CN102006257A - Pilot frequency sending method of multicast broadcasting service - Google Patents
Pilot frequency sending method of multicast broadcasting service Download PDFInfo
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- CN102006257A CN102006257A CN2009101718297A CN200910171829A CN102006257A CN 102006257 A CN102006257 A CN 102006257A CN 2009101718297 A CN2009101718297 A CN 2009101718297A CN 200910171829 A CN200910171829 A CN 200910171829A CN 102006257 A CN102006257 A CN 102006257A
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Abstract
The invention relates to a pilot frequency sending method of a multicast broadcasting service, which is applied to a wireless communication system adopting an OFDM (Orthogonal Frequency Division Multiplexing) technology. The pilot frequency sending method comprises the following steps that: a base station or a wireless relay station sends pilot frequencies to a terminal in an area of a downlink subframe, which is used for sending multicast broadcasting service data; and 6 or 12 pilot frequencies are correspondingly sent for each data stream in each type 1 PRU (Physical Resource Unit) in the area. The invention can meet the requirements of multicast broadcasting service transmission on the property of channel estimation.
Description
Technical field
(Orthogonal Frequency Division Multiplexing, OFDM) wireless communication system more specifically, relates to the pilot sending method of Multimedia Broadcast Multicast Service in this system to the present invention relates to OFDM.
Background technology
Multicast and multicast and broadcast are a kind of technology that transmits data message from a data source to a plurality of targets.In traditional mobile network, cell multicast broadcasting service (CBS:Cell Broadcast Service) allows low bit rate data to share the multicast and broadcast channel to all users' transmissions by the sub-district, belongs to information series business.Now, people no longer are satisfied with phone and messaging service to the demand of mobile communication, fast development along with the Internet, a large amount of multimedia services emerge, the some of them applied business requires a plurality of users can receive identical data simultaneously, as video request program, TV multicast and broadcast, video conference, online education and interactive game etc.These mobile multi-media services are compared with general data, have that data volume is big, characteristics such as longer duration and delay sensitive.And the Short Message Service that the Multimedia Broadcast Multicast Service of point-to-multipoint can only be carried out text formatting at present as cell multicast is broadcasted, can not satisfy the demand of diversified services such as audio frequency and video and data, in order to effectively utilize mobile network resource, in the third generation and the 4th generation wireless communication standard, multicast and Multimedia Broadcast Multicast Service (MBMS:Multimedia Broadcast/MulticastService) have been proposed, such as MBS (the E-MBS:Enhanced MulticastBroadcast Service) business that in IEEE 802.16m standard, has just proposed Multimedia Broadcast Multicast Service (MBS:Multicast and Broadcast Service) and enhancement mode.
Because present wireless communication system has just been considered ordinary individual's communication service scene, and has not been considered the scene of Multimedia Broadcast Multicast Service when the pilot tone of design down link.But the wireless channel time delay of Personal Communications Services application scenarios correspondence is less relatively, and for the Multimedia Broadcast Multicast Service scene, especially identical networking (SFN:Same Frequency Network) multicast and broadcast application scenarios, the signal that each receiving terminal receives from a plurality of base stations on every side through the sample after the different time delays, therefore, at receiving terminal, its corresponding wireless channel has very large multidiameter, and it is very abundant to postpone the footpath, this has very large frequency selective fading with regard to causing the Multimedia Broadcast Multicast Service channel with respect to the general service channel, so the pilot frequency format under the general service channel no longer has been applicable to the Multimedia Broadcast Multicast Service scene.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of pilot sending method of Multimedia Broadcast Multicast Service, can satisfy the Multimedia Broadcast Multicast Service transmission to the performance for estimating channel requirement.
In order to address the above problem, the invention provides a kind of pilot sending method of Multimedia Broadcast Multicast Service, be applied to adopt the wireless communication system of OFDM (OFDM) technology, comprising:
Base station or wireless relay stand in the zone that descending sub frame is used for sending multicast broadcast service data and send pilot tone to terminal, in the physical resource unit of each Class1 in this zone (PRU), for the corresponding number of pilots that sends of each data flow is 6 or 12.
Further, above-mentioned pilot sending method also can have following characteristics:
The number of pilots of each data flow correspondence is 6 o'clock among the PRU of described Class1, and the position of the pilot tone of each data flow correspondence in PRU one of meets the following conditions or combination in any:
Condition one, the number on the prosign is 2 to the maximum, and the index of any two adjacent pilot tone place subcarrier in frequency domain differs 4 subcarriers at most on the frequency domain of each data flow correspondence;
Condition two, the pilot tone of each data flow correspondence is distributed on the 1st, 2,5,6 symbols among the described PRU, perhaps is distributed on each symbol among the described PRU.
Further, above-mentioned pilot sending method also can have following characteristics:
The number of pilots of each data flow correspondence is 6 o'clock among the PRU of described Class1, and the Resource Unit at 6 pilot tone places of one of them data flow is RE (1,1), RE (3,5), RE (7,2), RE (11,5), RE (15,2), RE (17,6); Perhaps, RE (1,1), RE (3,5), RE (7,4), RE (11,3), RE (15,2), RE (17,6); Perhaps, RE (1,1), RE (5,5), RE (7,2), RE (11,5), RE (13,2), RE (17,6); Perhaps, RE (1,5), RE (5,3), RE (9,1), RE (9,6), RE (13,4), RE (17,2), wherein, RE (x, y) being expressed as sub-carrier indices is x, and notation index is the Resource Unit of y, and sub-carrier indices is that the index with the Resource Unit place subcarrier on angle among the PRU is made as 1, the index of adjacent sub-carrier adds one successively and obtains, notation index is that the index with this Resource Unit place symbol is made as 1, and the index of adjacent-symbol adds one successively and obtains.
