CN110191441A - The resource allocation methods and communication system of ground base station and multicast satellite - Google Patents
The resource allocation methods and communication system of ground base station and multicast satellite Download PDFInfo
- Publication number
- CN110191441A CN110191441A CN201910435018.7A CN201910435018A CN110191441A CN 110191441 A CN110191441 A CN 110191441A CN 201910435018 A CN201910435018 A CN 201910435018A CN 110191441 A CN110191441 A CN 110191441A
- Authority
- CN
- China
- Prior art keywords
- subgroup
- satellite
- user terminal
- multicast
- mcs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/121—Wireless traffic scheduling for groups of terminals or users
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a kind of ground base station and the resource allocation methods and communication system of multicast satellite, the described method includes: distributing to the user terminal of same multicast satellite for multicast service, subgroup division is carried out to the user terminal according to channel quality indicator CQI value；According to the CQI value of each subgroup user terminal, the modulating-coding mechanism MCS service of corresponding level is distributed for each subgroup；According to the minimum data rate that the MCS at different levels of distribution are serviced, the resource allocation weight of MCS services at different levels is calculated；According to the resource allocation weight of the MCS service distributed for each subgroup, the resource block RB number for the distribution of each subgroup is calculated separately out.It is simple using wireless resource management of the present invention, and can guarantee higher QoS and meet resource allocation fairness.
Description
Technical field
The present invention relates to wireless communication technology field, the resource allocation side of a kind of ground base station and multicast satellite is particularly related to
Method and communication system.
Background technique
With the development of wireless communication technique, more and more users wish whether to stay at home, remote mountain areas, it is marine also
It is that can enjoy same communication service in the air.Especially in the upcoming 5G epoch, data transfer demands are estimated to be up to
Present 1000 times, and wherein having 2/3 flow is multimedia service.Multimedia content delivery service often has a large amount of use
Family, thus occupy frequency bandwidth and resource it is larger, no matter and future 5G key technical index requirement user in where all
It can be successfully accessed network, but only rely on the need that current ground moving usable spectrum is not able to satisfy such large capacity and extensively covers
It asks.
In order to meet the above demand, the characteristics of extensively covering using satellite network, realized using LTE satellite network environment without institute
Not covering demand and pass through day even guaranteeing that the user for being in remote districts also can successfully receive multimedia service
Integration signaling system in ground constructs satellite cluster, promotes ground and spatial frequency spectrum utilization rate.
Have the characteristics that the GEO satellite of broadcast-capable has transmission power big at present, with diameter 1m small size antenna below
Signal can be directly received with equipment, while GEO satellite also has the characteristics that area coverage is wide, signal quality is high, expense is lower.
Existing satellite broadcasting/multicasting technology is used GEO satellite as Transparent Transponder mostly, only carries out star upconversion process.It defends
Star has a single function, and can not form cluster cooperation execution task, to be unable to fully utilize spatial frequency band resource and valuable star
Upper resource.With the development of satellite technology, satellite system of new generation has become with on-board processing (On-Board
Processing), (On-Board Switching or On-Board Routing), multiple spot wave are routed on Onboard switching/star
Next-generation satellite system (the Next-Generation of beam (Multiple Spot Beams), inter satellite link (ISL) communication capacity
Satellite Systems).And existing broadcast/group broadcast satellite not can make full use of technology on these emerging stars.
In terms of realizing to the multicast services of a large amount of multimedia services, refer to that more one is Device-to- at present
Device (D2D) communication technology.This new communication form allows direct communication between neighboring user, can guarantee higher data
Rate, low time delay and higher energy utilization rate.
Emerging D2D technology brings high data rate, and low time delay and more high energy source utilization rate while is also difficult to overcome
The shortcomings that, such as the tremendous growth of D2D number of devices brings signal interference in network coverage and wireless resource management is asked
Topic；And since D2D transmission mostly uses greatly radio honeycomb channeling technology, the degree of interference and the user for having communication requirement
Number is linear to be positively correlated.Use D2D communication that wireless resource management will be made to become sufficiently complex in some cases.
Different from D2D technology, AMC in conventional OFDMA system (Adaptive Modulation and Coding, from
Adapting to modulating-coding mechanism) technical application can equally bring effective performance boost in satellite network system.It is asked in multi-user
In the multicast scene of a data resource of seeking common ground, the setting of configured transmission is based on each subgroup.Therefore same spot beam coverage
Under multicast user experience different channels condition can bring various problems.Under normal conditions, the channel condition having had
Terminal user can support higher level modulating-coding mechanism (Modulation and Coding Scheme, it is simple below
Claim MCS), and the terminal of bad channel quality must then use the stronger MCS of robustness.In multicast service in terms of MCS distribution, have
Two kinds of typical methods:
One kind belonging to conservative method (conservative approach) i.e. CMS (Conventional multicast
Scheme, conservative multicast mechanism), i.e., the superlative degree that the user that entire multicast destination address all uses CQI rank minimum is applicable in
Other MCS, the MCS that can adapt to worst channel condition are serviced.
Another kind belongs to the technology of being randomly assigned (opportunistic approach) i.e. MLA (Multicast Link
Adaptation, multicast link are adaptive) method, the shortcomings that in order to overcome conservative method, it is adaptive to reach multicast link
Purpose only services a part of multicast user in any given time slot, so that its objective function result optimizes, example
Such as throughput of system.
Two kinds of typical MCS distribution methods are also respectively present defect in multicast service:
Conservative method CMS ensure that the maximum fairness of resource allocation, but resource is by the distribution of substantially uniformity, and all
Multicast user obtain identical data rate, greatly reduce spectrum utilization efficiency, and can not reach higher system and gulp down
The amount of spitting.This resource allocation methods not can guarantee higher QoS (service quality) yet simultaneously.
