CN1801800A - Media access control frame structure in wireless communication network - Google Patents
Media access control frame structure in wireless communication network Download PDFInfo
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Abstract
A wireless communication network medium accessing control frame structure, Which includes one down link frame and one uplink , above-mentioned down link frame containing broadcast stage frame and data service stage , above-mentioned broadcast stage containing one pilot frequency domain, one broadcast control domain, one accessing control domain one frame control domain , above-mentioned frame control domain divided into combined detecting frame control part, combined detecting/transmitting frame control part, above-mentioned uplink frame containing one channel state information reporting domain one data service domain, one wireless resource request domain, and one random accessing domain, Said invention reduces multi-user interference and raises mobile communication systematical capacity.
Description
(1) technical field
The present invention relates to the media access control frame structure in a kind of cordless communication network, the antenna that is used for the employing distributed coordination work of back 3 g mobile communication (B3G) system carries out the conglomeration detection simultaneously and unites emission.
(2) background technology
Mobile communication technology has experienced the three generations at present.3-G (Generation Three mobile communication system) (3rd Generation MobileCommunications System; 3G) be the mobile communication system that with all strength drops into exploitation, it can provide preceding two generation the product various wide-band-message business that can not provide, such as high-speed data, television image etc.3-G (Generation Three mobile communication system) will put goods on the market in recent years.
For higher-quality multi-medium data service also is provided when voice service is provided, back 3 g mobile communication (Beyond Third Generation has appearred in the communications field; B3G) notion of system.Along with the continuous growth of high-speed multimedia data business, thereby require multi-user interference further to reduce the capacity that improves mobile communication system.Utilize diversity technique to reduce multi-user interference generally speaking, the main method methods such as diversity, polarization diversity of having living space.When adopting diversity technique still can't solve some strong jammings, can adopt smart antenna or adaptive antenna array scheme to disturb with the intensity, the inhibition that strengthen useful signal.Wherein the distributed multi-antenna technology is considered to that one of technology of widely-used future is arranged most.
In addition, in communication system, channel condition information (Channel State Information; CSI), promptly path loss is a very important parameter.When receiving terminal is known CSI, just can adopt detection scheme adaptively.If transmitting terminal is known CSI, just can adjust transmission policy automatically, for example when deep fade, increase signal power.For the limited air resource of better utilization B3G system, people have proposed two kinds of solutions on the basis of distributed multi-antenna structure: a kind of is joint-detection (Joint Detection; JD), this scheme is meant to have many reception antennas physically, and receiving terminal (center cell CU or portable terminal MT) known channel condition information (CSI), and the different data flow of using above-mentioned CSI information butt joint receiving end to receive is carried out decorrelation; Another is to unite emission (Joint Transmission; JS), this scheme supposition transmitting terminal has been known CSI, and compensates because the relevant adverse effect of bringing of subchannel with precoding.
Above-mentioned B3G system generally adopts frequency division multiplexing (Frequency Division Duplex; FDD) pattern.In order to reduce intersymbol interference (the Inter Symbol Interference that high speed data transfer is brought; ISI), the down link in said system adopts OFDM (Orthogonal Frequency Division Multiplexing; OFDM) pattern, the up link in the said system adopt general multicarrier (General Multi Carrier; GMC).Adopt slotted mode when adopting said system to carry out transfer of data.Fig. 1 is an example that adopts said system.
In system shown in Figure 1, a plurality of antennas are same user's service, and for example antenna 1 all is portable terminal MT1 service to antenna 4.A plurality of users can launch or receive simultaneously, and for example MT1, MT2 can launch or receive simultaneously.
In down link, if portable terminal (Mobile Terminal; MT) can provide the joint-detection computing capability, both this terminal was that joint-detection moves receiving terminal (Joint Detection Mobile Terminal; JD-MT), then at one time can be with a plurality of from central location (Central Unit; CU) data flow of sending sends to this JD-MT.This JD-MT carries out decorrelation to received signal to obtain to send data.And send mobile receiving terminal (Joint Transmission MobileTerminal to uniting; JT-MT), when CU received CSI, this central location will carry out the adverse effect that precoding compensates wireless channel.