Further, above-mentioned pilot sending method also can have following characteristics:
The number of pilots of each data flow correspondence is 12 o'clock among the PRU of described Class1, one or combination in any during the position of the pilot tone of each data flow correspondence in PRU meets the following conditions:
Condition one, the number on prosign is 3 to the maximum, and the index of any two adjacent pilot tone place subcarrier in frequency domain differs 3 subcarriers at most on the frequency domain of each data flow correspondence;
Condition two, the number of the pilot tone of each data flow correspondence on each symbol of described PRU is at least 1;
Condition three, the pilot tone of each data flow correspondence is 2 at first symbol of described PRU and the number on last symbol, more than 3 or 3.
Further, above-mentioned pilot sending method also can have following characteristics:
The number of pilots of each data flow correspondence is 12 o'clock among the PRU of described Class1, and the Resource Unit at 12 pilot tone places of one of them data flow correspondence is respectively:
RE (1,1), RE (1,6), RE (3,4), RE (5,2), RE (7,4), RE (9,1), RE (9,6), RE (11,3), RE (13,5), RE (15,3), RE (17,1), RE (17,6); Perhaps
RE (1,1), RE (2,6), RE (4,4), RE (5,2), RE (8,4), RE (9,1), RE (10,6), RE (11,3), RE (14,5), RE (15,3), RE (17,1), RE (18,6); Perhaps
RE (1,2), RE (1,6), RE (3,4), RE (5,2), RE (7,4), RE (9,1), RE (9,6), RE (11,3), RE (13,5), RE (15,3), RE (17,1), RE (17,5); Perhaps
RE(1，2)，RE(2，6)，RE(4，4)，RE(5，2)，RE(8，4)，RE(9，1)，RE(10，6)，RE(11，3)，RE(14，5)，RE(15，3)，RE(17，1)，RE(18，5)；
Wherein, RE (x, y) being expressed as sub-carrier indices is x, notation index is the Resource Unit of y, sub-carrier indices is that the index with the Resource Unit place subcarrier on angle among the PRU is made as 1, the index of adjacent sub-carrier adds one successively and obtains, notation index is that the index with this Resource Unit place symbol is made as 1, and the index of adjacent-symbol adds one successively and obtains.
Further, above-mentioned pilot sending method also can have following characteristics:
Base station or wireless relay stand in when sending pilot tone among the PRU of descending subframe for each type 2 of zone of transmission multicast broadcast service data; The number of pilots and the position that send on 6 symbols of the number of the pilot tone that sends on front 6 symbols of the PRU of described type 2 and position and the PRU of Class1 are identical; Among the number of the pilot tone that sends on the 7th symbol of the PRU of described type 2 and the PRU of frequency domain position and Class1 the 1st; 2; 3; 4; The number of the pilot tone that sends on 5 or 6 symbols is identical with the frequency domain position
Further, above-mentioned pilot sending method also can have following characteristics:
Base station or wireless relay stand in when sending pilot tone among the PRU of each type 3 in zone that descending sub frame is used for sending multicast broadcast service data, and the number and the position of the pilot tone that sends on the zone that preceding 5 symbols in 6 symbols of the number of the pilot tone that sends on 5 symbols of the PRU of described type 3 and position and the PRU of Class1 are formed or the zone of other any 5 symbols compositions are identical.
Further, above-mentioned pilot sending method also can have following characteristics:
Base station or wireless relay stand among each PRU when sending two data flow, and the pilot tone of second the data flow correspondence pilot tone corresponding with first data flow is corresponding one by one, and two pilot tones of correspondence are positioned on the adjacent sub-carrier of prosign.
Further, above-mentioned pilot sending method also can have following characteristics:
Before base station or wireless relay stand in and send pilot tone, select the number of pilots and the pilot frequency format of described each stream of employing earlier according to the spacing of base station or radio repeater station, and the notice terminal.
Further, above-mentioned pilot sending method also can have following characteristics:
When the spacing between described base station and/or the radio repeater station was N1, the number of pilots of each data flow correspondence was 6 among the described PRU, wherein 0＜N1＜5000m;
When the spacing between described base station and/or the radio repeater station was N2, the number of pilots of each data flow correspondence was 12 among the described PRU, 0＜N2＜100000 meter wherein, N1＜N2.
The pilot configuration that such scheme proposes is evenly distributed in pilot tone on the frequency domain at the big characteristics of multicast and broadcast selectivity of channel frequency decline, makes and all is distributed with pilot tone on the more subcarrier.Simultaneously, in order to overcome the time selective fading of channel, pilot tone also is evenly distributed on the symbol of time domain.Make terminal utilize pilot tone to estimate channel conditions accurately,, can satisfy the Multimedia Broadcast Multicast Service transmission requirements through simulating, verifying.
