CN106304102B - A kind of channel multiplexing method based on wireless network receiving end caching - Google Patents
A kind of channel multiplexing method based on wireless network receiving end caching Download PDFInfo
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Abstract
The present invention relates to a kind of channel multiplexing methods based on wireless network receiving end caching, comprising the following steps: 1) primary receiver end stores business tine in the buffer；2) primary sending point obtains the business tine situation that primary receiver end is cached；3) when secondary sending point judges whether the primary channel on surrounding associated primary sending point is occupied by the method for frequency spectrum perception, it is i.e. not available, if, then carry out step 4), if not, then using unappropriated primary channel as the available channel of secondary sending point, and carry out step 5)；4) secondary sending point and surrounding associated primary sending point carry out intercommunication, and judge whether the occupied primary channel can be used as the available channel of secondary sending point, if so, step 5) is carried out, if it is not, then return step 3)；5) secondary sending point sends information to secondary receiving end by available channel.Compared with prior art, the present invention has many advantages, such as to increase spectral multiplexing rate, inexpensively enrich.
Description
Technical field
The present invention relates to information engineering fields, more particularly, to a kind of channel multiplexing based on wireless network receiving end caching
Method.
Background technique
The promotion major impetus of traditional network capacity first is that constantly newly-increased frequency spectrum resource.It is got over however as frequency spectrum resource
Come more rare, and network capacity requirements are higher and higher, cannot the mode again dependent on newly-increased frequency spectrum promote network capacity.It needs not
The disconnected utilization rate for promoting existing frequency spectrum promotes spectrum efficiency to promote network performance, overcomes frequency spectrum bottleneck.Based on spectrum cognitive
Spectrum reuse may be implemented in frequency spectrum access access technology, efficiently uses idle channel, effectively promotion spectrum efficiency.Spectrum cognitive can
It is divided into band (underlay) and with outer two class of (overlay) spectrum cognitive.In with interior spectrum cognitive, guaranteeing naive user
Signal quality under the premise of, secondary user's and naive user can access same channel simultaneously.It is primary in out of band spectrum cognition
User distributes to a part of channel and gives secondary user's use, and the channel that secondary user's and naive user are accessed is mutually orthogonal.
In addition, the promotion of previous network performance is mainly two aspect power, it is on the one hand newly-increased frequency spectrum mentioned immediately above
Access, is on the other hand the progress (such as MIMO technology, new modulation-demodulation technique etc.) of new technology of eating dishes without rice or wine.However, with nothing
The development of line communication technology, above two aspects encountered bottleneck, the promotion of network performance needs new power resources.Network and letter
The combination of breath technology is future network development trend.Existing and future network is the social networks of multimedia content driving, different
In traditional voice network, multi-medium data transmission is existing and future wireless network main purpose.Multimedia content itself has
Certain attribute, user behavior feature is also regular to be excavated.Such as, big although wireless network traffic is huge in a period of time
Certain customers are concerned with the popular content of sub-fraction.That is, most network flow is for transmitting sub-fraction
Popular content.The transmission of business tine has redundancy and repeatability, and in a period of time, the redundancy capacity of flood tide is repeated
Property transmission.Moreover, the calculating of the network equipment and user terminal and storage capacity will be continuously improved, Yong Huhe according to Moore's Law
Network possesses a large amount of storage computing resource.Therefore researcher proposes caching technology, and the introducing of caching technology can be to network
Framework and network protocol bring huge change, be the network architecture deployment and network protocol formulation it is more flexible, scalability
Become strong.
About wireless frequency spectrum cognitive communications, researcher has done many work, proposes many significant application scenarios, point
Corresponding theoretical performance is analysed.Being communicated based on the secondary user's for recognizing idle honeycomb channel under such as honeycomb；Recognized based on frequency spectrum
The self-organizing network etc. known.However, traditional wireless cognition technology not can make full use of business and user behavior attribute, also
The design of relevant frequency spectrum cognition access technology is not carried out from caching technology.
