CN101764776A - Transmission method of special pilot frequency for user - Google Patents
Transmission method of special pilot frequency for user Download PDFInfo
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- CN101764776A CN101764776A CN200810240730A CN200810240730A CN101764776A CN 101764776 A CN101764776 A CN 101764776A CN 200810240730 A CN200810240730 A CN 200810240730A CN 200810240730 A CN200810240730 A CN 200810240730A CN 101764776 A CN101764776 A CN 101764776A
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Abstract
The invention relates to a transmission method of special pilot frequency for a user, comprising the following steps: setting a first user dedicated pilot frequency port PORT5 and a second user dedicated pilot frequency port PORT6, and respectively transmitting user dedicated pilot frequency of two data flows by using the two set pilot frequency ports, i.e., PORT 5 and PORT6. By applying the transmission method, the dedicated pilot frequency transmission of the two data flows can be supported.
Description
Technical field
The present invention relates to the pilot transmission in the LTE system, particularly a kind of transmission method of supporting the special pilot frequency for user of dual data stream.
Background technology
In current Long Term Evolution (LTE) system, antenna port Port0-Port5 defines, wherein port0～Port3 is the port of public guide frequency, be used for by these port transmission public guide frequency data, port4 is the pilot tone port of MBMS, be used for pilot data, and port5 is the pilot tone port for user's special use, is generally used for carrying out Beamforming by this port by this port transmission MBMS.It is the pilot tone port of user's special use that present standard Release 8 has only port5, can be used to support Beamforming, and only support a data flow, if Release in the future 9 supports two data flow, then can't utilize existing mode to carry out the dedicated pilot transmission of two data flow, also can't support the Beamforming of two data flow.
Summary of the invention
In view of this, the invention provides a kind of transmission method of special pilot frequency for user, can support the dedicated pilot transmission of dual data stream.
For achieving the above object, the present invention adopts following technical scheme:
A kind of transmission method of special pilot frequency for user is provided with the first special pilot frequency for user port PO RT5 in advance in each Resource Block, this method further comprises:
The second special pilot frequency for user port PO RT6 is set in each Resource Block in advance, and two special pilot frequency for user port PO RT5 that utilize to be provided with and PORT6 transmit the special pilot frequency for user of two data flow respectively.
Preferably, when adopting normal CP, the second special pilot frequency for user port PO RT6 is set in arbitrary Resource Block in advance comprises:
12 second special pilot frequency for user port PO RT6 are set in described arbitrary Resource Block, and these 12 PORT6 are divided into 4 groups,
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that the PORT6 of 4 groups takies is respectively the 4th, 7,10,13 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first PORT6 of another group, 1 subcarrier bandwidth in interval on frequency.
Preferably, when adopting normal CP, the second special pilot frequency for user port PO RT6 is set in arbitrary Resource Block in advance comprises:
9 essential PORT6 and 3 optional PORT6 are set in described arbitrary Resource Block, and wherein 9 essential PORT6 are divided into 3 groups, and 3 optional PORT6 are as 1 group;
9 essential PORT6 are effective all the time, and when the OFDM number that is used for control channel of PCFICH indication was less than 3, optional 3 PORT6 were effective, and take the position of the 3rd OFDM symbol; When the OFDM number that is used for control channel of PCFICH indication equaled 3, optional 3 PORT6 were invalid;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that 3 group PORT6 of essential PORT6 take is respectively the 6th, 11,14 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency;
The described PORT6 of utilization transmission user dedicated pilot is: utilize effective PORT6 transmission user dedicated pilot.
Preferably, when adopting normal CP, the second special pilot frequency for user port PO RT6 is set in arbitrary Resource Block in advance comprises:
9 PORT6 are set in described arbitrary Resource Block, and these 9 PORT6 are divided into 3 groups;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
3 time resources of taking of group PORT6 are respectively the 6th, 11,14 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
Preferably, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
8 second special pilot frequency for user port PO RT6 are set in described arbitrary Resource Block, and these 8 PORT6 are divided into 2 groups,
4 PORT6 of every group take identical time resource, and adjacent two PORT6 are 2 subcarrier bandwidth in interval on frequency;
The time resource that 2 groups of PORT6 take is respectively the 5th, 11 OFDM symbol;
In 2 groups of PORT6, first PORT6 of one group and first PORT6 of another group are in adjacent subcarrier bandwidth on frequency.