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 (a) is the structural representation of the PRU of Class1 in the existing IEEE 802.16m standard;
Fig. 1 (b) is the structural representation of the PRU of type 2 in the existing IEEE 802.16m standard;
Fig. 1 (c) is the structural representation of the PRU of type 3 in the existing IEEE 802.16m standard;
Fig. 2 (a) and Fig. 2 (b) are the schematic diagrames of the pilot frequency format of the embodiment of the invention 1;
Fig. 3 (a) and Fig. 3 (b) are the schematic diagrames of the pilot frequency format of the embodiment of the invention 2;
Fig. 4 (a) and Fig. 4 (b) are the schematic diagrames of the pilot frequency format of the embodiment of the invention 3;
Fig. 5 (a) and Fig. 5 (b) are the schematic diagrames of the pilot frequency format of the embodiment of the invention 4;
Fig. 6 (a) and Fig. 6 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 5;
Fig. 7 (a) and Fig. 7 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 6;
Fig. 8 (a) and Fig. 8 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 7;
Fig. 9 (a) and Fig. 9 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 8;
Figure 10 (a) and Figure 10 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 9;
Figure 11 (a) and Figure 11 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 10;
Figure 12 (a) and Figure 12 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 11;
Figure 13 (a) and Figure 13 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 12;
Figure 14 (a) and Figure 14 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 13;
Figure 15 (a) and Figure 15 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 14;
Figure 16 (a) and Figure 16 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 15;
Figure 17 (a) and Figure 17 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 16;
Figure 18 (a) and Figure 18 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 17;
Figure 19 (a) and Figure 19 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 18;
Figure 20 (a) and Figure 20 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 19;
Figure 21 (a) and Figure 21 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 20;
Figure 22 (a) and Figure 22 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 21;
Figure 23 (a) and Figure 23 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 22;
Figure 24 (a) and Figure 24 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 23;
Figure 25 (a) and Figure 25 (b) are the schematic diagrames according to the pilot frequency format of the embodiment of the invention 24.
Embodiment
The physical resource unit (PRU:PhysicalResource Unit) that defines in the present stage IEEE 802.16m standard is made of certain running time-frequency resource, as shown in Figure 1.The Resource Unit of Fig. 1 (a) is the PRU of Class1, and it comprises 18 carrier waves at frequency domain, and time domain comprises 6 symbols (being the OFDM symbol); Fig. 1 (b) Resource Unit is the PRU of type 2, and it comprises 18 carrier waves at frequency domain, and time domain comprises 7 symbols; Fig. 1 (c) Resource Unit is the PRU of type 3, and it comprises 18 carrier waves at frequency domain, and time domain comprises 5 symbols, and these physical resource unit can be used for the pilot tone of carries downlink, realizes Multimedia Broadcast Multicast Service.Each formatter is represented a Resource Unit (RE) among the figure.Each grid is represented a Resource Unit (RE) among the figure, and a RE is the least unit of running time-frequency resource, takies a symbol on time domain, takies a subcarrier on the frequency domain.Among Fig. 1, sub-carrier indices is that the index with the Resource Unit place subcarrier on angle among the PRU is made as 1, the index of adjacent sub-carrier adds one successively and obtains, notation index is that the index with this Resource Unit place symbol is made as 1, and the index of adjacent-symbol adds one successively and obtains.
Describe the specific implementation method that the present invention is directed to these three kinds of PRU propositions in detail below in conjunction with accompanying drawing.
Base station (or radio repeater station) is used for sending the zone of multicast broadcast service data to terminal transmission pilot tone at descending sub frame, wherein, among each PRU of the descending sub frame of embodiment 1 to embodiment 12, the number of pilots of each data flow correspondence is 6, and being applied to station spacing is first kind of scene of N1; Among each PRU of the descending sub frame of embodiment 13 to embodiment 24, the number of pilots of each data flow correspondence is 12, and being applied to station spacing is second kind of scene of N2.Wherein, 0＜N1＜5000m, 0＜N2＜100000 meter, and N1＜N2 is arranged, and as N1=1500 rice, N2=5000 rice.
Base station or wireless relay stand in can send a data flow or two data flow among each PRU, when sending two data flow, the pilot tone of second the data flow correspondence pilot tone corresponding with first data flow is corresponding one by one, and two corresponding pilot tones are positioned on the adjacent sub-carrier of prosign.
Base station (or radio repeater station) is selected the number of pilots and the pilot frequency format of described each stream of employing earlier according to the spacing of base station or radio repeater station before sending pilot tone, and the notice terminal.
In embodiment 1 to 12, the number of pilots of each data flow correspondence is 6 o'clock among the PRU of Class1, the position of the pilot tone of each data flow correspondence in PRU one of meets the following conditions or combination in any: condition one, number on the prosign is 2 to the maximum, the index of any two adjacent pilot tone place subcarrier in frequency domain differs 4 subcarriers at most on the frequency domain of each data flow correspondence; Condition two, the pilot tone of each data flow correspondence is distributed on the 1st, 2,5,6 symbols among the described PRU, perhaps is distributed on each symbol among the described PRU.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations, first kind is the base station sends a data flow in a PRU situation, and second kind is the base station sends two data flow in a PRU situation.Each data flow corresponding pilot tone (being frequency pilot sign) number in a PRU is 6 under these two kinds of situations.The grid that is filled with " 1 " among the figure represents corresponding to the position of the pilot tone of first data flow, and the grid that is filled with " 2 " is represented the position corresponding to the pilot tone of second data flow.Below each embodiment herewith, repeat no more.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU need meet the following conditions:
Only, on 5,6 symbols pilot tone is set, does not have pilot tone on the 3rd, 4 symbol the 1st, 2;
Number of pilots on prosign is 1 or 2, and on the prosign absolute value of the difference of the sub-carrier indices at two pilot tone places more than or equal to 6; And
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 2 or 4 on the frequency domain.
