CN101291193B - Method and base station for retransmitting packets - Google Patents
Method and base station for retransmitting packets Download PDFInfo
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Abstract
The invention discloses a method and a base station for retransmitting a data packet. The method comprises the following steps of: determining a user proportion transmitting the NACK signal receiving a negative acknowledgement NACK signal from a user terminal UE, wherein the user proportion is a ratio of the number of UE transmitting the NACK signal and the number of all UE in the cell; and retransmitting the data packet to the user transmitting the NACK signal when the data packet is required to be retransmitted according to the user proportion transmitting the NACK signal, thereby guaranteeing the reliability of feedback. Furthermore, before acquiring the ratio of the users transmitting the NACK signal occupying the total number of users in the cell, the method performs equal probability grouping to the UE through a random number; after grouping, the number of the UE requiring transmitting the NACK signal in each group is equal, thereby reducing severe power peak effect occurring in a feedback channel.
Description
Technical field
The present invention relates to multi-medium multi-packet broadcasting/multicasting technology, espespecially a kind of method and base station at the middle retransmission data bag of multi-medium multi-packet broadcasting/multicast service (MBMS, Multimedia Broadcast/Multicast Service).
Background technology
Realize that on OFDM (OFDM, Orthogonal Frequency Division Multiplexing) multi-transceiver technology the MBMS business is one of important service in the Long Term Evolution (LTE, Long Time Evolution).MBMS refers to that mainly network sends to a plurality of recipients in the network with same multi-medium data.
Current, people no longer are satisfied with phone and messaging service to the demand of mobile communication, and along with the fast development of internet (Internet), a large amount of mobile multi-media services emerge.Wherein, some mobile multi-media services require a plurality of users can receive simultaneously identical data, such as video request program, television broadcasting, video conference, online education, interactive game etc.These mobile multi-media services are compared with general data service, have the characteristics such as data volume is large, longer duration, delay sensitive.And present Internet protocol (IP) multicast and broadcast technology are only applicable to wired IP communication network, be not suitable for mobile communications network, because mobile communications network has specific network configuration, functional entity and wave point, these are all different from the wire communication IP network.
In order to effectively utilize the mobile communications network resource, 3G (Third Generation) Moblie global standards tissue (3GPP) has proposed the MBMS business of mobile communications network, thereby in mobile communications network, provide a data source to send the point-to-multipoint service of data to a plurality of users, realized that Internet resources are shared, improved the utilance of Internet resources, the interface resource of especially eating dishes without rice or wine.The MBMS technology that 3GPP proposes can not only realize the classes of messages multicast/broadcast of plain text low rate, and can also realize the multicast/broadcast of high-speed multimedia business, and this has complied with the trend of following Mobile data development undoubtedly.
In mobile communications network, because it is different that the edge zone that is positioned at the residential quarter and user's receptivity from the central area of base station node B close to are disturbed degree, cause the user who has not receive data, and these users that do not receive data can be by sending Negative Acknowledgement (NACK, NegativeAcknowledgement) signal with request base station retransmission data bag to the base station.
All UE in the MBMS business can produce an at random feedback factor in order to access or respond counting.Fig. 1 is in the MBMS residential quarter, when can not receiving packet, the user sends the schematic diagram of NACK signal, as shown in Figure 1, base station mode with point-to-multipoint in the residential quarter is professional to all user terminals (UE) MBMS transmission in the residential quarter, comprise three users of UE1, UE2 and UE3 shown in supposing in the residential quarter, wherein UE1 and UE2 normally do not receive the MBMS business data packet that the base station sends.The method of existing retransmission data bag is:
In existing retransmission data machine contracting system, network is high-rise to arrange the uplink feedback factor (or being called the access factor) such as radio network controller (RNC), send to UE by broadcast, UE preserves this uplink feedback factor, and when self does not receive the MBMS business datum, the uplink feedback factor of feedback factor and preservation more at random, feedback factor sends the NACK signal less than the UE access up channel of the uplink feedback factor to the base station at random, NodeB calculates power and the P of the UE that sends the NACK signal, and relatively this power and P and the power threshold that sets in advance, if the power that calculates and P are greater than power threshold, then feed back with realization to the UE retransmission data packet may that sends the NACK signal, otherwise packet is not retransmitted.
Have now and determine whether that the condition of retransmission data bag is power and P, the power that normally calculates and P then feed back with realization to the UE retransmission data packet may that sends the NACK signal greater than power threshold, certainly, if when running into the situation such as channel block, also may Time-delayed Feedback or do not retransmit etc.