The introducing of caching technology can be the framework deployment and the formulation of communication protocol of wireless frequency spectrum cognition network etc. band
To change.The combination of communication and information technology sufficiently excavates operation layer attribute and user behavior feature, utilizes the network equipment and use
The calculating storage resource abundant of family terminal carries out the design of the spectrum cognitive access network based on caching technology, on the one hand may be used
To exchange expensive rare frequency spectrum resource for with the cheap storage resource abundant that calculates, frequency spectrum effect on the other hand can further improve
Rate promotes network performance.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of increase spectrum reuses
Rate, the cheap channel multiplexing method abundant based on wireless network receiving end caching.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of channel multiplexing method based on wireless network receiving end caching, comprising the following steps:
1) business tine is stored in the caching of primary receiver end by the primary receiver end in wireless network by caching mechanism；
2) primary sending point obtains the business tine situation that the primary receiver end in its coverage area is cached；
3) after secondary sending point receives the request of secondary receiving end, by related around the method judgement of frequency spectrum perception
Whether the primary channel on primary sending point is occupied, i.e., not available, if so, step 4) is carried out, if it is not, then will be not occupied
The primary channel used and carries out step 5) as the available channel of secondary sending point；
4) secondary sending point and the surrounding associated primary sending point information to be sent in occupied primary channel carry out
Intercommunication, and judge whether the occupied primary channel can be used as the available channel of secondary sending point accordingly, if so, carrying out
Step 5), if it is not, then return step 3)；
5) secondary sending point sends information to secondary receiving end by available channel.
Judge whether the occupied primary channel can be used as the method for available channel of secondary sending point are as follows:
If secondary sending point around associated primary sending point in the occupied primary channel information to be sent with
The buffered business tine in corresponding primary receiver end is identical, or secondary sending point is wanted in the occupied primary channel
The information of transmission is identical as primary sending point information to be sent in the occupied primary channel, then determines the primary channel
Available channel as secondary sending point.
When secondary sending point around associated primary sending point in the occupied primary channel information to be sent with
When the buffered business tine in corresponding primary receiver end is identical, the step 5) is further comprising the steps of:
51) primary receiver end obtains itself channel information CSI between secondary base station, and primary receiver end has been cached
Business tine carries out interference elimination as side information, to the interference signal sent from secondary sending point.
When the information to be sent and primary sending point are occupied at this in the occupied primary channel for secondary sending point
Primary channel on the information to be sent it is identical when, the step 5) is further comprising the steps of:
52) primary receiver end obtains itself channel information CSI between secondary base station, and to from primary sending point and time
The signal of grade sending point is overlapped processing, realizes signal enhancing.
When secondary receiving end is also the receiving end with caching function, and business tine of its caching and primary sending point are sent out
When the information sent is identical, the step 5) is further comprising the steps of:
53) secondary receiving end obtains itself channel information CSI between primary base station, and secondary receiving end itself has been delayed
The business tine information deposited carries out interference elimination as side information, to the interference signal sent from primary sending point.
In the step 3), judge primary channel information resources on surrounding associated primary sending point whether Chong Zu side
Method are as follows:
Secondary sending point perceives the energy size that all channels receive, if energy is higher than setting threshold, determines this letter
Road is occupied.
In the step 4), secondary sending point will be sent out in occupied primary channel with surrounding associated primary sending point
The information sent carries out the mode of intercommunication are as follows:
Primary sending point and secondary sending point are by way of being named label to business tine or the side of additional signaling
Formula carries out intercommunication.
Primary receiver end is judged by the following manner information transmitted by secondary sending point and own local cache information
It is identical or identical as the information that primary sending point is sent:
Primary sending point send one bit to primary receiver end is multiple, and 0 indicates that information transmitted by secondary sending point is just
Grade receiving end own local cache information, 1 indicates the information phase of the information that secondary sending point is sent and primary sending point transmission
Together.
Compared with prior art, the invention has the following advantages that
1, the present invention sufficiently excavates service attribute and user behavior feature, and the frequency for carrying out intelligent and high-efficiency is cached based on receiving end
Spectrum cognition access, improves the availability of frequency spectrum.
2, network performance is promoted using the cheap storage computing resource abundant that user terminal and the network equipment are possessed.
Expensive rare radio spectrum resources are exchanged for cheap storage computing resource abundant.
3, Interference Cancellation can be carried out by receiving end caching, increases the reusability of frequency spectrum.
4, label is named to transmission information by the way that secondary sending point and primary sending point are unified, signal increasing can be carried out
By force, increase the reusability of frequency spectrum.
Detailed description of the invention
Fig. 1 is simplified spectrum cognitive network topology model.
Fig. 2 is secondary information transmitting station time slot.
Fig. 3 is flow chart of the method for the present invention.
Fig. 4 is the schematic network structure in embodiment 1.