Preferably, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
12 second special pilot frequency for user port PO RT6 are set in described arbitrary Resource Block, and these 12 PORT6 are divided into 3 groups,
4 PORT6 of every group take identical time resource, and adjacent two PORT6 are 2 subcarrier bandwidth in interval on frequency;
The time resource that 3 groups of PORT6 take is respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first PORT6 of another group are in adjacent subcarrier bandwidth on frequency, and first group of PORT6 takies identical frequency resource with the 3rd group of PORT6.
Preferably, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
9 essential PORT6 and 3 optional PORT6 are set in described arbitrary Resource Block, and wherein 9 essential PORT6 are divided into 3 groups, and 3 optional PORT6 are as 1 group;
9 essential PORT6 are effective all the time, and when the OFDM number that is used for control channel of PCFICH indication was less than 3, optional 3 PORT6 were effective, and take the position of the 3rd OFDM symbol; When the OFDM number that is used for control channel of PCFICH indication equaled 3, optional 3 PORT6 were invalid;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that 3 group PORT6 of essential PORT6 take is respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency;
The described PORT6 of utilization transmission user dedicated pilot is: utilize effective PORT6 transmission user dedicated pilot.
Preferably, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
9 PORT6 are set in described arbitrary Resource Block, and these 9 PORT6 are divided into 3 groups;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
3 time resources of taking of group PORT6 are respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
Preferably, two of described utilization setting special pilot frequency for user port PO RT5 and PORT6 transmit the special pilot frequency for user of two data flow respectively and be: the wave beam that utilizes two special pilot frequency for user port PO RT5 being provided with and PORT6 to carry out two data flow respectively forms.
As seen from the above technical solution, among the present invention, carry out the pilot tone port when being provided with, except that PORT5 is set, another special pilot frequency for user port PO RT6 further is set, thereby when carrying out the special pilot frequency for user transmission, can utilize two special pilot frequency for user port PO RT5 and PORT6 to carry out the dedicated pilot transmission of two data flow respectively.As seen, use the present invention, can support the dedicated pilot transmission of dual data stream.
Description of drawings
Fig. 1 is a kind of set-up mode schematic diagram of PORT6 in the embodiment of the invention one.
Fig. 2 is a kind of set-up mode schematic diagram of PORT6 in the embodiment of the invention two.
Fig. 3 is a kind of set-up mode schematic diagram of PORT6 in the embodiment of the invention three.
Fig. 4 is a kind of set-up mode schematic diagram of PORT6 in the embodiment of the invention four.
Fig. 5 is a kind of set-up mode schematic diagram of PORT6 in the embodiment of the invention five.
Fig. 6 is a kind of set-up mode schematic diagram of PORT6 in the embodiment of the invention six.
Fig. 7 is a kind of set-up mode schematic diagram of PORT6 in the embodiment of the invention seven.
Embodiment
For making purpose of the present invention, technological means and advantage clearer, the present invention is described in further details below in conjunction with accompanying drawing.
Basic thought of the present invention is: special pilot frequency for user port PO RT6 further is set in each Resource Block, thereby utilizes PORT5 and PORT6 to carry out the dedicated pilot transmission of two data flow respectively.
Specifically in each Resource Block, carry out PORT6 when being provided with, thus to consider on the one hand and other pilot tones between the relation interference problem that may cause, thereby to consider the demodulation performance problem that number causes that is provided with of PORT6 in the Resource Block on the other hand.
The consideration of comprehensive above-mentioned two aspects provides several different PORT6 set-up modes among the present invention.Below just be elaborated by specific embodiment.
In ofdm system, CP length has two kinds, and according to the difference of CP, resource block size and pilot tone setting are also different.Describe to the PORT6 set-up mode under the short CP and based on the special pilot frequency for user transmission means that this PORT6 and PORT5 realized among the embodiment one～three below, in embodiment four～seven, describe to the PORT6 set-up mode under the long CP and based on the special pilot frequency for user transmission means that this PORT6 and PORT5 realized.