In up link, because therefore not corresponding coordination between each MT can only adopt joint-detection at the CU place.Some MT can launch simultaneously at same time slot, and CU can carry out decorrelation to the signal of different MT emissions by utilizing the CSI information of up link then.
Joint-detection above-mentioned in time obtains CSI information easily at receiving terminal, and CSI information is extremely important to the raising of combined detection performance timely.But adopt joint-detection need carry out complicated matrix operation and obtain received signal, therefore increased the computation complexity of receiving terminal, also increased the power consumption of receiving terminal.
The associating emission is then opposite with joint-detection, adopts the associating emission can significantly reduce the computation complexity of receiving terminal, reduces power consumption.But, because transmitting terminal need be waited for CSI information from receiving terminal, therefore compare with joint-detection, unite the signaling consumption of emission and CSI and postpone all to want big many, this information that also means CSI under quick decline situation is not really accurate, therefore can reduce the performance of associating emission.
Comprehensive above-mentioned situation as can be seen, joint-detection is applicable to fast fading channel, but receiving terminal need provide sufficiently high computing capability.On the other hand, unite the computation complexity that emission can be simplified receiving terminal, but to fast fading channel and inapplicable.
Not having the corresponding communication agreement in the prior art is that structure guarantees joint-detection and uses when uniting emission, so joint-detection and unite emission and can not use simultaneously, causes making full use of both advantages.
(3) summary of the invention
The purpose of this invention is to provide a kind of communication protocol, make this communication protocol of employing can carry out joint-detection simultaneously and unite emission, thereby can make full use of the advantage of above-mentioned two kinds of technology, and further reduce multi-user interference, improve the capacity of mobile communication system.Above-mentioned purpose of the present invention is realized by following scheme:
Medium access control downlink frame structure in a kind of cordless communication network is used for the antenna system of distributed coordination work, and this frame comprises broadcasting stage and data service stage, and the above-mentioned broadcasting stage comprises:
(1) pilot field is used for down channel and measures; Then
(2) broadcasting control domains, all portable terminals that central location is controlled to it in this territory send control information; Then
(3) access control territories, above-mentioned central location are broadcasted the radio resource request result in the previous uplink frame and are inserted the result at random to its above-mentioned all portable terminals of controlling in this territory; Then
(4) frame control domains comprise a joint-detection frame control section, are used for sending the joint-detection control information to above-mentioned all portable terminals that above-mentioned central location is controlled; A joint-detection/associating frame emission control section, be used for uniting the mobile receiving terminal of emission when above-mentioned central location has been reported the channel condition information of current down link when all, above-mentioned all portable terminals of controlling to above-mentioned central location send associating emission control information;
Above-mentioned data service stage bearing data service, in above-mentioned joint-detection frame control section data service time slot subsequently, above-mentioned central location sends to joint-detection in the phase I with the joint-detection data service and moves receiving terminal; In above-mentioned joint-detection/associating frame emission control section data service time slot subsequently, above-mentioned central location will be united the emission data service and be sent to the above-mentioned mobile receiving terminal of emission of uniting.
If above-mentioned central location does not send the joint-detection data service in the above-mentioned phase I, then above-mentioned unite emission data service be sent completely after, above-mentioned central location sends to above-mentioned joint-detection in second stage with remaining joint-detection data service and moves receiving terminal.
Above-mentioned joint-detection control information comprises the scheduling that current uplink and downlink isl frame structural information (for example receiving terminal in the number of time slot, each time slot), the scheduling of current descending chain circuit frame phase I joint-detection, current uplink frame send.
Above-mentioned associating emission control information comprises that current descending chain circuit frame unites the scheduling of the scheduling of emission, current descending chain circuit frame second stage joint-detection.
Begin to be greater than or to equal the two-way time of above-mentioned channel condition information and sum computing time of RRM from above-mentioned pilot field to the time interval that above-mentioned joint-detection/associating frame emission control section begins.Be meant above-mentioned central location pilot signal transmitted the two-way time of above-mentioned channel condition information, unite the time sum that above-mentioned channel condition information was measured and returned to above-mentioned central location to the emission portable terminal.
