CN101499849B - Method and apparatus for configuring protection interval - Google Patents
Method and apparatus for configuring protection interval Download PDFInfo
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- CN101499849B CN101499849B CN 200810057319 CN200810057319A CN101499849B CN 101499849 B CN101499849 B CN 101499849B CN 200810057319 CN200810057319 CN 200810057319 CN 200810057319 A CN200810057319 A CN 200810057319A CN 101499849 B CN101499849 B CN 101499849B
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Abstract
The invention discloses a GP configuring method, which comprises the following steps: a GP of a first base station is configured; a GP cut-off time of a second base station is determined according to the requirement of being larger or equal to an effective GP cut-off time of the first base station; a GP length of the second base station is determined according to the requirement of being larger or equal to an inter-station delay threshold of the second base station; a GP starting time of the second base station is determined according to the effective GP cut-off time of the first base station and the GP length of the second base station; and a GP of the second base station is configured according to the GP cut-off time and the GP starting time of the second base station. The invention further discloses a GP configuring device. By adopting the GP configuring method and the GP configuring device in a TDD system with flexibly configurable GP, GP between different base stations can be coordinated and configured, and consequently interference of uplinks and downlinks between cells can be avoided.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to method and a kind of device for GP configuring of a kind of configuration protection interval (Guard Period, GP) in the moving communicating field.
Background technology
TD SDMA (TD-SCDMA) technology is one of 3G (Third Generation) Moblie air interface technologies standard of the formal issue of International Telecommunications Union, and its key technology mainly comprises Time division duplex, intelligent antenna technology and the associated detection technique of capable of regulating up-downgoing switching point.The advantage outstanding behaviours of TD-SCDMA technology has obtained good equilibrium, there have been good sustainable development and technology evolution in efficient support, the system self of mixed service between system rejection to disturbance and power system capacity.
TD-SCDMA technology adopts time division duplex (TDD) working method do not need pair frequency, and its downlink information and uplink information are that the different time-gap at same carrier frequency transmits.The frame structure of TD-SCDMA system is divided into the radio frames of 10 milliseconds (ms) subframe of two 5ms.Fig. 1 shows the structure of each subframe, and each subframe comprises 7 conventional time slots and 3 special time slots.Three special time slots are respectively descending pilot frequency time slot (DwPTS), GP and uplink pilot time slot (UpP TS).In 7 conventional time slots, time slot TS0 always distributes to down link, and time slot TS1 always distributes to up link, is separated by transfer point between ascending time slot and the descending time slot.In the TD-SCDMA system, each subframe has two transfer points: first transfer point is to forward up link to from down link, the GP of position between DwPTS and UpPTS; Second transfer point is to forward down link to from up link, and the position is in each subframe between last ascending time slot and second descending time slot.
Except the TD-SCDMA system, in different technology, correspondingly there is at present different TDD systems, the UTRA TDD system in the WCDMA technology for example, the tdd mode in Long Term Evolution (LTE) scheme, and the TDD system in the WiMAX technology etc.
Although the configuration of the GP in the TD-SCDMA system is fixed, the position must be between DwPTS and the UpPTS, length is necessary for 75 microseconds (us), but not every TDD system all is fixed configurations GP, can be according to demand flexible configuration GP such as coverings, such as LTE TDD system in some TDD system.How GP configuring just can avoid the interference of minizone uplink downlink to consider in these can the TDD system of flexible configuration GP so.But, a kind of method of clear and definite coordination GP configuring is not yet arranged at present.
Summary of the invention
In view of this, the technical problem that the present invention solves provides a kind of method of clear and definite GP configuring, can adopt the method GP configuring can avoid the interference of minizone uplink downlink in the TDD system of flexible configuration GP.
For this reason, technical scheme provided by the invention is as follows:
A kind of method of GP configuring comprises:
Configure the GP of the first base station;
By the GP cut-off time of determining the second base station more than or equal to the requirement of effective GP cut-off time of the first base station, effective GP cut-off time of described the first base station refers to from delaying the moment after the threshold value between the GP initial time of described the first base station postpones the station of described the first base station, delay threshold value between the station of described the first base station and refer to the signal propagation first stop spacing needed time of threshold value, described first stop spacing threshold value refers to that the downstream signal of described the first base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance, and the GP initial time of described the first base station refers to that described the first base station stops to launch the moment of downstream signal;
Determine the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station;
Determine the GP initial time of the second base station according to the GP length of effective GP cut-off time of the first base station and the second base station;
The GP that configures the second base station by GP cut-off time and the GP initial time of described the second base station.
In certain embodiments, when the first base station and the second base station are the base station of different TDD system, further comprise:
When the GP of configuration the second base station, configure the timer clock of the second base station by the timer clock of the first base station.
Preferably, by calculating t
Ref_s=t
Ref_1+ T
RefObtain effective GP cut-off time t of the first base station
Ref_s
Wherein, t
Ref_1The GP zero hour of the first base station of configuration, T
RefTo delay threshold value between the station of the first base station.
