CN101394647A - Method and system for realizing cell networking - Google Patents
Method and system for realizing cell networking Download PDFInfo
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- CN101394647A CN101394647A CN 200710122184 CN200710122184A CN101394647A CN 101394647 A CN101394647 A CN 101394647A CN 200710122184 CN200710122184 CN 200710122184 CN 200710122184 A CN200710122184 A CN 200710122184A CN 101394647 A CN101394647 A CN 101394647A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
Abstract
The invention discloses a method for cell-networking, which is used for realizing the flexible planning of a cell and the cell networking in various forms, and improving the availability of a frequency spectrum or saving network resources. The method comprises cell split and cell merge. The cell split method and the cell merge method comprise cell establishment and cell deletion. The cell split method comprises the following steps: calculating the occupation situations of physical resources on a plurality of antennae corresponding to the same cell; determining the physical resources occupied being not less than the prearranged threshold value continually within the prearranged time, and determining to carry out the cell split when reaching the prearranged time; splitting the same cell into at least two cells; and respectively allocating the antennae to the two cells. The cell merge method is similar to the cell split method. The invention further discloses a device, a distributed type base station and an internal unit thereof for planning a cell.
Description
Technical field
The present invention relates to the communications field, particularly relate to the method and system that realize cell networking.
Background technology
A common antenna or the corresponding sub-district of smart antenna that comprises a plurality of antenna elements in the present prior art.Along with developing rapidly of communication user and communication service, existing local resource can not satisfy the demands, and for communication system is carried out dilatation, a kind of mode is the quantity that increases antenna, to increase local resource, another kind of mode is that multiple signals are merged into one road signal.
In traditional base station system, what transmit between base band and transceiver is analog signal.Can directly superpose by transmission line, and send to the base band side and handle analog signal.But in the process of transmitting of analog signal, along with the increase of transmission range, analog signal is decay constantly.In the long-distance transmissions process that realizes analog signal, usually use trunking (as the dried station of putting) that analog signal is carried out processing and amplifying, the realization non-blind area covers, but, in amplified analog signal, also amplified noise signal, generation has a strong impact on to signal quality, and has bigger power consumption, and there is the not shortcoming of easy care in trunking.
At present, occur a kind of radio frequency remote technology in the prior art, the radio frequency unit in the base station is zoomed out, place near the antenna.In this way, realized that a Base Band Unit (BBU) can connect a plurality of Remote Radio Unit (RRU), and owing to be subjected to the restriction of existing hardware level, the base band demodulating of BBU can only support to be no more than many antennas of designed capacity, for example a BBU supports 6 subcarriers (representing with C), 8 antennas (representing with A) at most, then supports 48 road signals at most.Because there are some defectives in analog signal, then consider to realize that by the mode that increases antenna amount non-blind area covers, and the disposal ability of a BBU is limited, so this just needs to increase the dilatation that BBU realizes communication system.Yet the cost of BBU brings pressure than higher to dilatation work.And, all need artificial antenna and the corresponding RRU of setting up during each dilatation communication system, may further need set up BBU, this mode takies more human resources.If just build more antenna and sub-district, then cause the waste of telecommunication system resources at the networking initial stage.
As seen, prior art is in order to satisfy the demand of communication service development, and a kind of mode is to support more semaphore by the mode of superposed simulation signal, covers to realize non-blind area, but this mode exists transmission range shorter, is subjected to noise signal to disturb bigger problem.Another kind of mode is by the continuous dilatation communication system of artificial mode, but needs more human resources.Another mode is just to build more antenna and sub-district at the networking initial stage, but causes the waste of telecommunication system resources.
Summary of the invention
The embodiment of the invention provides a kind of method and system that realize cell networking, is used to realize the flexible planning of sub-district and the cell networking of various ways, improves the availability of frequency spectrum or saves Internet resources.
A kind of sub-district delet method of distributed base station may further comprise the steps:
Delete in the many antennas of corresponding same sub-district common signal channel and dedicated channel at least one antenna;
The state of sub-district on the described at least one antenna and common signal channel is changed to do not exist;
Remove the Radio Link on the described at least one antenna.
A kind of cell splitting method may further comprise the steps:
The physical resource of adding up on the many antennas of corresponding same sub-district takies situation;
Determine that the physical resource that has taken continues to be not less than preset threshold value in the default time, and when reaching default time, determine to carry out cell splitting;
Described same cell splitting is at least two sub-districts, and described many antennas are configured to described at least two sub-districts respectively.
A kind of sub-district merging method may further comprise the steps:
The physical resource of adding up in each sub-district takies situation;
At least two sub-districts of definite existence, for each sub-district at least two sub-districts, the physical resource that has taken in the default time continues to be not more than preset threshold value, and determines to carry out the sub-district when all reaching default time at least in described two sub-districts and merge;
A sub-district is merged in described at least two sub-districts, is a described sub-district with many antenna configurations of former described at least two sub-districts of correspondence.
