CN101383992A - Cell crambling method, system and a network side - Google Patents
Cell crambling method, system and a network side Download PDFInfo
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- CN101383992A CN101383992A CNA2007101214489A CN200710121448A CN101383992A CN 101383992 A CN101383992 A CN 101383992A CN A2007101214489 A CNA2007101214489 A CN A2007101214489A CN 200710121448 A CN200710121448 A CN 200710121448A CN 101383992 A CN101383992 A CN 101383992A
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Abstract
The invention discloses a subdistrict scrambling method. The method comprises the flowing steps: a scrambler pair is distributed for a twin-channel data stream which performs multiple input multiple output (MIMO) transmission in a subdistrict; scrambling is respectively carried out for the twin-channel data stream through two scramblers in the scrambler pair. The invention also discloses a subdistrict scrambling system and a network side. The invention is applied to distribute the scrambler pair for the twin-channel data stream which performs MIMO double-current transmission, and different scramblers in the scrambler pair respectively perform scrambling for the twin-channel data stream, thereby when performing MIMO detection, a receiving terminal can separate the twin-channel data stream combining different scramblers while detecting by utilizing a spatial character, intersymbol interference is effectively reduced, and the system can obtain performances superior to double-current single scramblers; and when the transmitting data size is less and occupies less code channels, a better performance gain can be obtained.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of sub-district method for scrambling, system and a kind of network side.
Background technology
In order further to improve the message transmission rate and the transmission capacity of wireless communication system, at HSPA (High-Speed Packet Access, the high-speed packet access)+(wherein "+" expression evolution) introduced MIMO (Multiple-Input Multiple-Output in, multiple-input and multiple-output) and HOM technology such as (Higher Order Modulation, more high order modulation).Because problems such as realization of the hardware of terminal and cost loss in the system, the MIMO among the existing HSPA+ can support stream transmission at most when transmitting data stream.Double-current MIMO transmitting terminal structure in the existing systems as shown in Figure 1, when in the HSPA+ system, carrying out the MIMO stream transmission, one road high-speed data-flow is divided into parallel two-way low rate data streams after by shunt, this two-way low rate data streams is respectively through coding, interweave and modulate, because the two paths of data flow point does not use different code rates and sign map, the information number of being distributed on therefore every circuit-switched data stream also has nothing in common with each other, further respectively every road low rate data streams is divided into again N son stream, wherein N is according to the defined HS-PDSCH of the terminal capability in the system (High-Speed PhysicalDownlink Shared Channel, high-speed physical downlink shared channel (HS-PDSCH)) maximum number, above-mentioned N son stream uses different OVSF (Orthogonal Variable Spreading Factor, Orthogonal Variable Spreading Factor OVSF) sign indicating number carries out spread spectrum, with merging into the two-way low rate data streams after the addition of the N behind the spread spectrum son stream, at last the two-way low rate data streams is carried out launching from antenna after the scrambling with identical scrambler.
Comprise 32 code characters in the sign indicating number allocative decision when carrying out double-current MIMO emission in the above-mentioned TDD HSPA system, 1 the SYNC-DL (SynchronousDownlink that comprises in each code character, down-going synchronous) sign indicating number, 8 SYNC-UL (Synchronous Uplink, uplink synchronous) sign indicating number, 4 scramblers and 4 basic midamble (training sequence) sign indicating number, wherein scrambler and basic midamble sign indicating number are corresponding one by one.SYNC-DL sign indicating number in the system between the neighbor cell is different, and the SYNC-DL sign indicating number between the non-conterminous sub-district can be multiplexing, when the terminal connecting system, SYNC-DL sign indicating number in 32 code characters is searched for one by one, specifically, and the SYNC-DL sign indicating number of the correlation peak maximum obtained inserted the employed SYNC-DL sign indicating number in sub-district as this terminal by doing relevantly with 32 possible SYNC-DL sign indicating numbers received signal respectively; After the terminal on the down link and system obtain synchronously, according to system's setting, corresponding 8 the SYNC-UL sign indicating numbers of each DwPTS sequence number, terminal is according to the DwPTS sequence number that receives, at random the up SYCL-UL sign indicating number that uses of decision; The mode of determining the SYNC-DL sign indicating number to terminal is similar, and relevant mode is also done with 8 possible SYNC-UL sign indicating numbers respectively with this signal in the base station behind the signal that receives the terminal transmission, judges the SYNC-UL sign indicating number of the current use of terminal.Have 128 basic midamble sign indicating numbers in the system, each SYNC-DL sign indicating number correspondence 4 basic midamble sign indicating numbers, the out of phase that terminal is tested 4 basic midamble sign indicating numbers one by one by the SYNC-DL sign indicating number that obtains, find the employed basic midamble sign indicating number of current system, can also estimate simultaneously the parameter of current wireless channel, these parameters are used for follow-up terminal the scrambler of system are decoded.After having obtained basic midamble sign indicating number, terminal just can obtain the employed scrambler in sub-district by corresponding relation, and in a sub-district, the scrambler that all users use is identical with basic midamble sign indicating number.