Preferably, by calculating t
1=t
Ref_s-T
GPDetermine the GP initial time t of the second base station
1
Wherein, t
Ref_sThe effective GP cut-off time of the first base station, T
GPThe GP length of the second base station.
Preferably, determine the GP length of the first base station by the requirement of delaying threshold value between the station more than or equal to the first base station.
The present invention proposes the method at another kind of configuration protection interval, comprising:
Configure the GP of the first base station;
Determine the GP cut-off time of the second base station by GP cut-off time of the first base station of configuration;
Determine the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station, delay threshold value between the station of described the second base station and refer to that signal propagates the second station spacing needed time of threshold value, described second station spacing threshold value refers to that the downstream signal of described the second base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance;
The GP initial time of determining the second base station according to GP cut-off time and the GP length of the second base station;
The GP that configures the second base station by GP cut-off time and the GP initial time of described the second base station.
In certain embodiments, when the first base station is the base station of different TDD systems with the second base station, further comprise:
When the GP of configuration the second base station, configure the timer clock of the second base station by the timer clock of the first base station.
Preferably, by calculating t
1=t
2-T
GP, determine the GP initial time t of the second base station
1
Wherein, t
2The GP cut-off time of the second base station, T
GPThe GP length of the second base station.
Preferably, determine the GP length of the first base station by the requirement of delaying threshold value between the station more than or equal to the first base station.
Topic provides a kind of device for the configuration protection interval between another technology that the present invention will solve, comprise the input unit for the information that receives outside input, output unit with being used for exporting described GP cut-off time and GP initial time also comprises first module, second unit, Unit the 3rd and Unit the 4th;
The information that described input unit receives comprises: the protection interval GP initial time t of the first base station of configuration
Ref_1, the first base station the station between delay threshold value T
RefAnd delay threshold value T between the station of the second base station
GPDelay threshold value between the station of described the first base station and refer to the signal propagation first stop spacing needed time of threshold value, described first stop spacing threshold value refers to that the downstream signal of described the first base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance, delay threshold value between the station of described the second base station and refer to that signal propagates the second station spacing needed time of threshold value, described second station spacing threshold value refers to that the downstream signal of described the second base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance;
Described first module is by calculating t
Ref_s=t
Ref_1+ T
Ref, obtain effective GP cut-off time t of the first base station
Ref_sEffective GP cut-off time of described the first base station refers to that the GP initial time of described the first base station refers to that described the first base station stops to launch the moment of downstream signal from delaying the moment after the threshold value between the GP initial time of described the first base station postpones the station of described the first base station;
Described second unit was used for by the GP cut-off time of determining the second base station more than or equal to the requirement of effective GP cut-off time of the first base station;
Described Unit the 3rd is used for determining by the requirement of delaying threshold value between the station more than or equal to the second base station the GP length of the second base station;
Described Unit the 4th is by calculating t
1=t
Ref_s-T
GP, determine the GP initial time t of the second base station
1
Another kind provided by the invention is used for the device at configuration protection interval, comprises the input unit for the information that receives outside input, and is used for exporting the output unit of described GP cut-off time and GP initial time, also comprises Unit the 3rd and Unit the 6th;
The information that described input unit receives comprises: the protection interval GP cut-off time t of the first base station of configuration
2And delay threshold value between the station of the second base station;
Described Unit the 3rd is used for determining by the requirement of delaying threshold value between the station more than or equal to the second base station the GP length T of the second base station
GP
Described Unit the 6th is by calculating t
1=t
2-T
GP, determine the GP initial time t of the second base station
1
Can find out, owing to by the GP cut-off time of determining the second base station more than or equal to the requirement of effective GP cut-off time of the first base station, therefore can make the second base station in the interference of when down link is transformed into up link, avoiding being subject to the first base station.And, owing to determining the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station, therefore can make the first base station in the interference of when down link is transformed into up link, avoiding being subject to the second base station.Adopting method and apparatus provided by the invention in the TDD system of flexible configuration GP, can coordinate to configure the GP between the different base station, thereby avoid the interference of minizone uplink downlink.
Description of drawings
Fig. 1 is the subframe structure schematic diagram of existing TD-SCDMA system;
Fig. 2 is the schematic diagram that disturbs between the adjacent base station;
Fig. 3 is the method flow diagram of a kind of GP configuring provided by the invention;
Fig. 4 is the schematic diagram of avoiding the minizone uplink downlink to disturb at one;
Fig. 5 is the method flow diagram of another kind of GP configuring provided by the invention;
Fig. 6 adopts the present invention can obtainable a kind of GP configuration schematic diagram;
Fig. 7 is a kind of device schematic diagram for GP configuring provided by the invention;
Fig. 8 is the device schematic diagram that another kind provided by the invention is used for GP configuring.
Embodiment
One can the TDD system of flexible configuration GP in, the GP position of each base station is probably not identical with GP length.If do not consider to coordinate to configure the GP of each base station, probably exist serious uplink downlink to disturb between these base stations.