Fig. 5 is the schematic network structure in embodiment 2.
Fig. 6 is the schematic network structure in embodiment 3.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
In the wireless network, radio spectrum resources are an important factor for influencing network performance.Wireless frequency spectrum cognitive techniques are
Improve the effective way of spectrum efficiency.However traditional spectrum cognitive technology fails to make full use of calculating abundant in existing network
And storage resource, fail that business tine attribute and user behavior feature is combined to realize the intelligent and high-efficiency knot of information and communication technology (ICT)
It closes.It when into spectrum cognitive Technology design, needs to take into account operation layer and user social contact feature, realizes cross layer design, fill
Divide and excavates the promotion that network potential realizes network performance.For this problem, the present invention proposes a kind of based on wireless network receiving end
The channel multiplexing method of caching, while realizing interference elimination and signal enhancing.
As shown in Figure 1, in figure there are two base station (the present invention is not limited to base stations, can be all types of information sending station points,
It is not limited to station number), base station 1,2.Wherein base station 1 is primary data transmitting station, i.e., frequency spectrum resource owner in network.Base
2 are stood as secondary information transmitting station, base station 2 needs to borrow the frequency spectrum resource of primary data transmitting station by spectrum cognitive.
(the present invention is not limited to user terminals, can be all types of information receiving ends, as received letter in uplink for two user terminals
The base station etc. of breath), one is primary receiver end, i.e., is covered by base station 1, another is secondary receiving end, i.e., is covered by base station 2
Lid.Two user terminals are owned by certain caching capabilities, and (or wherein primary user terminal possesses caching capabilities, secondary user's
Terminal is without caching capabilities；Or primary user terminal possesses caching capabilities, secondary user's terminal has caching capabilities but is reluctant to
Or it is not cached；There are also other situations etc.；This figure only does example).It is (such as maximum according to certain network performance objective
Change network capacity, maximum spectral efficiency, energy efficiency etc.), each user terminal stores one according to corresponding cache policy
Fixed business tine.In such as figure, primary user terminal has cached business tine 2,3,4；In secondary user's terminal buffers business
Hold 1.
When base station 2 sends information to its receiving end if you need to access the channel of primary base station 1, need to meet certain prerequisite
(channel idle such as corresponding primary base station 1 is unoccupied, and the signal that secondary base station 2 is sent for another example is to primary receiver end for condition
Interference be less than certain threshold), that is, be necessary to ensure that the access of secondary base station 2 will not generate the service quality of primary base station 1
Baneful influence.It is explained in order to make it easy to understand, we choose a kind of situation.Consider the signal sent when secondary base station 2 to first
When the interference of grade receiving end is smaller, secondary base station 2 could access this channel and send information to its user.For in traditional sense,
When base station 2 is intended to send business tine to secondary receiving end, if it (is also wanted at primary receiver end when larger to the interference at primary receiver end
Receive the information from primary base station 1), base station 2 cannot access primary channel.But when primary base station 1 by primary channel to
When primary receiver end sends content information 1, if secondary base station is intended to the content information (such as content information 2) sent to secondary receiving end
When being buffered in primary receiver end, and if the channel state information CSI from secondary base station 2 to primary receiver end is estimated by channel
The methods of meter perfect can obtain, and the primary receiver end for possessing caching capabilities can use local 2 conduct of business tine cached
Side information eliminates the interference signal from base station 1.The naive user for possessing caching capabilities can will come from secondary base
The 2 very big interference signal of intensity of standing dies down, even if secondary base station 2 and primary base station 1 access primary channel jointly at this time, secondary
The service quality of the primary base station 1 in 2 pairs of base station can't generate baneful influence, and secondary base station 2 can still access primary channel.It can
Know, using the caching capabilities of receiving end, can be further improved spectrum efficiency, realizes with cheap storage computing resource abundant
To exchange the purpose of expensive rare frequency spectrum resource for.
Likewise, when known to channel information CSI, when identical services content is sent out simultaneously with primary base station in secondary base station,
If primary base station 1 sends business tine 1 to naive user, when secondary base station 2 also sends business tine 1 to secondary user's, tradition
It is interference to naive user that secondary base station 2, which sends signal, in meaning, can be used as useful signal in fact and be superimposed upon primary use
The signal from primary base station 1 that family receives carries out signal enhancing.Therefore in this case, secondary base station can also with it is first
Primary channel is accessed in grade base station simultaneously.