The corresponding relation of four kinds of sign indicating numbers in the above-mentioned double-current MIMO transmission time-code allocative decision is as shown in table 1 below, and table 1 is existing standard TS25.223 specified standard sign indicating number allocative decision:
Table 1
Launch after through identical scrambler scrambling after parallel two-way low rate data streams is used identical ovsf code spread spectrum in the prior art, the information on this two paths of data stream is carried by identical code channel.Can receive the data of above-mentioned two paths of data stream at receiving terminal through mixing mutually behind the space channel, because this two paths of data stream is with transmitting simultaneously and with code channel frequently, therefore for the two paths of data stream of sharing identical code channel, can rely on the characteristic of the different spaces channel that they go through to distinguish, this is because the two paths of data stream transmission direction difference in the space channel transmission, so receiving terminal uses the MIMO detection technique to detect and separates signal on the two paths of data stream.Because MIMO detects the beyond-the-horizon communication environment that depends on space channel, and in the mobile communication system of reality, the scattering object around the placement of communication environments, bay and the antenna distributes and all can cause having spatial coherence between each spatial sub-channel.Therefore this spatial coherence is unfavorable for the separation of spatial sub-channel, only relies on the spatial character of signal to detect the signal of above-mentioned two paths of data stream carrying under the space correlation channel, can cause error performance to worsen, the performance of corresponding reduction system.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of sub-district method for scrambling, the two-way data flow is carried out scrambling, cause intersymbol interference easily and reduce the problem of systematic function to solve the identical scrambler of available technology adopting.
Another object of the present invention is to provide a kind of subdistrict scrambling system, adopt identical scrambler that the two-way data flow is carried out scrambling, cause intersymbol interference easily and reduce the problem of systematic function to solve system of the prior art.
Another purpose of the present invention is to provide a kind of network side, can be the identical scrambler of two-way distribution of flows only to solve network side of the prior art, causes intersymbol interference easily and reduces the problem of systematic function.
For addressing the above problem, the invention provides following technical scheme:
A kind of sub-district method for scrambling comprises:
For the scrambler of two-way distribution of flows that in the sub-district, carries out multiple-input and multiple-output MIMO transmission right;
Two different scrambling codes by described scrambler centering carry out scrambling to described two-way data flow respectively.
Described for scrambler of two-way distribution of flows to comprising:
Pre-configured sign indicating number allocation table, it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table;
For a scrambler in the described sign indicating number of the two-way distribution of flows allocation table right.
Described pre-configured sign indicating number allocation table is specially:
According to the cross correlation of all scramblers in the standard code allocation table, become different scrambler right according to two one components described scrambler.
Described pre-configured sign indicating number allocation table is specially:
According to two one group, order is divided into different cohorts with all code characters in the standard code allocation table;
It is right that the scrambler of two code characters in described each cohort is formed scrambler behind the cross match respectively in twos.
The described yard allocation table that sets in advance is specially:
Select an auxilliary scrambler for each the original scrambler in the standard code allocation table, described auxilliary scrambler is to remove in the residue scrambler of described original scrambler in the described standard code allocation table and the minimum scrambler of this original scrambler correlation;
It is right that the auxilliary scrambler of described original scrambler and this original scrambler is formed scrambler.
Described for scrambler of two-way distribution of flows to comprising:
It is right to select two different scramblers to form a scrambler from the standard code allocation table;
For the described scrambler of two-way distribution of flows right.
Describedly from the standard code allocation table, select two different scramblers to form scramblers to being specially:
From described standard code allocation table, select a scrambler as main scrambler;
Analyze the residue scrambler except that described main scrambler and the correlation of this main scrambler in the described standard code allocation table;
Determine the scrambler conduct auxilliary scrambler minimum with described main scrambler correlation, it is right that described main scrambler and auxilliary scrambler are formed a scrambler.
When carrying out the single channel data flow transmission simultaneously in the described sub-district, described method also comprises:
The scrambler that described scrambler centering is set is as main scrambler;
By described main scrambler described single channel data flow is carried out scrambling.
A kind of subdistrict scrambling system comprises:
Network side is used to the scrambler of two-way distribution of flows that carries out multiple-input and multiple-output MIMO transmission in the sub-district right;
The base station end, two different scrambling codes that are used for the scrambler centering of distributing by described network side carry out scrambling to described two-way data flow respectively.
Described network side comprises:
Dispensing unit is used for pre-configured sign indicating number allocation table, and it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table;
Allocation units are used to a scrambler in the described sign indicating number of the two-way distribution of flows allocation table that carries out multiple-input and multiple-output MIMO transmission in the sub-district right.
Described network side comprises:
Selected cell, it is right to be used for selecting two different scramblers to form a scrambler from the standard code allocation table;
Allocation units are used to the described scrambler of two-way distribution of flows that carries out the MIMO transmission in the sub-district right.
When carrying out the single channel data flow transmission simultaneously in the described sub-district,
Described network side is further used for, and the scrambler that described scrambler centering is set is as main scrambler;
Described base station end is further used for, and by described main scrambler described single channel data flow is carried out scrambling.