The technology of being randomly assigned will limit the number of users that success services in each time slot.Thus bring influence is to need to make
Ensure that user can notify sender which partial document has been received with additional code mechanism (such as no-rate codes).Although
Random distribution approach realizes long-term fairness (this fairness is more suitable for file transmission), but all due to not all user
It can be serviced in each time slot, institute cannot reach short-term fairness in this way, and short-term fairness is in Stream Media Application
It is even more important in service.
To sum up, existing D2D technology is applied to there is a problem of that wireless resource management is sufficiently complex in Satellite Networking system；
And existing MCS distribution method is applied in Satellite Networking system then exist not can guarantee higher QoS, or cannot reach short-term
The problem of fairness.
Summary of the invention
In view of this, it is an object of the invention to propose resource allocation methods of a kind of ground base station and multicast satellite and logical
Letter system has the advantages that wireless resource management is simple, and can guarantee higher QoS and meet resource allocation fairness.
A kind of resource allocation methods of multicast satellite are provided based on the above-mentioned purpose present invention, comprising:
The user terminal that same multicast satellite is distributed to for multicast service, according to channel quality indicator CQI value to described
User terminal carries out subgroup division；
According to the CQI value of each subgroup user terminal, the modulating-coding mechanism MCS clothes of corresponding level are distributed for each subgroup
Business；
According to the minimum data rate that the MCS at different levels of distribution are serviced, the resource point of MCS services at different levels is calculated
With weight；
According to the resource allocation weight of the MCS service distributed for each subgroup, the resource for the distribution of each subgroup is calculated separately out
Block RB number.
Further, in the user terminal for distributing to same multicast satellite for multicast service, referred to according to channel quality
Before CQI value is marked to user terminal progress subgroup division, further includes:
The CQI value sent from same multicast group user terminal is collected, and calculates the multicast group user terminal sum；
Several geostationary orbit satellites corresponded on longitude in the satellite cluster are chosen, as alternate satellite；
According to the multicast group user terminal sum and the service terminal number of each alternate satellite, from the alternate satellite really
The multicast satellite of at least one fixed multicast group；
In the case of multicast satellite is multiple, the traffic assignments of the multicast group user terminal are given according to impartial distribution principle
Each multicast satellite.
Further, after the resource block RB number calculated as the distribution of each subgroup, further includes:
Calculate the satisfaction of users of each subgroup；
Satisfaction of users is less than the subgroup of given threshold if it exists, then the subgroup of adjacent C QI value is merged behaviour
Make；
Again the RB number of distribution is calculated for each subgroup.
Further, before the satisfaction of users for calculating each subgroup, further includes:
To the RB allocation result of calculated each subgroup, the constraint condition according to setting is checked；
It is again each subgroup meter after the subgroup of adjacent C QI value is merged operation if being unsatisfactory for the constraint condition
The RB number that point counting is matched；And
The satisfaction of users for calculating each subgroup, specifically:
If meeting the constraint condition, the satisfaction of users for calculating each subgroup is calculated.
Further, after the satisfaction of users for calculating each subgroup, further includes:
Satisfaction of users is less than the subgroup of given threshold if it does not exist, then by the current resource of the user terminal point
It is sent to the satellite with situation, carries out the multicast of business to the user terminal according to resource allocation conditions by the satellite；
Wherein, the current resource allocation conditions of the user terminal include: that the current subgroup of the user terminal divides feelings
Condition, the rank and RB number of the MCS service of each subgroup distribution.
The present invention also provides a kind of ground base stations, comprising:
Subgroup division module, for being sowed at traffic assignments to the user terminal of same multicast satellite, according to channel matter to group
Figureofmerit CQI value carries out subgroup division to the user terminal；
MCS services distribution module, for the CQI value according to each subgroup user terminal, distributes corresponding level for each subgroup
Modulating-coding mechanism MCS service；
Resource distribution module, the minimum data rate for being serviced according to the MCS at different levels of distribution, calculates each rank
MCS service resource allocation weight；According to the resource allocation weight of the MCS service distributed for each subgroup, calculates separately out and be
The resource block RB number of each subgroup distribution.
Further, the ground base station further include:
Satisfaction detection module, for calculating the satisfaction of users of each subgroup；By the user experience of each subgroup
Satisfaction exports comparison result compared with given threshold；
Subgroup merging module, the comparison result for exporting in the satisfaction detection module are that there are user experience satisfactions
When degree is less than the subgroup of given threshold, the subgroup of adjacent C QI value is merged into operation, and the subgroup that union operation is obtained is drawn
Point result is sent to the MCS service distribution module, is again each subgroup after union operation by MCS service distribution module
Distribute the modulating-coding mechanism MCS service of corresponding level.
Further, the ground base station further include:
Constraint condition checks module, the pact for the RB allocation result to calculated each group user terminal, according to setting
Beam condition is checked, and outgoing inspection result；And
The subgroup merging module is also used to check the inspection result of module output to be unsatisfactory in the constraint condition
When stating constraint condition, the subgroup of adjacent C QI value is merged into operation, and the subgroup division result that union operation is obtained is sent
Distribution module is serviced to the MCS, is again each subgroup distribution respective stages after union operation by MCS service distribution module
Other modulating-coding mechanism MCS service；And
The satisfaction detection module is specifically used for checking that the inspection result of module output is to meet in the constraint condition
When the constraint condition, the satisfaction of users of each subgroup is calculated；And by the satisfaction of users of each subgroup with set
Determine threshold value comparison, exports comparison result.
Further, the ground base station further include:
Satellite business distribution module for collecting the CQI value sent from same multicast group user terminal, and calculates the group
Broadcast a group user terminal sum；Several geostationary orbit satellites corresponded on longitude in the satellite cluster are chosen, as time
Select satellite；According to the multicast group user terminal sum and the service terminal number of each alternate satellite, from the alternate satellite really
The multicast satellite of at least one fixed multicast group；In the case of multicast satellite is multiple, according to impartial distribution principle by the multicast
The traffic assignments of group user terminal give each multicast satellite.