As shown in figure 3, the technical solution adopted by the present invention includes the following steps:
Step 1: business tine being stored in by primary receiver end with certain caching mechanism, what when caching mechanism determines in
Between, in which way, by what content, in the form of what kind of, which receiving end be buffered in.When can be network idle on the time
Quarter or business service moment.Mode will letter while can receiving information by efficient broadcast/multi broadcast or user
Breath caching.It is high that content can be popular attention rate, is also possible to most recently requested.Form can be in entire business
Hold, can be the coded combination of business tine segment or multiple contents.Being buffered in which receiving end should can be according to specific mesh
Depending on mark, such as using maximum spectral efficiency, maximization network capacity as target.
Step 2: (the present invention is not limited to base stations, can be other kinds type by effective mechanism acquisition for primary base station
Information sending station point) the business tine situation that is cached of the primary receiver end in its coverage area.Primary base station passes through primary letter
Road sends information to naive user.
Step 3: when secondary base station receives secondary user's request, perceiving surrounding by traditional frequency spectrum sensing method can benefit
Primary channel.If can be sufficient using primary channel resource around perceiving, step 5 be jumped to；Otherwise, step 4 is jumped to,
The energy size that a certain channel receives is perceived, if energy is higher than a threshold, just determines that this channel is occupied
Step 4: (respective channel refers to, in step 3 with each comfortable respective channel of surrounding associated primary base station intercommunication for secondary base station
The corresponding not available primary channel of middle perception) information to be sent.If secondary base station is in the respective channel letter to be sent
Breath has cached at respective primary user, or secondary base station will send letter in the respective channel information to be sent and primary channel
Manner of breathing is same, these primary channels are also available channel for secondary base station, and jump to step 5, and intercommunication mode can be, secondary
Base station and primary base station unification are named label to business tine, and transmission services label will respectively transmit information with intercommunication.It is secondary
Grade base station and primary base station can carry out intercommunication by effective means such as additional signalings.
Step 5: secondary base station is in available channel (for including without the secondary base station available channel of step 4: step 3
The exploitable channel of middle perception.Include for the secondary base station available channel Jing Guo step 4: perceived in step 3 using letter
Available channel in road and step 4) to secondary user's send information.
Step 6: the channel information CSI in naive user acquisition and step 4 between secondary base station.If the secondary base in step 4
Transmitted information of standing is naive user oneself local cache information, then naive user has been cached in step 6 using local
Business tine carries out interference elimination as side information and channel information CSI, to the interference signal from secondary base station.If step 4
In secondary base station transmitted by information be with primary base station send identical information, then naive user step 6 using believe
Road information CSI the processing such as is overlapped to the signal from secondary base station and primary base station, carries out signal enhancing.
It is oneself local cache information that naive user, which differentiates information transmitted by secondary base station, or and primary base station hair
The identical information sent, mode can be with are as follows: primary base station multiple one bit to naive user, 0 indicates that secondary base station is sent out
The information sent is the local cache information of naive user oneself, and 1 indicates that information transmitted by secondary base station is sent out with primary base station
The identical information sent.In addition, the channel information CSI in naive user acquisition and step 4 between secondary base station can also be in other steps
It is obtained in an appropriate manner in rapid.
As shown in Fig. 2, the time slot of primary data transmitting station is divided into 3 sub-slots as secondary information transmitting station
It is operating slotted,
Wherein T1< < T3, T2< < T3.Secondary information transmitting station is respectively in sub-slots T1, T2, T3Complete step 3,4,5
Relevant operation.Secondary information transmitting station is being T to the time span of secondary user's transmission information3, and primary data is sent
The time span of website to naive user transmission information is T1+T2+T3=T.
