required for all non-GBR traffic of the edge user.
Fig. 2 is a flowchart of a method for adjusting an edge band according to another embodiment of the present application, which includes the following specific steps:
step 201: each cell in the LTE network is allocated an initial edge band.
Specifically, the entire system band is uniformly divided into three sub-bands, each of which has the same bandwidth and is 1/3 of the total bandwidth of the system band, and each sub-band is allocated to a cell having a PCI 3 of 0, a PCI 3 of 1, and a PCI 3 of 2 as an initial edge band according to the PCI of each cell (cell) and the result of PCI 3.
Wherein mod is the remainder operation sign.
Fig. 3 is a schematic diagram of an LTE network topology applied in the embodiment of the present application, and as shown in fig. 3, when the LET network performs PCI planning, the planning principle is as follows: avoiding the assignment of the same PCI as mod3 to neighbors.
When the initial edge frequency band is allocated to each cell, the bandwidth of the whole system frequency band is set to be 3N0And the unit is the number of PRBs (Physical Resource blocks), the entire system frequency band is divided into three sub-bands F0 uniformly from low to high according to the frequency:
F1：
F2：
each sub-band having a bandwidth of N0The results of PCImod3 for each cell were calculated, and F0 was assigned to each cell with PCImod3 ═ 0, F1 was assigned to each cell with PCImod3 ═ 1, and F2 was assigned to each cell with PCImod3 ═ 2, as shown in fig. 4.
For example: if 3 cells 1, 2, and 3 are set, then:
for cell 1: if pci mod3 is 1mod3 is 1, then F1 is allocated to cell 1 as the initial edge band;
for cell 2: PCImod3 ═ 2mod3 ═ 2, then F2 is allocated as the initial edge band to cell 2;
for cell 3: PCImod3 is 3mod3 is 0, and F0 is allocated to cell 3 as the initial edge band.
Step 202: for each cell, when the cell receives the latest edge frequency band information sent by any adjacent cell, the latest edge frequency band information of the adjacent cell is saved, the bandwidth of the latest edge frequency band of the adjacent cell is calculated and saved, the result of PCImod3 of the adjacent cell is calculated, and the maximum edge frequency band bandwidths of all adjacent cells under the result of PCImod3 are calculated and saved.
The latest edge band information sent by the neighboring cell includes: the start PRB sequence number and the end PRB sequence number of the latest edge band of the neighbor cell.
For each cell, it will only send the latest edge band information of this cell to the neighbor cell whose result is different from that of pci mod 3. For example: the cell with the result of PCImod3 of 0 only sends the latest edge frequency band information of the cell to each adjacent cell with the result of PCImod3 of 1 and the result of PCImod3 of 2; the cell with the result of 1 in PCImod3 only sends the latest edge frequency band information of the cell to each adjacent cell with the result of 0 in PCImod3 and 2 in PCImod 3; the cell with the result of 2 in pci 3 transmits the latest edge band information of the cell to each neighboring cell with the result of 0 in pci 3 and 1 in pci 3.
For example: assuming that the result of pci 3 of the own cell is 0 and the result of pci 3 is 1, the latest edge band information of the neighboring cell is transmitted: starting PRB serial number and ending PRB serial number, then the local cell calculates the latest edge band bandwidth of the adjacent cell, and then calculates and stores the maximum edge band bandwidth of all adjacent cells with the result of PCImod3 of 1 according to the latest edge band bandwidth of all adjacent cells with the result of PCImod3 stored by the local cell as 1.
Step 203: for each cell, in each edge frequency band adjustment period, the cell periodically calculates the total number of resources required by all edge users of the cell.
Specifically, the number of resources required by each edge user in the cell is calculated, and then the total number of resources required by all edge users in the cell is obtained by summing the number of resources required by all edge users in the cell.
Number of resources N required by all edge users of a cellm ’The calculation formula of (a) is as follows:
wherein UE _ Number represents the total Number of edge users of the cell, GBR _ NumuRepresents the total number of GBR services of user u, NonGBR _ NumuRepresents the total number of non-GBR services of the user u, Req _ Prb _ Num _ Dlu,iIndicates the number of PRBs required for the GBR service i of user u,
represents the number of PRBs required for non-GBR traffic j of user u,
is a rounded-down operation sign.
Step 204: for each cell, in each edge frequency band adjustment period, the cell obtains N of the cell according to calculationm ’And adjusting the edge band of the cell according to the maximum edge band bandwidth of the adjacent cell which is different from the result of the PCImod 3.