Medium access control uplink frame structures in a kind of cordless communication network is used for the antenna system of distributed coordination work, and this frame comprises:
(1) channel status information reports territory is used to unite the mobile receiving terminal of emission is reported channel condition information from current down link to central location;
(2) data business domains are used for bearing data service, and portable terminal sends to above-mentioned central location with data service in the data service time slot;
(3) radio resource request territories are used for all portable terminals that above-mentioned central location controls and send resource reservation request to above-mentioned central location;
(4) input fields at random are used for initiate portable terminal and register to above-mentioned central location with random fashion.
The order of above-mentioned medium access control downlink frame structure is followed successively by above-mentioned channel status information reports territory, above-mentioned data service territory, above-mentioned radio resource request territory, above-mentioned input field at random.
The order of above-mentioned medium access control downlink frame structure is followed successively by above-mentioned channel status information reports territory, above-mentioned data service territory, above-mentioned input field at random, above-mentioned radio resource request territory.
Core of the present invention is: the frame control domain is divided into joint-detection frame control section, joint-detection/associating frame emission control section, makes central location can in time obtain channel condition information, thereby can accurately unite emission.
Adopt media access control frame structure provided by the present invention to have the following advantages:
1. mac frame structure of the present invention be for the wireless network of spaced antenna custom-designed, use frame structure of the present invention, can use joint-detection simultaneously and unite emission, both advantages all are not fully exerted, use joint-detection simultaneously and unite emission network operation efficient is improved to greatest extent.
2. because joint-detection and to unite emission very high to the consumption of computational resource, energy resource adopts this method to select flexibly according to state of resources information, satisfy the demand of user to resource.
3. have only the associating transmitting users under the state of activation just to report CSI, resource is rationally utilized.
4. owing to,, thereby reduced signaling and transmitted cost only at specific group transmission signaling with user grouping.
(4) description of drawings
Fig. 1 is a typical B 3G system construction drawing, and wherein MT represents portable terminal, and ant represents antenna, and CU represents central location, and CUC represents the central location controller.
Fig. 2 is a media access control frame structure of the present invention, above a behavior down link media access control frame structure, below a behavior up link media access control frame structure.
Fig. 3 is the semiotic function key diagram that adopts down link media access control frame structure of the present invention.
Fig. 4 is the semiotic function key diagram that adopts up link media access control frame structure of the present invention.
(5) embodiment
Fig. 3 is for adopting the semiotic function key diagram of down link media access control frame structure of the present invention.In the downlink transmission of Fig. 3, portable terminal can divide does two classes: joint-detection moves receiving terminal and unites the mobile receiving terminal of emission.At a portable terminal when register the sub-district, can this portable terminal must be pointed out the ability (for example support joint-detection) that it can provide, central control unit is according to channel condition then, for example the factors such as translational speed of number of antennas, corresponding channel quality, terminal are carried out adaptive dynamic division to portable terminal, are divided into above-mentioned joint-detection and move receiving terminal (JD-MT 1 to JD-MT m) and unite the mobile receiving terminal of emission (JT-MT 1 to JT-MT n).In each frame, also can to joint-detection move receiving terminal and unite the emission mobile receiving terminal do corresponding adjustment.In the broadcasting control stage, central location is broadcasted all portable terminals, notifies their activation of appointment after dividing to unite the mobile receiving terminal of emission.Unite the information state information phase of the mobile receiving terminal of emission in uplink transmit accordingly to central location reporting channel state information result.
After the broadcasting control stage finished, central location moved receiving terminal to joint-detection and carries out downlink transmission at first according to arranged sequential.When sending to k time slot, central location receive all unite send the corresponding channel status information reports of mobile receiving terminal after, this central location will call resource management immediately and (comprise antenna, sub-band, time slot, power etc.), that arranges portable terminal unites the emission sequential, at joint-detection/associating frame emission control section above-mentioned arrangement is broadcasted then.Central location is finished the emission of launching mobile receiving terminal to uniting according to the sequential of arranging subsequently, promptly launches in JT time slot 1 to JT time slot j.If top joint-detection is not finished, then central location continues joint-detection is moved the remaining data service of receiving terminal (from k+1 time slot) transmission.
Begin to be greater than the two-way time of channel condition information and sum computing time of RRM from pilot field to the time interval that joint-detection/associating frame emission control section begins.
