CN101420733A - SDMA protection method for small region marginal customer of HSDPA system - Google Patents
SDMA protection method for small region marginal customer of HSDPA system Download PDFInfo
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Abstract
The invention discloses a space division multiple access (SDMA) protection method of an edge user of a cell in an HSDPA system. The method comprises the following steps: A1. acquiring SDMA user information of the cell and recording reporting information of various users; and A2. judging whether any user is on the edge of the cell according to the reporting information of various users, if yes, executing the step A3; A3. deleting the user from an SDMA user collection and transmitting data for the user by a CDMA method. Therefore, when the SDMA user is on the edge of the cell and the signal is weak, the data is not transmitted by the SDMA method, which can ensure the signal quality and avoid occurrence of error blocks; when a non-SDMA user satisfies the condition of data transmission by the SDMA method, the non-SDMA user is added to the SDMA user collection, and the data is transmitted by the SDMA method for the user. The method has the advantages of flexible application, convenient implementation and effective protection for the signal quality of the edge user.
Description
Technical field
The present invention relates to a kind of TDD (Time Division Duplexing; time division duplex) SDMA of communication system (Spatial Division Mutiple Access; space division multiple access) method; in particular; the SDMA guard method of a kind of third generation mobile field HSDPA (High-Speed Downlink Packet Access, high-speed downlink packet inserts) system cell edge customer.
Background technology
Because in TD-SCDMA (TD SDMA) the HSDPA system of prior art, adopted array antenna, it is multiplexing to make that the user can carry out sign indicating number by the mode that sky divides, but the problem that has random schedule, the interference variations that causes the user to receive is bigger, especially be in the user of cell edge, because adjacent area interference is relatively bigger, it is also bigger to be positioned at the interference variations that the dispatched users on the different directions brings, so bigger situation of interference environment amplitude of variation when being easier to occur twice scheduling, this tenacious tracking to CQI is unfavorable, especially when the user when adopting the SDMA pattern, itself divides power equally, if this moment, adjacent area interference increased severely, causes transmission block to take defeat possibly.
Consider that from other angle signal own is more weak when the user is in cell edge,, cause signal quality to be difficult to guarantee probably, cause the generation of mistake piece if adopt the SDMA mode again.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
The object of the present invention is to provide a kind of space division multiple access guard method of HSDPA system cell edge customer,, no longer adopt the SDMA mode, and the CDMA mode that adopts this user to use is originally carried out transfer of data when the user is in the cell edge signal when more weak.
Technical scheme of the present invention is as follows:
A kind of space division multiple access guard method of HSDPA system cell edge customer wherein, may further comprise the steps: A1, obtain the SDMA user profile of sub-district, write down each user's reporting information; A2, according to each user's reporting information, judge whether arbitrary user is in cell edge, be execution in step A3 then; A3, gather this user of deletion, and adopt the CDMA mode to transmit data for this user SDMA user.
Described guard method, wherein, steps A 1 also comprises the non-SDMA user profile that obtains the sub-district; And steps A 2 specifically comprises step: according to each user's reporting information, judging whether arbitrary user is in cell edge, is execution in step A30 then, otherwise execution in step A4; A30, judge whether SDMA user of this user, be execution in step A3 then, otherwise no longer carry out subsequent step; A4, judge whether SDMA user of this user, otherwise adopt the SDMA mode to transmit data this user.
Described guard method, wherein, each user's of record described in the steps A 1 reporting information specifically may further comprise the steps: A111, each user's of periodic logging received signal code power and Interference Signal Code Power; A112, write down the current signal interference ratio of each user; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio, and judge that whether its current received signal code power is less than second thresholding that pre-sets less than first thresholding that pre-sets.
Described guard method; wherein; steps A 111 is further comprising the steps of: to the received signal code power and the Interference Signal Code Power of current acquisition, adopt forgetting factor to carry out time smoothing respectively and handle, as current received signal code power and Interference Signal Code Power.