A kind of network side comprises:
Determining unit is used for confirming that the sub-district carries out multiple-input and multiple-output MIMO transmission;
Allocation units are used to scrambler of two-way distribution of flows of the described MIMO of carrying out transmission right.
Described allocation units comprise:
Configuration code allocation table unit is used for pre-configured sign indicating number allocation table, and it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table;
Distribute scrambler to the unit, be used to a scrambler in the described sign indicating number of the two-way distribution of flows allocation table that in the sub-district, carries out multiple-input and multiple-output MIMO transmission right.
Described allocation units comprise:
Select scrambler to the unit, it is right to be used for selecting two different scramblers to form a scrambler from the standard code allocation table;
Distribute scrambler to the unit, be used to the described scrambler of two-way distribution of flows that in the sub-district, carries out the MIMO transmission right.
When carrying out the single channel data flow transmission simultaneously in the described sub-district, described network side further comprises:
Main scrambler unit is set, and a scrambler that is used to described scrambler centering is set is as main scrambler, and described main scrambler is used for described single channel data flow is carried out scrambling.
By above technical scheme provided by the invention as can be known, the present invention is right for the scrambler of two-way distribution of flows that carries out MIMO transmission in the sub-district, and two different scrambling codes by this scrambler centering carry out scrambling to described two-way data flow respectively.Use the present invention and be that to carry out the two paths of data flow distribution scrambler of MIMO stream transmission right, different scrambling codes by scrambler centering carries out scrambling to two paths of data stream respectively, therefore receiving terminal is when carrying out the MIMO detection, can be when utilizing spatial character to detect, come two paths of data stream is separated in conjunction with different scramblers, effectively reduce intersymbol interference, make system can obtain to be better than the performance of double-current single scrambler, especially in the sub-district data quantity transmitted less, take code channel and can not obtain the more performance gain for a long time; When the two scramblers of double fluid of the present invention distribute based on existing allocative decision, can guarantee that other yard method of salary distribution except scrambler is constant in the sign indicating number distribution, therefore the complexity of operation is not high and less to the change of existing standard; The two scramblers of double fluid of the present invention distribute when the cross correlation of existing scrambler is divided, and can obtain more excellent network performance; The two scramblers of double fluid of the present invention distribute by choosing main scrambler, and it is right to select the lower auxilliary scrambler of correlation to form scrambler according to main scrambler flexibly then, has therefore kept the sign indicating number allocative decision of existing standard constant, has strengthened the overall performance of system simultaneously.
Description of drawings
Fig. 1 be in the existing system double-current MIMO transmitting terminal structure as figure;
Fig. 2 is the first embodiment flow chart of the inventive method;
Fig. 3 is the second embodiment flow chart of the inventive method;
Fig. 4 is the 3rd embodiment flow chart of the inventive method;
Fig. 5 is the 4th embodiment flow chart of the inventive method;
Fig. 6 is the 5th embodiment flow chart of the inventive method;
Fig. 7 is the first embodiment block diagram of system of the present invention;
Fig. 8 is the second embodiment block diagram of system of the present invention;
Fig. 9 is the 3rd embodiment block diagram of system of the present invention;
Figure 10 is the first embodiment block diagram of network side of the present invention;
Figure 11 is the second embodiment block diagram of network side of the present invention.
Embodiment
Core of the present invention provides a kind of sub-district method for scrambling, and this method is by right for the scrambler of two-way distribution of flows that carries out the MIMO transmission in the sub-district, and two different scrambling codes by this scrambler centering carry out scrambling to described two-way data flow respectively then.
In order to make those skilled in the art person understand the present invention program better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
When application the present invention can carry out the MIMO transmission in TDD HSPA system, be that different data flow is used different scramblers.In order to improve the single scrambler of available technology adopting double fluid data stream is carried out the intersymbol interference that scrambling produces, the present invention adjusts accordingly the sign indicating number allocative decision among the existing standard TS25.223, and to change the sign indicating number allocative decision in the existing standard as shown in table 1 in order trying one's best littlely, can to keep the allocative decision of other the three kinds of sign indicating numbers except that scrambler in 32 code characters constant.When connecting in the sub-district like this, by the corresponding relation between the SYNC-DL sign indicating number in each code character that rebulids, SYNC-UL sign indicating number, scrambler and the basic midamble sign indicating number, for a pair of scrambler of two paths of data flow distribution does not carry out scrambling with different scramblers to the two paths of data flow point with realization, reduce intersymbol interference with this, improve systematic function.Wherein, for the cross correlation of two scramblers in a pair of scrambler of each cell allocation will be low and orthogonality good, and be neighbor cell allocation scrambler between cross correlation also low, thereby when using different scrambling codes that double fluid is carried out scrambling, can further reduce intersymbol interference.
The first embodiment flow chart of the inventive method is as shown in Figure 2:
Step 210: for the scrambler of two-way distribution of flows that in the sub-district, carries out MIMO transmission right.
Wherein, for scrambler of two-way distribution of flows to the time, can be pre-configured the sign indicating number allocation table, it is right to have comprised the scrambler of being made up of different scrambling codes in this yard allocation table, then with a scrambler in this yard allocation table to distributing to the two-way data flow; It is right also can to select two different scramblers to form a scrambler from the standard code allocation table by high level, then with this scrambler to distributing to the two-way data flow.
