CN101222263B - Method and device for mapping pilot signal in unicast and broadcast/multicast mode - Google Patents
Method and device for mapping pilot signal in unicast and broadcast/multicast mode Download PDFInfo
- Publication number
- CN101222263B CN101222263B CN2007100364614A CN200710036461A CN101222263B CN 101222263 B CN101222263 B CN 101222263B CN 2007100364614 A CN2007100364614 A CN 2007100364614A CN 200710036461 A CN200710036461 A CN 200710036461A CN 101222263 B CN101222263 B CN 101222263B
- Authority
- CN
- China
- Prior art keywords
- pilot sign
- frequency pilot
- unicast service
- frequency
- multimedia broadcast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a method for mapping pilot signal in the multiplexing mode of unicast service and multimedia broadcast/multicast service. The method comprises the following steps: the pilot frequency symbols of unicast service and multimedia broadcast/multicast are respectively generated; therefore, within a subframe, the pilot frequency symbols of multimedia broadcast/multicast maps the pilot frequency symbols of both multimedia broadcast/multicast service and unicast service to a plurality of transmitting antennas in the mode that the two pilot frequency symbols in time domain direction on each transmitting antenna are aligned, while the two adjacent pilot frequency symbols on both transmitting antennas are interlaced in frequency domain direction; moreover, the pilot frequency symbols of time division multiplexing (TDM) unicast service and multimedia broadcast/multicast service are transmitted by the transmitting antennas. On the contrary, the two pilot frequency symbols of multimedia broadcast/multicast service in time domain direction on each transmitting antenna are interlaced, while the two adjacent pilot frequency symbols on both transmitting antennas are aligned in frequency domain direction within the subframe.
Description
Technical field
The present invention relates to a kind of under clean culture and broadcast/multi broadcast business multiplexer mode the method and apparatus of mapping pilot signal.Particularly, relate under clean culture and broadcast/multi broadcast multiplexer mode, the method and apparatus of the pilot signal of mapping clean culture and broadcast/multi broadcast business in multiaerial system so that the pilot signal that is applicable to the multiple transmit antenna system to be provided, and obtains frequency diversity gain.
Background technology
3GPP (third generation partner program) has started Long Term Evolution research project (LTE:Long Term Evolution) in 2005, hope is with higher data throughout and better network performance, for operator and the ever-increasing demand of user provide support.
Multimedia broadcast/multi broadcast business (MBMS:Multimedia Broadcast/MulticastService) is the business that 3GPP Rel.6 introduces, be meant that a data source sends the point-to-multipoint service of data to a plurality of users, thereby realize network (comprising core net and Access Network) resource-sharing, with the service of the least possible resource realization to media user as much as possible, as to have same requirements.At wireless access network, MBMS is professional can to realize the classes of messages multicast and the broadcasting of plain text low rate by using the carrying of Common transport channel and public wireless, also can realize the multicast and the broadcasting of the multimedia service of higher rate, for example, and mobile TV.
At present, in 3GPP, use the situation of single antenna to design corresponding pilot signal mapping method at unicast service and broadcast/multi broadcast business respectively, that is, and the method for pilot signal transmitted on single antenna.
In the LTE project, clearly propose, should support the MBMS business (E-MBMS) that strengthens.E-MBMS can and the professional common same carrier wave that uses of clean culture (unicast), also can independently use a carrier wave, i.e. Single Frequency Network (SFN:Single Frequency Network) pattern.Tight integrated can the providing to the user effectively of clean culture and MBMS business provides service.
Yet the pilot signal that relates to the E-MBMS business in the existing protocol is shone upon at the single transmit antenna.Under E-MBMS business and the time-multiplexed situation of unicast service, in the E-MBMS subframe, place two class pilot signals, a class is used for the E-MBMS Traffic Channel and estimates the another kind of unicast service channel estimating that is used for.
When considering the coexistence of unicast service and E-MBMS mix of traffic, promptly two kinds of business are when the subframe rank is carried out Time Division Multiplexing, " gap " appears when insertion owing to the E-MBMS subframe causes that unicast service carried out channel estimating in order to overcome in the unicast frame, pilot signal is also placed in position corresponding in the E-MBMS subframe, be used for the channel estimating of unicast service, thereby avoid the appearance in " gap ".The situation of single-shot antenna carries out but above-mentioned research all is based on.
Yet, under E-MBMS business and the time-multiplexed situation of unicast service, also do not have the pilot signal mapping problems of consideration based on multiple transmit antenna.In other words, considering under E-MBMS business and the time-multiplexed situation of unicast service, only placing a class common pilot signal in the subframe of E-MBMS and be used for the estimation of E-MBMS Traffic Channel.
At present, also do not propose when number of transmit antennas greater than 1 the time, how pilot signal is set in the E-MBMS subframe and it is mapped to multiple transmit antenna, so that can carry out channel estimating to E-MBMS is professional with unicast service simultaneously according to the pilot signal that is received at receiving terminal.
Summary of the invention
The purpose of this invention is to provide a kind of method and apparatus that in E-MBMS business and unicast service time division multiplexing, produces pilot signal, be used for shining upon two class pilot signals and emission to multiple transmit antenna, so that can carry out channel estimating to E-MBMS business and unicast service respectively at receiving terminal according to the pilot signal that is received.