Described guard method wherein, obtains the span of described first thresholding, described second thresholding respectively by link simulation, carry out test optimization then in the outfield and obtain described first thresholding and described second thresholding.
Described guard method wherein, in the steps A 112, is also write down the 1st signal interference ratio of preceding 1 phase of the current signal interference ratio of each user; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether the 1st signal interference ratio of judging its current signal interference ratio first phase preceding with it all less than first thresholding that pre-sets, and whether the received signal code power of judging the received signal code power first phase preceding with it that it is current is all less than second thresholding that pre-sets.
Described guard method wherein, in the steps A 112, is also write down the 1st signal interference ratio, the 2nd signal interference ratio to the X signal interference ratio of the preceding X phase of the current signal interference ratio of each user, and X is the integer greater than 1; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio and its 1st signal interference ratio, the 2nd signal interference ratio to the X signal interference ratio all less than first thresholding that pre-sets, and judge its current received signal code power 1 phase preceding with it to the 1st received signal code power of preceding X phase, the 2nd received signal code power to the X received signal code power whether all less than second thresholding that pre-sets.
Described guard method, wherein, each user's of record described in the steps A 1 reporting information, specifically may further comprise the steps: A121, the current channel quality indication of each user of periodic logging, and the 1st channel quality of preceding Y phase is indicated, the indication of the 2nd channel quality is indicated to the Y-channel quality, and Y is the integer more than or equal to 1; A122, calculate the Y+1 phase mean value of each user's channel quality indication, as the current channel quality indication of each user; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps:, judge that its current channel quality indicates whether less than the 3rd thresholding that pre-sets to arbitrary user.
Described guard method wherein, obtains the span of described the 3rd thresholding by link simulation, carries out test optimization then in the outfield and obtains described the 3rd thresholding.
Also carry out following steps: A120 before the described guard method, steps A 121, according to historical information, pre-set the numerical value of Y.
Adopt such scheme, the invention provides a kind of space division multiple access guard method of HSDPA system cell edge customer, the user is in cell edge when space division multiple access, and when signal is more weak, then no longer adopt the SDMA mode to transmit data, can ensure signal quality like this, avoid the generation of mistake piece; When the non-SDMA user meets the SDMA mode and transmits the condition of data, then,, this user transmits data for adopting the SDMA mode with its set that adds the space division multiple access user.The inventive method applying flexible, it is convenient to realize, has protected the signal quality of edge customer effectively.
Description of drawings
Fig. 1 is the flow chart of a kind of execution mode of the inventive method;
Fig. 2 is the processing execution flow chart of the another kind of execution mode of the inventive method.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Handle because TD-SCDMA HSDPA SDMA system need carry out certain protection to the user of cell edge, just it is not carried out the SDMA transmission as far as possible, to get rid of the SDMA transmission risk of edge customer, to improve the transmission quality of edge customer; Therefore; the present invention proposes a kind of to being in the user's of cell edge guard method in the TD-SCDMA SDMA HSDPA outdoor environment; this method can effectively be got rid of edge customer outside the system of SDMA; can adopt CDMA to transmit this user data separately to edge customer, thereby the transmission quality that has reduced edge customer to a certain extent worsen.For example, because outdoor SDMA at first can cause the power loss of 3dB at least, next is in the adjacent area that the user at edge receives and disturbs more intense, NodeB can't control, and makes that the channel quality fluctuation is bigger, is not suitable for the tracking of CQI, even if do not adopt SDMA, the communication of edge customer guarantees it also is a problem, thus do not carry out the data of SDMA transmission edge customer as much as possible, thus improve user satisfaction.