A kind of device that is used to plan cell networking comprises:
Statistic unit, the physical resource that is used to add up on the many antennas of corresponding same sub-district takies situation;
Control unit is used to determine that the physical resource that has taken continues to be not less than preset threshold value in the default time, and determines to carry out cell splitting when reaching default time;
Dispensing unit is used for described same cell splitting is at least two sub-districts, and described many antennas is configured to described at least two sub-districts respectively.
A kind of RRU comprises:
External interface unit is used for receiving and sending message;
Radio frequency unit is used to connect many antennas, and receives from the radiofrequency signal of many antennas and to many antenna transmission radiofrequency signals;
Dispensing unit is used for setting up the described many antenna configurations that request message will connect according to the sub-district that receives and is at least one sub-district, and according to the sub-district deletion request message that receives, and the local resource at least one antenna in the described many antennas is deleted.
A kind of distributed base station comprises:
Antenna is used for receiving and the launching simulation radiofrequency signal;
Radio frequency remote unit RRU, be connected with many antennas, be used for setting up request message at least one sub-district of many antenna configurations for connecting according to the sub-district that receives, and according to the sub-district deletion request message that receives, with the deletion of the local resource at least one antenna in the many antennas under the same sub-district;
Base Band Unit BBU is used to handle the digital signal from RRU.
A kind of distributed base station comprises:
Antenna is used for receiving and the launching simulation radiofrequency signal;
A plurality of RRU, being respectively applied for and setting up request message according to the sub-district that receives is a locally-attached antenna configurations local resource, and according to the sub-district deletion request message that receives, the local resource on the locally-attached antenna is deleted; Wherein, the many antenna configurations of described a plurality of RRU have identical local resource;
BBU is used for the digital signal from RRU is handled.
A kind of distributed base station comprises:
Antenna is used for receiving and the launching simulation radiofrequency signal;
Radio frequency remote unit RRU, be connected with many antennas, send after being used for the analog radio-frequency signal from many antennas is converted to digital signal, wherein, the corresponding same sub-district of described many antennas, or each the part antenna in the described many antennas corresponds to different sub-districts respectively;
Base Band Unit BBU is used to handle the digital signal from RRU.
A kind of distributed base station comprises:
Antenna is used for receiving and the launching simulation radiofrequency signal;
A plurality of RRU, each RRU comprise an antenna, send after being used for the analog radio-frequency signal from antenna is converted to digital signal; Wherein, the corresponding same sub-district of the many antennas of described a plurality of RRU;
BBU is used for the digital signal from RRU is handled.
The embodiment of the invention provides the method for plot planning, comprise that sub-district deletion, cell splitting and sub-district merge, realized the flexible networking of sub-district, can carry out dynamic plot planning and networking, saved human resources or improved communication transmission quality according to actual environment.And the embodiment of the invention provides the device that is used to plan the sub-district and distributed base station etc., has realized cell networking flexibly.
Description of drawings
Figure 1A-Fig. 8 is the structure chart of distributed base station in the embodiment of the invention;
Fig. 9 is the main method flow chart that the sub-district is set up in the embodiment of the invention;
Figure 10 is the method flow diagram that the sub-district was set up when RNC initiation sub-district was set up in the embodiment of the invention;
Figure 11 is the method flow diagram that the sub-district was set up when OMC initiation sub-district was set up in the embodiment of the invention;
Figure 12 is the method flow diagram that the sub-district was set up when evolution base station initiation sub-district was set up in the embodiment of the invention;
Figure 13 is the main method flow chart of sub-district deletion in the embodiment of the invention;
Figure 14 is the concrete grammar flow chart of sub-district deletion in the embodiment of the invention;
Figure 15 is the main method flow chart of cell splitting in the embodiment of the invention;
Figure 16 A is the concrete grammar flow chart that carries out cell splitting in the embodiment of the invention according to transmitting power;
Figure 16 B is the concrete grammar flow chart that carries out cell splitting in the embodiment of the invention according to code channel resource;
Figure 17 is the method flow diagram that the sub-district merges in the embodiment of the invention;
Figure 18 is the basic block diagram of RRU in the embodiment of the invention;
Figure 19 is the detailed structure view of RRU in the embodiment of the invention;
Figure 20 is the structure chart of plot planning unit in the embodiment of the invention;
Figure 21 is the structure chart of RNC in the embodiment of the invention.
Embodiment
The embodiment of the invention makes the corresponding sub-district of many antennas according to the environment of reality, to save local resource, perhaps makes the corresponding a plurality of sub-districts of many antennas, to satisfy the demand of communication service or communication user.
Local resource in the embodiment of the invention comprises local district identification, training sequence and physical resource etc., and physical resource comprises transmitting power and code channel resource etc.
Distributed base station in the embodiment of the invention (abbreviation base station) comprises universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS) base station under (Node B) and Long Term Evolution (Long Time Evolution, LTE) evolution base station under the system (Evolved NodeB).Antenna in the embodiment of the invention comprises common antenna, have the smart antenna of a plurality of antenna elements and non intelligent antenna (as poliarizing antenna) etc.In the present embodiment antenna is defined as a passage, the RRU that connects many antennas is multichannel RRU, and the RRU that connects single antenna is single channel RRU.
Distributed base station in the embodiment of the invention (abbreviation base station) comprises antenna, BBU and the RRU (comprising multichannel RRU and single channel RRU) etc. that are used to receive and send analog radio-frequency signal.Distributed base station can comprise a plurality of RRU, and a plurality of RRU can be parallel connection, series connection or series-parallel connection relation.Described series-parallel connection relation is meant: a plurality of RRU that constitute series relationship constitute relation in parallel with other one or more RRU, and all RRU in these series relationship and the relation in parallel constitute the series-parallel connection relation jointly.Can initiate in the embodiment of the invention sub-district is set up and delete the sub-district equipment comprise radio network controller (Radio NetworkControl ler, RNC), (the Operation ﹠amp of operation maintenance center; Maintenance Center, OMC) and evolution base station etc.
BBU in the distributed base station is used for the processing of baseband digital signal.When carrying out the planning of cell networking by RNC or OMC, BBU also is used to transmit the sub-district that RNC or OMC send and sets up request message and sub-district deletion request message.When carrying out the planning of cell networking by evolution base station, distributed base station comprises plot planning unit 101, shown in Figure 1A, this plot planning unit 101 is used to plan the sub-district, determine the foundation of sub-district and deletion etc., generate and send the sub-district and set up request message and sub-district deletion request message, can directly send to RRU, perhaps be transmitted to RRU through BBU.This plot planning unit 101 also can belong to BBU, is equivalent to be undertaken by BBU the planning of cell networking.Wherein, BBU can constitute the BBU resource pool for a plurality of, provides service for the RRU that connects jointly.
Send after the analog radio-frequency signal that the many antennas that RRU is used for connecting receive is converted to digital signal, and the digital signal of receiving is converted to behind the analog radio-frequency signal by many antenna transmission, these many antennas are sub-district of correspondence at least.RRU also is used for setting up request message at least one sub-district of many antenna configurations for connecting according to the sub-district that receives, and according to the sub-district deletion request message that receives, with the local resource deletion at least one antenna in the described many antennas.BBU is connected example shown in Figure 1B with multichannel RRU's.A plurality of multichannel RRU also can corresponding sub-district, perhaps part antenna on multichannel RRU and the corresponding sub-district of antenna on other multichannel RRU or the single channel RRU.This multichannel RRU can be connected with a plurality of single channel RRU, a plurality of RRU of the prior art, constitutes series, parallel or series-parallel connection relation, and multichannel RRU, single channel RRU and RRU of the prior art can corresponding sub-districts.
Perhaps, send after the analog radio-frequency signal that the antenna that RRU is used for connecting receives is converted to digital signal, and the digital signal of receiving is converted to behind the analog radio-frequency signal by an antenna transmission.This RRU also is used for setting up request message sub-district of an antenna configurations for connecting according to the sub-district that receives, and according to the sub-district deletion request message that receives, the local resource on the described antenna is deleted.A plurality of single channel RRU can corresponding sub-district, and BBU is connected example as shown in Figure 2 with single channel RRU's.This single channel RRU can be connected with a plurality of multichannel RRU, a plurality of RRU of the prior art, constitutes series, parallel or series-parallel connection relation.
A BBU can connect a plurality of RRU, and the example that present embodiment provides the RRU that a BBU connects a plurality of series relationship as shown in Figure 3.
Distributed base station also can comprise one or more baseband interfaces unit (BIU), and shown in Fig. 2,4-8, BIU is used to transmit the digital signal between BBU and the RRU, and RRU can be connected with any BBU, makes network construction form more flexible.
By the foregoing description as can be known, a BBU has connected many antennas that surpass its designed capacity, and BBU must handle the signal from more antenna in its designed capacity scope, present embodiment provides the method for merging from the digital signal of many antennas, makes BBU handle the multi-path digital signal that meets designed capacity.
The method that merges digital signal is: according to the time synchronized principle, carry out the multi-path digital signal of same subcarrier of correspondence and same sub-district vector superposed.Multi-path digital signal with corresponding same sub-carrier and same sub-district on the I component direction, carry out overlap-add operation according to identical time location, and, carry out overlap-add operation according to identical time location with the multi-path digital signal of corresponding same sub-carrier and same sub-district on the Q component direction.In the present embodiment, digital signal being regarded as the continuous combination of " 1 " and " 0 ", is 1100 as the data of a way word signal on a time point, and each " 1 " or " 0 " promptly are data.According to identical time point, the stack of multi-path digital signal is the data step-by-step addition of multi-path digital signal, carries out the operation of binary addition.Present embodiment is described further by Mathematical Modeling.Suppose that the digital signal of certain time point is expressed as the form of an+jbn, a represents the data on the I component direction, and j represents Q component, and then b represents the data on the Q component direction, and n gets different values to identify each way word signal.So, the merging process of digital signal can be expressed as:
(a1+j＊b1)+(a2+j＊b2)+...+(an+j＊bn)＝(a1+a2+...+an)+j＊(b1+b2+...+bn)
A plurality of unit of distributed base station inside all can carry out the union operation of digital signal, all can carry out union operation as BBU, BIU and RRU.
Understood the structure of distributed base station, just can carry out the operation of plot planning, comprised that the sub-district is set up and the sub-district deletion.
Referring to Fig. 9, the main method flow process that the sub-district is set up in the present embodiment is as follows:
Step 901: be at least two local district identifications that antenna assignment is identical.
Step 902: be described at least two antenna configurations peak power outputs.
Step 903: be described at least two antenna configurations training sequences and channel resource etc.
The said method flow process has realized the corresponding sub-district of many antennas, can adopt the diversity of mimo system or multiplex technique to improve the transmission quality in the sub-district or improve the bearing capacity of sub-district.The method that the sub-district is set up is described in detail below, and first kind of situation is that process is set up in RNC initiation sub-district, and referring to shown in Figure 10, the concrete grammar flow process is as follows:
Step 1001:RNC initiates the resource audit process, sends audit request information to Node B, and notice Node B carries out the resource audit.Perhaps, Node B is periodically initiatively to RNC report auditing result.
The audit response message that step 1002:RNC returns according to Node B determines that needs carry out the sub-district and set up.
Step 1003:RNC sends the sub-district to Node B and sets up request message.
RNC can to indicate Node B be concrete antenna configurations local resource by set up in the request message mode that increases cell in the sub-district, cell as (T1, T3, T5), be expressed as the identical local resource of antenna configurations that is designated T1, T3 and T5, i.e. the corresponding same sub-district of antenna T1, T3 and T5.Can further increase cell, as (R1 (T1, T3 about RRU, T5), R3 (T1, T2, T4)), be expressed as the antenna that is designated T1, T3 and T5 on the RRU that is designated R1 and be designated the identical local resource of antenna configurations that is designated T1, T2 and T4 on the RRU of R3.Perhaps, to set up request message indication Node B be the many local resources (identical local district identification is put in outstanding assignment) that antenna configurations is identical to RNC by repeatedly sending the sub-district.Perhaps, to set up request message indication Node B be the different local resource (different local district identifications is put in outstanding assignment) of many antenna configurations on the RRU to RNC by repeatedly sending the sub-district.
RNC can be further to indicate Node B be a plurality of sub-districts of antenna configurations by set up the mode that increases cell in the request message in the sub-district, as configuration single-frequency point sub-district.
It is the many local district identifications that antenna assignment is identical that step 1004:Node B sets up request message according to the sub-district of receiving, and preserves allocation result.Local district identification is the sign of distinguishing cell, as long as the local district identification difference in two zones, then these two zones belong to different sub-districts.
Node B can set up the antenna sign of carrying in the request message according to the sub-district corresponding antenna is configured.Perhaps, set up when the sub-district and not carry antenna when sign in the request message, Node B determines that according to auditing result needs carry out the antenna that the sub-district is set up, and sets up request message according to the sub-district corresponding antenna is configured.
It is many antenna configurations peak power outputs that step 1005:Node B sets up request message according to the sub-district of receiving.
It is many antenna configurations channel resources that step 1006:Node B sets up request message according to the sub-district of receiving, sets up CPICH, PSCH, SSCH, PCCPCH, BCH.
Second kind of situation is that process is set up in OMC initiation sub-district, and referring to shown in Figure 11, the concrete grammar flow process is as follows:
Step 1101:OMC triggers RNC by control messages and begins sub-district foundation.
Step 1102:RNC sets up request message to Node B transmission sub-district after receiving control messages.
It is the many local district identifications that antenna assignment is identical that step 1103:Node B sets up request message according to the sub-district of receiving, and preserves allocation result.Wherein, Node B knows that according to the control messages that the OMC that receives sends needs carry out the antenna of cell configuration.
It is many antenna configurations peak power outputs that step 1104:Node B sets up request message according to the sub-district of receiving.
It is many antenna configurations channel resources that step 1105:Node B sets up request message according to the sub-district of receiving.
The evolution base station that OMC also can trigger in the LTE system begins sub-district foundation, according to the control messages that OMC sends corresponding many antennas is carried out cell configuration by evolution base station, to set up the sub-district.
The third situation is to initiate the sub-district by evolution base station to set up process in the LTE system, and referring to shown in Figure 12, the concrete grammar flow process is as follows:
Step 1201: evolution base station is initiated the sub-district according to the situation of physical resource and logical resource and is set up.
Step 1202: evolution base station is the many local district identifications that antenna assignment is identical, and preserves allocation result.
Step 1203: evolution base station is many antenna configurations peak power outputs.
Step 1204: evolution base station is many antenna configurations channel resources.
Referring to Figure 13, the main method flow process of sub-district deletion is as follows in the present embodiment:
Step 1301: delete in the many antennas of corresponding same sub-district common signal channel and dedicated channel at least one antenna.
Step 1302: the state of sub-district on the described at least one antenna and common signal channel is changed to do not exist.
Step 1303: remove the Radio Link on the described at least one antenna.
Referring to Figure 14, the concrete grammar flow process of sub-district deletion is as follows in the present embodiment:
Step 1401: the operation of sub-district is determined to delete in the base station.
The base station can determine that needs remove the local resource of certain antenna according to the situation of physical resource and logical resource, i.e. Shan Chu all or part of sub-district.Perhaps, the sub-district deletion request message that the base station sends according to RNC determines that needs delete the operation of sub-district, wherein, can initiate the sub-district deletion action by RNC or OMC, the base station can be according to the local resource on many antennas of a sub-district deletion request message deletion of receiving, perhaps deletes local resource on the many antennas under the same sub-district respectively according to many sub-district deletion request messages of receiving.
Perhaps, when an a plurality of sub-district of antenna correspondence, the part or all of sub-district on the antenna can be deleted in the base station.
Step 1402: common signal channel and the dedicated channel at least one antenna deleted in the many antennas of corresponding same sub-district in the base station.
Step 1403: the base station is changed to the state of sub-district on the described at least one antenna and common signal channel and does not exist.
Step 1404: the Radio Link on the described at least one antenna is removed in the base station.
Understood the method for deleting by the description of the foregoing description, so just can further realize change, planned the sub-district again, comprised that cell splitting and sub-district merge about the cell networking of many antennas about the sub-district foundation and the sub-district of many antennas.
Cell splitting is to be a plurality of sub-districts with a cell splitting, can be a sub-district of many antenna correspondences of deletion, be at least two sub-districts of many antennas foundation then; Perhaps, delete the local resource of many antenna middle part divided antennas of corresponding same sub-district, set up new sub-district for this part antenna then.Cell splitting can adapt to the growth requirement of communication service and communication user, also be applicable to the change of multiple actual environment, as a newly-built skyscraper between two antennas of the same sub-district of correspondence, then cause these two antenna coverage areas to be isolated, stop the transmission of wireless signal, and may cause increasing sharply of communication service and communication user.The cell splitting process can be controlled by OMC.Present embodiment provides a kind of method of dynamically carrying out cell splitting, and with the surrounding enviroment and the wireless transmission requirement of flexible adaptation reality, referring to shown in Figure 15, the main method flow process is as follows:
Step 1501: add up that total physical resource takies situation on the many antennas of corresponding same sub-district.Can carry out statistical operation to all sub-districts simultaneously, present embodiment is that example is elaborated with a sub-district.
Step 1502: determine that the physical resource that has taken continues to be not less than preset threshold value in the default time, and when reaching default time, determine to carry out cell splitting.
Step 1503: described same cell splitting is at least two sub-districts, and described many antennas are configured to described at least two sub-districts respectively.
Wherein, physical resource comprises transmitting power and code channel resource etc., can carry out cell splitting according to each physical resource, is described in detail respectively below.
Referring to Figure 16 A, the concrete grammar flow process of carrying out cell splitting according to transmitting power is as follows:
Step 1601: total transmitting power of adding up many antennas of corresponding same sub-district.
Step 1602: when total transmitting power reaches power division threshold value, begin to carry out timing.
Step 1603: whether the time of judging timing reaches the default time, and judges whether total transmitting power continues to meet or exceed power division threshold value.
Step 1604: when the time of timing reaches the default time and always transmitting power continues to meet or exceed power division threshold value, initiate the cell splitting operation.Continue step 1606.For example, maximum transmission power is m watt, and the default time is n days, and power division threshold value is 10 watts, when total transmitting power 10 between m and lasting n days the time, determine to carry out cell splitting.
Step 1605: when the time of timing does not reach default total transmitting power of time and just drops to power division threshold value when following, to the time zero clearing of timing.Can continue step 1601.
Step 1606 a: cell splitting is at least two sub-districts.Concrete mode has multiple, as the local resource at least two antennas as described in deleting, and is respectively the different local resource of described at least two antenna configurations; Perhaps, delete in described two antennas the local resource on the antenna at least, and be different from the local resource of described same sub-district for a described antenna configurations.Can continue step 1601.
Referring to Figure 16 B, the concrete grammar flow process of carrying out cell splitting according to transmitting power is as follows:
Step 1611: add up that total code channel resource takies situation on the many antennas of corresponding same sub-district, concrete mode is that telephone traffic is added up.
Step 1612: when the code channel resource that has taken reaches code channel division threshold value, begin to carry out timing.
Step 1613: whether the time of judging timing reaches the default time, and judges whether total transmitting power continues to meet or exceed code channel division threshold value.
Step 1614: reach the default time and the code channel resource that taken when continuing to meet or exceed code channel division threshold value when the time of timing, initiate the cell splitting operation.Continue step 1616.
Step 1615: when the time of timing does not reach code channel resource that the default time taken and just drops to code channel division threshold value when following, to the time zero clearing of timing.Can continue step 1611.
Step 1616 a: cell splitting is at least two sub-districts.Concrete mode has multiple, as the local resource at least two antennas as described in deleting, and is respectively the different local resource of described at least two antenna configurations; Perhaps, delete in described two antennas the local resource on the antenna at least, and be different from the local resource of described same sub-district for a described antenna configurations.Can continue step 1611.
Above-mentioned two embodiment carry out the method description of cell splitting according to transmitting power and code channel resource respectively, can be further with above-mentioned two embodiment combinations, when in transmitting power and code channel resource are reaching default time, all continuing to be not less than separately corresponding threshold, determine to carry out cell splitting.
The process corresponding with the cell splitting process is that the sub-district merges, and it is that a sub-district is merged in a plurality of sub-districts that the sub-district merges.Promptly delete the local resource on the many antennas of corresponding a plurality of sub-districts, identical to these many antenna configurations again local resource; Perhaps, the local resource on the many antennas of a sub-district of deletion, identical to these many antenna configurations again local resource with another sub-district.The sub-district merges the change that is applicable to multiple actual environment, is removed as the skyscraper between adjacent two sub-districts, and the transmission path of the wireless signal that then originally stopped becomes unimpeded, and may cause the rapid minimizing of communication service and communication user.The sub-district merging process can be controlled by OMC.Present embodiment provides a kind of method that the sub-district merges of dynamically carrying out, and with the surrounding enviroment of flexible adaptation reality, referring to shown in Figure 17, method flow is as follows:
Step 1701: the physical resource of adding up in each sub-district takies situation.
Step 1702: determine to exist at least two sub-districts, for each sub-district at least two sub-districts, the physical resource that has taken in the default time continues to be not more than preset threshold value (claiming to merge threshold value in the present embodiment), and determines to carry out the sub-district when all reaching default time at least in described two sub-districts and merge.
Step 1703: a sub-district is merged in described at least two sub-districts, is a described sub-district with many antenna configurations of former described at least two sub-districts of correspondence.Specific implementation has multiple, as at least two sub-districts as described in deleting, and is the identical local resource of many antenna configurations under described at least two sub-districts again; , be the antenna configurations local resource identical of this sub-district correspondence perhaps with another sub-district as the local resource on the antenna of a sub-district correspondence at least two sub-districts as described in deleting.
Wherein, physical resource comprises transmitting power and code channel resource etc., can carry out cell splitting according to each or several physical resources.
Understood the structure of distributed base station and the method for plot planning by the description of the foregoing description, the structure to the internal element of distributed base station is described below.
Referring to Figure 18, the RRU in the present embodiment comprises external interface unit 1801, radio frequency unit 1802 and dispensing unit 1803.
It is at least one sub-district that dispensing unit 1803 is used for setting up the described many antenna configurations that request message will connect according to the sub-district that receives, and according to the sub-district deletion request message that receives, with the deletion of the local resource at least one antenna in the described many antennas.
RRU also comprises intermediate frequency unit 1804 and merge cells 1805, referring to shown in Figure 19.
Intermediate frequency unit 1804 is used for the radiofrequency signal that described radio frequency unit receives is converted to digital signal.
Merge cells 1805 is used for the digital signal of many antennas of corresponding same sub-carrier of described digital signal and same sub-district vector superposed.
Referring to Figure 20, be used in the present embodiment planning that the device (present embodiment claims the plot planning unit) of sub-district comprises statistic unit 2001, control unit 2002 and dispensing unit 2003.
The physical resource that statistic unit 2001 is used to add up many antennas of corresponding same sub-district takies situation.
Described plot planning unit can belong to RNC, OMC or evolution base station.The plot planning unit can exist with unit independently in evolution base station, perhaps global existence is in evolution base station in the existing unit, as belong to BBU, perhaps be present in a plurality of unit in the evolution base station, can be arranged in RRU as statistic unit 2001, control unit 2002 can be arranged in RRU or BBU, and dispensing unit 2003 can be arranged in BBU.
Referring to Figure 21, the RNC in the present embodiment comprises interface unit 2101 and plot planning unit 2102.
By described interface unit 2101 when determining to carry out cell splitting, send about the message that is two sub-districts with described same cell splitting to the base station, and when determining that need carry out the sub-district merges, send about a plurality of sub-districts being merged into the message of a sub-district to the base station.
Structure and RNC when OMC comprises the plot planning unit are similar, do not repeat them here.
The embodiment of the invention provides the method for plot planning, comprise that sub-district deletion, cell splitting and sub-district merge, realized the flexible networking of sub-district, can carry out dynamic plot planning and networking, saved human resources and improved communication transmission quality according to actual environment.And the embodiment of the invention provides the device that is used to plan the sub-district and distributed base station etc., has realized cell networking flexibly.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (41)
1, a kind of sub-district delet method of distributed base station is characterized in that, may further comprise the steps:
Delete in the many antennas of corresponding same sub-district common signal channel and dedicated channel at least one antenna;
The state of sub-district on the described at least one antenna and common signal channel is changed to do not exist;
Remove the Radio Link on the described at least one antenna.
2, sub-district as claimed in claim 1 delet method is characterized in that described many antennas belong to identical or different RRU.
3, sub-district as claimed in claim 1 delet method is characterized in that described at least one antenna is common antenna, or is the smart antenna that comprises a plurality of antenna elements, or is poliarizing antenna.
4, sub-district as claimed in claim 1 delet method is characterized in that, deletes common signal channel and dedicated channel on the many antennas under the described same sub-district according to a sub-district deletion request message.
5, a kind of cell splitting method is characterized in that, may further comprise the steps:
The physical resource of adding up on the many antennas of corresponding same sub-district takies situation;
Determine that the physical resource that has taken continues to be not less than preset threshold value in the default time, and when reaching default time, determine to carry out cell splitting;
Described same cell splitting is at least two sub-districts, and described many antennas are configured to described at least two sub-districts respectively.
6, cell splitting method as claimed in claim 5, it is characterized in that, when the described physical resource that has taken reaches described threshold value, pick up counting, and the physical resource that has taken when the time of timing does not reach described default time then carries out the timing zero clearing less than described threshold value.
7, cell splitting method as claimed in claim 5, it is characterized in that, described same cell splitting is comprised for the step of two sub-districts at least: delete the local resource on the many antennas of the same sub-district of described correspondence, and be respectively the different local resource of described many antenna configurations; Perhaps, delete the local resource on a part of antenna in the many antennas of the same sub-district of described correspondence, and be different from the local resource of described same sub-district for described a part of antenna configurations.
8, cell splitting method as claimed in claim 7 is characterized in that, described local resource comprises local district identification at least.
9, cell splitting method as claimed in claim 7 is characterized in that, in the allocating cell resource process, when need be for the identical local resource of many antenna configurations, setting up request message according to a sub-district be the many local resources that antenna configurations is identical.
10, cell splitting method as claimed in claim 5 is characterized in that, many antennas of the same sub-district of described correspondence belong to same radio frequency remote unit RRU or belong to different RRU.
11, cell splitting method as claimed in claim 5 is characterized in that, an antenna in the many antennas of the same sub-district of described correspondence is common antenna or is to comprise the smart antenna of a plurality of antenna elements or be poliarizing antenna.
12, cell splitting method as claimed in claim 5 is characterized in that, described physical resource comprises transmitting power and/or code channel resource.
13, cell splitting method as claimed in claim 5 is characterized in that, further will carry out vector superposed according to identical time location from the multi-path digital signal of corresponding same sub-carrier in the digital signal of many antennas of the same sub-district of described correspondence.
14, a kind of sub-district merging method is characterized in that, may further comprise the steps:
The physical resource of adding up in each sub-district takies situation;
At least two sub-districts of definite existence, for each sub-district at least two sub-districts, the physical resource that has taken in the default time continues to be not more than preset threshold value, and determines to carry out the sub-district when all reaching default time at least in described two sub-districts and merge;
A sub-district is merged in described at least two sub-districts, is a described sub-district with many antenna configurations of former described at least two sub-districts of correspondence.
15, sub-district as claimed in claim 14 merging method is characterized in that described physical resource comprises transmitting power and/or code channel resource.
16, a kind of device that is used to plan cell networking is characterized in that, comprising:
Statistic unit, the physical resource that is used to add up on the many antennas of corresponding same sub-district takies situation;
Control unit is used to determine that the physical resource that has taken continues to be not less than preset threshold value in the default time, and determines to carry out cell splitting when reaching default time;
Dispensing unit is used for described same cell splitting is at least two sub-districts, and described many antennas is configured to described at least two sub-districts respectively.
17, device as claimed in claim 16 is characterized in that, described device belongs to radio network controller (RNC), the OMC of operation maintenance center or evolution base station.
18, a kind of RRU is characterized in that, comprising:
External interface unit is used for receiving and sending message;
Radio frequency unit is used to connect many antennas, and receives from the radiofrequency signal of many antennas and to many antenna transmission radiofrequency signals;
Dispensing unit is used for setting up the described many antenna configurations that request message will connect according to the sub-district that receives and is at least one sub-district, and according to the sub-district deletion request message that receives, and the local resource at least one antenna in the described many antennas is deleted.
19, RRU as claimed in claim 18 is characterized in that, also comprises:
Merge cells is used for carrying out vector superposed according to identical time location the digital signal of corresponding same sub-carrier on the many antennas of the corresponding same sub-district of digital uplink signal.
20, a kind of distributed base station is characterized in that, comprising:
Antenna is used for receiving and the launching simulation radiofrequency signal;
Radio frequency remote unit RRU, be connected with many antennas, be used for setting up request message at least one sub-district of many antenna configurations for connecting according to the sub-district that receives, and according to the sub-district deletion request message that receives, with the deletion of the local resource at least one antenna in the many antennas under the same sub-district;
Base Band Unit BBU is used to handle the digital signal from RRU.
21, distributed base station as claimed in claim 20 is characterized in that, sets up request message and sub-district deletion request message by described BBU to the sub-district that described RRU transmits RNC or OMC transmission.
22, distributed base station as claimed in claim 20 is characterized in that, sends the sub-district by OMC to described RRU and sets up request message and sub-district deletion request message.
23, distributed base station as claimed in claim 20 is characterized in that, comprising:
The plot planning unit is used to carry out plot planning, and sets up request message and sub-district deletion request message to described RRU transmission sub-district.
24, distributed base station as claimed in claim 23 is characterized in that, the plot planning unit is positioned at BBU.
25, distributed base station as claimed in claim 20 is characterized in that, comprises a plurality of described RRU, and a plurality of described RRU are series, parallel or series-parallel connection relation; And/or
Other RRU that described RRU and described distributed base station comprise is the serial or parallel connection relation.
26, distributed base station as claimed in claim 25 is characterized in that, the corresponding same sub-district of at least one antenna at least one antenna among a plurality of described RRU on described RRU and other described RRU.
27, a kind of distributed base station is characterized in that, comprising:
Antenna is used for receiving and the launching simulation radiofrequency signal;
A plurality of RRU, being respectively applied for and setting up request message according to the sub-district that receives is a locally-attached antenna configurations local resource, and according to the sub-district deletion request message that receives, the local resource on the locally-attached antenna is deleted; Wherein, the many antenna configurations of described a plurality of RRU have identical local resource;
BBU is used for the digital signal from RRU is handled.
28, distributed base station as claimed in claim 27 is characterized in that, described a plurality of RRU are series, parallel or series-parallel connection relation; With
Other RRU that described a plurality of RRU and described distributed base station comprise is the serial or parallel connection relation.
29, distributed base station as claimed in claim 27 is characterized in that, sets up request message and sub-district deletion request message by described BBU to the sub-district that described RRU transmits RNC or OMC transmission.
30, distributed base station as claimed in claim 27 is characterized in that, sends the sub-district by OMC to described RRU and sets up request message and sub-district deletion request message.
31, distributed base station as claimed in claim 27 is characterized in that, comprising:
The plot planning unit is used to carry out plot planning, and sets up request message and sub-district deletion request message to described RRU transmission sub-district.
32, a kind of distributed base station is characterized in that, comprising:
Antenna is used for receiving and the launching simulation radiofrequency signal;
Radio frequency remote unit RRU, be connected with many antennas, send after being used for the analog radio-frequency signal from many antennas is converted to digital signal, wherein, the corresponding same sub-district of described many antennas, or each the part antenna in the described many antennas corresponds to different sub-districts respectively;
Base Band Unit BBU is used to handle the digital signal from RRU.
33, distributed base station as claimed in claim 32 is characterized in that, comprises a plurality of described RRU, and a plurality of described RRU are series, parallel or series-parallel connection relation; And/or
Other RRU that described RRU and described distributed base station comprise is the serial or parallel connection relation.
34, distributed base station as claimed in claim 33 is characterized in that, the corresponding same sub-district of at least one antenna among at least two RRU on each RRU.
35, distributed base station as claimed in claim 34 is characterized in that, the corresponding same sub-district of all RRU that described distributed base station comprises.
36, distributed base station as claimed in claim 32 is characterized in that, also comprises:
Baseband interface unit B IU is used for transmitting digital signal between described BBU and described RRU.
37, distributed base station as claimed in claim 36 is characterized in that, described RRU is a plurality of, and described BIU is a plurality of; A plurality of described RRU are connected with described BBU by a plurality of described BIU respectively.
38, distributed base station as claimed in claim 32 is characterized in that, distributed base station comprises a plurality of described BBU.
39, a kind of distributed base station is characterized in that, comprising:
Antenna is used for receiving and the launching simulation radiofrequency signal;
A plurality of RRU, each RRU comprise an antenna, send after being used for the analog radio-frequency signal from antenna is converted to digital signal; Wherein, the corresponding same sub-district of the many antennas of described a plurality of RRU;
BBU is used for the digital signal from RRU is handled.
40, distributed base station as claimed in claim 39 is characterized in that, described a plurality of RRU are series, parallel or series-parallel connection relation; With
Other RRU that described a plurality of RRU and described distributed base station comprise is the serial or parallel connection relation.
41, distributed base station as claimed in claim 39 is characterized in that, also comprises:
One or more baseband interface unit B IU are used for transmitting digital signal between described BBU and described a plurality of RRU.
Priority Applications (2)
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| CN 200710122184 CN101394647B (en) | 2007-09-21 | 2007-09-21 | Method and system for realizing cell networking |
| PCT/CN2008/001622 WO2009049473A1 (en) | 2007-09-21 | 2008-09-18 | A method for implementing cells networking and a system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200710122184 CN101394647B (en) | 2007-09-21 | 2007-09-21 | Method and system for realizing cell networking |
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| CN 201110300574 Division CN102340783A (en) | 2007-09-21 | 2007-09-21 | Method and system for realizing cell networking |
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| CN101394647A true CN101394647A (en) | 2009-03-25 |
| CN101394647B CN101394647B (en) | 2013-10-02 |
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| CN 200710122184 Active CN101394647B (en) | 2007-09-21 | 2007-09-21 | Method and system for realizing cell networking |
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| WO (1) | WO2009049473A1 (en) |
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| WO2009049473A1 (en) | 2009-04-23 |
| CN101394647B (en) | 2013-10-02 |
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