CN102572705B - User feedback-based scheduling method and equipment in multicast system and multicast system - Google Patents
User feedback-based scheduling method and equipment in multicast system and multicast system Download PDFInfo
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Abstract
The invention relates to a user feedback-based scheduling method, user feedback-based scheduling equipment in a multicast system and the multicast system. The method comprises the following steps that: user equipment determines corresponding feedback information for all sub-frames received in a scheduling period in a downlink multicast channel; a corresponding preamble sequence is selected from a preset sequence table, a system frame number is selected in the scheduling period simultaneously, and the determined feedback information is fed back based on the determined preamble sequence and the system frame number in an uplink multicast feedback channel corresponding to the downlink multicast channel; and network equipment detects the preamble sequence of each protocol data unit (PDU) in the uplink multicast feedback channel, counts the number of preamble sequences corresponding to acknowledgement character (ACK) feedback and the number of preamble sequences corresponding to negative acknowledgement (NACK) feedback in the scheduling period, and performs scheduling according to a calculated user ratio of the ACK feedback to the NACK feedback. The method and equipment have the advantages that effective scheduling can be performed on the basis of the feedback information of the user equipment in the multimedia multicast system, so that system performance is improved.
Description
Technical field
The present invention relates to the multi-medium multi-packet broadcasting communications field, particularly relate to and carry out method, equipment and the system of dispatching based on user feedback in multicast system.
Background technology
In evolution type multimedia broadcast multicast service (eMBMS) system, media center (MCE) is responsible for distributing time domain/frequency domain Radio Resource, and determines the further details of radio configuration, such as, and modulation and encoding scheme etc.Before dispatching subscriber equipment, MCE or eNodeB needs to know Multicast Channel information, and Multicast Channel information needs to be fed back by each subscriber equipment (UE) to provide usually.But, in eMBMS system, set up wireless heterogeneous networks (RRC) to connect because UE is unnecessary, that is, for eMBMS subscriber equipment, RRC connects optional, therefore also can not be each user equipment allocation special Physical Uplink Control Channel (PUCCH).Therefore the feedback information how obtaining subscriber equipment is dispatched, and has become the difficult problem that those skilled in the art need to solve.
Summary of the invention
The object of this invention is to provide a kind of method, equipment and system of in multicast system, carrying out dispatching based on user feedback.
According to an aspect of the present invention, provide a kind of method of carrying out dispatching in the network equipment of multi-medium multi-packet broadcasting system based on user feedback, wherein, the method comprises the following steps:
A detects the targeting sequencing of each PDU in a up multicast feedback channel, inquired about by predetermined sequence table and the targeting sequencing added up corresponding within dispatching cycle ACK feedback and NACK feed back corresponding to the number of targeting sequencing, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
The number of the targeting sequencing corresponding to the targeting sequencing corresponding to B feeds back according to added up ACK and NACK feed back, calculates user's ratio of feeding back ACK and NACK;
C dispatches according to user's ratio of calculated feeding back ACK and NACK.
According to another aspect of the present invention, additionally provide a kind ofly provides user feedback to carry out the method for dispatching in the subscriber equipment of multi-medium multi-packet broadcasting system, and wherein, the method comprises the following steps:
The all subframe determination respective feedback information of a for receiving in the dispatching cycle in a downlink Multicast Channel;
B selects corresponding targeting sequencing according to determined feedback information by predetermined sequence table, and within this dispatching cycle selective system frame number, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
C, in the up multicast feedback channel corresponding to this downlink Multicast Channel, feeds back based on determined targeting sequencing and System Frame Number.
According to a further aspect of the invention, additionally provide a kind of network equipment carrying out dispatching in multi-medium multi-packet broadcasting system based on user feedback, wherein, comprising:
Checkout gear, for detecting the targeting sequencing of each PDU in a up multicast feedback channel, inquired about by predetermined sequence table and the targeting sequencing added up corresponding within dispatching cycle ACK feedback and NACK feed back corresponding to the number of targeting sequencing, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
Calculation element, the number of the targeting sequencing corresponding to feeding back for the targeting sequencing corresponding to added up ACK feedback and NACK, calculates user's ratio of feeding back ACK and NACK;
Dispatching device, for dispatching according to user's ratio of calculated feeding back ACK and NACK.
