CN101772148A - Auxiliary synchronizing channel configuring method and device, and subcarrier mapping method and device - Google Patents
Auxiliary synchronizing channel configuring method and device, and subcarrier mapping method and device Download PDFInfo
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- CN101772148A CN101772148A CN200910000038A CN200910000038A CN101772148A CN 101772148 A CN101772148 A CN 101772148A CN 200910000038 A CN200910000038 A CN 200910000038A CN 200910000038 A CN200910000038 A CN 200910000038A CN 101772148 A CN101772148 A CN 101772148A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
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Abstract
The invention discloses auxiliary synchronizing channel configuring method and device as well as subcarrier mapping method and device. The configuring method for auxiliary synchronizing channels comprises the following steps of: configuring a first basic sequence set of each combination of district ID and sector ID carried by the auxiliary synchronizing channel for expressing a macro base station; and/or configuring a second basic sequence set of each combination of district ID and sector ID of the macro base station for expressing a family base station, and a family base station ID sequence set for expressing the ID information of the family base station. The invention can map the information in synchronous signals on the auxiliary synchronizing channel of an orthogonal frequency division multiplexing system by the sequences in the sequence set, generate the synchronous signal, clearly identify the types and ID information of each base station and flexibly adapt to various changes of the base stations, and is beneficial to optimizing the system property.
Description
Technical field
The present invention relates to the communications field, and especially, relate to the synchronizing signal launching technique and the device of a kind of collocation method of auxiliary synchronization channel and device, sub-carrier mapping method and device, auxiliary synchronization channel.
Background technology
OFDM (Orthogonal Frequency Division Multiplex abbreviates OFDM as) is a kind of multi-carrier transmission pattern.This technology is converted to one group of low-speed parallel data flow transmitted by the data flow with a high-speed transfer, can effectively reduce the susceptibility of system to the multidiameter fading channel frequency selectivity; By introducing Cyclic Prefix, ability that can also the anti-intersymbol interference of enhanced system (Inter-symbol Interference abbreviates ISI as); In addition, this technology also has the bandwidth availability ratio height, realizes characteristics such as simple.Rely on above-mentioned advantage, the OFDM technology is more and more in the application in radio communication basin, for example, WLAN (wireless local area network) (Wireless Local Area Network abbreviates WLAN as) system, all be based on the system of OFDM technology based on the 802.16e system of orthogonal frequency division multiplexing multiple access and the follow-on evolution 802.16m of 802.16e system (the 4th generation communication system) etc.
For mobile communication system, terminal usually need be by the synchronizing channel access network, and in general, inserting step can comprise:
(1) time, Frequency Synchronization;
(2) cell ID (Cell ID) detects,
(3) broadcast reads.
By adopting above-mentioned steps, terminal can begin follow-up access procedure according to the information in the broadcast.
For mobile communication system, access procedure is a very important process.An important indicator of access procedure is turn-on time, and turn-on time is short more, and the expression systematic function is high more.But, need realize by synchronizing channel owing to insert, and for the Traffic Channel of transmitting subscriber information, resource occupation will constitute expense.So,, need between access performance and synchronizing channel resource occupation, carry out balance if wish the mobile communication system that structural behavior is good.
In order to satisfy the application requirements of low deferred traffic in the NGBW communication system, in the design of current 16m frame structure, three layers of mentality of designing of superframe, unit frame and subframe have mainly been considered.As shown in Figure 1, superframe 101 is made up of 4 unit frame 102, and superframe control information 103 is positioned on several symbols that superframe begins to locate.Unit frame 102 is made up of 8 subframe unit 104, and subframe unit 104 is divided into descending sub frame unit and sub-frame of uplink unit, can be configured according to system.Subframe unit 104 is made of 6 OFDM symbols 105.
Usually, superframe, unit frame and three layers of frame structure of subframe adopt the synchronization channel design of layering, promptly, synchronizing channel is divided into primary synchronization channel (Primary Synchronization Channel, abbreviate P-SCH as) and auxiliary synchronization channel (Secondary Synchronization Channel abbreviates S-SCH as).In the 4th generation communication system, the type of base station system is more diversified, be divided into macro base station (sub-district), little base station (sub-district), Home eNodeB (Femto BS, also can be called subbase station etc.), relaying (Relay) base station etc., also there is different system configuration in different base station systems, for example, and different system bandwidths, different multi-carrier modes etc.
Because macro base station may be deployed to hundred even thousands of Femto base stations down, Femto base station not only quantity is a lot, and the correlation between quantity and the base station changes easily, therefore, can be clearly information such as the type of these base stations, sub-district id information be clearly showed for realizing that base station and communication between terminals are very important.Yet, at present, effective solution is not proposed as yet for how designing synchronizing channel with the sub-district id information that reaches the dissimilar base stations of sign and keeping the purpose that satisfies the expansion demand of Femto base station under the prerequisite of synchronization channel design.
Summary of the invention
The synchronization channel design scheme in the correlation technique considered can not clearly identify the sub-district id information of dissimilar base stations and can not satisfy the expansion demand problem of Femto base station and make the present invention, for this reason, main purpose of the present invention is to provide a kind of allocation plan, subcarrier mapping scheme of auxiliary synchronization channel, the synchronizing signal launch scenario of auxiliary synchronization channel.
According to an aspect of the present invention, provide a kind of collocation method of auxiliary synchronization channel, be used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured.
Collocation method according to auxiliary synchronization channel of the present invention comprises: configuration is used to represent the first basic sequence collection of each combination of sub-district ID that the auxiliary synchronization channel of macro base station carries and sector ID; And/or configuration is used to represent second sequence sets of each combination of the sub-district ID of affiliated macro base station of Home eNodeB and sector ID, and the Home eNodeB ID sequence sets that is used to represent the id information of Home eNodeB.
Wherein, the processing of disposing the first basic sequence collection can comprise: each combination of determining sub-district ID that the auxiliary synchronization channel of macro base station carries and sector ID and first basic sequence are concentrated the first mapping relations table of sequence.
And, after having disposed the first basic sequence collection, can concentrate from first basic sequence according to the combination of real cell ID under the macro base station and actual sector ID and the first mapping relations table and search the synchronizing sequence of the first corresponding sequence as macro base station.
In addition, in the method, the processing of disposing the second basic sequence collection can comprise: the second mapping relations table of sequence in each combination of determining the sub-district ID of affiliated macro base station of Home eNodeB and sector ID and second sequence sets, and the 3rd mapping relations table of sequence in the id information of definite Home eNodeB and the Home eNodeB ID sequence sets.
Wherein, after having disposed the second basic sequence collection, can concentrate second sequence of searching correspondence from second basic sequence according to the real cell ID of macro base station under the Home eNodeB and the combination and the second mapping relations table of actual sector ID, and, second sequence and the 3rd sequence are made up the synchronizing sequence that obtains Home eNodeB according to the actual id information and the 3rd mapping relations table of Home eNodeB are searched correspondence from Home eNodeB ID sequence sets the 3rd sequence.
Preferably, the mode that second sequence and the 3rd sequence are made up comprise following one of at least: dot product, frequency division combination, combination interweaves.
Preferably, the sequence concentrated of basic sequence and Home eNodeB ID sequence sets comprise following one of at least: the difference sequence of pseudo random sequence, zero correlation sequence, orthogonal sequence, pseudo random sequence, the difference sequence of zero correlation sequence, the difference sequence of orthogonal sequence.
According to a further aspect in the invention, provide a kind of collocation method of auxiliary synchronization channel, be used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured.
Collocation method according to the auxiliary synchronization channel of present embodiment comprises: according to system configuration information the sub-district id information that carries in the synchronizing signal is divided into a plurality of ID subclass; For each ID subclass, configuration is used to represent the type sequence collection of its type, and the basic sequence collection that is used to represent id information in its subclass.
Wherein, system configuration information comprises base station type information and/or multi-carrier configuration information, and wherein, base station type comprises macro base station and/or Home eNodeB and/or relay base station, and the multicarrier configuration comprises that full configuration carrier wave and/or part dispose carrier wave.
And, divide a plurality of ID subclass obtain can comprise following one of at least: macro base station sub-district ID subclass, home base station cells ID subclass, relay base station sub-district ID subclass.
And, the processing of Configuration Type sequence sets and basic sequence collection can comprise following one of at least:
For macro base station sub-district ID subclass, sub-district ID wherein is divided into the sub-district ID in grouping information, the grouping and the interior sector ID information of dividing into groups, and by the type sequence of type sequence collection of configuration represent to dispose full carrier wave respectively, part disposes carrier wave and sub-district ID packet number, and the basic sequence of the basic sequence set by configuration in representing to divide into groups the sub-district id information and the various combinations of the sector ID information in the grouping;
For home base station cells ID subclass, represent home base station cells by the type sequence of type sequence collection of configuration, and the basic sequence of the basic sequence set by configuration is represented the home base station cells id information;
For relay base station sub-district ID subclass, represent relay base station by the type sequence of type sequence collection of configuration, and the basic sequence of the basic sequence set by configuration is represented the relay base station id information.
Further, after having disposed type sequence collection and basic sequence collection, this method can further comprise following processing one of at least:
For macro base station, select corresponding basic sequence according to the sub-district ID of reality and the combination of sector ID from the basic sequence set of configuration, and concentrate the corresponding type sequence combination of macro base station to obtain the synchronizing sequence of the auxiliary synchronization channel of macro base station with type sequence the basic sequence of selecting;
For Home eNodeB, home base station cells ID according to reality selects corresponding basic sequence from the basic sequence set of configuration, and concentrates the corresponding type sequence combination of Home eNodeB to obtain the synchronizing sequence of the auxiliary synchronization channel of Home eNodeB with type sequence the basic sequence of selecting;
For relay base station, relay base station sub-district ID according to reality selects corresponding basic sequence from the basic sequence set of configuration, and concentrates the corresponding type sequence combination of relay base station to obtain the synchronizing sequence of the auxiliary synchronization channel of relay base station with type sequence the basic sequence of selecting.
Preferably, the sequence concentrated of the sequence concentrated of basic sequence and type sequence comprise following one of at least: the difference sequence of pseudo random sequence, zero correlation sequence, orthogonal sequence, pseudo random sequence, the difference sequence of zero correlation sequence, the difference sequence of orthogonal sequence.
According to a further aspect in the invention, provide a sub-carrier mapping method, be used for the synchronizing sequence of ofdm system auxiliary synchronization channel is mapped to subcarrier.
Sub-carrier mapping method according to the present invention comprises: be under the situation of L at useful sub-carrier number, for the subcarrier of subcarrier sequence number less than L/2, carry out the subcarrier mapping of different sectors according to following formula:
x(n)＝x(3u+k)，k＝0，1，2.u＝0，1，2，...，
Wherein, k represents sector number, and u represents the element sequence number in the sequence;
For the subcarrier of subcarrier sequence number, carry out the subcarrier mapping of different sectors according to following formula greater than L/2:
y(n)＝y(3u+mod(k+round(3u/(L/2)))
k)，k＝0，1，2.u＝0，1，2，...，
Wherein, mod is complementation, and round is a rounding operation.
According to a further aspect in the invention, provide a kind of inking device of auxiliary synchronization channel, be used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured.
Inking device according to auxiliary synchronization channel of the present invention comprises: first configuration module is used to dispose the first basic sequence collection of each combination of sub-district ID that the auxiliary synchronization channel that is used to represent macro base station carries and sector ID; And/or second configuration module, be used to dispose second sequence sets of each combination of the sub-district ID of the affiliated macro base station that is used to represent Home eNodeB and sector ID, and the Home eNodeB ID sequence sets that is used to represent the id information of Home eNodeB.
1 according to a further aspect in the invention, and a kind of inking device of auxiliary synchronization channel is provided, and is used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured.
Inking device according to auxiliary synchronization channel of the present invention comprises: divide module, be used for being divided into a plurality of ID subclass according to the sub-district id information that system configuration information is carried synchronizing signal; First configuration module is used for each ID subclass is disposed the type sequence collection that is used to represent corresponding ID subclass type; Second configuration module is used for each ID is disposed the basic sequence collection that is used to represent id information in its subclass of corresponding ID subclass.
According to a further aspect in the invention, provide a sub-carrier mapping device, be used for the synchronizing sequence of ofdm system auxiliary synchronization channel is mapped to subcarrier, wherein, useful sub-carrier number is L.
Subcarrier mapping device according to the present invention comprises: first mapping block is used for according to following formula the subcarrier sequence number being carried out less than the subcarrier of L/2 the subcarrier mapping of different sectors:
x(n)＝x(3u+k)，k＝0，1，2.u＝0，1，2，...，
Wherein, k represents sector number, and u represents the element sequence number in the sequence;
Second mapping block is used for according to following formula the subcarrier sequence number being carried out greater than the subcarrier of L/2 the subcarrier mapping of different sectors:
y(n)＝y(3u+mod(k+round(3u/(L/2)))
k)，k＝0，1，2.u＝0，1，2，...，
Wherein, mod is complementation, and round is a rounding operation.
According to a further aspect in the invention, provide a kind of synchronizing signal launching technique of auxiliary synchronization channel, be used to launch the secondary synchronization sequences of the synchronizing signal of ofdm system.
Synchronizing signal launching technique according to auxiliary synchronization channel of the present invention comprises:
According to the requirement of system to secondary synchronization sequences, the system for base-bandwidth is configured to x=2 with secondary synchronization sequences
n+ c, wherein, x is the length of secondary synchronization sequences, 2
nThe length that is less than or equal to the secondary synchronization sequences of system requirements; For system bandwidth is the system of base-bandwidth multiple, and secondary synchronization sequences is configured to x=m * 2
n+ c, wherein m is a multiple; Secondary synchronization sequences after antenna emission by transmitting terminal is configured.
According to a further aspect in the invention, provide a kind of synchronizing signal emitter of auxiliary synchronization channel, be used to launch the secondary synchronization sequences of the synchronizing signal of ofdm system.
Synchronizing signal emitter according to auxiliary synchronization channel of the present invention comprises: configuration module, be used for the requirement to secondary synchronization sequences according to system, and the system for base-bandwidth is configured to x=2 with secondary synchronization sequences
n+ c, wherein, x is the length of secondary synchronization sequences, 2
nThe length that is less than or equal to the secondary synchronization sequences of system requirements; And be the system of base-bandwidth multiple for system bandwidth, be used for secondary synchronization sequences is configured to x=m * 2
n+ c, wherein m is a multiple; Transmitter module, the secondary synchronization sequences after being used for being configured by antenna emission.
By technique scheme of the present invention, information in the synchronizing signal on the auxiliary synchronization channel in the ofdm system is shone upon and generate synchronizing signal by the sequence in the sequence sets, solve the synchronization channel design scheme in the correlation technique and can not clearly identify the sub-district id information of dissimilar base stations and the problem that can not satisfy the expansion demand of Femto base station, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, help the performance of optimization system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the frame structure of correlation technique;
Fig. 2 is according to the P-SCH of correlation technique and the structural representation of S-SCH;
Fig. 3 is the flow chart according to the collocation method of the auxiliary synchronization channel of the inventive method embodiment one;
Fig. 4 is the processing schematic diagram according to the synchronizing sequence that generates Femto base station auxiliary synchronization channel in the collocation method of the auxiliary synchronization channel of the inventive method embodiment one;
Fig. 5 is the schematic diagram according to an instantiation of the cell group of the embodiment of the invention;
Fig. 6 is the processing schematic diagram according to the subcarrier mapping of the embodiment of the invention;
Fig. 7 is the schematic diagram that carries out the subcarrier mapping according to the carrier mapping method of the embodiment of the invention;
Fig. 8 is the process chart that carries out Cell searching according to the terminal of the embodiment of the invention;
Fig. 9 is the block diagram according to the inking device of the auxiliary synchronization channel of apparatus of the present invention embodiment one;
Figure 10 is the flow chart according to the collocation method of the auxiliary synchronization channel of the inventive method embodiment two;
Figure 11 is the block diagram according to the inking device of the auxiliary synchronization channel of apparatus of the present invention embodiment two;
Figure 12 is the block diagram according to the subcarrier mapping device of apparatus of the present invention embodiment three;
Figure 13 is the flow chart according to the synchronizing signal launching technique of the auxiliary synchronization channel of the inventive method embodiment three;
Figure 14 is the block diagram according to the synchronizing signal emitter of the auxiliary synchronization channel of apparatus of the present invention embodiment four.
Embodiment
Functional overview
The expansion demand problem that can not clearly identify the sub-district id information of dissimilar base stations and can not satisfy the Femto base station at the synchronization channel design scheme in the correlation technique, the present invention proposes the sequence of utilizing in the sequence sets shines upon the information in the synchronizing signal on the auxiliary synchronization channel in the ofdm system, dispose and generate the scheme of synchronizing signal afterwards, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, help the performance of optimization system.
P-SCH and S-SCH structure chart that Fig. 2 is correlated with for the present invention.Based on frame structure shown in Figure 1, shown in the part of the A among Fig. 2, P-SCH 201 and S-SCH 202 send once in superframe respectively, and P-SCH 201 is in the initial transmission of 16m superframe, and first symbol of 2nd the 16m unit frame of S-SCH 202 in superframe sends.Shown in the B part of Fig. 2, P-SCH 201 sends once in superframe, S-SCH 202 sends twice in superframe, P-SCH 201 is in the initial transmission of 16m superframe, S-SCH 202 in superframe the 2nd 16m unit frame and first symbol of the 4th 16m unit frame send.Shown in the part of the C among Fig. 2, P-SCH 201 sends once in superframe, S-SCH 202 sends three times in superframe, P-SCH 201 is in the initial transmission of 16m superframe, and first symbol of 2nd 16m unit frame, 3rd 16m unit frame and 4th the 16m unit frame of S-SCH 202 in superframe sends.
Based on frame structure shown in Figure 1 and channel architecture shown in Figure 2, will describe embodiments of the invention in detail below.
Method embodiment one
In the present embodiment, provide a kind of collocation method of auxiliary synchronization channel, be used for the synchronizing signal on the ofdm system S-SCH is configured.
As shown in Figure 3, the collocation method according to the S-SCH of present embodiment comprises: step S302 and step S304.Need to prove, the step of Miao Shuing can be carried out in the computer system such as a set of computer-executable instructions in the method, and, though figure 3 illustrates logical order, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Below the processing shown in Fig. 3 will be described.
Step S302, configuration is used to represent the first basic sequence collection of each combination of sub-district ID that the S-SCH of macro base station carries and sector ID; And/or
Step S304, configuration is used to represent second sequence sets of each combination of the sub-district ID of affiliated macro base station of Femto base station and sector ID, and the Femto base station IDs sequence sets that is used to represent the id information of Femto base station.
Particularly, the processing of disposing the first basic sequence collection can comprise: each combination of determining sub-district ID that the S-SCH of macro base station carries and sector ID and first basic sequence are concentrated the first mapping relations table of sequence.After having disposed the first basic sequence collection, just can concentrate from first basic sequence and search the synchronizing sequence of the first corresponding sequence as macro base station according to the combination of real cell ID under the macro base station and actual sector ID and the first mapping relations table.For example, the S-SCH of the macro base station information of carrying is by synchronizing sequence
(that is, corresponding to the first above-mentioned sequence) expression.
On the other hand, the S-SCH information of carrying in Femto base station adopts different sequence sets to carry.Particularly, the processing of disposing the second basic sequence collection comprises: the second mapping relations table of sequence in each combination of determining the sub-district ID of affiliated macro base station of Femto base station and sector ID and second sequence sets, and the 3rd mapping relations table of sequence in the id information of definite Femto base station and the Femto base station IDs sequence sets.After having disposed the second basic sequence collection, just can concentrate second sequence of searching correspondence from second basic sequence, and from Femto base station IDs sequence sets, search the 3rd corresponding sequence according to the actual id information and the 3rd mapping relations table of Femto base station according to the real cell ID of macro base station under the Femto base station and the combination and the second mapping relations table of actual sector ID.For example, the sub-district ID and the sector ID information of the macro base station that belonged to of Femto base station are passed through sequence
(corresponding to above-mentioned second sequence) expression.The Femto id information of Femto base station represents by another Femto ID sequence sets, i.e. sequence
(corresponding to above-mentioned the 3rd sequence) expression.
Fig. 4 is according to the processing schematic diagram that generates the synchronizing sequence of Femto base station S-SCH in the collocation method of the S-SCH of present embodiment.As shown in Figure 4, with second sequence
With the 3rd sequence
Make up, that is, calculate
Just can access the synchronizing sequence y (n) of the S-SCH of Femto base station.
Preferably, the mode that second sequence and the 3rd sequence are made up comprises dot product, frequency division combination, combination interweaves.
Preferably, the sequence concentrated of above-mentioned basic sequence and Femto base station IDs sequence sets comprise following one of at least: pseudo random sequence, zero correlation sequence, orthogonal sequence.
By above-mentioned processing, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, help the performance of optimization system.
The processing procedure of present embodiment is described below in conjunction with instantiation.
Fig. 5 is the schematic diagram according to an instantiation of the cell group of the embodiment of the invention.As shown in Figure 5, establishing a system has 126 sub-district ID, and sub-district ID is divided into 3 groups: i=0, and 1,2,42 every group, ID j=0 in the group～41, each sub-district is divided into 3 sector: k=0,1,2.
The information that the S-SCH of macro base station carries is sub-district ID and sector ID information.The information that the S-SCH of Femto base station carries is sub-district ID and the sector ID information and the Femto id information of ownership macro base station.The information that the S-SCH of macro base station carries is by basic sequence set representations, i.e. a synchronizing sequence
Expression.
For the ease of searching, Cell ID that S-SCH that can pre-defined macro base station carries and sector ID and S-SCH basic sequence are concentrated the mapping relations table (corresponding to the above-mentioned first mapping relations table) of sequence sequence number, based on cell group shown in Figure 5, this mapping relations table is as shown in table 1.
Table 1
| Sub-district ID | Sector ID | S-SCH basic synchronization sequence sequence number i |
| ??J＝0 | ??k＝0 | ??0 |
| ??k＝1 | ??1 | |
| ??k＝2 | ??2 | |
| ??J＝1 | ??k＝0 | ??3 |
| ??k＝1 | ??4 | |
| ??k＝2 | ??5 | |
| ??J＝2 | ??k＝0 | ??6 |
| ??k＝1 | ??7 | |
| ??k＝2 | ??8 | |
| ??J＝3 | ??k＝0 | ??9 |
| ??k＝1 | ??10 | |
| ??k＝2 | ??11 | |
| ??... | ??... | ??... |
| ??J＝Ng-1 | ??k＝0 | ??3×Ng-3 |
| ??k＝1 | ??3×Ng-2 | |
| ??k＝2 | ??3×Ng-1 |
According to Cell ID and sector ID, from table 1, find out basic sequence and concentrate the synchronizing sequence of the sequence (corresponding to first sequence of stating) of sequence number correspondence as macro base station.
The S-SCH sequence of macro base station
For length is the sequence of L=432/3=144, the S-SCH sequences y (n) of different sectors is at available subcarrier N
Used3 groups of 144 different sub-carrier positions mappings on=432 subcarriers are without subcarrier zero setting.Fig. 6 is the processing schematic diagram according to the subcarrier mapping of the embodiment of the invention.As shown in Figure 6, mapping mode is as follows:
x(n)＝x(3u+k)，k＝0，1，2.u＝0，1，2，...
When terminal inserts macro base station, carry out following the processing:
Detect P-SCH, the control information of carrying according to P-SCH judges whether to be macro base station (sub-district);
If macro base station detects
Obtain sub-district ID and sector ID;
For the Femto base station, the information that S-SCH carries adopts different sequence sets to carry.The sub-district ID of the macro base station that the Femto base station is belonged to and sector ID information are by a basic sequence set representations, i.e. sequence
Expression.The Femto id information of Femto base station represents by another Femto ID sequence sets, i.e. sequence
Expression.Pre-defined CellID that belongs to and sector ID and S-SCH basic sequence are concentrated the mapping relations table of sequence sequence number, and be as shown in table 1, and the mapping relations table of definition Femto id information and Femto ID sequence sets is as shown in table 2.
Table 2
According to Cell ID and sector ID, from table 1, find out the sequence that basic sequence is concentrated the sequence number correspondence
According to Femto ID, from table 2, find out the sequence of sequence number correspondence in the Femto ID sequence sets
The synchronizing sequence y of Femto base station S-SCH is by sequence
And sequence
Dot product produces.
The S-SCH sequences y (n) of Femto base station is the sequence of L=432/3=144 for length
With
Dot product forms, that is, and and processing shown in Figure 4, sequence
Be ID sequence in the cell set,
Carry Femto ID.
The S-SCH sequences y (n) of Femto base station that is positioned at different sectors is at available subcarrier N
Used3 groups of 144 different sub-carrier positions mappings on=432 subcarriers, without subcarrier zero setting, as shown in Figure 6, the mapping mode of subcarrier is as follows:
Y (n)=y (3u+k), k=0,1,2.u=0,1,2 ..., wherein, k represents sector numbers.
The processing that terminal inserts the Femto base station may further comprise the steps:
Detect P-SCH, the control information of carrying according to P-SCH judges whether the base station into Femto;
If the Femto base station is then detected
With
Obtain sub-district ID and sector ID, and Femto ID;
The subcarrier mapping of S-SCH sequence also can be taked mapping mode shown in Figure 7.
Fig. 7 is the schematic diagram according to the carrier mapping method of the embodiment of the invention.As shown in Figure 7, in carrier mapping method, the subcarrier of three sectors is mapped in the part of subcarrier sequence number less than 432/2=216 according to the embodiment of the invention, according to y (n)=y (3u+k), k=0,1,2.u=0,1,2 ... mode shine upon.
Subcarrier when three sectors is mapped in the part of subcarrier sequence number greater than 432/2=216, then the first sector S-SCH is mapped to the former second sector sub-carrier positions, the second sector S-SCH is mapped to former the 3rd sector sub-carrier positions, the 3rd sector S-SCH is mapped to the former first sector sub-carrier positions, shown in following mathematic(al) representation:
y(n)＝y(3u+mod(k+round(3u/(L/2)))
k)，k＝0，1，2.u＝0，1，2，...
In the formula, mod is complementation, and round is a rounding operation.
Fig. 8 carries out the process chart of Cell searching according to the terminal of the embodiment of the invention.As shown in Figure 8, after synchronous signaling, when terminal is carried out Cell searching, specifically comprise following processing by above-mentioned processing configuration auxiliary synchronization channel:
Terminal obtains base station type by the base station type information that primary synchronization channel (P-SCH) carries;
If macro base station then carries out 82, if the Femto base station then carries out 84;
82, detection S-SCH carries
Sequence, and carry out 83;
83, according to the Cell ID and the sector ID information of mapping relations table 1 acquisition macro base station;
84, terminal detection S-SCH carries
Sequence and
Sequence, and carry out 85;
85, according to mapping relations table 1 and table 2, obtain Cell ID, sector ID and the Femto id information of Femto macro base station that the base station belongs to.
By above-mentioned processing, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, help the performance of optimization system.
Device embodiment one
In the present embodiment, provide a kind of inking device of auxiliary synchronization channel, be used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured.
As shown in Figure 9, the inking device according to the auxiliary synchronization channel of present embodiment comprises: first configuration module 92 and second configuration module 94.
The function of each module is as follows among Fig. 9:
According to the device of present embodiment can be under cell portion situation shown in Figure 5 the synchronizing signal of execution graph 3 and processing configuration auxiliary synchronization channel shown in Figure 4, its processing procedure no longer repeats here.
By device according to present embodiment, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, help the performance of optimization system.
Method embodiment two
In the present embodiment, provide a kind of collocation method of auxiliary synchronization channel, be used for the synchronizing signal on the ofdm system S-SCH is configured.
As shown in figure 10, the collocation method according to the auxiliary synchronization channel of present embodiment comprises step S1002 and step S1004.
Processing procedure shown in Figure 10 is as follows:
Step S1002 is divided into a plurality of ID subclass according to system configuration information with the sub-district id information that carries in the synchronizing signal;
Step S1004, for each ID subclass, configuration is used to represent the type sequence collection of its type, and the basic sequence collection that is used to represent ID in its subclass.
That is to say that above-mentioned each ID subclass represents by the combination of two different sequence sets that respectively a sequence is the basic sequence set, the sub-district ID in the expression subclass, another is the subclass sign for type sequence set, type sequence, is used to distinguish subclass.
Wherein, system configuration information comprises base station type information and/or multi-carrier configuration information, and wherein, base station type comprises macro base station and/or Femto base station and/or relay base station, and the multicarrier configuration comprises that full configuration carrier wave and/or part dispose carrier wave.
And, divide a plurality of ID subclass obtain comprise following one of at least: macro base station sub-district ID subclass, Femto base station cell ID subclass, relay base station sub-district ID subclass.
At this moment, the processing of Configuration Type sequence sets and basic sequence collection comprise following one of at least:
For macro base station sub-district ID subclass, sub-district ID wherein is divided into the sub-district ID in grouping information, the grouping and the interior sector ID information of dividing into groups, and by the type sequence of type sequence collection of configuration represent to dispose full carrier wave respectively, part disposes carrier wave and sub-district ID packet number, and the basic sequence of the basic sequence set by configuration in representing to divide into groups the sub-district id information and the various combinations of the sector ID information in the grouping;
For Femto base station cell ID subclass, represent the Femto base station cell by the type sequence of type sequence collection of configuration, and the basic sequence of the basic sequence set by configuration is represented Femto base station cell id information;
For relay base station sub-district ID subclass, represent relay base station by the type sequence of type sequence collection of configuration, and the basic sequence of the basic sequence set by configuration is represented the relay base station id information.
After having disposed type sequence collection and basic sequence collection, this method can further comprise following processing one of at least:
For macro base station, select corresponding basic sequence according to the sub-district ID of reality and the combination of sector ID from the basic sequence set of configuration, and concentrate the corresponding type sequence combination of macro base station to obtain the synchronizing sequence of the S-SCH of macro base station with type sequence the basic sequence of selecting;
For the Femto base station, Femto base station cell ID according to reality selects corresponding basic sequence from the basic sequence set of configuration, and concentrates the corresponding type sequence combination in Femto base station to obtain the synchronizing sequence of the S-SCH of Femto base station with type sequence the basic sequence of selecting;
For relay base station, relay base station sub-district ID according to reality selects corresponding basic sequence from the basic sequence set of configuration, and concentrates the corresponding type sequence combination of relay base station to obtain the synchronizing sequence of the S-SCH of relay base station with type sequence the basic sequence of selecting.
Preferably, the sequence concentrated of the sequence concentrated of basic sequence and type sequence comprise following one of at least: pseudo random sequence, zero correlation sequence, orthogonal sequence.
By above-mentioned processing, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, help the performance of optimization system.
Preferably, according to said system configuration information classification, the division of sub-district ID set subclass is divided into macrocell ID subclass (comprising that full configuration carrier wave and part dispose carrier wave), Femto sub-district ID subclass, Relay ID subclass and the reservation ID subclass that is used to expand etc.
For the configuration of each mapping relations table, handle as follows:
Pre-defined Cell ID grouping information and/or base station type and/or multicarrier information and type sequence are concentrated the mapping relations table of corresponding sequence sequence number, as shown in table 3, Cell ID packet count 〉=1 in the table represents that promptly system does not carry out Cell ID grouping if Cell ID packet count equals 1.At this moment, the Cell ID in the grouping is Cell ID.The mapping relations table of Cell ID (or group in Cell ID) and sector auxiliary information and the concentrated corresponding sequence sequence number of basic sequence, as shown in table 1.Femto ID and basic sequence are concentrated the mapping relations table of corresponding sequence sequence number, and be as shown in table 4.Relay ID and basic sequence are concentrated the mapping relations table of corresponding sequence sequence number, and be as shown in table 5.
And,, can from mapping relations table 3, find out type sequence and concentrate corresponding sequence m (i) according to Cell ID grouping information and/or base station type and/or multicarrier information.
Table 3
Table 4
Table 5
Wherein, for macro base station,, can from mapping relations table 1, find out the sequence p (i) that basic sequence is concentrated the sequence number correspondence according to Cell ID and sector ID; For the Femto base station,, can from mapping relations table 4, find out the sequence p (i) that basic sequence is concentrated the sequence number correspondence according to Femto ID; For the Relay station,, can from mapping relations table 5, find out the sequence p (i) that basic sequence is concentrated the sequence number correspondence according to Relay ID.The synchronizing sequence S of S-SCH is as follows by sequence m (i) and sequence p (i) dot-product operation:
S＝m(i)⊙p(i)。
By above-mentioned processing, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, help the performance of optimization system.
Device embodiment two
In the present embodiment, provide a kind of inking device of auxiliary synchronization channel, be used for the synchronizing signal on the ofdm system S-SCH is configured.
As shown in figure 11, the inking device according to the auxiliary synchronization channel of present embodiment comprises: divide module 112, first configuration module 114, second configuration module 116.
The function of each module is as follows among Figure 11:
First configuration module 114 is connected to and divides module 112, is used for each ID subclass is disposed the type sequence collection that is used to represent corresponding ID subclass type;
Second configuration module 116 is divided module 112, is used for each ID is disposed the basic sequence collection of ID in the subclass that is used to represent the corresponding ID subclass.
This device can carry out the synchronous signaling configuration of auxiliary synchronization channel based on the mapping relations shown in the table 1,3,4,5 equally, and its processing procedure no longer repeats here.
Device embodiment three
In the present embodiment, provide a sub-carrier mapping device, be used for the synchronizing sequence of ofdm system S-SCH is mapped to subcarrier, wherein, supposed that useful sub-carrier number is L.
As shown in figure 12, the subcarrier mapping device according to present embodiment comprises first mapping block 122 and second mapping block 124.
The function of each module is as follows among Figure 12:
x(n)＝x(3u+k)，k＝0，1，2.u＝0，1，2，...，
Wherein, k represents sector number, and u represents the element sequence number in the sequence;
y(n)＝y(3u+mod(k+round((3u+k)/(L/2)))
k)，k＝0，1，2.u＝0，1，2，...，
Wherein, mod is complementation, and round is a rounding operation.
This device can carry out the mapping of subcarrier according to mapping mode shown in Figure 7, thereby realizes the transmission of the synchronizing signal of auxiliary synchronization channel.
Method embodiment three
In the present embodiment, provide a kind of synchronizing signal launching technique of auxiliary synchronization channel, be used to launch the secondary synchronization sequences of the synchronizing signal of ofdm system.
As shown in figure 13, the synchronizing signal launching technique according to the auxiliary synchronization channel of present embodiment comprises step S1302 and step S1304.
Concrete processing procedure shown in Figure 13 is as follows:
Step S1302, according to the requirement of system to secondary synchronization sequences, the system for base-bandwidth is configured to x=2 with secondary synchronization sequences
n+ c, wherein, x is the length of secondary synchronization sequences, 2
nThe length that is less than or equal to the secondary synchronization sequences of system requirements; For system bandwidth is the system of base-bandwidth multiple m, and secondary synchronization sequences is configured to x=m * 2
n+ c, wherein m is a multiple;
Step S1304, the secondary synchronization sequences after the antenna emission by transmitting terminal is configured.
By method, can realize the transmission of secondary synchronization sequences according to present embodiment.
Device embodiment four
In the present embodiment, provide a kind of synchronizing signal emitter of auxiliary synchronization channel, be used to launch the secondary synchronization sequences of the synchronizing signal of ofdm system.
As shown in figure 14, the synchronizing signal emitter according to the auxiliary synchronization channel of present embodiment comprises: configuration module 142 and transmitter module 144.
By device, can realize the transmission of secondary synchronization sequences according to present embodiment.
In sum, by means of technique scheme of the present invention, information in the synchronizing signal on the auxiliary synchronization channel in the ofdm system is shone upon and generate synchronizing signal by the sequence in the sequence sets, the synchronization channel design scheme in the correlation technique that solved can not clearly not identify the sub-district id information of dissimilar base stations, and the problem that can not satisfy the expansion demand of Femto base station, the type and the id information of each base station clearly can be identified out, and can adapt to the various changes of base station neatly, the performance that helps optimization system, and can satisfy the quick access demand of terminal under the scene of system deployment lot of F emto base station.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1. the collocation method of an auxiliary synchronization channel is used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured, and it is characterized in that described method comprises:
Configuration is used to represent the first basic sequence collection of each combination of sub-district ID that the auxiliary synchronization channel of macro base station carries and sector ID; And/or
Configuration is used to represent second sequence sets of each combination of the sub-district ID of affiliated macro base station of Home eNodeB and sector ID, and the Home eNodeB ID sequence sets that is used to represent the id information of described Home eNodeB.
2. method according to claim 1 is characterized in that, the processing of disposing the described first basic sequence collection comprises:
Each combination of determining sub-district ID that the auxiliary synchronization channel of described macro base station carries and sector ID and described first basic sequence are concentrated the first mapping relations table of sequence.
3. method according to claim 2 is characterized in that, after having disposed the described first basic sequence collection, further comprises:
Concentrate from described first basic sequence according to the combination of real cell ID under the described macro base station and actual sector ID and the described first mapping relations table and to search the synchronizing sequence of the first corresponding sequence as described macro base station.
4. method according to claim 1 is characterized in that, the processing of disposing the described second basic sequence collection comprises:
The second mapping relations table of sequence in each combination of determining the sub-district ID of affiliated macro base station of Home eNodeB and sector ID and second sequence sets, and the 3rd mapping relations table of determining sequence in the id information of described Home eNodeB and the Home eNodeB ID sequence sets.
5. method according to claim 4 is characterized in that, after having disposed the described second basic sequence collection, further comprises:
Concentrate second sequence of searching correspondence from described second basic sequence according to the real cell ID of macro base station under the described Home eNodeB and combination and the described second mapping relations table of actual sector ID, and, described second sequence and described the 3rd sequence are made up the synchronizing sequence that obtains described Home eNodeB according to the actual id information and described the 3rd mapping relations table of described Home eNodeB are searched correspondence from described Home eNodeB ID sequence sets the 3rd sequence.
6. method according to claim 5 is characterized in that, the mode that described second sequence and described the 3rd sequence are made up comprise following one of at least: dot product, frequency division combination, combination interweaves.
7. according to each described method in the claim 1 to 5, it is characterized in that, sequence that described basic sequence is concentrated and described Home eNodeB ID sequence sets comprise following one of at least: the difference sequence of pseudo random sequence, zero correlation sequence, orthogonal sequence, described pseudo random sequence, the difference sequence of described zero correlation sequence, the difference sequence of described orthogonal sequence.
8. the collocation method of an auxiliary synchronization channel is used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured, and it is characterized in that described method comprises:
According to system configuration information the sub-district id information that carries in the described synchronizing signal is divided into a plurality of ID subclass;
For each ID subclass, configuration is used to represent the type sequence collection of its type, and the basic sequence collection that is used to represent id information in its subclass.
9. method according to claim 8, it is characterized in that, described system configuration information comprises base station type information and/or multi-carrier configuration information, wherein, base station type comprises macro base station and/or Home eNodeB and/or relay base station, and the multicarrier configuration comprises that full configuration carrier wave and/or part dispose carrier wave.
10. method according to claim 9 is characterized in that, divide the described a plurality of ID subclass obtain comprise following one of at least: macro base station sub-district ID subclass, home base station cells ID subclass, relay base station sub-district ID subclass.
11. method according to claim 10 is characterized in that, the processing of disposing described type sequence collection and described basic sequence collection comprise following one of at least:
For described macro base station sub-district ID subclass, sub-district ID wherein is divided into the sub-district ID in grouping information, the grouping and the interior sector ID information of dividing into groups, and by the type sequence of described type sequence collection of configuration represent to dispose full carrier wave respectively, part disposes carrier wave and sub-district ID packet number, and the basic sequence of the described basic sequence set by configuration in representing to divide into groups the sub-district id information and the various combinations of the sector ID information in the grouping;
For described home base station cells ID subclass, represent home base station cells by the type sequence of described type sequence collection of configuration, and the basic sequence of the described basic sequence set by configuration is represented the home base station cells id information;
For described relay base station sub-district ID subclass, represent relay base station by the type sequence of described type sequence collection of configuration, and the basic sequence of the described basic sequence set by configuration is represented the relay base station id information.
12. method according to claim 11 is characterized in that, after having disposed described type sequence collection and described basic sequence collection, further comprise following processing one of at least:
For macro base station, select corresponding basic sequence according to the sub-district ID of reality and the combination of sector ID from the basic sequence set of configuration, and concentrate the corresponding type sequence combination of described macro base station to obtain the synchronizing sequence of the auxiliary synchronization channel of described macro base station with described type sequence the basic sequence of selecting;
For Home eNodeB, home base station cells ID according to reality selects corresponding basic sequence from the basic sequence set of configuration, and concentrates the corresponding type sequence combination of described Home eNodeB to obtain the synchronizing sequence of the auxiliary synchronization channel of described Home eNodeB with described type sequence the basic sequence of selecting;
For relay base station, relay base station sub-district ID according to reality selects corresponding basic sequence from the basic sequence set of configuration, and concentrates the corresponding type sequence combination of described relay base station to obtain the synchronizing sequence of the auxiliary synchronization channel of described relay base station with described type sequence the basic sequence of selecting.
13. each described method in 12 according to Claim 8, it is characterized in that, the sequence that sequence that described basic sequence is concentrated and described type sequence are concentrated comprise following one of at least: the difference sequence of pseudo random sequence, zero correlation sequence, orthogonal sequence, described pseudo random sequence, the difference sequence of described zero correlation sequence, the difference sequence of described orthogonal sequence.
14. a sub-carrier mapping method is used for the synchronizing sequence of ofdm system auxiliary synchronization channel is mapped to subcarrier, it is characterized in that described method comprises:
At useful sub-carrier number is under the situation of L, for the subcarrier of subcarrier sequence number less than L/2, carries out the subcarrier mapping of different sectors according to following formula:
x(n)＝x(3u+k)，k＝0，1，2.u＝0，1，2，...，
Wherein, k represents sector number, and u represents the element sequence number in the sequence;
For the subcarrier of subcarrier sequence number, carry out the subcarrier mapping of different sectors according to following formula greater than L/2:
y(n)＝y(3u+mod(k+round(3u/(L/2)))
k)，k＝0，1，2.u＝0，1，2，...，
Wherein, mod is complementation, and round is a rounding operation.
15. the inking device of an auxiliary synchronization channel is used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured, and it is characterized in that described device comprises:
First configuration module is used to dispose the first basic sequence collection of each combination of sub-district ID that the auxiliary synchronization channel that is used to represent macro base station carries and sector ID; And/or
Second configuration module is used to dispose second sequence sets of each combination of the sub-district ID of the affiliated macro base station that is used to represent Home eNodeB and sector ID, and the Home eNodeB ID sequence sets that is used to represent the id information of described Home eNodeB.
16. the inking device of an auxiliary synchronization channel is used for the synchronizing signal on the ofdm system auxiliary synchronization channel is configured, and it is characterized in that described device comprises:
Divide module, be used for being divided into a plurality of ID subclass according to the sub-district id information that system configuration information is carried described synchronizing signal;
First configuration module is used for each ID subclass is disposed the type sequence collection that is used to represent corresponding ID subclass type;
Second configuration module is used for described each ID is disposed the basic sequence collection that is used to represent id information in its subclass of corresponding ID subclass.
17. a sub-carrier mapping device is used for the synchronizing sequence of ofdm system auxiliary synchronization channel is mapped to subcarrier, wherein, useful sub-carrier number is L, it is characterized in that, described device comprises:
First mapping block is used for according to following formula the subcarrier sequence number being carried out less than the subcarrier of L/2 the subcarrier mapping of different sectors:
x(n)＝x(3u+k)，k＝0，1，2.u＝0，1，2，...，
Wherein, k represents sector number, and u represents the element sequence number in the sequence;
Second mapping block is used for according to following formula the subcarrier sequence number being carried out greater than the subcarrier of L/2 the subcarrier mapping of different sectors:
y(n)＝y(3u+mod(k+round(3u/(L/2)))
k)，k＝0，1，2.u＝0，1，2，...，
Wherein, mod is complementation, and round is a rounding operation.
18. the synchronizing signal launching technique of an auxiliary synchronization channel is used to launch the secondary synchronization sequences of the synchronizing signal of ofdm system, it is characterized in that described method comprises:
According to the requirement of system to secondary synchronization sequences, the system for base-bandwidth is configured to x=2 with secondary synchronization sequences
n+ c, wherein, x is the length of secondary synchronization sequences, 2
nThe length that is less than or equal to the secondary synchronization sequences of system requirements; For system bandwidth is the system of base-bandwidth multiple m, and secondary synchronization sequences is configured to x=m * 2
n+ c;
Described secondary synchronization sequences after antenna emission by transmitting terminal is configured.
19. the synchronizing signal emitter of an auxiliary synchronization channel is used to launch the secondary synchronization sequences of the synchronizing signal of ofdm system, it is characterized in that described device comprises:
Configuration module is used for the requirement to secondary synchronization sequences according to system, and the system for base-bandwidth is configured to x=2 with secondary synchronization sequences
n+ c, wherein, x is the length of secondary synchronization sequences, 2
nThe length that is less than or equal to the secondary synchronization sequences of system requirements; For system bandwidth is the system of base-bandwidth multiple m, and secondary synchronization sequences is configured to x=m * 2
n+ c;
Transmitter module, the described secondary synchronization sequences after being used for being configured by antenna emission.
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