In addition, can be in PRU be positioned on the 1st symbol on the RE of the 1st subcarrier and arrange a pilot tone.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow add 1 (or subtracting 1) and symbol constant, 6 RE that obtain are as the RE corresponding to 6 pilot tone places of second data flow.6 pilot tones that also are about to second data flow be separately positioned on identical with 6 pilot tone places of first data flow RE symbol and 6 RE that subcarrier is adjacent on, second data flow does not have pilot tone to send on the 3rd, 4 symbol of PRU yet.
Fig. 2 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 6 pilot tone places is respectively RE (1 among the PRU, 1), RE (3,5), RE (7,2), RE (11,5), RE (15,2), RE (17,6), wherein, RE (x, y) being expressed as sub-carrier indices is x, notation index is the Resource Unit of y.Need to prove, be a lot of according to the available pilot configuration of above-mentioned condition, and this that is not limited to that Fig. 2 (a) illustrates is a kind of.Correspondingly, shown in Fig. 2 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,1), RE (4,5), RE (8,2), RE (12,5), RE (16,2), RE (18,6).
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 7.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 1 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 1 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol on the 7th symbol, perhaps with the 1st～6 symbol on any one symbol the frequency domain position of pilot tone all inequality.
An example of present embodiment is shown in Fig. 3 (a) and Fig. 3 (b), Fig. 3 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Fig. 2 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Fig. 2 (a) on the 1st symbol the frequency domain position of pilot tone identical.Fig. 3 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Fig. 2 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Fig. 2 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 5.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 1 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Fig. 4 (a) and Fig. 4 (b), Fig. 4 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with preceding 5 symbols of Fig. 2 (a) on 5 symbols, Fig. 4 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of pilot tone is identical with preceding 5 symbols of Fig. 2 (b) on 5 symbols.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, each data flow corresponding number of pilots in a PRU is 6 under these two kinds of situations.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU need meet the following conditions:
Number of pilots on same symbol is 1; And
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 2 or 4 on the frequency domain.
In addition, can go up pilot tone of layout by the RE (1,1) in PRU.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow add 1 (or subtracting 1) and symbol constant, 6 RE that obtain are as the RE corresponding to 6 pilot tone places of second data flow.6 pilot tones that also are about to second data flow be separately positioned on identical with 6 pilot tone places of first data flow RE symbol and 6 RE that subcarrier is adjacent on.
Fig. 5 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 6 pilot tone places is respectively RE (1,1) among the PRU, and RE (3,5), RE (7,4), RE (11,3), RE (15,2), RE (17,6).Need to prove, be a lot of according to the available pilot configuration of above-mentioned condition, and this that is not limited to that Fig. 5 (a) illustrates is a kind of.Correspondingly, shown in Fig. 5 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,1), RE (4,5), RE (8,4), RE (12,3), RE (16,2), RE (18,6).
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 7.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 4 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 4 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol among the embodiment 4 on the 7th symbol, perhaps with the 1st～6 symbol on any one symbol the frequency domain position of pilot tone all inequality.
An example of present embodiment is shown in Fig. 6 (a) and Fig. 6 (b), Fig. 6 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Fig. 5 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Fig. 5 (a) on the 1st symbol the frequency domain position of pilot tone identical.Fig. 6 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Fig. 5 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Fig. 5 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 5.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 4 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Fig. 7 (a) and Fig. 7 (b), Fig. 7 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with preceding 5 symbols of Fig. 5 (a) on 5 symbols, Fig. 7 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of pilot tone is identical with preceding 5 symbols of Fig. 5 (b) on 5 symbols.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations, first kind is the base station sends a data flow in a PRU situation, and second kind is the base station sends two data flow in a PRU situation.Each data flow corresponding pilot tone (being frequency pilot sign) number in a PRU is 6 under these two kinds of situations.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU satisfies condition as follows:
Only, on 5,6 symbols pilot tone is set, does not have pilot tone on the 3rd, 4 symbol the 1st, 2;
Number of pilots on prosign is 1 or 2, and the absolute value of the difference of the sub-carrier indices at two pilot tone places is more than or equal to 2 on the prosign; And
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 4 to the maximum on the frequency domain.
In addition, can be in PRU be positioned on the 1st symbol on the RE of the 1st subcarrier and arrange a pilot tone.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow add 1 (or subtracting 1) and symbol constant, 6 RE that obtain are as the RE corresponding to 6 pilot tone places of second data flow.6 pilot tones that also are about to second data flow be separately positioned on identical with 6 pilot tone places of first data flow RE symbol and 6 RE that subcarrier is adjacent on, second data flow does not have pilot tone to send on the 3rd, 4 symbol of PRU yet.
Fig. 8 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 6 pilot tone places is respectively RE (1,1) among the PRU, and RE (5,5), RE (7,2), RE (11,5), RE (13,2), RE (17,6).Correspondingly, shown in Fig. 8 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,1), RE (6,5), RE (8,2), RE (12,5), RE (14,2), RE (18,6).
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 7.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 7 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 7 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol among the embodiment 7 on the 7th symbol, perhaps with the 1st～6 symbol on any one symbol the frequency domain position of pilot tone all inequality.