According to a further aspect of the invention, additionally provide a kind ofly provides user feedback to carry out the subscriber equipment dispatched in multi-medium multi-packet broadcasting system, wherein, comprising:
Determining device, for all subframe determination respective feedback information for receiving in the dispatching cycle in a downlink Multicast Channel;
Choice device, for selecting corresponding targeting sequencing according to determined feedback information by predetermined sequence table, and within this dispatching cycle selective system frame number, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
Feedback device, in the up multicast feedback channel corresponding to this downlink Multicast Channel, feeds back based on determined targeting sequencing and System Frame Number.
Compared with prior art, the present invention has the following advantages: in multi-medium multi-packet broadcasting system, effectively can dispatch, improve the performance of system based on the feedback information of subscriber equipment.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the multi-medium multi-packet broadcasting system topological figure of one aspect of the invention;
Fig. 2 be one aspect of the invention in the network equipment of multi-medium multi-packet broadcasting system, carry out based on user feedback the method flow diagram dispatched;
Fig. 3 be another aspect of the present invention in the network equipment of multi-medium multi-packet broadcasting system, carry out based on user feedback the method flow diagram dispatched;
Fig. 4 be another aspect of the present invention in the network equipment of multi-medium multi-packet broadcasting system, carry out based on user feedback the method flow diagram dispatched;
Fig. 5 be one aspect of the invention in the network equipment of multi-medium multi-packet broadcasting system, carry out the system schematic of dispatching based on user feedback;
Fig. 6 be another aspect of the present invention in the network equipment of multi-medium multi-packet broadcasting system, carry out the system schematic of dispatching based on user feedback;
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 shows multi-medium multi-packet broadcasting system topological figure of the present invention.Described multi-medium multi-packet broadcasting system comprises: subscriber equipment 11, subscriber equipment 12 ... subscriber equipment 1N and the network equipment 2; Wherein, the network equipment 2 can be any one can with the electronic equipment of each communications of user equipment, it includes but not limited to: 1) base station, such as, e-NodeB etc.; 2) MCE (MBMS coordination entity) etc.Each subscriber equipment can be the electronic equipment that any one can wirelessly directly or indirectly communicate with the network equipment 2, includes but not limited to: mobile phone, PDA etc.Described multi-medium multi-packet broadcasting system includes but not limited to: eMBMS system etc.
Fig. 2 shows one aspect of the invention carries out the method for dispatching in the network equipment of multi-medium multi-packet broadcasting system flow chart based on user feedback.In order to simplicity of illustration, only be described for the communication interaction between subscriber equipment 11 and the network equipment 2 in figure, but it should be appreciated by those skilled in the art, in fact, subscriber equipment 12 ... subscriber equipment 1N also carrying out communication interaction with the network equipment 2, describes in detail at this no longer one by one.
Particularly, in step s 2, the network equipment 2 sends information by Multicast Channel to each subscriber equipment.Such as, the network equipment 2 sends to subscriber equipment 11, subscriber equipment 12 ... subscriber equipment 1N the information comprising many subframes by downlink Multicast Channel.
Then, in step s3, subscriber equipment 11 receives described information, and all subframe determination respective feedback information for receiving in the dispatching cycle in this downlink Multicast Channel (PMCH channel).As a kind of optimal way, subscriber equipment 11 is a dispatching cycle, such as, 320ms, after receiving the protocol Data Unit (MAC PDU) of last medium education of desired PMCH, all subframes that PMCH channel in the dispatching cycle receives are carried out logic and operation to generate ACK or the NACK feedback information of 1 bit.
Then, in step s 4 which, subscriber equipment 11 selects corresponding targeting sequencing according to determined feedback information by predetermined sequence table, and within this dispatching cycle selective system frame number, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing.As a kind of optimal way, in subscriber equipment 11, subscriber equipment 12 ... subscriber equipment 1N and the network equipment 2, can all preserve identical predetermined sequence table in advance.
Such as, the feedback information that subscriber equipment 11 is determined is ACK feedback, therefore it feeds back with ACK in corresponding targeting sequencing group and selects a targeting sequencing in predetermined sequence table, and in this dispatching cycle, such as, 320ms, interior selection one System Frame Number, such as, 5.