As shown in Figure 2, suppose that base station A and base station B are adjacent base station, the actual pitch of base station A and base station B is d.When system moved, base station A was at moment t
A1Stop to launch downstream signal and at moment t
A2Begin to receive upward signal, base station B is at moment t
B1Stop to launch downstream signal and at moment t
B2Begin to receive upward signal.Can find out, the GP start-stop position of base station A is moment t
A1, t
A2, the GP length T
GP_1Be t
A2-t
A1, the GP start-stop position of base station B is moment t
B1, t
B2, the GP length T
GP_2Be t
B2-t
B1
Base station B is at moment t
B2If receive afterwards the downstream signal that base station A sends, then can be subject to the interference of base station A.Can find out, if the downstream signal of base station A emission is from moment t
A1To moment t
B2That propagates is not more than the spacing d of base station A, base station B apart from S, i.e. S≤d is then at moment t
B2The downstream signal of base station A emission not yet arrives base station B, and base station B is at moment t
B2After a certain moment will receive the downstream signal that base station A sends; If S＞d is then at moment t
B2The downstream signal of base station A emission is through base station B, and base station B is at moment t
B2After can not receive the downstream signal that base station A sends, just can not be subject to the interference of base station A yet.Wherein, S=(t
B2-t
A1) * C, C are the speed that signal is propagated.
But, also have a kind of situation of explanation that needs to be, in the situation that S≤d, if the downstream signal of base station A emission has been decayed behind propagation distance S a lot, in the time of can ignoring on the impact of base station B, can think that then base station B is not subject to the interference of base station A.Can introduce " station spacing threshold value " this concept here.The station spacing threshold value is the concept of a distance, and the station spacing threshold value is not the actual distance that refers between the base station, and the downstream signal that refers to the emission of this base station decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance.Corresponding to the station spacing threshold value, can also introduce " delaying threshold value between standing " this concept.Delay threshold value between so-called station and refer to, signal is propagated the so long needed time of distance of station spacing threshold value.If represent the station spacing threshold value with D, represent the propagation velocity of signal with C, represent to delay threshold value between the station with T, then T=D/C.
The factors such as the maximum transmit power of definite and this base station of station spacing threshold value, the wireless environment of signal transmission and the antenna height between this base station and the adjacent base station are poor are relevant.Generally speaking, the maximum transmit power of base station is larger, the environment of signal transmission is better, antenna height is poor less, and needed station spacing threshold value is larger.So, consider actual base station deployment environment, any one base station is all different for the station spacing threshold value of other any one base station, and this is because be difficult to guarantee that the above-mentioned factor between any two base stations is identical.Like this, when determining the station spacing threshold value of a base station, need to choose this base station with respect to a station spacing threshold value as this base station of the maximum in a plurality of station spacing threshold values of other a plurality of adjacent base stations.The station spacing threshold value of each base station can be used as a parameter and is kept in each base station.When the physical parameter (such as maximum transmit power or antenna height) of some base stations changes or wireless environment when changing, can redefine and upgrade the station spacing threshold value of this base station.
Definition and Fig. 2 of combining station spacing threshold value can find out, base station A has a station spacing threshold value D
A, base station B also has a station spacing threshold value D
BIf the spacing d of base station A and base station B is both greater than D
AAlso greater than D
B, then base station A and base station B can not exist uplink downlink to disturb each other; If the spacing d of base station A and base station B is greater than D
ABut less than D
B, then base station A can interference base station B, but base station B may interference base station A.In like manner, if the spacing d of base station A and base station B less than D
ABut greater than D
B, then base station A may interference base station B, but base station B can interference base station A.
By above-mentioned analysis as can be known, for two base stations, when the station spacing threshold value of base station less than between two base stations apart from the time, then can greatly reduce even avoid the uplink downlink between the base station to disturb; But when the distance between two base stations during less than the station spacing threshold value of base station, the possibility that then exists uplink downlink to disturb.
Here need to prove, delay threshold value and can be kept in the different entities according to actual conditions between the station spacing threshold value of base station and station.For example, can be kept at the base station with delaying threshold value between the station spacing threshold value of base station and station, also can be kept at base station controller, also can be kept at operation maintenance center.
To a plurality of base stations GP configuring in the TDD system time, should be first the GP of a base station be configured, then coordinate the GP of other base station of configuration as the GP configuring condition of this base station of reference with this base station.Here, the base station as benchmark can be called the first base station, other base station is called the second base station.
For making those skilled in the art understand better the present invention, specify below in conjunction with the method for specific embodiment to GP configuring provided by the invention.It is the flow process of GP configuring that Fig. 4 shows a kind of.
In step 301, configure the GP of the first base station.
When the GP to the first base station is configured, need to consider to avoid the uplink downlink of minizone to disturb.For this reason, in the GP length T of determining the first base station
GP_refThe time, should satisfy T
GP_ref〉=T
RefThis requirement.Wherein, T
RefTo delay threshold value, T between the station of the first base station
Ref=D
Ref/ C, D
RefIt is the station spacing threshold value of the first base station.