Embodiment one:
At first, according to existing mode PORT0～PORT5 is set in each Resource Block, and in each Resource Block PORT6 is set further, the set-up mode of concrete PORT6 is:
12 second special pilot frequency for user port PO RT6 are set in a Resource Block, and these 12 PORT6 are divided into 4 groups,
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that the PORT6 of 4 groups takies is respectively the 4th, 7,10,13 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first PORT6 of another group, 1 subcarrier bandwidth in interval on frequency.
The PORT6 that carries out by the way is provided with, and make the relative position of all PORT6 in this Resource Block and the time resource that takies fix, but the frequency resource that takies can change.Particularly, can on frequency direction, carry out whole displacement according to all PORT6 of above-mentioned setting, thereby change concrete frequency location, but shared time resource and the relative position between each PORT6 are constant.For example, wherein the result that is provided with of a kind of PORT6 can be as shown in Figure 1.
As seen from Figure 1, have four row PORT6, every row PORT6 is one group, and the PORT6 of same row obviously takies identical time resource, and adjacent PORT6 2 subcarrier bandwidth at interval in the same row.The PORT6 of every row takies identical time resource with PORT5.In Fig. 1, the concrete frequency location of PORT6 is adjacent with PORT5.In fact, also all 12 PORT6 among Fig. 1 can be carried out integral translation on frequency direction, for example with the PORT5 subcarrier bandwidth of being separated by.
In addition, above-mentioned is the set-up mode of example explanation PORT6 with a Resource Block only, in fact, need all carry out the setting of PORT6 by each Resource Block in the whole frequency band scope.
Next, after carrying out being provided with of PORT6, in Resource Block, there are two kinds of special pilot frequency for user port PO RT5 and PORT6,, can utilize PORT5 and PORT6 to carry out the dedicated pilot transmission of two data flow respectively for the user of dual data stream.Usually, can utilize PORT5 and PORT6 to be respectively two data streams and carry out wave beam formation; Certainly, also can carry out the transmission of other special pilot frequency for user.
In the PORT6 setting and dedicated pilot transmission mode that present embodiment carries out, because pilot distribution is more even, density is big, so the demodulation performance of data is than higher; And in each Resource Block, Port5 is identical with the Port6 number, and therefore the performance of two data flow is also suitable; In addition, though the number of PORT6 is bigger in the present embodiment, compare down the increase of data volume, the Overhead that PORT6 brought increases or acceptable.
But in the scheme of present embodiment, on the one hand, the more Overhead that makes is bigger owing to the PORT6 number; On the other hand, the edge two sub-districts if there are two users closer from getting, and supports that all two users' port5 and port6 possibility of collision are bigger under the situation of double fluid.For example, adopt mode shown in Figure 1 to carry out the setting of PORT6, the sub-district ID of User0 service is 1, and the Serving cell ID of User 1 is 3, suppose that the pilot tone of the port5 of NodeB all inserts on the frequency location of sub-district ID Mod 3, then the Port6 of the port5 of User 0 and User1 will mutual superposition, forms to disturb.
Embodiment two:
First three OFDM symbol of a Resource Block can be used as control channel, but in actual applications, can select first or preceding two or first three OFDM symbol as control channel, and the OFDM number of concrete selection is indicated by the PCFICH channel.In the present embodiment, except that fixedly installing part PORT6, the 3rd OFDM symbol that can also be in Resource Block is provided with PORT6 during as control channel on this position, when the 3rd OFDM symbol in Resource Block is not used as control channel, PORT6 is not set on this position.That is to say have the setting of part PORT6 to change.The PORT6 that fixedly installs is called essential PORT6, the PORT6 on the 3rd the OFDM character position is called optional PORT6.
Particularly, at first, according to existing mode PORT0～PORT5 is set in each Resource Block, and in each Resource Block PORT6 is set further, the set-up mode of concrete PORT6 is:
9 essential PORT6 and 3 optional PORT6 are set in a Resource Block, and wherein 9 essential PORT6 are divided into 3 groups, and 3 optional PORT6 are as 1 group;
9 essential PORT6 are effective all the time, and when the OFDM number that is used for control channel of PCFICH indication was less than 3, optional 3 PORT6 were effective, and take the position of the 3rd OFDM symbol; When the OFDM number that is used for control channel of PCFICH indication equaled 3, optional 3 PORT6 were invalid;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that 3 group PORT6 of essential PORT6 take is respectively the 6th, 11,14 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
The PORT6 that carries out by the way is provided with, make the relative position of all PORT6 in this Resource Block and the time resource that takies fix, but it is similar with the situation among the embodiment one, the frequency resource that these PORT6 take can change, promptly all PORT6 can be carried out whole displacement on frequency direction, thereby change concrete frequency location.For example, wherein the result that is provided with of a kind of PORT6 can be as shown in Figure 2.