The present invention also provides a kind of communication systems based on satellite cluster, comprising: satellite cluster, user terminal, Yi Jishang
The ground base station stated.
In technical solution of the present invention, the user terminal of multicast group is divided by multiple subgroups according to the CQI of user terminal,
The scheduler object that each multicast subgroup is regarded as to logical multicast group dynamically distributes MCS clothes according to user terminal channel condition CQI
Business, reduces channel quality difference bring and influences each other；Carrying out resource block (hereinafter referred to as RB, Resource Block) point
Each subgroup can be abstracted as a unicast user by timing, and is introduced distribution weight and carried out RB dynamic allocation, ensure that resource point
With fairness.Meanwhile the resource allocation algorithm is simple, has the advantages that wireless resource management is simple.The method of multicasting realizes
Satellite cluster supports the service of ground large-capacity video forward pass, and can be realized the use of a wide range of multicast including remote districts
The seamless access at family.
Further, constraint condition inspection is carried out to guarantee the reasonability of allocation result, in order to rear to RB allocation result
Continuous operation.
Further, satisfaction of users inspection is carried out to RB allocation result, can better ensures that user experience.
Further, in the technical solution of the embodiment of the present invention, according to impartial distribution principle by the industry of the multicast group user terminal
Each multicast satellite is distributed in business, is realized service distributing, is alleviated single satellite service pressure.
Detailed description of the invention
Fig. 1 is the configuration diagram for the communication system based on satellite cluster that the present invention uses；
Fig. 2 be a kind of ground base station provided in an embodiment of the present invention by the traffic assignments of user terminal in satellite cluster
The method flow diagram of at least one satellite；
Fig. 3 is a kind of resource allocation methods flow chart based on satellite cluster provided in an embodiment of the present invention；
Fig. 4 is a kind of ground base station internal structure block diagram provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that when we claim element to be " connected " or " coupling
Connect " to another element when, it can be directly connected or coupled to other elements, or there may also be intermediary elements.In addition, this
In " connection " or " coupling " that uses may include being wirelessly connected or wireless coupling.Wording "and/or" used herein includes one
A or more associated whole for listing item or any cell and all combination.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
Main thought of the invention is the channel condition being undergoing according to user terminal, multicast reception user terminal
It is divided into different subgroups, it is whole by the user for different CQI channel quality indicators (Channel Quality Indication)
Different MCS modulating-coding mechanism (Modulation and Coding Scheme) is arranged to mitigate bad channel quality in terminal group
Influence of the user to the user that channel quality is good.Using AMC model be each rank CQI user transmit data select it is best
MCS, i.e. M CQI correspond to M available superlative degree MCS.Below for convenience of expressing, by the corresponding highest level MCS table of m grades of CQI
It is shown as m grades of MCS.Its basic thought is that the user terminal of multicast group is divided into multiple subgroups according to the CQI of user terminal, will be every
A multicast subgroup regards the scheduler object of logical multicast group as, is carrying out resource block (hereinafter referred to as RB, Resource Block) point
Each subgroup can be abstracted as a unicast user by timing.Institute is serviced simultaneously with RB in each slot (time slot) in this way, realizing
Some multicast reception user terminals；And MCS is dynamically distributed according to subscriber channel condition, reduce channel quality difference bring phase
It mutually influences, it is ensured that higher QoS；It introduces distribution weight and carries out RB dynamic allocation, ensure that resource allocation fairness, that is, meet
The long-term and short-term fairness of user.Meanwhile the resource allocation algorithm is simple, has the advantages that wireless resource management is simple.
The technical solution for embodiment that the invention will now be described in detail with reference to the accompanying drawings.
As shown in Figure 1, a kind of communication system based on satellite cluster provided in an embodiment of the present invention, comprising: defend in space
Star cluster is set to the ground base station on ground and the user terminal on ground.
It include satellite cluster in the space access net of top layer, satellite cluster is equipped with LTE satellite network by several
The geostationary orbit GEO satellite satellite of (Satellite-LTE, hereinafter referred to as S-LTE) air interface forms, the air interface
Side is responsible for communicating with the user terminal (S-LTE ground based terminal) on ground, and side is responsible for and ground base station (Satellite
ENodeB, hereinafter referred to as S-eNB) communication.The quantity of GEO satellite and orbital position are by the ground observing and controlling in ground base station in cluster
It stands and is determined according to factors such as service traffics, covering surface demand and antenna elevation angles.GEO satellite is responsible for forwarding the connecting station of ground base station
The business datum sent, the signal that connecting station is sent carry out frequency conversion, i.e., upstream frequency (receiving frequency) are transformed into transmitting frequency
Rate (downstream frequency) is emitted after amplification by directional transmitting antenna to the ground.GEO satellite and ground base station in cluster
Continued communication is kept, ground base station is monitored to satellite and data distribution.Between star have stable link, using KA wave band into
Row communicates, for identification principal and subordinate's GEO satellite in same cluster.GEO satellite in cluster is according to business scenario working environment etc.
Factor is shared out the work and helped one another according to master slave mode, master and slave GEO satellite basis of design multicast area, the in-orbit angle of satellite, footprint
The reception elevation angle in domain etc. is adjusted flexibly.Multicast packet content is transmitted along forward pass link, i.e., ground base station → GEO satellite →
S-LTE user terminal.Return link is used to transmit the signaling message of user, i.e. S-LTE user terminal → GEO satellite → ground base
It stands.
Satellite-ground link carries out signal transmission using shift frequency pass-through mode (Ku-S) wave band.S-LTE air interface downlink
Using OFDMA technology, available band is divided into several subcarriers, and insensitive to non-linear distortion.Resource structures time domain according to
Slot (time slot) is divided；Frequency domain is divided according to RB (Resource Block, resource block), and a RB is by 12 adjacent subcarriers
Composition.
