CN105007634A - E-MBMS user scheduling method and device - Google Patents
E-MBMS user scheduling method and device Download PDFInfo
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- CN105007634A CN105007634A CN201510434890.1A CN201510434890A CN105007634A CN 105007634 A CN105007634 A CN 105007634A CN 201510434890 A CN201510434890 A CN 201510434890A CN 105007634 A CN105007634 A CN 105007634A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
- H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
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Abstract
The present application discloses an E-MBMS user scheduling method and device. This method obtains speeds of all the users in a multicast group, and carries out statistics of the number of users whose speeds exceed a preset speed threshold value and statistics of a user proportion. When the user proportion is beyond the preset user proportion threshold that is greater than 50%, it suggests speeds of most users exceed the preset speed threshold, and the speed greater than the preset speed threshold in the multicast group is selected as the speed of the multicast group. If not, the speed that is less than the preset speed threshold in the multicast group is selected as the speed of the multicast group. Then, according to the certain speed and business QoS metrics, the scheduling priority of the multicast group is calculated, and the multicast group is scheduled.
Description
Technical field
The application relates to wireless communication field, more particularly, relates to dispatching method and the device of a kind of E-MBMS user.
Background technology
E-MBMS (Evolved Multimedia Broadcast Multicast Service, the multimedia broadcast-multicast service strengthened) be 3GPP (3rd Generation Partnership Project, third generation partner program) the multimedia broadcasting and multicast function of enhancing that proposes in R9, for providing multimedia broadcasting and multicast services for the user in wireless area.E-MBMS, compared with unicast bearer business, decreases the data volume in network, and takes full advantage of resource.
In E-MBMS system, single-rate transmission mode base station adopts identical speed to all users belonging to same multicast group, and this pattern easily realizes and complexity is lower, is therefore widely used in current E-MBMS system.Current, under single-rate transmission mode, usually select the speed of speed as this multicast group of the user that speed is minimum or maximum in multicast group.When adopting minimum-rate, although data loss rate is low, throughput of system is low; And when adopting maximum rate, throughput of system is high, but data loss rate is high, thus reduces the satisfaction of overall user.
Summary of the invention
In view of this, the application provides dispatching method and the device of a kind of E-MBMS user, to improve the satisfaction of the overall user of E-MBMS.
To achieve these goals, the existing scheme proposed is as follows:
An E-MBMS user's dispatching method, is characterized in that, comprising:
Obtain the speed of each user in same multicast group;
The speed of more each user and scheduled rate thresholding, determine that user that speed is greater than described scheduled rate thresholding accounts for user's ratio of described multicast group;
More described user's ratio and pre-set user ratio thresholding, determine the speed of base station to described multicast group according to comparative result, and described user's ratio thresholding is more than or equal to 50%;
Wherein, if described user's ratio is greater than described pre-set user ratio thresholding, then select to be greater than in described multicast group the speed of certain speed as described multicast group of described scheduled rate thresholding;
If described user's ratio is less than described pre-set user ratio thresholding, then select the speed of certain speed as described multicast group being less than described scheduled rate thresholding in multicast group;
Based on proportional fair scheduling, determine the dispatching priority of described multicast group according to the speed of base station to described multicast group, to dispatch described multicast group.
Preferably, certain speed being greater than described scheduled rate thresholding in described selection described multicast group, as the speed of base station to described multicast group, comprising: select speed maximum in described multicast group as the speed of base station to described multicast group.
Preferably, certain speed being less than described scheduled rate thresholding in described selection multicast group, as the speed of base station to described multicast group, comprising: select speed minimum in described multicast group as the speed of described multicast group.
Preferably, based on proportional fair scheduling, determine the dispatching priority of described multicast group according to the speed of base station to described multicast group, comprising:
In conjunction with the QoS metric value of multicast group, according to preset formula:
calculate the dispatching priority of described multicast group;
Wherein, P
rgt () represents the dispatching priority of multicast group g t Transmission Time Interval on Resource Block r, R
rg(V
rg(t)) represent the instantaneous throughput in multicast group g t time interval on Resource Block r, V
rgt () represents that base station is to the speed in multicast group g t time interval on Resource Block r, T
g(t-1) total throughout of multicast group g t-1 the time interval is represented, w
bear-QoSrepresent the QOS metric of multicast group;
Work as V
rg(t) in multicast group during minimum data transmission rate, R
rg(V
rg(t))=V
rg(t) *
ng, n
gfor total number of users of multicast group;
Work as V
rg(t) in multicast group during maximum data transfer rate, R
rg(V
rg(t))=V
rgt () * N, N are the number of users that in multicast group, message transmission rate is greater than scheduled rate thresholding.