Specifically, the invention provides a kind of space division multiple access guard method of HSDPA system cell edge customer, it may further comprise the steps: A1, obtain the SDMA user profile of sub-district, write down each user's reporting information; A2, according to each user's reporting information, judge whether arbitrary user is in cell edge, be execution in step A3 then, that is, judge according to offering on the user whether the user is in cell edge or subscriber channel is relatively poor; A3, gather this user of deletion, and adopt the CDMA mode to transmit data, promptly no longer adopt the SDMA mode to transmit data this user for this user SDMA user.
As shown in Figure 1, one preferably embodiment be also to comprise the non-SDMA user profile that obtains the sub-district in the steps A 1; Specifically, may further comprise the steps.
A1, obtain whole user profile of sub-district, write down each user's reporting information then;
A2, according to each user's reporting information, judge whether arbitrary user is in cell edge, be execution in step A30 then, otherwise execution in step A4;
A30, judge whether SDMA user of this user who is in cell edge, be execution in step A3 then, otherwise no longer carry out subsequent step;
A3, no longer adopt the SDMA mode to transmit data, gather this user of deletion, and adopt the CDMA mode to transmit data for this user SDMA user to this user; No longer carry out subsequent step;
A4, judge that this is not the user SDMA user whether who is in cell edge, if SDMA user does not then do any processing; If not SDMA user, then adopt the SDMA mode to transmit data to this user.
For example, special measurement according to UE reports realization the present invention, NodeB is regular, promptly by the time of pre-seting, follow the tracks of user's PCCPCH (Primary Common Control Physical Channel, Primary Common Control Physical Channel) the quality of reception, receive signal interference ratio SIR, be RSCP/ISCP (receivedsignal code power/interference signal power, received signal code power/Interference Signal Code Power), judge by certain thresholding whether the user is in cell edge, when these parameters reach set thresholding, just this user is rejected outside the SDMA system; Wherein, regularly can set as required by the user.Specifically, adopt this method, the reporting information each user of record described in the steps A 1 specifically can may further comprise the steps.
A111, each user's of periodic logging received signal code power RSCP and Interference Signal Code Power ISCP;
A112, write down the current signal interference ratio RSCP/ISCP of each user; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio, and judge that whether its current received signal code power is less than second thresholding that pre-sets less than first thresholding that pre-sets.
Wherein, can obtain the span of described first thresholding, described second thresholding respectively by link simulation, carry out test optimization then in the outfield and obtain described first thresholding and described second thresholding.
Be more preferably, in steps A 111, further comprising the steps of: as, to adopt forgetting factor to carry out time smoothing respectively and handle, as current received signal code power and Interference Signal Code Power to the received signal code power and the Interference Signal Code Power of current acquisition.Adopt forgetting factor that RSCP, ISCP are carried out smoothing processing respectively, be used to prevent that instantaneous data dithering from causing changing violent and make the inventive method instability; Thereby reduce the sensitiveness of algorithm greatly to error.Can optimize this forgetting factor by engineering test or emulation, the present invention does not give unnecessary details at this.
A preferred embodiment is in steps A 112, also to write down the 1st signal interference ratio of preceding 1 phase of the current signal interference ratio of each user; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether the 1st signal interference ratio of judging its current signal interference ratio first phase preceding with it all less than first thresholding that pre-sets, and whether the received signal code power of judging the received signal code power first phase preceding with it that it is current is all less than second thresholding that pre-sets.
And for example, in steps A 112, also write down the 1st signal interference ratio, the 2nd signal interference ratio to the X signal interference ratio of preceding 1 phase of the current signal interference ratio of each user, preceding 2 phases to preceding X phase, X is the integer greater than 1; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio and its 1st signal interference ratio to the X signal interference ratio all less than first thresholding that pre-sets, and whether the 1st received signal code power to the X received signal code power of judging its current received signal code power 1 phase preceding with it, preceding 2 phases to the preceding X phase is all less than second thresholding that pre-sets.