The specific processing in step 204 is as follows:
1) if N is presentm ’<NmThen, the edge frequency band of the local cell is shrunk, and the shrunk bandwidth size is Nm–Nm ’；
Wherein N ismIs the current edge band bandwidth of the cell.
In order to allow each cell to have a chance of high-frequency band extension on both sides fairly, when the band is narrowed, the cell is narrowed evenly from both ends of the edge band. For example: setting the bandwidth size of the local cell needing to be shrunk to be Nx，NxIs the number of PRBs, the low band of the edge band of the cell is punctured
Contracting the high frequency band of the edge frequency band of the local cell
Wherein,
is a rounded-down operation sign.
2) If N is presentm ’＝NmIf so, keeping the current edge frequency band of the cell unchanged;
3) if N is presentm ’>NmAnd then:
a. when N is presentm ’<N0And N ism<N0Then, the edge frequency band of the local cell is subjected to intra-cell frequency band expansion, and the expanded bandwidth is Nm ’-NmWherein N is0The bandwidth of the initial edge frequency band of the local cell;
b. when N is presentm ’>N0And N ism<N0When the result of PCImod3 is different from that of the own cell, the size N of the free band in the edge band of the adjacent cell with the largest edge band bandwidth is judgedkWhether or not it is Nk>0, if yes, performing intra-cell band expansion and extra-cell band expansion on the edge frequency band of the cell, wherein the size of the intra-cell expanded frequency band is N0-NkThe band size of the out-of-cell extension is min (N)m ’-N0，Nk) (ii) a If N is presentkIf the frequency band size is less than or equal to 0, only the edge frequency band of the cell is subjected to intra-cell frequency band expansion, and the size of the intra-cell expanded frequency band is N0-Nm；
For example: if the result of pci 3 in the own cell is 0, the size of the free band in the neighbor cell having the largest edge band bandwidth among all the neighbor cells having pci 3 ═ 1 is determined as Nk1Looking up the size of the idle band of the neighbor cell with the largest edge band bandwidth among all neighbor cells with 2 pci mod3, set as Nk2Let N stand fork＝max(Nk1，Nk2)。
c. When N is presentm ’>N0And N ism>N0When the result of PCImod3 is different from that of the own cell, the size N of the free band in the edge band of the adjacent cell with the largest edge band bandwidth is judgedkWhether or not it is Nk>0, if yes, performing out-of-cell band expansion on the edge band of the cell, wherein the expanded band size is min (N)m ’-Nm，Nk) (ii) a If N is presentkIf the current edge frequency band of the cell is 0, keeping the current edge frequency band of the cell unchanged; if N is presentk<0, the edge frequency band of the cell is shrunk, and the size of the shrunk frequency band is Nm-N0。
When the edge band of the own cell changes, the latest edge band information of the own cell is transmitted to each neighboring cell different from the own cell in result of PCImod 3.
It should be noted that, when the paging message transmission time of the trunking group call arrives, each cell needs to temporarily restore the edge frequency band to the initial edge frequency band, and when the paging message transmission is completed, the edge frequency band is restored to the edge frequency band before the paging message transmission time.
In the embodiment of the present application, to avoid disturbance in the PRB preemption process, when edge band extension is performed, only edge bands are allowed to sequentially extend to edge bands of adjacent cells, and non-continuous preemption of PRBs is not allowed. Still taking fig. 4 as an example, the initial edge band of the cell 3 with PCI mod3 ═ 0 is F0:
the initial edge band of the cell 1 with PCI mod3 ═ 1 is F1:
the initial edge band of the cell 2 with PCI mod3 ═ 2 is F2:
when Cell 3 performs edge band extension, it will sequentially move to
Or to
The directions of the two are sequentially expanded; when Cell 1 performs edge band extension, it will be towards
Or to
The directions of the two are sequentially expanded; when Cell 2 performs edge band extension, it will be towards
Or to f1，f2…, the directions expand in turn.
In practical applications, the execution subject of steps 202 to 204 in the embodiment of the present application is essentially a baseband processing unit corresponding to a cell.
The embodiment of the application is suitable for TD-LTE broadband cluster and other systems.
The beneficial technical effects of the embodiment of the application are as follows:
according to the embodiment of the application, the edge frequency band of the cell is dynamically adjusted periodically according to the total number of resources required by all edge users of the cell and the latest edge frequency band information sent by each adjacent cell different from the cell by the PCImod3 result, so that the edge frequency band is reasonably allocated, frequent information interaction and frequency band preemption conflict are avoided, and the system throughput is improved.