Fig. 4 is the semiotic function key diagram that adopts up link media access control frame structure of the present invention.In the channel status information reports territory, unite the mobile receiving terminal of emission with the fast as far as possible time, report the channel measurement result of pilot signal in the current descending chain circuit frame, i.e. channel condition information to central location.In the uplink transmit of Fig. 4, in case portable terminal is received pilot signal, portable terminal calculates the channel condition information that records with regard to beginning.Broadcasting the control stage receive to activate unite the appointment of launch mobile receiving terminal after, unite the measurement result of the mobile receiving terminal of emission accordingly to central location report channel condition information.All then portable terminals carry out the data service emission according to uplink frame structures and the scheduling from central cell broadcast in the down link.Because central location provides the joint-detection ability, several portable terminals can be in same time slot emission data.After data service sent, the portable terminal of each registration sent the Radio Resource reserve requests to central location.The central location that initiate portable terminal is then attempted in this sub-district is registered with random fashion.
In sum, adopt the media access control frame structure in a kind of cordless communication network of the present invention, the antenna system that is used for distributed coordination work, by the frame control domain being divided into joint-detection frame control section, joint-detection/associating frame emission control section, can make central location after in time receiving channel condition information, unite emission, use when having guaranteed joint-detection and having united emission, further reduce multi-user interference, improve the capacity of mobile communication system.
Claims (9)
1. the medium access control downlink frame structure in the cordless communication network is used for the antenna system of distributed coordination work, and it is characterized in that: this frame comprises broadcasting stage and data service stage, and the above-mentioned broadcasting stage comprises:
(1) pilot field is used for down channel and measures; Then
(2) broadcasting control domains, all portable terminals that central location is controlled to it in this territory send control information; Then
(3) access control territories, above-mentioned central location are broadcasted the radio resource request result in the previous uplink frame and are inserted the result at random to its above-mentioned all portable terminals of controlling in this territory; Then
(4) frame control domains comprise a joint-detection frame control section, are used for sending the joint-detection control information to above-mentioned all portable terminals that above-mentioned central location is controlled; A joint-detection/associating frame emission control section, be used for uniting the mobile receiving terminal of emission when above-mentioned central location has been reported the channel condition information of current down link when all, above-mentioned all portable terminals of controlling to above-mentioned central location send associating emission control information;
Above-mentioned data service stage bearing data service, in above-mentioned joint-detection frame control section data service time slot subsequently, above-mentioned central location sends to joint-detection in the phase I with the joint-detection data service and moves receiving terminal; In above-mentioned joint-detection/associating frame emission control section data service time slot subsequently, above-mentioned central location will be united the emission data service and be sent to the above-mentioned mobile receiving terminal of emission of uniting.
2. the medium access control downlink frame structure in a kind of cordless communication network according to claim 1, it is characterized in that: if above-mentioned central location does not send the joint-detection data service in the above-mentioned phase I, then above-mentioned unite emission data service be sent completely after, above-mentioned central location sends to above-mentioned joint-detection in second stage with remaining joint-detection data service and moves receiving terminal.
3. the medium access control downlink frame structure in a kind of cordless communication network according to claim 1 is characterized in that: above-mentioned joint-detection control information comprises the scheduling that current uplink and downlink isl frame structural information, the scheduling of current descending chain circuit frame phase I joint-detection, current uplink frame send.
4. the medium access control downlink frame structure in a kind of cordless communication network according to claim 1 is characterized in that: above-mentioned associating emission control information comprises that current descending chain circuit frame unites the scheduling of the scheduling of emission, current descending chain circuit frame second stage joint-detection.
5. the medium access control downlink frame structure in a kind of cordless communication network according to claim 1 is characterized in that: begin to be greater than or to equal the two-way time of above-mentioned channel condition information and sum computing time of RRM to the time interval that above-mentioned joint-detection/associating frame emission control section begins from above-mentioned pilot field.
6. the medium access control downlink frame structure in a kind of cordless communication network according to claim 5 is characterized in that: be meant above-mentioned central location pilot signal transmitted the two-way time of above-mentioned channel condition information, unite the time sum that above-mentioned channel condition information was measured and returned to above-mentioned central location to the mobile receiving terminal of emission.