Generally speaking, in steps A 112, can write down the 1st signal interference ratio, the 2nd signal interference ratio of current signal interference ratio of each user and preceding X phase thereof ... X signal interference ratio, X are the integer more than or equal to 0; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, judge its current signal interference ratio and its 1st signal interference ratio, the 2nd signal interference ratio ... whether the X signal interference ratio is all less than first thresholding that pre-sets, and judge the 1st received signal code power, the 2nd received signal code power of its current received signal code power X phase preceding ... whether the X received signal code power is all less than second thresholding that pre-sets with it.
Here, X can be 0, promptly in the steps A 112, only writes down the current signal interference ratio of each user; Judge described in the steps A 2 then whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio less than first thresholding that pre-sets, and judge that whether its current received signal code power is less than second thresholding that pre-sets.
And for example, X can be 1, promptly in the steps A 112, only writes down the 1st signal interference ratio of current signal interference ratio of each user and preceding first phase thereof; Judge described in the steps A 2 then whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether the 1st signal interference ratio of judging its current signal interference ratio first phase preceding with it all less than first thresholding that pre-sets, and whether the received signal code power of judging the received signal code power first phase preceding with it that it is current is all less than second thresholding that pre-sets.
And for example, X can be 2, promptly in the steps A 112, only writes down the current signal interference ratio of each user, and the 1st signal interference ratio of preceding first phase, and the 2nd signal interference ratio of preceding two phases; Judge described in the steps A 2 then whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio and its 1st signal interference ratio, the 2nd signal interference ratio all less than first thresholding that pre-sets, and whether the 1st received signal code power, the 2nd received signal code power of judging its current received signal code power X phase preceding with it are all less than second thresholding that pre-sets.
As shown in Figure 2, be specifically described as follows to the SIR method that adopts RSCP and ISCP.
Step 1: SDMA user's set of initial HSDPA is S={1,2 ... N};
Step 2:NodeB periodically obtains RSCP, the ISCP parameter of the PCCPCH channel of each HSDPA excited users, the line time smoothing processing of going forward side by side is to eliminate the violent situation of its momentary fluctuation, it is more common method that time smoothing is handled, just historical smooth value and current instantaneous value are carried out filtering, forgetting factor p determines both contributions to last smooth value.
Step 3: for each user i, if meet the following conditions:
Be lower than certain thresholding Γ 1.Ec/No=RSCP/ISCP continue for some time, this thresholding Γ has characterized the signal quality of signal code chip level, the big more expression quality of signals of Γ value is good more, the easy more original signal information that demodulates, and this thresholding is generally by emulation or actual measurement calibration; And,
Be lower than certain thresholding γ 2.RSCP continue for some time; γ and Γ are similar.
Then the user is got rid of outside the SDMA algorithm, in user's S set with its rejecting, i.e. S=S-{i}, execution in step 4;
For the user
If meet the following conditions:
Be higher than certain thresholding Γ 1.Ec/No=RSCP/ISCP continue for some time; And,
Be higher than certain thresholding γ 2.RSCP continue for some time;
Then the user is incorporated within the SDMA algorithm, in user i adds user set to, i.e. S=S+{i}, execution in step 4, wherein the value of Γ and γ is by system optimization.
Step 4: user's S set that step 3 obtains is carried out the SDMA decision process, and promptly SDMA user selects part, specifically, can adopt various SDMA user's distribution methods of prior art to realize, does not give unnecessary details at this.
Below hypothesis one is implemented environment more specifically, and said method is described.