This framework follows eMBMS standard towards the service on ground.MBMS-GW (MBMS gateway) is a logic entity,
Major function is that data forward a packet to base station, and broadcast multicast service center (BM-SC) is MBMS business source, while being also responsible for service
Bulletin and multicast member correlation function.Ground base station S-eNB is connected to core net, respectively S-GW (S1-u chain by S1 interface
Connect gateway), P-GW (grouped data network gateway), MME (S1-c links mobility management entity).Multiple ground base stations it
Between can be interconnected by X2 interface, with support aggressive mode business, which is also applied to interference cancellation techniques, and supports to exist
Mobility in adjacent beams overlay area.
Ground base station collects the multicast service demand of user terminal from core net, and if choosing suitably from satellite cluster
Dry satellite is used for multicast service, by the traffic assignments of user terminal to the specific method stream of at least one satellite in satellite cluster
Journey is as shown in Fig. 2, include the following steps:
Step S201: ground base station collects the CQI value sent from same multicast group user terminal, and calculates the multicast group
User terminal sum.
Specifically, ground base station collects the CQI value sent from same multicast group user terminal from core net, and calculating should
Multicast group user terminal sum.For example, ground base station, which is collected into 1000 user terminals from core net, needs to receive same video
The multicast service demand of data, then obtain the CQI value of this 1000 user terminals.
Step S202: ground base station is chosen several geostationary orbits corresponded on longitude in the satellite cluster and is defended
Star, as alternate satellite.
Ground base station collects the current business flow of each satellite in satellite cluster, covering surface demand, antenna elevation angle and current
The data such as satellite parametric reduction (including single GEO satellite serving threshold)；And it is calculated according to the satellite data of collection and chooses corresponding longitude
On several geostationary orbit satellites as alternate satellite and construct GEO satellite cluster network, and obtain network topology.
In addition, ground base station can also to selecting alternate satellite to send test post, the satellite in test cluster whether be can
With further screening out not available satellite.
The also sustainable chaser orbit position of ground base station, takes remote measurement to device parameters various on satellite, at calculating
Telecommand is sent after reason, so that satellite is kept certain tracks positioned precision and antenna-point accuracy, is corrected and safeguards, is controlled
GEO satellite cluster network.
Step S203: ground base station according to multicast group user terminal sum and the service terminal number of each alternate satellite,
The multicast satellite of at least one multicast group is determined from the alternate satellite.
Specifically, ground base station compares the user terminal sum of the multicast group and the clothes of single alternate satellite (GEO satellite)
It is engaged in number of terminals (i.e. serving threshold)；If the user terminal sum of the multicast group is not more than the service terminal number of single alternate satellite,
The main GEO satellite that then ground base station S-eNB is selected in alternate satellite carries out multicast services, remaining GEO satellite is spare；If current
Multicast user's sum has exceeded the serving threshold of single GEO satellite, then enables main GEO satellite and spare GEO satellite conduct simultaneously
Multicast services are carried out from GEO satellite.
Step S204: ground base station uses the multicast group according to impartial distribution principle in the case of multicast satellite is multiple
The traffic assignments of family terminal give each multicast satellite.
Ground base station is in the case of multicast satellite is multiple, the portfolio of master and slave GEO satellite as much as possible equal equal part
Match.For example, set the serving threshold of current single GEO satellite as 400, then for the multicast group of above-mentioned 1000 user terminals,
Ground base station determines the multicast satellite of 3 multicast groups, and 334 user terminal numbers are distributed to the main GEO satellite of multicast satellite,
For 333 one given in multicast satellite from GEO satellite, 333 are given another in multicast satellite from GEO satellite.
The multicast service of same multicast group user terminal is distributed at least one multicast in satellite cluster in ground base station
After satellite, and then resource allocation is carried out for each multicast satellite；That is, the business multicast mode of master and slave GEO satellite by
Ground base station S-eNB is calculated separately and is corresponded to and issues.Specifically, the resource of a kind of multicast satellite provided in an embodiment of the present invention point
Method of completing the square, flow chart is as shown in figure 3, include the following steps:
Step S301: ground base station distributes to multicast service the user terminal of same multicast satellite, according to CQI (letter
Channel quality index value) subgroup division is carried out to the user terminal.
Specifically, ground base station distributes to the multicast according to multicast service for a multicast satellite in satellite cluster
The CQI of the user terminal of satellite carries out subgroup division to these user terminals: the identical user terminal of CQI value being divided into same
In subgroup, subgroup number is identical as CQI number of levels at this time, and same subgroup contains only the user terminal of a CQI rank.
Step S302: ground base station distributes corresponding level according to the CQI value of each subgroup user terminal for each subgroup
MCS (modulating-coding mechanism) service.
Specifically, ground base station, can be according to the CQI institute of lowest level in the subgroup for each subgroup currently divided
The MCS of the highest level of support is serviced, and the MCS service of corresponding level is distributed for the subgroup.
Step S303: the minimum data rate that ground base station is serviced according to the MCS at different levels of distribution calculates each rank
MCS service resource allocation weight.
Specifically, the resource allocation weight P of m rank MCS is introducedm, the weight by different stage MCS minimum data rate
It determines.Ground base station is fewer according to the more high required RB resource of MCS rank, the more original of the more low required RB resource of MCS rank
Then, the minimum data rate of calculating m rank MCS weight shared in total minimum data rate obtains Pm, finally judge the clothes
Whether business rank can be used, can be effective with then weighted value, and unavailable is then 0.It is assigned with the money of the subgroup distribution of m rank MCS service
Source number is total available resources number multiplied by Pm.Wherein, m is the natural number of 1~M, and M is the superlative degree for distributing to the MCS service of subgroup
Not.Above-mentioned total minimum data rate is the sum of the minimum data rate for distributing to each rank MCS service of subgroup.