As seen from Figure 2, have four row PORT6, every row PORT6 is one group, and the PORT6 of same row obviously takies identical time resource, and adjacent PORT6 2 subcarrier bandwidth at interval in the same row.3 PORT6 on the 3rd OFDM character position are that condition exists, as previously mentioned.All the other time resources that are listed as that respectively PORT6 takies respectively are the 6th, 11,14 OFDM symbol.In Fig. 2, the concrete frequency location of PORT6 is identical with PORT5.In fact, also all 12 PORT6 among Fig. 2 can be carried out integral translation on frequency direction, for example adjacent with PORT5.
In addition, above-mentioned is the set-up mode of example explanation PORT6 with a Resource Block only, in fact, need all carry out the setting of PORT6 by each Resource Block in the whole frequency band scope.
Next, after carrying out being provided with of PORT6, in Resource Block, have two kinds of special pilot frequency for user port PO RT5 and PORT6, for the user of dual data stream, can utilize PORT5 and effectively PORT6 carry out the dedicated pilot transmission of two data flow respectively.Usually, can utilize PORT5 and effective PORT6 to be respectively two data streams and carry out wave beam formation; Certainly, also can carry out the transmission of other special pilot frequency for user.
In the PORT6 setting and dedicated pilot transmission mode that present embodiment carries out, there are 9 PORT6 to fix, have 3 PORT6 to determine whether these 3 PORT6 exist in addition according to the OFDM number that is used as control channel in the system.The configuration mode of this PORT6, make that the Overhead that is brought by PORT6 is less with respect to the mode among the embodiment one, and because PORT5 can not take identical time resource with PORT6, therefore the problem that does not have adjacent sub-district Port5 and Port6 collision, and other pilot tone do not had any influence.
But the PORT6 that adopts aforesaid way to be configured is 3 o'clock at the OFDM number as control channel, and the number of its PORT6 is less, so the Overhead of pilot tone is less, and the demodulation performance of system descends to some extent than embodiment one; In addition, because the pilot density of Port5 and Port6 is different, their demodulation performance also has certain difference.
Embodiment three:
Particularly, at first, according to existing mode PORT0～PORT5 is set in each Resource Block, and in each Resource Block PORT6 is set further, the set-up mode of concrete PORT6 is:
9 PORT6 are set in a Resource Block, and these 9 PORT6 are divided into 3 groups;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
3 time resources of taking of group PORT6 are respectively the 6th, 11,14 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
Among PORT6 set-up mode in the present embodiment and the embodiment two essential PORT6 be provided with identically, promptly on the set-up mode basis of embodiment two, on the 3rd OFDM character position, PORT6 is set no longer.
Similar with preceding two embodiment, the PORT6 that carries out by the way is provided with, make the relative position of all PORT6 in this Resource Block and the time resource that takies fix, but the frequency resource that takies can change, promptly all PORT6 can be carried out whole displacement on frequency direction, thereby change concrete frequency location.For example, wherein the result that is provided with of a kind of PORT6 can be as shown in Figure 3.
In Fig. 3, the concrete frequency location of PORT6 is identical with PORT5.In fact, also all 12 PORT6 among Fig. 3 can be carried out integral translation on frequency direction, for example adjacent with PORT5.
In addition, by the contrast of Fig. 3 and Fig. 2 as seen, the difference that the two PORT6 is provided with only is not have PORT6 among Fig. 3 on the 3rd OFDM character position.
Above-mentioned is the set-up mode of example explanation PORT6 with a Resource Block only, in fact, need all carry out the setting of PORT6 by each Resource Block in the whole frequency band scope.