The present inventor finds, according to the existing method that realizes data packet retransmission, when the quantity of the UE that sends the NACK signal is a lot, because all UE that need to send NACK send NACK simultaneously, serious power peak effect can appear in feedback channel, shown in Fig. 2 a, Fig. 2 a is UE sends schematic diagram from NACK signal emergent power peak effect to NodeB.In this case, can increase channel burdens, cause the unnecessary wasting of resources;
Fig. 2 b is that UE sends the too small schematic diagram of NACK signal emergent power to NodeB, shown in Fig. 2 b, when needs send the negligible amounts of UE of NACK signal, then can be owing to the access factor so that UE sends the quantity minimizing of NACK signal, so that the power that NodeB detects and P are lower than the power threshold that sets in advance, packet is not retransmitted, and needs NodeB retransmission data bag and be actually UE this moment.Like this, cause undoubtedly the false dismissal phenomenon, reduced the reliability of retransmission data bag.Especially total UE quantity is just few in the residential quarter, if the quantity of UE that needs to send the NACK signal is utilized existing method again in the few situation, is the normal retransmission data bag of UE that is difficult to guarantee needs transmission NACK signal.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to provide a kind of method of retransmission data bag, can improve the reliability of feedback.
Another purpose of the embodiment of the invention is to provide a kind of base station of retransmission data bag, can guarantee the reliability of feeding back.
For achieving the above object, the technical scheme of the embodiment of the invention specifically is achieved in that
A kind of method that realizes data packet retransmission, the method comprises:
Reception is from the Negative Acknowledgement NACK signal of user terminal UE;
Obtain the ratio that participates in the UE of calibration in calibration of power value and the residential quarter; Send in the residential quarter that calculating receives the NACK signal UE power and;
According to described calibration of power value, the ratio of UE that participates in calibration and power and, determine to send user's ratio of NACK signal, described user's ratio is the ratio of all UE numbers in the UE number that sends the NACK signal and this residential quarter;
When determining needs retransmission data bag according to user's ratio of described transmission NACK signal, to user's retransmission data bag of described transmission NACK signal.
A kind of base station, this base station comprises at least:
Receiver module is used for receiving the NACK signal from user terminal UE;
Send user's ratio acquisition module of NACK signal, be used for determining user's ratio of described transmission NACK signal, wherein, user's ratio acquisition module of described transmission NACK signal comprises: ratio acquisition module and power and the acquisition module of the UE of calibration of power value acquisition module, participation calibration; Wherein,
Calibration of power value acquisition module is used for determining calibration of power value according to feedback factor at random;
Participate in the ratio acquisition module of the UE of calibration, be used for obtaining the ratio that residential quarter that UE determines according to feedback factor at random participates in the UE of calibration;
Power and acquisition module, be used for to calculate the UE that the residential quarter that receives sends the NACK signal power and;
User's ratio acquisition module of described transmission NACK signal is according to the ratio of the UE that participates in calibration in the calibration of power value that obtains, the residential quarter and user's ratio of power and the definite NACK of transmission signal;
Judge module is used for user's ratio according to described transmission NACK signal and whether determines the retransmission data bag;
Sending module is used for when determining to need the retransmission data bag, to user's retransmission data bag of described transmission NACK signal.
As seen from the above technical solution, the embodiment of the invention does not receive the ratio that user that packets need retransmits accounts for total number of users by obtaining, and whether determines retransmission data packet may, has improved the reliability of retransmission data bag.
Description of drawings
Fig. 1 is the schematic diagram that the user sends the NACK signal in the MBMS residential quarter;
Fig. 2 a is UE sends schematic diagram from NACK signal emergent power peak effect to NodeB;
Fig. 2 b is that UE sends the too small schematic diagram of NACK signal emergent power to NodeB;
Fig. 3 is the flow chart of the inventive method embodiment;
Fig. 4 is the flow chart of preferred embodiment of the present invention;
Fig. 5 is according to the power adjustment of the embodiment of the invention and control curve synoptic diagram;
Fig. 6 is the base station composition structural representation according to the embodiment of the invention.
Embodiment
In some embodiments of the invention, receive the Negative Acknowledgement NACK signal from user terminal UE; Determine user's ratio of described transmission NACK signal, described user's ratio is the ratio of all UE numbers in the UE number that sends the NACK signal and this residential quarter; When determining needs retransmission data bag according to user's ratio of described transmission NACK signal, to user's retransmission data bag of described transmission NACK signal.