Then, in step s 5, subscriber equipment 11, in the up multicast feedback channel corresponding to this downlink Multicast Channel, feeds back based on determined targeting sequencing and System Frame Number.Such as, subscriber equipment 11 feeds back a corresponding targeting sequencing and frame number 5 based on selected with ACK, is sent by this targeting sequencing with following transmitted power on the time point corresponding to frame number 5:
P＝min{P
CMAX，P
0+PL)，
Wherein, PL is that the descending path loss that subscriber equipment 11 calculates is estimated, P
0the initial receiving target power of targeting sequencing.
Then, in step s 6, the network equipment 2 detects the targeting sequencing of each PDU in a up multicast feedback channel, inquired about by predetermined sequence table and the targeting sequencing added up corresponding within dispatching cycle ACK feedback and NACK feed back corresponding to the number of targeting sequencing, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing.Such as, the network equipment 2 detects the targeting sequencing of each PDU fed back by subscriber equipment 11, subscriber equipment 12 ... subscriber equipment 1N, and inquired about by predetermined sequence table and add up the quantity (namely feeding back to the number of user equipment of ACK) of the targeting sequencing corresponding to ACK feedback and NACK feed back corresponding to the number (namely feeding back to the number of user equipment of NACK) of targeting sequencing.Wherein, subscriber equipment 12 ... subscriber equipment 1N determines that the mode that should feed back to ACK or NACK is identical with the mode of subscriber equipment 11, and namely the respective signal comprising many subframes according to receiving is determined, no longer repeats at this.
Then, in the step s 7, the number of the targeting sequencing corresponding to the targeting sequencing corresponding to the network equipment 2 feeds back according to added up ACK and NACK feed back, calculates user's ratio of feeding back ACK and NACK.Such as, the network equipment 2 is through statistics, and the number of user equipment feeding back to ACK is m, and the number of user equipment feeding back to NACK is n, therefore user's ratio that the network equipment 2 calculates feeding back ACK and NACK is: m/n.
Finally, in step s 8, the network equipment 2 is dispatched according to user's ratio of calculated feeding back ACK and NACK.Such as, the network equipment 2, based on user's ratio: m/n, is dispatched.
Fig. 3 shows the method for dispatching is carried out in another aspect of the present invention in the network equipment of multi-medium multi-packet broadcasting system flow chart based on user feedback.In order to simplicity of illustration, still be described for the communication interaction between subscriber equipment 11 and the network equipment 2 in figure, but it should be appreciated by those skilled in the art, in fact, subscriber equipment 12 ... subscriber equipment 1N also carrying out communication interaction with the network equipment 2, describes in detail at this no longer one by one.
Concrete, in step s 11, the network equipment 2 is broadcasted in described predetermined sequence table for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback to each subscriber equipment.Such as, the network equipment 2 is that each Physical Multicast Channel (PMCH) distributes two uplink channel resources set as follows, a set is used for ACK, another set is used for NACK, and two channel resources define by one group of targeting sequencing with for the fixing time-frequency chance that subscriber equipment feeds back respectively:
for ACK,
for NACK, wherein, i=1,2...M/ (2*PMCH number), M=64 is maximum preamble index, this index reusable PRACH configuration index standard, but need distinguish with PRACH, subsequently, this information is broadcasted by the network equipment 2 in system information block (SIB) message.
Then, in step s 12, each subscriber equipment receives for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback in described predetermined sequence table, to determine the targeting sequencing group fed back corresponding targeting sequencing group with ACK and feed back with NACK in predetermined sequence table.Such as, subscriber equipment 11 receives the targeting sequencing group information being used for ACK feedback
and for NACK feedback targeting sequencing group information
Then, in step s 13, subscriber equipment 11 according to receive for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback, the targeting sequencing in described predetermined sequence table is divided into the targeting sequencing group fed back corresponding targeting sequencing group with ACK and feed back with NACK.
Then, step S2 and S3 is described in detail in the embodiment shown in Figure 2, comprises by reference at this, is no longer repeated.
Then, in step S4 ', subscriber equipment 11 selects corresponding targeting sequencing according to determined feedback information randomly by predetermined sequence table, and within this dispatching cycle selective system frame number randomly.Such as, subscriber equipment 11 is by targeting sequencing group information
middle Stochastic choice one targeting sequencing, and in this dispatching cycle, such as, 320ms, Random select system frame number, such as, be: 5.
It should be appreciated by those skilled in the art that subscriber equipment selects the mode of targeting sequencing and System Frame Number to be not limited in a random basis, such as, can also be that hash formula is selected etc.
Then, step S5 to S6 is described in detail in the embodiment shown in Figure 2, comprises by reference at this, is no longer repeated.
Then, in the step s 7, the number of the targeting sequencing corresponding to the targeting sequencing corresponding to the network equipment 2 feeds back according to added up ACK and NACK feed back, calculates user's ratio of feeding back ACK and NACK.Such as, the network equipment 2 calculates user's ratio of feeding back ACK and NACK according to following formula:
It should be noted that, use same targeting sequencing to carry out the situation fed back although multiple subscriber equipment may be there is simultaneously, if but this ACK/NACK user's ratio is through average relatively for a long time, then this situation can be left in the basket, because under random fashion, the probability that each targeting sequencing is selected by different user devices is identical.
Finally, in step S8 ', the network equipment 2, according to user's ratio of described feeding back ACK and NACK, adjusts the through-put power of the downlink Multicast Channel corresponding to described up multicast feedback channel.Specifically say it, eNodeB, according to user's ratio of described feeding back ACK and NACK, adjusts the through-put power of the downlink Multicast Channel corresponding to described up multicast feedback channel.Such as, eNodeB in advance according to an ACK/NACK ratio target and amount of hysteresis delta of the type determination target of business, when described user's ratio, such as, m/n, during lower than target-delta, then eNodeB increases descending transmitting power by certain step-length and the time interval; And when described user's ratio, such as, m/n, during higher than target+delta, then eNodeB reduces the power of downlink by certain step-length and the time interval, and thus, eNodeB makes actual ACK/NACK ratio be stabilized near target proportion by dynamic adjustment.
Fig. 4 shows the method for dispatching is carried out in another aspect of the present invention in the network equipment of multi-medium multi-packet broadcasting system flow chart based on user feedback.
Concrete, step S11 to S13, step S2 to S7 are described in detail in the embodiment shown in fig. 3, comprise by reference, no longer repeated at this.
Finally, in step S8 " in, the network equipment 2, according to user's ratio of described feeding back ACK and NACK, adjusts encoding scheme and/or the code rate of the Physical Multicast Channel corresponding to described up multicast feedback channel.Specifically say it, MCE, according to user's ratio of described feeding back ACK and NACK, adjusts encoding scheme and/or the code rate of the Physical Multicast Channel corresponding to described up multicast feedback channel.As a kind of optimal way, such as, when eNodeB cannot reach target ACK/NACK ratio by adjustment down transmitting power (as continuous n time is departed from thresholding xdB), thus, this runout information can be fed back to MCE by eNodeB.If runout information is just, MCE can improve code modulation mode (MCS), increases data transmission rate; If runout information is negative, MCE can reduce MCS, to improve the reliability etc. of transmission.
Fig. 5 shows the system schematic that one aspect of the invention carries out based on user feedback dispatching in the network equipment of multi-medium multi-packet broadcasting system.Described subscriber equipment 11 comprises; Determining device 111, choice device 112, feedback device 113; ... subscriber equipment 1N comprises: determining device 1N1, choice device 1N2, feedback device 1N3; The network equipment 2 comprises: checkout gear 21, calculation element 22, dispatching device 23.
Particularly, in step s 2, the network equipment 2 sends information by Multicast Channel to each subscriber equipment.Such as, the network equipment 2 sends to subscriber equipment 11, subscriber equipment 12 ... subscriber equipment 1N the information comprising many subframes by downlink Multicast Channel.
Then, each subscriber equipment receives described information, and all subframe determination respective feedback information for receiving in the dispatching cycle in this downlink Multicast Channel (PMCH channel).As a kind of optimal way, such as, in determining device 111 ... determining device 1N1 each comfortable dispatching cycle, after the protocol Data Unit (MAC PDU) of last medium education receiving desired PMCH, separately all subframes that PMCH channel in the dispatching cycle receives are carried out logic and operation to generate ACK or the NACK feedback information of 1 bit.Such as, determining device 111 determines that feedback information is that ACK feedback ... determining device 1N1 determines that feedback information is NACK feedback.
Then, choice device 112 ... choice device 1N2 selects corresponding targeting sequencing according to determined feedback information by predetermined sequence table separately, and within this dispatching cycle selective system frame number, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing.As a kind of optimal way, described predetermined sequence table has been stored in subscriber equipment 11, subscriber equipment 12 ... subscriber equipment 1N and the network equipment 2 in advance.
Such as, the feedback information that determining device 111 is determined is ACK feedback, therefore choice device 112 feeds back with ACK in corresponding targeting sequencing group and selects a targeting sequencing in predetermined sequence table, and selects a System Frame Number within this dispatching cycle, such as, and 5.Again such as, determining device 1N1 determines that feedback information is NACK feedback, and choice device 1N2 feeds back with NACK in corresponding targeting sequencing group and selects a targeting sequencing in predetermined sequence table, and selects a System Frame Number within this dispatching cycle, such as, and 8.
Then, in the up multicast feedback channel corresponding to this downlink Multicast Channel of each leisure of feedback device 113 ... feedback device 1N3, feed back based on respective determined targeting sequencing and System Frame Number.Such as, feedback device 113 feeds back a corresponding targeting sequencing and frame number 5 based on selected with ACK, is sent by this targeting sequencing on the time point corresponding to frame number 5.Again such as, feedback device 1N3 feeds back a corresponding targeting sequencing and frame number 8 based on selected with NACK, is sent by this targeting sequencing on the time point corresponding to frame number 8.
Then, checkout gear 21 detects the targeting sequencing of each PDU in a up multicast feedback channel, inquired about by predetermined sequence table and the targeting sequencing added up corresponding within dispatching cycle ACK feedback and NACK feed back corresponding to the number of targeting sequencing, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing.Such as, checkout gear 21 detects the targeting sequencing of each PDU fed back by feedback device 113 ... feedback device 1N3, and inquired about by predetermined sequence table and add up the quantity (namely feeding back to the number of user equipment of ACK) of the targeting sequencing corresponding to ACK feedback and NACK feed back corresponding to the number (namely feeding back to the number of user equipment of NACK) of targeting sequencing.
Then, the number of the targeting sequencing corresponding to the targeting sequencing corresponding to calculation element 22 feeds back according to added up ACK and NACK feed back, calculates user's ratio of feeding back ACK and NACK.Such as, calculation element 22 is through statistics, and the number of user equipment feeding back to ACK is m, and the number of user equipment feeding back to NACK is n, therefore user's ratio that calculation element 22 calculates feeding back ACK and NACK is: m/n.
Finally, dispatching device 23 is dispatched according to user's ratio of calculated feeding back ACK and NACK.Such as, dispatching device 23, based on user's ratio: m/n, is dispatched.
Fig. 6 shows the system schematic that another aspect of the present invention carries out based on user feedback dispatching in the network equipment of multi-medium multi-packet broadcasting system.Described subscriber equipment 11 comprises; Receiving system 114, determining device 111, choice device 112, feedback device 113; ... subscriber equipment 1N comprises: receiving system 1N4, determining device 1N1, choice device 1N2, feedback device 1N3; The network equipment 2 comprises: broadcaster 24, checkout gear 21, calculation element 22, dispatching device 23.
Concrete, broadcaster 24 is broadcasted in described predetermined sequence table for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback to each subscriber equipment.Such as, broadcaster 24 is that the ACK/NACK of PMCH is configured with 2 common preamble sequence set:
for ACK,
for NACK, wherein, i=1,2...M/ (2*PMCH number), M=64 is maximum preamble index, this index reusable PRACH configuration index standard, but need distinguish with PRACH, subsequently, this information is broadcasted by broadcaster 24 in system information block (SIB) message.
Then, receiving system 114 ... receiving system 1N4 receives for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback in described predetermined sequence table, to determine the targeting sequencing group fed back corresponding targeting sequencing group with ACK and feed back with NACK in predetermined sequence table.Such as, receiving system 114 receives the targeting sequencing group information being used for ACK feedback
and for NACK feedback targeting sequencing group information
Then, receiving system 114 ... receiving system 1N4 separately according to receive for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback, the targeting sequencing in described predetermined sequence table is divided into the targeting sequencing group fed back corresponding targeting sequencing group with ACK and feed back with NACK.
Then, the course of work of determining device 111 ... determining device 1N1 is described in detail in the embodiment shown in fig. 5, comprises by reference, no longer repeat at this.
Then, choice device 112 ... choice device 1N2 selects corresponding targeting sequencing according to determined feedback information by predetermined sequence table separately randomly, and within this dispatching cycle selective system frame number randomly.Such as, choice device 112 is by targeting sequencing group information
middle Stochastic choice one targeting sequencing, and in this dispatching cycle, such as, 320ms, Random select system frame number, such as, be: 5.
It should be noted that, it should be appreciated by those skilled in the art that choice device 112 ... choice device 1N2 selects the mode of targeting sequencing and System Frame Number to be not limited in a random basis, in fact, can also be that hash formula is selected etc.
Then, feedback device 113; ..., feedback device 1N3 and checkout gear 21 described in detail in the embodiment shown in fig. 5, comprise by reference at this, no longer repeated.
Then, the number of the targeting sequencing corresponding to the targeting sequencing corresponding to calculation element 22 feeds back according to added up ACK and NACK feed back, calculates user's ratio of feeding back ACK and NACK.Such as, calculation element 22 calculates user's ratio of feeding back ACK and NACK according to following formula:
Finally, dispatching device 23, according to user's ratio of described feeding back ACK and NACK, adjusts the through-put power of the downlink Multicast Channel corresponding to described up multicast feedback channel.Such as, dispatching device 23 in advance according to an ACK/NACK ratio target and amount of hysteresis delta of the type determination target of business, when described user's ratio, such as, m/n, during lower than target-delta, then dispatching device 23 increases descending transmitting power by certain step-length and the time interval; And when described user's ratio, such as, m/n, during higher than target+delta, then dispatching device 23 reduces the power of downlink by certain step-length and the time interval, and thus, dispatching device 23 makes actual ACK/NACK ratio be stabilized near target proportion by dynamic adjustment.
Below will based on system shown in Figure 6, what describe another aspect of the present invention in detail carries out the process of dispatching based on user feedback in the network equipment of multi-medium multi-packet broadcasting system.
Concrete, broadcaster 24, receiving system 114, determining device 111, choice device 112, feedback device 113; ... the course of work of receiving system 1N4, determining device 1N1, choice device 1N2, feedback device 1N3, checkout gear 21 and calculation element 22 is described in detail in the embodiment shown in fig. 6, comprises by reference, no longer repeated at this.
Finally, dispatching device 23, according to user's ratio of described feeding back ACK and NACK, adjusts encoding scheme and/or the code rate of the Physical Multicast Channel corresponding to described up multicast feedback channel.Such as, when dispatching device 23 cannot reach target ACK/NACK ratio by adjustment down transmitting power (as continuous n time is departed from thresholding xdB), thus, dispatching device 23 can adjust encoding scheme and/or code rate according to this runout information.If runout information is just, dispatching device 23 can improve code modulation mode (MCS), increases data transmission rate; If runout information is negative, dispatching device 23 can reduce MCS, to improve the reliability etc. of transmission.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.In addition, obviously " comprising " one word do not get rid of other unit or step, odd number does not get rid of plural number.Multiple unit of stating in system claims or device also can be realized by software or hardware by a unit or device.First, second word such as grade is used for representing title, and does not represent any specific order.
Claims (15)
1. in the network equipment of multi-medium multi-packet broadcasting system, carry out a method of dispatching based on user feedback, wherein, the method comprises the following steps:
A detects the targeting sequencing of each PDU in a up multicast feedback channel, inquired about by predetermined sequence table and the targeting sequencing added up corresponding within dispatching cycle ACK feedback and NACK feed back corresponding to the number of targeting sequencing, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
The number of the targeting sequencing corresponding to the targeting sequencing corresponding to B feeds back according to added up ACK and NACK feed back, calculates user's ratio of feeding back ACK and NACK;
C dispatches according to user's ratio of calculated feeding back ACK and NACK.
2. method according to claim 1, wherein, described multi-medium multi-packet broadcasting system comprises eMBMS system, and the described network equipment comprises eNodeB, and wherein, described step C also comprises:
-according to user's ratio of described feeding back ACK and NACK, adjust the through-put power of the downlink Multicast Channel corresponding to described up multicast feedback channel.
3. method according to claim 1 and 2, wherein, described multi-medium multi-packet broadcasting system comprises eMBMS system, and the described network equipment comprises MCE, and wherein, described step C also comprises:
-according to user's ratio of described feeding back ACK and NACK, adjust encoding scheme and/or the code rate of the Physical Multicast Channel corresponding to described up multicast feedback channel.
4. method according to claim 1 and 2, wherein, described method also comprises step:
-broadcast in described predetermined sequence table for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback to each subscriber equipment.
5. in the subscriber equipment of multi-medium multi-packet broadcasting system, provide user feedback carry out a method of dispatching, wherein, the method comprises the following steps:
The all subframe determination respective feedback information of a for receiving in the dispatching cycle in a downlink Multicast Channel;
B selects corresponding targeting sequencing according to determined feedback information by predetermined sequence table, and within this dispatching cycle selective system frame number, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
C, in the up multicast feedback channel corresponding to this downlink Multicast Channel, feeds back based on determined targeting sequencing and System Frame Number.
6. method according to claim 5, wherein, described step b also comprises:
-select corresponding targeting sequencing according to determined feedback information randomly by predetermined sequence table, and within this dispatching cycle selective system frame number randomly.
7. the method according to claim 5 or 6, wherein, described method also comprises step:
-receive for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback in described predetermined sequence table, to determine the targeting sequencing group fed back corresponding targeting sequencing group with ACK and feed back with NACK in predetermined sequence table.
8. in multi-medium multi-packet broadcasting system, carry out based on user feedback dispatch a network equipment, wherein, comprising:
Checkout gear, for detecting the targeting sequencing of each PDU in a up multicast feedback channel, inquired about by predetermined sequence table and the targeting sequencing added up corresponding within dispatching cycle ACK feedback and NACK feed back corresponding to the number of targeting sequencing, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
Calculation element, the number of the targeting sequencing corresponding to feeding back for the targeting sequencing corresponding to added up ACK feedback and NACK, calculates user's ratio of feeding back ACK and NACK;
Dispatching device, for dispatching according to user's ratio of calculated feeding back ACK and NACK.
9. the network equipment according to claim 8, wherein, described multi-medium multi-packet broadcasting system comprises eMBMS system, and the described network equipment comprises eNodeB, wherein,
Described dispatching device also for, according to user's ratio of described feeding back ACK and NACK, adjust the through-put power of the downlink Multicast Channel corresponding to described up multicast feedback channel.
10. the network equipment according to claim 8 or claim 9, wherein, described multi-medium multi-packet broadcasting system comprises eMBMS system, and the described network equipment comprises MCE, wherein,
Described dispatching device also for, according to user's ratio of described feeding back ACK and NACK, adjust encoding scheme and/or the code rate of the Physical Multicast Channel corresponding to described up multicast feedback channel.
11. network equipments according to claim 8 or claim 9, wherein, the described network equipment also comprises:
Broadcaster, for broadcasting to each subscriber equipment in described predetermined sequence table for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback.
12. 1 kinds provide user feedback to carry out the subscriber equipment dispatched, wherein, comprising in multi-medium multi-packet broadcasting system:
Determining device, for all subframe determination respective feedback information for receiving in the dispatching cycle in a downlink Multicast Channel;
Choice device, for selecting corresponding targeting sequencing according to determined feedback information by predetermined sequence table, and within this dispatching cycle selective system frame number, wherein said predetermined sequence table comprises two groups and to feed back with ACK respectively and NACK feeds back corresponding targeting sequencing;
Feedback device, in the up multicast feedback channel corresponding to this downlink Multicast Channel, feeds back based on determined targeting sequencing and System Frame Number.
13. subscriber equipmenies according to claim 12, wherein, described choice device also for, select corresponding targeting sequencing according to determined feedback information randomly by predetermined sequence table, and within this dispatching cycle selective system frame number randomly.
14. subscriber equipmenies according to claim 12 or 13, wherein, described subscriber equipment also comprises:
Receiving system, for receiving for the targeting sequencing group information of ACK feedback and the targeting sequencing group information for NACK feedback in described predetermined sequence table, to determine the targeting sequencing group fed back corresponding targeting sequencing group with ACK and feed back with NACK in predetermined sequence table.
15. 1 kinds of multi-medium multi-packet broadcasting systems, it comprises the network equipment according to any one of claim 8 to 11 and the subscriber equipment according to any one of claim 12 to 14.
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