In order to realize the present invention, according to an aspect of the present invention, provide a kind of under clean culture and multimedia broadcast/multi broadcast business multiplexer mode the method for mapping pilot signal, comprise step: generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively; With in subframe, the frequency pilot sign that makes multimedia broadcast/multi broadcast business is in two the frequency pilot sign alignment of every transmit antennas along the time domain direction, and two adjacent pilot symbols on two transmit antennas are in the mode of frequency domain direction setting interlaced with each other, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business, and shine upon the frequency pilot sign of unicast service simultaneously; The frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business, and by many transmit antennas emissions; With at receiving terminal, receive described pilot signal, and unicast service and multimedia broadcast/multi broadcast business carried out channel estimating respectively according to the pilot signal that receives.
According to another aspect of the present invention, provide a kind of under unicast service and multimedia broadcast/multi broadcast business multiplexer mode the method for mapping pilot signal, comprise step: generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively; With in subframe, the frequency pilot sign that makes multimedia broadcast/multi broadcast business is in two the frequency pilot sign interlaced with each other settings of every transmit antennas along the time domain direction, and the mode that two adjacent pilot symbols on two transmit antennas are provided with in the frequency domain direction alignment, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business, and shine upon the frequency pilot sign of unicast service simultaneously; The frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business, and by many transmit antennas emissions; At receiving terminal, receive described pilot signal, and unicast service and multimedia broadcast/multi broadcast business are carried out channel estimating respectively according to the pilot signal that receives.
According to a further aspect of the invention, provide a kind of method that under unicast service and multimedia broadcast/multi broadcast business multiplexer mode, produces pilot signal, comprise step: generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively; With in subframe, the frequency pilot sign of multimedia broadcast/multi broadcast business is provided with in two frequency pilot sign alignment of every transmit antennas upper edge time domain direction, and two adjacent pilot symbols on two transmitting antennas are provided with in frequency domain direction mode interlaced with each other, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business; The frequency pilot sign of time division multiplexing unicast service and the frequency pilot sign of multimedia broadcast/multi broadcast business are to obtain the time division multiplexed pilots signal of unicast service and multimedia broadcast/multi broadcast business.
According to a further aspect of the invention, provide a kind of method that under unicast service and multimedia broadcast/multi broadcast business multiplexer mode, produces pilot signal, comprise step: generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively; With in subframe, make of two the frequency pilot sign interlaced with each other settings of the frequency pilot sign of multimedia broadcast/multi broadcast business in every transmit antennas upper edge time domain direction, and two adjacent pilot symbols on two transmit antennas are provided with in the mode of frequency domain direction alignment, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business; The frequency pilot sign of time division multiplexing unicast service and the frequency pilot sign of multimedia broadcast/multi broadcast business are to obtain the time division multiplexed pilots signal of unicast service and multimedia broadcast/multi broadcast business.
According to a further aspect of the invention, provide a kind of under unicast service and multimedia broadcast/multi broadcast business multiplexer mode the device of mapping pilot signal, comprise: the frequency pilot sign maker is used to generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business; The frequency pilot sign that provides according to described frequency pilot sign maker is provided unicast service frequency pilot sign mapping template generator, and mapping is used for the frequency pilot sign of the channel estimating of unicast service on multiple transmit antennas; Multimedia broadcast/multi broadcast business frequency pilot sign mapping template generator, the frequency pilot sign that provides according to the frequency pilot sign maker, with in subframe, the frequency pilot sign of multimedia broadcast/multi broadcast business is provided with in two frequency pilot sign alignment of every transmit antennas upper edge time domain direction, and in two adjacent pilot symbols of two transmit antennas mode in frequency domain direction setting interlaced with each other, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business, and shine upon the frequency pilot sign of unicast service simultaneously; The pilot signal synthesizer is used for the frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business.
According to a further aspect of the invention, provide a kind of under unicast service and multimedia broadcast/multi broadcast business multiplexer mode the device of mapping pilot signal, comprise: the frequency pilot sign maker is used to generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business; The frequency pilot sign that provides according to described frequency pilot sign maker is provided unicast service frequency pilot sign mapping template generator, and mapping is used for the frequency pilot sign of the channel estimating of unicast service on multiple transmit antennas; Multimedia broadcast/multi broadcast business frequency pilot sign mapping template generator, the frequency pilot sign that provides according to the frequency pilot sign maker, with in subframe, make of two the frequency pilot sign interlaced with each other settings of the frequency pilot sign of multimedia broadcast/multi broadcast business in every transmit antennas upper edge time domain direction, and the mode that is provided with in the frequency domain direction alignment in two adjacent pilot symbols of two transmit antennas, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business, and shine upon the frequency pilot sign of unicast service simultaneously; The pilot signal synthesizer is used for the frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business.
According to the method to multiple transmit antenna system map pilot signal of the present invention, can carry out channel estimating to multimedia broadcast/multi broadcast business and unicast service respectively at receiving terminal according to the pilot signal that is received.
Description of drawings
By below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 a to 1d shows different embodiment according to the subject invention respectively, the schematic layout pattern of the pilot signal of shining upon to multiple transmit antenna in E-MBMS business and unicast service time division multiplexing;
Fig. 2 is the block diagram according to the device of embodiment of the invention mapping clean culture and broadcast/multi broadcast pilot signal;
Fig. 3 is the flow chart that shines upon the method for clean culture and broadcast/multi broadcast pilot signal according to the embodiment of the invention in subframe;
Fig. 4 be according to the present invention under clean culture and broadcast/multi broadcast business multiplexer mode, at the flow chart of multiple transmit antenna to the method for mapping pilot signal;
Fig. 5 is the simulation result schematic diagram according to the Block Error Rate (BLER) of the pilot signal of embodiments of the invention mapping;
Fig. 6 is the simulation result schematic diagram of the BLER of the pilot signal of shining upon according to a further embodiment of the invention; With
Fig. 7 is the simulation result schematic diagram of the BLER of the pilot signal of another embodiment mapping according to the present invention.