When determining the GP position of the first base station, should decide on concrete condition and specific requirement.Here adopt respectively t
Ref_1And t
Ref_2Initial time and the cut-off time of expression GP, wherein t
Ref_2=t
Ref_1+ T
GP_ref
After finishing the GP configuration of the first base station, the second base station should according to the GP configuring condition of the first base station and the station spacing threshold value of the second base station, configure its GP.
In step 302, with the GP cut-off time as the second base station GP cut-off time of the first base station of configuration.
If adopt t
2Represent the GP cut-off time of the second base station, then should make t
2=t
Ref_2
In step 303, determine the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station.
If adopt T
GPRepresent the GP length of the second base station, use T
bRepresent to delay threshold value between the station of the second base station, then should satisfy T
GP〉=T
bWherein, T
b=D
b/ C, D
bIt is the station spacing threshold value of the second base station.
In step 304, according to the GP cut-off time of the second base station, the GP initial time t that GP length is determined the second base station
1, namely by calculating t
1=t
2-T
GPDetermine the GP initial time t of the second base station
1
In step 305, by the initial time t of the second base station of determining
1With cut-off time t
2Configure the GP of the second base station.
Below in conjunction with TDD system shown in Figure 4, specifically should be used as more specific description to above-described embodiment.
When the GP of configurating base station A, base station B and base station C, can choose a base station wantonly as the first base station.Here select base station B as the first base station.
Press T
GP_B〉=T
BThe GP length T of base station B is determined in this requirement
GP_BAfter, determine as the case may be again the GP initial time t of base station B
B_1With GP cut-off time t
B_2, GP that then just can configurating base station B.Wherein, T
BTo delay threshold value, T between the station of base station B
B=D
B/ C, D
BIt is the station spacing threshold value of base station B.
When the GP of configurating base station A and base station C, with the GP cut-off time t of base station B
B_2Cut-off time t as base station A
A_2GP cut-off time t with base station C
C_2, then press T
GP_A〉=T
AThe GP length T of base station A is determined in this requirement
GP_A, press T
GP_C〉=T
CThe GP length T of base station C is determined in this requirement
GP_CWherein, T
ATo delay threshold value, T between the station of base station A
CTo delay threshold value between the station of base station C.At last, by calculating t
A_1=t
A_2-T
GP_AAnd t
C_1=t
C_2-T
GP_C, determine respectively the GP initial time t of base station A
A_1GP initial time t with base station C
C_1
When determining the GP of base station A and base station C, can be all with base station B as the first base station.Also can determine first the GP of base station A with base station B as the first base station, then determine the GP of base station C with base station A as the first base station.That is to say, for the second base station of GP configuring not yet, can determine GP as benchmark in certain specific base station, also can be in each base station of GP configuring choosing then one determine GP as benchmark.No matter adopt which kind of mode, last GP configuration result all is the same.
Base station A is at moment t
A_1Stop to launch downstream signal and at moment t
A_2Begin to receive upward signal, base station B is at moment t
B_1Stop to launch downstream signal and at moment t
B_1Begin to receive upward signal, base station C is at moment t
C_1Stop to launch downstream signal and at moment t
C_2Begin to receive upward signal, wherein t
A_2=t
B_2=t
C_2
Can find out, if the downstream signal of base station A emission is from moment t
A_1To moment t
B_2That propagates is not more than the spacing d of base station A, base station B apart from S, i.e. S≤d is then at moment t
B_2The downstream signal of base station A emission not yet arrives base station B, and base station B is at moment t
B_2After a certain moment will receive the downstream signal that base station A sends.Here because S=(t
B_2-t
A_1) * C=(t
A_2-t
A_1) * C=T
GP_A* C, and T
GP_A* C 〉=D
A, D
AIt is the station spacing threshold value of base station A.Therefore, even if base station B can receive the downstream signal that base station A sends, but that this downstream signal has been decayed when arriving base station B is a lot, in the time of can ignoring on the impact of base station B, can think that then base station B is not subject to the interference of base station A.
If S＞d is then at moment t
B_2The downstream signal of base station A emission is through base station B, and base station B is at moment t
B_2After can not receive the downstream signal that base station A sends, just can not be subject to the interference of base station A yet.
In like manner, if the downstream signal of base station B emission from moment t
B_1To moment t
A_2That propagates is not more than the spacing d of base station A, base station B apart from S ', i.e. S '≤d is then at moment t
A_2The downstream signal of base station B emission not yet arrives base station A, and base station A is at moment t
A_2After a certain moment will receive the downstream signal that base station B sends.Here because S '=(t
A_2-t
B_1) * C=(t
B_2-t
B_1) * C=T
GP_B* C, and T
GP_B* C 〉=D
B, D
BIt is the station spacing threshold value of base station B.Therefore, even if base station A can receive the downstream signal that base station B sends, but that this downstream signal has been decayed when arriving base station A is a lot, in the time of can ignoring on the impact of base station A, can think that then base station A is not subject to the interference of base station B.
If S '＞d is then at moment t
A_2The downstream signal of base station B emission is through base station A, and base station A is at moment t
A_2After can not receive the downstream signal that base station B sends, just can not be subject to the interference of base station B yet.
Adopt above-mentioned analytic process to learn, the uplink downlink between base station A and the base station C disturbs and also will reduce even eliminate.In like manner, the uplink downlink between base station B and the base station C disturbs and also will reduce even eliminate.
Can find out, adopt the described method of above-described embodiment can by coordinating the GP between the configuration different base station, avoid the interference of uplink downlink between the base station fully.
In last embodiment, the GP cut-off time of each base station configuration, namely actual GP cut-off time is identical, and in fact GP cut-off time of each base station configuration also can be different.Be explained below in conjunction with another embodiment, Fig. 5 shows the flow process that another kind is GP configuring.
In step 501, configure the GP of the first base station.
In step 502, according to the effective GP cut-off time that postpones threshold calculations the first base station between the GP initial time of the first base station and station.
By calculating t
Ref_s=t
Ref_1+ T
Ref, namely can obtain effective GP cut-off time t of the first base station
Ref_sDescribed effective GP cut-off time refers to, postpones to delay between the station moment after the threshold value rather than the GP cut-off time of configuration from the GP initial time.
Here also need to prove, GP cut-off time of configuration is all more than or equal to effective GP cut-off time, that is, and and t
Ref_2〉=t
Ref_s
In step 503, with the effective GP cut-off time as the second base station effective GP cut-off time of the first base station, and by the GP cut-off time of determining the second base station more than or equal to the requirement of this effective GP cut-off time.
If adopt t
2Represent the GP cut-off time of the second base station, then should make t
2〉=t
Ref_s
In step 504, determine the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station.
In step 505, the GP initial time t that determines the second base station according to effective GP cut-off time and the GP length of the second base station
1By calculating t
1=t
Ref_s-T
GPCan determine the GP initial time t of the second base station
1
In step 506, by the start-stop moment t of the second base station of determining
1With cut-off time t
2Configure the GP of the second base station.
Still specifically should be used as more specific description in conjunction with Fig. 4 to last embodiment.
When the GP of configurating base station A, base station B and base station C, can choose a base station wantonly as the first base station.Here select base station B as the first base station.
Press T
GP_B〉=T
BThe GP length T of base station B is determined in this requirement
GP_BAfter, determine as the case may be again the GP initial time t of base station B
B_1With GP cut-off time t
B_2, GP that then just can configurating base station B.
When the GP of configurating base station A and base station C, with effective GP cut-off time t of base station B
B_2SEffective cut-off time t as base station A
A_2SEffective GP cut-off time t with base station C
C_2S, and press t
A_2〉=t
A_2S, t
C_2〉=t
C_2SRequirement determine respectively GP cut-off time of base station A, base station C.
Then press T
GP_A〉=T
AThe GP length T of base station A is determined in this requirement
GP_A, press T
GP_C〉=T
CThe GP length T of base station C is determined in this requirement
GP_CAt last, by calculating t
A_1=t
A_2S-T
GP_AAnd t
C_1=t
C_2S-T
GP_C, determine respectively the GP initial time t of base station A
A_1GP initial time t with base station C
C_1
When determining the GP of base station A and base station C, can be all with base station B as the first base station.Also can determine first the GP of base station A with base station B as the first base station, then determine the GP of base station C with base station A as the first base station.That is to say, for the second base station of GP configuring not yet, can determine GP as benchmark in certain specific base station, also can be in each base station of GP configuring choosing then one determine GP as benchmark.No matter adopt which kind of mode, last GP configuration result all is the same.
The GP configuring condition of base station A, base station B and base station C may be as shown in Figure 6.
Base station A is at moment t
A_1Stop to launch downstream signal and at moment t
A_2Begin to receive upward signal, base station B is at moment t
B_1Stop to launch downstream signal and at moment t
B_1Begin to receive upward signal, base station C is at moment t
C_1Stop to launch downstream signal and at moment t
C_2Begin to receive upward signal, wherein t
A_2S=t
B_2S=t
C_2S
Can find out, if the downstream signal of base station A emission is from moment t
A_1To moment t
B_2That propagates is not more than the spacing d of base station A, base station B apart from S, i.e. S≤d is then at moment t
B_2The downstream signal of base station A emission not yet arrives base station B, and base station B is at moment t
B_2After a certain moment will receive the downstream signal that base station A sends.Here because S=(t
B_2-t
A_1) * C 〉=(t
B_2S-t
A_1) * C=(t
A_2S-t
A_1) * C=D
ATherefore, even if base station B can receive the downstream signal that base station A sends, but that this downstream signal has been decayed when arriving base station B is a lot, in the time of can ignoring on the impact of base station B, can think that then base station B is not subject to the interference of base station A.
If S＞d is then at moment t
B_2The downstream signal of base station A emission is through base station B, and base station B is at moment t
B_2After can not receive the downstream signal that base station A sends, just can not be subject to the interference of base station A yet.
In like manner, if the downstream signal of base station B emission from moment t
B_1To moment t
A_2That propagates is not more than the spacing d of base station A, base station B apart from S ', i.e. S '≤d is then at moment t
A_2The downstream signal of base station B emission not yet arrives base station A, and base station A is at moment t
A_2After a certain moment will receive the downstream signal that base station B sends.Here because S '=(t
A_2-t
B_1) * C 〉=(t
A_2S-t
B_1) * C=(t
B_2S-t
B_1) * C=D
BTherefore, even if base station A can receive the downstream signal that base station B sends, but that this downstream signal has been decayed when arriving base station A is a lot, in the time of can ignoring on the impact of base station A, can think that then base station A is not subject to the interference of base station B.
If S '＞d is then at moment t
A_2The downstream signal of base station B emission is through base station A, and base station A is at moment t
A_2After can not receive the downstream signal that base station B sends, just can not be subject to the interference of base station B yet.
Adopt above-mentioned analytic process to learn, the uplink downlink between base station A and the base station C disturbs and also will reduce even eliminate.In like manner, the uplink downlink between base station B and the base station C disturbs and also will reduce even eliminate.
No matter be first embodiment or second embodiment, when determining the GP of each base station, all will at first configure the GP of the first base station, then determine the GP cut-off time of the second base station with reference to the GP of the first base station; Then determine the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station, and determine the GP initial time of the second base station according to described GP cut-off time and GP length; At last by described GP cut-off time and the unified GP that configures the second base station of GP initial time.
The main difference of these two embodiment is, determines that the mode of GP cut-off time of the second base station is different.In first embodiment, directly determine the GP cut-off time of the second base station by GP cut-off time of the first base station of configuration, and be effective GP cut-off time of determining the second base station with effective GP cut-off time of the first base station, and then determine the GP cut-off time of the second base station according to effective GP cut-off time of the second base station in second embodiment.Although the mode in GP cut-off time of determining the second base station exists different, but can find out that these two embodiment have a total design at the GP that determines the second base station during cut-off time, make exactly each base station all be converted to up link in the same moment, or in actual GP cut-off time, or in effective GP cut-off time.
In actual applications, adopt first embodiment, its processing procedure is simpler, but GP cut-off time of each base station all be subject to the restriction of the first base station, can't configure more neatly the GP position of each base station; Adopt second embodiment, its processing procedure relative complex, but can configure more neatly the GP position of each TDD system.
In the network planning stage, utilize the described method of the various embodiments described above can coordinate to configure the GP of each base station, thereby at the beginning of network design, namely can reduce even avoid the uplink downlink of minizone to disturb.
Another applicable cases is to have arranged a kind of TDD network system in some zones, but need to arrange another kind of TDD network system in this zone again.At this moment, formerly the base station in the TDD system is as the first base station, is configured in the GP of each base station in the rear TDD system by the method for above-described embodiment.Adopt the method for the various embodiments described above not only can avoid the uplink downlink of minizone to disturb, can also avoid the uplink downlink between system to disturb.For avoiding the uplink downlink between system to disturb, not only to coordinate the GP that configuration belong to the base station of different TDD system by the method for above-described embodiment, also to guarantee Complete Synchronization between each TDD system, identical timer clock is all adopted in the base station that namely should guarantee each TDD system, and that is to say should be with the timer clock of the first base station timer clock as each the second base station.
The present invention also provides a kind of device for GP configuring, and the below does device provided by the invention and specifies.Fig. 7 shows a kind of device 700 for GP configuring, this device 700 comprises the input unit S75 for the information that receives outside input, output unit S76 with being used for exporting described GP cut-off time and GP initial time also comprises first module S71, second unit S72, the 3rd cell S 73 and the 4th cell S 74.
The information that input unit S75 receives comprises: the GP initial time t of the first base station of configuration
Ref_1, the first base station the station between delay threshold value T
Ref, the second base station the station between delay threshold value and other relevant control order and parameter.
According to the information that input unit S75 receives, first module S71 calculates t
Ref_s=t
Ref_1+ T
RefCan obtain effective GP cut-off time t of the first base station
Ref_s
According to the result that first module S71 calculates, second unit S72 is by the effective GP cut-off time t more than or equal to the first base station
Ref_sRequirement determine the GP cut-off time t of the second base station
2
According to the information that input unit S75 receives, the 3rd cell S 73 is determined the GP length T of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station
GP
The GP length T that the result who calculates according to first module S71 and the 3rd cell S 73 are determined
GP, the 4th cell S 74 is by calculating t
1=t
Ref_s-T
GP, can determine the GP initial time t of the second base station
1
The GP cut-off time t of the second base station that output unit S76 is definite with second unit S72
2Calculate the GP initial time t of the second base station that obtains with the 4th cell S 74
1Output.
According to the result of output unit S76 output, namely can configure the GP of the second base station.
Fig. 8 shows the another kind of device 800 that is used for GP configuring, this device 800 comprises the input unit S75 for the information that receives outside input, output unit S76 with being used for exporting described GP cut-off time and GP initial time also comprises the 3rd cell S 73 and the 6th cell S 81;
The information that input unit S75 receives comprises: the GP cut-off time t of the first base station of configuration
2, the second base station the station between delay threshold value and other relevant control order and parameter.
According to the information that input unit S75 receives, the 3rd cell S 73 is determined the GP length T of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station
GP
According to the information that input unit S75 receives, the 6th cell S 81 is by calculating t
1=t
2-T
GPCan determine the GP initial time t of the second base station
1
Output unit S76 is with the GP cut-off time t of the first base station of input unit S75 reception
2GP cut-off time as the second base station exports, and the 6th cell S 81 is calculated the GP initial time t of the second base station that obtains
1Output.
According to the result of output unit S76 output, namely can configure the GP of the second base station.
In the network planning stage, utilize Fig. 7 or device shown in Figure 8 can coordinate to configure the GP of each base station, thereby at the beginning of network design, namely can reduce even avoid the uplink downlink of minizone to disturb.
Another applicable cases is to have arranged a kind of TDD network system in some zones, but need to arrange another kind of TDD network system in this zone again.At this moment, formerly the base station in the TDD system is as the first base station, utilizes said apparatus to be configured in the GP of each base station in the rear TDD system.For avoiding the uplink downlink between system to disturb, when adopting the said apparatus configuration to belong to the GP of base station of different TDD system, also to guarantee Complete Synchronization between each TDD system, should guarantee that namely identical timer clock is all adopted in the base station of each TDD system.
Fig. 7 or device shown in Figure 8 can be products independently, also can be arranged in operation maintenance center, base station controller or the base station, thereby organically be combined with existing system, equipment.The information that input unit S75 receives both can be the information that operating personnel input, and also can be the information from miscellaneous equipment.For example, when device was arranged in the second base station of GP configuring not yet, this second base station obtains the first base station from the first base station GP start-stop can send to input unit S75 with the information that obtains constantly and after delaying threshold value between the station.The result of output unit S76 output both can export to operating personnel, carried out follow-up configuration by operating personnel, also can send to other processing unit, carried out follow-up processing configuration by other processing unit.
Those skilled in the art can understand, the various exemplary method step of describing in conjunction with the disclosed embodiments here and device unit all can electronic hardware, software or the combination of the two realize.In order to be clearly shown that the interchangeability between the hardware and software, above various exemplary steps and unit are all carried out generally description with its functional form.This functional be to realize or realize depending on the design constraint that specific application and whole system are realized with software with hardware.Those skilled in the art can be for each specific application, realize in many ways described functional, but the result of this realization should not be construed as and on the contrary deviates from scope of the present invention.
Utilize general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logical device, discrete gate or transistor logic, discrete hardware components or the combination in any among them, can realize or carry out the various exemplary unit of describing in conjunction with embodiment disclosed herein.General processor may be microprocessor, but in another kind of situation, this processor may be processor, controller, microcontroller or the state machine of any routine.Processor also may be implemented as the combination of computing equipment, for example, and the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessor or any other this kind structure in conjunction with the DSP core.
In conjunction with the step of the described method of above-mentioned disclosed embodiment can directly be presented as hardware, the software module carried out by processor or the combination of these two.Software module may be present in the storage media of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, mobile disk, CD-ROM or any other form well known in the art.The coupling of a kind of exemplary storage medium and processor, thereby so that processor can be from this storage media read message, and can be to this storage media write information.In replacing example, storage media is the part of processor.Processor and storage media may be present among the ASIC.This ASIC may be present in the subscriber station.Replace in the example at one, the discrete assembly that processor and storage media can be used as in the subscriber station exists.
According to described disclosed embodiment, can be so that those skilled in the art can realize or use the present invention.To those skilled in the art, the various modifications of these embodiment are apparent, and the general principles of definition here also can be applied to other embodiment on the basis that does not depart from the scope of the present invention with purport.Above-described embodiment only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the method at a configuration protection interval is characterized in that, comprising:
Configure the protection interval GP of the first base station;
By the GP cut-off time of determining the second base station more than or equal to the requirement of effective GP cut-off time of the first base station, effective GP cut-off time of described the first base station refers to from delaying the moment after the threshold value between the GP initial time of described the first base station postpones the station of described the first base station, delay threshold value between the station of described the first base station and refer to the signal propagation first stop spacing needed time of threshold value, described first stop spacing threshold value refers to that the downstream signal of described the first base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance, and the GP initial time of described the first base station refers to that described the first base station stops to launch the moment of downstream signal;
Determine the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station;
Determine the GP initial time of the second base station according to the GP length of effective GP cut-off time of the first base station and the second base station;
The GP that configures the second base station by GP cut-off time and the GP initial time of described the second base station.
2. the method for claim 1 is characterized in that, when the first base station is the base station of different TDD systems with the second base station, further comprises:
When the GP of configuration the second base station, configure the timer clock of the second base station by the timer clock of the first base station.
3. method as claimed in claim 1 or 2 is characterized in that, by calculating t
Ref_s=t
Ref_1+ T
RefObtain effective GP cut-off time t of the first base station
Ref_s
Wherein, t
Ref_1The GP initial time of the first base station of configuration, T
RefTo delay threshold value between the station of the first base station.
4. method as claimed in claim 1 or 2 is characterized in that, by calculating t
1=t
Ref_s-T
GPDetermine the GP initial time t of the second base station
1
Wherein, t
Ref_sThe effective GP cut-off time of the first base station, T
GPThe GP length of the second base station.
5. method as claimed in claim 1 or 2 is characterized in that, determines the GP length of the first base station by the requirement of delaying threshold value between the station more than or equal to the first base station.
6. the method at a configuration protection interval is characterized in that, comprising:
Configure the protection interval GP of the first base station;
Determine the GP cut-off time of the second base station by GP cut-off time of the first base station of configuration;
Determine the GP length of the second base station by the requirement of delaying threshold value between the station more than or equal to the second base station, delay threshold value between the station of described the second base station and refer to that signal propagates the second station spacing needed time of threshold value, described second station spacing threshold value refers to that the downstream signal of described the second base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance;
The GP initial time of determining the second base station according to GP cut-off time and the GP length of the second base station;
The GP that configures the second base station by GP cut-off time and the GP initial time of described the second base station.
7. method as claimed in claim 6 is characterized in that, when the first base station is the base station of different TDD systems with the second base station, further comprises:
When the GP of configuration the second base station, configure the timer clock of the second base station by the timer clock of the first base station.
8. such as claim 6 or 7 described methods, it is characterized in that, by calculating t
1=t
2-T
GP, determine the GP initial time t of the second base station
1
Wherein, t
2The GP cut-off time of the second base station, T
GPThe GP length of the second base station.
9. such as claim 6 or 7 described methods, it is characterized in that, determine the GP length of the first base station by the requirement of delaying threshold value between the station more than or equal to the first base station.
10. device that is used for configuration protection interval GP, comprise the input unit for the information that receives outside input, output unit with being used for output GP cut-off time and GP initial time is characterized in that, also comprises first module, second unit, Unit the 3rd and Unit the 4th;
The information that described input unit receives comprises: the protection interval GP initial time t of the first base station of configuration
Ref_1, the first base station the station between delay threshold value T
RefAnd delay threshold value between the station of the second base station, delay threshold value between the station of described the first base station and refer to the signal propagation first stop spacing needed time of threshold value, described first stop spacing threshold value refers to that the downstream signal of described the first base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance, delay threshold value between the station of described the second base station and refer to that signal propagates the second station spacing needed time of threshold value, described second station spacing threshold value refers to that the downstream signal of described the second base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance;
Described first module is by calculating t
Ref_s=t
Ref_1+ T
Ref, obtain effective GP cut-off time t of the first base station
Ref_sEffective GP cut-off time of described the first base station refers to that the GP initial time of described the first base station refers to that described the first base station stops to launch the moment of downstream signal from delaying the moment after the threshold value between the GP initial time of described the first base station postpones the station of described the first base station;
Described second unit was used for by the GP cut-off time of determining the second base station more than or equal to the requirement of effective GP cut-off time of the first base station;
Described Unit the 3rd is used for determining by the requirement of delaying threshold value between the station more than or equal to the second base station the GP length T of the second base station
GP
Described Unit the 4th is by calculating t
1=t
Ref_s-T
GP, determine the GP initial time t of the second base station
1
11. a device that is used for configuration protection interval GP comprises the input unit for the information that receives outside input, and is used for the output unit of output GP cut-off time and GP initial time, it is characterized in that, also comprises Unit the 3rd and Unit the 6th;
The information that described input unit receives comprises: the protection interval GP cut-off time t of the first base station of configuration
2And delay threshold value between the station of the second base station, delay threshold value between the station of described the second base station and refer to that signal propagates the second station spacing needed time of threshold value, described second station spacing threshold value refers to that the downstream signal of described the second base station emission decays to and is not enough to that adjacent base station is received upward signal and causes and disturb needed minimum propagation distance;
Described Unit the 3rd is used for determining by the requirement of delaying threshold value between the station more than or equal to the second base station the GP length T of the second base station
GP
Described Unit the 6th is by calculating t
1=t
2-T
GP, determine the GP initial time t of the second base station
1, the GP cut-off time t of described the first base station
2Equate with GP cut-off time of described the second base station.
12. such as claim 10 or 11 described devices, it is characterized in that, described device is arranged on operation maintenance center, base station controller or base station.
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| CN101114874A (en) * | 2006-07-28 | 2008-01-30 | 中兴通讯股份有限公司 | Synchronous signal transmitting method of TDD system |
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| CN1855765A (en) * | 2005-04-19 | 2006-11-01 | 大唐移动通信设备有限公司 | Primary upload synchronizing method in TDMA system |
| CN101114874A (en) * | 2006-07-28 | 2008-01-30 | 中兴通讯股份有限公司 | Synchronous signal transmitting method of TDD system |
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