For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 3 is the flow chart of the inventive method embodiment, as shown in Figure 3, may further comprise the steps according to the method for the embodiment of the invention:
Step 300: the ratio m that determines to participate in calibration of power value Q and the residential quarter UE of calibration.
In the present embodiment, network high level for example RNC has arranged the uplink feedback factor, and sends to all UE in the MBMS business by broadcast, and each UE has preserved this uplink feedback factor.
If the at random feedback factor that UE produces, determines then that this UE for participating in the UE of feedback calibration, namely participates in the UE of rated output calibration value Q less than this uplink feedback factor; If perhaps the at random feedback factor of UE generation is greater than this uplink feedback factor, determine that then this UE for participating in the UE of feedback calibration, namely participates in the UE of rated output calibration value Q.Need to prove, decision condition adopt greater than, or less than being preseted by system, also can adopt as more than or equal to, less than or equal to etc. decision condition.
The power sum when if the UE that calculating participates in calibrating all sends the NACK signal to the base station, and determine that this power sum is calibration of power value Q.
Because the number of all UE in the residential quarter in the MBMS business is that system knows, the number that participates in the UE of calibration also is to add up easily, so, the ratio of the number of the number of the UE of participation calibration and all UE in the MBMS business is the ratio m of the UE that participates in calibration.
Step 301: the power and the P that send the UE of NACK signal in the calculation plot.
Power and P are that the base station receives, and send the power sum of the UE of NACK signal in the residential quarter, and the implementation method of this step and existing method are in full accord, no longer repeat here.
Need to prove, do not limit strict execution sequence between step 300 and the step 301.
Step 302: determine that according to the calibration of power value Q, the ratio m that obtain and power and P the UE of the actual NACK of transmission signal in the residential quarter accounts for the ratio N of total UE number, and at ratio N more than or equal to default when retransmitting threshold value, the retransmission data bag.
Draw easily the corresponding relation shown in the formula (1),
Can obtain a corresponding relative scale N by power and P, ratio N is signifying that the UE of the transmission NACK signal that the base station receives accounts for the ratio of UE sum in the residential quarter, that is to say, the base station by to the power that receives and calculating, the UE that just can obtain to send the NACK signal accounts for the ratio of total UE number, whether determines thus the retransmission data bag.The user's ratio N that sends the NACK signal according to reality determines whether that the method that retransmits can be based on prior art, normally, at user's ratio N of the transmission NACK signal that calculates more than or equal to default when retransmitting thresholding, then to the UE retransmission data packet may that sends the NACK signal to realize feedback.
Herein, the ratio N that also UE that sends the NACK signal can be accounted for total UE number is called user's ratio N of actual transmission NACK signal, with Q or
Be called experience power.
The acquisition that can get N according to formula (1) can obtain by formula (2),
Be that rated output and P and ratio m are long-pending, the more long-pending value of gained obtained user's ratio N of actual transmission NACK signal divided by calibration of power value Q.
Be easy to find out from the described method of Fig. 3, even UE quantity total in the residential quarter is just few, if need to send the quantity of UE of NACK signal again in the few situation, also can obtain the ratio that the user who does not receive the packets need re-transmission accounts for total number of users, and then determine whether retransmission data packet may according to this ratio, thereby improved the reliability of the normal retransmission data bag of UE that needs to send the NACK signal.
Need to prove, in embodiments of the present invention, if when running into the situation such as channel block, also may Time-delayed Feedback or do not retransmit etc.
Further, the embodiment of the invention can also comprise before the method in order to reduce the serious power peak effect of appearance in feedback channel: all UE in the MBMS business are carried out the equiprobability grouping, specific implementation can for:
Can utilizing at random, feedback factor divides into groups to all UE in the MBMS business as the grouping random number.In the present embodiment, feedback factor is the numerical value between 0～1 at random, need to be divided into K group, then has: the grouping random digit in
UE in the scope is dispensed on the k group, and to account for the ratio of all UE in the MBMS business be m to the number of UE in every group.
Wherein, the grouping random number can also be the random numbers such as the uplink feedback factor of above carrying, and the uplink feedback factor is default, and system can change according to the ascending resource situation.