An E-MBMS user's dispatching device, comprises
Data acquisition unit, for obtaining the speed of each user in same multicast group;
First comparing unit, for speed and the scheduled rate thresholding of more each user, determines that user that speed is greater than described scheduled rate thresholding accounts for user's ratio of described multicast group;
Second comparing unit, for more described user's ratio and pre-set user ratio thresholding, determines the speed of described multicast group according to comparative result, described user's ratio thresholding is more than or equal to 50%;
Wherein, if described user's ratio is greater than described pre-set user ratio thresholding, then select to be greater than in described multicast group the speed of certain speed as described multicast group of described scheduled rate thresholding;
If described user's ratio is less than described pre-set user ratio thresholding, then select the speed of certain speed as described multicast group being less than described scheduled rate thresholding in multicast group;
Multicast group scheduling unit, for based on proportional fair scheduling, determines the dispatching priority of described multicast group according to the speed of described multicast group, to dispatch described multicast group.
Preferably, described second comparing unit is specifically for more described user's ratio and pre-set user ratio thresholding, if described user's ratio is greater than described pre-set user ratio thresholding, then selects speed maximum in described multicast group as the speed of described multicast group;
If described user's ratio is less than described pre-set user ratio thresholding, then select speed minimum in multicast group as the speed of described multicast group.
Preferably, described multicast group scheduling unit comprises:
Computation subunit, for the QoS metric value in conjunction with multicast group, according to preset formula:
Wherein, wherein, P
rgt () represents the dispatching priority of multicast group g t Transmission Time Interval on Resource Block r, R
rg(V
rg(t)) represent the instantaneous throughput in multicast group g t time interval on Resource Block r, V
rgt () represents that base station is to the speed in multicast group g t time interval on Resource Block r, T
g(t-1) throughput of multicast group g t-1 the time interval is represented, w
bear-QoSrepresent the QoS metric value of multicast group;
Work as V
rg(t) in multicast group during minimum data transmission rate, R
rg(V
rg(t))=V
rg(t) *
ng,n
gfor total number of users of multicast group;
Work as V
rg(t) in multicast group during maximum data transfer rate, R
rg(V
rg(t))=V
rgt () * N, N are the number of users that in multicast group, message transmission rate is greater than scheduled rate thresholding.
Through as shown from the above technical solution, this application discloses dispatching method and the device of a kind of E-MBMS user.The method obtains the speed of all users in multicast group, and Statistical Rate is more than the number of users of scheduled rate thresholding, and shared user's ratio.When this user's ratio is beyond (this pre-set user ratio thresholding is more than or equal to 50%) during pre-set user ratio thresholding, illustrate that the speed of most of user is beyond scheduled rate thresholding, then select the speed of speed as multicast group being greater than scheduled rate thresholding in multicast group, otherwise option is less than the speed of speed as multicast group of pre-determined threshold.And then, calculate the dispatching priority of this multicast group according to the speed determined and QoS metric value, realize the scheduling to this multicast group.Compared with prior art, the present invention selects the group speed be applicable to according to the speed of most of user, while reducing data loss rate, improves the throughput of system, thus improves the satisfaction of overall user.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 shows the schematic flow sheet of the dispatching method of a kind of E-MBMS user disclosed in one embodiment of the invention;
Fig. 2 shows the structural representation of the dispatching device of a kind of E-MBMS user disclosed in one embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The schematic flow sheet of the dispatching method of a kind of E-MBMS user disclosed in one embodiment of the invention is shown see Fig. 1.
As shown in Figure 1, the method comprises:
101: the speed obtaining each user in same multicast group.
Different for its channel conditions of user being in same multicast group, thus the speed of user's corresponding data of different channels situation is different.The user data rate of channel conditions difference is low, and the data rate that channel conditions is good is high.
It should be noted that, the data rate for same user different Transmission Time Interval on different resource block is different.In the present embodiment, V is adopted
rigt () represents the speed of i user's t Transmission Time Interval on Resource Block r of g group.
102: the speed of more each user and scheduled rate thresholding, determine that user that speed is greater than described scheduled rate thresholding accounts for user's ratio of described multicast group.
Preset a rate threshold, as C=384kbps.The data rate of all users in this multicast group and the rate threshold value preset are compared, Statistical Rate is greater than the number of users of this rate threshold, and shared user compares.
It should be noted that, this rate threshold is semi-static configuration, and engineering staff can set this rate threshold according to the transmission situation of real data.
103: more described user's ratio and pre-set user ratio thresholding, determine the speed of base station to described multicast group according to comparative result, described user's ratio thresholding is more than or equal to 50%;
Wherein, if described user's ratio is greater than described pre-set user ratio thresholding, then select to be greater than in described multicast group the speed of certain speed as described multicast group of described scheduled rate thresholding.