Suppose 1: suppose to have in the sub-district 4 users, be respectively ue1, ue2, ue3, ue4;
Suppose 2: obtain user i and be designated as respectively: RSCP at instantaneous RSCP and the ISCP of the PCCPCH of current TTI n
i, ISCP
i, historical RSCP ISCP value is designated as RSCP
i(n-1), ISCP
i(n-1);
Suppose 3: the smoothing factor of measurement parameter is p, 0＜p＜1;
The thresholding of supposing 4:RSCP is designated as γ, and the thresholding of Ec/No is designated as Γ:
Step 1: acquisition initial user S set=1,2,3,4};
Step 2: the current smooth value of user i is:
RSCP
i(n)=P*RSCP
i(n-1)+(1-P) RSCP
i, this formula is used for RSCP to user i to carry out time smoothing and handles, and p represents forgetting factor, smoothing factor just, RSCP
i(n-1) the historical smooth value before the expression user i, RSCP
iBe illustrated in the instantaneous RSCP measured value that current TTI is received, at last the RSCP that obtains by this formula
i(n) be current smooth value.
ISCP
i(n)＝p*ISCP
i(n-1)+(1-p)ISCP
i
Step 3: for each user, if user i belongs to S set, when following two conditions satisfy simultaneously:
1.RSCP
i(n)<γ
2.
User i is deleted from S set, just S=S-{i};
If user i does not belong to S set, when following two conditions satisfy simultaneously:
1.RSCP
i(n)>γ
2.
User i is added in S set, just S=S+{i};
Step 4: the subsequent treatment of the user in the S set being carried out SDMA.
For example, report realization the present invention according to the CQI of UE, NodeB judges by CQI being carried out periodic filtering whether the user is in cell edge, if the CQI value is lower for a long time, the quality of reception that the user is described is relatively poor, and channel circumstance is more abominable, just this user is rejected outside the SDMA system.Wherein, each user's of record described in the steps A 1 reporting information specifically may further comprise the steps:
A121, the current channel quality indication of each user of periodic logging, the i.e. current CQI that reports of each user; And the indication of the 1st channel quality of preceding 1 phase, preceding 2 phases to preceding Y phase, the indication of the 2nd channel quality be to the indication of Y-channel quality, and Y is the natural number more than or equal to 1;
Be more preferably, before steps A 121, can also carry out following steps: A120,, pre-set the numerical value of Y according to historical information; Promptly according to actual conditions, perhaps a more suitable Y value is chosen and be provided with to historical record and relevant information thereof, and for example 40,50,70,100,200 or the like.
A122, calculate the Y+1 phase mean value of each user's channel quality indication, i.e. current C QI value and preceding 1 phase CQI value, the preceding 2 phase CQI values mean value of preceding Y phase CQI value extremely is as the current channel quality indicator (CQI) of each user;
And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps:, judge that its current channel quality indicates whether less than the 3rd thresholding that pre-sets to arbitrary user.Wherein, can obtain the span of described the 3rd thresholding, carry out test optimization then in the outfield and obtain described the 3rd thresholding by link simulation.
For example, one preferably example be that described Y value is set to 99, calculate 100 phase mean values of each user's channel quality indication respectively, as the current channel quality indication of each user,, judge that its current channel quality indicates whether less than the 3rd thresholding that pre-sets then to arbitrary user.
And for example, described Y value is set to 50, calculates 51 phase mean values of each user's channel quality indication respectively, as the current channel quality indication of each user, to arbitrary user, judge that its current channel quality indicates whether less than the 3rd thresholding that pre-sets then.
Below, it is as follows to adopt the method for CQI to be specifically described to the present invention.
Step 1: SDMA user's set of initial HSDPA is S={1,2 ... N};
Step 2: certain given time in the cycle CQI that reports to certain user i carry out statistical computation, be expressed as CQI
I, T (n), wherein, CQI
I, T (n)The average that can calculate the CQI of reporting of user in measurement period M * TTI_times obtains; Specifically, CQI
I, T (n)Expression user i, the average CQI value on the individual CQI computing cycle of T (n), wherein n CQI computing cycle of T (n) expression;
Step 3: for each user,
If satisfy condition: CQI
I, T (n)＜CQI
Sdma_threshold
Then the user is got rid of outside the SDMA algorithm, in user's S set with its rejecting, i.e. S=S-{i}, execution in step 4;
If satisfy condition: CQI
I, T (n)〉=CQI
Sdma_threshold
Then the user is incorporated within the SDMA algorithm, in user i adds user set to, i.e. S=S+{i}, execution in step 4.