Embodiment
To a preferred embodiment of the present invention will be described in detail, having omitted in the description process is unnecessary details and function for the present invention with reference to the accompanying drawings, obscures to prevent that the understanding of the present invention from causing.
Be described in a plurality of embodiment of the pilot signal of shining upon to multiple transmit antenna in E-MBMS business and the unicast service time division multiplexing below with reference to Fig. 1 a to 1d.
First embodiment of mapping pilot signal is described with reference to figure 1a.The mapping layout of the pilot signal in the Transmission Time Interval (TTI) has been shown among Fig. 1 a.As shown in Figure 1a, transverse axis is represented time domain, and the longitudinal axis is represented frequency domain.Can comprise two subframes among the TTI, each subframe is divided into a plurality of time slot t.In this enforcement, each subframe can comprise 6 time slots (for example, be followed successively by t1 from left to right, t2, t3, t4, t5, t6).In addition, each time slot can comprise the subcarrier of different frequency (for example, being followed successively by f1 from top to bottom, f2, f3, f4, f5, f6, f7, f8 etc.).In Fig. 1 a, with regard to the time domain direction, each lattice is represented an OFDM (OFDM) symbol.
Be that example illustrates the method to two transmitting antenna mapping pilot signals with two antennas in the present embodiment.It will be understood by those skilled in the art that the present invention is not limited to this, but basic thought of the present invention can be applied to the multiple transmit antenna system more than two.
In Fig. 1, pattern
Expression is at the pilot signal u1 of unicast service to antenna 1 mapping; Pattern
Expression is at the pilot signal u2 of unicast service to antenna 2 mappings; Pattern
Expression is at the pilot signal M1 of broadcast/multi broadcast business to antenna 1 mapping; Pattern
Expression is at the pilot signal M2 of broadcast/multi broadcast business to antenna 2 mappings.Blank grid among Fig. 1 padding data of indicating.
As shown in Figure 1a, at first in time slot t1, shine upon pilot signal u1 and the u2 that is used for unicast service.Unicast service is mapped to respectively in the different sub carrier of same time slot t1 at the frequency pilot sign u1 of antenna 1 with at the frequency pilot sign u2 of antenna 2 apartly, and between each frequency pilot sign u1 and the u2 number of subcarriers at interval be identical, for example, as shown in Figure 1a, the interval of u1 and u2 can be 2 subcarriers.
After this, the E-MBMS business is mapped to respectively among time slot t2 and the t3 at the frequency pilot sign M1 of antenna 1 with at the frequency pilot sign M2 of antenna 2.For example, as shown in Figure 1a, in time slot t2, shine upon M1, in time slot t3, shine upon M2.M1 and M2 are adjacent on time domain, but interlaced with each other on frequency domain.Equally, between each frequency pilot sign M1 and the M2 the quantity of subcarrier at interval be identical, for example, 3 subcarriers of can being separated by of the pilot signal in same time slot.
Next, at frequency pilot sign u1 and the u2 of time slot t4 mapping unicast service at antenna 1 and antenna 2.Compare with the frequency pilot sign of the unicast service that shines upon at time slot t1, the position of u1 and u2 is put upside down each other.Equally, in time slot t4, the interval of u1 and u2 can be 2 subcarriers.
Then, in time slot t5 and t6, shine upon the E-MBMS business respectively at the frequency pilot sign M1 of antenna 1 with at the frequency pilot sign M2 of antenna 2.M1 and M2 in time slot t5 and t6 the mapping order and shared OFDM symbol the OFDM symbol with shared is identical in proper order with its mapping in time slot t2 and t3 respectively.
In first embodiment of the method for the mapping frequency pilot sign shown in Fig. 1 a, the load of all frequency pilot signs is 27.78%, wherein is used for E-MBMS Traffic Channel estimated pilot signal and has identical load 16.7%.In addition, as shown in Figure 1a, in subframe, the pilot signal u1 that is used for the unicast service channel estimating has identical mapping template with u2 at different time slots.Be used for E-MBMS Traffic Channel estimated pilot signal M1 and also have identical mapping template with M2.For the frequency pilot sign of E-MBMS business, in this subframe, 2 frequency pilot sign M1 that are mapped to transmitting antenna 1 are along the alignment of time domain direction, and 2 OFDM symbols promptly, are the cycle with three OFDM symbols at interval.Along 3 subcarriers in frequency domain direction interval, that is, it is the cycle with four subcarriers.In addition, for the frequency pilot sign of E-MBMS business, in this subframe, be mapped to two adjacent frequency pilot sign M1 on two transmit antennas and M2 along frequency domain direction arrangement interlaced with each other.In other words, in a subframe, be used for E-MBMS Traffic Channel estimated pilot signal, with regard to same transmit antennas, two frequency pilot sign M1 or M2 are separately along time domain direction alignment (being in identical frequency), and with regard to two transmit antennas, two adjacent frequency pilot sign M1 and M2 are staggered at frequency domain direction.
So far, finished in unicast service and the E-MBMS service time division multiplex pattern pilot signal mapping process that subframe is interior.Unicast service is identical with the mapping process and the said process of E-MBMS service pilot symbol in the next subframe, constitutes a TTI thus.
Below with reference to second embodiment of Fig. 1 b description according to the pilot signal mapping method in unicast service of the present invention and the E-MBMS service time division multiplex pattern.For simplicity, this omitted to the description of the first embodiment identical content.