Embodiment 1:
It is shown there are two base station (being not limited to base station, can be all types of information sending station points) such as Fig. 4, base station 1 and 2,
Base station 1 is primary base station, and base station 2 is secondary base station.Two receiving ends (user terminal), one of user terminal have caching energy
Power is naive user, is covered by primary base station 1.Another user is secondary user's, is covered by secondary base station 2 without caching capabilities
Lid.By step 1 of the present invention, primary user terminal has cached business tine 1,2,3.And by step 2, base station has been obtained just
The content situation that grade user has cached.In step 3, if secondary base station perceive around available primary channel do not fill
Foot, secondary base station need to pass through the effective means intercommunication information respectively to be sent (intercommunication mode example according to step 4 and primary base station
Such as label can be named to realize by unified business tine, secondary base station and primary base station are by exchanging content number come really
Determine other side's information to be sent He sent).When primary base station 1 sends content 4, while secondary base station 2 to naive user
Content 2 is sent to secondary user's.According to step 4, secondary base station knows that the content information 2 to be sent to secondary user's has delayed
There are naive user end, then secondary base station and primary base station can simultaneously using primary base station channel respectively to secondary user's and
Naive user sends content information 2 and content information 4.Then the reception information of naive user may be expressed as:
Wherein, P is to send power, di,jAnd hi,j(i, j ∈ { 1,2 }) are between corresponding base station and user respectively away from information
Road decline, β >=2 are path-loss factor, xi(i=2,4) is the transmission signal of corresponding unit power, n0It is σ for power2's
Gauss additive white noise.
It is contemplated that naive user can obtain accurate CSI channel state information in step 6 of the present inventionTherefore, naive user is based on side information, that is, local cache business tine (x2) and CSI information
Distracter can be eliminatedTherefore, SINR when naive user reception content 4 are as follows:
The signal that secondary user's receive may be expressed as:
Therefore, it is non-can cache user receive signal SINR be
Therefore in corresponding primary channel, the informational capacity of simultaneous transmission is
Cc=Blog2(1+SINRp)+Blog2(1+SINRs)
Wherein B is primary channel bandwidth.And in the non-caching network of tradition, in corresponding primary channel, secondary user's
With naive user can not simultaneous transmission, can only naive user transmit information.Then transmit informational capacity are as follows:
Co=Blog2(1+SINRp)
Compare CoAnd CcIt is found that caching the frequency spectrum perception access for carrying out intelligence based on receiving end, can effectively improve network has
Capacity is imitated, spectrum efficiency is improved.
Embodiment 2:
As shown in figure 5, more preferably situation is that, if secondary user's terminal also there are caching capabilities, and cache primary base
It stands the information to be sent to naive user, the secondary user's in figure have cached content information 4.Secondary base station and primary base station are same
When the channel of Shi Liyong primary base station sends content information 2 and content information 4 to secondary user's and naive user respectively, primary is used
Family and secondary user's receiving end SINR are respectively as follows:
From the above equation, we can see that the information transmission between secondary base station and primary base station is independent of each other at this time, can obtain more preferably
System performance further promotes the effective transmission capacity of network, further increases the availability of frequency spectrum.
Embodiment 3:
As shown in fig. 6, content information 4 such as is sent simultaneously when secondary base station is identical as the primary base station information to be sent,
Secondary base station and primary base station can send information to secondary user's and naive user respectively simultaneously.Naive user and secondary user's
Receiving end SINR is respectively as follows:
From the above equation, we can see that the information transmission between secondary base station and primary base station cooperates enhancing at this time, can obtain more
Excellent system performance further promotes the effective transmission capacity of network, further increases the availability of frequency spectrum.
The present invention is not limited to receiving end cachings, if working as secondary information information sending station point (as cached based on transmitting terminal)
The sending point information to be sent caches at primary transmitting station, and primary transmitting station is using the secondary dispatching station cached
CSI between information, secondary transmitting station and primary receiver end that point to be sent, to be sent to the data information at primary receiver end into
Row signal processing, by treated, signal is sent to primary receiver end.It is sent when primary receiving end receives simultaneously from primary
The interference information that website treated information and secondary transmitting station are sent, if the service quality at primary receiver end does not deteriorate,
Secondary information transmitting station also can use primary channel and send information to secondary receiving end, and above situation can also utilize the present invention
Middle mentioned method and thought also belong to protection point of the invention.