Next, after carrying out being provided with of PORT6, in Resource Block, have two kinds of special pilot frequency for user port PO RT5 and PORT6, for the user of dual data stream, can utilize PORT5 and effectively PORT6 carry out the dedicated pilot transmission of two data flow respectively.Usually, can utilize PORT5 and effective PORT6 to be respectively two data streams and carry out wave beam formation; Certainly, also can carry out the transmission of other special pilot frequency for user.
In the PORT6 setting and dedicated pilot transmission mode that present embodiment carries out, the Overhead that is brought by the setting of PORT6 is less with respect to embodiment one and embodiment two, and the problem that does not have adjacent sub-district Port5 and Port6 collision, do not have and the interactional problem of control channel data yet, what influence is other pilot tone do not had yet.
But because the Overhead of pilot tone is less, the demodulation performance of system descends to some extent than embodiment one, and in addition, the pilot density of Port5 and Port6 is different, and their demodulation performance also has certain difference.But the data flow of port6 can adopt and reduce encoding rate and adopt than low modulation mode compensating loss of energy.
Embodiment four:
Particularly, at first, according to existing mode PORT0～PORT5 is set in each Resource Block, and in each Resource Block PORT6 is set further, the set-up mode of concrete PORT6 is:
8 second special pilot frequency for user port PO RT6 are set in a Resource Block, and these 8 PORT6 are divided into 2 groups,
4 PORT6 of every group take identical time resource, and adjacent two PORT6 are 2 subcarrier bandwidth in interval on frequency;
The time resource that 2 groups of PORT6 take is respectively the 5th, 11 OFDM symbol;
In 2 groups of PORT6, first PORT6 of one group and first PORT6 of another group are in adjacent subcarrier bandwidth on frequency.
Similar with preceding several embodiment, the PORT6 that carries out by the way is provided with, make the relative position of all PORT6 in this Resource Block and the time resource that takies fix, but the frequency resource that takies can change, promptly all PORT6 can be carried out whole displacement on frequency direction, thereby change concrete frequency location.For example, wherein the result that is provided with of a kind of PORT6 can be as shown in Figure 4.
In Fig. 4, the concrete frequency location of PORT6 is adjacent with PORT5.In fact, also all 12 PORT6 among Fig. 4 can be carried out integral translation on frequency direction, for example with PORT5 1 subcarrier bandwidth of being separated by.
In addition, above-mentioned is the set-up mode of example explanation PORT6 with a Resource Block only, in fact, need all carry out the setting of PORT6 by each Resource Block in the whole frequency band scope.
Next, after carrying out being provided with of PORT6, in Resource Block, have two kinds of special pilot frequency for user port PO RT5 and PORT6, for the user of dual data stream, can utilize PORT5 and effectively PORT6 carry out the dedicated pilot transmission of two data flow respectively.Usually, can utilize PORT5 and effective PORT6 to be respectively two data streams and carry out wave beam formation; Certainly, also can carry out the transmission of other special pilot frequency for user.
In the PORT6 setting and dedicated pilot transmission mode that present embodiment carries out, the Overhead that is brought by the setting of PORT6 is less.But, because PORT6 is comparatively sparse with respect to the port5 pilot distribution, so the demodulation performance of two data flow meeting difference; And,, under the terminal high-speed motion, demodulation performance is reduced because two PORT6 are bigger at interval on time-domain; In addition and the embodiment one similar ground of short CP, the edge two sub-districts, if having two users from closer, and support all under the situation of dual data stream that two users' port5 and port6 possibility of collision are bigger.
Embodiment five:
Particularly, at first, according to existing mode PORT0～PORT5 is set in each Resource Block, and in each Resource Block PORT6 is set further, the set-up mode of concrete PORT6 is:
12 second special pilot frequency for user port PO RT6 are set in a Resource Block, and these 12 PORT6 are divided into 3 groups,
4 PORT6 of every group take identical time resource, and adjacent two PORT6 are 2 subcarrier bandwidth in interval on frequency;
The time resource that 3 groups of PORT6 take is respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first PORT6 of another group are in adjacent subcarrier bandwidth on frequency, and first group of PORT6 takies identical frequency resource with the 3rd group of PORT6.