Step 220: two different scrambling codes by this scrambler centering carry out scrambling to the two-way data flow respectively.
Further, when carrying out the single channel data flow transmission simultaneously in the sub-district, can also a main scrambler be set each scrambler centering, and the single channel data flow be carried out scrambling with this main scrambler.
The second embodiment flow chart of the inventive method as shown in Figure 3, this embodiment shows and is carrying out the timing of sign indicating number branch, utilize in 128 scramblers in 32 code characters of standard code allocation table, cross correlation between the scrambler is redistributed these scramblers in twos, realize becoming 2 pairs of scramblers by 4 original scramblers in each code character, and each scrambler is pair corresponding with two basic midamble sign indicating numbers:
Step 301: it is right that 128 scramblers are divided into 64 scramblers, and be that each scrambler is to determining a main scrambler.
By analyzing 128 scramblers cross correlation between any two, it is right that 128 scramblers are divided into 64 scramblers, each scrambler centering comprises two scramblers, and right for each scrambler to distributing a sign to be used to discern this scrambler, it is right that these 128 scramblers are divided into 64 scramblers of sign from 0 to 63 after having assigned.In distributing the right process of scrambler, guarantee to have lower cross correlation between two scramblers of each scrambler centering by analysed for relevance, guarantee that with this MIMO transmission can obtain the preferable performance gain.
Further, in order to support MIMO stream transmission and single-stream transmission compatibility simultaneously, in two right scramblers of each scrambler, determine when carrying out single-stream transmission, can use the main scrambler of scrambler centering that single current is carried out scrambling by a main scrambler.Like this, only need for scrambler of each cell allocation to can compatible MIMO two-way data flow transmission and single channel data flow transmission.
Step 302: divide per two scramblers to corresponding code character, each scrambler is to corresponding two basic midamble sign indicating numbers.
To being divided into 32 code characters, it is right to have comprised two scramblers in each code character with 64 scramblers, and two scramblers of each scrambler centering are corresponding respectively with two basic midamble sign indicating numbers.For example, in code character 1, comprise that scrambler is right to being designated two scramblers of 0 to 1, and 4 basic midamble sign indicating numbers that are designated 0 to 3, wherein basic midamble sign indicating number 0 and basic midamble sign indicating number 1 corresponding scrambler are to 0, and basic midamble sign indicating number 2 and basic midamble sign indicating number 3 corresponding scramblers are to 1.In dividing the process of code character, also need to make the cross correlation of scrambler of each interblock low, reduce the intersymbol interference of neighbor cell with this.
Carry out sign indicating number in the embodiment of the invention two and divide timing, should will comprise in the existing standard sign indicating number allocative decision as shown in table 1, all 128 scramblers are according to the correlation analysis result, and it is right to form 64 scramblers, and two then that correlation is low scramblers are to forming new code character.For example, the code character 1 in the table 1 comprises scrambler 0 to scrambler 3, in the corresponding embodiment of the invention, scrambler to 0 and scrambler to containing scrambler 0 at least one scrambler to the scrambler 3 in 1 respectively at least.
According to said method, a kind of yard allocative decision when double-current MIMO transmits in the present embodiment is as shown in table 2 below:
Table 2
Whether step 303: judging that terminal is current is operated under the MIMO two-way data flow transmission pattern, if then execution in step 304; Otherwise, execution in step 306.
Step 304: for the scrambler of two-way distribution of flows that in the sub-district, carries out MIMO transmission right.
Judge the terminal work at present under MIMO two-way data flow transmission pattern, from above-mentioned sign indicating number allocation table table 2, select a scrambler distributing to the two-way data flow in the sub-district.
Step 305: two scramblers with this scrambler centering carry out scrambling to the two-way data flow respectively, finish current flow process.
After terminal receives two paths of data stream, can at first detect basic midamble sign indicating number, by basic midamble sign indicating number and the right corresponding relation of scrambler in the table 2, the employed scrambler of acquisition current area is right, and with this scrambler to the two-way data flow that receives is carried out descrambling and detection.
Step 306: be the main scrambler of the scrambler centering of single channel distribution of flows of in the sub-district, transmitting.
Judge the terminal work at present under single channel data flow transmission pattern, the main scrambler of a scrambler centering of selection is distributed to the single channel data flow in the sub-district from above-mentioned sign indicating number allocation table table 2.
Step 307: with this main scrambler this single channel data flow is carried out scrambling, finish current flow process.
This moment, this terminal found the employed scrambler of current area right by the right corresponding relation of basic midamble sign indicating number and scrambler in the table 2 after detecting basic midamble sign indicating number, and obtain from this scrambler centering and to carry out the main scrambler that sign indicating number divides timing to determine, and the single channel data flow that receives is carried out descrambling and detection with this main scrambler.