Claims (4)
1. a kind of channel multiplexing method based on wireless network receiving end caching, which comprises the following steps:
1) business tine is stored in the caching of primary receiver end by the primary receiver end in wireless network by caching mechanism；
2) primary sending point obtains the business tine situation that the primary receiver end in its coverage area is cached；
3) after secondary sending point receives the request of secondary receiving end, surrounding associated primary is judged by the method for frequency spectrum perception
Whether the primary channel on sending point is occupied, i.e., not available, if so, step 4) is carried out, if it is not, then will be unappropriated
Available channel of the primary channel as secondary sending point, and carry out step 5)；
4) secondary sending point and the surrounding associated primary sending point information to be sent in occupied primary channel carry out intercommunication,
And judge whether the occupied primary channel can be used as the available channel of secondary sending point accordingly, if so, carrying out step
5), if it is not, then return step 3), judge whether the occupied primary channel can be used as the available channel of secondary sending point
Method are as follows:
If secondary sending point around associated primary sending point in the occupied primary channel information to be sent with it is corresponding
Primary receiver end it is buffered business tine it is identical, or secondary sending point will send in the occupied primary channel
Information it is identical as primary sending point information to be sent in the occupied primary channel, then determine the primary channel conduct
The available channel of secondary sending point；
5) secondary sending point sends information to secondary receiving end by available channel, when associated primary is sent out around for secondary sending point
Send a little information the to be sent business tine buffered with corresponding primary receiver end in the occupied primary channel
When identical, the step 5) is further comprising the steps of:
51) primary receiver end obtains itself channel information CSI between secondary base station, and the business that primary receiver end has been cached
Content carries out interference elimination as side information, to the interference signal sent from secondary sending point；
When the information to be sent and primary sending point are occupied just at this in the occupied primary channel for secondary sending point
When the information to be sent is identical on grade channel, the step 5) is further comprising the steps of:
52) primary receiver end obtains itself channel information CSI between secondary base station, and sends out from primary sending point and secondary
It send signal to be a little overlapped processing, realizes signal enhancing；
When secondary receiving end is also the receiving end with caching function, and business tine of its caching and primary sending point are sent
When information is identical, the step 5) is further comprising the steps of:
53) secondary receiving end obtains itself channel information CSI between primary base station, and secondary receiving end has been cached itself
Business tine information carries out interference elimination as side information, to the interference signal sent from primary sending point.
2. a kind of channel multiplexing method based on wireless network receiving end caching according to claim 1, which is characterized in that
In the step 3), judge primary channel information resources on surrounding associated primary sending point whether Chong Zu method are as follows:
Secondary sending point perceives the energy size that all channels receive, if energy is higher than setting threshold, has determined this channel
It is occupied.
3. a kind of channel multiplexing method based on wireless network receiving end caching according to claim 1, which is characterized in that
In the step 4), secondary sending point and the surrounding associated primary sending point information to be sent in occupied primary channel
Carry out the mode of intercommunication are as follows:
Primary sending point and secondary sending point by way of being named label to business tine or the mode of additional signaling into
Row intercommunication.
4. a kind of channel multiplexing method based on wireless network receiving end caching according to claim 1, which is characterized in that
Primary receiver end is judged by the following manner information transmitted by secondary sending point, and cache information is identical with own local, still
It is identical as the information that primary sending point is sent:
Primary sending point send one bit to primary receiver end is multiple, and 0 indicates that information transmitted by secondary sending point is that primary connects
Cache information, the information that the secondary sending point of 1 expression is sent are identical as the information that primary sending point is sent for receiving end own local.
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| CN110167179B (en) * | 2019-05-29 | 2022-05-20 | 中南大学 | Method for prolonging service life of energy-limited intelligent sensing equipment based on radio frequency energy compensation |
| CN114630333B (en) * | 2022-03-16 | 2022-09-16 | 军事科学院系统工程研究院网络信息研究所 | Multi-parameter statistical learning decision-making method in cognitive satellite communication |
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|---|---|---|---|---|
| CN102014507A (en) * | 2009-09-04 | 2011-04-13 | 普天信息技术研究院有限公司 | User uplink resource scheduling method in HSUPA system |
| CN104661053A (en) * | 2013-11-22 | 2015-05-27 | 中兴通讯股份有限公司 | IPTV data processing method and system |
| CN105050196A (en) * | 2015-07-07 | 2015-11-11 | 上海交通大学 | Multi-user communication scheduling system and method based on full duplex relay caching |
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| KR100662611B1 (en) * | 2005-01-31 | 2007-01-02 | 삼성전자주식회사 | The dual-band voltage controlled oscillator using bias switching and multiplexing of output buffer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102014507A (en) * | 2009-09-04 | 2011-04-13 | 普天信息技术研究院有限公司 | User uplink resource scheduling method in HSUPA system |
| CN104661053A (en) * | 2013-11-22 | 2015-05-27 | 中兴通讯股份有限公司 | IPTV data processing method and system |
| CN105050196A (en) * | 2015-07-07 | 2015-11-11 | 上海交通大学 | Multi-user communication scheduling system and method based on full duplex relay caching |
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