Similar with preceding several embodiment, the PORT6 that carries out by the way is provided with, make the relative position of all PORT6 in this Resource Block and the time resource that takies fix, but the frequency resource that takies can change, promptly all PORT6 can be carried out whole displacement on frequency direction, thereby change concrete frequency location.For example, wherein the result that is provided with of a kind of PORT6 can be as shown in Figure 5.
In Fig. 5, the concrete frequency location of PORT6 is adjacent with PORT5.In fact, also can be with all 12 PORT6 integral translation arbitrary unit on frequency direction among Fig. 5, for example adjacent or plurality of sub carrier bandwidths of being separated by with PORT5.
In addition, above-mentioned is the set-up mode of example explanation PORT6 with a Resource Block only, in fact, need all carry out the setting of PORT6 by each Resource Block in the whole frequency band scope.
Next, after carrying out being provided with of PORT6, in Resource Block, have two kinds of special pilot frequency for user port PO RT5 and PORT6, for the user of dual data stream, can utilize PORT5 and effectively PORT6 carry out the dedicated pilot transmission of two data flow respectively.Usually, can utilize PORT5 and effective PORT6 to be respectively two data streams and carry out wave beam formation; Certainly, also can carry out the transmission of other special pilot frequency for user.
In the PORT6 setting and dedicated pilot transmission mode that present embodiment carries out, pilot distribution is more even, and density is big, and the demodulation performance of data should be than higher; And the performance of the data flow of Port5 and Port6 is suitable; Though the Overhead that brings owing to PORT6 is bigger, than the increase of data volume, Overhead or acceptable; And other pilot tone phase mutual interference of getting along well.
Embodiment six:
Particularly, at first, in each Resource Block, PORT0～PORT5 is set according to existing mode, and PORT6 is set further in each Resource Block, the set-up mode of PORT6 and embodiment two are similar, all have essential PORT6 and are positioned at the 3rd the optional PORT6 on the OFDM symbol, are specially:
9 essential PORT6 and 3 optional PORT6 are set in a Resource Block, and wherein 9 essential PORT6 are divided into 3 groups, and 3 optional PORT6 are as 1 group;
9 essential PORT6 are effective all the time, and when the OFDM number that is used for control channel of PCFICH indication was less than 3, optional 3 PORT6 were effective, and take the position of the 3rd OFDM symbol; When the OFDM number that is used for control channel of PCFICH indication equaled 3, optional 3 PORT6 were invalid;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that 3 group PORT6 of essential PORT6 take is respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
Similar with preceding several embodiment, the PORT6 that carries out by the way is provided with, make the relative position of all PORT6 in this Resource Block and the time resource that takies fix, but the frequency resource that takies can change, promptly all PORT6 can be carried out whole displacement on frequency direction, thereby change concrete frequency location.For example, wherein the result that is provided with of a kind of PORT6 can be as shown in Figure 6.
In Fig. 6, the concrete frequency location of PORT6 is as figure.In fact, also can be with all 12 the some unit of PORT6 integral translation on frequency direction among Fig. 6.
In addition, above-mentioned is the set-up mode of example explanation PORT6 with a Resource Block only, in fact, need all carry out the setting of PORT6 by each Resource Block in the whole frequency band scope.
Next, after carrying out being provided with of PORT6, in Resource Block, have two kinds of special pilot frequency for user port PO RT5 and PORT6, for the user of dual data stream, can utilize PORT5 and effectively PORT6 carry out the dedicated pilot transmission of two data flow respectively.Usually, can utilize PORT5 and effective PORT6 to be respectively two data streams and carry out wave beam formation; Certainly, also can carry out the transmission of other special pilot frequency for user.
The PORT6 that present embodiment carries out is provided with and the dedicated pilot transmission mode, compare with embodiment five, the pilot tone port PO RT6 of similar number, be more evenly distributed, simultaneously because two adjacent PORT6 are nearer at interval on time-domain, therefore better to the support of high-speed mobile, and other pilot tone do not had any influence.
But because the distribution density of pilot tone on frequency be less, to a little less than frequently selecting the support of more intense channel, demodulation performance descends to some extent.