Divide into groups and can be conducive to the accuracy of reference power so that the UE in each group spatially is evenly distributed by above-mentioned grouping random number, the number that needs simultaneously to send the UE of NACK signal in each group also is equally distributed.
Below in conjunction with an embodiment, after description is carried out the equiprobability grouping to all UE in the MBMS business, realize the detailed process of the method for retransmission data bag.
Fig. 4 is the flow chart of preferred embodiment of the present invention, as shown in Figure 4, may further comprise the steps:
Step 400: utilizing at random, feedback factor carries out the equiprobability grouping as the grouping random number to all UE in the MBMS business.
Here hypothesis utilizes at random feedback factor as the grouping random number all UE in the MBMS business to be divided into groups, and the existing in detail record of specific implementation preamble no longer repeats here.The present embodiment illustrated is as follows:
Such as all UE in the residential quarter are divided into 5 groups according to feedback factor at random, can get according to formula (3): the UE of feedback factor between 0～0.2 is in first group at random, the UE of feedback factor between 0.2～0.4 is in second group at random, the UE of feedback factor between 0.4～0.6 is in the 3rd group at random, the UE of feedback factor between 0.6～0.8 is in the 4th group at random, the UE of feedback factor between 0.8～1 is in the 5th group at random, the number of UE accounts for 20% of UE sum in the residential quarter in obvious every group, and every group UE number randomness all is the same.
Step 401: calculate power sum when all UE send the NACK signals to the base station in any grouping as calibration of power value Q, and account for the ratio of the number of all UE in the MBMS business as the ratio m that participates in the UE of calibration in the residential quarter with the number of UE in every group.
Obtain the number of UE in every group in the step 400 and account for 20% of UE sum in the residential quarter, this value namely in every group the number of UE account for the ratio of the number of all UE in the MBMS business, be the ratio m that participates in the UE of calibration in the residential quarter.
Only allow first group of UE send the NACK signal in the present embodiment, namely only have 20% UE of sum no matter whether needing to retransmit all sends the NACK signal, this moment, to obtain calibration of power value be Q in the base station.
Because UE can affect the received power of base station apart from the distance of base station, therefore, it is roughly consistent that the NACK signal that sends for the UE that reaches diverse location arrives the power attenuation of base station, can adopt the open loop power control method of RNC, obtains the power of assembly average as calibration of power value Q.The realization of open loop power control belongs to technology as well known to those skilled in the art, repeats no more here.
Step 402: by needing to send the UE of NACK signal to power and the P of base station transmission NACK signal in cumulative each grouping of component time slot.
Power and P be in the residential quarter that receives, base station the actual UE power that sends the NACK signal to the base station and, for fear of the power peak effect, can respectively organize the UE time-division slot sends, each time slot has one group of anti-transmission of UE, send such as first group of UE of first time slot, second group of UE of second time slot sends etc., and the base station is tired and write down received power in each sending time slots, after the UE of all groups is sent, all power additions are obtained power and P.Therefore, send by the grouping of random number equiprobability and by the component time slot, effectively avoided the power peak effect.
Preferably, for fear of power hump or too small, the number that can as far as possible guarantee UE in every group is not too much or very little, concrete number can determine flexibly according to actual conditions, such as: if the sum of UE roughly is about 500 in residential quarter, needs so to be divided into 10～15 groups and be advisable; And the UE sum of a residential quarter probably is about 100, is divided into so about 3 groups just passablely, according to the randomness principle, is no more than 100 as good take the UE number.In order to reach this purpose, system can obtain UE number roughly in the residential quarter by existing counting message.
Step 403: determine to send user's ratio N of NACK signal according to the calibration of power value Q, the ratio m that obtain and power and P, and at the user's ratio N that sends the NACK signal more than or equal to default when retransmitting threshold value, the retransmission data bag.
In the present embodiment, because be divided into 5 groups, thus m=20% here, so this residential quarter that obtains sends user's ratio of NACK signal
As seen from the above technical solution, the present invention is by obtaining the power that sends the NACK signal and corresponding not receiving the ratio that user that packets need retransmits accounts for total number of users, whether determines retransmission data packet may, guaranteed the reliability of retransmission data bag.
Further, the inventive method is before the user who obtains the needs re-transmission accounts for the ratio of total number of users in the residential quarter, UE is carried out the equiprobability grouping by random number, like this, the probability that each UE is assigned to each group equates, and is corresponding, need the UE that sends the NACK signal also to be assigned to equiprobably in each group, namely from probability, after grouping, the UE number that needs in each group to send the NACK signal equates.By equiprobability grouping, reduced the possibility of the serious power peak effect of in feedback channel appearance.
