CN101198142A - Load equalization method among frequency points of N frequency point cell - Google Patents
Load equalization method among frequency points of N frequency point cell Download PDFInfo
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- CN101198142A CN101198142A CNA2006101648411A CN200610164841A CN101198142A CN 101198142 A CN101198142 A CN 101198142A CN A2006101648411 A CNA2006101648411 A CN A2006101648411A CN 200610164841 A CN200610164841 A CN 200610164841A CN 101198142 A CN101198142 A CN 101198142A
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Abstract
The present invention provides a load balancing method between frequency points of a N frequency point cell and comprises that: the procedure S110: the wireless channel occupation, downlink emissive power occupation and each uplink time-slot interference occupation of each frequency point in a target cell are inquired from a resource table of a wireless network controller; the procedure S120: according to a common measuring report of a network node B, the downlink emissive power occupation and each uplink time-slot interference occupation of each frequency point in the target cell are achieved; the procedure S130: the signal-interference ratio between the uplink and the downlink of each frequency point in the target cell is acquired from a background configuration; the procedure S140: the downlink emissive power increment and the uplink interference increment caused by user equipment being connected to each frequency point in each time-slot are calculated; the procedure S150: the numbers of the allocatable downlink wireless channel and the allocatable uplink wireless channel of each frequency point are calculated; the procedure S160: the usable frequency points are selected; the procedure S170: the target frequency point is determined. The method provided by the invention not only ensures that the resource of the selected frequency point can support the current business adequately but also avoids overloading of partial frequency points and the surplus of partial resource in the cell caused by the load imbalance between the frequency points and has good maneuverability.
Description
Technical field
The invention belongs to the mobile communication technology field, relate in particular to a kind of TD SDMA and insert (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) load equalization method between the frequency of N frequency point cell in the system.
Background technology
In wireless telecommunication system, because single-frequency point cell capacity is less, usually can adopt a plurality of the stack to satisfy capacity requirement with the covering frequency, this method is called alien frequencies with the coverage cell stacking method.Alien frequencies with the coverage cell stacking method in, the system of selection of frequency or be minimum or be principle to the maximum, or be principle to disturb minimum according to residue RU number, but simple to operate can produce a plurality of with covering the interference of frequencies to measuring etc.
In the TD-SCDMA system, also adopt this method to improve power system capacity, satisfy system's needs.For fear of a plurality of with covering the interference of frequencies to measuring etc., can dominant frequency point of configuration with covering in the frequency, have only this dominant frequency point can send broadcast, support the measurement of beacon channel.The wireless quality of other frequencies obtains the measurement of the beacon channel that depends on this dominant frequency point, thinks identical with the wireless quality of this dominant frequency point.These are with covering the shared same cell ID of frequency, promptly so-called N frequency point cell.For the N frequency point cell in the TD-SCDMA system, subscriber equipment (User Equipment, UE) initial radio resource control (the Radio Resources Control that inserts, RRC) connection message receives from dominant frequency point, it also is the beacon channel of measuring dominant frequency point that wireless quality in the calling maintenance process is measured, and network side is according to the relation that covers the business connection being assigned on a certain frequency between frequency in the N frequency point cell.Concrete which frequency of access will be considered wireless channel (the Radio Resource of current each frequency, RU) take the interference that situation, each frequency down transmitting power take situation, up each time slot of each frequency and take situation etc., resource is enough supported current business in the frequency that should guarantee to select, and avoids the uneven situation generation that causes the inner part-frequency point overload in sub-district, part resources left of load between each frequency again.
It is a plurality of with covering the interference of frequencies to measuring etc. that the N frequency point cell can effectively be avoided, but do not have effective N frequency point cell resource allocation policy in the prior art, lacks operability.
Summary of the invention
Technical problem to be solved by this invention provides load equalization method between the frequency of N frequency point cell in a kind of TD-SCDMA system, enough supports current business can avoid again that the uneven situation of the inner part-frequency point overload in sub-district, part resources left that causes of load takes place between each frequency with resource in the frequency that guarantees to select.
To achieve these goals, the invention provides load equalization method between a kind of frequency of N frequency point cell, be used to comprise the TD-SCDMA system of radio network controller, network node B and portable terminal, it is characterized in that this method comprises:
Step S110: the wireless channel of each frequency takies the interference that situation, down transmitting power take situation and up each time slot and takies situation in the query aim sub-district from the resource table of radio network controller;
Step S120: the interference that takies situation and up each time slot of each frequency according to each frequency down transmitting power in the network node B public-measurement report acquisition Target cell takies situation;
Step S130: dispose the up-downgoing signal interference ratio that obtains each frequency the Target cell from the backstage;
Step S140: utilize known algorithm calculating subscriber equipment to insert down transmitting power increment and the uplink interference increment that each time slot of each frequency brings according to current circuit loss in signal interference ratio, the idle message and uplink interference sign indicating number power information;
Step S150: calculate descending wireless channel number and the up wireless channel number that distributes of distributing of each frequency,
Wherein, effective idle wireless channel number refers to the current wireless channel number that distributes, DeltaP is the down transmitting power increment, the effective idle wireless channel number of descending time slot is that total wireless channel number of descending time slot and descending time slot have taken the poor of wireless channel number, the descending time slot power headroom is the poor of descending time slot maximum permission transmitting power and current transmit power, DeltaI is the uplink interference increment, the effective idle wireless channel number of ascending time slot is that total wireless channel number of ascending time slot and ascending time slot have taken the poor of wireless channel number, and the ascending time slot interference margins is the poor of ascending time slot maximum permission interference value and current interference value;
Step S160: select available frequency, descending to distribute wireless channel number and the up frequency that distributes the wireless channel number all to satisfy the current business demand be available frequency;
Step S170: determine the target frequency, selecting the descending maximum frequency of wireless channel number that distributes in available frequency is the target frequency.
Above-mentioned method, its characteristics are that described idle message comprises radio resource control connection request message and basic Common Control Physical Channel quality measurement reports message.
Above-mentioned method, its characteristics are, if this frequency is selected to set up triggering by new business, then further comprise from described radio resource control connection request message and obtain described current circuit loss;
Above-mentioned method, its characteristics are, if this frequency selection is to be triggered by switch reasons, then obtain described current circuit loss from described basic Common Control Physical Channel quality measurement reports message.
Above-mentioned method, its characteristics are that described step S140 further comprises: if this frequency is selected to reshuffle triggering by unlimited resources, then obtain equivalent path loss as described current circuit loss from the backstage configuration.
Adopt such scheme to take into full account the interference that the RU occupation condition of each frequency, each frequency down transmitting power in the sub-district take situation, up each time slot of each frequency and take situation etc., the resource that had both guaranteed the selected frequency that goes out is enough supported current business, can avoid the uneven situation generation that causes the inner part-frequency point overload in sub-district, part resources left of load between each frequency again, have better operability.
Further specify specific embodiments of the invention below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the steps flow chart schematic diagram of the inventive method.
Embodiment
As shown in Figure 1, the steps flow chart of the inventive method is as follows:
Step S100: service access N frequency point cell triggers frequency and selects;
Step S101: from radio network controller (Radio Network Controller, RNC) in the resource table in the query aim sub-district RU of each frequency take situation, descending maximum transmitting power and the up maximum interference value that allows of allowing;
Step S102: the interference (Interference Signal Code Power) that takies situation and up each time slot of each frequency according to each frequency descending carrier transmitting power in the Node B public-measurement report acquisition Target cell takies situation;
Step S103: dispose the up-downgoing signal interference ratio that obtains each frequency the Target cell from the backstage;
Step S104: judge whether the selection of this time frequency sets up triggering by new business, if, execution in step S105, otherwise execution in step S106;
Step S105: (Radio Resources Control RRC) obtains current circuit loss information in the connection request message from radio resource control that business is set up;
Step S106: judge whether the selection of this time frequency is triggered by switch reasons, if, execution in step S107, otherwise execution in step S108;
Step S107: in system, obtain current circuit loss information the basic Common Control Physical Channel quality measurement reports message;
Step S108: obtain equivalent path loss as current circuit loss from the operation maintaining background configuration;
Step S109:, utilize known algorithm to calculate UE and insert down transmitting power increment (DeltaP) and the uplink interference increment (DeltaI) that each time slot of each frequency brings according to current circuit loss, uplink interference sign indicating number power information and the signal interference ratio that obtains from the backstage configuration;
Step S110: calculate descending wireless channel number and the up wireless channel number that distributes of distributing of each frequency,
Wherein effective idle wireless channel number refers to the current wireless channel number that distributes, DeltaP is the down transmitting power increment, the effective idle wireless channel number of descending time slot is that total wireless channel number of descending time slot and descending time slot have taken the poor of wireless channel number, the descending time slot power headroom is the poor of descending time slot maximum permission transmitting power and current transmit power, DeltaI is the uplink interference increment, the effective idle wireless channel number of ascending time slot is that total wireless channel number of ascending time slot and ascending time slot have taken the poor of wireless channel number, and the ascending time slot interference margins is the poor of ascending time slot maximum permission interference value and current interference value;
Step S111: select available frequency, descending to distribute wireless channel number and the up frequency that distributes the wireless channel number all to satisfy the current business demand be available frequency;
Step S112: determine the target frequency, selecting the descending maximum frequency of wireless channel number that distributes in available frequency is the target frequency.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (5)
1. load equalization method between the frequency of a N frequency point cell is used to comprise the TD-SCDMA system of radio network controller, network node B and portable terminal it is characterized in that this method comprises:
Step S110: the wireless channel of each frequency takies the interference that situation, down transmitting power take situation and up each time slot and takies situation in the query aim sub-district from the resource table of radio network controller;
Step S120: the interference that takies situation and up each time slot of each frequency according to each frequency down transmitting power in the network node B public-measurement report acquisition Target cell takies situation;
Step S130: dispose the up-downgoing signal interference ratio that obtains each frequency the Target cell from the backstage;
Step S140: utilize known algorithm calculating subscriber equipment to insert down transmitting power increment and the uplink interference increment that each time slot of each frequency brings according to current circuit loss in signal interference ratio, the idle message and uplink interference sign indicating number power information;
Step S150: calculate descending wireless channel number and the up wireless channel number that distributes of distributing of each frequency,
Wherein, effective idle wireless channel number refers to the current wireless channel number that distributes, DeltaP is the down transmitting power increment, the effective idle wireless channel number of descending time slot is that total wireless channel number of descending time slot and descending time slot have taken the poor of wireless channel number, the descending time slot power headroom is the poor of descending time slot maximum permission transmitting power and current transmit power, DeltaI is the uplink interference increment, the effective idle wireless channel number of ascending time slot is that total wireless channel number of ascending time slot and ascending time slot have taken the poor of wireless channel number, and the ascending time slot interference margins is the poor of ascending time slot maximum permission interference value and current interference value;
Step S160: select available frequency, descending to distribute wireless channel number and the up frequency that distributes the wireless channel number all to satisfy the current business demand be available frequency;
Step S170: determine the target frequency, selecting the descending maximum frequency of wireless channel number that distributes in available frequency is the target frequency.
2. method according to claim 1 is characterized in that, described idle message comprises radio resource control connection request message and basic Common Control Physical Channel quality measurement reports message.
3. method according to claim 2 is characterized in that, if this frequency is selected to set up triggering by new business, then further comprises from described radio resource control connection request message and obtains described current circuit loss.
4. method according to claim 2 is characterized in that, if this frequency selection is to be triggered by switch reasons, then obtains described current circuit loss from described basic Common Control Physical Channel quality measurement reports message.
5. method according to claim 1 is characterized in that, described step S140 further comprises: if this frequency is selected to reshuffle triggering by unlimited resources, then obtain equivalent path loss as described current circuit loss from the backstage configuration.
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