Embodiment seven:
Particularly, at first, according to existing mode PORT0～PORT5 is set in each Resource Block, and in each Resource Block PORT6 is set further, the set-up mode of concrete PORT6 is:
9 PORT6 are set in a Resource Block, and these 9 PORT6 are divided into 3 groups;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
3 time resources of taking of group PORT6 are respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
Among PORT6 set-up mode in the present embodiment and the embodiment six essential PORT6 be provided with identically, promptly on the set-up mode basis of embodiment six, on the 3rd OFDM character position, PORT6 is set no longer.
Similar with preceding several embodiment, the PORT6 that carries out by the way is provided with, make the relative position of all PORT6 in this Resource Block and the time resource that takies fix, but the frequency resource that takies can change, promptly all PORT6 can be carried out whole displacement on frequency direction, thereby change concrete frequency location.For example, wherein the result that is provided with of a kind of PORT6 can be as shown in Figure 7.
In Fig. 7, the concrete frequency location of PORT6 as shown in the figure.In fact, also can be with all 12 PORT6 integral translation plurality of sub carrier bandwidths on frequency direction among Fig. 7.
In addition, by the contrast of Fig. 7 and Fig. 6 as seen, the difference that the two PORT6 is provided with only is not have PORT6 among Fig. 7 on the 3rd OFDM character position.
Above-mentioned is the set-up mode of example explanation PORT6 with a Resource Block only, in fact, need all carry out the setting of PORT6 by each Resource Block in the whole frequency band scope.
Next, after carrying out being provided with of PORT6, in Resource Block, have two kinds of special pilot frequency for user port PO RT5 and PORT6, for the user of dual data stream, can utilize PORT5 and effectively PORT6 carry out the dedicated pilot transmission of two data flow respectively.Usually, can utilize PORT5 and effective PORT6 to be respectively two data streams and carry out wave beam formation; Certainly, also can carry out the transmission of other special pilot frequency for user.
In the PORT6 setting and dedicated pilot transmission mode that present embodiment carries out, the Overhead that is brought by the setting of PORT6 is less with respect to embodiment five and embodiment six, and the problem that does not have adjacent sub-district Port5 and Port6 collision, do not have and the interactional problem of control channel data yet, what influence is other pilot tone do not had yet.
But because the Overhead of pilot tone is less, the demodulation performance of system descends to some extent, and in addition, the pilot density of Port5 and Port6 is different, and their demodulation performance also has certain difference.But the data flow of port6 can adopt and reduce encoding rate and adopt than low modulation mode compensating loss of energy.
By the setting of above several PORT6, the system that makes can support the dedicated pilot transmission of dual data stream, and the wave beam that carries out dual data stream forms.Above-mentioned pilot tone setting not only can also can be transmitted the pilot tone setting of (CoMP) as multipoint cooperative as the transmission of supporting the UE-Specific data.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.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 (9)
1. the transmission method of a special pilot frequency for user is provided with the first special pilot frequency for user port PO RT5 in advance in each Resource Block, it is characterized in that this method further comprises:
The second special pilot frequency for user port PO RT6 is set in each Resource Block in advance, in the transmission of dual data stream, utilize the special pilot frequency for user of a data flow of first special pilot frequency for user port PO RT5 transmission that is provided with, utilize the second special pilot frequency for user port PO RT6 that is provided with to transmit the special pilot frequency for user of another data flow.
2. method according to claim 1 is characterized in that, when adopting normal CP, the second special pilot frequency for user port PO RT6 is set in arbitrary Resource Block in advance comprises:
12 second special pilot frequency for user port PO RT6 are set in described arbitrary Resource Block, and these 12 PORT6 are divided into 4 groups,
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that the PORT6 of 4 groups takies is respectively the 4th, 7,10,13 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first PORT6 of another group, 1 subcarrier bandwidth in interval on frequency.
3. method according to claim 1 is characterized in that, when adopting normal CP, the second special pilot frequency for user port PO RT6 is set in arbitrary Resource Block in advance comprises:
9 essential PORT6 and 3 optional PORT6 are set in described arbitrary Resource Block, and wherein 9 essential PORT6 are divided into 3 groups, and 3 optional PORT6 are as 1 group;
9 essential PORT6 are effective all the time, and when the OFDM number that is used for control channel of PCFICH indication was less than 3, optional 3 PORT6 were effective, and take the position of the 3rd OFDM symbol; When the OFDM number that is used for control channel of PCFICH indication equaled 3, optional 3 PORT6 were invalid;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that 3 group PORT6 of essential PORT6 take is respectively the 6th, 11,14 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency;
The described PORT6 of utilization transmission user dedicated pilot is: utilize effective PORT6 transmission user dedicated pilot.