Shown in Fig. 1 b, the process of describing among the pilot signal u1 of unicast service and the mapping process of u2 and first embodiment is identical, and u1 and u2 position and put in order etc. with first embodiment in identical, that is, be mapped among time slot t1 and the t4.The difference of second embodiment and first embodiment is the mapping process of the frequency pilot sign of E-MBMS business.
According to second embodiment, in a subframe, shine upon the frequency pilot sign M1 of E-MBMS business at antenna 1 at time slot t2 and t5, shine upon the frequency pilot sign M2 of E-MBMS business at time slot t3 and t6 at antenna 2.Different with first embodiment, at second embodiment, two adjacent frequency pilot sign M1 and M2 are in frequency domain direction (that is, along the time domain direction) alignment, shown in M1 and M2 among time slot t2 and the t3.In addition, in a subframe, the frequency pilot sign that is mapped to same antenna is interlaced with each other along the time domain direction, for example, shown in Fig. 1 b, the frequency pilot sign M1 among time slot t2 and the time slot t5 is interlaced with each other, and the frequency pilot sign M2 among time slot t3 and the time slot t6 also is interlaced with each other.
In second embodiment of the method for the mapping frequency pilot sign shown in Fig. 1 b, the load of all frequency pilot signs is 27.78%, wherein is used for E-MBMS Traffic Channel estimated pilot signal and has identical load 16.7%.In addition, shown in Fig. 1 b, the pilot signal u1 that is used for the unicast service channel estimating has identical mapping template with u2.Be used for E-MBMS Traffic Channel estimated pilot signal M1 and also have identical mapping template with M2.For the frequency pilot sign of E-MBMS business, in this subframe, 2 frequency pilot sign M1 that are mapped to transmitting antenna 1 are staggered along the time domain direction, and 2 the OFDM symbols in interval are along 3 subcarriers in frequency domain direction interval.In addition, for the frequency pilot sign M1 and the M2 of E-MBMS business, in this subframe, arrangement is in alignment with each other at frequency domain direction (that is, along the time domain direction) to be mapped to two adjacent frequency pilot sign M1 on two transmit antennas and M2.In other words, in a subframe, be used for E-MBMS Traffic Channel estimated pilot signal, with regard to same transmit antennas, two frequency pilot sign M1 or M2 are separately along time domain direction staggered (being in different frequency), and with regard to two transmit antennas, two adjacent frequency pilot sign M1 and M2 arrange in frequency domain direction (that is, along the time domain direction) alignment.
So far, finished in unicast service and the E-MBMS service time division multiplex pattern pilot signal mapping process that subframe is interior.Unicast service is identical with the mapping process and the said process of E-MBMS service pilot symbol in the next subframe, constitutes a TTI thus.
Below with reference to three embodiment of Fig. 1 c description according to the pilot signal mapping method in unicast service of the present invention and the E-MBMS service time division multiplex pattern.For simplicity, this omitted to the description of the first embodiment identical content.
Shown in Fig. 1 c, the process that the pilot signal u1 of unicast service and u2 describe in the mapping process of time slot t1 and first embodiment is identical, and identical shown in u1 and u2 position and the time slot t1 with first embodiment such as put in order.In the 3rd embodiment, removed second pilot signal that is used for the unicast tunnel estimation, that is, and padding data symbol in the subcarrier at time slot t4 place.In the 3rd embodiment shown in Fig. 1 c, the frequency pilot sign M1 of E-MBMS business and the mapping process of M2 are identical with the M2 mapping process with M1 among first embodiment, omit description to them at this.
In the 3rd embodiment of the method for the mapping frequency pilot sign shown in Fig. 1 c, owing to removed second frequency pilot sign of unicast service, the load of all frequency pilot signs is 22.22%, wherein is used for E-MBMS Traffic Channel estimated pilot signal and has identical load 16.7%.In addition, owing to removed second frequency pilot sign of unicast service, therefore can improve the efficiency of transmission of E-MBMS business.Shown in Fig. 1 c, be used for E-MBMS Traffic Channel estimated pilot signal M1 and have identical mapping template with M2.For the frequency pilot sign of E-MBMS business, in this subframe, 2 frequency pilot sign M1 that are mapped to transmitting antenna 1 are along time domain direction (that is, at frequency domain direction) alignment, and 2 the OFDM symbols in interval are along 3 subcarriers in frequency domain direction interval.In addition, for the frequency pilot sign of E-MBMS business, in this subframe, be mapped to two adjacent frequency pilot sign M1 on two transmit antennas and M2 in frequency domain direction (that is, along the time domain direction) arrangement interlaced with each other.In other words, in a subframe, be used for E-MBMS Traffic Channel estimated pilot signal, with regard to same transmit antennas, two frequency pilot sign M1 or M2 are alignment (being in same frequency) along the time domain direction separately, and with regard to two transmit antennas, two adjacent frequency pilot sign M1 and M2 are staggered at frequency domain direction.
So far, finished in unicast service and the E-MBMS service time division multiplex pattern pilot signal mapping process that subframe is interior.Unicast service is identical with the mapping process and the said process of E-MBMS service pilot symbol in the next subframe, constitutes a TTI thus.
Below with reference to four embodiment of Fig. 1 d description according to the pilot signal mapping method in unicast service of the present invention and the E-MBMS service time division multiplex pattern.For simplicity, this omitted to the description of front embodiment identical content.
Shown in Fig. 1 d, the process of describing among the pilot signal u1 of unicast service and the mapping process of u2 and first embodiment is identical, and identical shown in u1 and u2 position and the time slot t1 with first embodiment such as put in order.