An example of present embodiment is shown in Fig. 9 (a) and Fig. 9 (b), Fig. 9 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Fig. 8 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Fig. 8 (a) on the 1st symbol the frequency domain position of pilot tone identical.Fig. 9 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Fig. 8 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Fig. 8 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Embodiment 9
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 5.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 7 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Figure 10 (a) and Figure 10 (b), Figure 10 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with preceding 5 symbols of Fig. 8 (a) on 5 symbols, Figure 10 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of pilot tone is identical with preceding 5 symbols of Fig. 8 (b) on 5 symbols.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations, first kind is the base station sends a data flow in a PRU situation, and second kind is the base station sends two data flow in a PRU situation.Each data flow corresponding pilot tone (being frequency pilot sign) number in a PRU is 6 under these two kinds of situations.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU satisfies condition as follows:
Number of pilots on each symbol is 1; And
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 4 to the maximum on the frequency domain.
For example, 6 pilot tones can be distributed on 5 subcarriers, and the absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 3 on the frequency domain.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow add 1 (or subtracting 1) and symbol constant, 6 RE that obtain are as the RE corresponding to 6 pilot tone places of second data flow.6 pilot tones that also are about to second data flow be separately positioned on identical with 6 pilot tone places of first data flow RE symbol and 6 RE that subcarrier is adjacent on.
Figure 11 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 6 pilot tone places is respectively RE (1,5) among the PRU, and RE (5,3), RE (9,1), RE (9,6), RE (13,4), RE (17,2).Correspondingly, shown in Figure 11 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,5), RE (6,3), RE (10,1), RE (10,6), RE (14,4), RE (18,2).
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 7.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 10 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 10 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol among the embodiment 10 on the 7th symbol, perhaps with the 1st～6 symbol on any one symbol the frequency domain position of pilot tone all inequality.
An example of present embodiment is shown in Figure 12 (a) and Figure 12 (b), Figure 12 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 11 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Figure 11 (a) on the 1st symbol the frequency domain position of pilot tone identical.Figure 12 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 11 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (1) and Figure 11 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 5.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 10 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Figure 13 (a) and Figure 13 (b), Figure 13 (a) is at the first kind of situation that sends a data flow among the PRU, the position of each pilot tone is identical with preceding 5 symbols of Figure 11 (a) on 5 symbols, Figure 13 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of each pilot tone is identical with preceding 5 symbols of Figure 11 (b) on 5 symbols.
More than 12 embodiment be applied to above-mentioned first kind of scene, for the pilot tone setting among the PRU of Class1, all can increase a condition, promptly on 2 subcarriers of PRU sub-carriers index maximum 1 pilot tone is set, on 2 subcarriers of sub-carrier indices minimum 1 pilot tone is set also.
The following examples are that the number of pilots of each data flow correspondence is 12 situation among the PRU of Class1, one or combination in any during the position of the pilot tone of each data flow correspondence in PRU meets the following conditions: condition one, number on prosign is 3 to the maximum, the index of any two adjacent pilot tone place subcarrier in frequency domain differs 3 subcarriers at most on the frequency domain of each data flow correspondence; Condition two, the number of the pilot tone of each data flow correspondence on each symbol of described PRU is at least 1; Condition three, the pilot tone of each data flow correspondence is 2 at first symbol of described PRU and the number on last symbol, more than 3 or 3.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations, first kind is the base station sends a data flow in a PRU situation, and second kind is the base station sends two data flow in a PRU situation.Each data flow corresponding pilot tone (being frequency pilot sign) number in a PRU is 12 under these two kinds of situations.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU satisfies condition as follows:
Number of pilots on prosign is 1,2 or 3, and the absolute value of the difference of the sub-carrier indices at two adjacent pilot frequencies places on the prosign is more than or equal to 4;
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 2 on the frequency domain; And
The pilot tone number is 3 on first symbol and last symbol.
In addition, can be in PRU be positioned on the 1st symbol on the RE of the 1st subcarrier and arrange a pilot tone.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow add 1 (or subtracting 1) and symbol constant, 12 RE that obtain are as the RE corresponding to 12 pilot tone places of second data flow.12 pilot tones that also are about to second data flow be separately positioned on identical with 12 pilot tone places of first data flow RE symbol and 12 RE that subcarrier is adjacent on.
Figure 14 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 12 pilot tone places is respectively RE (1,1) among the PRU, and RE (1,6), RE (3,4), RE (5,2), RE (7,4), RE (9,1), RE (9,6), RE (11,3), RE (13,5), RE (15,3), RE (17,1), RE (17,6).Correspondingly, shown in Figure 14 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,1), RE (2,6), and RE (4,4), RE (6,2), RE (8,4), RE (10,1), RE (10,6), RE (12,3), RE (14,5), RE (16,3), RE (18,1), RE (18,6).
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 15.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 13 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 13 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol among the embodiment 13 on the 7th symbol.
An example of present embodiment is shown in Figure 15 (a) and Figure 15 (b), Figure 15 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 14 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (3) and Figure 14 (a) on the 1st symbol the frequency domain position of pilot tone identical.Figure 15 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 14 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (3) and Figure 14 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 9.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 13 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Figure 16 (a) and Figure 16 (b), Figure 16 (a) is at the first kind of situation that sends a data flow among the PRU, the position of each pilot tone is identical with preceding 5 symbols of Figure 14 (a) on 5 symbols, Figure 16 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of each pilot tone is identical with preceding 5 symbols of Figure 14 (b) on 5 symbols.
Embodiment 16
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations, first kind is the base station sends a data flow in a PRU situation, and second kind is the base station sends two data flow in a PRU situation.Each data flow corresponding pilot tone (being frequency pilot sign) number in a PRU is 12 under these two kinds of situations.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU satisfies condition as follows:
Number of pilots on prosign is 1,2 or 3, and on the prosign absolute value of the difference of the sub-carrier indices at two adjacent pilot frequencies places more than or equal to 4;
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 2 or 3 on the frequency domain;
The pilot tone number is 3 on first symbol and last symbol, and
Pilot frequency carrier wave index on preceding 3 symbols is an odd number, and the pilot frequency carrier wave index on back three symbols is an even number, and perhaps, the pilot frequency carrier wave index on preceding 3 symbols is an even number, and the pilot frequency carrier wave index on back three symbols is an odd number.
In addition, can be in PRU be positioned on the 1st symbol on the RE of the 1st subcarrier and arrange a pilot tone.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, at preceding 3 symbols, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow adds 1 and (adds 1 when index is for odd number under first kind of situation, as then subtracting 1 for even number) and symbol constant, 6 RE conducts that obtain are corresponding to the RE at 6 pilot tone places of second data flow, at back 3 symbols, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow subtracts 1 and (subtracts 1 when index is for even number under first kind of situation, as then adding 1 for odd number) and symbol constant, 6 RE that obtain are as the RE at 6 pilot tone places in addition corresponding to second data flow.12 pilot tones that also are about to second data flow be separately positioned on identical with 12 pilot tone places of first data flow RE symbol and 12 RE that subcarrier is adjacent on.
Figure 17 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 12 pilot tone places is respectively RE (1,1) among the PRU, and RE (2,6), RE (4,4), RE (5,2), RE (8,4), RE (9,1), RE (10,6), RE (11,3), RE (14,5), RE (15,3), RE (17,1), RE (18,6).Correspondingly, shown in Figure 17 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,1), RE (1,6), and RE (3,4), RE (6,2), RE (7,4), RE (10,1), RE (9,6), RE (12,3), RE (13,5), RE (16,3), RE (18,1), RE (17,6).
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 15.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 16 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 16 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol among the embodiment 16 on the 7th symbol.
An example of present embodiment is shown in Figure 18 (a) and Figure 18 (b), Figure 18 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 17 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (3) and Figure 17 (a) on the 1st symbol the frequency domain position of pilot tone identical.Figure 18 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 17 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (3) and Figure 17 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 9.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 16 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Figure 19 (a) and Figure 19 (b), Figure 19 (a) is at the first kind of situation that sends a data flow among the PRU, the position of each pilot tone is identical with preceding 5 symbols of Figure 17 (a) on 5 symbols, Figure 19 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of each pilot tone is identical with preceding 5 symbols of Figure 17 (b) on 5 symbols.
Embodiment 19
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations, first kind is the base station sends a data flow in a PRU situation, and second kind is the base station sends two data flow in a PRU situation.Each data flow corresponding pilot tone (being frequency pilot sign) number in a PRU is 12 under these two kinds of situations.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU satisfies condition as follows:
Number of pilots on prosign is 2, and the absolute value of the difference of the sub-carrier indices at two pilot tone places is more than or equal to 4; And
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 2 on the frequency domain.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, at each symbol, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow add 1 (or subtracting 1) and symbol constant, 12 RE that obtain are as the RE corresponding to 12 pilot tone places of second data flow.12 pilot tones that also are about to second data flow be separately positioned on identical with 12 pilot tone places of first data flow RE symbol and 12 RE that subcarrier is adjacent on.
Figure 20 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 12 pilot tone places is respectively RE (1,2) among the PRU, and RE (1,6), RE (3,4), RE (5,2), RE (7,4), RE (9,1), RE (9,6), RE (11,3), RE (13,5), RE (15,3), RE (17,1), RE (17,5).Accordingly, shown in Figure 20 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,2), RE (2,6), and RE (4,4), RE (6,2), RE (8,4), RE (10,1), RE (10,6), RE (12,3), RE (14,5), RE (16,3), RE (18,1), RE (18,5).
Embodiment 20
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 14.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 19 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 19 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol among the embodiment 19 on the 7th symbol.
An example of present embodiment is shown in Figure 21 (a) and Figure 21 (b), Figure 21 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 20 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (2) and Figure 20 (a) on the 1st symbol the frequency domain position of pilot tone identical.Figure 21 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 20 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (2) and Figure 20 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 10.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 19 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Figure 22 (a) and Figure 22 (b), Figure 22 (a) is at the first kind of situation that sends a data flow among the PRU, the position of each pilot tone is identical with preceding 5 symbols of Figure 20 (a) on 5 symbols, Figure 22 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of each pilot tone is identical with preceding 5 symbols of Figure 20 (b) on 5 symbols.
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 6 structures (being Class1).Be divided into two kinds of situations, first kind is the base station sends a data flow in a PRU situation, and second kind is the base station sends two data flow in a PRU situation.Each data flow corresponding pilot tone (being frequency pilot sign) number in a PRU is 12 under these two kinds of situations.
At the first kind of situation that sends a data flow in a PRU, the position of the pilot tone that present embodiment is provided with in a PRU satisfies condition as follows:
Number of pilots on prosign is 2, and the absolute value of the difference of the sub-carrier indices at two pilot tone places is more than or equal to 4;
The absolute value of the difference of the sub-carrier indices at adjacent pilot tone place is 1,2 or 3 on the frequency domain; And
The sub-carrier indices at the pilot tone place on first three symbol is an odd number, the sub-carrier indices at the pilot tone place on three symbols in back is an even number, perhaps, the sub-carrier indices at the pilot tone place on first three symbol is an even number, and the sub-carrier indices at the pilot tone place on back three symbols is an odd number.
In a PRU, send second kind of situation of two data flow, each pilot frequency locations of first data flow is identical with first kind of situation, at preceding 3 symbols, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow adds 1 and (adds 1 when index is for odd number under first kind of situation, subtract 1 during for even number) and symbol constant, 6 RE conducts that obtain are corresponding to the RE at 6 pilot tone places of second data flow, at back 3 symbols, the sub-carrier indices of each pilot tone place RE that will be corresponding with first data flow subtracts 1 and (subtracts 1 when index is for even number under first kind of situation, add 1 during for odd number) and symbol constant, 6 RE that obtain are as the RE at 6 pilot tone places in addition corresponding to second data flow.12 pilot tones that also are about to second data flow be separately positioned on identical with 12 pilot tone places of first data flow RE symbol and 12 RE that subcarrier is adjacent on.
Figure 23 (a) is the example of a kind of pilot configuration of obtaining by above condition setting, and according to the index of subcarrier that provides among Fig. 1 and symbol, the RE at 12 pilot tone places is respectively RE (1,2) among the PRU, and RE (2,6), RE (4,4), RE (5,2), RE (8,4), RE (9,1), RE (10,6), RE (11,3), RE (14,5), RE (15,3), RE (17,1), RE (18,5).Accordingly, shown in Figure 23 (b), the RE at the pilot tone place of second data flow correspondence is respectively RE (2,2), RE (1,6), and RE (3,4), RE (6,2), RE (7,4), RE (10,1), RE (9,6), RE (12,3), RE (13,5), RE (16,3), RE (18,1), RE (17,5).
Embodiment 23
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 7 structures (being type 2).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 14.
On preceding 6 symbols of present embodiment among the position of pilot tone and the embodiment 22 on 6 symbols the position of pilot tone identical, on the 7th symbol among the frequency domain position of pilot tone and the embodiment 22 on the 1st symbol the frequency domain position of pilot tone identical.But in the change example of present embodiment, the frequency domain position of pilot tone also can be identical with the frequency domain position of pilot tone on any one symbol in the 2nd～6 symbol among the embodiment 22 on the 7th symbol.
An example of present embodiment is shown in Figure 24 (a) and Figure 24 (b), Figure 24 (a) is at the first kind of situation that sends a data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 23 (a) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (2) and Figure 23 (a) on the 1st symbol the frequency domain position of pilot tone identical.Figure 24 (b) is at the second kind of situation that sends two data flow among the PRU, the position of pilot tone is identical with 6 symbols among Figure 23 (b) on preceding 6 symbols, on the 7th symbol among the frequency domain position of pilot tone (2) and Figure 23 (b) on the 1st symbol the frequency domain position of pilot tone identical.
Embodiment 24
Present embodiment has provided the position of the pilot tone that is provided with in the PRU of 18 * 5 structures (being type 3).Be divided into two kinds of situations that send a data flow and two data flow in a PRU equally, in a PRU, the pilot tone number average of each data flow correspondence is 10.
On 5 symbols of present embodiment among the position of pilot tone and the embodiment 22 on any 5 symbols the position of pilot tone identical.An example of present embodiment is shown in Figure 25 (a) and Figure 25 (b), Figure 25 (a) is at the first kind of situation that sends a data flow among the PRU, the position of each pilot tone is identical with preceding 5 symbols of Figure 23 (a) on 5 symbols, Figure 25 (b) is at the second kind of situation that sends two data flow among the PRU, and the position of each pilot tone is identical with preceding 5 symbols of Figure 23 (b) on 5 symbols.
Above embodiment 13 to 24 is applied to above-mentioned first kind of scene, for the pilot tone setting among the PRU of Class1 wherein, also can increase a condition, promptly on 2 subcarriers of PRU sub-carriers index maximum 2 pilot tones are set, on 2 subcarriers of sub-carrier indices maximum 2 pilot tones are set also.
Claims (10)
1. the pilot sending method of a Multimedia Broadcast Multicast Service is applied to adopt the wireless communication system of OFDM (OFDM) technology, comprising:
Base station or wireless relay stand in the zone that descending sub frame is used for sending multicast broadcast service data and send pilot tone to terminal, in the physical resource unit of each Class1 in this zone (PRU), for the corresponding number of pilots that sends of each data flow is 6 or 12.
2. pilot sending method as claimed in claim 1 is characterized in that:
The number of pilots of each data flow correspondence is 6 o'clock among the PRU of described Class1, and the position of the pilot tone of each data flow correspondence in PRU one of meets the following conditions or combination in any:
Condition one, the number on the prosign is 2 to the maximum, and the index of any two adjacent pilot tone place subcarrier in frequency domain differs 4 subcarriers at most on the frequency domain of each data flow correspondence;
Condition two, the pilot tone of each data flow correspondence is distributed on the 1st, 2,5,6 symbols among the described PRU, perhaps is distributed on each symbol among the described PRU.
