CN104519578A - Method and apparatus for selecting cells from plurality of cells to perform intermittent transmission - Google Patents

Method and apparatus for selecting cells from plurality of cells to perform intermittent transmission Download PDF

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Publication number
CN104519578A
CN104519578A CN201310454545.5A CN201310454545A CN104519578A CN 104519578 A CN104519578 A CN 104519578A CN 201310454545 A CN201310454545 A CN 201310454545A CN 104519578 A CN104519578 A CN 104519578A
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community
cell
small
described multiple
interval
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姜宇
云翔
陈岚
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NTT Docomo Inc
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NTT Docomo Inc
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Priority to CN201310454545.5A priority Critical patent/CN104519578A/en
Priority to JP2014196290A priority patent/JP6546381B2/en
Publication of CN104519578A publication Critical patent/CN104519578A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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

Abstract

The invention discloses a method and apparatus for selecting cells from a plurality of cells to perform intermittent transmission. The method comprises the following steps that: interference information of each cell from the plurality of cells, and at least one kind of data selected from the number of users of predetermined types in each cell and the historical intermittent transmission frequency of each cell are acquired, wherein the interference information of each cell indicates the degree of interferences which are exerted on the other cells in the plurality of cells by the cell; and at least one cell is selected from the plurality of cells to perform intermittent transmission based on the interference information of each cell and at least one kind of data selected from the number of the users of predetermined types in each cell and the historical intermittent transmission frequency of each cell. With the method and apparatus of the invention adopted, at least one cell can be properly selected from the plurality of cells to perform intermittent transmission, and therefore, interferences between the cells can be decreased, and negative impact on the performance of a whole communication system can be avoided, and performance deterioration which is caused by a situation in which one or many cells are selected frequently to perform intermittent transmission can be avoided.

Description

The method and apparatus carrying out the community that interval sends is selected from multiple community
Technical field
The present invention relates to the technology reducing presence of intercell interference, and relate more specifically to a kind of method and apparatus of selecting to carry out the community that interval sends from multiple community.
Background technology
In the mobile communication network, multiple macrocell (or macro base station) is disposed to provide service to mobile subscriber.But, in the region that the user in such as gymnasium and shopping center and so on concentrates, only rely on macrocell that enough network capacity often can not be provided to provide good service for user.Therefore, except macrocell, multiple small-cell (small cell) can also be disposed thick and fast in such region, namely the community that transmitting power is less and/or coverage is less compared with macrocell, such as Microcell (micro cell), picocell (pico cell) etc., and provide service by macrocell and these small-cells to user.
But may produce interference between multiple small-cells of dense deployment, and the density of the small-cell disposed is larger, the interference between small-cell is more serious.In order to address this problem, propose and making small-cell carry out interval transmission with the method reducing the interference between them.In a kind of conventional method, for each transmission interval, (mute) is closed in the small-cell making current business load minimum, namely data transmission is not carried out at this transmission interval in this small-cell, thus reduce the interference that other small-cells (especially its edge customer) are subject to, the throughput of the user of other small-cells is increased, improves the performance of these users thus.On the other hand, selected the user's (especially central user) carrying out the small-cell that interval sends cannot send data in this transmission interval owing to sending interval at certain, thus generation data send delay, the throughput of the user of this small-cell is reduced, causes the hydraulic performance decline of these users.Under many circumstances, the performance gain that the small-cell selected in the manner described above carries out intermittently sending to the user of other small-cells to bring often can not make up the hydraulic performance decline of the user due to it, thus causes the hydraulic performance decline of communication system.
Therefore, when deploying multiple small-cell, need a kind of new method and apparatus, it can for each transmission interval, the small-cell of carrying out interval transmission is suitably selected from described multiple small-cell, to reduce the interference between community, avoid causing larger negative effect to the performance of communication system simultaneously.
Summary of the invention
Consider above problem and made the present invention.An object of the present invention is to provide a kind of method and apparatus of selecting to carry out the community that interval sends from multiple community, by described method and apparatus, can for each transmission interval, from described multiple community, suitably select at least one community carry out interval to send, thus the interference between reduction community, avoid causing larger negative effect to the performance of whole communication system simultaneously.
According to an aspect of the present invention, provide a kind of method of selecting to carry out the community that interval sends from multiple community, comprise: obtain at least one in the interfere information of each community in described multiple community, the quantity of user of predefined type of described each community and the history interval transmission frequency of described each community, wherein the interfere information of each community represents the annoyance level of this community to other communities in described multiple community; And based at least one in the quantity of the interfere information of each community, the user of predefined type and history interval transmission frequency, the community selecting at least one to carry out interval from described multiple community to send.
According to a further aspect in the invention, provide a kind of equipment of selecting to carry out the community that interval sends from multiple community, comprise: information acquisition device, be configured to obtain at least one in the interfere information of each community in described multiple community, the quantity of user of the predefined type of described each community and the history interval transmission frequency of described each community, wherein the interfere information of each community represents the annoyance level of this community to other communities in described multiple community; And cell selecting apparatus, be configured to based at least one in the quantity of the interfere information of each community, the user of predefined type and history interval transmission frequency, the community selecting at least one to carry out interval from described multiple community to send.
Utilize the method and apparatus according to the above-mentioned aspect of the present invention, for each transmission interval, can select to carry out at least one in the history interval transmission frequency of the quantity of user's (such as central user) of the annoyance level of other communities, the predefined type of each community and each community (such as, carrying out number of times that interval sends or time in the past in scheduled time slot) community that interval sends according to each community.The performance gain of the user of other communities when closing this community at this transmission interval can be reflected to the annoyance level of other communities due to each community, the quantity of the user of the predefined type of this community can reflect the performance loss when closing the user of the predefined type of Shi Gai community, this community at transmission interval, therefore, described performance gain can be made as far as possible large according to the community of these Information Selection, and make described performance loss as far as possible little, thus improve the performance of whole communication system, simultaneously, certain or some communities can be avoided to be selected too continually to carry out interval to send, thus avoid its performance significantly to worsen.
Accompanying drawing explanation
Embodiments of the present invention is described in detail in conjunction with the drawings, and above and other objects of the present invention, feature, advantage will become apparent.In the accompanying drawings, identical reference number represents identical element from start to finish, wherein:
Fig. 1 shows the example communication system can applying embodiments of the invention wherein.
Fig. 2 is the flow chart selecting the method for carrying out the community that interval sends from multiple community illustrated according to a first embodiment of the present invention.
Fig. 3 is the flow chart that a kind of exemplary approach performing the step S202 shown in Fig. 2 is shown.
Fig. 4 shows the example selecting the process of at least one small-cell according to the mode shown in Fig. 3 from 6 small-cells.
Fig. 5 is the block diagram selecting the equipment carrying out the community that interval sends from multiple community illustrated according to a first embodiment of the present invention.
Fig. 6 is the flow chart selecting the method for carrying out the community that interval sends from multiple community illustrated according to a second embodiment of the present invention.
Fig. 7 is the block diagram selecting the equipment carrying out the community that interval sends from multiple community illustrated according to a second embodiment of the present invention.
Fig. 8 is the flow chart selecting the method for carrying out the community that interval sends from multiple community illustrated according to a third embodiment of the present invention.
Fig. 9 is the block diagram selecting the equipment carrying out the community that interval sends from multiple community illustrated according to a third embodiment of the present invention.
Figure 10 is the flow chart selecting the method for carrying out the community that interval sends from multiple community illustrated according to a fourth embodiment of the present invention.
Figure 11 is the block diagram selecting the equipment carrying out the community that interval sends from multiple community illustrated according to a fourth embodiment of the present invention.
