CN101340232A - Transmission method and network appliance for multimedia broadcast multicast service - Google Patents

Abstract

The invention discloses a transmission method for multimedia broadcast and multicast service (MBMS), which includes the following steps: according to the principle that a channel has the strongest independence, spatial channels for transmitting the MBMS service in various periods of time are determined; on a spatial channel corresponding to each period of time, the MBMS service data is sent to a receiving terminal. The invention also discloses a network device which is used for transmitting the MBMS service. By adopting the technical proposal of the invention, the transmission property of the MBMS service can be effectively improved, and the coverage area of MBMS districts can be further enlarged.

Description

A kind of transmission method of multimedia broadcast-multicast service and the network equipment

Technical field

The present invention relates to the data transmission technology in the mobile communication, relate in particular to the transmission method and the network equipment of a kind of multimedia broadcasting and multicast service (MBMS).

Background technology

The rapid growth of the widely-used and mobile communication subscriber quantity of the fast development of mobile communication technology, mobile communications network makes the MBMS technology become one of hot spot technology in the present mobile communications network.MBMS is based on the technology of mobile communication cell net system, and it can realize the multimedia service multicast and the broadcasting of two-forty, thereby realizes sharing of Internet resources, and provides service with the least possible resource for the media user of same requirements as much as possible.

When MBMS transmission was professional, if adopt broadcast mode, network side was broadcasted to the cell range at receiving terminal place by the MBMS business datum that broadcast channel will transmit; If adopt the multicast mode, network side sends to the MBMS data group of a plurality of receiving terminals compositions that need this MBMS business simultaneously by broadcast channel.Then, obtain to come from the signal of network side by reception antenna, after resolving, recover the MBMS business datum as the subscriber equipment (UE) of receiving terminal.

Compare with the general data of transmitting on broadcast channel, the transmission rate of MBMS business is higher, and correspondingly, receiving terminal can correctly recover the required signal to noise ratio of MBMS business datum (SINR) also than general data height.Yet the downlink resource of network side is limited, and sufficiently high down transmitting power can't be provided for the high-speed transfer of MBMS business, so the signal to noise ratio of the professional transmission of MBMS is lower than the signal to noise ratio of transmission general data on the broadcast channel.Therefore, existing MBMS business transmitting method makes the transmission performance of MBMS business be starkly lower than the transmission performance of general data on the broadcast channel.

Summary of the invention

In view of this, the invention provides a kind of MBMS business transmitting method, can improve the transmission performance of MBMS business effectively.

In MBMS business transmitting method of the present invention, may further comprise the steps:

According to the strongest principle of channel independence, determine the space channel of each time period MBMS transmission business; On the space channel of each time period correspondence, send the MBMS business datum to receiving terminal.

Preferably, the space channel of described definite each time period MBMS transmission business is:

All that determine number of transmit antennas and transmitting antenna put in order, and definite channel coefficient correlation reduces the factor;

Measure all coefficient correlations between per two width of cloth transmitting antennas of putting in order down, and the coefficient correlation of utilizing determined channel coefficient correlation to reduce the factor and measure, calculate all transmitting antenna average correlation coefficients under putting in order;

Putting in order of average correlation coefficient minimum is defined as the transmitting antenna order of the professional transmission of MBMS, and each transmitting antenna in this transmitting antenna order is defined as successively the transmitting antenna of each time period correspondence.

Preferably,, all transmitting antenna average correlation coefficients under putting in order of described calculating are:

If the coefficient correlation between two adjacent transmitting antennas is ρ, the transmitting antenna average correlation coefficient under the x kind puts in order is ρ _x, then ${\mathrm{\ρ}}_x=\frac{1}{N}(\underset{k=2}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\ρ}}^{|A_k-A_{k-1}|}+\mathrm{\γ}\underset{j=3}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\ρ}}^{|A_j-A_{j-2}|}),$ Wherein N is a number of transmit antennas, and γ reduces the factor for the channel coefficient correlation,

Be the coefficient correlation between k width of cloth transmitting antenna and (k-1) width of cloth transmitting antenna,

It is the coefficient correlation between j width of cloth transmitting antenna and (j-2) width of cloth transmitting antenna.

Preferably, the space channel of described definite each time period MBMS transmission business is: select transmitting antenna at random for each time period in advance, perhaps selected the transmitting antenna of next time period correspondence at random before each time period begins.

Preferably, the space channel of described definite each time period MBMS transmission business is:

Determine transmitting antenna sum and the number of transmit antennas of same time period, from all transmitting antennas, choose, obtain many group emitting antenna combination according to the number of transmit antennas of same time period;

Measure the coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, calculate the average correlation coefficient of each emitting antenna combination, and with the average correlation coefficient less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas;

With the candidate transmitting combination of antennas of average correlation coefficient minimum emitting antenna combination, and be the code channel that every width of cloth transmitting antenna in this emitting antenna combination distributes non-overlapping copies as current slot;

Calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the candidate transmitting combination of antennas of coefficient correlation minimum as the emitting antenna combination of next time period, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period.

Preferably, the space channel of described definite each time period MBMS transmission business is:

Select the transmitting antenna of initial time section;

In time period after the initial time section, measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, calculate the transmitting antenna of current slot correspondence and the channel impulse response coefficient correlation between all the other transmitting antennas, and be the transmitting antenna of next time period the emitting antenna selecting of channel impulse response coefficient correlation minimum.

Preferably, the transmitting antenna of described calculating current slot correspondence and the channel impulse response coefficient correlation between all the other transmitting antennas are:

If the channel impulse response coefficient correlation between the transmitting antenna of current slot correspondence and all the other transmitting antennas is γ _Ij, then ${\mathrm{\γ}}_{\mathrm{ij}}=\frac{E[h_i*h_j]-E\left[h_i\right]*E\left[h_j\right]}{\sqrt{E\left[{h_i}^2\right]-E^2\left[h_i\right]}*\sqrt{E\left[{h_j}^2\right]-E^2\left[h_j\right]}},$ H wherein _iBe the channel impulse response of the transmitting antenna of current slot correspondence, h _jBe the channel impulse response of j width of cloth transmitting antenna, operator E represents to ask for covariance, and 1≤j≤N.

Preferably, the space channel of described definite each time period MBMS transmission business is:

Determine transmitting antenna sum and the number of transmit antennas of same time period, from all transmitting antennas, choose, obtain many group emitting antenna combination according to the number of transmit antennas of same time period;

Measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and calculate the channel impulse response coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination;

According to the channel impulse response coefficient correlation of calculating, calculate the average channel impulse response coefficient correlation of all emitting antenna combination, with average channel impulse response coefficient correlation less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas, with the candidate transmitting combination of antennas of average channel impulse response coefficient correlation minimum emitting antenna combination, and be the code channel that every width of cloth transmitting antenna in this emitting antenna combination distributes non-overlapping copies as current slot;

Calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the candidate transmitting combination of antennas of coefficient correlation minimum as the emitting antenna combination of next time period, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period.

Preferably, describedly send the MBMS business datum to receiving terminal and be:

When current slot finishes, stop the transmitting antenna of current slot correspondence, with next time period as current slot, start corresponding transmitting antenna, as current transmitting antenna, and this current transmitting antenna MBMS transmission business of utilization.

Preferably, describedly send the MBMS business datum to receiving terminal and be:

When current slot finishes, stop the transmitting antenna of current slot correspondence, with next time period as current slot, start corresponding transmitting antenna, as current transmitting antenna, and utilize the corresponding code channel MBMS transmission business of this current transmitting antenna.

Preferably, this method further comprises: be each MBMS traffic assignments priority in advance;

The described corresponding code channel of current transmitting antenna that utilizes in current slot transmits before the described MBMS business, further comprises:

A11. judge described MBMS business on current transmitting antenna corresponding code channel in current slot whether by professional use of the higher MBMS of priority, if, process ends then; Otherwise, carry out the described corresponding code channel of current transmitting antenna that in current slot, utilizes and transmit described MBMS business.

Preferably, before the described steps A 11, further comprise:

Judge whether there is the higher MBMS business of priority that in current slot, to transmit on the current transmitting antenna, if then carry out described steps A 11; Otherwise, carry out the described corresponding code channel of current transmitting antenna that in current slot, utilizes and transmit described MBMS business.

Preferably, before the described transmitting antenna that stops the current slot correspondence, further comprise:

A101. notify described receiving terminal to report received signal code power RSCP, judge whether to exist RSCP, if then upgrade the number of receptivity poor user and execution in step A102 less than the receptivity thresholding that sets in advance; Otherwise, return and carry out this step;

Whether the number of A102. judging the receptivity poor user reaches the saltus step thresholding that sets in advance, if then carry out the described transmitting antenna that stops the current slot correspondence; Otherwise, judge whether to arrive the receptivity measurement period that sets in advance, if arrive, then with the number zero clearing of receptivity poor user, and return and carry out described steps A 101, if no show is then directly returned and carried out described steps A 101.

Preferably, before the described transmitting antenna that stops the current slot correspondence, further comprise:

A201. notify described receiving terminal to report received signal code power RSCP, judge whether to exist RSCP, if then upgrade the number of receptivity poor user and execution in step A202 less than the receptivity thresholding that sets in advance; Otherwise, return and carry out this step;

Whether the number of A202. judging the receptivity poor user reaches the saltus step thresholding that sets in advance, if then carry out the described transmitting antenna that stops the current slot correspondence; Otherwise, judge whether to arrive the receptivity measurement period that sets in advance, if arrive, then with the number zero clearing of receptivity poor user, and return and carry out described steps A 201, if no show is then directly returned and carried out described steps A 201.

Preferably, the space channel of described definite each time period MBMS transmission business is:

The number of antennas that comprises in every group of wave beam is set,, from all transmitting antennas, chooses, obtain a plurality of antenna groupings, and form the transmitting antenna grouping set according to set number of transmit antennas;

Utilize predetermined all weights that beam forming processing is carried out in each the antenna grouping in the antenna grouping set, obtain many group wave beams;

In the mutual compensation principle of the gain of same angle, determine the wave beam order between adjacent two wave beams of foundation, and each wave beam in this wave beam order is defined as successively the wave beam of each time period correspondence.

Preferably, the space channel of described definite each time period MBMS transmission business is:

The number of antennas that comprises in every group of wave beam is set,, from all transmitting antennas, chooses, obtain a plurality of antenna groupings, and form the transmitting antenna grouping set according to set number of transmit antennas;

Utilize predetermined all weights that beam forming processing is carried out in each the antenna grouping in the antenna grouping set, obtain many group wave beams;

According to the wave beam number of predetermined same time period, select wave beam to form the beam combination of current slot, each wave beam in this beam combination compensates mutually in the gain of same angle, and is the code channel of each the beam allocation non-overlapping copies in this beam combination;

The wave beam of selecting to compensate mutually in the gain of same angle with the beam combination of current slot is formed the beam combination of next time period and is the code channel of each the beam allocation non-overlapping copies in this beam combination.

Preferably, describedly send the MBMS business datum to receiving terminal and be:

When current slot finishes, stop the wave beam of current slot correspondence, with next time period as current slot, start corresponding wave beam, as current wave beam, and utilize deserve before the corresponding code channel MBMS transmission business of wave beam.

Preferably, this method further comprises: be each MBMS traffic assignments priority in advance;

Before the described MBMS transmission business, further comprise:

A21. judge described MBMS business the corresponding code channel of current wave beam in current slot whether by professional use of the higher MBMS of priority, if, process ends then; Otherwise, carry out the corresponding code channel MBMS transmission business that preceding wave beam is deserved in described utilization.

Preferably, before the described steps A 21, further comprise:

Judge whether there is the higher MBMS business of priority that in current slot, to transmit in the current wave beam, if then carry out described steps A 21; Otherwise, carry out the described code channel of current wave beam and described correspondence that in current slot, utilizes and transmit described MBMS business.

Preferably, before the described wave beam that stops the current slot correspondence, further comprise:

A301. notify described receiving terminal to report received signal code power RSCP, judge whether to exist RSCP, if then upgrade the number of receptivity poor user and execution in step A302 less than the receptivity thresholding that sets in advance; Otherwise, return and carry out this step;

Whether the number of A302. judging the receptivity poor user reaches the saltus step thresholding that sets in advance, if then carry out the described transmitting antenna that stops the current slot correspondence; Otherwise, judge whether to arrive the receptivity measurement period that sets in advance, if arrive, then with the number zero clearing of receptivity poor user, and return and carry out described steps A 201, if no show is then directly returned and carried out described steps A 301.

Preferably, the described time period is time slot, subframe or radio frames.

The present invention also provides a kind of MBMS of being used for the network equipment of professional transmission, can improve the transmission performance of MBMS business effectively.

In the network equipment of the present invention, comprising: MBMS scheduler module, memory module and communication module, wherein,

Described MBMS scheduler module is according to the strongest principle of channel independence, determine the space channel of each time period MBMS transmission business, determined spatial channel information is sent to memory module, when each time period arrives, from memory module, read the space channel of current slot correspondence, and the spatial channel information that reads is sent to communication module;

Described memory module receives from the spatial channel information of MBMS scheduler module and preserves, and preserves the MBMS business datum that needs transmission;

Described communication module receives the spatial channel information of the current slot correspondence of MBMS scheduler module transmission, from memory module, read the MBMS business datum, and the MBMS business datum that reads is carried on the space channel of current slot correspondence, send to receiving terminal.

Preferably, described MBMS scheduler module comprises: measure submodule, control submodule and timer, wherein,

Described measurement submodule determine number of transmit antennas and transmitting antenna all put in order, measure all coefficient correlations between per two width of cloth transmitting antennas of putting in order down, and the coefficient correlation that obtains sent to the control submodule;

Described control submodule determines that the channel coefficient correlation reduces the factor, reception comes from the coefficient correlation between per two width of cloth transmitting antennas of measuring submodule, the coefficient correlation that reduces the factor and receive according to determined coefficient correlation, calculate all transmitting antenna average correlation coefficients under putting in order, putting in order of average correlation coefficient minimum is defined as the professional transmitting antenna order of transmitting of MBMS, and determined transmitting antenna is sent to memory module in proper order; Under the indication of timer, from memory module, read the transmitting antenna information and the MBMS business datum of current slot correspondence, the MBMS business datum that reads is sent to communication module, the notification communication module is carried out the transmitting antenna saltus step;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Preferably, described MBMS scheduler module comprises: measure submodule, control submodule and timer, wherein,

Described measurement submodule is determined transmitting antenna sum and the number of transmit antennas of same time period, form many group emitting antenna combination according to the number of transmit antennas of same time period, measure the coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, and the coefficient correlation that obtains is sent to the control submodule;

Described control submodule receives the coefficient correlation that comes between per two width of cloth transmitting antennas of measuring submodule, calculate the average correlation coefficient of all emitting antenna combination, with the candidate transmitting combination of antennas of average correlation coefficient minimum emitting antenna combination as current slot, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in this emitting antenna combination, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the emitting antenna combination of the candidate transmitting combination of antennas of coefficient correlation minimum as next time period, be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period, and emitting antenna combination and the corresponding code channel information of determined each time period sent to memory module; Under the indication of timer, from memory module, read the emitting antenna combination information of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS business datum that reads is sent to communication module, and the emitting antenna combination of current slot correspondence is started working and the emitting antenna combination of a last time period correspondence quits work in the notification communication module;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Preferably, described MBMS scheduler module comprises measures submodule, control submodule and timer, wherein,

Described measurement submodule is measured by up channel, estimates the channel impulse response on the every width of cloth transmitting antenna of current slot, and the estimated channel impulse response that goes out is sent to the control submodule;

Described control submodule receives from the channel impulse response of measuring submodule, calculate the transmitting antenna of current slot correspondence and the channel impulse response coefficient correlation between all the other transmitting antennas, with the emitting antenna selecting of channel impulse response coefficient correlation minimum is the transmitting antenna of next time period correspondence, and the transmitting antenna information of next time period correspondence is sent to memory module; Under the indication of timer, from memory module, read the transmitting antenna information and the MBMS business datum of current slot correspondence, the MBMS data that read are sent to communication module, and the notification communication module is carried out the transmitting antenna saltus step;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Preferably, described MBMS scheduler module comprises measures submodule, control submodule and timer, wherein,

Described measurement submodule is determined transmitting antenna sum and the number of transmit antennas of same time period, form many group emitting antenna combination according to the number of transmit antennas of same time period, measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and the estimated channel impulse response that goes out is sent to the control submodule;

Described control submodule receives from the channel impulse response of measuring submodule, calculate the channel impulse response coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, calculate the average channel impulse response coefficient correlation of all emitting antenna combination, with average channel impulse response coefficient correlation less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas, with the candidate transmitting combination of antennas of average channel impulse response coefficient correlation minimum emitting antenna combination as current slot, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in this emitting antenna combination, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the emitting antenna combination of the candidate transmitting combination of antennas of coefficient correlation minimum as next time period, be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period, and determined emitting antenna combination information and corresponding code channel information are sent to memory module; And under the indication of timer, from memory module, read the emitting antenna combination information of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS data that read are sent to communication module, and the emitting antenna combination of current slot correspondence is started working and the emitting antenna combination of a last time period correspondence quits work in the notification communication module;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Preferably, described communication module comprises at least two width of cloth transmitting antennas, and described transmitting antenna conjunction measuring submodule carries out the measurement of coefficient correlation between transmitting antenna; Start working under the notice of described control submodule, reception comes from the MBMS business datum of controlling submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

Preferably, described communication module comprises at least two width of cloth transmitting antennas, and described transmitting antenna conjunction measuring submodule carries out up channel and measures; Start working under the notice of described control submodule, reception comes from the MBMS business datum of controlling submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

Preferably, described MBMS scheduler module comprises: control submodule and timer, wherein,

Described control submodule reads many group wave beam information from memory module, determine the gain of every group of wave beam on all angles by emulation, in the mutual compensation principle of the gain of same angle, determine the wave beam order according to adjacent two wave beams, and determined wave beam is sent to memory module in proper order; Under the indication of timer, from described memory module, read the wave beam information and the MBMS business datum of current slot correspondence, the MBMS data that read are sent to communication module, and the notification communication module is carried out the wave beam switching;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Preferably, described memory module is further preserved transmitting antenna information and the corresponding weights that comprise in the every group of wave beam that sets in advance;

Described communication module comprises: wave beam forms submodule and at least two width of cloth transmitting antennas, wherein,

Described wave beam forms submodule and read transmitting antenna information and the corresponding weights that comprise in every group of wave beam from memory module, obtains the transmitting antenna grouping set according to the transmitting antenna information that reads; The weights that utilization reads carry out beam forming processing to each the antenna grouping in the antenna grouping set, obtain many group wave beams, and the wave beam information that obtains is sent to memory module; Reception comes from the MBMS business datum of controlling submodule, notice according to the control submodule, form the wave beam of current slot correspondence, and with the MBMS business datum that receives send to form transmitting antenna in the wave beam, perhaps, the transmitting antenna of controlling under the notice of control submodule in the corresponding wave beam of a time period quits work;

Described transmitting antenna receives and comes from the MBMS business datum that described wave beam forms submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the control of described wave beam formation submodule.

Preferably, described MBMS scheduler module comprises: control submodule and timer, wherein,

Described control submodule reads many group wave beam information and the wave beam number of same time period from memory module, determine of the gain of each wave beam by emulation in same angle, according to the gain principle of complementarity, select the beam combination of current slot, code channel for each the beam allocation non-overlapping copies in this beam combination, and the beam combination of selection and current slot is formed the beam combination of next time period and is the code channel of each the beam allocation non-overlapping copies in this beam combination at the wave beam that the gain of same angle compensates mutually, and determined beam combination information and corresponding code channel information are sent to memory module; And under the indication of timer, from memory module, read the wave beam information combination of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS data that read are sent to communication module, and in the notification communication module transmitting antenna in the corresponding beam combination of current slot start working and corresponding beam combination of a last time period in transmitting antenna quit work.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Preferably, described memory module is further preserved the wave beam number of the transmitting antenna information, corresponding weights and the same time period that set in advance;

Described communication module comprises: wave beam forms submodule and at least two width of cloth transmitting antennas, wherein,

Described wave beam forms submodule and read transmitting antenna information and the corresponding weights that comprise in every group of wave beam from memory module, obtains the transmitting antenna grouping set according to the transmitting antenna information that reads; The weights that utilization reads carry out beam forming processing to each the antenna grouping in the antenna grouping set, obtain many group wave beams, and the wave beam information that obtains is sent to memory module; Reception comes from the MBMS business datum of controlling submodule, according to the notice of control submodule, forms the wave beam of current slot correspondence, and the MBMS business datum that receives and corresponding code channel information are sent to the transmitting antenna in the wave beam of forming; Perhaps, the transmitting antenna of controlling under the notice of control submodule in the corresponding wave beam of a time period quits work;

Described transmitting antenna is started working under the control of wave beam formation submodule, receives to come from the MBMS business datum that wave beam forms submodule, utilizes corresponding code channel that the MBMS business datum that receives is sent to receiving terminal; Perhaps, under the notice of wave beam formation submodule, quit work.

Preferably, the described network equipment is the base station.

The present invention provides a kind of MBMS of being used for professional system for transmitting again, can improve the transmission performance of MBMS business effectively.

In system of the present invention, comprising: base station and user equipment (UE), wherein,

The space channel of each time period MBMS transmission business is determined according to the strongest principle of channel independence in described base station, and on the space channel of each time period correspondence, sends the MBMS business datum to receiving terminal;

Described UE receives the MBMS business datum that comes from the base station.

Preferably, described system further comprises: radio network controller, be used to preserve the UE receptivity thresholding and the saltus step thresholding that set in advance, before each time period arrives, notify described UE to report received signal code power RSCP and reception to come from the RSCP of these UE by described base station, according to RSCP that receives and the UE receptivity thresholding preserved, determine the receptivity situation of UE, when the UE number that is in the relatively poor situation of receptivity reached the saltus step thresholding of being preserved, the space channel of described MBMS business was transmitted in the informing base station adjustment;

Described base station further reports RSCP at the indication of the described RNC described UE that sends a notice, reception comes from the RSCP of these UE, the RSCP that receives is sent to RNC, and under the notice of RNC,, in next time period, change space channel according to the space channel of determined each time period MBMS transmission business;

Described UE receive come from the base station about reporting the notice of RSCP, self RSCP is measured, and the RSCP that is obtained is sent to described base station.

Use the present invention, can improve the transmission performance of MBMS business effectively.Particularly, the present invention has following beneficial effect:

1. among the present invention the MBMS service distribution is transmitted having on the space channel of different fading characteristics, because it is lower that the probability of big fading loss appears in these space channels simultaneously, therefore the receiving terminal that receives the MBMS business can obtain better diversity gain, thereby obtains the higher MBMS signal of signal to noise ratio.Compare with existing MBMS transmission method, the transmission performance of MBMS business improves greatly in the technique scheme.

2. under MBMS service transmission performance condition with higher, the user far away with base station distance also can receive the higher MBMS signal of quality, i.e. the present invention can also increase the coverage of MBMS sub-district effectively.

3. the present invention can adopt the transmitting antenna that pre-determines each time period correspondence or the mode of wave beam, and the MBMS business datum is distributed on the space channel with different fading characteristics.Under this mode, network side only needs very little space to preserve the order information of transmitting antenna or wave beam, and consuming time less when carrying out the saltus step of space channel, can not influence the overall transfer time of MBMS business.

4. the present invention can also adopt and determine the transmitting antenna that will be used or the mode of wave beam time period before each arrives, and determines the space channel of MBMS.In this manner, network side can be considered the time variation of channel fully, thus the channel adjustment result who is more tallied with the actual situation.The raising of MBMS transmission performance is more obvious under this mode.

5. the present invention also utilizes several transmitting antennas or a plurality of wave beam to carry out the transmission of MBMS business datum simultaneously in the section at one time, and the code channel of the corresponding non-overlapping copies of each transmitting antenna in the same time period or wave beam, thereby further the difference of expansion space channel fading characteristic obtains higher MBMS transmission performance.

6. in one embodiment of the invention, with the receptivity of receiving terminal as one of Consideration of determining space channel.When network side determines that according to the feedback of receiving terminal needs carry out the saltus step of space channel, just change the transmitting antenna or the wave beam of MBMS transmission business in next time period.Not only can guarantee to obtain MBMS transmission performance preferably like this, but also can reduce the channel adjustment number of times effectively, simplify the operation of network side, save resource.What is more important, this mode can also be avoided causing the unexpected situation about reducing of MBMS transmission performance because of existing between channel adjustment and the receiving terminal actual reception performance than big-difference, make that the MBMS transmission mechanism among the present invention is more intelligent.

Description of drawings

To make clearer above-mentioned and other feature and advantage of the present invention of those of ordinary skill in the art by describe exemplary embodiment of the present invention in detail with reference to accompanying drawing below, in the accompanying drawing:

Fig. 1 is the flow chart of MBMS data transmission method in the embodiment of the invention 1;

Fig. 2 is the structural representation of antenna system;

Fig. 3 is the flow chart of MBMS data transmission method in the embodiment of the invention 2;

The schematic diagram that Fig. 4 puts in order for transmitting antenna in the embodiment of the invention 2;

Fig. 5 be in the embodiment of the invention 2 with subframe the schematic diagram of the multiple MBMS business of transmission on several antennas during as bound-time unit;

Fig. 6 is the method flow diagram of the professional transmission of MBMS in the embodiment of the invention 3;

Fig. 7 is the code channel schematic diagram of an interior a kind of MBMS business of time period correspondence on eight width of cloth transmitting antennas in the embodiment of the invention 3;

Fig. 8 be in the embodiment of the invention 3 on each width of cloth transmitting antenna method flow diagram of MBMS transmission business;

Fig. 9 is the flow chart of MBMS business transmitting method in the embodiment of the invention 4;

Figure 10 is the method flow diagram of the professional transmission of MBMS in the embodiment of the invention 5;

Figure 11 is the method flow diagram of the professional transmission of MBMS in the embodiment of the invention 6;

The schematic diagram of two groups of wave beams that Figure 12 compensates mutually for the gain of same angle in the embodiment of the invention 6;

Figure 13 be in the embodiment of the invention 6 with subframe the schematic diagrames of the multiple MBMS business of transmission on many group wave beams during as the time period;

Figure 14 is the method flow diagram of the professional transmission of MBMS in the embodiment of the invention 7;

Figure 15 is the code channel schematic diagram of a kind of MBMS business correspondence on four groups of wave beams in the embodiment of the invention 7;

Figure 16 is a method flow diagram of organizing MBMS transmission business on wave beam in the embodiment of the invention 7 at each;

Figure 17 is the method flow diagram of MBMS transmission in the embodiment of the invention 8;

Figure 18 is the structural representation of MBMS service transmission system in the embodiment of the invention;

Figure 19 is for being used for the structural representation of the professional network equipment that transmits of MBMS in the embodiment of the invention;

Figure 20 is applied to the MBMS scheduler module of technical scheme in the embodiment of the invention 2 and the structural representation of communication module;

Figure 21 is applied to the MBMS scheduler module of technical scheme in the embodiment of the invention 4 and the structural representation of communication module.

Embodiment

For making purpose of the present invention, technical scheme clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.

The present invention is a kind of transmission method of MBMS business, its basic thought is: the MBMS business datum is dispersed on the space channel with different fading characteristics transmits, so that receiving terminal obtains space diversity gain, improve the signal to noise ratio of the professional transmission of MBMS, thereby improve the transmission performance of MBMS business.

Below by five embodiment, technical scheme of the present invention is described.

Embodiment 1

Fig. 1 shows the flow chart of MBMS business transmitting method in the present embodiment.Referring to Fig. 1, this method comprises: in step 101, according to the strongest principle of channel independence, determine the space channel of each time period MBMS transmission business; In step 102, on the space channel of each time period correspondence, send the MBMS business datum to receiving terminal.

Because the space channel of MBMS transmission business has very strong independence between each time period, i.e. correlation minimum between these space channels, so the fading characteristic that they had is also inequality.When the MBMS data were transmitted on fading characteristic space channel inequality, all space channels all occurred lower than the probability of lossy, and then receiving terminal can obtain to be used for to the anti fading diversity gain, thereby obtained the higher MBMS signal of signal to noise ratio.The time period here can be time slot, subframe or radio frames etc.

Embodiment 2

Present embodiment as applied environment, by choosing the transmitting antenna order of average correlation minimum, is determined the space channel of each time period with antenna system.

Fig. 2 shows the structural representation of antenna system.Referring to Fig. 2, in antenna system, for down direction, the transmitting terminal of network side has several transmitting antennas, and for example: antenna A1 is to antenna A8, and receiving terminal only has an amplitude receiver antenna; And, all form a space channel between every width of cloth transmitting antenna and the reception antenna.

Fig. 3 shows the method flow diagram of the professional transmission of MBMS in the present embodiment.Referring to Fig. 3, this method comprises:

In step 301～302, all that determine transmitting antenna sum and transmitting antenna put in order, and definite channel coefficient correlation reduces the factor.

Suppose that transmitting terminal has N width of cloth transmitting antenna: A ₁, A ₂..., A _N, and the equidistant linear array of all transmitting antennas.All of transmitting antenna put in order and comprise at this moment: A ₁, A ₂..., A _NA ₂, A ₁..., A _N, A _N, A _N-1..., A ₁, total P _N ^NKind.

For wireless transmission channel, As time goes on channel conditions can change, and promptly channel has time variation, and this time variation can produce bigger influence to correlation between channels between two time periods.Usually have the correlation time threshold that is used to represent correlation between two time period upper signal channels, and the speed that the size of correlation time threshold becomes when taking place with channel is relevant, during the channel generation change fast more, the correlation time threshold is more little.In actual applications, when the distance of two time periods during greater than this correlation time threshold, can think that the channel on this two time periods is separate, promptly correlation is very little; When the distance of two time periods during less than this correlation time threshold, the channel on this two time periods has bigger correlation; And when the distance of two time periods equaled this correlation time threshold, the correlation of the interchannel on this two time periods was less, but the correlation of this moment can not be left in the basket.In order to draw all average correlation coefficients under putting in order in the subsequent step comparatively exactly, then when the distance of two time periods equals this correlation thresholding, introduce the channel coefficient correlation and reduce factor gamma, wherein 0≤γ≤1 so.

In step 303～304, measure all coefficient correlations between per two width of cloth transmitting antennas of putting in order down, and the coefficient correlation of utilizing determined channel coefficient correlation to reduce the factor and measure, calculate all transmitting antenna average correlation coefficients under putting in order.

Here, suppose that the coefficient correlation between two adjacent transmitting antennas is ρ, and the correlation time threshold equals two time periods, the transmitting antenna average correlation coefficient under then the x kind puts in order is ρ _x, so ${\mathrm{\ρ}}_x=\frac{1}{N}(\underset{k=2}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\ρ}}^{|A_k-A_{k-1}|}+\mathrm{\γ}\underset{j=3}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\ρ}}^{|A_j-A_{j-2}|}),$ Wherein N is the transmitting antenna sum, and γ reduces the factor for the channel coefficient correlation,

Be the coefficient correlation between k width of cloth transmitting antenna and (k-1) width of cloth transmitting antenna,

It is the coefficient correlation between j width of cloth transmitting antenna and (j-2) width of cloth transmitting antenna.

In step 305, putting in order of average correlation coefficient minimum is defined as the transmitting antenna order of the professional transmission of MBMS.

When transmitting antenna puts in order corresponding average correlation coefficient hour, show that according to this sequential delivery MBMS the space channel on each time period has the strongest independence when professional, and the receiving terminal diversity gain maximum that can obtain.In addition, after having determined the transmitting antenna order of MBMS transmission business, in long period of time, all carry out transmission in proper order in the present embodiment according to this, and the non real-time adjustment.Like this, network side only need utilize very little space to preserve determined transmitting antenna order information, and consuming time less when carrying out antenna hopping, can not influence the overall transfer time of MBMS business.

In step 306, be bound-time unit with the time period, send the MBMS data in proper order according to determined transmitting antenna.

When the time period in the present embodiment was subframe, every through a subframe, network side carried out the saltus step of a transmitting antenna.For example, after 305, determined the transmitting antenna order shown in Fig. 4, i.e. transmitting antenna A through above-mentioned step 301 ₁→ A ₈→ A ₄→ A ₇→ A ₂→ A ₅→ A ₃→ A ₆→ A ₁, the use duration of every width of cloth transmitting antenna is a subframe, the MBMS business datum of whenever finishing a subframe transmits, and all stops current transmitting antenna, and the transmitting antenna that starts next subframe correspondence carries out transfer of data.Certainly, can be bound-time unit also in this step with the time slot shorter than subframe, send the MBMS data in proper order according to determined transmitting antenna.

In order to make full use of several transmitting antennas in the antenna system, can on different transmitting antennas, send different MBMS business simultaneously.Under the situation that has multiple MBMS business, different business is the interior corresponding identical transmitting antenna of section at one time, in order to solve the resource conflict problem of this moment, can be MBMS traffic assignments transmission priority in advance in the present embodiment, the higher MBMS business of priority has the priority that takies transmission channel.So every through a bound-time unit, judge and whether have the higher MBMS business of priority that in current slot, to transmit on the current transmitting antenna, if, then wait for a bound-time unit, next transmitting antenna as current transmitting antenna, and is returned and carries out above-mentioned decision operation; Otherwise, in current slot, utilize current transmitting antenna MBMS transmission business, next transmitting antenna as current transmitting antenna, and is returned and carries out above-mentioned decision operation.

The schematic diagram of the multiple MBMS business of transmission on several antennas when Fig. 5 shows with subframe as bound-time unit.In Fig. 5, include four kinds of MBMS professional S1, S2, S3 and S4 altogether.From the angle of MBMS business, the transmission channel of S1 is arranged to: subframe 1-transmitting antenna A1, and subframe 2-transmitting antenna A8 ..., subframe 7-transmitting antenna A1; From the angle of subframe, be example with subframe 1, transmitting antenna A1 goes up transmission S1, and transmitting antenna A3 goes up transmission S2, and transmitting antenna A5 goes up transmission S4, and transmitting antenna A7 goes up transmission S3.As seen the different MBMS service distribution of synchronization is transmitted to different antennas.Like this, because the MBMS signal that is transmitted on several transmitting antennas of synchronization is different, therefore, the transmitting power peak-to-average force ratio (PAR) on every width of cloth transmitting antenna is lower.

Embodiment 3

In code division multiple access (CDMA) system, also utilize 16 code channels to carry out transfer of data, so for a kind of MBMS is professional, present embodiment can be at one time selected to have several transmitting antennas of the strongest independence in the section and is worked simultaneously, each width of cloth antenna is corresponding to the code channel of non-overlapping copies, and makes two groups of transmitting antennas of adjacent time period have minimum correlation.Fig. 6 shows the method flow diagram of the professional transmission of MBMS in the present embodiment.Referring to Fig. 6, this method comprises:

In step 601, determine transmitting antenna sum and the number of transmit antennas of same time period, choose from all transmitting antennas according to the number of transmit antennas of same time period, obtain many group emitting antenna combination.

Suppose that transmitting terminal has equidistant linearly aligned N width of cloth transmitting antenna: A ₁, A ₂..., A _N, and the transmitting antenna data of same time period are K, wherein K≤N.So total C _N ^KIndividual emitting antenna combination.

In step 602～603, measure the coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, calculate the average correlation coefficient of each emitting antenna combination, and with the average correlation coefficient less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas; As current slot, with the candidate transmitting combination of antennas of the average correlation coefficient minimum emitting antenna combination as current slot, and is the code channel that every width of cloth transmitting antenna in this emitting antenna combination distributes non-overlapping copies with the initial time section.

Suppose that the coefficient correlation between two adjacent transmitting antennas is ρ, then the transmitting antenna average correlation coefficient in x emitting antenna combination is ρ _x, so ${\mathrm{\ρ}}_x=\frac{1}{N}\left(\underset{k=2}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\ρ}}^{|A_k-A_{k-1}|}\right),$ Wherein N is the transmitting antenna sum, It is the coefficient correlation between k width of cloth transmitting antenna and (k-1) width of cloth transmitting antenna.

The purpose that the correlation thresholding is set here is, the combination that the transmitting antenna that correlation is bigger is formed forecloses, in order to avoid selected in subsequent step, influences the transmission performance of MBMS.

After the transmitting antenna set of having determined the initial time section, 16 code channels are distributed to transmitting antenna in this transmitting antenna set, and different transmit antennas has different code channels.For example, transmitting antenna A ₁Corresponding the 1st to 4 code channel, transmitting antenna A ₂Corresponding the 5th to 8 code channel etc.

In step 604, judge whether current slot is the most last time period, if then execution in step 607; Otherwise, execution in step 605.

The current slot here be meant before the MBMS transfer of data, carry out the space newly arrive distribute at time period, but not on the time dimension just in the elapsed time section; And the most last time period is meant last time period of a kind of MBMS business of transmission.

In step 605, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the candidate transmitting combination of antennas of coefficient correlation minimum as the emitting antenna combination of next time period, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period.

In step 606, with next time period as current slot, return execution in step 604.

In step 607, when needs carry out transfer of data, be bound-time unit, according to the emitting antenna combination transmission MBMS data of determined each time period with the time period.

After the emitting antenna combination of having determined all time periods and code channel,, then carry out the transmission operation of MBMS data in this step if arrived the time point that carry out transfer of data.And in the transmission course of data, the code channel that the transmitting antenna of working simultaneously in the same time period is corresponding different.

So far, finish the flow process of the professional transmission of MBMS in the present embodiment.

Fig. 7 shows the code channel schematic diagram of a kind of MBMS business correspondence on eight width of cloth transmitting antennas in the time period.Referring to Fig. 7, for the professional S1 of MBMS, transmitting antenna A1 the corresponding the 1st is to m ₁Individual code channel, transmitting antenna A6 correspondence (m ₁+ 1) to m ₂Individual code channel, or the like.At this moment, because the employed code channel difference of each transmitting antenna in the same time period, it is the space channel difference of each code channel correspondence, then the fading characteristic of different spaces channel also can be brought space diversity gain, therefore the signal to noise ratio of MBMS signal transmission further improves, thereby the transmission performance of MBMS business also makes moderate progress.

Certainly, also can when distributing the code channel of every width of cloth transmitting antenna correspondence, take all factors into consideration multiple MBMS business.In other words, at one time on the section, the professional corresponding different transmitting antenna of different MBMS and the code channel of corresponding non-overlapping copies.Fig. 8 shows in the present embodiment method flow diagram of MBMS transmission business on each width of cloth transmitting antenna.Referring to Fig. 8, MBMS transmission business on each width of cloth transmitting antenna as follows here, to solve resource contention:

In step 801, judge whether there is the higher MBMS business of priority that in current slot, to transmit on the current transmitting antenna, if then execution in step 802; Otherwise, execution in step 803.

In step 802, judge whether the corresponding code channel of MBMS business on the current transmitting antenna is used by the higher MBMS business of priority in current slot, if then execution in step 805; Otherwise, execution in step 803.

In step 803, in current slot, utilize the corresponding code channel MBMS transmission business of current transmitting antenna.

In step 804, judge whether end of transmission of MBMS business, if, process ends then; Otherwise, execution in step 805.

In step 805, when current slot finishes, next transmitting antenna as current transmitting antenna, and is returned execution in step 801.

So far, finish this MBMS transfer process.

By above-mentioned steps 801 to 805 as seen, the professional corresponding different transmitting antenna of different MBMS and the code channel of corresponding non-overlapping copies can further enlarge the difference of channel fading like this, thereby improve the transmission performance of MBMS.

Embodiment 4

Present embodiment is example with the antenna system, and by choosing the transmitting antenna order of channel impulse response correlation minimum, determines the space channel of each time period.Differently in present embodiment and embodiment 2 and 3 be, present embodiment was determined the transmitting antenna that will be used before next time period arrives, but not the integral body use of disposable definite transmitting antenna order.

Fig. 9 shows the flow chart of MBMS transmission method in the present embodiment.Referring to Fig. 9, this method comprises:

In step 901, select the transmitting antenna of initial time section, and utilize this antenna in initial time section MBMS transmission business.In this step, the initial time section is meant first time period of a MBMS business of transmission.For example first time slot, first subframe or first radio frames.When selecting the transmitting antenna of initial time section, can in all transmitting antennas, select arbitrarily.

In step 902～903, measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and calculate the channel impulse response coefficient correlation between current transmitting antenna and all the other transmitting antennas.

In tdd systems,, can obtain the channel impulse response of every width of cloth transmitting antenna on the down direction by up channel is measured so because the up-downgoing channel has good symmetry.Suppose to co-exist in N width of cloth transmitting antenna, every width of cloth transmitting antenna at the channel impulse response of current slot is: h ₁, h ₂..., h _N, and the employed transmitting antenna of current slot is an i width of cloth transmitting antenna.

Can calculate the channel impulse response coefficient correlation γ between the employed transmitting antenna of current slot and each width of cloth transmitting antenna according to the following equation _Ij:

${\mathrm{\γ}}_{\mathrm{ij}}=\frac{E[h_i*h_j]-E\left[h_i\right]*E\left[h_j\right]}{\sqrt{E\left[{h_i}^2\right]-E^2\left[h_i\right]}*\sqrt{E\left[{h_j}^2\right]-E^2\left[h_j\right]}},$ Wherein operator E represents to ask for average, and 1≤j≤N.

In step 904～905, with the emitting antenna selecting of channel impulse response coefficient correlation minimum is the transmitting antenna of next time period, when current slot finishes, with the transmitting antenna of next time period as current transmitting antenna, utilize this transmitting antenna MBMS transmission business, and return execution in step 902.

When between the transmitting antenna of current slot and the transmitting antenna of next time period, having minimum channel impulse response coefficient correlation, the space channel that shows this two width of cloth transmitting antenna correspondence has the strongest independence, it is the difference maximum of fading characteristic, therefore, when sending the MBMS data, can obtain higher signal to noise ratio, thereby obtain higher MBMS transmission performance.

This step can be operated according to the mode identical with step 306 among the embodiment 2 when utilizing determined transmitting antenna MBMS transmission professional.

So far, finish the professional transfer process of MBMS in the present embodiment.

In the present embodiment, calculate the transmitting antenna and the channel impulse response correlation between each width of cloth transmitting antenna of current slot, and be the transmitting antenna that is used in next time period the emitting antenna selecting of channel impulse response correlation minimum.As seen, regularly adjust the order of transmitting antenna in the present embodiment according to the channel impulse response of each width of cloth antenna correspondence, therefore can consider the influence of external environment to a great extent to the channel fading characteristic, thereby assurance MBMS business can be transmitted with higher signal to noise ratio, and then guarantees the transmission performance of MBMS business.

Embodiment 5

In the present embodiment channel impulse response correlation among the embodiment 4 is combined with embodiment 3, adopt several transmitting antennas to come MBMS transmission business simultaneously at one time in the section.Figure 10 shows the flow chart of MBMS transmission method in the present embodiment.Referring to Figure 10, this method comprises:

In step 1001, determine transmitting antenna sum and the number of transmit antennas of same time period, choose from all transmitting antennas according to the number of transmit antennas of same time period, obtain many group emitting antenna combination.

In step 1002, measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and calculate the channel impulse response coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination.

Can come calculating channel impulse response coefficient correlation according to the mode of step 903 among the embodiment 4 in this step.

In step 1003～1004, according to the channel impulse response coefficient correlation of calculating, calculate the average channel impulse response coefficient correlation of all emitting antenna combination, with average channel impulse response coefficient correlation less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas, with the candidate transmitting combination of antennas of average channel impulse response coefficient correlation minimum emitting antenna combination, and be the code channel that every width of cloth transmitting antenna in this emitting antenna combination distributes non-overlapping copies as current slot.

In step 1005, utilize the code channel that is distributed, MBMS transmission business on all transmitting antennas in the emitting antenna combination of current slot.

In step 1006, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the candidate transmitting combination of antennas of coefficient correlation minimum as the emitting antenna combination of next time period, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period.

In step 1007, when current slot finishes,, and return execution in step 1005 with the emitting antenna combination of next time period emitting antenna combination as current slot.

So far, finish the flow process of the professional transmission of MBMS in the present embodiment.

The above embodiments 2,3,4 and 5 all improve the MBMS performance in the mode of antenna hopping, certainly, because the channel fading characteristic on the different transmit antennas can be not identical, therefore selection mode determines that the order of transmitting antenna also can make receiving terminal obtain diversity gain at random, thereby improves the MBMS transmission performance.Particularly, can disposablely select the interior transmitting antenna order of All Time section of the professional transmission of a kind of MBMS at random, also can when current slot finishes, select the transmitting antenna of next time period at random.

Embodiment 6

In antenna system, network side activates several transmitting antennas simultaneously, spatially produce by the formed directional beam that transmits, and make antenna main beam aim at subscriber signal arrival direction (DOA), secondary lobe or zero falls into aims at the interference signal arrival direction, thereby reaches the purpose of efficiently utilizing mobile subscriber's signal and eliminating or suppress interference signal.Present embodiment can pass through saltus step between the different wave beam of channel fading characteristic, promptly changes the launching beam in next time period, makes receiving terminal obtain diversity gain, thereby improves the transmission performance of MBMS business.

Figure 11 shows the method flow diagram of the professional transmission of MBMS in the present embodiment.Referring to Figure 11, this method comprises:

In step 1101～1102, the number of antennas that comprises in every group of wave beam is set, according to set number of transmit antennas, from all transmitting antennas, choose, obtain a plurality of antenna groupings, and form the transmitting antenna grouping set.

Suppose that the number of antennas that comprises in every group of wave beam of network side is set to k, total N width of cloth transmitting antenna, and k≤N.When transmitting antenna was chosen, each free of turn was with a different k width of cloth transmission antenna group unifications antenna grouping, and the antenna grouping number that obtains so is $M=C_N^k.$ Then, again antenna grouping set B is formed in all antenna groupings together, and the corresponding antenna grouping of each element in should gathering.

For example: total N=4 width of cloth transmitting antenna A ₁, A ₂, A ₃And A ₄, comprise k=3 width of cloth transmitting antenna in every group of wave beam, obtain so $M={\mathrm{<figure-callout\; id="4"\; label="C"\; filenames="A20071012359600401.png"\; state="\{\{state\}\}">C</figure-callout>}}_4^3=4$ Individual antenna grouping, i.e. { A ₁, A ₂, A ₃, { A ₁, A ₂, A ₄, { A ₁, A ₃, A ₄, { A ₂, A ₃, A ₄, and do not have sequencing between each transmitting antenna in each antenna grouping.Antenna grouping set so $B=\left\{\begin{array}{ccc}{A}_1& A_2& A_3\\ A_1& A_2& A_4\\ A_1& A_3& A_4\\ A_2& A_3& {\mathrm{<figure-callout\; id="4"\; label="A"\; filenames="A20071012359600401.png"\; state="\{\{state\}\}">A</figure-callout>}}_4\end{array}\right\},$ Wherein every row is represented an antenna grouping.

In step 1103, utilize predetermined weights that beam forming processing is carried out in each the antenna grouping in the antenna grouping set, obtain many group wave beams.

For can be in antenna system application of beam figuration technology, present embodiment according to the attribute of antenna system in advance for transmitting antenna is provided with corresponding weights, for example total W group weights.Utilize all weights to multiply by the amplitude and the phase place of transmitting antenna in the grouping of each antenna in this step, to realize beam forming processing.After finishing beam forming processing, obtain M * W altogether and organize wave beam.

Be example still, suppose to have set in advance W=2 group weights W with N=4, k=3 ₁And W ₂, through after the beam forming processing, obtain 8 groups of wave beams altogether so, comprising: B1=W ₁* { A ₁, A ₂, A ₃, B2=W ₁* { A ₁, A ₂, A ₄, B3=W ₁* { A ₁, A ₃, W ₁A ₄, B4=W ₁* { A ₂, A ₃, A ₄, B5=W ₂* { A ₁, A ₂, A ₃, B6=W ₂* { A ₁, A ₂, A ₄, B7=W ₂* { A ₁, A ₃, A ₄, B8=W ₂* { A ₂, A ₃, A ₄.

In step 1104, in the mutual compensation principle of the gain of same angle, determine the wave beam order between adjacent two wave beams of foundation.

In this step, at first determine the power pattern (pattern) of every group of wave beam in circumference, obtain the gain on all angles by emulation; Then, adopt the mode of selecting at random to determine the wave beam of initial time section correspondence, as current wave beam; Again in the power pattern of all the other wave beams, search the wave beam that compensates mutually in the gain of same angle with current wave beam, and this wave beam is defined as the wave beam of next time period correspondence, in this manner, up to the arrangement of finishing all wave beams, for example putting in order of 8 groups of wave beams is B1 → B3 → B5 → B7 → B2 → B4 → B6 → B8 → B1.

Figure 12 shows the schematic diagram of two groups of wave beams that the gain of same angle compensates mutually.As can be seen from Figure 12, on 50 ° and 310 ° of directions, the gain of wave beam B1 is bigger, and the gain of wave beam B2 is less; On 30 ° and 330 ° of directions, the gain of wave beam B1 is less, and the gain of wave beam B2 is bigger.When wave beam B1 and wave beam B2 correspondence adjacent time intervals, the fading characteristic of two wave beam spatial channel corresponding exists than big-difference like this, and therefore, receiving terminal stage gain in obtainable minute is bigger, thereby the transmission performance of MBMS can be guaranteed.

In step 1105, with the predetermined time period be unit, according to determined wave beam order, MBMS transmission business.

In this step, begin from the initial time section that begins the MBMS transmission business, every through a time period, just carry out a wave beam saltus step, change the wave beam of MBMS transmission business.In other words, stop using each transmitting antenna in the corresponding wave beam of current slot, and transfer each transmitting antenna that starts in the corresponding wave beam of next time period to.Time period in the present embodiment can be time slot, subframe or radio frames.

So far, finish MBMS transfer process in the present embodiment.

In order to make full use of several transmitting antennas in the antenna system, can utilize different wave beams to send different MBMS business simultaneously.Similar to embodiment 2, under the situation that has multiple MBMS business, different business is the interior corresponding identical transmitting antenna of section at one time, in order to solve the resource conflict problem of this moment, can be each MBMS traffic assignments transmission priority in advance in the present embodiment, the higher MBMS business of priority has the priority that takies transmission channel.So every through a time period, judge whether there is the higher MBMS business of priority that in current slot, to transmit on the current wave beam, if then wait for a time period, the wave beam of next time period correspondence as current wave beam, and is returned and carries out above-mentioned decision operation; Otherwise, in current slot, utilize current wave beam MBMS transmission business, the wave beam of next time period correspondence as current transmitting antenna, and is returned and carries out above-mentioned decision operation.

The schematic diagrames of the multiple MBMS business of transmission on many group wave beams when Figure 13 shows with subframe as the time period.In Figure 13, include four kinds of MBMS professional S1, S2, S3 and S4 altogether.From the angle of MBMS business, the transmission channel of S1 is arranged to: subframe 1-wave beam B1, and subframe 2-wave beam B3 ..., subframe 4-wave beam B4; From the angle of subframe, be example with subframe 1, wave beam B1 goes up transmission S1, and wave beam B2 goes up transmission S4, and wave beam B3 goes up transmission S2, and wave beam B4 goes up transmission S3.As seen the different MBMS business of synchronization is utilized different wave beam transmission.Like this, because that synchronization is organized the MBMS signal that wave beam transmits more is different, therefore, the transmitting power PAR on the transmitting antenna of every group of wave beam is also lower.

Embodiment 7

Present embodiment can be copied the mode of embodiment 3, adopts many group wave beams MBMS transmission business simultaneously at one time in the section, and the code channel of the corresponding non-overlapping copies of every group of wave beam in the same time period.

Figure 14 shows the method flow diagram of the professional transmission of MBMS in the present embodiment.Referring to Figure 14, this method comprises:

In step 1401, the number of antennas that comprises in every group of wave beam is set, according to set number of transmit antennas, from all transmitting antennas, choose, obtain a plurality of antenna groupings, and form the transmitting antenna grouping set.

In step 1402, utilize predetermined all weights that beam forming processing is carried out in each the antenna grouping in the antenna grouping set, obtain many group wave beams.

In step 1403, wave beam number according to the predetermined same time period, select wave beam to form the beam combination of current slot, each wave beam in this beam combination compensates mutually in the gain of same angle, and is the code channel of each the beam allocation non-overlapping copies in this beam combination.

Similar to embodiment 3, the current slot in the present embodiment also be meant before the MBMS transfer of data, carry out the space newly arrive distribute at time period, but not on the time dimension just in the elapsed time section.

In step 1404～1405, judge whether current slot is the most last time period, if then execution in step 1407; Otherwise the wave beam of selecting to compensate mutually in the gain of same angle with the beam combination of current slot is formed the beam combination of next time period and is the code channel of each the beam allocation non-overlapping copies in this beam combination.

In step 1406, with next time period as current slot, return execution in step 1404.

In step 1407, be bound-time unit with the time period, according to the beam combination transmission MBMS data of determined each time period.

In this step when sending the MBMS data, the code channel that the wave beam of working simultaneously in the same time period is corresponding different.

So far, finish the flow process of the professional transmission of MBMS in the present embodiment.

Figure 15 shows the code channel schematic diagram of a kind of MBMS business correspondence on four groups of wave beams.Referring to Figure 15, for the professional S1 of MBMS, wave beam B1 the corresponding the 1st is to m ₁Individual code channel, wave beam B2 correspondence (m ₂+ 1) to m ₃Individual code channel, wave beam B3 correspondence (m ₁+ 1) to m ₂Individual code channel, wave beam B4 correspondence (m ₃+ 1) to m ₄Individual code channel.At one time in the section, the different wave beam of each code channel respective channels fading characteristic, so the signal to noise ratio of MBMS signal transmission further improves, thus the transmission performance of MBMS business also makes moderate progress.

Certainly, also can when distributing the code channel of every group of wave beam correspondence, take all factors into consideration multiple MBMS business.In other words, at one time on the section, the professional corresponding different wave beam of different MBMS and the code channel of corresponding non-overlapping copies.In order to prevent the resource contention of multiple business, Figure 16 shows the method flow diagram of the MBMS transmission business on wave beam of organizing in the present embodiment at each.Referring to Figure 16, organize MBMS transmission business on wave beam at each as follows here:

In step 1601, judge whether there is the higher MBMS business of priority that in current slot, to transmit in the current wave beam, if then execution in step 1602; Otherwise, execution in step 1603.

In step 1602, judge whether the corresponding code channel of MBMS business in the current wave beam is used by the higher MBMS business of priority in current slot, if then execution in step 1604; Otherwise, execution in step 1605.

In step 1603, in current slot, utilize current wave beam and corresponding code channel MBMS transmission business.

In step 1604, judge whether end of transmission of MBMS business, if, process ends then; Otherwise, execution in step 1605.

In step 1605, when current slot finishes, next wave beam as current wave beam, and is returned execution in step 1601.

So far, finish this MBMS transfer process.

To 1605, the professional corresponding different wave beam of different MBMS and the code channel of corresponding non-overlapping copies can further enlarge the difference of channel fading like this, thereby improve the transmission performance of MBMS by above-mentioned step 1601.

Embodiment 8

The receptivity of considering receiving terminal UE changes, present embodiment with the received signal code power (RSCP) of UE as one of factor of channel adjustment, to obtain better MBMS service transmission performance.

Figure 17 shows the method flow diagram of MBMS transmission in the present embodiment.Set in advance the receptivity measurement period in the present embodiment.Referring to Figure 17, this method comprises:

In step 1701, the UE that notifies all to receive current MBMS business reports RSCP.

In this step, network side notifies the UE that belongs to same MBMS service groups to report the RSCP of self by starting MBMS counting process.For UE,, then set up process and report RSCP by Radio Resource control (RRC) connection if be in idle pulley; If when being in universal mobile telecommunications system land radio access web registration area paging channel (URA_PCH) state or cell paging channel (CELL_PCH) state, UE reports RSCP by cell updating course.

In step 1702～1703, judge whether to exist RSCP, if then upgrade the number of receptivity poor user less than the UE receptivity thresholding that sets in advance; Otherwise, return execution in step 1701.

In the present embodiment, the number N of the UE that network side is relatively poor with receptivity in the MBMS service groups of current transmission in advance is made as initial value 0, and pre-determines UE receptivity thresholding according to the attribute of use network.In two steps herein, network side whenever receives a RSCP, just by judging whether the UE determine this RSCP correspondence is in the relatively poor situation of receptivity at this moment, and at RSCP during less than UE receptivity thresholding, on the number N of receptivity poor user, add 1, i.e. N=N+1.

In step 1704～1707, judge whether the number of receptivity poor user reaches the saltus step thresholding that sets in advance, if, then carry out antenna hopping or wave beam saltus step, and process ends; Otherwise, judge whether to arrive the receptivity measurement period that sets in advance, if arrive, then with the number zero clearing of receptivity poor user, and return execution in step 1701, if execution in step 1701 is then returned in no show.

When the number of receptivity poor user reaches the saltus step thresholding, show that diversity gain that receiving terminal can obtain can't satisfy the requirement of correct reception MBMS business, network side need pass through the mode of antenna hopping or wave beam saltus step in next time period so, adjust the channel of MBMS transmission business, so that improve the quality of service (Qos) in the professional transmission course of MBMS, thereby improve the transmission performance of MBMS business.

The flow process of present embodiment can combine with the scheme of embodiment 2 to 4, carries out above-mentioned step 1701 to 1707 before each time period in the MBMS transmission process arrives.Particularly, for embodiment 2 and 3, can first execution in step 301 to 305 or step 601 determine the operation of the transmitting antenna order of each time period in 606, then concrete execution in step 306 or 607 o'clock, operate to 1707 according to step 1701, and when in step 1707, carrying out antenna hopping, jump to the transmitting antenna of next time period from the transmitting antenna of current slot.For embodiment 4 and 5, the step 1701 is here carried out in step 901 or 1001 backs to 1707, and according to step 902 to 905 or the operation of step 1002 to 1007 come execution in step 1707.For embodiment 6 and 7, at first execution in step 1101 to 1104 or step 1401 operation to 1406, then concrete execution in step 1105 or 1407 o'clock, operate to 1707 according to step 1701, and when in step 1707, carrying out the wave beam saltus step, jump to the wave beam of next time period from the wave beam of current slot.

In order to guarantee carrying out smoothly of MBMS transfer process among above-mentioned each embodiment, the present invention also provides and has been used for the professional system for transmitting of MBMS.Figure 18 shows the structural representation of MBMS service transmission system in the embodiment of the invention.As shown in figure 18, this system comprises: base station and UE, and wherein the space channel of each time period MBMS transmission business is determined according to the strongest principle of channel independence in the base station, and on the space channel of each time period correspondence, sends the MBMS business datum to receiving terminal; UE is used to receive the MBMS business datum that comes from the base station.

Further, MBMS service transmission system among Figure 18 also comprises radio network controller (RNC), UE receptivity thresholding that preservation sets in advance and saltus step thresholding, before each time period arrives, the UE that receives current MBMS business by the base station notice reports RSCP and receives the RSCP that comes from these UE, according to RSCP that receives and the UE receptivity thresholding preserved, determine the receptivity situation of UE, when the UE number that is in the relatively poor situation of receptivity reached the saltus step thresholding of being preserved, informing base station was adjusted the space channel of MBMS transmission business.

When having RNC in the system, the base station UE that receives current MBMS business that can also send a notice in the indication of RNC reports RSCP, reception comes from the RSCP of these UE, the RSCP that receives is sent to RNC, and under the notice of RNC,, in next time period, change space channel according to the space channel of determined each time period MBMS transmission business.Correspondingly, UE receive come from the base station about reporting the notice of RSCP, self RSCP is measured, and the RSCP that is obtained is sent to the base station.

Figure 19 shows the structural representation of the network equipment that is used for the professional transmission of MBMS in the embodiment of the invention.Referring to Figure 19, this network equipment comprises: MBMS scheduler module, memory module and communication module.Wherein, the MBMS scheduler module is according to the strongest principle of channel independence, determine the space channel of each time period MBMS transmission business, determined spatial channel information is sent to memory module, when each time period arrives, from memory module, read the space channel of current slot correspondence, and the spatial channel information that reads is sent to communication module.Memory module receives from the spatial channel information of MBMS scheduler module and preserves, and preserves the MBMS business datum that needs transmission.Communication module receives the spatial channel information of the current slot correspondence of MBMS scheduler module transmission, reads the MBMS business datum from memory module, and the MBMS business datum that reads is carried on the space channel of current slot correspondence, sends to receiving terminal.The network equipment here can be the base station.

Figure 20 shows the MBMS scheduler module that is applied to technical scheme in the embodiment of the invention 2 and the structural representation of communication module.As shown in figure 20, the MBMS scheduler module comprises: measure submodule, control submodule and timer, and communication module comprises several transmitting antennas.Wherein, all that measure that submodule determines number of transmit antennas and transmitting antenna put in order, and measure all coefficient correlations between per two width of cloth transmitting antennas of putting in order down, and the coefficient correlation that obtains is sent to the control submodule; The control submodule determines that the channel coefficient correlation reduces the factor, reception comes from the coefficient correlation between per two width of cloth transmitting antennas of measuring submodule, the coefficient correlation that reduces the factor and receive according to determined coefficient correlation, calculate all transmitting antenna average correlation coefficients under putting in order, putting in order of average correlation coefficient minimum is defined as the professional transmitting antenna order of transmitting of MBMS, and determined transmitting antenna is sent to memory module in proper order; This control module is also under the indication of timer, from memory module, read the transmitting antenna information and the MBMS business datum of current slot correspondence, the MBMS business datum that reads is sent to communication module, and the transmitting antenna of current slot correspondence is started working and the transmitting antenna of a last time period correspondence quits work in the notification communication module.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.For the transmitting antenna in the communication module, the conjunction measuring submodule carries out the measurement of coefficient correlation between transmitting antenna; Start working under the notice of control submodule, reception comes from the MBMS business datum of controlling submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

Embodiment 3 also can use the structure among Figure 20.At this moment, measurement submodule in the MMBMS scheduler module is determined transmitting antenna sum and the number of transmit antennas of same time period, form many group emitting antenna combination according to the number of transmit antennas of same time period, measure the coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, and the coefficient correlation that obtains is sent to the control submodule; The control submodule receives the coefficient correlation that comes between per two width of cloth transmitting antennas of measuring submodule, calculate the average correlation coefficient of all emitting antenna combination, with the candidate transmitting combination of antennas of average correlation coefficient minimum emitting antenna combination as current slot, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in this emitting antenna combination, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the emitting antenna combination of the candidate transmitting combination of antennas of coefficient correlation minimum as next time period, be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period, and emitting antenna combination and the corresponding code channel information of determined each time period sent to memory module; This control module is also under the indication of timer, from memory module, read the emitting antenna combination information of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS business datum that reads is sent to communication module, and the emitting antenna combination of current slot correspondence is started working and the emitting antenna combination of a last time period correspondence quits work in the notification communication module.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.For the transmitting antenna in the communication module, the conjunction measuring submodule carries out the measurement of coefficient correlation between transmitting antenna; Start working under the notice of control submodule, reception comes from the MBMS business datum of controlling submodule, utilizes corresponding code channel that the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

Structure among Figure 20 is equally applicable to the technical scheme of the embodiment of the invention 4.At this moment, for the MBMS scheduler module, measure submodule and measure, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and the estimated channel impulse response that goes out is sent to the control submodule by up channel.The control submodule receives from the channel impulse response of measuring submodule, calculate the transmitting antenna of current slot correspondence and the channel impulse response coefficient correlation between all the other transmitting antennas, with the emitting antenna selecting of channel impulse response coefficient correlation minimum is the transmitting antenna of next time period correspondence, and the transmitting antenna information of next time period correspondence is sent to memory module; And should control submodule also under the indication of timer, from memory module, read the transmitting antenna information and the MBMS business datum of current slot correspondence, the MBMS data that read are sent to communication module, and the transmitting antenna of current slot correspondence is started working and the transmitting antenna of a last time period correspondence quits work in the notification communication module.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.For the transmitting antenna in the communication module, the conjunction measuring submodule carries out up channel and measures; Start working under the notice of control submodule, reception comes from the MBMS business datum of controlling submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

Embodiment 5 also can adopt the structure of Figure 20.At this moment, measurement submodule in the MBMS scheduler module is determined transmitting antenna sum and the number of transmit antennas of same time period, form many group emitting antenna combination according to the number of transmit antennas of same time period, measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and the estimated channel impulse response that goes out is sent to the control submodule.The control submodule receives from the channel impulse response of measuring submodule, calculate the channel impulse response coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, calculate the average channel impulse response coefficient correlation of all emitting antenna combination, with average channel impulse response coefficient correlation less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas, with the candidate transmitting combination of antennas of average channel impulse response coefficient correlation minimum emitting antenna combination as current slot, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in this emitting antenna combination, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the emitting antenna combination of the big line combination of candidate transmitting of coefficient correlation minimum as next time period, be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period, and determined emitting antenna combination information and corresponding code channel information are sent to memory module; And should control submodule also under the indication of timer, from memory module, read the emitting antenna combination information of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS data that read are sent to communication module, and the emitting antenna combination of current slot correspondence is started working and the emitting antenna combination of a last time period correspondence quits work in the notification communication module.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.For the transmitting antenna in the communication module, the conjunction measuring submodule carries out up channel and measures; Start working under the notice of control submodule, reception comes from the MBMS business datum of controlling submodule, utilizes corresponding code channel that the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

Figure 21 shows the MBMS scheduler module that is applied to technical scheme in the embodiment of the invention 6 and the structural representation of communication module.As shown in figure 21, the MBMS scheduler module comprises: control submodule and timer.Wherein, the control submodule reads many group wave beam information from memory module, determine the gain of every group of wave beam on all angles by emulation, and adjacent two wave beams of foundation are in the mutual compensation principle of the gain of same angle, determine the wave beam order, and determined wave beam is sent to memory module in proper order; And should control submodule also under the indication of timer, from memory module, read the wave beam information and the MBMS business datum of current slot correspondence, the MBMS data that read are sent to communication module, and the transmitting antenna of the corresponding wave beam of current slot was started working and the transmitting antenna of corresponding wave beam of a last time period quits work in the notification communication module.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Form submodule for the wave beam in the communication module, from memory module, read the transmitting antenna information and the corresponding weights that comprise in every group of wave beam, obtain the transmitting antenna grouping set according to the transmitting antenna information that reads; The weights that utilization reads carry out beam forming processing to each the antenna grouping in the antenna grouping set, obtain many group wave beams, and the wave beam information that obtains is sent to memory module; Reception comes from the MBMS business datum of controlling submodule, according to the notice of control submodule, forms the wave beam of current slot correspondence, and the MBMS business datum that receives is sent to the transmitting antenna in the wave beam of forming; Perhaps, the transmitting antenna of controlling under the notice of control submodule in the corresponding wave beam of a time period quits work.

For the transmitting antenna in the communication module, under the control of wave beam formation submodule, start working, receive the MBMS business datum that comes from wave beam formation submodule, the MBMS business datum that receives is sent to receiving terminal; Perhaps, under the notice of wave beam formation submodule, quit work.

Structure shown in Figure 21 is when being applied to embodiment 7, control submodule in the MBMS scheduler module reads many group wave beam information and the wave beam number of same time period from memory module, determine of the gain of each wave beam by emulation in same angle, according to the gain principle of complementarity, select the beam combination of current slot, code channel for each the beam allocation non-overlapping copies in this beam combination, and the beam combination of selection and current slot is formed the beam combination of next time period and is the code channel of each the beam allocation non-overlapping copies in this beam combination at the wave beam that the gain of same angle compensates mutually, and determined beam combination information and corresponding code channel information are sent to memory module; And should control submodule also under the indication of timer, from memory module, read the wave beam information combination of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS data that read are sent to communication module, and in the notification communication module transmitting antenna in the corresponding beam combination of current slot start working and corresponding beam combination of a last time period in transmitting antenna quit work.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

Form submodule for the wave beam in the communication module, from memory module, read the transmitting antenna information and the corresponding weights that comprise in every group of wave beam, obtain the transmitting antenna grouping set according to the transmitting antenna information that reads; The weights that utilization reads carry out beam forming processing to each the antenna grouping in the antenna grouping set, obtain many group wave beams, and the wave beam information that obtains is sent to memory module; Reception comes from the MBMS business datum of controlling submodule, according to the notice of control submodule, forms the wave beam of current slot correspondence, and the MBMS business datum that receives and corresponding code channel information are sent to the transmitting antenna in the wave beam of forming; Perhaps, the transmitting antenna of controlling under the notice of control submodule in the corresponding wave beam of a time period quits work.

For the transmitting antenna in the communication module, under the control of wave beam formation submodule, start working, receive the MBMS business datum that comes from wave beam formation submodule, utilize corresponding code channel that the MBMS business datum that receives is sent to receiving terminal; Perhaps, under the notice of wave beam formation submodule, quit work.

By above-mentioned description as can be known, all the MBMS service distribution is transmitted having on the space channel of different fading characteristics among each embodiment of the present invention, because these space channels occur lower than the probability of lossy simultaneously, therefore the receiving terminal that receives the MBMS business can obtain better diversity gain, thereby obtains the higher MBMS signal of signal to noise ratio.Compare with existing MBMS transmission method, the transmission performance of MBMS business improves greatly in the technique scheme.Correspondingly, under MBMS service transmission performance condition with higher, the user far away with base station distance also can receive the higher MBMS signal of quality, i.e. the present invention can also increase the coverage of MBMS sub-district effectively.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (28)

1. the transmission method of a multimedia broadcast-multicast service MBMS is characterized in that, this method comprises:

According to the strongest principle of channel independence, determine the space channel of each time period MBMS transmission business; On the space channel of each time period correspondence, send the MBMS business datum to receiving terminal.

2. the method for claim 1 is characterized in that, the space channel of described definite each time period MBMS transmission business is:

All that determine number of transmit antennas and transmitting antenna put in order, and definite channel coefficient correlation reduces the factor;

Measure all coefficient correlations between per two width of cloth transmitting antennas of putting in order down, and the coefficient correlation of utilizing determined channel coefficient correlation to reduce the factor and measure, calculate all transmitting antenna average correlation coefficients under putting in order;

Putting in order of average correlation coefficient minimum is defined as the transmitting antenna order of the professional transmission of MBMS, and each transmitting antenna in this transmitting antenna order is defined as successively the transmitting antenna of each time period correspondence.

3, method as claimed in claim 2 is characterized in that, all transmitting antenna average correlation coefficients under putting in order of described calculating are:

If the coefficient correlation between two adjacent transmitting antennas is ρ, the transmitting antenna average correlation coefficient under the x kind puts in order is ρ _x, then ${\mathrm{\&rho;}}_x=\frac{1}{N}(\underset{k=2}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&rho;}}^{|A_k-A_{k-1}|}+\mathrm{\&gamma;}\underset{j=3}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&rho;}}^{|A_j-A_{j-2}|}),$ Wherein N is a number of transmit antennas, and γ reduces the factor for the channel coefficient correlation,

Be the coefficient correlation between k width of cloth transmitting antenna and (k-1) width of cloth transmitting antenna, It is the coefficient correlation between j width of cloth transmitting antenna and (j-2) width of cloth transmitting antenna.

4, the method for claim 1 is characterized in that, the space channel of described definite each time period MBMS transmission business is:

Determine transmitting antenna sum and the number of transmit antennas of same time period, from all transmitting antennas, choose, obtain many group emitting antenna combination according to the number of transmit antennas of same time period;

Measure the coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, calculate the average correlation coefficient of each emitting antenna combination, and with the average correlation coefficient less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas;

With the candidate transmitting combination of antennas of average correlation coefficient minimum emitting antenna combination, and be the code channel that every width of cloth transmitting antenna in this emitting antenna combination distributes non-overlapping copies as current slot;

Calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the candidate transmitting combination of antennas of coefficient correlation minimum as the emitting antenna combination of next time period, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period.

5, the method for claim 1 is characterized in that, the space channel of described definite each time period MBMS transmission business is:

Select the transmitting antenna of initial time section;

In time period after the initial time section, measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, calculate the transmitting antenna of current slot correspondence and the channel impulse response coefficient correlation between all the other transmitting antennas, and be the transmitting antenna of next time period the emitting antenna selecting of channel impulse response coefficient correlation minimum.

6, method as claimed in claim 5 is characterized in that, the transmitting antenna of described calculating current slot correspondence and the channel impulse response coefficient correlation between all the other transmitting antennas are:

If the channel impulse response coefficient correlation between the transmitting antenna of current slot correspondence and all the other transmitting antennas is γ _Ij, then ${\mathrm{\&gamma;}}_{\mathrm{ij}}=\frac{E[h_i*h_j]-E\left[h_i\right]*E\left[h_j\right]}{\sqrt{E\left[{h_i}^2\right]-E^2\left[h_i\right]}*\sqrt{E\left[{h_j}^2\right]-E^2\left[h_j\right]}},$ H wherein _iBe the channel impulse response of the transmitting antenna of current slot correspondence, h _jBe the channel impulse response of j width of cloth transmitting antenna, operator E represents to ask for covariance, and 1≤j≤N.

7, the method for claim 1 is characterized in that, the space channel of described definite each time period MBMS transmission business is:

Determine transmitting antenna sum and the number of transmit antennas of same time period, from all transmitting antennas, choose, obtain many group emitting antenna combination according to the number of transmit antennas of same time period;

Measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and calculate the channel impulse response coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination;

According to the channel impulse response coefficient correlation of calculating, calculate the average channel impulse response coefficient correlation of all emitting antenna combination, with average channel impulse response coefficient correlation less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas, with the candidate transmitting combination of antennas of average channel impulse response coefficient correlation minimum emitting antenna combination, and be the code channel that every width of cloth transmitting antenna in this emitting antenna combination distributes non-overlapping copies as current slot;

Calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the candidate transmitting combination of antennas of coefficient correlation minimum as the emitting antenna combination of next time period, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period.

8, as claim 2 or 5 described methods, it is characterized in that, describedly send the MBMS business datum to receiving terminal and be:

When current slot finishes, stop the transmitting antenna of current slot correspondence, with next time period as current slot, start corresponding transmitting antenna, as current transmitting antenna, and this current transmitting antenna MBMS transmission business of utilization.

9, as claim 4 or 7 described methods, it is characterized in that, describedly send the MBMS business datum to receiving terminal and be:

When current slot finishes, stop the transmitting antenna of current slot correspondence, with next time period as current slot, start corresponding transmitting antenna, as current transmitting antenna, and utilize the corresponding code channel MBMS transmission business of this current transmitting antenna.

10, method as claimed in claim 9 is characterized in that, this method further comprises: be each MBMS traffic assignments priority in advance;

The described corresponding code channel of current transmitting antenna that utilizes in current slot transmits before the described MBMS business, further comprises:

A11. judge described MBMS business on current transmitting antenna corresponding code channel in current slot whether by professional use of the higher MBMS of priority, if, process ends then; Otherwise, carry out the described corresponding code channel of current transmitting antenna that in current slot, utilizes and transmit described MBMS business.

11, method as claimed in claim 8 is characterized in that, before the described transmitting antenna that stops the current slot correspondence, further comprises:

A101. notify described receiving terminal to report received signal code power RSCP, judge whether to exist RSCP, if then upgrade the number of receptivity poor user and execution in step A102 less than the receptivity thresholding that sets in advance; Otherwise, return and carry out this step;

Whether the number of A102. judging the receptivity poor user reaches the saltus step thresholding that sets in advance, if then carry out the described transmitting antenna that stops the current slot correspondence; Otherwise, judge whether to arrive the receptivity measurement period that sets in advance, if arrive, then with the number zero clearing of receptivity poor user, and return and carry out described steps A 101, if no show is then directly returned and carried out described steps A 101.

12, method as claimed in claim 9 is characterized in that, before the described transmitting antenna that stops the current slot correspondence, further comprises:

A201. notify described receiving terminal to report received signal code power RSCP, judge whether to exist RSCP, if then upgrade the number of receptivity poor user and execution in step A202 less than the receptivity thresholding that sets in advance; Otherwise, return and carry out this step;

Whether the number of A202. judging the receptivity poor user reaches the saltus step thresholding that sets in advance, if then carry out the described transmitting antenna that stops the current slot correspondence; Otherwise, judge whether to arrive the receptivity measurement period that sets in advance, if arrive, then with the number zero clearing of receptivity poor user, and return and carry out described steps A 201, if no show is then directly returned and carried out described steps A 201.

13, the method for claim 1 is characterized in that, the space channel of described definite each time period MBMS transmission business is:

The number of antennas that comprises in every group of wave beam is set,, from all transmitting antennas, chooses, obtain a plurality of antenna groupings, and form the transmitting antenna grouping set according to set number of transmit antennas;

Utilize predetermined all weights that beam forming processing is carried out in each the antenna grouping in the antenna grouping set, obtain many group wave beams;

In the mutual compensation principle of the gain of same angle, determine the wave beam order between adjacent two wave beams of foundation, and each wave beam in this wave beam order is defined as successively the wave beam of each time period correspondence.

14, the method for claim 1 is characterized in that, the space channel of described definite each time period MBMS transmission business is:

The number of antennas that comprises in every group of wave beam is set,, from all transmitting antennas, chooses, obtain a plurality of antenna groupings, and form the transmitting antenna grouping set according to set number of transmit antennas;

Utilize predetermined all weights that beam forming processing is carried out in each the antenna grouping in the antenna grouping set, obtain many group wave beams;

According to the wave beam number of predetermined same time period, select wave beam to form the beam combination of current slot, each wave beam in this beam combination compensates mutually in the gain of same angle, and is the code channel of each the beam allocation non-overlapping copies in this beam combination;

The wave beam of selecting to compensate mutually in the gain of same angle with the beam combination of current slot is formed the beam combination of next time period and is the code channel of each the beam allocation non-overlapping copies in this beam combination.

15, as claim 13 or 14 described methods, it is characterized in that, describedly send the MBMS business datum to receiving terminal and be:

When current slot finishes, stop the wave beam of current slot correspondence, with next time period as current slot, start corresponding wave beam, as current wave beam, and utilize deserve before the corresponding code channel MBMS transmission business of wave beam.

16, method as claimed in claim 15 is characterized in that, this method further comprises: be each MBMS traffic assignments priority in advance;

Before the described MBMS transmission business, further comprise:

A21. judge described MBMS business the corresponding code channel of current wave beam in current slot whether by professional use of the higher MBMS of priority, if, process ends then; Otherwise, carry out the corresponding code channel MBMS transmission business that preceding wave beam is deserved in described utilization.

17, method as claimed in claim 15 is characterized in that, before the described wave beam that stops the current slot correspondence, further comprises:

A301. notify described receiving terminal to report received signal code power RSCP, judge whether to exist RSCP, if then upgrade the number of receptivity poor user and execution in step A302 less than the receptivity thresholding that sets in advance; Otherwise, return and carry out this step;

Whether the number of A302. judging the receptivity poor user reaches the saltus step thresholding that sets in advance, if then carry out the described transmitting antenna that stops the current slot correspondence; Otherwise, judge whether to arrive the receptivity measurement period that sets in advance, if arrive, then with the number zero clearing of receptivity poor user, and return and carry out described steps A 201, if no show is then directly returned and carried out described steps A 301.

18, a kind of network equipment that is used for multimedia broadcast-multicast service MBMS transmission is characterized in that this network equipment comprises: MBMS scheduler module, memory module and communication module, wherein,

Described MBMS scheduler module is according to the strongest principle of channel independence, determine the space channel of each time period MBMS transmission business, determined spatial channel information is sent to memory module, when each time period arrives, from memory module, read the space channel of current slot correspondence, and the spatial channel information that reads is sent to communication module;

Described memory module receives from the spatial channel information of MBMS scheduler module and preserves, and preserves the MBMS business datum that needs transmission;

Described communication module receives the spatial channel information of the current slot correspondence of MBMS scheduler module transmission, from memory module, read the MBMS business datum, and the MBMS business datum that reads is carried on the space channel of current slot correspondence, send to receiving terminal.

19, the network equipment as claimed in claim 18 is characterized in that, described MBMS scheduler module comprises: measure submodule, control submodule and timer, wherein,

Described measurement submodule determine number of transmit antennas and transmitting antenna all put in order, measure all coefficient correlations between per two width of cloth transmitting antennas of putting in order down, and the coefficient correlation that obtains sent to the control submodule;

Described control submodule determines that the channel coefficient correlation reduces the factor, reception comes from the coefficient correlation between per two width of cloth transmitting antennas of measuring submodule, the coefficient correlation that reduces the factor and receive according to determined coefficient correlation, calculate all transmitting antenna average correlation coefficients under putting in order, putting in order of average correlation coefficient minimum is defined as the professional transmitting antenna order of transmitting of MBMS, and determined transmitting antenna is sent to memory module in proper order; Under the indication of timer, from memory module, read the transmitting antenna information and the MBMS business datum of current slot correspondence, the MBMS business datum that reads is sent to communication module, the notification communication module is carried out the transmitting antenna saltus step;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

20, the network equipment as claimed in claim 18 is characterized in that, described MBMS scheduler module comprises: measure submodule, control submodule and timer, wherein,

Described measurement submodule is determined transmitting antenna sum and the number of transmit antennas of same time period, form many group emitting antenna combination according to the number of transmit antennas of same time period, measure the coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, and the coefficient correlation that obtains is sent to the control submodule;

Described control submodule receives the coefficient correlation that comes between per two width of cloth transmitting antennas of measuring submodule, calculate the average correlation coefficient of all emitting antenna combination, with the candidate transmitting combination of antennas of average correlation coefficient minimum emitting antenna combination as current slot, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in this emitting antenna combination, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the emitting antenna combination of the candidate transmitting combination of antennas of coefficient correlation minimum as next time period, be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period, and emitting antenna combination and the corresponding code channel information of determined each time period sent to memory module; Under the indication of timer, from memory module, read the emitting antenna combination information of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS business datum that reads is sent to communication module, and the emitting antenna combination of current slot correspondence is started working and the emitting antenna combination of a last time period correspondence quits work in the notification communication module;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

21, the network equipment as claimed in claim 18 is characterized in that, described MBMS scheduler module comprises measures submodule, control submodule and timer, wherein,

Described measurement submodule is measured by up channel, estimates the channel impulse response on the every width of cloth transmitting antenna of current slot, and the estimated channel impulse response that goes out is sent to the control submodule;

Described control submodule receives from the channel impulse response of measuring submodule, calculate the transmitting antenna of current slot correspondence and the channel impulse response coefficient correlation between all the other transmitting antennas, with the emitting antenna selecting of channel impulse response coefficient correlation minimum is the transmitting antenna of next time period correspondence, and the transmitting antenna information of next time period correspondence is sent to memory module; Under the indication of timer, from memory module, read the transmitting antenna information and the MBMS business datum of current slot correspondence, the MBMS data that read are sent to communication module, and the notification communication module is carried out the transmitting antenna saltus step;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

22, the network equipment as claimed in claim 18 is characterized in that, described MBMS scheduler module comprises measures submodule, control submodule and timer, wherein,

Described measurement submodule is determined transmitting antenna sum and the number of transmit antennas of same time period, form many group emitting antenna combination according to the number of transmit antennas of same time period, measure by up channel, estimate the channel impulse response on the every width of cloth transmitting antenna of current slot, and the estimated channel impulse response that goes out is sent to the control submodule;

Described control submodule receives from the channel impulse response of measuring submodule, calculate the channel impulse response coefficient correlation between per two width of cloth transmitting antennas in all emitting antenna combination, calculate the average channel impulse response coefficient correlation of all emitting antenna combination, with average channel impulse response coefficient correlation less than the emitting antenna combination of the correlation thresholding that sets in advance as the candidate transmitting combination of antennas, with the candidate transmitting combination of antennas of average channel impulse response coefficient correlation minimum emitting antenna combination as current slot, and be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in this emitting antenna combination, calculate the emitting antenna combination of current slot and the coefficient correlation of all the other candidate transmitting combination of antennas, select the emitting antenna combination of the candidate transmitting combination of antennas of coefficient correlation minimum as next time period, be the code channel of the every width of cloth transmitting antenna distribution non-overlapping copies in the emitting antenna combination of this next time period, and determined emitting antenna combination information and corresponding code channel information are sent to memory module; And under the indication of timer, from memory module, read the emitting antenna combination information of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS data that read are sent to communication module, and the emitting antenna combination of current slot correspondence is started working and the emitting antenna combination of a last time period correspondence quits work in the notification communication module;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

As the claim 19 or the 20 described network equipments, it is characterized in that 23, described communication module comprises at least two width of cloth transmitting antennas, described transmitting antenna conjunction measuring submodule carries out the measurement of coefficient correlation between transmitting antenna; Start working under the notice of described control submodule, reception comes from the MBMS business datum of controlling submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

As the claim 21 or the 22 described network equipments, it is characterized in that 24, described communication module comprises at least two width of cloth transmitting antennas, described transmitting antenna conjunction measuring submodule carries out up channel and measures; Start working under the notice of described control submodule, reception comes from the MBMS business datum of controlling submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the notice of control submodule.

25, the network equipment as claimed in claim 18 is characterized in that, described MBMS scheduler module comprises: control submodule and timer, wherein,

Described control submodule reads many group wave beam information from memory module, determine the gain of every group of wave beam on all angles by emulation, in the mutual compensation principle of the gain of same angle, determine the wave beam order according to adjacent two wave beams, and determined wave beam is sent to memory module in proper order; Under the indication of timer, from described memory module, read the wave beam information and the MBMS business datum of current slot correspondence, the MBMS data that read are sent to communication module, and the notification communication module is carried out the wave beam switching;

Described timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

26, the network equipment as claimed in claim 25 is characterized in that, described memory module is further preserved transmitting antenna information and the corresponding weights that comprise in the every group of wave beam that sets in advance;

Described communication module comprises: wave beam forms submodule and at least two width of cloth transmitting antennas, wherein,

Described wave beam forms submodule and read transmitting antenna information and the corresponding weights that comprise in every group of wave beam from memory module, obtains the transmitting antenna grouping set according to the transmitting antenna information that reads; The weights that utilization reads carry out beam forming processing to each the antenna grouping in the antenna grouping set, obtain many group wave beams, and the wave beam information that obtains is sent to memory module; Reception comes from the MBMS business datum of controlling submodule, notice according to the control submodule, form the wave beam of current slot correspondence, and with the MBMS business datum that receives send to form transmitting antenna in the wave beam, perhaps, the transmitting antenna of controlling under the notice of control submodule in the corresponding wave beam of a time period quits work;

Described transmitting antenna receives and comes from the MBMS business datum that described wave beam forms submodule, and the MBMS business datum that receives is sent to receiving terminal, perhaps, quits work under the control of described wave beam formation submodule.

27, the network equipment as claimed in claim 18 is characterized in that, described MBMS scheduler module comprises: control submodule and timer, wherein,

Described control submodule reads many group wave beam information and the wave beam number of same time period from memory module, determine of the gain of each wave beam by emulation in same angle, according to the gain principle of complementarity, select the beam combination of current slot, code channel for each the beam allocation non-overlapping copies in this beam combination, and the beam combination of selection and current slot is formed the beam combination of next time period and is the code channel of each the beam allocation non-overlapping copies in this beam combination at the wave beam that the gain of same angle compensates mutually, and determined beam combination information and corresponding code channel information are sent to memory module; And under the indication of timer, from memory module, read the wave beam information combination of current slot correspondence, corresponding code channel information and MBMS business datum, the MBMS data that read are sent to communication module, and in the notification communication module transmitting antenna in the corresponding beam combination of current slot start working and corresponding beam combination of a last time period in transmitting antenna quit work.Timer carries out timing according to the predefined time period, and begins indication to control module transmitting time section when each time period begins.

28, the network equipment as claimed in claim 27 is characterized in that, described memory module is further preserved the wave beam number of the transmitting antenna information, corresponding weights and the same time period that set in advance;

Described communication module comprises: wave beam forms submodule and at least two width of cloth transmitting antennas, wherein,

Described wave beam forms submodule and read transmitting antenna information and the corresponding weights that comprise in every group of wave beam from memory module, obtains the transmitting antenna grouping set according to the transmitting antenna information that reads; The weights that utilization reads carry out beam forming processing to each the antenna grouping in the antenna grouping set, obtain many group wave beams, and the wave beam information that obtains is sent to memory module; Reception comes from the MBMS business datum of controlling submodule, according to the notice of control submodule, forms the wave beam of current slot correspondence, and the MBMS business datum that receives and corresponding code channel information are sent to the transmitting antenna in the wave beam of forming; Perhaps, the transmitting antenna of controlling under the notice of control submodule in the corresponding wave beam of a time period quits work;

Described transmitting antenna is started working under the control of wave beam formation submodule, receives to come from the MBMS business datum that wave beam forms submodule, utilizes corresponding code channel that the MBMS business datum that receives is sent to receiving terminal; Perhaps, under the notice of wave beam formation submodule, quit work.

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