Step S304: the resource allocation weight that ground base station is serviced according to the MCS that distributes for each subgroup calculates separately out and is
The resource block RB number of each subgroup user terminal distribution.
In this step, the resource allocation weight that ground base station is serviced according to the MCS that distributes for each subgroup calculates separately out and is
Resource block RB number in one slot of each subgroup user terminal distribution.Specifically, ground base station is for each of currently dividing
Subgroup, according to the resource allocation weight of the MCS service distributed for each subgroup, by the resource point of the MCS distributed for each subgroup service
With weight multiplied by total available resources number (total available RB number in a slot) of the satellite, it is calculated as subgroup user
The RB number (being the RB number of subgroup user terminal distribution in a slot) of terminal distribution.
Step S305: ground base station carries out the RB allocation result of calculated each subgroup according to the constraint condition set
It checks；If RB allocation result is unsatisfactory for the constraint condition, step S310 is jumped to, carries out subgroup union operation；If RB points
Meet the constraint condition with result, then continues step S306.
In this step, according to setting constraint condition the RB allocation result of calculated each subgroup is checked, be for
The reasonability of the allocation result is verified, in order to carrying out subsequent operation；If being unsatisfactory for constraint condition, step is jumped to
S310 needs to re-start subgroup division, re-starts resource allocation.
Constraint condition can be set according to the actual situation by those skilled in the art, for example, the constraint condition can be with
Including at least one following condition:
1, when not having user terminal to be assigned to certain grade of MCS service, then the corresponding number of resources of MCS service of the rank is
0；
2, when being assigned to certain grade of MCS service there are user terminal, then the MCS of the rank services corresponding number of resources and exists
1 arrives value between available resources sum；
3, the total number resource dispensed is equal to current available resource sum；
4, it dispenses to the corresponding number of resources of each rank MCS service 1 to value between available resources sum；
5, the same user terminal can only finally be assigned to a MCS service class；
6, the MCS service class that a user terminal is assigned to is not above the highest MCS seeervice level that its CQI is indicated
Not；
7, the rate of the MCS service of certain rank cannot be less than the minimum data speed of user video application request in the rank
Rate, and no more than the maximum data rate of user video application request in the rank.
Step S306: ground base station calculates the satisfaction of users of each subgroup；Satisfaction of users is small if it exists
In the subgroup of given threshold, then step S310 is jumped to, carries out subgroup union operation；Satisfaction of users is less than if it does not exist
The subgroup of given threshold then continues step S307.
Specifically, satisfaction of users is determined by the worst user terminal of service experience in subgroup, and the user experience is full
The corresponding each user terminal of meaning degree and the rate that the subgroup corresponding level MCS is serviced, rank MCS service is up to maximum data speed
Rate and the maximum data rate of each user terminal Video Applications request are related.Satisfaction of users numerical value is specially the rank
The rate of MCS service and the ratio of effective maximum rate；Wherein, it is corresponding to be defined as rank MCS service for effective maximum rate
Lesser value in the reachable maximum data rate of user terminal and the maximum data rate of user terminal Video Applications request；And
Effective maximum numerical value of maximum rate value is only taken to carry out that satisfaction of users is calculated in same subgroup.
After ground base station calculates the satisfaction of users of each subgroup, calculated satisfaction of users is distinguished
It is compared with given threshold；Satisfaction of users is less than the subgroup of given threshold if it exists, then jumps to step S310, into
Row subgroup union operation；Satisfaction of users is less than the subgroup of given threshold if it does not exist, then continues step S307.
Step S307: the current resource allocation conditions of the user terminal are sent to the multicast satellite by ground base station.
Specifically, satisfaction of users illustrates the user experience of each subgroup less than the subgroup of given threshold if it does not exist
Satisfaction is preferable, then the current resource allocation conditions of the user terminal is sent to the multicast satellite, i.e., by service groups
Broadcast mode is handed down to the satellite, carries out the multicast of business to the user terminal according to resource allocation conditions by the satellite.Its
In, the current resource allocation conditions of the user terminal include: the current subgroup dividing condition of the user terminal, each subgroup
The rank and RB number of the MCS service of distribution.
Step S310: after ground base station carries out subgroup union operation, jumping to step S302 again is each subgroup distribution pair
It answers the MCS (modulating-coding mechanism) of rank to service, and continues the step of S302 or less.
In this step, the subgroup of adjacent C QI value is merged operation by ground base station.
Specifically, lowest level CQI subgroup is not involved in subgroup merging before all user terminals merge into a subgroup.It is right
Current subgroup is numbered, and is respectively 1,2 from rudimentary to advanced ..., q；Herein, q indicates current subgroup number, number herein
Number is only represented, it is unrelated with MCS service class.All current all subgroups are renumberd after merging every time.Carry out subgroup merging
Following five conditions can be met when operation simultaneously:
1) lowest level CQI subgroup is not involved in subgroup merging before all users merge into a subgroup.
2) adjacent subgroup is numbered to merge.
3) it is sequentially carried out according to the sequence of number from low to high.
4) current subgroup framework is analyzed, count the CQI value for including in current each subgroup and each subgroup is compared
Compared with, comprising CQI number of levels it is few preferentially merge.
5) one deuterzooid step of every execution only carries out a union operation.
Based on above-mentioned method, a kind of ground base station provided in an embodiment of the present invention, the structural block diagram of internal module
As shown in Figure 4, comprising: subgroup division module 401, MCS service distribution module 402, resource distribution module 403.
Subgroup division module 401 is used to distribute to multicast service the user terminal of same multicast satellite, according to CQI
(channel quality indicator value) carries out subgroup division to the user terminal.