4. method according to claim 1 is characterized in that, when adopting normal CP, the second special pilot frequency for user port PO RT6 is set in arbitrary Resource Block in advance comprises:
9 PORT6 are set in described arbitrary Resource Block, and these 9 PORT6 are divided into 3 groups;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
3 time resources of taking of group PORT6 are respectively the 6th, 11,14 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
5. method according to claim 1 is characterized in that, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
8 second special pilot frequency for user port PO RT6 are set in described arbitrary Resource Block, and these 8 PORT6 are divided into 2 groups,
4 PORT6 of every group take identical time resource, and adjacent two PORT6 are 2 subcarrier bandwidth in interval on frequency;
The time resource that 2 groups of PORT6 take is respectively the 5th, 11 OFDM symbol;
In 2 groups of PORT6, first PORT6 of one group and first PORT6 of another group are in adjacent subcarrier bandwidth on frequency.
6. method according to claim 1 is characterized in that, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
12 second special pilot frequency for user port PO RT6 are set in described arbitrary Resource Block, and these 12 PORT6 are divided into 3 groups,
4 PORT6 of every group take identical time resource, and adjacent two PORT6 are 2 subcarrier bandwidth in interval on frequency;
The time resource that 3 groups of PORT6 take is respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first PORT6 of another group are in adjacent subcarrier bandwidth on frequency, and first group of PORT6 takies identical frequency resource with the 3rd group of PORT6.
7. method according to claim 1 is characterized in that, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
9 essential PORT6 and 3 optional PORT6 are set in described arbitrary Resource Block, and wherein 9 essential PORT6 are divided into 3 groups, and 3 optional PORT6 are as 1 group;
9 essential PORT6 are effective all the time, and when the OFDM number that is used for control channel of PCFICH indication was less than 3, optional 3 PORT6 were effective, and take the position of the 3rd OFDM symbol; When the OFDM number that is used for control channel of PCFICH indication equaled 3, optional 3 PORT6 were invalid;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
The time resource that 3 group PORT6 of essential PORT6 take is respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency;
The described PORT6 of utilization transmission user dedicated pilot is: utilize effective PORT6 transmission user dedicated pilot.
8. method according to claim 1 is characterized in that, when adopting long CP, the described second special pilot frequency for user port PO RT6 that is provided with in arbitrary Resource Block in advance comprises:
9 PORT6 are set in described arbitrary Resource Block, and these 9 PORT6 are divided into 3 groups;
3 PORT6 of every group take identical time resource, and adjacent two PORT6 are 3 subcarrier bandwidth in interval on frequency;
3 time resources of taking of group PORT6 are respectively the 6th, 9,12 OFDM symbol;
In two adjacent groups PORT6, first PORT6 of one group and first other one group PORT6,1 subcarrier bandwidth in interval on frequency.
9. according to arbitrary described method in the claim 1 to 8, it is characterized in that the special pilot frequency for user that two special pilot frequency for user port PO RT5 of described utilization setting and PORT6 transmit two data flow respectively is: the wave beam that utilizes two special pilot frequency for user port PO RT5 being provided with and PORT6 to carry out two data flow respectively forms.
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| CN200810240730A CN101764776A (en) | 2008-12-23 | 2008-12-23 | Transmission method of special pilot frequency for user |
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| CN200810240730A CN101764776A (en) | 2008-12-23 | 2008-12-23 | Transmission method of special pilot frequency for user |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014201620A1 (en) * | 2013-06-18 | 2014-12-24 | 华为技术有限公司 | Method and device for detecting and sending downlink control information |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014201620A1 (en) * | 2013-06-18 | 2014-12-24 | 华为技术有限公司 | Method and device for detecting and sending downlink control information |
| US9980261B2 (en) | 2013-06-18 | 2018-05-22 | Huawei Technologies Co., Ltd. | Methods for detecting and sending downlink control information and devices |
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