If described user's ratio is less than described pre-set user ratio thresholding, then select the speed of certain speed as described multicast group being less than described scheduled rate thresholding in multicast group.
Optionally, in other embodiments of the invention, when described user's ratio is greater than described pre-set user ratio thresholding, then using the speed of speed maximum in multicast group as multicast group.When described user's ratio is less than described pre-set user ratio thresholding, then select the speed of certain speed as described multicast group being less than described scheduled rate thresholding in multicast group.
104: based on proportional fair scheduling, determine the dispatching priority of described multicast group according to the speed of base station to described multicast group, to dispatch described multicast group.
It should be noted that, in other embodiments of the invention in order to ensure the satisfaction of user, needing QoS (Quality ofService, the service quality) metric considering that described multicast group carries when determining the dispatching priority of multicast group.
Concrete, according to preset formula
calculate the dispatching priority of described multicast group;
Wherein, P
rgt () represents the dispatching priority of multicast group g t Transmission Time Interval on Resource Block r, R
rg(V
rg(t)) represent the instantaneous throughput in multicast group g t time interval on Resource Block r, V
rgt () represents that base station is to the speed in multicast group g t time interval on Resource Block r, T
g(t-1) throughput of multicast group g t-1 the time interval is represented, w
bear-QoSrepresent the QoS metric value of multicast group.
Work as V
rg(t) in multicast group during minimum data transmission rate, R
rg(V
rg(t))=V
rg(t) * n
g, n
gfor total number of users of multicast group.
Work as V
rg(t) in multicast group during maximum data transfer rate, R
rg(V
rg(t))=V
rgt () * N, N are the number of users that in multicast group, message transmission rate is greater than scheduled rate thresholding.
Proportional fair algorithm, after scheduling completes, needs to upgrade the priority factors of multicast group.When system has carried out scheduling continuously to certain multicast group, Ti (t-1) will increase gradually, and dispatching priority is diminished gradually, thus system can be dispatched, and other priority are more much higher broadcasts group.If certain multicast group leader can not get the scheduling of system the phase, so its average throughput Ti (t-1) can reduce, and like this priority will increase, thus obtains the chance be scheduled.Proportional fair algorithm has considered the factor of fairness and systematic function two aspect, is a kind of performance preferably algorithm.
This application discloses dispatching method and the device of a kind of E-MBMS user.The method obtains the speed of all users in multicast group, and Statistical Rate is more than the number of users of scheduled rate thresholding, and shared user's ratio.When this user's ratio is beyond (this pre-set user ratio thresholding is more than or equal to 50%) during pre-set user ratio thresholding, illustrate that the speed of most of user is beyond scheduled rate thresholding, then select the speed of speed as multicast group being greater than scheduled rate thresholding in multicast group, otherwise option is less than the speed of speed as multicast group of pre-determined threshold.And then, calculate the dispatching priority of this multicast group according to the speed determined and QoS metric value, realize the scheduling to this multicast group.Compared with prior art, the present invention selects the speed be applicable to according to the speed of most of user, while reducing data loss rate, improves the throughput of system, thus improves the satisfaction of overall user.In addition, the dispatching priority between multicast group in the present invention considers the QoS of each carrying, on the basis ensureing user satisfaction, improves throughput of system as much as possible, achieves the balance of multi-user diversity and multicast gain.
The structural representation of the dispatching device of a kind of E-MBMS user disclosed in another embodiment of the present invention is shown see Fig. 2.
As shown in Figure 2, this device comprises: data acquisition unit 1, first comparing unit 2, second comparing unit 3 and multicast group scheduling unit 4.
Wherein, the speed of each user collected for obtaining the speed of each user in same multicast group, and is sent to the first comparing unit by data acquisition unit.
The speed of the more each user of the first comparing unit and scheduled rate thresholding, determine that user that speed is greater than described scheduled rate thresholding accounts for user's ratio of described multicast group.
The more described user's ratio of second comparing unit and pre-set user ratio thresholding, determine the speed of base station to described multicast group according to comparative result, and described user's ratio thresholding is more than or equal to 50%.
Wherein, if described user's ratio is greater than described pre-set user ratio thresholding, then select to be greater than in described multicast group the speed of certain speed as described multicast group of described scheduled rate thresholding;
If described user's ratio is less than described pre-set user ratio thresholding, then select the speed of certain speed as described multicast group being less than described scheduled rate thresholding in multicast group.
Multicast group scheduling unit, based on proportional fair scheduling, determines the dispatching priority of described multicast group according to the speed of base station to described multicast group, to dispatch described multicast group.