Further, in some cases, even send by the component time slot, one group of UE sends also may emergent power excessive or too small, the present invention is by coming power ratio control excessive or too small to each group Modulating Power, power adjustment and control be by the network high level for example RNC realize, lift an example here and illustrate and adjust and the method for control, Fig. 5 is according to the power adjustment of the embodiment of the invention and control curve synoptic diagram, as shown in Figure 5:
Suppose according to formula (2)
Obtain, user's ratio of power and P corresponding transmission NACK signal when being 400dB is 60%, the curve I shown in solid line among Fig. 5.And when realizing FEEDBACK CONTROL according to this feedback probability, when user's ratio of reality transmission NACK signal arrives 30%, power and P have been 400dB, curve II as shown in phantom in Figure 5, like this, power and can reach the higher power when user's ratio that sends the NACK signal when reality reaches 60%, thus cause high power to disturb to other business.Cause high power to disturb for fear of performance number is too high to other business, the present invention RNC on the middle and senior level is according to the corresponding relation of formula (1), when user's ratio of reality transmission NACK signal is 30%, power and P are suitably turned down to some numerical value, 200dB for example, thereby so that when the actual user's ratio that sends the NACK signal reaches 60% power and can not reach a higher power, to reduce interference, economize on resources.
For the method among the invention described above embodiment, user's ratio N of the actual NACK of transmission signal is an estimated value by obtaining after calculating, in order to utilize better user's ratio N of this actual transmission NACK signal, can be further in the base station control user's ratio N of this actual transmission NACK signal, guarantee that the error of user's ratio N of the actual transmission NACK signal that this calculates and default actual value is in setting range.From the relation of formula (1) as seen, the method of control can be by carrying out open loop power control to calibration of power value Q, or the error of user's ratio N of the actual transmission NACK signal that power and P are adjusted and control to guarantee to calculate and actual value is in setting range.
In conjunction with the inventive method, a kind of base station also is provided, Fig. 6 is the composition structural representation of base station embodiment of the present invention, as shown in Figure 6, base station of the present invention comprises at least:
Send user's ratio acquisition module 61 of NACK signal, be used for determining user's ratio of described transmission NACK signal;
Judge module 62 is used for user's ratio according to described transmission NACK signal and whether determines the retransmission data bag;
Sending module 63 is used for when determining to need the retransmission data bag, to user's retransmission data bag of described transmission NACK signal.
Be provided with the repeating transmission threshold value in the described judge module 62, when described user's ratio when retransmitting thresholding, then determines retransmission data packet may more than or equal to default.
User's ratio acquisition module 61 of described transmission NACK signal comprises: ratio acquisition module 601 and power and the acquisition module 602 of the UE of calibration of power value acquisition module 600, participation calibration; Wherein,
Calibration of power value acquisition module 600 is used for determining calibration of power value according to feedback factor at random;
Participate in the ratio acquisition module 601 of the UE of calibration, be used for obtaining the ratio that residential quarter that UE determines according to feedback factor at random participates in the UE of calibration;
Power and acquisition module 602, be used for calculation plot send the NACK signal UE power and;
User's ratio acquisition module 61 of described transmission NACK signal is according to the ratio of the UE that participates in calibration in the calibration of power value that obtains, the residential quarter and user's ratio of power and the definite NACK of transmission signal.
Described base station further comprises: at random feedback factor acquisition module 603 and random packet module 604;
Described at random feedback factor acquisition module 603 is used for obtaining at random feedback factor from UE;
Described random packet module 604, the at random feedback factor that is used for obtaining divides into groups as grouping random number all UE to the MBMS business;
Described calibration of power value acquisition module 600 calculates power sum when all UE send the NACK signals to the base station in any grouping as calibration of power value;
The ratio acquisition module 601 of the UE of described participation calibration accounts for the ratio of the number of all UE in the MBMS business as the ratio that participates in the UE of calibration in the residential quarter with the number of UE in every group.
Described power and acquisition module 602, by the UE that sends the NACK signal in cumulative each grouping of component time slot send to the base station NACK signal power and.
Described calibration of power value acquisition module 600 further is subject to the open loop control of network high level.
Described power and acquisition module 602 further are subject to adjustment and the control of network high level.
This base station further comprises: error adjusting module 605, wherein be preset with the actual value of the user's ratio N that sends the NACK signal, be used in base station sets constantly, user's ratio and the default actual value of the transmission NACK signal that user's ratio acquisition module of more described transmission NACK signal obtains, and when the error of user's ratio of this transmission NACK signal that calculates and actual value exceeds setting range, RNC is to calibration of power value for notice, perhaps power and controlling.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention, for example also can determining to send by other method user's ratio of NACK signal.Therefore, all any modifications of making within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. method that realizes data packet retransmission is characterized in that the method comprises:
Reception is from the Negative Acknowledgement NACK signal of user terminal UE;
Obtain the ratio that participates in the UE of calibration in calibration of power value and the residential quarter; Send in the residential quarter that calculating receives the NACK signal UE power and;
According to described calibration of power value, the ratio of UE that participates in calibration and power and, determine to send user's ratio of NACK signal, described user's ratio is the ratio of all UE numbers in the UE number that sends the NACK signal and this residential quarter;
When determining needs retransmission data bag according to user's ratio of described transmission NACK signal, to user's retransmission data bag of described transmission NACK signal.
2. method according to claim 1, it is characterized in that, when described user's ratio according to sending the NACK signal determines needs retransmission data bag, user's retransmission data bag to described transmission NACK signal comprises: when described user's ratio when retransmitting thresholding, then determines retransmission data packet may more than or equal to default.
3. method according to claim 1, it is characterized in that, user's ratio of described definite transmission NACK signal specifically comprises: calculate described power and with the residential quarter in to participate in the ratio of UE of calibration long-pending, the more long-pending value of gained is obtained sending user's ratio of NACK signal divided by described calibration of power value.
4. method according to claim 1 is characterized in that, before the ratio of the UE that obtains described calibration of power value and participate in calibrating, also comprises:
The network high level is provided with the uplink feedback factor, and is broadcast to all UE in the residential quarter, and each UE preserves the uplink feedback factor that receives; The at random feedback factor that produces at UE determines that this UE is for participating in the UE of calibration during less than the uplink feedback factor;
Perhaps, the network high level is provided with the uplink feedback factor, and is broadcast to all UE in the residential quarter, and each UE preserves the uplink feedback factor that receives; The at random feedback factor that produces at UE determines that this UE is for participating in the UE of calibration during greater than the uplink feedback factor.
5. method according to claim 1 is characterized in that, before the ratio of the UE that obtains described calibration of power value and participate in calibrating, also comprises: utilize the grouping random number that all UE in the residential quarter are divided into groups;
Described grouping random number is at random feedback factor or the uplink feedback factor.
6. method according to claim 5 is characterized in that, described utilization grouping random number divides into groups to comprise to all UE in the residential quarter: described grouping random digit in
UE in the scope is dispensed on the k group, and wherein k represents to organize number, and K represents the sum of the group that need to be divided into.
7. method according to claim 5 is characterized in that, described calibration of power value is: the power sum when all UE sends the NACK signal to the base station in any one grouping in the described grouping;
The ratio of the UE of described participation calibration is: the number of UE and the ratio of all the UE numbers in the residential quarter in described any one grouping;
Described power and be time-division slot to the power of the cumulative gained of power of the UE that sends the NACK signal in each grouping.
8. method according to claim 5 is characterized in that, the method further comprises: in the described grouping each the group power and adjust and control.
9. method according to claim 1 is characterized in that, the method further comprises: described calibration of power value is carried out open loop power control.
10. method according to claim 1, it is characterized in that, the method further comprises: by controlling described calibration of power value, perhaps power and control user's ratio of described transmission NACK signal guarantees that the error of user's ratio of the transmission NACK signal that this calculates and default actual value is in setting range.
11. a base station is characterized in that, this base station comprises at least:
Receiver module is used for receiving the NACK signal from user terminal UE;
Send user's ratio acquisition module of NACK signal, be used for determining user's ratio of described transmission NACK signal, wherein, user's ratio acquisition module of described transmission NACK signal comprises: ratio acquisition module and power and the acquisition module of the UE of calibration of power value acquisition module, participation calibration; Wherein,
Calibration of power value acquisition module is used for determining calibration of power value according to feedback factor at random;
Participate in the ratio acquisition module of the UE of calibration, be used for obtaining the ratio that residential quarter that UE determines according to feedback factor at random participates in the UE of calibration;
Power and acquisition module, be used for to calculate the UE that the residential quarter that receives sends the NACK signal power and;
User's ratio acquisition module of described transmission NACK signal is according to the ratio of the UE that participates in calibration in the calibration of power value that obtains, the residential quarter and user's ratio of power and the definite NACK of transmission signal;
Judge module is used for user's ratio according to described transmission NACK signal and whether determines the retransmission data bag;
Sending module is used for when determining to need the retransmission data bag, to user's retransmission data bag of described transmission NACK signal.
12. base station according to claim 11 is characterized in that, is provided with the repeating transmission threshold value in the described judge module, when described user's ratio when retransmitting thresholding, then determines retransmission data packet may more than or equal to default.
13. base station according to claim 11 is characterized in that, described base station further comprises: at random feedback factor acquisition module and random packet module;
Described at random feedback factor acquisition module is used for obtaining at random feedback factor from UE;
Described random packet module, the at random feedback factor that is used for obtaining divides into groups as grouping random number all UE to the MBMS business;
Described calibration of power value acquisition module calculates power sum when all UE send the NACK signals to the base station in any grouping as calibration of power value;
The ratio acquisition module of the UE of described participation calibration accounts for the ratio of the number of all UE in the MBMS business as the ratio that participates in the UE of calibration in the residential quarter with the number of UE in every group;
Described power and acquisition module, by the UE that needs to send the NACK signal in cumulative each grouping of component time slot send to the base station NACK signal power and.
14. base station according to claim 11 is characterized in that, described calibration of power value acquisition module further is subject to the open loop control of network high level.
15. base station according to claim 11 is characterized in that, described power and acquisition module further are subject to adjustment and the control of network high level.
16. base station according to claim 11 is characterized in that, this base station further comprises: the error adjusting module;
Be preset with the actual value of the user's ratio N that sends the NACK signal in the described error adjusting module, be used in base station sets constantly, user's ratio and the default actual value of the transmission NACK signal that user's ratio acquisition module of more described transmission NACK signal obtains, and when the error of user's ratio of this transmission NACK signal that calculates and actual value exceeds setting range, RNC is to calibration of power value for notice, perhaps power and controlling.
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| WO2015139243A1 (en) * | 2014-03-19 | 2015-09-24 | 华为技术有限公司 | Group communication apparatus and method |
| WO2016176841A1 (en) * | 2015-05-06 | 2016-11-10 | Qualcomm Incorporated | Fast transmission on repair packets with embms |
| CN106657172A (en) * | 2015-10-28 | 2017-05-10 | 北京金山安全软件有限公司 | Method and device for realizing information push |
| CN107135486B (en) * | 2016-02-29 | 2020-04-21 | 展讯通信（上海）有限公司 | Transmission method and device of multicast or multicast service |
| CN108400843B (en) * | 2017-02-07 | 2024-03-05 | 中兴通讯股份有限公司 | Retransmission feedback and triggering method and device |
| CN109391406A (en) * | 2017-08-10 | 2019-02-26 | 株式会社Ntt都科摩 | Data transmission method for uplink, confirmation signal sending method, user equipment and base station |
| WO2020061926A1 (en) * | 2018-09-27 | 2020-04-02 | 富士通株式会社 | Method, device and system for retransmitting in multicast scene |
| CN112152761A (en) * | 2019-06-28 | 2020-12-29 | 华为技术有限公司 | Communication method, device and storage medium |
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| US6993343B2 (en) * | 2000-08-29 | 2006-01-31 | Matsushita Electric Industrial Co., Ltd. | Base station device and wireless communication method |
| CN1910853A (en) * | 2004-01-23 | 2007-02-07 | 皇家飞利浦电子股份有限公司 | A packet data multicast communication system, a station, and a method of operating the system |
| CN1918862A (en) * | 2004-02-12 | 2007-02-21 | 皇家飞利浦电子股份有限公司 | Multicast transmission method, system and communication station |
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| US6993343B2 (en) * | 2000-08-29 | 2006-01-31 | Matsushita Electric Industrial Co., Ltd. | Base station device and wireless communication method |
| CN1910853A (en) * | 2004-01-23 | 2007-02-07 | 皇家飞利浦电子股份有限公司 | A packet data multicast communication system, a station, and a method of operating the system |
| CN1918862A (en) * | 2004-02-12 | 2007-02-21 | 皇家飞利浦电子股份有限公司 | Multicast transmission method, system and communication station |
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