MCS services the CQI value that distribution module 402 is used for the current each subgroup user terminal of basis, for the distribution pair of each subgroup
The modulating-coding mechanism MCS of rank is answered to service.
Resource distribution module 403 is used to service the minimum for the MCS at different levels service that distribution module 402 is distributed according to MCS
Data rate calculates the resource allocation weight of MCS services at different levels；According to the resource of the MCS service distributed for each subgroup
Weight is distributed, the resource block RB number for the distribution of each subgroup is calculated separately out.
Further, a kind of ground base station provided in an embodiment of the present invention may also include that satisfaction detection module 404 and subgroup
Merging module 405.
Satisfaction detection module 404 is used to calculate the satisfaction of users of each subgroup；By the user's body of each subgroup
Satisfaction is tested compared with given threshold, exports comparison result.
The comparison result that subgroup merging module 405 is used to export in satisfaction detection module 404 is that there are user experiences to expire
When meaning degree is less than the subgroup of given threshold, the subgroup of adjacent C QI value is merged into operation, and the subgroup that union operation is obtained
Division result is sent to the MCS service distribution module, is again each son after union operation by MCS service distribution module
The modulating-coding mechanism MCS service of group distribution corresponding level.
Further, a kind of ground base station provided in an embodiment of the present invention may also include that constraint condition checks module 406.
Constraint condition checks that module 406 is used for the RB allocation result to calculated each group user terminal, according to setting
Constraint condition is checked, and outgoing inspection result.
Above-mentioned subgroup merging module 405 can also be used to check the inspection result that module 406 exports in the constraint condition
When to be unsatisfactory for the constraint condition, the subgroup of adjacent C QI value is merged into operation, and the subgroup that union operation is obtained is drawn
Point result is sent to the MCS service distribution module, is again each subgroup after union operation by MCS service distribution module
Distribute the modulating-coding mechanism MCS service of corresponding level；
Correspondingly, above-mentioned satisfaction detection module 404 is specifically used for checking the inspection of module output in the constraint condition
The fruit that comes to an end is when meeting the constraint condition, to calculate the satisfaction of users of each subgroup；And by the user's body of each subgroup
Satisfaction is tested compared with given threshold, exports comparison result.
Further, a kind of ground base station provided in an embodiment of the present invention may also include that satellite business distribution module 407.
Satellite business distribution module 407 is for collecting the CQI value sent from same multicast group user terminal, and calculating should
Multicast group user terminal sum；Several geostationary orbit satellites corresponded on longitude in the satellite cluster are chosen, as
Alternate satellite；According to the multicast group user terminal sum and the service terminal number of each alternate satellite, from the alternate satellite
Determine the multicast satellite of at least one multicast group；In the case of multicast satellite is multiple, according to impartial distribution principle by the group
The traffic assignments of group user terminal are broadcast to each multicast satellite.
Satellite business distribution module 407 is also that there is no user's body in the comparison result that satisfaction detection module 404 exports
When testing subgroup of the satisfaction less than given threshold, the current resource allocation conditions of the user terminal are sent to the multicast and are defended
Star.Wherein, the current resource allocation conditions of the user terminal include: the current subgroup dividing condition of the user terminal, often
The rank and RB number of the MCS service of height group distribution.
Above-mentioned subgroup division module 401 is specifically used for the business of the user terminal according to satellite business distribution module 407
Allocation result distributes to multicast service the user terminal of same multicast satellite in satellite cluster, according to channel quality indicator
CQI value carries out subgroup division to the user terminal.
The function concrete methods of realizing of each module in above-mentioned ground base station can refer to each step in process shown in above-mentioned Fig. 3
Rapid method, details are not described herein again.
In technical solution of the present invention, the user terminal of multicast group is divided by multiple subgroups according to the CQI of user terminal,
The scheduler object that each multicast subgroup is regarded as to logical multicast group dynamically distributes MCS clothes according to user terminal channel condition CQI
Business, reduces channel quality difference bring and influences each other；Carrying out resource block (hereinafter referred to as RB, Resource Block) point
Each subgroup can be abstracted as a unicast user by timing, and is introduced distribution weight and carried out RB dynamic allocation, ensure that resource point
With fairness.Meanwhile the resource allocation algorithm is simple, has the advantages that wireless resource management is simple.The method of multicasting realizes
Satellite cluster supports the service of ground large-capacity video forward pass, and can be realized the use of a wide range of multicast including remote districts
The seamless access at family.
Further, constraint condition inspection is carried out to guarantee the reasonability of allocation result, in order to rear to RB allocation result
Continuous operation.
Further, satisfaction of users inspection is carried out to RB allocation result, can better ensures that user experience.
Further, in the technical solution of the embodiment of the present invention, according to impartial distribution principle by the industry of the multicast group user terminal
Each multicast satellite is distributed in business, is realized service distributing, is alleviated single satellite service pressure.
Those skilled in the art of the present technique have been appreciated that in the present invention the various operations crossed by discussion, method, in process
Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with having been crossed by discussion in the present invention
Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted.
Further, in the prior art to have and the step in various operations, method disclosed in the present invention, process, measure, scheme
It may also be alternated, changed, rearranged, decomposed, combined or deleted.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.Therefore, it is all
Within the spirit and principles in the present invention, any omission, modification, equivalent replacement, improvement for being made etc. be should be included in of the invention
Within protection scope.
Claims (10)
1. a kind of resource allocation methods of multicast satellite characterized by comprising
The user terminal that same multicast satellite is distributed to for multicast service, according to channel quality indicator CQI value to the user
Terminal carries out subgroup division；
According to the CQI value of each subgroup user terminal, the modulating-coding mechanism MCS service of corresponding level is distributed for each subgroup；
According to the minimum data rate that the MCS at different levels of distribution are serviced, the resource allocation power of MCS services at different levels is calculated
Weight；
According to the resource allocation weight of the MCS service distributed for each subgroup, the resource block RB for the distribution of each subgroup is calculated separately out
Number.