Optionally, multicast group scheduling unit needs when calculating the dispatching priority of multicast group the QoS metric value considering this multicast group in other embodiments of the invention.Concrete grammar is illustrated in the embodiment of method, and therefore not to repeat here.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an E-MBMS user's dispatching method, is characterized in that, comprising:
Obtain the speed of each user in same multicast group;
The speed of more each user and scheduled rate thresholding, determine that user that speed is greater than described scheduled rate thresholding accounts for user's ratio of described multicast group;
More described user's ratio and pre-set user ratio thresholding, determine the speed of described multicast group according to comparative result, described user's ratio thresholding is more than or equal to 50%;
Wherein, if described user's ratio is greater than described pre-set user ratio thresholding, then select to be greater than in described multicast group the speed of certain speed as described multicast group of described scheduled rate thresholding;
If described user's ratio is less than described pre-set user ratio thresholding, then select the speed of certain speed as described multicast group being less than described scheduled rate thresholding in multicast group;
Based on proportional fair scheduling, according to the dispatching priority speed of described multicast group being determined to described multicast group, to dispatch described multicast group.
2. method according to claim 1, it is characterized in that, certain speed being greater than described scheduled rate thresholding in described selection described multicast group, as the speed of described multicast group, comprising: select speed maximum in described multicast group as the speed of described multicast group.
3. method according to claim 2, is characterized in that, certain speed being less than described scheduled rate thresholding in described selection multicast group, as the speed of described multicast group, comprising: select speed minimum in described multicast group as the speed of described multicast group.
4. method according to claim 3, is characterized in that, based on proportional fair scheduling, determines the dispatching priority of described multicast group, comprising according to the speed of base station to described multicast group:
In conjunction with the QoS metric value of multicast group, according to preset formula:
calculate the dispatching priority of described multicast group;
Wherein, P
rgt () represents the dispatching priority of multicast group g t Transmission Time Interval on Resource Block r, R
rg(V
rg(t)) represent the instantaneous throughput in multicast group g t time interval on Resource Block r, V
rgt () represents that base station is to the speed in multicast group g t time interval on Resource Block r, T
g(t-1) total throughout of multicast group g t-1 the time interval is represented, w
bear-QoSrepresent the QoS metric value of multicast group;
Work as V
rg(t) in multicast group during minimum data transmission rate, R
rg(V
rg(t))=V
rg(t) * n
g, n
gfor total number of users of multicast group;
Work as V
rg(
t) in multicast group during maximum data transfer rate, R
rg(V
rg(t))=V
rgt () * N, N are the number of users that in multicast group, message transmission rate is greater than scheduled rate thresholding.
5. an E-MBMS user's dispatching device, is characterized in that, comprises
Data acquisition unit, for obtaining the speed of each user in same multicast group;
First comparing unit, for speed and the scheduled rate thresholding of more each user, determines that user that speed is greater than described scheduled rate thresholding accounts for user's ratio of described multicast group;
Second comparing unit, for more described user's ratio and pre-set user ratio thresholding, determines the speed of described multicast group according to comparative result, described user's ratio thresholding is more than or equal to 50%;
Wherein, if described user's ratio is greater than described pre-set user ratio thresholding, then select to be greater than in described multicast group the speed of certain speed as described multicast group of described scheduled rate thresholding;
If described user's ratio is less than described pre-set user ratio thresholding, then select the speed of certain speed as described multicast group being less than described scheduled rate thresholding in multicast group;
Multicast group scheduling unit, for based on proportional fair scheduling, determines the dispatching priority of described multicast group, to dispatch described multicast group according to the speed of base station to described multicast group.
6. device according to claim 5, it is characterized in that, described second comparing unit is specifically for more described user's ratio and pre-set user ratio thresholding, if described user's ratio is greater than described pre-set user ratio thresholding, then select speed maximum in described multicast group as the speed of described multicast group;
If described user's ratio is less than described pre-set user ratio thresholding, then select speed minimum in multicast group as the speed of described multicast group.
7. device according to claim 6, is characterized in that, described multicast group scheduling unit comprises:
Computation subunit, for the QoS metric value in conjunction with multicast group, according to preset formula:
Wherein, wherein, P
rgt () represents the dispatching priority of multicast group g t Transmission Time Interval on Resource Block r, R
rg(V
rg(t)) represent the instantaneous throughput in multicast group g t time interval on Resource Block r, V
rgt () represents the speed in multicast group g t time interval on Resource Block r, T
g(t-1) total throughout of multicast group g t-1 the time interval is represented, w
bear-QoSrepresent the QoS metric value of multicast group;
Work as V
rg(t) in multicast group during minimum data transmission rate, R
rg(V
rg(t))=V
rg(t) * n
g, n
gfor total number of users of multicast group;
Work as V
rg(t) in multicast group during maximum data transfer rate, R
rg(V
rg(t))=V
rgt () * N, N are the number of users that in multicast group, message transmission rate is greater than scheduled rate thresholding.
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