In the 4th embodiment, removed second pilot signal that is used for the unicast tunnel estimation, that is, and padding data in time slot t4.In the 4th embodiment shown in Fig. 1 d, the frequency pilot sign M1 of E-MBMS business and the mapping process of M2 are identical with the M2 mapping process with M1 among second embodiment shown in Fig. 1 b, omit description to them at this.
In the 4th embodiment of the method for the mapping frequency pilot sign shown in Fig. 1 d, owing to removed second frequency pilot sign of unicast service, the load of all frequency pilot signs is 22.22%, wherein is used for E-MBMS Traffic Channel estimated pilot signal and has identical load 16.7%.In addition, owing to removed second frequency pilot sign of unicast service, therefore can improve the efficiency of transmission of E-MBMS business.Shown in Fig. 1 d, be used for E-MBMS Traffic Channel estimated pilot signal M1 and have identical mapping template with M2.For the frequency pilot sign of E-MBMS business, in this subframe, 2 frequency pilot sign M1 that are mapped to transmitting antenna 1 are staggered along time domain direction (that is, at frequency domain direction), and 2 the OFDM symbols in interval are at 3 subcarriers in frequency domain direction interval.In addition, for the frequency pilot sign of E-MBMS business, in this subframe, arrangement is in alignment with each other at frequency domain direction (that is, along the time domain direction) to be mapped to two adjacent frequency pilot sign M1 on two transmit antennas and M2.In other words, in a subframe, be used for E-MBMS Traffic Channel estimated pilot signal, with regard to same transmit antennas, two frequency pilot sign M1 or M2 are separately along time domain direction staggered (being in different frequency), and with regard to two transmit antennas, two adjacent frequency pilot sign M1 and M2 arrange in frequency domain direction (that is, along the time domain direction) alignment.
So far, finished in unicast service and the E-MBMS service time division multiplex pattern pilot signal mapping process that subframe is interior.Unicast service is identical with the mapping process and the said process of E-MBMS service pilot symbol in the next subframe, constitutes a TTI thus.
In addition, in Fig. 1 a and 1c, the pilot signal u1 that is used for the unicast service channel estimating has identical mapping template with u2.In Fig. 1 b and 1d, the pilot signal u1 that is used for the unicast service channel estimating has identical mapping template with u2
A plurality of embodiment of the pilot signal of mapping unicast service and E-MBMS business in a plurality of transmitting antennas have been described above in unicast service and E-MBMS service time division multiplex pattern.After this, multi-transmitting antenna system is launched the pilot signal of being shone upon.At receiving terminal, such as mobile phone, portable computer, the mobile communication terminal of PDA(Personal Digital Assistant) and so on receives this pilot signal.Equipment in the receiving terminal carries out channel estimating according to the pilot signal that receives to unicast service and E-MBMS business.
Below with reference to Fig. 2 block diagram according to the device of the mapping clean culture of the embodiment of the invention and broadcast/multi broadcast pilot signal is described.Device according to mapping pilot signal of the present invention comprises frequency pilot sign maker 21, unicast service frequency pilot sign mapping template generator 22, E-MBMS service pilot sign map template generator 23 and pilot signal synthesizer 24.
The operation of the device of mapping pilot signal of the present invention is described below.Frequency pilot sign maker 21 generates the frequency pilot sign that is used for unicast service and E-MBMS business, and the frequency pilot sign that is generated is offered unicast service frequency pilot sign mapping template generator 22 and E-MBMS service pilot sign map template generator 23 respectively.In the present invention, as an example, frequency pilot sign maker 21 can adopt typical B PSK modulation, and usually with power ascension 3dB.The frequency pilot sign that unicast service frequency pilot sign mapping template generator 22 provides according to frequency pilot sign maker 21, according to any mode of describing among first to fourth embodiment of front, mapping is used for the frequency pilot sign of the channel estimating of unicast service on two antennas.The frequency pilot sign that E-MBMS service pilot sign map template generator 23 provides according to frequency pilot sign maker 21, according to any mode of describing among first to fourth embodiment of front, mapping is used for the frequency pilot sign of the channel estimating of E-MBMS business on two antennas.The frequency pilot sign of unicast service frequency pilot sign mapping template generator 22 and 23 mappings of E-MBMS service pilot sign map template generator offers pilot signal synthesizer 24.The data that 24 pairs of data symbols of pilot signal synthesizer maker (not shown) provides be mapped to the frequency pilot sign of two unicast services on the antenna and the frequency pilot sign of E-MBMS business carries out time division multiplexing, to obtain the pilot signal in the subframe.After this send resulting pilot signal by multiple transmit antenna.
Be described in the process of shining upon the method for clean culture and broadcast/multi broadcast pilot signal in the subframe below with reference to Fig. 3.At first, at frame a, generate the frequency pilot sign that is used for unicast service and E-MBMS business by the frequency pilot sign maker.Next, can the frequency pilot sign that be generated be divided into four branches according to any mode of describing among first to fourth embodiment of front.The frequency pilot sign u1 that is used for unicast service in frame b1 branch in a subframe is mapped to the 1st antenna; The frequency pilot sign u2 that is used for unicast service in frame b2 branch in a subframe is mapped to the 2nd antenna; The frequency pilot sign M1 that is used for the E-MBMS business in frame c1 branch in a subframe is mapped to the 1st antenna; Be mapped to the 2nd antenna with the frequency pilot sign M2 that is used for the E-MBMS business in frame c2 branch in a subframe.Be noted that above-mentioned b1 to c2 branch can executed in parallel.After this,, the frequency pilot sign of the unicast service that shines upon on two antennas and the frequency pilot sign of E-MBMS are carried out time division multiplexing, obtain any one the described pilot signal among first to fourth embodiment of front at frame d.Then, the data symbol that is generated by the data symbol maker among resulting pilot signal and the frame e is synthesized,, and send resulting pilot signal by multiple transmit antenna with the signal that obtains to launch in the subframe.