Fig. 5 is a schematic diagram of a baseband processing unit for adjusting an edge band according to an embodiment of the present application, where the baseband processing unit includes an adjusting module, configured to receive and store latest edge band information sent by neighboring cells different from a current cell according to a result of pci mod3, periodically calculate a total number of resources required by all edge users of the current cell, adjust an edge band of the current cell according to the total number of resources required by all edge users of the current cell and the latest edge band information sent by neighboring cells different from the current cell according to a result of pci mod3,
the initial edge frequency band of the cell is determined by the following method:
the entire system band is uniformly divided into three sub-bands, and each sub-band is allocated to a cell having a value of pcmmod 3 ═ 0, pcmmod 3 ═ 1, and pcmmod 3 ═ 2 as an initial edge band according to the result of pcmmod 3.
In one embodiment, the adjusting module adjusts the edge band of the cell according to the total number of resources required by all edge users of the cell and the latest edge band information sent by each neighboring cell whose PCImod3 result is different from that of the cell, where the adjusting module includes:
1) if N is presentm ’<NmThen, the edge band of the own cell is shrunk, and the size of the shrunk band is Nm–Nm ’Wherein N ism ’The total number of resources, N, required by all edge users of the cell is calculated for the current periodmThe current edge frequency band bandwidth of the local cell;
2) if N is presentm ’＝NmIf so, keeping the current edge frequency band of the cell unchanged;
3) if N is presentm ’>NmAnd then:
a. when N is presentm ’<N0And N ism<N0Then, the edge frequency band of the local cell is subjected to intra-cell frequency band expansion, and the size of the expanded frequency band is Nm ’-NmWherein N is0A bandwidth of an initial edge band for a cell;
b. when N is presentm ’>N0And N ism<N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing intra-cell band expansion and extra-cell band expansion on the edge frequency band of the cell, wherein the size of the intra-cell expanded frequency band is N0-NkThe band size of the out-of-cell extension is min (N)m ’-N0，Nk) (ii) a If N is presentkIf the frequency band size is less than or equal to 0, only the edge frequency band of the cell is subjected to intra-cell frequency band expansion, and the size of the intra-cell expanded frequency band is N0-Nm；
c. When N is presentm ’>N0And N ism>N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing out-of-cell band expansion on the edge band of the cell, wherein the expanded band size is min (N)m ’-Nm，Nk) (ii) a If N is presentkIf the current edge frequency band of the cell is 0, keeping the current edge frequency band of the cell unchanged; if N is presentk<0, the edge frequency band of the cell is shrunk, and the size of the shrunk frequency band is Nm-N0；
When the edge band of the own cell changes, the latest edge band information of the own cell is transmitted to each neighboring cell different from the own cell in result of PCImod 3.
In one embodiment, the narrowing the edge band of the local cell by the adjusting module includes:
uniformly shrinking from two ends of the edge frequency band of the local cell;
the adjusting module performs intra-cell band extension and extra-cell band extension on the edge frequency band of the cell, and comprises:
continuous intra-cell and extra-cell continuous band spreading is performed from one end of the edge band of the own cell.
In one embodiment, the adjustment module is further configured to,
when the sending time of the paging message of the cluster group calling arrives, the edge frequency band of the cell is temporarily recovered to the initial edge frequency band, and when the sending of the paging message is finished, the edge frequency band of the cell is recovered to the edge frequency band before the sending time of the paging message.
In one embodiment, the latest edge band information received by the adjusting module from each neighboring cell includes: the starting physical resource block PRB number and the ending PRB number of the latest fringe frequency band of the adjacent cell.