3. pilot sending method as claimed in claim 1 is characterized in that:
The number of pilots of each data flow correspondence is 6 o'clock among the PRU of described Class1, and the Resource Unit at 6 pilot tone places of one of them data flow is RE (1,1), RE (3,5), RE (7,2), RE (11,5), RE (15,2), RE (17,6); Perhaps, RE (1,1), RE (3,5), RE (7,4), RE (11,3), RE (15,2), RE (17,6); Perhaps, RE (1,1), RE (5,5), RE (7,2), RE (11,5), RE (13,2), RE (17,6); Perhaps, RE (1,5), RE (5,3), RE (9,1), RE (9,6), RE (13,4), RE (17,2), wherein, RE (x, y) being expressed as sub-carrier indices is x, and notation index is the Resource Unit of y, and sub-carrier indices is that the index with the Resource Unit place subcarrier on angle among the PRU is made as 1, the index of adjacent sub-carrier adds one successively and obtains, notation index is that the index with this Resource Unit place symbol is made as 1, and the index of adjacent-symbol adds one successively and obtains.
4. pilot sending method as claimed in claim 1 is characterized in that:
The number of pilots of each data flow correspondence is 12 o'clock among the PRU of described Class1, one or combination in any during the position of the pilot tone of each data flow correspondence in PRU meets the following conditions:
Condition one, the number on prosign is 3 to the maximum, and the index of any two adjacent pilot tone place subcarrier in frequency domain differs 3 subcarriers at most on the frequency domain of each data flow correspondence;
Condition two, the number of the pilot tone of each data flow correspondence on each symbol of described PRU is at least 1;
Condition three, the pilot tone of each data flow correspondence is 2 at first symbol of described PRU and the number on last symbol, more than 3 or 3.
5. pilot sending method as claimed in claim 1 is characterized in that:
The number of pilots of each data flow correspondence is 12 o'clock among the PRU of described Class1, and the Resource Unit at 12 pilot tone places of one of them data flow correspondence is respectively:
RE (1,1), RE (1,6), RE (3,4), RE (5,2), RE (7,4), RE (9,1), RE (9,6), RE (11,3), RE (13,5), RE (15,3), RE (17,1), RE (17,6); Perhaps
RE (1,1), RE (2,6), RE (4,4), RE (5,2), RE (8,4), RE (9,1), RE (10,6), RE (11,3), RE (14,5), RE (15,3), RE (17,1), RE (18,6); Perhaps
RE (1,2), RE (1,6), RE (3,4), RE (5,2), RE (7,4), RE (9,1), RE (9,6), RE (11,3), RE (13,5), RE (15,3), RE (17,1), RE (17,5); Perhaps
RE(1，2)，RE(2，6)，RE(4，4)，RE(5，2)，RE(8，4)，RE(9，1)，RE(10，6)，RE(11，3)，RE(14，5)，RE(15，3)，RE(17，1)，RE(18，5)；
Wherein, RE (x, y) being expressed as sub-carrier indices is x, notation index is the Resource Unit of y, sub-carrier indices is that the index with the Resource Unit place subcarrier on angle among the PRU is made as 1, the index of adjacent sub-carrier adds one successively and obtains, notation index is that the index with this Resource Unit place symbol is made as 1, and the index of adjacent-symbol adds one successively and obtains.
6. as the described pilot sending method of arbitrary claim in the claim 1, it is characterized in that:
Base station or wireless relay stand in when sending pilot tone among the PRU of descending subframe for each type 2 of zone of transmission multicast broadcast service data; The number of pilots and the position that send on 6 symbols of the number of the pilot tone that sends on front 6 symbols of the PRU of described type 2 and position and the PRU of Class1 are identical; Among the number of the pilot tone that sends on the 7th symbol of the PRU of described type 2 and the PRU of frequency domain position and Class1 the 1st; 2; 3; 4; The number of the pilot tone that sends on 5 or 6 symbols is identical with the frequency domain position
7. as the described pilot sending method of arbitrary claim in the claim 1, it is characterized in that:
Base station or wireless relay stand in when sending pilot tone among the PRU of each type 3 in zone that descending sub frame is used for sending multicast broadcast service data, and the number and the position of the pilot tone that sends on the zone that preceding 5 symbols in 6 symbols of the number of the pilot tone that sends on 5 symbols of the PRU of described type 3 and position and the PRU of Class1 are formed or the zone of other any 5 symbols compositions are identical.
8. as claim 1 or 6 or 7 described pilot sending methods, it is characterized in that:
Base station or wireless relay stand among each PRU when sending two data flow, and the pilot tone of second the data flow correspondence pilot tone corresponding with first data flow is corresponding one by one, and two pilot tones of correspondence are positioned on the adjacent sub-carrier of prosign.
9. pilot sending method as claimed in claim 1 is characterized in that:
Before base station or wireless relay stand in and send pilot tone, select the number of pilots and the pilot frequency format of described each stream of employing earlier according to the spacing of base station or radio repeater station, and the notice terminal.
10. pilot sending method as claimed in claim 9 is characterized in that:
When the spacing between described base station and/or the radio repeater station was N1, the number of pilots of each data flow correspondence was 6 among the described PRU, wherein 0＜N1＜5000m;
When the spacing between described base station and/or the radio repeater station was N2, the number of pilots of each data flow correspondence was 12 among the described PRU, 0＜N2＜100000 meter wherein, N1＜N2.
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| CN105706509A (en) * | 2013-11-05 | 2016-06-22 | 高通股份有限公司 | Diversity enhancement in a multiple carrier system |
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