Embodiment
The method and apparatus of selecting to carry out the community that interval sends from multiple community according to the embodiment of the present invention is described below with reference to accompanying drawings.Described community can be small-cell mentioned above, such as Microcell and picocell etc., also can be the community of the other types except small-cell, such as macrocell etc.Hereinafter, will describe embodiments of the invention for small-cell, this description is also applicable to the community of other types.
First, with reference to Fig. 1, the example communication system can applying embodiments of the invention is wherein described.This example communication system can be such as LTE(Long Term Evolution) communication system or LTE-Advanced communication system, in this communication system, access network can adopt centralized Radio Access Network (C-RAN) framework.As shown in Figure 1, in C-RAN framework, centralized base station eNodeB is connected to block core (EPC) network of evolution, and comprise Base Band Unit (BBU) pond and the multiple remote radio equipments (RRE) being connected to this BBU pond, described multiple RRE is controlled by the corresponding BBU in BBU pond respectively, and be deployed in different positions, thus form multiple small-cell.May there be one or more user (that is, user equipment (UE)) each small-cell.In FIG, for the ease of diagram, 3 BBU1-3 and 3 RRE1-3 are shown, these three RRE form three small-cell 1-3, and each small-cell has respective user, wherein, exemplarily, UE1 is the central user of small-cell 1, and UE2 is the edge customer of small-cell 1.As described above, interference may be produced between the 1-3 of small-cell.As shown in Figure 1, the edge customer UE2 of small-cell 1 is subject to the interference of small-cell 2.Will be appreciated that, the quantity of RRE, BBU and the UE shown in Fig. 1 is exemplary, also can there is RRE, BBU and UE of other quantity.
In the example communication system shown in Fig. 1, can for each transmission interval, utilize and from described multiple small-cell, select at least one small-cell according to the method and apparatus of the embodiment of the present invention and closed (mute), thus eliminate the interference of this small-cell to other small-cells.
Briefly, according to the embodiment of the present invention select from multiple small-cell carry out the method for small-cell that interval sends and comprise: obtain at least one in the interfere information of each small-cell in described multiple small-cell, the quantity of user of predefined type of described each small-cell and the history interval transmission frequency of described each small-cell, wherein the interfere information of each small-cell represents the annoyance level of this small-cell to other communities in described multiple small-cell; And based at least one in the quantity of the interfere information of each small-cell, the user of predefined type and history interval transmission frequency, the small-cell selecting at least one to carry out interval from described multiple small-cell to send.The equipment carrying out the small-cell that interval sends of selecting from multiple small-cell according to the embodiment of the present invention comprises: information acquisition device, be configured to obtain at least one in the interfere information of each small-cell in described multiple small-cell, the quantity of user of the predefined type of described each small-cell and the history interval transmission frequency of described each small-cell, wherein the interfere information of each small-cell represents the annoyance level of this small-cell to other communities in described multiple small-cell; And cell selecting apparatus, be configured to based at least one in the quantity of the interfere information of each small-cell, the user of predefined type and history interval transmission frequency, the small-cell selecting at least one to carry out interval from described multiple small-cell to send.
Next, with reference to specific embodiments of the invention, the present invention is described.
(the first embodiment)
Below, the flow chart of the method for the small-cell that interval sends is carried out in the selection from multiple small-cell described according to a first embodiment of the present invention with reference to Fig. 2.The method can perform in the eNodeB shown in Fig. 1.Such as, can arrange in the eNodeB shown in Fig. 1 be operationally couple to BBU pond small-cell controller to perform the method.
As shown in Figure 2, in step s 201, obtain the interfere information of each small-cell in described multiple small-cell, wherein the interfere information of each small-cell represents the annoyance level of this small-cell to other small-cells in described multiple small-cell.
In the present embodiment, for each small-cell, can be used in described multiple small-cell be subject to this small-cell interference small-cell (namely, victim cell) quantity represent the annoyance level of this small-cell to other small-cells, the victim cell of this small-cell is more, then the annoyance level of this small-cell to other small-cells is higher, otherwise, the victim cell of this small-cell is fewer, then the annoyance level of this small-cell to other small-cells is lower.In this case, the interfere information of each small-cell can be the value of the quantity of the victim cell representing this small-cell.
The quality of reception measurement report that can receive according to the user from each small-cell determines the quantity of the victim cell of each small-cell.Such as, in the example depicted in fig. 1, for small-cell 1, the quality of reception measurement report that can receive according to the user from other all small-cells (i.e. small-cell 2 and 3) determines the quantity of the victim cell of small-cell 1.Particularly, the Reference Signal Received Power (RSRP) of its Serving cell (i.e. small-cell 2) and the RSRP of small-cell 1 can be measured by each user of small-cell 2, and this quality of reception measurement report is sent to base station.In a base station, such as in the BBU2 corresponding with small-cell 2 or in the controller of above-mentioned small-cell, the difference between these two RSRP can be calculated, and determine whether described difference is greater than predetermined threshold, this threshold value can need according to design and/or the actual conditions of mobile communications network are suitably arranged, such as, can be set to 6dB.If described difference is less than this threshold value, then can think that small-cell 2,1 pair, small-cell causes interference, namely small-cell 2 is victim cell of small-cell 1; Otherwise if described difference is not less than this threshold value, then can think that interference is not caused in small-cell 2,1 pair, small-cell, namely small-cell 2 is not the victim cell of small-cell 1.Equally, the RSRP of its Serving cell (i.e. small-cell 3) and the RSRP of small-cell 1 can be measured by each user of small-cell 3, and determine that whether small-cell 3 is the victim cell of small-cell 1 in the manner described above.Like this, the quantity of the victim cell of small-cell 1 can be determined.For small-cell 2, said process can be performed by each user of other all communities (that is, small-cell 1 and 3) similarly, thus determine the quantity of the victim cell of small-cell 2.For small-cell 3, said process can be performed by each user of other all communities (that is, small-cell 1 and 2) similarly, thus determine the quantity of the victim cell of small-cell 3.Will be appreciated that, although use RSRP to determine victim cell hereinbefore, also can represent that the parameter (such as Reference Signal Received Quality RSRQ, Signal to Interference plus Noise Ratio SINR etc.) of the quality of reception is to determine victim cell similarly by other.
In step S202, based on the interfere information of each small-cell determined in step S201, from described multiple small-cell, select the small-cell of carrying out interval transmission.
Particularly, a small-cell with the value of maximum interfere information can be selected from described multiple small-cell, as the small-cell of carrying out interval transmission.In this case, the quantity of the victim cell of each small-cell can be compared simply, and select small-cell that victim cell quantity is maximum as the small-cell of carrying out interval and sending.
Alternatively, several small-cells can be selected from described multiple small-cell, as the small-cell of carrying out interval transmission.This selection can be carried out with various ways.In the first way of example, the quantity of described multiple small-cell according to victim cell can be sorted, and from the small-cell that victim cell is maximum, select several small-cells as the small-cell of carrying out interval transmission.In the second way of example, from described multiple small-cell, sequentially can select to have the value (that is, the quantity of victim cell) of maximum interfere information and meet at least one small-cell of predetermined condition, as the small-cell of carrying out interval and sending.Below in conjunction with Fig. 3 and Fig. 4, this second way of example for performing step S202 is described, wherein Fig. 3 shows the flow chart of this second way of example, and Fig. 4 shows the example utilizing this second way of example to select the process of at least one small-cell from 6 small-cells.
As shown in Figure 3, in step S301, can be described multiple small-cells opening relationships figure, this graph of a relation reflects the interference relationships between the quantity of the victim cell of each small-cell and each small-cell.In the example depicted in fig. 4, false exist 6 small-cells, and namely small-cell #1 is to small-cell #6, and the quantity of their victim cell is respectively 2,1,2,0,1 and 3, then can be the graph of a relation that these 6 communities set up as shown in Figure 4 (a).In this graph of a relation, circle represents corresponding small-cell, the quantity of the victim cell of this small-cell of digitized representation in circle, and the arrow between two circles represents the interference relationships between two corresponding small-cells, wherein the circle of arrow tail and arrowhead is corresponding respectively causes the small-cell of interference and the victim cell of this small-cell.
Next, in step s 302, the small-cell selecting victim cell quantity maximum from described multiple small-cell is as the small-cell will carrying out interval transmission.In the example depicted in fig. 4, because the victim cell quantity of small-cell #6 is maximum, therefore select small-cell #6 as the small-cell of carrying out interval transmission, as shown in the gray circles in Fig. 4 (b).Here, for convenience of description, kth is expressed as G by the performance gain level that the small-cell of selecting to carry out interval transmission is brought to the user of other small-cells k.As mentioned above, selected the quantity of the victim cell of carrying out the small-cell that interval sends can reflect its performance gain level brought to the user of other small-cells, therefore, can by G kbe set to this kth by the quantity N of the victim cell of small-cell selected k.In step s 302, due to small-cell #6 be first by the small-cell selected, and the quantity N of its victim cell 1be 3, the therefore horizontal G of performance gain that brings of small-cell #6 1=3.
Then, in step S303, upgrade described graph of a relation.Particularly, first from graph of a relation, the circle corresponding with the small-cell selected in step S301 and the arrow (namely pointing to or leave the arrow of this circle) that is associated with this circle is deleted.In addition, because the small-cell selected before will be closed, interference can not caused to this small-cell again in other small-cells, thus the quantity of the victim cell of other small-cells may change, therefore, also may need the quantity of the victim cell upgrading other small-cells, that is, will the quantity of the victim cell of the small-cell of interference be caused the small-cell selected in step s 302 to reduce 1.In the example depicted in fig. 4, the arrow deleted the circle corresponding with small-cell #6 and be associated with this circle from the graph of a relation shown in Fig. 4 (b), and the quantity of the victim cell of the small-cell #3 of interference small-cell #6 is updated to 1 from 2, thus obtains the graph of a relation shown in Fig. 4 (c).
Next, in step s 304, in remaining small-cell, select the small-cell that the quantity of victim cell is maximum, and determine whether it meets predetermined condition.If the small-cell that the quantity of selected victim cell is maximum meets predetermined condition, then this small-cell can be defined as the small-cell of carrying out interval transmission, then return step S303, and repeat step S303 and step afterwards.Otherwise if selected small-cell does not meet predetermined condition, then no longer select small-cell to carry out interval and send, that is, this selection operation terminates.An example of described predetermined condition can be that the performance gain level that the small-cell selected in step S304 is brought (is expressed as G k+1) the performance gain level brought of the small-cell that sends with previous selected carrying out interval (is expressed as G k) meet G k+1>0.5*G k.In this case, in the example depicted in fig. 4, the small-cell maximum due to victim cell quantity in residue small-cell is that small-cell #1(is see Fig. 4 (c)), therefore select this small-cell #1, then determine whether it meets above-mentioned predetermined condition.The performance gain level brought due to small-cell #1 is G 2=2, and the performance gain level that previous selected small-cell (the small-cell #6 step S302 selects) brings is G 1=3, and meet G 2>0.5*G 1, therefore small-cell #1 meets described predetermined condition, thus small-cell #1 is defined as the small-cell of carrying out interval transmission, as shown in the gray circles in Fig. 4 (d).Then, again perform step S303, be updated to the graph of a relation shown in Fig. 4 (e) by the graph of a relation shown in Fig. 4 (d), and again perform step S304, namely determine whether the small-cell that victim cell is maximum in remaining small-cell meets above-mentioned predetermined condition.Now, the small-cell maximum due to victim cell quantity in residue small-cell does not meet above-mentioned predetermined condition, and therefore this selection course terminates.Like this, by the way, the final small-cell #6 and small-cell #1 that selects is as the small-cell of carrying out interval transmission.
Will be appreciated that, in fact predetermined condition mentioned above can be any condition suitably set according to actual needs.Such as, except the example of above-mentioned predetermined condition, described predetermined condition also can be that the community of current selection is no more than default threshold value with the total quantity of the community selected before, or described predetermined condition is that the performance gain level that the small-cell selected in step S304 is brought (is expressed as G k+1) the performance gain level brought of the small-cell that sends with previous selected carrying out interval (is expressed as G k) meet G k+1>0.5*G k, and the performance gain level that this selected small-cell is brought itself is greater than default performance gain level thresholds.
In addition, it should be noted that, in above-mentioned selection course, if multiple small-cell has the quantity of equal victim cell, and this quantity is more than the quantity of the victim cell of other small-cells, then can select any one or more in them randomly, or it is one or more to select according to additional standard in them, such as, can selects in them according to the quantity of central user one or more.
For other small-cells in described multiple small-cell except at least one selected small-cell, can be set to normally send (that is, sending continuously or non-batch transmission).Particularly, if other small-cells are current be in normal transmission state, its state then can be kept constant to proceed normal transmission, if other small-cells are current be in interval transmission state, then its state can be changed into normal transmission state normally to send.
After have selected at least one small-cell of carrying out interval transmission, the information of at least one small-cell selected by instruction can be sent to Base Band Unit corresponding with at least one small-cell described in base station.Various ways can be used to send this message.Such as, the message of the transmission state of each small-cell of instruction can be sent to each BBU in BBU pond, within the message, the first value (such as 1) is set to by with by the transmission state index value of selecting to carry out the small-cell that sends of interval corresponding, and the transmission state index value corresponding with the small-cell of carrying out normally sending is set to the second value (such as 0), each BBU can be determined according to the transmission state index value in the message received, and whether the small-cell of its correspondence should carry out interval and send.Alternatively, can only to indicating its corresponding small-cell should carry out the message intermittently sent with being sent by the BBU selecting to carry out the small-cell that interval sends.In addition, similarly instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them.
Based on received message, and selected to carry out BBU corresponding to the small-cell that sends of interval and this small-cell can be indicated to carry out interval send, and the BBU corresponding with other small-cells can indicate these communities normally to send.
Utilize said method, at least one can be selected from described multiple small-cell to carry out the small-cell of interval transmission.The small-cell sent owing to carrying out interval selects the annoyance level of other small-cells according to this small-cell, therefore, carrying out interval and sending, significantly can reduce the interference between these small-cells by making selected small-cell.As described above, said method can be performed to each transmission interval, thus select suitable small-cell to carry out interval to send for each transmission interval.
(modification)
In the above-described first embodiment, for each small-cell in described multiple small-cell, use the quantity of the victim cell of this small-cell to represent the annoyance level of this small-cell to other small-cells.But, also can represent the annoyance level of this small-cell to other small-cells by the quantity of the edge customer of the victim cell of this small-cell, and select the small-cell of carrying out interval transmission according to the quantity of this edge customer.
Particularly, in this modification, in the step 201 shown in Fig. 2, obtain the quantity of the edge customer of the victim cell of each small-cell, as the interfere information of this small-cell, now, the interfere information of each small-cell is the value of the quantity of the edge customer of the victim cell representing this small-cell.
The quality of reception measurement report that can receive according to the user from each small-cell determines the quantity of the edge customer of the victim cell of each small-cell.Such as, in the example depicted in fig. 1, for small-cell 1, can the RSRP of its Serving cell be measured by each user of its all victim cell and it be disturbed to the RSRP of maximum small-cell, and measurement report is sent to base station (the corresponding BBU particularly, in base station).In a base station, such as in the BBU corresponding with this victim cell or in the controller of above-mentioned small-cell, the difference between these two RSRP can be calculated, and determine whether described difference is greater than predetermined threshold, this threshold value can need according to design and/or the actual conditions of mobile communications network are suitably arranged, and typically can be set to 6dB.If described difference is less than this threshold value, then this user is the edge customer of this victim cell, otherwise this user is the central user of this victim cell.Like this, the quantity of the edge customer of each victim cell of small-cell 1 can be determined, and additionally can determine the quantity of the central user of each victim cell of small-cell 1.Similarly, the quantity of the edge customer of each victim cell of small-cell 2 and small-cell 3 can be determined respectively, and additionally can determine the quantity of the central user of each victim cell of small-cell 2 and small-cell 3.Thus, the central user of each small-cell and the quantity of edge customer can be determined.Equally, described RSRP is exemplary, also can pass through other parameters (such as Reference Signal Received Quality RSRQ, Signal to Interference plus Noise Ratio SINR etc.) and carry out formula similarly and determine the quantity of the edge customer of each small-cell and the quantity of central user.It should be noted that, when small-cell does not have victim cell, can think that the quantity of edge customer of its victim cell is 0, and when small-cell has multiple victim cell, the quantity of the edge customer of its victim cell can be the quantity sum of the edge customer of all victim cell.
Then, in the step S202 shown in Fig. 2, the small-cell of carrying out interval transmission can be selected based on the quantity of the edge customer of the victim cell of each small-cell.
Particularly, the community that the quantity of the edge customer of victim cell can be selected maximum, as the small-cell of carrying out interval transmission.In this case, the quantity of the edge customer of the victim cell of each small-cell can be compared simply, and select small-cell that the quantity of the edge customer of victim cell is maximum as the small-cell of carrying out interval and sending.
Alternatively, several small-cells can be selected from described multiple small-cell, as the small-cell of carrying out interval transmission.This selection can be carried out with various ways.In the first way of example, the quantity of described multiple small-cell according to the edge customer of victim cell can be sorted, and from the small-cell that the quantity of the edge customer of victim cell is maximum, select several small-cells as the small-cell of carrying out interval transmission.In the second way of example, from described multiple small-cell, sequentially can select the quantity of the edge customer of victim cell at most and meet at least one small-cell of predetermined condition, as the small-cell of carrying out interval and sending.The quantity of the victim cell that this second way of example is only in the mode described with reference to Fig. 3 and Fig. 4 with the mode difference described with reference to Fig. 3 and Fig. 4 hereinbefore replaces with the quantity of the edge customer of victim cell, all the other operations are identical, therefore omit it here in order to avoid repetition and describe in detail.
The other guide of this process variant is identical with the method for above-mentioned first embodiment, here repeats no more.
Below, the equipment of the small-cell that interval sends is carried out in the selection from multiple small-cell described according to a first embodiment of the present invention with reference to Fig. 5.This equipment can be contained in the eNodeB shown in Fig. 1, and is operationally couple to each BBU in BBU pond, thus serves as above-mentioned small-cell controller.This equipment also can be positioned at other positions, such as, can be positioned at eNodeB outside, and the BBU pond be operationally couple in eNodeB in case with its exchange message.In addition, this equipment can perform the method described hereinbefore, and the operation performed due to this equipment is identical in fact with each step in the method described hereinbefore, therefore here only simply describes described equipment.
As shown in Figure 5, from multiple small-cell, the equipment 500 carrying out the small-cell that interval sends is selected to comprise information acquisition device 501 and cell selecting apparatus 502.
Information acquisition device 501 obtains the interfere information of each small-cell in described multiple small-cell, and wherein the interfere information of each small-cell represents the annoyance level of this small-cell to other small-cells in described multiple small-cell.For each small-cell, the quantity of the victim cell of this small-cell can be used to represent the annoyance level of this small-cell to other small-cells, that is, the interfere information of each small-cell can be the value of the quantity of the victim cell representing this small-cell.As described above, the quality of reception measurement report that can receive according to the user from each small-cell determines the quantity of the victim cell of each small-cell.Such as, can obtain the quantity of the victim cell of each small-cell according to the mode described with reference to Fig. 2 hereinbefore, thus obtain the interfere information of each small-cell, here in order to avoid repetition, the descriptions thereof are omitted.
The interfere information of each small-cell that cell selecting apparatus 502 obtains based on information acquisition device 501, selects the small-cell of carrying out interval transmission from described multiple small-cell.
Particularly, cell selecting apparatus 502 can select a small-cell with the value of maximum interfere information from described multiple small-cell, as the small-cell of carrying out interval transmission.In this case, cell selecting apparatus 502 can compare the quantity of the victim cell of each small-cell simply, and selects small-cell that the quantity of victim cell is maximum as the small-cell of carrying out interval and sending.
Alternatively, cell selecting apparatus 502 can select several small-cells from described multiple small-cell, as the small-cell of carrying out interval transmission.Cell selecting apparatus 502 can carry out this selection with various ways.In the first way of example, the quantity of described multiple small-cell according to victim cell can sort by cell selecting apparatus 502, and from the small-cell that the quantity of victim cell is maximum, select several small-cells as the small-cell of carrying out interval transmission.In the second way of example, cell selecting apparatus 502 sequentially can be selected the quantity of victim cell at most and meet at least one small-cell of predetermined condition, as the small-cell of carrying out interval transmission from described multiple small-cell.Cell selecting apparatus 502 can carry out this selection according to the mode that composition graphs 3 and Fig. 4 describe hereinbefore, omits it here describe in detail in order to avoid repetition.It should be noted that, in above-mentioned selection course, if multiple small-cell has the quantity of equal victim cell, and this quantity is more than the quantity of the victim cell of other small-cells, then can select any one or more in them randomly, or that can select in them according to additional standard is one or more, such as, can select in them according to the quantity of central user one or more.
For other small-cells in described multiple small-cell except at least one selected small-cell, cell selecting apparatus 502 can be set to normally to be sent (namely sending continuously).Particularly, if other small-cells are current be in normal transmission state, then cell selecting apparatus 502 can keep its state constant to proceed normal transmission, if other small-cells are current be in interval transmission state, then its state can be changed into normal transmission state normally to send by cell selecting apparatus 502.
After have selected at least one small-cell of carrying out interval transmission, the information of at least one small-cell selected by instruction can be sent to Base Band Unit corresponding with at least one small-cell described in base station according to one of various ways mentioned above by cell selecting apparatus 502.In addition, instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them by cell selecting apparatus 502.
Utilize the said equipment, at least one can be selected from described multiple small-cell to carry out the small-cell of interval transmission.This equipment can perform said method to each transmission interval, thus selects suitable small-cell to carry out interval to send for each transmission interval.
(modification)
Hereinbefore, for each small-cell in described multiple small-cell, use the quantity of the victim cell of this small-cell to represent the annoyance level of this small-cell to other small-cells.But, also can represent the annoyance level of this small-cell to other small-cells by the quantity of the edge customer of the victim cell of this small-cell.In this case, the interfere information of each small-cell is the value of the quantity of the edge customer of the victim cell representing this small-cell.
Particularly, information acquisition device 501 obtains the quantity of the edge customer of the victim cell of each small-cell, as the interfere information of this small-cell.As described above, the quality of reception measurement report that information acquisition device 501 can receive according to the user from each small-cell determines the quantity of the edge customer of the victim cell of each small-cell.Such as, information acquisition device 501 according to the mode described hereinbefore to obtain the quantity of the edge customer of the victim cell of each small-cell, can omit it here and describes in detail in order to avoid repetition.
The quantity of the edge customer of the victim cell of each small-cell that cell selecting apparatus 502 can obtain based on information acquisition device 501 selects the small-cell of carrying out interval transmission.Particularly, the community that cell selecting apparatus 502 can select the quantity of the edge customer of victim cell maximum, as the small-cell of carrying out interval transmission.Alternatively, cell selecting apparatus 502 can select several small-cells from described multiple small-cell, as the small-cell of carrying out interval transmission.Such as, the quantity of described multiple small-cell according to the edge customer of victim cell can sort by cell selecting apparatus 502, and from the small-cell that the quantity of the edge customer of victim cell is maximum, select several small-cells as the small-cell of carrying out interval transmission.Or cell selecting apparatus 502 sequentially can be selected the quantity of the edge customer of victim cell at most and meet at least one small-cell of predetermined condition, as the small-cell of carrying out interval transmission from described multiple small-cell.Cell selecting apparatus 502 can select small-cell according to mode mentioned above, here repeats no more.
The other guide of this modification equipment is identical with the equipment of above-mentioned first embodiment, here repeats no more.
(the second embodiment)
According to a first embodiment of the present invention and in the method and apparatus of modification, consider small-cell and carry out performance gain that interval sends to the user of other small-cells to bring to select small-cell.But, as described above, when small-cell carry out interval send time, particularly, when sending interval for certain and closing this small-cell, its user (especially central user) cannot send data in this transmission interval, thus generation data send delay, this user performance is declined.In order to balance between above-mentioned performance gain and hydraulic performance decline, propose the method and apparatus of selecting to carry out the community that interval sends from multiple community according to a second embodiment of the present invention.
Below, the method and apparatus of selecting to carry out the small-cell that interval sends from multiple small-cell is according to a second embodiment of the present invention described with reference to the accompanying drawings.Second embodiment and the first embodiment distinguish only be to select to carry out small-cell that interval sends according to different, for the sake of simplicity, omit the description of the details identical with the first embodiment to the second embodiment here.
Fig. 6 is the flow chart selecting the method for carrying out the small-cell that interval sends from multiple small-cell illustrated according to a second embodiment of the present invention.The method can perform by eNodeB as shown in Figure 1.Such as, can arrange in the eNodeB shown in Fig. 1 be operationally couple to BBU pond small-cell operation control to perform the method.
As shown in Figure 6, in step s 601, obtain the quantity of the interfere information of each small-cell in described multiple small-cell and the user of predefined type, wherein the interfere information of each small-cell represents the annoyance level of this small-cell to other small-cells in described multiple small-cell.
Identical with the first embodiment, the interfere information of each small-cell can represent the quantity of the victim cell of this small-cell, here describes in detail for avoiding repetition to omit it.
With the first embodiment unlike, in the present embodiment, also obtain the quantity of the user of the predefined type of each small-cell.The user of described predefined type can be the user of any type determined as required, such as need to guarantee due to small-cell carry out interval sends and the impact that causes its service quality is as far as possible little user's (such as there is the user of high priority), needs guarantee that carrying out interval due to small-cell sends and to try one's best little user etc. on the impact that its throughput or data send delay cause.Carry out interval transmission due to selected small-cell and the user of the above-mentioned predefined type to this small-cell is caused negative effect, therefore, can with the quantity of the user of the predefined type of selected small-cell represent carry out gap transmission due to this small-cell and the user of the predefined type caused hydraulic performance decline.In the present embodiment, the user of described predefined type can be central user, in this case, obtains the quantity of the central user of each community.The quality of reception measurement report that can receive according to the user from each community determines the quantity of each Cell Center User.Owing to having described the mode of the quantity of the central user determining each community when description the first embodiment, therefore here repeat no more.
Next, in step S602, based on the quantity of the interfere information of each community obtained in step S601 and the user of predefined type, from described multiple community, select to carry out the community that interval sends.
Particularly, first, the difference d=N-a corresponding with each small-cell × M can be calculated, wherein, N is the value (being the quantity of victim cell in the present embodiment) of the interfere information of this small-cell, and M is the quantity of the user of the predefined type of this small-cell, and a is regulation coefficient.This difference d reflects the performance of carrying out intermittently sending to whole communication system to bring in this small-cell and improves the standard.The value of regulation coefficient a can set according to actual needs neatly.Typically, a can be set to 0<a≤1.Such as, a can be set to 1, in this case, difference d corresponding to each small-cell is the difference of the quantity of the quantity of the victim cell of this small-cell and the central user of this small-cell.Alternatively, the quantity M due to the user of described predefined type is often greater than the quantity N of victim cell, therefore a can be set to 0.5 or be less than 1 other values, to reduce the weight of M, make the small-cell selected thus more reasonable.
Then, at least one small-cell of carrying out interval transmission can be selected based on difference d.Such as, from described multiple small-cell, the small-cell corresponding to maximum difference d is selected, as the small-cell of carrying out interval transmission.In this case, difference d corresponding to each small-cell can be compared simply, and select difference d maximum small-cell is as the little small-cell of carrying out interval transmission.Alternatively, can sequentially select to correspond to maximum difference d from described multiple small-cell and at least one small-cell meeting predetermined condition, as the small-cell of carrying out interval transmission.In this case, this selection can be carried out with various ways.In first kind of way, the size of described multiple small-cell according to difference d can be sorted, and from the small-cell that difference d is maximum, select at least one community as the community of carrying out interval transmission.In the second way, can sequentially select to correspond to maximum difference d from described multiple small-cell and at least one small-cell meeting predetermined condition, as the small-cell of carrying out interval transmission.This second way is distinguished with the second way described for the first embodiment hereinbefore and is only the quantity of the victim cell used in the second way described for the first embodiment to replace with above-mentioned difference d, all the other operations are identical, and therefore here in order to avoid repetition, the descriptions thereof are omitted.
For other small-cells in described multiple community except at least one selected small-cell, as described above, can be set to normally send (that is, sending continuously or non-batch transmission).In addition, after have selected at least one small-cell of carrying out interval transmission, one of various ways mentioned above can be used, the information of at least one small-cell selected by instruction is sent to Base Band Unit corresponding with at least one small-cell described in base station, and instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them.Based on received message, each BBU can control corresponding small-cell to carry out interval transmission or normally sends.
(modification)
In above-mentioned second embodiment, for each small-cell in described multiple small-cell, use the quantity of the victim cell of this small-cell to represent the annoyance level of this small-cell to other small-cells.But, also can represent the annoyance level of this small-cell to other small-cells by the quantity of the edge customer of the victim cell of this small-cell.
Particularly, in this modification, in the step 601 shown in Fig. 6, obtain the quantity of the edge customer of the victim cell of each small-cell, as the interfere information of this small-cell, that is, the interfere information of each small-cell is the value of the quantity of the edge customer of the victim cell representing this small-cell, in addition, the quantity of the user of the predefined type of each small-cell is also obtained.The obtain manner of above-mentioned quantity, with identical with the mode that the second embodiment describes with reference to the first embodiment hereinbefore, here repeats no more.
Then, in the step S602 shown in Fig. 6, can select to carry out based on the number of the user of the quantity of the edge customer of the victim cell of each small-cell and predefined type the small-cell that interval sends.
In this case, first, the difference d=N '-a × M corresponding with each small-cell can be calculated, wherein, N ' is the value (being the quantity of the edge customer of victim cell in this modification) of the interfere information of this small-cell, and M is the quantity of the user of the predefined type of this small-cell, and a is regulation coefficient.Equally, typically, a can be set to 0<a≤1.Such as, a can be set to 1 or 0.5.
Then, at least one small-cell of carrying out interval transmission can be selected based on difference d.Such as, the community corresponding to maximum difference d can be selected from described multiple community, as the community of carrying out interval transmission.Alternatively, can sequentially select to correspond to maximum difference d from described multiple small-cell and at least one small-cell meeting predetermined condition, as the small-cell of carrying out interval transmission.This selection operation is identical with the mode described for Fig. 6 hereinbefore, omits it here and describes in detail.
The other guide of this process variant is identical with the method for above-mentioned second embodiment, here repeats no more.
The equipment of selecting to carry out the small-cell that interval sends from multiple small-cell according to a second embodiment of the present invention will be described below.This equipment can be contained in the eNodeB shown in Fig. 1, and is operationally couple to each BBU in BBU pond, thus serves as above-mentioned small-cell controller.This equipment also can be positioned at other positions, such as, can be positioned at eNodeB outside, and the BBU pond be operationally couple in eNodeB in case with its exchange message.In addition, this equipment can perform the method according to a second embodiment of the present invention described hereinbefore, the operation performed due to this equipment is identical in fact with each step in the method according to a second embodiment of the present invention described hereinbefore, therefore here only simply describes described equipment.
As shown in Figure 7, from multiple small-cell, the equipment 700 carrying out the small-cell that interval sends is selected to comprise information acquisition device 701 and cell selecting apparatus 702.
Information acquisition device 701 obtains the quantity of the interfere information of each small-cell in described multiple small-cell and the user of predefined type, and wherein the interfere information of each small-cell represents the annoyance level of this small-cell to other small-cells in described multiple small-cell.Equally, for each small-cell, the quantity of the victim cell of this small-cell can be used to represent the annoyance level of this small-cell to other small-cells, that is, the interfere information of each small-cell can be the value of the quantity of the victim cell representing this small-cell.Can according to mode mentioned above, the quality of reception measurement report received according to the user from each small-cell determines the quantity of the victim cell of each small-cell.In addition, the quantity of the user of described predefined type can be determined according to mode mentioned above.In the present embodiment, the user of described predefined type can be central user.
The quantity of the interfere information of each small-cell that cell selecting apparatus 702 obtains based on information acquisition device 701 and the user of predefined type, selects to carry out the small-cell that interval sends from described multiple small-cell.
Particularly, first cell selecting apparatus 702 can calculate the difference d=N-a corresponding with each small-cell × M, and wherein, N is the value (being the quantity of victim cell in the present embodiment) of the interfere information of this small-cell, M is the quantity of the user of the predefined type of this small-cell, and a is regulation coefficient.The value of regulation coefficient a can set according to actual needs neatly.Typically, a can be set to 0<a≤1.Such as, a can be set to 1 or 0.5.Then, cell selecting apparatus 702 can select at least one small-cell of carrying out interval transmission based on difference d.Such as, cell selecting apparatus 702 can select the small-cell corresponding to maximum difference d from described multiple small-cell, as the small-cell of carrying out interval transmission.Alternatively, cell selecting apparatus 702 can sequentially be selected to correspond to maximum difference d and at least one small-cell meeting predetermined condition, as the small-cell of carrying out interval transmission from described multiple small-cell.
For other small-cells in described multiple small-cell except at least one selected small-cell, as described above, cell selecting apparatus 702 can be set to normally send (that is, sending continuously or non-batch transmission).In addition, after have selected at least one small-cell of carrying out interval transmission, cell selecting apparatus 702 can use one of various ways mentioned above, the information of at least one small-cell selected by instruction is sent to Base Band Unit corresponding with at least one small-cell described in base station, and instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them.Based on received message, each BBU can control corresponding small-cell to carry out interval transmission or normally sends.
In the second embodiment of the present invention, when selecting the small-cell of carrying out interval transmission, consider the performance loss that the user of performance gain and this small-cell oneself intermittently sending to the user of other small-cells to bring is carried out in this small-cell simultaneously, the interval of selected small-cell is made to send the interference that can significantly reduce between community, avoid its user performance to be a greater impact simultaneously, thus improve the performance of whole communication system.
(modification)
In the said equipment 700, for each small-cell in described multiple small-cell, use the quantity of the victim cell of this small-cell to represent the annoyance level of this small-cell to other small-cells.But, also can represent the annoyance level of this small-cell to other small-cells by the quantity of the edge customer of the victim cell of this small-cell.In this case, the interfere information of each small-cell is the value of the quantity of the edge customer of the victim cell representing this small-cell.
Particularly, information acquisition device 701 obtains the quantity of the edge customer of the victim cell of each small-cell, as the interfere information of this small-cell.In addition, information acquisition device 701 also obtains the quantity of the user of the predefined type of each small-cell.
The quantity of edge customer of victim cell of each small-cell that cell selecting apparatus 702 can obtain based on information acquisition device 701 and the quantity of the user of predefined type select the small-cell of carrying out interval transmission.
In this case, first, cell selecting apparatus 702 can calculate the difference d=N '-a × M corresponding with each small-cell, wherein, N ' is the value (being the quantity of the edge customer of victim cell in this modification) of the interfere information of this small-cell, M is the quantity of the user of the predefined type of this small-cell, and a is regulation coefficient.Equally, typically, a can be set to 0<a≤1.Such as, a can be set to 1 or 0.5.
Then, cell selecting apparatus 702 can select at least one small-cell of carrying out interval transmission based on difference d.Such as, cell selecting apparatus 702 can select the small-cell corresponding to maximum difference d from described multiple small-cell, as the community of carrying out interval transmission.Alternatively, cell selecting apparatus 702 can sequentially be selected to correspond to maximum difference d and at least one small-cell meeting predetermined condition, as the small-cell of carrying out interval transmission from described multiple small-cell.This selection operation is identical with the mode described for Fig. 6 hereinbefore, omits it here and describes in detail.
The other guide of this modification equipment is identical with the equipment of above-mentioned second embodiment, here repeats no more.
(the 3rd embodiment)
In the third embodiment of the present invention, only can select the small-cell of carrying out interval transmission based on the quantity of the user of the predefined type of each small-cell.
Below, the method and apparatus of selecting to carry out the small-cell that interval sends from multiple small-cell is according to a third embodiment of the present invention described with reference to the accompanying drawings.3rd embodiment and the first and second embodiments distinguish only be to select to carry out small-cell that interval sends according to different, here, for the sake of simplicity, will the description of omission to the details identical with the first and second embodiments of the 3rd embodiment.
Fig. 8 is the flow chart selecting the method for carrying out the small-cell that interval sends from multiple small-cell illustrated according to a third embodiment of the present invention.The method can perform by eNodeB as shown in Figure 1.Such as, can arrange in the eNodeB shown in Fig. 1 be operationally couple to BBU pond small-cell operation control to perform the method.
As shown in Figure 8, in step S801, obtain the quantity of the user of the predefined type of each small-cell in described multiple small-cell.The user of described predefined type can be the user of any type determined as required, such as need to guarantee due to small-cell carry out interval sends and the impact that causes its service quality is as far as possible little user, needs guarantee that carrying out interval due to small-cell sends and to try one's best little user etc. on the impact that its throughput or data send delay cause.In the present embodiment, the user of described predefined type can be central user.
Next, in step S802, based on the quantity of the user of the predefined type of each community obtained in step S801, from described multiple community, select the community of carrying out interval transmission.
Particularly, a small-cell of the minimum number of the user of predefined type can be selected from described multiple small-cell, as the small-cell of carrying out interval transmission.Alternatively, from described multiple small-cell, sequentially can select at least one small-cell of the minimum number of the user of predefined type, as the small-cell of carrying out interval transmission.Similarly can carry out this selection operation in step S802 according to each mode described with reference to Fig. 2 hereinbefore, omit it here in order to avoid repetition and describe in detail.
For other small-cells in described multiple small-cell except at least one selected small-cell, as described above, can be set to normally send (that is, sending continuously or non-batch transmission).In addition, after have selected at least one small-cell of carrying out interval transmission, one of various ways mentioned above can be used, the information of at least one small-cell selected by instruction is sent to Base Band Unit corresponding with at least one small-cell described in base station, and instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them.Based on received message, each BBU can control corresponding small-cell to carry out interval transmission or normally sends.
The equipment of selecting to carry out the small-cell that interval sends from multiple small-cell according to a third embodiment of the present invention will be described below.This equipment can be contained in the eNodeB shown in Fig. 1, and is operationally couple to each BBU in BBU pond, thus serves as above-mentioned small-cell controller.This equipment also can be positioned at other positions, such as, can be positioned at eNodeB outside, and the BBU pond be operationally couple in eNodeB in case with its exchange message.In addition, this equipment can perform the method according to a third embodiment of the present invention described hereinbefore,
As shown in Figure 9, from multiple small-cell, the equipment 900 carrying out the small-cell that interval sends is selected to comprise information acquisition device 901 and cell selecting apparatus 902.
Information acquisition device 901 obtains the quantity of the user of the predefined type of each small-cell in described multiple small-cell.The user of described predefined type can be the user of any type determined as required, such as need to guarantee due to small-cell carry out interval sends and the impact that causes its service quality is as far as possible little user, needs guarantee that carrying out interval due to small-cell sends and to try one's best little user etc. on the impact that its throughput or data send delay cause.In the present embodiment, the user of described predefined type can be central user.
The quantity of the user of the predefined type of each community that cell selecting apparatus 902 obtains based on information acquisition device 901, selects the community of carrying out interval transmission from described multiple community.
Particularly, cell selecting apparatus 902 can select a small-cell of the minimum number of the user of predefined type from described multiple small-cell, as the small-cell of carrying out interval transmission.Alternatively, cell selecting apparatus 902 can sequentially be selected the minimum number of the user of predefined type and meet at least one small-cell of predetermined condition from described multiple small-cell, as the small-cell of carrying out interval transmission.Cell selecting apparatus 902 can similarly carry out this selection operation according to each mode described with reference to Fig. 2 hereinbefore, omits it here describe in detail in order to avoid repetition.
For other small-cells in described multiple small-cell except at least one selected small-cell, as described above, cell selecting apparatus 902 can be set to normally send (that is, sending continuously or non-batch transmission).In addition, after have selected at least one small-cell of carrying out interval transmission, cell selecting apparatus 902 can use one of various ways mentioned above, the information of at least one small-cell selected by instruction is sent to Base Band Unit corresponding with at least one small-cell described in base station, and instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them.Based on received message, each BBU can control corresponding small-cell to carry out interval transmission or normally sends.
Like this, utilize method and apparatus according to a third embodiment of the present invention, also can select suitable small-cell to carry out interval to send, thus reduce the interference between small-cell, and avoid the performance of whole communication system to be subject to significant negative effect.
In the first embodiment of the present invention in the 3rd embodiment and modification thereof, following situation may be there is: certain or some small-cells are selected to carry out interval too continually and sent when selecting the small-cell of carrying out interval transmission, make to be sent significant delays by the data of the user of the community selected, thus selected small-cell performance is significantly worsened.In order to avoid this situation, the history interval transmission frequency of each community can also be obtained further (namely, number of times or the time of interval transmission is carried out in the past in scheduled time slot), and select the small-cell of carrying out interval transmission based on this history interval transmission frequency.Particularly, have selected the small-cell of carrying out interval transmission utilizing method and apparatus mentioned above and modification thereof after, can determine whether the history interval transmission frequency of selected small-cell exceedes predetermined threshold further.If, then can abandon current small-cell selection result, namely, do not make the small-cell of current selection carry out interval to send, but utilize said method and equipment and modification thereof from described multiple small-cell except when reselect the small-cell of carrying out interval and sending in other small-cells beyond the small-cell of front selection, until the history interval transmission frequency of selected small-cell is no more than predetermined threshold.In this case, will be finally that history interval transmission frequency is no more than the small-cell of predetermined threshold by selecting to carry out the small-cell that interval sends.
(the 4th embodiment)
In the fourth embodiment of the present invention, only the small-cell of carrying out interval transmission can be selected based on the history interval transmission frequency of each small-cell.
Below, the method and apparatus of selecting to carry out the small-cell that interval sends from multiple small-cell is according to a fourth embodiment of the present invention described with reference to the accompanying drawings.4th embodiment and first, second, and third embodiment distinguish only be to select to carry out small-cell that interval sends according to different, here, for the sake of simplicity, will the description of omission to the details identical with first, second, and third embodiment of the 4th embodiment.
Figure 10 is the flow chart selecting the method for carrying out the small-cell that interval sends from multiple small-cell illustrated according to a fourth embodiment of the present invention.The method can perform by eNodeB as shown in Figure 1.Such as, can arrange in the eNodeB shown in Fig. 1 be operationally couple to BBU pond small-cell operation control to perform the method.
As shown in Figure 10, in step S1001, obtain the history interval transmission frequency of each small-cell in described multiple small-cell.Described history interval transmission frequency such as can carry out with scheduled time slot Nei Gai community in the past number of times that interval sends or the time represents.
Next, in step S1002, based on the history interval transmission frequency of each community obtained in step S1001, from described multiple community, select the community of carrying out interval transmission.
Particularly, the small-cell that history interval transmission frequency is minimum can be selected from described multiple small-cell, as the small-cell of carrying out interval transmission.Alternatively, from described multiple small-cell, at least one small-cell that history interval transmission frequency is minimum can sequentially be selected, as the small-cell of carrying out interval transmission.Similarly can carry out this selection operation in step S802 according to each mode described with reference to Fig. 2 hereinbefore, omit it here in order to avoid repetition and describe in detail.
For other small-cells in described multiple small-cell except at least one selected small-cell, as described above, can be set to normally send (that is, sending continuously or non-batch transmission).In addition, after have selected at least one small-cell of carrying out interval transmission, one of various ways mentioned above can be used, the information of at least one small-cell selected by instruction is sent to Base Band Unit corresponding with at least one small-cell described in base station, and instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them.Based on received message, each BBU can control corresponding small-cell to carry out interval transmission or normally sends.
The equipment of selecting to carry out the small-cell that interval sends from multiple small-cell according to a fourth embodiment of the present invention will be described below.This equipment can be contained in the eNodeB shown in Fig. 1, and is operationally couple to each BBU in BBU pond, thus serves as above-mentioned small-cell controller.This equipment also can be positioned at other positions, such as, can be positioned at eNodeB outside, and the BBU pond be operationally couple in eNodeB in case with its exchange message.In addition, this equipment can perform the method according to a fourth embodiment of the present invention described hereinbefore,
As shown in figure 11, from multiple small-cell, the equipment 1100 carrying out the small-cell that interval sends is selected to comprise information acquisition device 1101 and cell selecting apparatus 1102.
Information acquisition device 1101 obtains the history interval transmission frequency of each small-cell in described multiple small-cell.