In one embodiment, the calculating, by the adjusting module, the total number of resources required by all edge users of the cell includes:
respectively calculating the number of resources required by each edge user of the cell, summing the number of resources required by all edge users of the cell to obtain the total number of resources required by all edge users of the cell,
the number of resources required by each edge user is as follows: the sum of the number of resources required for all guaranteed bit rate GBR traffic of the edge user and the number of resources required for all non-GBR traffic of the edge user.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (8)
1. A method for adjusting an edge band, the method comprising:
for each cell, the cell receives and stores the latest edge frequency band information sent by each adjacent cell with the PCImod3 result different from the cell, periodically calculates the total resource number required by all edge users of the cell, and adjusts the edge frequency band of the cell according to the total resource number required by all edge users of the cell and the latest edge frequency band information sent by each adjacent cell with the PCImod3 result different from the cell;
wherein the initial edge band of each cell is divided as follows:
dividing the whole system frequency band into three sub-frequency bands uniformly, and according to the result of the PCImod3, allocating each sub-frequency band to a cell with PCImod3 being 0, PCImod3 being 1 and PCImod3 being 2 as an initial edge frequency band;
the adjusting the edge band of the cell according to the total number of resources required by all edge users of the cell and the latest edge band information sent by each neighboring cell whose PCImod3 result is different from that of the cell includes:
1) if N is presentm’<NmThen, the edge band of the own cell is shrunk, and the size of the shrunk band is Nm–Nm', wherein Nm' Total resource number, N, required for all edge users of the cell calculated for the current periodmThe current edge frequency band bandwidth of the local cell;
2) if N is presentm’＝NmIf so, keeping the current edge frequency band of the cell unchanged;
3) if N is presentm’>NmAnd then:
a. when N is presentm’<N0And N ism<N0Then, the edge frequency band of the local cell is subjected to intra-cell frequency band expansion, and the size of the expanded frequency band is Nm’-NmWherein N is0A bandwidth of an initial edge band for a cell;
b. when N is presentm’>N0And N ism<N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing intra-cell band expansion and extra-cell band expansion on the edge frequency band of the cell, wherein the size of the intra-cell expanded frequency band is N0-NkThe band size of the out-of-cell extension is min (N)m’-N0，Nk) (ii) a If N is presentkIf the frequency band size is less than or equal to 0, only the edge frequency band of the cell is subjected to intra-cell frequency band expansion, and the size of the intra-cell expanded frequency band is N0-Nm；
c. When N is presentm’>N0And N ism>N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing out-of-cell band expansion on the edge band of the cell, wherein the expanded band size is min (N)m’-Nm，Nk) (ii) a If N is presentkIf the current edge frequency band of the cell is 0, keeping the current edge frequency band of the cell unchanged; if N is presentk<0, the edge frequency band of the cell is shrunk, and the size of the shrunk frequency band is Nm-N0；
When the edge frequency band of the cell changes, the latest edge frequency band information of the cell is sent to each adjacent cell which has a result different from that of the cell in PCImod 3;
the narrowing of the edge band of the cell includes:
uniformly shrinking from two ends of the edge frequency band of the local cell;
the performing intra-cell band extension and extra-cell band extension on the edge frequency band of the cell includes:
continuous intra-cell and extra-cell continuous band spreading is performed from one end of the edge band of the own cell.
2. The method of claim 1, further comprising:
when the sending time of the paging message of the cluster group calling arrives, the cell temporarily restores the edge frequency band of the cell to the initial edge frequency band, and when the sending of the paging message is finished, the edge frequency band before the sending time of the paging message is restored.
3. The method of claim 1, wherein the latest edge band information sent by each neighboring cell comprises: the starting physical resource block PRB number and the ending PRB number of the latest fringe frequency band of the adjacent cell.
4. The method according to claim 1, wherein the calculating the total number of resources required by all edge users of the cell comprises:
respectively calculating the number of resources required by each edge user of the cell, summing the number of resources required by all edge users of the cell to obtain the total number of resources required by all edge users of the cell,
the number of resources required by each edge user is as follows: the sum of the number of resources required for all guaranteed bit rate GBR traffic of the edge user and the number of resources required for all non-GBR traffic of the edge user.