CQI wherein
Sdma_thresholdValue by system optimization, the acquisition of this value can be obtained by system emulation, such as, by different CQI is set
Sdma_thresholdJudgement is selected more excellent this thresholding of conduct in the difference of identical simulated conditions lower limb user's transmission rate, verifies that by field testing the one-step optimization of going forward side by side obtains then.
Step 4: user's S set that step 3 obtains is carried out the SDMA decision process, specifically same as above.
Below hypothesis one is implemented environment more specifically, and said method is described.
Suppose 1: suppose to have in the sub-district 4 users, be respectively ue1, ue2, ue3, ue4;
Suppose 2: the level and smooth cycle of user's CQI is 100 TTI;
Suppose 3:CQI
Sdma_thresholdBe set to 25;
Step 1: acquisition initial user S set=1,2,3,4};
Step 2: the CQI smooth value of user i is in the computational methods of n computing cycle:
In the measuring period of 100 TTI, supposing has M
I, nInferior CQI reports, and the CQI value that the user i that adds up reported in this cycle obtains CQI
Sum, i, T (n), get final product reporting number of times to ask on average then:
Step 3: for each user, if user i belongs to S set, when following two conditions satisfy simultaneously:
CQI
i，T(n)<CQI
sdma_threshold
User i is deleted from S set, just S=S-{i};
If user i does not belong to S set, when following two conditions satisfy simultaneously:
CQI
i，T(n)>CQI
sdma_threshold
User i is added in S set, just S=S+{i};
Step 4: the subsequent treatment of the user in the S set being carried out SDMA.
Can effectively eliminate the risk of the mis-behave of edge customer in the SDMA system by the inventive method, thereby improve the service satisfaction of the TD-SCDMA HSDPA system of support SDMA edge customer.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1, a kind of space division multiple access guard method of HSDPA system cell edge customer is characterized in that, may further comprise the steps:
A1, obtain the SDMA user profile of sub-district, write down each user's reporting information;
A2, according to each user's reporting information, judge whether arbitrary user is in cell edge, be execution in step A3 then;
A3, gather this user of deletion, and adopt the CDMA mode to transmit data for this user SDMA user.
2, guard method according to claim 1 is characterized in that, steps A 1 also comprises the non-SDMA user profile that obtains the sub-district; And steps A 2 specifically comprises step: according to each user's reporting information, judging whether arbitrary user is in cell edge, is execution in step A30 then, otherwise execution in step A4;
A30, judge whether SDMA user of this user, be execution in step A3 then, otherwise no longer carry out subsequent step;
A4, judge whether SDMA user of this user, otherwise adopt the SDMA mode to transmit data this user.
3, guard method according to claim 1 is characterized in that, each user's of record described in the steps A 1 reporting information specifically may further comprise the steps:
A111, each user's of periodic logging received signal code power and Interference Signal Code Power;
A112, write down the current signal interference ratio of each user;
And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio, and judge that whether its current received signal code power is less than second thresholding that pre-sets less than first thresholding that pre-sets.
4, guard method according to claim 3; it is characterized in that; steps A 111 is further comprising the steps of: to the received signal code power and the Interference Signal Code Power of current acquisition; adopt forgetting factor to carry out time smoothing respectively and handle, as current received signal code power and Interference Signal Code Power.
5, guard method according to claim 3 is characterized in that, obtains the span of described first thresholding, described second thresholding respectively by link simulation, carries out test optimization then in the outfield and obtains described first thresholding and described second thresholding.
6, guard method according to claim 3 is characterized in that, in the steps A 112, also writes down the 1st signal interference ratio of preceding 1 phase of the current signal interference ratio of each user; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether the 1st signal interference ratio of judging its current signal interference ratio first phase preceding with it all less than first thresholding that pre-sets, and whether the received signal code power of judging the received signal code power first phase preceding with it that it is current is all less than second thresholding that pre-sets.
7, guard method according to claim 3 is characterized in that, in the steps A 112, also writes down the 1st signal interference ratio, the 2nd signal interference ratio to the X signal interference ratio of the preceding X phase of the current signal interference ratio of each user, and X is the integer greater than 1; And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps: to arbitrary user, whether judge its current signal interference ratio and its 1st signal interference ratio to the X signal interference ratio all less than first thresholding that pre-sets, and judge its current received signal code power 1 phase preceding with it to the 1st received signal code power to the X received signal code power of preceding X phase whether all less than second thresholding that pre-sets.
8, guard method according to claim 1 is characterized in that, each user's of record described in the steps A 1 reporting information specifically may further comprise the steps:
A121, the current channel quality indication of each user of periodic logging, and the 1st channel quality of preceding Y phase is indicated, the indication of the 2nd channel quality is indicated to the Y-channel quality, Y is the integer more than or equal to 1;
A122, calculate the Y+1 phase mean value of each user's channel quality indication, as the current channel quality indication of each user;
And, judge described in the steps A 2 whether arbitrary user is in cell edge, specifically may further comprise the steps:, judge that its current channel quality indicates whether less than the 3rd thresholding that pre-sets to arbitrary user.
9, guard method according to claim 8 is characterized in that, obtains the span of described the 3rd thresholding by link simulation, carries out test optimization then in the outfield and obtains described the 3rd thresholding.
10, guard method according to claim 8 is characterized in that, also carries out following steps: A120 before the steps A 121, according to historical information, pre-sets the numerical value of Y.
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| CN102104949A (en) * | 2009-12-21 | 2011-06-22 | 大唐移动通信设备有限公司 | Space division method, system and equipment for dedicated physical channel (DPCH) |
| CN102958181A (en) * | 2011-08-29 | 2013-03-06 | 鼎桥通信技术有限公司 | High speed downlink packages access user scheduling method and base station |
| CN103841630A (en) * | 2012-11-26 | 2014-06-04 | 中兴通讯股份有限公司 | Method and device for controlling user equipment |
| CN102970685B (en) * | 2009-08-20 | 2015-03-25 | 电信科学技术研究院 | Method and device for performing space division multiple access user grouping |
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2007
- 2007-10-22 CN CNA2007101241397A patent/CN101420733A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102970685B (en) * | 2009-08-20 | 2015-03-25 | 电信科学技术研究院 | Method and device for performing space division multiple access user grouping |
| CN102104949A (en) * | 2009-12-21 | 2011-06-22 | 大唐移动通信设备有限公司 | Space division method, system and equipment for dedicated physical channel (DPCH) |
| CN102104949B (en) * | 2009-12-21 | 2013-11-06 | 电信科学技术研究院 | Space division method, system and equipment for dedicated physical channel (DPCH) |
| CN101835162A (en) * | 2010-01-12 | 2010-09-15 | 工业和信息化部电信传输研究所 | Networking scheduling method and device in application process of different time slot proportions in different cells |
| CN101835162B (en) * | 2010-01-12 | 2013-06-05 | 工业和信息化部电信传输研究所 | Networking scheduling method and device in application process of different time slot proportions in different cells |
| CN102958181A (en) * | 2011-08-29 | 2013-03-06 | 鼎桥通信技术有限公司 | High speed downlink packages access user scheduling method and base station |
| CN102958181B (en) * | 2011-08-29 | 2015-05-20 | 鼎桥通信技术有限公司 | High speed downlink packages access user scheduling method and base station |
| CN103841630A (en) * | 2012-11-26 | 2014-06-04 | 中兴通讯股份有限公司 | Method and device for controlling user equipment |
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