Method for scrambling when the foregoing description two has been considered in the sub-district compatible MIMO stream transmission and single-stream transmission simultaneously, for the MIMO stream transmission, use a scrambler to double fluid is carried out scrambling, for single-stream transmission, then only single current is carried out scrambling and get final product, and needn't be scrambler of the independent distribution of single-stream transmission again with the main scrambler of the scrambler centering of distributing.Therefore, using the embodiment of the invention two not only can compatible MIMO stream transmission and single-stream transmission, and owing to the two paths of data flow point in the stream transmission do not carried out with different scramblers carry out scrambling, correspondingly reduced intersymbol interference, make the performance raising of whole network.
The 3rd embodiment flow chart of the inventive method as shown in Figure 4, this embodiment shows and is carrying out the timing of sign indicating number branch, separately 4 scramblers in per two adjacent code characters are carried out cross match, scrambler after will matching is then distributed to two code characters, it is right that 4 scramblers in each code character after distributing are divided into 2 scramblers, two scramblers of each scrambler centering, one is scrambler original in this code character, another is a scrambler original in the code character that is adjacent:
Step 401: 32 code characters are divided into 16 cohorts in proper order, comprise 2 code characters in each cohort.
As cohort 1, corresponding code character 3 and code character 4 are divided into 16 cohorts with this method of salary distribution with existing 32 code characters as cohort 2 with the code character 1 in the existing standard sign indicating number allocative decision as shown in table 1 and code character 2.
Step 402: the scrambler of two code characters in each cohort is formed two new code characters behind the cross match respectively in twos.
With cohort 1 is example, code character 1 in this cohort 1 comprises that scrambler 0 is to scrambler 3, code character 2 comprises that scrambler 4 is to scrambler 7, after scrambler in code character 1 and the code character 2 carried out in twos cross match, it is right to form 4 scramblers, be respectively comprise scrambler 0 and scrambler 4 scrambler to 0, the scrambler that comprises scrambler 1 and scrambler 5 is to 1, the scrambler that comprises scrambler 2 and scrambler 6 is to 2, the scrambler that comprises scrambler 3 and scrambler 7 is to 3, then with scrambler to 0 and scrambler distribute to code character 1 to 1, with scrambler to 2 and scrambler distribute to code character 2 to 3, the right method of salary distribution of other scrambler is by that analogy.
The corresponding relation of four kinds of sign indicating numbers in the present embodiment in the double-current MIMO transmission time-code allocative decision is as shown in table 3 below:
Table 3
Step 403: the public scrambler of determining each scrambler centering is main scrambler.
With the cohort 1 after distributing is example, the scrambler of the code character 1 of cohort 1 is to the scrambler 0 in 0, and scrambler is the public scrambler that the code character 1 in the existing standard as shown in table 1 is comprised to the scrambler 1 in 1, therefore scrambler is defined as with respect to the main scrambler of this scrambler to scrambler 4 in 0 scrambler 0 in 0, scrambler is defined as with respect to the main scrambler of this scrambler to scrambler 5 in 1 scrambler 1 in 1, the scrambler of the code character of other cohort to when determining main scrambler by that analogy.
Whether step 404: judging that terminal is current is operated under the MIMO two-way data flow transmission pattern, if then execution in step 405; Otherwise, execution in step 407.
Step 405: for the scrambler of two-way distribution of flows that in the sub-district, carries out MIMO transmission right.
Judge the terminal work at present under MIMO two-way data flow transmission pattern, from above-mentioned sign indicating number allocation table table 3, select a scrambler distributing to the two-way data flow in the sub-district.
Further, can be right for the scrambler in the code character of adjacent other cohort of cell allocation, above-mentioned programme that can be by acquiescence or high-rise signaling indications for the scrambler in the different cohorts of neighbor cell allocation realized.
Step 406: two scramblers with this scrambler centering carry out scrambling to the two-way data flow respectively, finish current flow process.
Step 407: be the main scrambler of the scrambler centering of single channel distribution of flows of in the sub-district, transmitting.
Judge the terminal work at present under single channel data flow transmission pattern, the main scrambler of a scrambler centering of selection is distributed to the single channel data flow in the sub-district from above-mentioned sign indicating number allocation table table 3.
Step 408: with this main scrambler this single channel data flow is carried out scrambling, finish current flow process.
Scrambling when the foregoing description three promptly can be realized in the sub-district compatible MIMO stream transmission and single-stream transmission simultaneously, simultaneously by scrambler is carried out cross-assignment form scrambler to the time, less to the change of existing sign indicating number allocative decision.Therefore, using the embodiment of the invention three not only can compatible MIMO stream transmission and single-stream transmission, and owing to the two paths of data flow point in the stream transmission do not carried out with different scramblers carried out scrambling, correspondingly reduced intersymbol interference, further divide and make that the right correlation of the scrambler that distributes between the neighbor cell is lower, improved the performance of whole network thus by cohort.
The 4th embodiment of the inventive method as shown in Figure 5, this embodiment shows and is carrying out the timing of sign indicating number branch, be that 32 code characters are distributed main scrambler respectively, be that each main scrambler distributes an auxilliary scrambler by each main scrambler and the cross correlation that remains scrambler then, it is right that each main scrambler and the auxilliary scrambler corresponding with it are formed a scrambler, and it is right to comprise two scramblers in each code character:
Step 501: each scrambler and the correlation that remains scrambler in the analytical standard sign indicating number allocation table.