Cell selecting apparatus 1102, based on the history interval transmission frequency of each community obtained at information acquisition device 1101, selects the community of carrying out interval transmission from described multiple community.
Particularly, cell selecting apparatus 902 can select the small-cell that history interval transmission frequency is minimum from described multiple small-cell, as the small-cell of carrying out interval transmission.Alternatively, cell selecting apparatus 902 sequentially can select at least one small-cell that history interval transmission frequency is minimum from described multiple small-cell, as the small-cell of carrying out interval transmission.Cell selecting apparatus 902 can similarly carry out this selection operation according to each mode described with reference to Fig. 2 hereinbefore, omits it here describe in detail in order to avoid repetition.
For other small-cells in described multiple small-cell except at least one selected small-cell, as described above, cell selecting apparatus 902 can be set to normally send (that is, sending continuously or non-batch transmission).In addition, after have selected at least one small-cell of carrying out interval transmission, cell selecting apparatus 902 can use one of various ways mentioned above, the information of at least one small-cell selected by instruction is sent to Base Band Unit corresponding with at least one small-cell described in base station, and instruction should can be maintained or change the message informing of the transmission state of other small-cells to the BBU corresponding with them.Based on received message, each BBU can control corresponding small-cell to carry out interval transmission or normally sends.
Like this, utilize method and apparatus according to a fourth embodiment of the present invention, the community of carrying out interval transmission can be selected for each transmission interval, avoid certain or some communities to be selected too continually to carry out interval to send simultaneously, thus prevent its performance from significantly worsening.
Be described above the method and apparatus of selecting to carry out the community that interval sends from multiple community according to the embodiment of the present invention.It should be noted that these descriptions are just illustrative, and nonrestrictive, and those skilled in the art can carry out various amendment to it, and do not deviate from scope of the present invention.Such as, although hereinbefore, under the framework of C-RAN, describe embodiments of the invention, the present invention is not limited thereto, but any other framework being different from C-RAN framework can be applied to.In addition, as described above, the present invention also can be applied to the community of the other types except small-cell.
Although illustrate and described example embodiment of the present invention, those skilled in the art are to be understood that, when not deviating from the scope and spirit of the present invention limited in claim and equivalent thereof, the change in various forms and details can be made to these example embodiment.

Claims (14)

1. from multiple community, select a method of carrying out the community that interval sends, comprising:
Obtain at least one in the interfere information of each community in described multiple community, the quantity of user of predefined type of described each community and the history interval transmission frequency of described each community, wherein the interfere information of each community represents the annoyance level of this community to other communities in described multiple community; And
Based at least one in the quantity of the interfere information of each community, the user of predefined type and history interval transmission frequency, the community selecting at least one to carry out interval from described multiple community to send.
2. the method for claim 1, wherein, the interfere information of each community is the value of the quantity of the edge customer of the quantity of the victim cell representing this community or the victim cell of this community, described victim cell refers to the community being subject to the interference of this community in described multiple community, and wherein, when the interfere information based on each community selects at least one to carry out the community of interval transmission from described multiple community:
From described multiple community, sequentially select to have the value of maximum interfere information and meet at least one community of predetermined condition, as the community of carrying out interval and sending.
3. the method for claim 1, wherein, the interfere information of each community is the value of the quantity of the edge customer of the quantity of the victim cell representing this community or the victim cell of this community, described victim cell refers to the community being subject to the interference of this community in described multiple community, and wherein, in the quantity based on the interfere information of each community and the user of described predefined type, when selecting at least one to carry out the community of interval transmission from described multiple community:
Calculate the difference d=N-a × M corresponding with each community, wherein, the value of the interfere information of N Shi Gai community, the quantity of the user of the predefined type of M Shi Gai community, a is regulation coefficient; And
Sequentially select to correspond to maximum difference d and at least one community meeting predetermined condition, as the community of carrying out interval transmission from described multiple community.
4. the method for claim 1, wherein when the quantity of the user of the predefined type based on each community selects the community of carrying out interval transmission from described multiple community:
The community of the minimum number of the user of predefined type is selected, as the community of carrying out interval transmission from described multiple community.
5. the method as described in any one in claim 2 to 4, wherein, selected community is the community that history interval transmission frequency is no more than predetermined threshold.
6. the method for claim 1, wherein in the history interval transmission frequency based on each community, when selecting at least one to carry out the community of interval transmission from described multiple community:
At least one community with minimum history interval transmission frequency is sequentially selected, as the community of carrying out interval transmission from described multiple community.
7. the method as described in any one in claim 1 to 6, wherein, described method performs in the base station of centralized Radio Access Network, and at least one selected by instruction is carried out the information of community that interval sends and be sent to the Base Band Unit corresponding with at least one community described in described base station.
8. from multiple community, select the equipment carrying out the community that interval sends, comprising:
Information acquisition device, be configured to obtain at least one in the interfere information of each community in described multiple community, the quantity of user of the predefined type of described each community and the history interval transmission frequency of described each community, wherein the interfere information of each community represents the annoyance level of this community to other communities in described multiple community; And
Cell selecting apparatus, is configured to based at least one in the quantity of the interfere information of each community, the user of predefined type and history interval transmission frequency, the community selecting at least one to carry out interval from described multiple community to send.
9. equipment as claimed in claim 8, wherein, the interfere information of each community is the value of the quantity of the edge customer of the quantity of the victim cell representing this community or the victim cell of this community, and described victim cell refers to the community being subject to the interference of this community in described multiple community, and wherein
When the interfere information based on each community selects at least one to carry out the community of interval transmission from described multiple community, described cell selecting apparatus is sequentially selected to have the value of maximum interfere information and is met at least one community of predetermined condition from described multiple community, as the community of carrying out interval and sending.
10. equipment as claimed in claim 8, wherein, the interfere information of each community is the value of the quantity of the edge customer of the quantity of the victim cell representing this community or the victim cell of this community, and described victim cell refers to the community being subject to the interference of this community in described multiple community, and wherein
In the quantity based on the interfere information of each community and the user of described predefined type, when selecting at least one to carry out the community of interval transmission from described multiple community, described cell selecting apparatus calculates the difference d=N-a × M corresponding with each community, and sequentially select to correspond to maximum difference d and at least one community meeting predetermined condition from described multiple community, as the community of carrying out interval transmission, wherein, the value of the interfere information of N Shi Gai community, the quantity of the user of the predefined type of M Shi Gai community, a is regulation coefficient.
11. equipment as claimed in claim 8, wherein, when the quantity of the user of the predefined type based on each community selects the community of carrying out interval transmission from described multiple community, described cell selecting apparatus selects the community of the minimum number of the user of predefined type from described multiple community, as the community of carrying out interval transmission.
12. equipment as described in any one in claim 9 to 11, wherein, the community that described cell selecting apparatus is selected is the community that history interval transmission frequency is no more than predetermined threshold.
13. equipment as claimed in claim 8, wherein, in the history interval transmission frequency based on each community, when selecting at least one to carry out the community of interval transmission from described multiple community, described cell selecting apparatus sequentially selects at least one community with minimum history interval transmission frequency from described multiple community, as the community of carrying out interval transmission.
14. equipment as described in any one in claim 8 to 13, wherein, described equipment is comprised in the base station of centralized Radio Access Network, and at least one selected by instruction is carried out the information of community that interval sends by described cell selecting apparatus sends to the Base Band Unit corresponding with at least one community described in described base station.
CN201310454545.5A 2013-09-29 2013-09-29 Method and apparatus for selecting cells from plurality of cells to perform intermittent transmission Pending CN104519578A (en)

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