2. the method according to claim 1, wherein distributing to same multicast satellite for multicast service described
User terminal, according to channel quality indicator CQI value to the user terminal carry out subgroup division before, further includes:
The CQI value sent from same multicast group user terminal is collected, and calculates the multicast group user terminal sum；
Several geostationary orbit satellites corresponded on longitude in the satellite cluster are chosen, as alternate satellite；
According to multicast group user terminal sum and the service terminal number of each alternate satellite, determined from the alternate satellite to
The multicast satellite of few multicast group；
In the case of multicast satellite is multiple, according to impartial distribution principle by the traffic assignments of the multicast group user terminal to each group
Broadcast satellite.
3. the method according to claim 1, wherein in the resource block RB number calculated as the distribution of each subgroup
Afterwards, further includes:
Calculate the satisfaction of users of each subgroup；
Satisfaction of users is less than the subgroup of given threshold if it exists, then the subgroup of adjacent C QI value is merged operation；
Again the RB number of distribution is calculated for each subgroup.
4. according to the method described in claim 3, it is characterized in that, in the satisfaction of users for calculating each subgroup
Before, further includes:
To the RB allocation result of calculated each subgroup, the constraint condition according to setting is checked；
If being unsatisfactory for the constraint condition, after the subgroup of adjacent C QI value is merged operation, calculates and divide for each subgroup again
The RB number matched；And
The satisfaction of users for calculating each subgroup, specifically:
If meeting the constraint condition, the satisfaction of users for calculating each subgroup is calculated.
5. according to the method described in claim 4, it is characterized in that, in the satisfaction of users for calculating each subgroup
Afterwards, further includes:
Satisfaction of users is less than the subgroup of given threshold if it does not exist, then the resource allocation feelings that the user terminal is current
Condition is sent to the satellite, carries out the multicast of business to the user terminal according to resource allocation conditions by the satellite；
Wherein, the current resource allocation conditions of the user terminal include: the current subgroup dividing condition of the user terminal, often
The rank and RB number of the MCS service of height group distribution.
6. a kind of ground base station characterized by comprising
Subgroup division module refers to for distributing to the user terminal of same multicast satellite for multicast service according to channel quality
It marks CQI value and subgroup division is carried out to the user terminal；
MCS services distribution module, and for the CQI value according to each subgroup user terminal, the tune of corresponding level is distributed for each subgroup
Encoding mechanism MCS service processed；
Resource distribution module, the minimum data rate for being serviced according to the MCS at different levels of distribution, calculates at different levels
The resource allocation weight of MCS service；According to the resource allocation weight of the MCS service distributed for each subgroup, it is each for calculating separately out
The resource block RB number of subgroup distribution.
7. ground base station according to claim 6, which is characterized in that further include:
Satisfaction detection module, for calculating the satisfaction of users of each subgroup；The user experience of each subgroup is satisfied
Degree exports comparison result compared with given threshold；
Subgroup merging module, the comparison result for exporting in the satisfaction detection module are small for there are satisfaction of users
When the subgroup of given threshold, the subgroup of adjacent C QI value is merged into operation, and the subgroup that union operation is obtained divides knot
Fruit is sent to the MCS service distribution module, is again each subgroup distribution after union operation by MCS service distribution module
The modulating-coding mechanism MCS of corresponding level is serviced.
8. ground base station according to claim 7, which is characterized in that further include:
Constraint condition checks module, the constraint item for the RB allocation result to calculated each group user terminal, according to setting
Part is checked, and outgoing inspection result；And
The subgroup merging module be also used to the constraint condition check module output inspection result be unsatisfactory for it is described about
When beam condition, the subgroup of adjacent C QI value is merged into operation, and the subgroup division result that union operation obtains is sent to institute
MCS service distribution module is stated, is again each subgroup distribution corresponding level after union operation by MCS service distribution module
Modulating-coding mechanism MCS service；And
The satisfaction detection module is specifically used for checking that the inspection result of module output is described in satisfaction in the constraint condition
When constraint condition, the satisfaction of users of each subgroup is calculated；And by the satisfaction of users of each subgroup and set threshold
Value compares, and exports comparison result.
9. according to ground base station as claimed in claim 6 to 8, which is characterized in that further include:
Satellite business distribution module for collecting the CQI value sent from same multicast group user terminal, and calculates the multicast group
User terminal sum；Several geostationary orbit satellites corresponded on longitude in the satellite cluster are chosen, are defended as candidate
Star；According to multicast group user terminal sum and the service terminal number of each alternate satellite, determined from the alternate satellite to
The multicast satellite of few multicast group；In the case of multicast satellite is multiple, the multicast group is used according to impartial distribution principle
The traffic assignments of family terminal give each multicast satellite.