Analyze the correlation between each scrambler and 127 scramblers of the residue except that this scrambler in 128 scramblers respectively.For example, be designated 0 scrambler for scrambler in the code character 1, analyze 127 scramblers of this scrambler 0 and residue, promptly scrambler 1 is to the correlation of scrambler 127.The process of all the other scrambler analysed for relevance is consistent with scrambler 0.
Step 502: according to analysis result will with the minimum scrambler of each scrambler correlation as its auxilliary scrambler.
According to the correlation results of each scrambler of analyzing with 127 scramblers of residue, therefrom select the minimum scrambler of correlation as the auxilliary scrambler that is used for the scrambler of comparison correlation, this is used for, and the scrambler of comparison correlation is corresponding to be made as main scrambler.Still be example with scrambler 0, according to its correlation analysis result with 127 scramblers of residue, suppose that scrambler 1 is and the minimum scrambler of its correlation, it is main scrambler that scrambler 0 then is set, and corresponding scrambler 1 is the auxilliary scrambler of scrambler 0, and corresponding scrambler is designated f1.
Further, analysis result according to correlation, the auxilliary scrambler that has a plurality of main scramblers is identical, for example, find by analysed for relevance, if scrambler 2 is and the minimum scrambler of scrambler 0 correlation, this scrambler 2 also is and the minimum scrambler of scrambler 1 correlation simultaneously, then need to reduce the scrambler that in auxilliary scrambler, duplicates as far as possible, may be assigned to the probability of identical scrambler with the minimizing neighbor cell, thereby reduce the intersymbol interference of neighbor cell according to coordinating.
Step 503: it is right that scrambler is formed in each main scrambler scrambler binding auxilliary with it back.
After being respectively the auxilliary scrambler that each main scrambler has been selected and its correlation is minimum, it is right that each main scrambler scrambler auxilliary with it formed a scrambler, and it is right to comprise 128 scramblers in the whole sign indicating number allocation table.
The corresponding relation of four kinds of sign indicating numbers in the present embodiment in the double-current MIMO transmission time-code allocative decision is as shown in table 4 below:
Table 4
Whether step 504: judging that terminal is current is operated under the MIMO two-way data flow transmission pattern, if then execution in step 505; Otherwise, execution in step 507.
Step 505: for the scrambler of two-way distribution of flows that in the sub-district, carries out MIMO transmission right.
Judge the terminal work at present under MIMO two-way data flow transmission pattern, from above-mentioned sign indicating number allocation table table 4, select a scrambler distributing to the two-way data flow in the sub-district.
Step 506: main scrambler and auxilliary scrambler with this scrambler centering carry out scrambling to the two-way data flow respectively, finish current flow process.
Step 507: be the main scrambler of the scrambler centering of distribution of flows of single-stream transmission in the sub-district.
Judge the terminal work at present under single channel data flow transmission pattern, the main scrambler of a scrambler centering of selection is distributed to the single channel data flow in the sub-district from above-mentioned sign indicating number allocation table table 4.
Step 508: with this main scrambler this data flow is carried out scrambling, finish current flow process.
The 5th embodiment flow chart of the inventive method as shown in Figure 6, this embodiment shows and needn't the sign indicating number allocative decision in the existing standard be adjusted, in transmission course, from the standard code allocation table, select a scrambler as main scrambler but lead to, select an auxilliary scrambler by the residue scrambler of network side analysis and the correlation of main scrambler then, right with scrambler of main scrambler composition:
Step 601: for scrambler of two-way distribution of flows of in the sub-district, carrying out MIMO transmission as main scrambler.
The main scrambler that distributes is a scrambler in the existing standard sign indicating number allocative decision shown in the table 1.
Whether step 602: judging that terminal is current is operated under the MIMO two-way data flow transmission pattern, if then execution in step 603; Otherwise, execution in step 606.
Step 603: after the scrambler that network side will can be used for current area gathers, analyze the correlation of these scramblers and main scrambler respectively.
Wherein, the scrambler that can be used for current area comprises the also unallocated scrambler of using for other sub-district; And because current area and some sub-district distance are far away, therefore can the multiplexing scrambler of having distributed to these sub-districts.
Step 604: the scrambler that selection and main scrambler correlation are minimum from the scrambler that gathers is right as scrambler of composition after assisting scrambler.
Step 605: two scramblers with this scrambler centering carry out scrambling to the two-way data flow respectively, finish current flow process.
Step 606: with main scrambler the single channel data flow is carried out scrambling, finish current flow process.
Corresponding with the inventive method, the present invention also provides a kind of subdistrict scrambling system, carries out the two-way data flow of MIMO transmission in this system and all carries out scrambling by different scrambling codes.
First embodiment of subdistrict scrambling system of the present invention is as shown in Figure 7:
This system comprises: network side 710 and base station end 720.
Wherein, it is right that network side 710 is used to the scrambler of two-way distribution of flows that carries out multiple-input and multiple-output MIMO transmission in the sub-district; Base station end 720 is used for respectively described two-way data flow being carried out scrambling by two different scrambling codes of the scrambler centering of described network side distribution.