5. A baseband processing unit for adjusting edge band, which is characterized in that the unit comprises an adjusting module for receiving and storing the latest edge band information transmitted by each neighboring cell whose PCImod3 result is different from the cell, periodically calculating the total resource number required by all edge users of the cell, adjusting the edge band of the cell according to the total resource number required by all edge users of the cell and the latest edge band information transmitted by each neighboring cell whose PCImod3 result is different from the cell,
the initial edge frequency band of the cell is determined by the following method:
dividing the whole system frequency band into three sub-frequency bands uniformly, and according to the result of the PCImod3, allocating each sub-frequency band to a cell with PCImod3 being 0, PCImod3 being 1 and PCImod3 being 2 as an initial edge frequency band;
the adjusting module adjusts the edge band of the cell according to the total number of resources required by all edge users of the cell and the latest edge band information sent by each neighboring cell different from the cell according to the result of the PCImod3, including:
1) if N is presentm’<NmThen, the edge band of the own cell is shrunk, and the size of the shrunk band is Nm–Nm', wherein Nm' Total resource number, N, required for all edge users of the cell calculated for the current periodmThe current edge frequency band bandwidth of the local cell;
2) if N is presentm’＝NmIf so, keeping the current edge frequency band of the cell unchanged;
3) if N is presentm’>NmAnd then:
a. when N is presentm’<N0And N ism<N0Then, the edge frequency band of the local cell is subjected to intra-cell frequency band expansion, and the size of the expanded frequency band is Nm’-NmWherein N is0Bandwidth of initial edge band for cell；
b. When N is presentm’>N0And N ism<N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing intra-cell band expansion and extra-cell band expansion on the edge frequency band of the cell, wherein the size of the intra-cell expanded frequency band is N0-NkThe band size of the out-of-cell extension is min (N)m’-N0，Nk) (ii) a If N is presentkIf the frequency band size is less than or equal to 0, only the edge frequency band of the cell is subjected to intra-cell frequency band expansion, and the size of the intra-cell expanded frequency band is N0-Nm；
c. When N is presentm’>N0And N ism>N0In the meantime, for a neighboring cell corresponding to the maximum edge band width under two results of PCImod3, the result of PCImod3 is different from that of the neighboring cell, the size N of the idle band of the neighboring cell is determinedkWhether or not it is Nk>0, if yes, performing out-of-cell band expansion on the edge band of the cell, wherein the expanded band size is min (N)m’-Nm，Nk) (ii) a If N is presentkIf the current edge frequency band of the cell is 0, keeping the current edge frequency band of the cell unchanged; if N is presentk<0, the edge frequency band of the cell is shrunk, and the size of the shrunk frequency band is Nm-N0；
When the edge frequency band of the cell changes, the latest edge frequency band information of the cell is sent to each adjacent cell which has a result different from that of the cell in PCImod 3;
the adjusting module shrinks the edge frequency band of the cell, including:
uniformly shrinking from two ends of the edge frequency band of the local cell;
the adjusting module performs intra-cell band extension and extra-cell band extension on the edge frequency band of the cell, and comprises:
continuous intra-cell and extra-cell continuous band spreading is performed from one end of the edge band of the own cell.
6. The unit of claim 5, wherein the adjustment module is further configured to,
when the sending time of the paging message of the cluster group calling arrives, the edge frequency band of the cell is temporarily recovered to the initial edge frequency band, and when the sending of the paging message is finished, the edge frequency band of the cell is recovered to the edge frequency band before the sending time of the paging message.
7. The unit according to claim 5, wherein the latest edge band information received by the adjusting module from each neighboring cell includes: the starting physical resource block PRB number and the ending PRB number of the latest fringe frequency band of the adjacent cell.
8. The unit according to claim 5, wherein the adjusting module calculates the total number of resources required by all edge users of the cell includes:
respectively calculating the number of resources required by each edge user of the cell, summing the number of resources required by all edge users of the cell to obtain the total number of resources required by all edge users of the cell,
the number of resources required by each edge user is as follows: the sum of the number of resources required for all guaranteed bit rate GBR traffic of the edge user and the number of resources required for all non-GBR traffic of the edge user.
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| CN101534525A (en) * | 2008-03-14 | 2009-09-16 | 中兴通讯股份有限公司 | Inter-cell united frequency hopping method, uplink transmission method and resource borrowing method |
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| CN102726085A (en) * | 2011-06-28 | 2012-10-10 | 华为技术有限公司 | Method, processor and base station for frequency band resource allocation |
| CN103826228A (en) * | 2014-02-26 | 2014-05-28 | 大唐移动通信设备有限公司 | Method and device for planning and allocating resources |
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| CN101534525A (en) * | 2008-03-14 | 2009-09-16 | 中兴通讯股份有限公司 | Inter-cell united frequency hopping method, uplink transmission method and resource borrowing method |
| CN102469463A (en) * | 2010-11-04 | 2012-05-23 | 中兴通讯股份有限公司 | Method, device, system and equipment for allocating marginal frequency resource |
| CN102726085A (en) * | 2011-06-28 | 2012-10-10 | 华为技术有限公司 | Method, processor and base station for frequency band resource allocation |
| CN103826228A (en) * | 2014-02-26 | 2014-05-28 | 大唐移动通信设备有限公司 | Method and device for planning and allocating resources |
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