Be noted that the main distinction of describing among first to fourth embodiment of the method for mapping pilot signal on multiple transmit antenna is the mapping method to the pilot signal of E-MBMS business.Pilot signal for the E-MBMS business, first identical with the mapping method of the 3rd embodiment (referring to Fig. 1 a and 1c), promptly, in a subframe, be used for E-MBMS Traffic Channel estimated pilot signal, with regard to same transmit antennas, two frequency pilot sign M1 or M2 are alignment (being in same frequency) along the time domain direction separately, and with regard to two transmit antennas, two adjacent frequency pilot sign M1 and M2 are staggered (hereinafter being referred to as to shine upon template A) at frequency domain direction.In addition, second identical with the mapping method of the 4th embodiment (referring to Fig. 1 b and 1d), promptly, in a subframe, be used for E-MBMS Traffic Channel estimated pilot signal, with regard to same transmit antennas, two frequency pilot sign M1 or M2 are separately along time domain direction staggered (being in different frequency), and with regard to two transmit antennas, two adjacent frequency pilot sign M1 and M2 arrange (hereinafter being referred to as to shine upon template B) in frequency domain direction (that is, along the time domain direction) alignment.
Fig. 4 shows according to the present invention under clean culture and broadcast/multi broadcast business multiplexer mode, at the flow chart of multiple transmit antenna to the method for mapping pilot signal.
At first, at step S41, generation is used for the frequency pilot sign of unicast service and the frequency pilot sign of E-MBMS business.After this, at step S42, on multiple transmit antenna, shine upon the frequency pilot sign of unicast service and frequency pilot sign and E-MBMS business respectively, to obtain time-multiplexed pilot signal.Next, in subframe, do not shine upon the OFDM symbol padding data symbol of frequency pilot sign, to obtain the synthetic pilot signal under unicast service and the E-MBMS service time division multiplex pattern.Then, at step S44, by the synthetic pilot signal of multiaerial system emission.At step S45,,, respectively unicast service and E-MBMS business are carried out channel estimating according to the pilot signal that receives at receiving terminal.
Fig. 5-7 is respectively the simulation result schematic diagram according to the Block Error Rate (BLER) of the pilot signal of embodiments of the invention mapping.
In the process of the pilot signal template of above-mentioned two kinds of E-MBMA business being carried out the Block Error Rate performance simulation, adopt the QPSK modulation, and used the turbo chnnel coding.The space division multiplexing technology of two branch roads adopts MIMO (multiple-input and multiple-output) transmission plan.Can suppose based on desirable FFT and detect.In emulation, do bilinear interpolation based on every TTI, thereby can fairly compare two kinds of pilot signal template A and template B.
Fig. 5 is to be 30km/h in vehicular speeds, the QPSK modulation down, the BLER performance curve of following two kinds of pilot tone template A of R=1/3 situation and B; Fig. 6 is to be 120km/h in vehicular speeds, the QPSK modulation down, the BLER performance curve of following two kinds of pilot tone template A of R=1/3 situation and B; Fig. 7 is under vehicular speeds is modulated for 350km/h QPSK, the BLER performance curve of following two kinds of pilot tone template A of R=1/3 situation and B.
By Fig. 5 to 7, the performance of pilot signal template A is better than template B.In vehicular speeds is 30km/h and 120km/h, BLER=10
-2The time, template A obtains approximate 0.25dB performance gain.And work as vehicular speeds is 350km/h, BLER=10
-1The time, template A obtains same approximate gain.When template A with template B relatively the time, the acquisition of performance gain mainly be because frequency pilot sign on two transmit antennas in frequency domain direction (along the time domain) mapping that interlock, thereby the acquisition frequency diversity gain, and this gain increases with UE speed.
Be noted that the present invention is not limited to enforcement described above mile, can also expand to other technical field, the present invention all can be considered in the place that relates to pilot signal design, perhaps technical scheme of the present invention can be applied to other Related product or method.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations under the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited by claims.
Claims (27)
1. the method for a mapping pilot signal under clean culture and multimedia broadcast/multi broadcast business multiplexer mode comprises step:
Generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively;
With in subframe, the frequency pilot sign that makes multimedia broadcast/multi broadcast business is in two the frequency pilot sign alignment of every transmit antennas along the time domain direction, and two adjacent pilot symbols on two transmit antennas are in the mode of frequency domain direction setting interlaced with each other, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business, and shine upon the frequency pilot sign of unicast service simultaneously;
The frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business to be obtaining time-multiplexed pilot signal, and by many transmit antennas emissions; With
At receiving terminal, receive described pilot signal, and unicast service and multimedia broadcast/multi broadcast business are carried out channel estimating respectively according to the pilot signal that receives.
2. method according to claim 1 also is included in the subcarrier place of not shining upon frequency pilot sign in the subframe and inserts data symbol.
3. method according to claim 1 and 2, wherein in a subframe, the frequency pilot sign of described multimedia broadcast/multi broadcast business in every antenna along time domain direction two OFDM symbols of being separated by, and at same time slot, along frequency domain direction three subcarriers of being separated by.
4. method according to claim 1 and 2, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in two time slots.
5. method according to claim 1 and 2, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in the time slot.
6. method according to claim 1 and 2, the quantity of wherein said many transmit antennas are two.
7. the method for a mapping pilot signal under unicast service and multimedia broadcast/multi broadcast business multiplexer mode comprises step:
Generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively;
With in subframe, the frequency pilot sign that makes multimedia broadcast/multi broadcast business is in two the frequency pilot sign interlaced with each other settings of every transmit antennas along the time domain direction, and the mode that two adjacent pilot symbols on two transmit antennas are provided with in the frequency domain direction alignment, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business, and shine upon the frequency pilot sign of unicast service simultaneously;
The frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business to be obtaining time-multiplexed pilot signal, and by many transmit antennas emissions;
At receiving terminal, receive described pilot signal, and unicast service and multimedia broadcast/multi broadcast business are carried out channel estimating respectively according to the pilot signal that receives.
8. method according to claim 7 also is included in the subcarrier place of not shining upon frequency pilot sign in the subframe and inserts data symbol.
9. according to claim 7 or 8 described methods, wherein in a subframe, the frequency pilot sign of described multimedia broadcast/multi broadcast business is at every antenna upper edge time domain direction two OFDM symbols of being separated by, and at same time slot, along frequency domain direction three subcarriers of being separated by.
10. according to claim 7 or 8 described methods, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in two time slots.
11. according to claim 7 or 8 described methods, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in the time slot.
12. according to claim 7 or 8 described methods, the quantity of wherein said many transmit antennas is two.
13. a method that produces pilot signal under unicast service and multimedia broadcast/multi broadcast business multiplexer mode comprises step:
Generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively;
With in subframe, the frequency pilot sign of multimedia broadcast/multi broadcast business is provided with in two frequency pilot sign alignment of every transmit antennas upper edge time domain direction, and two adjacent pilot symbols on two transmit antennas are provided with in frequency domain direction mode interlaced with each other, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business;
The frequency pilot sign of time division multiplexing unicast service and the frequency pilot sign of multimedia broadcast/multi broadcast business are to obtain the time division multiplexed pilots signal of unicast service and multimedia broadcast/multi broadcast business.
14. method according to claim 13 also is included in the subcarrier place of not shining upon frequency pilot sign in the subframe and inserts data symbol.
15. according to claim 13 or 14 described methods, wherein in a subframe, the frequency pilot sign of described multimedia broadcast/multi broadcast business is at every antenna upper edge time domain direction two OFDM symbols of being separated by, and at same time slot, along frequency domain direction three subcarriers of being separated by.
16. according to claim 13 or 14 described methods, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in two time slots.
17. according to claim 13 or 14 described methods, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in the time slot.
18. according to claim 13 or 14 described methods, the quantity of wherein said many transmit antennas is two.
19. a method that produces pilot signal under unicast service and multimedia broadcast/multi broadcast business multiplexer mode comprises step:
Generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business respectively;
With in subframe, make of two the frequency pilot sign interlaced with each other settings of the frequency pilot sign of multimedia broadcast/multi broadcast business in every transmit antennas upper edge time domain direction, and two adjacent pilot symbols on two transmit antennas are provided with in the mode of frequency domain direction alignment, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business;
The frequency pilot sign of time division multiplexing unicast service and the frequency pilot sign of multimedia broadcast/multi broadcast business are to obtain the time division multiplexed pilots signal of unicast service and multimedia broadcast/multi broadcast business.
20. method according to claim 19 also is included in the subcarrier place of not shining upon frequency pilot sign in the subframe and inserts data symbol.
21. according to claim 19 or 20 described methods, wherein in a subframe, the frequency pilot sign of described multimedia broadcast/multi broadcast business is at every antenna upper edge time domain direction two OFDM symbols of being separated by, and at same time slot, along frequency domain direction three subcarriers of being separated by.
22. according to claim 19 or 20 described methods, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in two time slots.
23. according to claim 19 or 20 described methods, wherein in a subframe, the frequency pilot sign of described unicast service is mapped in the time slot.
24. according to claim 19 or 20 described methods, the quantity of wherein said many transmit antennas is two.
25. the device of a mapping pilot signal under unicast service and multimedia broadcast/multi broadcast business multiplexer mode comprises:
The frequency pilot sign maker is used to generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business;
The frequency pilot sign that is used for unicast service that provides according to described frequency pilot sign maker is provided unicast service frequency pilot sign mapping template generator, and mapping is used for the frequency pilot sign of the channel estimating of unicast service on multiple transmit antennas;
Multimedia broadcast/multi broadcast business frequency pilot sign mapping template generator, the frequency pilot sign that is used for multimedia broadcast/multi broadcast business that provides according to the frequency pilot sign maker, with in subframe, the frequency pilot sign of multimedia broadcast/multi broadcast business is provided with in two frequency pilot sign alignment of every transmit antennas upper edge time domain direction, and in two adjacent pilot symbols of two transmit antennas mode, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business in frequency domain direction setting interlaced with each other;
The pilot signal synthesizer is used for the frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business.
26. the device of a mapping pilot signal under unicast service and multimedia broadcast/multi broadcast business multiplexer mode comprises:
The frequency pilot sign maker is used to generate the frequency pilot sign that is used for unicast service and multimedia broadcast/multi broadcast business;
The frequency pilot sign that is used for unicast service that provides according to described frequency pilot sign maker is provided unicast service frequency pilot sign mapping template generator, and mapping is used for the frequency pilot sign of the channel estimating of unicast service on multiple transmit antennas;
Multimedia broadcast/multi broadcast business frequency pilot sign mapping template generator, the frequency pilot sign that is used for multimedia broadcast/multi broadcast business that provides according to the frequency pilot sign maker, with in subframe, make of two the frequency pilot sign interlaced with each other settings of the frequency pilot sign of multimedia broadcast/multi broadcast business in every transmit antennas upper edge time domain direction, and the mode that is provided with in the frequency domain direction alignment in two adjacent pilot symbols of two transmit antennas, to the frequency pilot sign of many transmit antennas mapping multimedia broadcast/multi broadcast business;
The pilot signal synthesizer is used for the frequency pilot sign of time division multiplexing unicast service and multimedia broadcast/multi broadcast business.
27., also comprise the data symbol maker according to claim 25 or 26 described devices, be used to produce data symbol, described data symbol is inserted in the subcarrier place of not shining upon frequency pilot sign in the subframe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100364614A CN101222263B (en) | 2007-01-10 | 2007-01-10 | Method and device for mapping pilot signal in unicast and broadcast/multicast mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100364614A CN101222263B (en) | 2007-01-10 | 2007-01-10 | Method and device for mapping pilot signal in unicast and broadcast/multicast mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101222263A CN101222263A (en) | 2008-07-16 |
| CN101222263B true CN101222263B (en) | 2011-09-07 |
Family
ID=39631874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100364614A Active CN101222263B (en) | 2007-01-10 | 2007-01-10 | Method and device for mapping pilot signal in unicast and broadcast/multicast mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101222263B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944946A (en) * | 2009-07-08 | 2011-01-12 | 中兴通讯股份有限公司 | Wireless communication system and method and method for transmitting pilot frequency in wireless communication system |
| CN102088309B (en) * | 2009-12-04 | 2014-09-10 | 重庆无线绿洲通信技术有限公司 | Method and device for generating reference signal used for estimating channel quality |
| CN106209713A (en) * | 2015-05-06 | 2016-12-07 | 北京信威通信技术股份有限公司 | A kind of demodulation method in radio communication |
| CN106211021A (en) * | 2015-05-06 | 2016-12-07 | 北京信威通信技术股份有限公司 | A kind of pilot design method in radio communication |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714578A (en) * | 2002-08-07 | 2005-12-28 | 美商内数位科技公司 | Channel switching for support of multimedia broadcast and multicast services |
| CN1764086A (en) * | 2004-10-21 | 2006-04-26 | 华为技术有限公司 | System and method for realizing wireless broadcast multicast service synchronizing delivery |
-
2007
- 2007-01-10 CN CN2007100364614A patent/CN101222263B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714578A (en) * | 2002-08-07 | 2005-12-28 | 美商内数位科技公司 | Channel switching for support of multimedia broadcast and multicast services |
| CN1764086A (en) * | 2004-10-21 | 2006-04-26 | 华为技术有限公司 | System and method for realizing wireless broadcast multicast service synchronizing delivery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101222263A (en) | 2008-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101755397B (en) | A method and device for pilot mapping in multiplexing mode of unicast and broadcast/multicast services | |
| Montalban et al. | Multimedia multicast services in 5G networks: Subgrouping and non-orthogonal multiple access techniques | |
| CN103402248B9 (en) | Method and apparatus for downlink PDSCH power setting | |
| CN101795152B (en) | SC-OFDMA-based satellite mobile communication system for forward link | |
| CN101098159B (en) | Method and apparatus for transmitting and receiving evolved multimedia broadcast and multicast service data | |
| CN101375524B (en) | Transmission/reception apparatus and method for supporting mimo technology in a forward link of a high rate packet data system | |
| TWI335737B (en) | ||
| CN103763079B (en) | Wireless communication system with multiple transmission antennas using pilot subcarrier allocation | |
| CN101594175B (en) | Method, system and device for beamforming transmission | |
| CN102378110B (en) | Methods for sending and receiving demodulated reference signal (DM-RS) and devices for sending and receiving DM-RS | |
| US9509473B2 (en) | Method and device for sending and receiving a reference signal | |
| CN101001233A (en) | Method and equipment for transmitting downlink synchronous channel | |
| CN101371547B (en) | Method for operating communication system and receiving station | |
| CN104038311B (en) | A kind of PMCH transmission methods and equipment | |
| WO2011160473A1 (en) | Method and apparatus for transmitting channel measurement pilot | |
| CN101222263B (en) | Method and device for mapping pilot signal in unicast and broadcast/multicast mode | |
| CN101635589B (en) | Pilot frequency processing method | |
| CN102420794B (en) | 4M transmission method of OFDM structure of satellite CMMB system | |
| CN102843324B (en) | Method and system for transmitting enhanced pilot frequency under non-dedicated carrier wave of MBMS (model base management system) business | |
| CN102291685B (en) | Method and device for transmitting service | |
| CN102868657B (en) | Pilot frequency collocation method and system under a kind of MBMS special carrier | |
| KR101050620B1 (en) | Preprocessing method for symbol transmission using orthogonal frequency division multiplexing in wireless packet mobile communication system and base station transmitting device using same | |
| CN101610110A (en) | The method of system for accessing to multimedia broadcasting multicast, Apparatus and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI ALCATEL-LUCENT CO., LTD. Free format text: FORMER NAME: BEIER AERKATE CO., LTD., SHANGHAI |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai Patentee after: Shanghai Alcatel-Lucent Co., Ltd. Address before: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai Patentee before: Beier Aerkate Co., Ltd., Shanghai |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai Patentee after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai Patentee before: Shanghai Alcatel-Lucent Co., Ltd. |