Further, when carrying out the single channel data flow transmission simultaneously in the sub-district, network side 710 is further used for being provided with a scrambler of described scrambler centering as main scrambler; Base station end 720 is further used for by described main scrambler described single channel data flow being carried out scrambling.
Second embodiment of subdistrict scrambling system of the present invention is as shown in Figure 8:
This system comprises: network side 810 and base station end 820.Wherein, it is right that network side 810 is used to the scrambler of two-way distribution of flows that carries out multiple-input and multiple-output MIMO transmission in the sub-district; Base station end 820 is used for respectively described two-way data flow being carried out scrambling by two different scrambling codes of the scrambler centering of described network side distribution.
Concrete, network side 810 comprises dispensing unit 811, is used for pre-configured sign indicating number allocation table, it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table; And allocation units 812, be used to a scrambler in the described sign indicating number of the two-way distribution of flows allocation table that in the sub-district, carries out multiple-input and multiple-output MIMO transmission right.
The 3rd embodiment of subdistrict scrambling system of the present invention is as shown in Figure 9:
This system comprises: network side 910 and base station end 920.Wherein, it is right that network side 910 is used to the scrambler of two-way distribution of flows that carries out multiple-input and multiple-output MIMO transmission in the sub-district; Base station end 920 is used for respectively described two-way data flow being carried out scrambling by two different scrambling codes of the scrambler centering of described network side distribution.
Concrete, network side 910 comprises selected cell 911, it is right to be used for selecting two different scramblers to form a scrambler from the standard code allocation table; And allocation units 912, be used to the described scrambler of two-way distribution of flows that in the sub-district, carries out the MIMO transmission right.
Corresponding with the inventive method and system, the present invention also provides a kind of network side, and the scrambler that can comprise different scrambling codes in this network side for the two-way distribution of flows of carrying out the MIMO transmission in the sub-district is right.
The first embodiment block diagram of network side of the present invention is as shown in figure 10:
This network side comprises: determining unit 1010 and allocation units 1020.Wherein, determining unit 1010 is used for confirming that the sub-district carries out multiple-input and multiple-output MIMO transmission; Allocation units 1020 are used to scrambler of two-way distribution of flows of the described MIMO of carrying out transmission right.
Concrete, allocation units 1020 comprise configuration code allocation table unit 1021, are used for pre-configured sign indicating number allocation table, it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table; And distribute scrambler to unit 1022, be used to a scrambler in the described sign indicating number of the two-way distribution of flows allocation table that in the sub-district, carries out multiple-input and multiple-output MIMO transmission right.
Further, when carrying out the single channel data flow transmission simultaneously in the sub-district, can also comprise that is provided with a main scrambler unit, a scrambler that is used to described scrambler centering is set is as main scrambler, and described main scrambler is used for described single channel data flow is carried out scrambling.
The second embodiment block diagram of network side of the present invention is as shown in figure 11:
This network side comprises: determining unit 1110 and allocation units 1120.Wherein, determining unit 1110 is used for confirming that the sub-district carries out multiple-input and multiple-output MIMO transmission; Allocation units 1120 are used to scrambler of two-way distribution of flows of the described MIMO of carrying out transmission right.
Concrete, allocation units 1120 comprise selects scrambler to unit 1121, and it is right to be used for selecting two different scramblers to form a scrambler from the standard code allocation table; And distribute scrambler to unit 1122, be used to the described scrambler of two-way distribution of flows that in the sub-district, carries out the MIMO transmission right.
Further, when carrying out the single channel data flow transmission simultaneously in the sub-district, can also comprise that is provided with a main scrambler unit, a scrambler that is used to described scrambler centering is set is as main scrambler, and described main scrambler is used for described single channel data flow is carried out scrambling.
Describe as can be known by above embodiments of the invention, the present invention is right for the scrambler of two-way distribution of flows that carries out the MIMO transmission in the sub-district, and two different scrambling codes by this scrambler centering carry out scrambling to described two-way data flow respectively.Use the present invention and be that to carry out the two paths of data flow distribution scrambler of MIMO stream transmission right, different scrambling codes by scrambler centering carries out scrambling to two paths of data stream respectively, therefore receiving terminal is when carrying out the MIMO detection, can be when utilizing spatial character to detect, come two paths of data stream is separated in conjunction with different scramblers, effectively reduce intersymbol interference, make system can obtain to be better than the performance of double-current single scrambler.
Though described the present invention by embodiment, those of ordinary skills all know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (16)
1, a kind of sub-district method for scrambling is characterized in that, comprising:
For the scrambler of two-way distribution of flows that in the sub-district, carries out multiple-input and multiple-output MIMO transmission right;
Two different scrambling codes by described scrambler centering carry out scrambling to described two-way data flow respectively.
2, method according to claim 1 is characterized in that, described for scrambler of two-way distribution of flows to comprising:
Pre-configured sign indicating number allocation table, it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table;
For a scrambler in the described sign indicating number of the two-way distribution of flows allocation table right.
3, method according to claim 2 is characterized in that, described pre-configured sign indicating number allocation table is specially:
According to the cross correlation of all scramblers in the standard code allocation table, become different scrambler right according to two one components described scrambler.
4, method according to claim 2 is characterized in that, described pre-configured sign indicating number allocation table is specially:
According to two one group, order is divided into different cohorts with all code characters in the standard code allocation table;
It is right that the scrambler of two code characters in described each cohort is formed scrambler behind the cross match respectively in twos.
5, method according to claim 2 is characterized in that, the described yard allocation table that sets in advance is specially:
Be that each the original scrambler in the standard code allocation table selects an auxilliary scrambler, described auxilliary scrambler is in the described standard code allocation table in the residue scrambler except that described original scrambler and the minimum scrambler of this original scrambler correlation;
It is right that the auxilliary scrambler of described original scrambler and this original scrambler is formed scrambler.
6, method according to claim 1 is characterized in that, described for scrambler of two-way distribution of flows to comprising:
It is right to select two different scramblers to form a scrambler from the standard code allocation table;
For the described scrambler of two-way distribution of flows right.
7, method according to claim 6 is characterized in that, describedly selects two different scramblers to form scramblers to being specially from the standard code allocation table:
From described standard code allocation table, select a scrambler as main scrambler;
Analyze the residue scrambler except that described main scrambler and the correlation of this main scrambler in the described standard code allocation table;
Determine the scrambler conduct auxilliary scrambler minimum with described main scrambler correlation, it is right that described main scrambler and auxilliary scrambler are formed a scrambler.
8, method according to claim 1 is characterized in that, when carrying out the single channel data flow transmission simultaneously in the described sub-district, described method also comprises:
The scrambler that described scrambler centering is set is as main scrambler;
By described main scrambler described single channel data flow is carried out scrambling.
9, a kind of subdistrict scrambling system is characterized in that, comprising:
Network side is used to the scrambler of two-way distribution of flows that carries out multiple-input and multiple-output MIMO transmission in the sub-district right;
The base station end, two different scrambling codes that are used for the scrambler centering of distributing by described network side carry out scrambling to described two-way data flow respectively.
10, system according to claim 9 is characterized in that, described network side comprises:
Dispensing unit is used for pre-configured sign indicating number allocation table, and it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table;
Allocation units are used to a scrambler in the described sign indicating number of the two-way distribution of flows allocation table that carries out multiple-input and multiple-output MIMO transmission in the sub-district right.
11, system according to claim 9 is characterized in that, described network side comprises:
Selected cell, it is right to be used for selecting two different scramblers to form a scrambler from the standard code allocation table;
Allocation units are used to the described scrambler of two-way distribution of flows that carries out the MIMO transmission in the sub-district right.
12, system according to claim 9 is characterized in that, when carrying out the single channel data flow transmission simultaneously in the described sub-district,
Described network side is further used for, and the scrambler that described scrambler centering is set is as main scrambler;
Described base station end is further used for, and by described main scrambler described single channel data flow is carried out scrambling.
13, a kind of network side is characterized in that, comprising:
Determining unit is used for confirming that the sub-district carries out multiple-input and multiple-output MIMO transmission;
Allocation units are used to scrambler of two-way distribution of flows of the described MIMO of carrying out transmission right.
14, network side according to claim 13 is characterized in that, described allocation units comprise:
Configuration code allocation table unit is used for pre-configured sign indicating number allocation table, and it is right to comprise the scrambler of being made up of different scrambling codes in the described sign indicating number allocation table;
Distribute scrambler to the unit, be used to a scrambler in the described sign indicating number of the two-way distribution of flows allocation table that in the sub-district, carries out multiple-input and multiple-output MIMO transmission right.
15, network side according to claim 13 is characterized in that, described allocation units comprise:
Select scrambler to the unit, it is right to be used for selecting two different scramblers to form a scrambler from the standard code allocation table;
Distribute scrambler to the unit, be used to the described scrambler of two-way distribution of flows that in the sub-district, carries out the MIMO transmission right.
16, network side according to claim 13 is characterized in that, when carrying out the single channel data flow transmission simultaneously in the described sub-district, described network side further comprises:
Main scrambler unit is set, and a scrambler that is used to described scrambler centering is set is as main scrambler, and described main scrambler is used for described single channel data flow is carried out scrambling.
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| CN2007101214489A CN101383992B (en) | 2007-09-06 | 2007-09-06 | Cell crambling method, system and a network side |
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| CN2007101214489A CN101383992B (en) | 2007-09-06 | 2007-09-06 | Cell crambling method, system and a network side |
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| CN107656758A (en) * | 2016-07-25 | 2018-02-02 | 中兴通讯股份有限公司 | Reduce crosstalk method, device and system |
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| CN1271806C (en) * | 2003-10-31 | 2006-08-23 | 大唐移动通信设备有限公司 | Transmitting set and receiving set of multiple antenna communication system under time division duplexing mode, and method |
| CN100555921C (en) * | 2004-07-27 | 2009-10-28 | 大唐移动通信设备有限公司 | The district code word planing method of time-division-synchronization code multi-address division system |
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| CN107656758A (en) * | 2016-07-25 | 2018-02-02 | 中兴通讯股份有限公司 | Reduce crosstalk method, device and system |
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