10. a kind of communication system based on satellite cluster, comprising: satellite cluster, user terminal, and as claim 6-9 appoints
Ground base station described in one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737295.9A CN108650662A (en) | 2018-07-06 | 2018-07-06 | Ground base station and the resource allocation methods based on satellite cluster and communication system |
| CN2018107372959 | 2018-07-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110191441A true CN110191441A (en) | 2019-08-30 |
| CN110191441B CN110191441B (en) | 2020-07-31 |
Family
ID=63750551
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810737295.9A Withdrawn CN108650662A (en) | 2018-07-06 | 2018-07-06 | Ground base station and the resource allocation methods based on satellite cluster and communication system |
| CN201910435018.7A Active CN110191441B (en) | 2018-07-06 | 2019-05-23 | Resource allocation method and communication system for ground base station and multicast satellite |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810737295.9A Withdrawn CN108650662A (en) | 2018-07-06 | 2018-07-06 | Ground base station and the resource allocation methods based on satellite cluster and communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108650662A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113115236A (en) * | 2021-03-29 | 2021-07-13 | 北京航空航天大学 | Low-complexity multicast group decomposition method based on SVC video stream |
| CN116567762A (en) * | 2023-07-12 | 2023-08-08 | 成都本原星通科技有限公司 | Satellite-ground cooperative selection access control method based on multi-QoS optimization |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3925243B1 (en) * | 2019-02-12 | 2023-08-16 | KOC Universitesi | A method of qos-constrained semi-persistent scheduling of machine type communications in cellular networks |
| CN111355527B (en) * | 2020-03-13 | 2021-09-24 | 北京邮电大学 | Data transmission method and device and electronic equipment |
| CN113115461B (en) * | 2021-04-23 | 2023-04-07 | 北京科技大学 | QMIX-based wireless resource allocation optimization method and device |
| WO2022227061A1 (en) * | 2021-04-30 | 2022-11-03 | 华为技术有限公司 | Resource configuration method and related device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100091739A1 (en) * | 2008-10-14 | 2010-04-15 | Qualcomm Incorporated | Methods and systems for pre-allocating a cqi channel during handoff |
| CN101883325A (en) * | 2009-05-04 | 2010-11-10 | 财团法人工业技术研究院 | Method and apparatus for multicast and broadcast retransmission in wireless communication systems |
| CN102440066A (en) * | 2010-06-15 | 2012-05-02 | 联发科技股份有限公司 | Methods to support mbms service continuity and counting and localized mbms service |
| CN104661184A (en) * | 2013-11-20 | 2015-05-27 | 电信科学技术研究院 | Method and equipment for satellite communication |
| CN108234612A (en) * | 2017-12-23 | 2018-06-29 | 北京卫星信息工程研究所 | The high score Resource dynamic allocation of multi-terminal mode and on-demand service delivery system |
-
2018
- 2018-07-06 CN CN201810737295.9A patent/CN108650662A/en not_active Withdrawn
-
2019
- 2019-05-23 CN CN201910435018.7A patent/CN110191441B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100091739A1 (en) * | 2008-10-14 | 2010-04-15 | Qualcomm Incorporated | Methods and systems for pre-allocating a cqi channel during handoff |
| CN101883325A (en) * | 2009-05-04 | 2010-11-10 | 财团法人工业技术研究院 | Method and apparatus for multicast and broadcast retransmission in wireless communication systems |
| CN102440066A (en) * | 2010-06-15 | 2012-05-02 | 联发科技股份有限公司 | Methods to support mbms service continuity and counting and localized mbms service |
| CN104661184A (en) * | 2013-11-20 | 2015-05-27 | 电信科学技术研究院 | Method and equipment for satellite communication |
| CN108234612A (en) * | 2017-12-23 | 2018-06-29 | 北京卫星信息工程研究所 | The high score Resource dynamic allocation of multi-terminal mode and on-demand service delivery system |
Non-Patent Citations (2)
| Title |
|---|
| G. ARANITI 等: "Effective Resource Allocation in 5G-Satellite Networks", 《2015 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC)》 * |
| LIU YANG 等: "Resource Allocation in Software Defined Hybrid Satellite-Terrestrial Communication Netw", 《2018 INTERNATIONAL CONFERENCE ON NETWORK INFRASTRUCTURE AND DIGITAL CONTENT(ICNIDC)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113115236A (en) * | 2021-03-29 | 2021-07-13 | 北京航空航天大学 | Low-complexity multicast group decomposition method based on SVC video stream |
| CN116567762A (en) * | 2023-07-12 | 2023-08-08 | 成都本原星通科技有限公司 | Satellite-ground cooperative selection access control method based on multi-QoS optimization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108650662A (en) | 2018-10-12 |
| CN110191441B (en) | 2020-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110191441A (en) | The resource allocation methods and communication system of ground base station and multicast satellite | |
| US5612948A (en) | High bandwidth communication network and method | |
| EP3238377B1 (en) | Mesh islands | |
| CN100596235C (en) | Method and system for scheduling of resource based on wireless system | |
| CN102474851B (en) | Terminal installation, communication system and communication means | |
| CN110225565B (en) | Mobile networking method based on multi-beam directional antenna | |
| CN101155395B (en) | Band width distribution method, system and device based on wireless system | |
| CN102355708B (en) | Method and equipment for processing priority level of multimedia broadcast multicast service (MBMS) | |
| CN105959218A (en) | Network route selection method and network route selection system | |
| KR20150062484A (en) | Satellite mesh communication system and ACM control method using it | |
| CN104639642B (en) | Space Internet Information Service system and method | |
| Shaat et al. | Integrated terrestrial-satellite wireless backhauling: Resource management and benefits for 5G | |
| US6963741B2 (en) | Method and a device in a cellular radio system | |
| Wang et al. | Multi-layer LEO satellite constellation design for seamless global coverage | |
| CN101400066A (en) | Method, relay and base station for data transmission on relay link | |
| CN102474733A (en) | Wireless communication system, base station, relay station and method for wireless communication | |
| CN101257338A (en) | Method and device for transmitting signal with distributed aerial | |
| KR101207866B1 (en) | Base station, method used in base station | |
| CN108401299B (en) | Method and system for realizing uplink service, master station and end station | |
| KR20040040387A (en) | Mobile communication system, radio network controller, base station and communication method | |
| CN101801035B (en) | Method and device for transmitting downlink control signaling | |
| KR101382616B1 (en) | apparatus and method for allocating traffic resource in a multi-beam satellite communication system | |
| CN108040346B (en) | Automatic relay method for high-dynamic ground-air network | |
| CN106921975A (en) | A kind of relay transmission method and device based on 230M radio communication private networks | |
| CN101742558A (en) | Data transmission method in wireless relay system, wireless relay system and base station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |