CN103107871A - Method and device and system of business data sending and receiving based on enhanced multimedia broadcast multicast service (EMBMS) - Google Patents
Method and device and system of business data sending and receiving based on enhanced multimedia broadcast multicast service (EMBMS) Download PDFInfo
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Abstract
The invention discloses a method, a device and a system of business data sending and receiving based on enhanced multimedia broadcast multicast service (EMBMS). The sending method comprises that whether to-be-sent business data of a down-link exists or not is determined by a network side device; sending power is determined by the network side device according to a current network environment; and primary transmission is performed to the business data by the network side device using the sending power and at least one time of retransmission is performed to the business data by the network side device using the sending power. According to the method, device and system of the business data sending and receiving based on the EMBMS, the problem that terminal receiving performance is reduced caused by broadband cluster system same frequency interference is solved and the effect of improving the terminal receiving performance of the cluster system is achieved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of business datum sending, receiving method, Apparatus and system based on eMBMS.
Background technology
Long Term Evolution (Long Term Evolution is called for short LTE) is the mobile broadband network standard of future generation of 3-G (Generation Three mobile communication system) collaborative project (ThirdGeneration Partnership Project is called for short 3GPP) definition.Adopt OFDM (Orthogonal Frequency Division Multiplexing is called for short OFDM) technology and introduce the technology such as multiple-input and multiple-output (Multiple Input Multiple Output is called for short MIMO); Simultaneously can support the 1.25-20MHz bandwidth, greatly improve peak data rate and power system capacity, support the peak rate of descending 100Mbit/s, up 50Mbit/s under the 20Mhz bandwidth; The network configuration of flattening has strengthened scheduling and Radio Resource control efficiency, has shortened the time delay that continues.
Supported multimedia broadcast/multi broadcast (Multimedia Broadcasting/MulticastService in 3-G (Generation Three mobile communication system), be called for short MBMS) business, and enhanced multimedia broadcast/multicast (Evolution Multimedia Broadcasting/Multicast Service the be called for short eMBMS) business of framework in the 4th third-generation mobile communication LTE system can be applied to several scenes.The implementation of this business is that the user with intelligent terminal of video capability receives the digital audio/video business of broadcast/group broadcast form by multicast physical channel (PhysicalMulticast Channel is called for short PMCH).For eMBMS business realizing and networking mode, existing 3GPP consensus standard has provided total solution.
(the International Radio Consultative Committee of International Radio Consultative Committee, be called for short CCIR) with trunked communication system called after " Trunking Communication System ", China is translated into trunked mobile communication system with " Trunking Communication System ", often is called trunked communication system or group system.
The private wireless communication system that trunked communication system develops in order to satisfy industry user's command scheduling demand, use towards specific industry, but the wireless user's sharing wireless channel in system.This system is mainly used in command scheduling, is a kind of multipurpose, dynamical wireless communication system, and it possesses the characteristic of distinctive group calling function and short calling, therefore further requires network to have higher reliability and fail safe.
The radiation pattern of the down link of broadband group service is broadcast transmission, and is similar with the MBMS business, and the up link of broadband group service is consistent with general service; In addition, the informing mechanism of eMBMS, many cell transmission mode and data transfer mode can both be applicable to the group service characteristic.Based on this, we have proposed the method that a kind of time division duplex Long Term Evolution based on eMBMS (Time Division-Long Time Evolution is called for short TD-LTE) wideband digital group service is realized.
But, according to the group service characteristic, the down link of TD-LTE wideband digital group service is broadcast transmission, and the user who receives group service becomes scattered about in different districts at random, the distance of user's spacing is also random, this user who makes down-link transmitting power be scattered at random towards the residential quarter is theaomni-directional transmission, and conventional power control and smart antenna excipient here all can't work.Therefore, will certainly produce the co-channel interference of minizone, exist co-channel interference can cause the receptivity of terminal to descend.
The lower problem of terminal receptivity for co-channel interference in the correlation technique broadband cluster system causes not yet proposes effective solution at present.
Summary of the invention
For the lower problem of terminal receptivity that co-channel interference in broadband cluster system causes, the invention provides a kind of business datum sending, receiving method, Apparatus and system based on eMBMS, to address the above problem at least.
According to an aspect of the present invention, provide a kind of business datum sending method based on eMBMS, comprising: network equipment determines to exist the business datum of down link to be sent; Above-mentioned network equipment is determined transmitted power according to the current network environment; Above-mentioned network equipment uses this transmitted power that above-mentioned business datum is carried out just passing, and uses this transmitted power that above-mentioned business datum is retransmitted at least one times.
Preferably, above-mentioned network equipment determines that according to the current network environment transmitted power comprises: above-mentioned network equipment is according to the open loop power of current network environment and the merging gain that retransmits business datum, determine above-mentioned transmitted power, wherein, this transmitted power is lower than the open loop power of current network environment.
Preferably, above-mentioned network equipment determines that according to the open loop power of current network environment and the merging gain that retransmits business datum above-mentioned transmitted power comprises: network equipment calculates according to the current network environment and guarantees that the eMBMS channel just passes the required open loop power in coverage cell edge; Network equipment calculates to retransmit according to the current network environment and merges gain; It is that above-mentioned open loop power deducts above-mentioned re-transmission merging gain that network equipment arranges above-mentioned transmitted power.
Preferably, before the above-mentioned transmitted power of above-mentioned network equipment use carried out just passing to above-mentioned business datum, also comprise: network equipment was that business datum configures respectively the first retransfer channel of delivering a letter and retransmitting business datum that just passes business datum.
Preferably, above-mentioned network equipment is that business datum configures respectively that just pass business datum first delivered a letter and the retransfer channel that retransmits business datum comprises: the above-mentioned network equipment expansion corresponding cell of just delivering a letter, use the cell after expansion to configure retransfer channel.
Preferably, the first corresponding cell of delivering a letter of above-mentioned network equipment expansion comprises: this network equipment expands to 0-15 with the span of radio frames allocation offsets value by 0-7, and wherein, value 0-7 correspondence is just delivered a letter, the corresponding retransfer channel of value 8-15.
According to a further aspect in the invention, provide a kind of business datum method of reseptance based on eMBMS, having comprised: terminal receives the business datum that network equipment just passes; Whether the business datum that this terminal judges just passes is correct; If not, this terminal receives the business datum that network equipment retransmits; This terminal merges decoding according to the above-mentioned business datum that just passes and the business datum of above-mentioned re-transmission.
According to another aspect of the invention, provide a kind of network equipment, having comprised: sent determination module, be used for determining to exist the business datum of down link to be sent; The power determination module is used for determining transmitted power according to the current network environment; Sending module is used for using the transmitted power that the power determination module is determined that above-mentioned business datum is carried out just passing, and uses above-mentioned transmitted power that above-mentioned business datum is retransmitted at least one times.
Preferably, above-mentioned power determination module comprises: the power determination submodule is used for determining above-mentioned transmitted power according to the open loop power of current network environment and the merging gain that retransmits business datum, wherein, this transmitted power is lower than the open loop power of current network environment.
Preferably, above-mentioned power determination submodule comprises: the open loop power computing unit is used for calculating assurance eMBMS channel according to the current network environment and just passes the required open loop power in coverage cell edge; The gain computing unit is used for calculating to retransmit according to the current network environment merging gain; Setting unit, being used for arranging above-mentioned transmitted power is that the open loop power that the open loop power computing unit calculates deducts the re-transmission merging gain that the gain computing unit calculates.
Preferably, the said equipment also comprises: configuration module is used to business datum is configured respectively the first retransfer channel of delivering a letter and retransmitting business datum that just passes business datum.
Preferably, above-mentioned configuration module comprises: the expansion submodule is used for the first corresponding cell of delivering a letter of expansion; The configuration submodule is used for the cell configuration retransfer channel that uses the expansion submodule to expand.
Preferably, above-mentioned expansion submodule comprises: expanding element, be used for the span of radio frames allocation offsets value is expanded to 0-15 by 0-7, and wherein, value 0-7 correspondence is just delivered a letter, the corresponding retransfer channel of value 8-15.
In accordance with a further aspect of the present invention, provide a kind of terminal, having comprised: first transmitting/receiving module is used for receiving the business datum that network equipment just passes; Judge module, whether correct for the business datum that judges the first biography that first transmitting/receiving module receives; Retransmit receiver module, be used at judge module receiving the business datum of above-mentioned network equipment re-transmission when the determination result is NO; Merge decoding module, the business datum that is used for the first biography business datum that receives according to first transmitting/receiving module and retransmits the re-transmission that receiver module receives merges decoding.
Provide a kind of business data transmission system based on eMBMS also on the one hand according to of the present invention, it is characterized in that, comprised above-mentioned network equipment, also comprised above-mentioned terminal.
By the present invention, the Adoption Network side apparatus carries out the mode of re-transmission at least one times to business datum, even in the situation that disturb larger, can guarantee that also receiving terminal obtains this business datum, solve the lower problem of terminal receptivity that in the broadband cluster system, co-channel interference causes, and then reached the effect that improves the terminal receptivity of group system.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart based on the business datum sending method of eMBMS according to the embodiment of the present invention;
Fig. 2 is the flow chart based on the business datum method of reseptance of eMBMS according to the embodiment of the present invention;
Fig. 3 is the structured flowchart according to the first network equipment of the embodiment of the present invention;
Fig. 4 is the structured flowchart according to the second network equipment of the embodiment of the present invention;
Fig. 5 is the structured flowchart according to the third network equipment of the embodiment of the present invention;
Fig. 6 is the structured flowchart according to the 4th kind of network equipment of the embodiment of the present invention;
Fig. 7 is the structured flowchart according to the 5th kind of network equipment of the embodiment of the present invention;
Fig. 8 is the structured flowchart according to the 6th kind of network equipment of the embodiment of the present invention;
Fig. 9 is the structured flowchart according to the terminal of the embodiment of the present invention;
Figure 10 is the structured flowchart based on the business data transmission system of eMBMS according to the embodiment of the present invention;
Figure 11 sends the process flow figure of data according to the network side of the embodiment of the present invention one;
Figure 12 is the process flow figure according to the end side receive data of the embodiment of the present invention one.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
The present embodiment is based on the eMBMS framework, and in the agreement of 3GPP, the PMCH physical channel of eMBMS carrying is to adopt the open loop power emission, and power is fixed.And for the user at coverage cell edge, needing higher transmitting power, this can cause the same frequency phase mutual interference of minizone, exists co-channel interference can cause the receptivity of terminal to descend.Consider this problem, the embodiment of the present invention provides a kind of business datum sending, receiving method, Apparatus and system based on eMBMS.Be described below by embodiment.
The present embodiment provides a kind of business datum sending method based on eMBMS, and Fig. 1 is the flow chart based on the business datum sending method of eMBMS according to the embodiment of the present invention, and as shown in Figure 1, the method comprises the steps:
Step S102, network equipment determine to exist the business datum of down link to be sent;
Step S104, network equipment is determined transmitted power according to the current network environment;
Step S106, network equipment use this transmitted power that business datum is carried out just passing, and use this transmitted power that business datum is retransmitted at least one times.
Pass through said method, network equipment in broadband cluster system has carried out re-transmission at least one times to business datum, make receiving terminal can use for reference more initial data when the business datum that receives is carried out demodulation coding, reduced and received the probability of makeing mistakes, thereby improve the receptivity of receiving terminal, solve the lower problem of terminal receptivity that in the broadband cluster system, co-channel interference causes, reached the effect that improves the terminal receptivity of group system.
Need to prove, the business datum that retransmits in said method, can be identical with the business datum of first biography, can be also just to pass the part of business datum, what for example retransmit is just to pass the key message of business datum, or just passes the index information of business datum, and when number of retransmissions during greater than one time, the business datum that retransmits each time can be not identical yet, as long as it is just passable to reach the effect that helps receiving terminal to improve the reception accuracy.
The problem that the receptivity of the receiving terminal that causes for the co-channel interference that further solves the broadband cluster system minizone reduces, network equipment can also be determined above-mentioned transmitted power jointly according to the open loop power of current network environment and the merging gain of re-transmission business datum, wherein, this transmitted power is lower than the open loop power of current network environment.In this way, make the transmitted power of business datum reduce, thereby reduced the co-channel interference of minizone, further improved the receptivity of receiving terminal.
In order to reduce to greatest extent the co-channel interference of minizone, network equipment can calculate according to the current network environment and guarantee that the eMBMS channel just passes the coverage cell required open loop power P0 in edge; Calculate to retransmit according to the current network environment and merge gain delta P, for example, first calculate re-transmission under different scenes merge gain delta P0, Δ P1, Δ P2 ..., Δ PN, wherein Δ P0 is to the respectively corresponding scene label 0 to scene label N of Δ PN, and then according to the current network environment, obtain re-transmission corresponding to this scene and merge gain delta P=Δ Pi (wherein, i is the current scene label); Then merge gain delta P according to the above-mentioned open loop power P0 that calculates and re-transmission, above-mentioned transmitted power P1 is set to P1=P0-Δ P.
In said method, retransmitting business datum can use the channel that just passes to send, but in order further to improve the receptivity of receiving terminal, network equipment can to first biography business datum use first deliver a letter and retransmit the retransfer channel that business datum uses be configured respectively, the mode of this configurating channel facilitates receiving terminal that present technique business datum sending method and original sending method are distinguished.
For the ease of to just delivering a letter and the management of retransfer channel, and facilitate receiving terminal that first biography data and data retransmission are distinguished, to just delivering a letter and retransfer channel when configuring respectively, network equipment can be by expanding the corresponding cell of just delivering a letter, and the mode that configures retransfer channel with the cell after expansion configures above-mentioned just delivering a letter and retransfer channel.
Specifically be directed to the first corresponding cell of delivering a letter of expansion under the 3GPP agreement, network equipment can expand to 0-15 by 0-7 with the span of radio frames allocation offsets value, namely expand in 3GPP TS 36.331 agreements radioframeAllocationOffset cell value under MBSFN-SubframeConfiginformation element, have integer value 0～7 to expand to integer value 0～15 value of this field.Value after cell and expansion is as shown in table 1.Correspondingly, network equipment is got the value greater than n8 to radio frames assignment period value the time, and namely radioframeAllocationPeriod field value requires greater than n8, for example, and n16, n32.
Table 1
Wherein, value 0-7 correspondence is just delivered a letter, the corresponding retransfer channel of value 8-15.Just deliver a letter as shown in table 2 below with the corresponding relation of extended channel.
Table 2
| RadioframeAllocationOffset just delivers a letter | Retransfer channel radioframeAllocationOffset |
| 0 | 8 |
| 1 | 9 |
| 2 | 10 |
| 3 | 11 |
| 4 | 12 |
| 5 | 13 |
| 6 | 14 |
| 7 | 15 |
Configuration is just delivered a letter and retransfer channel by the way, when network sends the eMBMS business datum, just pass business datum except sending, can also send one time simultaneously data retransmission, retransmit by utilization and merge gain, to realize reducing transmitted power, reduce the phase mutual interference, thereby improve the purpose of the receptivity of receiving terminal.
Corresponding to above-mentioned business datum sending method based on eMBMS, the present embodiment also provides a kind of business datum method of reseptance based on eMBMS, Fig. 2 is the flow chart based on the business datum method of reseptance of eMBMS according to the embodiment of the present invention, and as shown in Figure 2, the method comprises the steps:
Step S202, terminal receives the business datum that network equipment just passes;
Step S204, whether the above-mentioned business datum that just passes of this terminal judges is correct, if the determination result is NO, execution in step S206; If judgment result is that to be execution in step S210;
Step S206, this terminal receives the business datum that network equipment retransmits;
Step S208, this terminal merges decoding according to the above-mentioned business datum that just passes business datum and above-mentioned re-transmission.
Step S210 carries out subsequent treatment according to existing mode.
Pass through said method, terminal (being above-mentioned receiving terminal) receives first demodulation after the first biography business datum that above-mentioned network equipment sends, decoding just passes data, if receive correct, can not receive data retransmission, thereby reduce as much as possible taking of system resource under the condition that guarantees receptivity, can need not extra expense so that be in the terminal of center of housing estate position in addition, guarantee the stand-by time of terminal; And for the user who is in cell edge, if find during to first biography business datum decoding to make mistakes, go again to receive the business datum of re-transmission, then the business datum of demodulation re-transmission, and first biography business datum and re-transmission business datum are merged decoding, can further promote receptivity like this.Solve the problem of the terminal receptivity reduction that in the broadband cluster system, co-channel interference causes, reached the effect that improves the terminal receptivity of group system.
Need to prove, the processing method that re-transmission mentioned above merges adopts coding, the decoded mode that in agreement, 3GPP TS 36.212 the 5th chapter is described to process.
Based on said method, the present embodiment also provides a kind of network equipment, and this network equipment can be base station etc.Fig. 3 is the structured flowchart according to the first network equipment of the embodiment of the present invention, and as shown in Figure 3, this equipment comprises: send determination module 32, power determination module 34 and sending module 36.Wherein, send determination module 32, be used for determining to exist the business datum of down link to be sent; Power determination module 34 is connected with transmission determination module 32, is used for determining transmitted power according to the current network environment; Sending module 36 is connected with power determination module 34 with transmission determination module 32, is used for using the transmitted power that power determination module 34 is determined to carry out just biography to above-mentioned business datum, and uses this transmitted power that above-mentioned business datum is retransmitted at least one times.
Above-mentioned network equipment is by carrying out re-transmission at least one times to business datum, make receiving terminal can use for reference more initial data when the business datum that receives is carried out demodulation coding, reduced and received the probability of makeing mistakes, thereby improve the receptivity of receiving terminal, solve the lower problem of terminal receptivity that in the broadband cluster system, co-channel interference causes, reached the effect that improves the terminal receptivity of group system.
Fig. 4 is the structured flowchart according to the second network equipment of the embodiment of the present invention, as shown in Figure 4, on the basis of above-mentioned Fig. 3, above-mentioned power determination module 34 can comprise: power determination submodule 342, be used for according to the open loop power of current network environment and the merging gain that retransmits business datum, determine above-mentioned transmitted power, wherein, this transmitted power is lower than the open loop power of current network environment.
Fig. 5 is the structured flowchart according to the third network equipment of the embodiment of the present invention, as shown in Figure 5, on the basis of above-mentioned Fig. 4, above-mentioned power determination submodule 342 can comprise: open loop power computing unit 3422 is used for calculating assurance eMBMS channel according to the current network environment and just passes the required open loop power in coverage cell edge; Gain computing unit 3424 is connected with open loop power computing unit 3422, is used for calculating to retransmit according to the current network environment merging gain; Setting unit 3426 is connected with gain computing unit 3424 with open loop power computing unit 3422, and being used for arranging above-mentioned transmitted power is that the open loop power that open loop power computing unit 3422 calculates deducts the re-transmission merging gain that gain computing unit 3424 calculates.
Fig. 6 is the structured flowchart according to the 4th kind of network equipment of the embodiment of the present invention, as shown in Figure 6, on the basis of above-mentioned Fig. 3, the said equipment can also comprise: configuration module 62, be connected with sending module 36, be used to business datum to configure respectively the first retransfer channel of delivering a letter and retransmitting business datum that just passes business datum.
Fig. 7 is the structured flowchart according to the 5th kind of network equipment of the embodiment of the present invention, and as shown in Figure 7, on the basis of above-mentioned Fig. 6, above-mentioned configuration module 62 can comprise: expansion submodule 622 is used for the first corresponding cell of delivering a letter of expansion; Configuration submodule 624 is connected with expansion submodule 622, is used for using the cell configuration retransfer channel of expansion submodule 622 expansions.
Fig. 8 is the structured flowchart according to the 6th kind of network equipment of the embodiment of the present invention, as shown in Figure 8, on the basis of above-mentioned Fig. 7, above-mentioned expansion submodule 622 can comprise: expanding element 6222, be used for the span of radio frames allocation offsets value is expanded to 0-15 by 0-7, wherein, value 0-7 correspondence is just delivered a letter, the corresponding retransfer channel of value 8-15.
Based on said method, the present embodiment also provides a kind of terminal, Fig. 9 is the structured flowchart according to the terminal of the embodiment of the present invention, and as shown in Figure 9, this terminal comprises: first transmitting/receiving module 92, judge module 94, re-transmission receiver module 96 and merging decoding module 98.Wherein, first transmitting/receiving module 92 is used for receiving the business datum that network equipment just passes; Whether judge module 94 is connected with first transmitting/receiving module 92, correct for the business datum that judges the first biography that first transmitting/receiving module 92 receives; Retransmit receiver module 96, be connected with judge module 94, be used at judge module 94 receiving the business datum of network equipment re-transmission when the determination result is NO; Merge decoding module 98, with first transmitting/receiving module 92 with retransmit receiver module 96 and be connected, the business datum that is used for the re-transmission that the first biography business datum that receives according to first transmitting/receiving module 92 and re-transmission receiver module 96 receive merges decoding.
After above-mentioned terminal receives the first biography business datum that above-mentioned network equipment sends, first demodulation, decoding just pass data, if receive correct, can not receive data retransmission, thereby reduce as much as possible taking of system resource under the condition that guarantees receptivity, can need not extra expense so that be in the terminal of center of housing estate position in addition, guarantee the stand-by time of terminal; And for the user who is in cell edge, if find during to first biography business datum decoding to make mistakes, go again to receive the business datum of re-transmission, then the business datum of demodulation re-transmission, and first biography business datum and re-transmission business datum are merged decoding, can further promote receptivity like this.Solve the lower problem of terminal receptivity that in the broadband cluster system, co-channel interference causes, reached the effect that improves the terminal receptivity of group system.
Based on above-mentioned network equipment and terminal, the present embodiment also provides a kind of business data transmission system based on eMBMS, Figure 10 is the structured flowchart based on the business data transmission system of eMBMS according to the embodiment of the present invention, as shown in figure 10, this system comprises network equipment 30 and terminal 90, and network equipment 30 is connected with terminal 90.Wherein, this network equipment 30 can be the network equipment in above-mentioned Fig. 3 to Fig. 8, and take the network equipment of Fig. 3 as example, in addition, this terminal 90 can be the terminal in above-mentioned Fig. 9 here.
pass through said system, network equipment in broadband cluster system has carried out re-transmission at least one times to business datum, make receiving terminal can use for reference more initial data when the business datum that receives is carried out demodulation coding, reduced and received the probability of makeing mistakes, thereby improve the receptivity of receiving terminal, in addition, above-mentioned terminal receives first demodulation after the first biography business datum that above-mentioned network equipment sends, decoding just passes data, if receive correct, can not receive data retransmission, thereby reduce as much as possible taking of system resource under the condition that guarantees receptivity, can need not extra expense so that be in the terminal of center of housing estate position in addition, guarantee the stand-by time of terminal, and for the user who is in cell edge, if find during to first biography business datum decoding to make mistakes, go again to receive the business datum of re-transmission, then the business datum of demodulation re-transmission, and first biography business datum and re-transmission business datum are merged decoding, can further promote receptivity like this.Solve the lower problem of terminal receptivity that in the broadband cluster system, co-channel interference causes, reached the effect that improves the terminal receptivity of group system.
Native system is applicable to all based on the cluster downlink transfer of eMBMS, and it effectively is reduced to and covers the required transmitting power of edge customer, has reduced presence of intercell interference, improves the performance of group system.Take into account simultaneously Cell Center User and edge customer, guaranteed the stand-by time of central user, taken into account simultaneously the receptivity of edge customer.
Describe below in conjunction with a preferred embodiment, the preferred embodiment combines above-described embodiment and preferred implementation.
Embodiment one
This preferred embodiment is all example with the business datum that retransmits mutually with just passing business datum, and above-mentioned business datum sending, receiving method, Apparatus and system based on eMBMS are specifically described.The present embodiment relates to network side and end side, has proposed a kind of downlink traffic data transmission method of the group system based on eMBMS, and the method is applicable to broadband cluster system.The below describes implementation step from network side and end side respectively.
Network side as shown in figure 11 (being above-mentioned network equipment) sends the process flow figure of data, and the method comprises the steps:
Step S111: network side configuration eMBMS channel configures retransfer channel according to the mode of above describing simultaneously.
Step S112: network side calculate to guarantee that business datum that the eMBMS channel just passes can the coverage cell required open loop power P0 in edge, and this open loop power P0 can calculate according to coverage when the network planning.
Step S113: the re-transmission under the different scenes of network side simulation calculation merge gain delta P0, Δ P1, Δ P2 ..., Δ PN, wherein Δ P0 is to Δ PN corresponding scene label 0 to scene label N respectively.
Step S114: according to the scene of reality, obtain re-transmission corresponding to this scene and merge gain delta P=Δ Pi (i is the current scene label), network side recomputates the rate of just passing on Gong (namely above transmitted power) P1=P0-Δ P according to the open loop power P0 that obtains in Δ P and step S112.
Step S115: network side sends at the eMBMS channel with power P 1 when scheduling and just passes business datum.
Step S116: network side sends with power P 1 on the retransfer channel that configures simultaneously and retransmits business datum.
Step S117: flow process finishes.
The process flow figure of end side receive data as shown in figure 12, the method comprises the steps:
Step S121: end side reads the configuring condition of eMBMS channel, and calculates and preserve the position of retransfer channel according to configuration mode above.
Step S122: end side reception eMBMS just passes business datum and carries out demodulation, decoding, if response results is correct (ACK), execution in step S124; If response results is wrong (NACK) execution in step S123;
Step S123: receive at above-mentioned retransfer channel and retransmit business datum, and will just pass business datum and retransmit business datum and retransmit merging decoding, successfully decoded rear execution in step S124.
Step S124: flow process finishes.
This preferred embodiment has proposed a kind of wideband digital trunked communication system field of being applied to, be particularly useful for the downlink power control method based on the mobile broadband trunked communication system of eMBMS, pass through the method, solve the lower problem of terminal receptivity that in the broadband cluster system, co-channel interference causes, reached the effect that reduces the minizone co-channel interference, improves the terminal receptivity of group system.
Can find out in sum, the present invention has carried out re-transmission at least one times by the network equipment in broadband cluster system to business datum, make receiving terminal can use for reference more initial data when the business datum that receives is carried out demodulation coding, reduced and received the probability of makeing mistakes, thereby improve the receptivity of receiving terminal, solve the lower problem of terminal receptivity that in the broadband cluster system, co-channel interference causes, reached the effect that reduces the minizone co-channel interference, improves the terminal receptivity of group system.
obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (15)
1. business datum sending method based on enhanced multimedia broadcast or multicast eMBMS is characterized in that comprising:
Network equipment determines to exist the business datum of down link to be sent;
Described network equipment is determined transmitted power according to the current network environment;
Described network equipment uses described transmitted power that described business datum is carried out just passing, and uses described transmitted power that described business datum is retransmitted at least one times.
2. method according to claim 1, is characterized in that, described network equipment determines that according to the current network environment described transmitted power comprises:
Described network equipment is determined described transmitted power according to the open loop power of current network environment and the merging gain that retransmits described business datum, and wherein, described transmitted power is lower than the open loop power of described current network environment.
3. method according to claim 2, is characterized in that, described network equipment determines that according to the open loop power of current network environment and the merging gain that retransmits described business datum described transmitted power comprises:
Described network equipment calculates according to the current network environment and guarantees that the eMBMS channel just passes the required open loop power in coverage cell edge;
Described network equipment calculates to retransmit according to the current network environment and merges gain;
It is that described open loop power deducts described re-transmission merging gain that described network equipment arranges described transmitted power.
4. method according to claim 1, is characterized in that, the described transmitted power of described network equipment use also comprises before described business datum is carried out just passing:
Described network equipment is that described business datum configures respectively the first retransfer channel of delivering a letter and retransmitting described business datum that just passes described business datum.
5. method according to claim 4, is characterized in that, described network equipment is that first the delivering a letter that passes described business datum at the beginning of described business datum configures respectively comprises with the retransfer channel that retransmits described business datum:
The described corresponding cell of just delivering a letter of described network equipment expansion uses the described retransfer channel of described cell configuration after expanding.
6. method according to claim 5, is characterized in that, the described corresponding cell of just delivering a letter of described network equipment expansion comprises:
Described network equipment expands to 0-15 with the span of radio frames allocation offsets value by 0-7, and wherein, value 0-7 is corresponding described just to deliver a letter, the corresponding described retransfer channel of value 8-15.
7. business datum method of reseptance based on enhanced multimedia broadcast or multicast eMBMS is characterized in that comprising:
Terminal receives the business datum that network equipment just passes;
Whether the described business datum that just passes of described terminal judges is correct;
If not, described terminal receives the described business datum that described network equipment retransmits;
Described terminal merges decoding according to the described business datum that just passes and the business datum of described re-transmission.
8. network equipment is characterized in that comprising:
Send determination module, be used for determining to exist the business datum of down link to be sent;
The power determination module is used for determining transmitted power according to the current network environment;
Sending module is used for using the described transmitted power that described power determination module is determined that described business datum is carried out just passing, and uses described transmitted power that described business datum is retransmitted at least one times.
9. equipment according to claim 8, is characterized in that, described power determination module comprises:
The power determination submodule is used for determining described transmitted power according to the open loop power of current network environment and the merging gain that retransmits described business datum that wherein, described transmitted power is lower than the open loop power of current network environment.
10. equipment according to claim 9, is characterized in that, described power determination submodule comprises:
The open loop power computing unit is used for calculating assurance eMBMS channel according to the current network environment and just passes the required open loop power in coverage cell edge;
The gain computing unit is used for calculating to retransmit according to the current network environment merging gain;
Setting unit, being used for arranging described transmitted power is that the described open loop power that described open loop power computing unit calculates deducts the described re-transmission merging gain that described gain computing unit calculates.
11. equipment according to claim 8 is characterized in that, described equipment also comprises:
Configuration module is used to described business datum is configured respectively the first retransfer channel of delivering a letter and retransmitting described business datum that just passes described business datum.
12. equipment according to claim 11 is characterized in that, described configuration module comprises:
The expansion submodule is used for expanding the described corresponding cell of just delivering a letter;
The configuration submodule is used for using the described cell of described expansion submodule expansion to configure described retransfer channel.
13. equipment according to claim 12 is characterized in that, described expansion submodule comprises:
Expanding element is used for the span of radio frames allocation offsets value is expanded to 0-15 by 0-7, and wherein, value 0-7 is corresponding described just to deliver a letter, the corresponding described retransfer channel of value 8-15.
14. a terminal is characterized in that comprising:
Just transmitting/receiving module, be used for receiving the business datum that network equipment just passes;
Judge module is for judging whether the described business datum that just passes that described just transmitting/receiving module receives is correct;
Retransmit receiver module, be used at described judge module receiving the described business datum of described network equipment re-transmission when the determination result is NO;
Merge decoding module, be used for merging decoding according to the described business datum that just passes the described re-transmission that business datum and described re-transmission receiver module receive that described just transmitting/receiving module receives.
15. the business data transmission system based on enhanced multimedia broadcast or multicast eMBMS is characterized in that, comprises the described network equipment of any one in claim 8 to 13, also comprises the described terminal of claim 14.
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