7. the medium access control uplink frame structures in the cordless communication network is used for the antenna system of distributed coordination work, and it is characterized in that: this frame comprises:
(1) channel status information reports territory is used to unite the mobile receiving terminal of emission is reported channel condition information from current down link to central location;
(2) data business domains are used for bearing data service, and portable terminal sends to above-mentioned central location with data service in the data service time slot;
(3) radio resource request territories are used for all portable terminals that above-mentioned central location controls and send resource reservation request to above-mentioned central location;
(4) input fields at random are used for initiate portable terminal and register to above-mentioned central location with random fashion.
8. the medium access control downlink frame structure in a kind of cordless communication network according to claim 7 is characterized in that: the order of above-mentioned medium access control downlink frame structure is followed successively by above-mentioned channel status information reports territory, above-mentioned data service territory, above-mentioned radio resource request territory, above-mentioned input field at random.
9. the medium access control downlink frame structure in a kind of cordless communication network according to claim 7 is characterized in that: the order of above-mentioned medium access control downlink frame structure is followed successively by above-mentioned channel status information reports territory, above-mentioned data service territory, above-mentioned input field at random, above-mentioned radio resource request territory.
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| CN101826907A (en) * | 2009-03-02 | 2010-09-08 | 中兴通讯股份有限公司 | Multi-access mode notification method and transmitting device for wireless link information transmission |
| WO2010124451A1 (en) * | 2009-04-28 | 2010-11-04 | 上海贝尔股份有限公司 | Method and device for non-coherent multi-station multi-user joint transmission |
| CN101150564B (en) * | 2006-09-19 | 2011-11-02 | 华为技术有限公司 | Method for dividing frame structure, its realization system and a domain scheduling method |
| CN102598792A (en) * | 2009-11-06 | 2012-07-18 | 摩托罗拉移动公司 | Interference mitigation in heterogeneous wireless communication networks |
| WO2012130097A1 (en) * | 2011-03-31 | 2012-10-04 | 北京新岸线无线技术有限公司 | Resource request method, station, and central access point |
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| CN101617480B (en) * | 2007-02-22 | 2014-01-08 | 三星电子株式会社 | Method and system for configuring a frame in a communication system |
| US9370021B2 (en) | 2008-07-31 | 2016-06-14 | Google Technology Holdings LLC | Interference reduction for terminals operating on neighboring bands in wireless communication systems |
| CN101754329B (en) * | 2008-12-10 | 2013-06-05 | 华为技术有限公司 | Data transmission method, equipment and system |
| CN101826907A (en) * | 2009-03-02 | 2010-09-08 | 中兴通讯股份有限公司 | Multi-access mode notification method and transmitting device for wireless link information transmission |
| CN101826907B (en) * | 2009-03-02 | 2014-03-19 | 中兴通讯股份有限公司南京分公司 | Multi-access mode notification method and transmitting device for wireless link information transmission |
| WO2010124451A1 (en) * | 2009-04-28 | 2010-11-04 | 上海贝尔股份有限公司 | Method and device for non-coherent multi-station multi-user joint transmission |
| CN102301821A (en) * | 2009-04-28 | 2011-12-28 | 上海贝尔股份有限公司 | Method and device for non-coherent multi-station multi-user joint transmission |
| CN102301821B (en) * | 2009-04-28 | 2013-12-25 | 上海贝尔股份有限公司 | Method and device for non-coherent multi-station multi-user joint transmission |
| CN102598792A (en) * | 2009-11-06 | 2012-07-18 | 摩托罗拉移动公司 | Interference mitigation in heterogeneous wireless communication networks |
| US9025556B2 (en) | 2009-11-06 | 2015-05-05 | Google Technology Holdings LLC | Interference mitigation in heterogeneous wireless communication networks |
| CN103155672A (en) * | 2010-10-05 | 2013-06-12 | 诺基亚西门子网络公司 | Channel state information measurement and reporting |
| US9100868B2 (en) | 2010-10-05 | 2015-08-04 | Cellular Communications Equipment Llc | Channel state information measurement and reporting |
| WO2012130097A1 (en) * | 2011-03-31 | 2012-10-04 | 北京新岸线无线技术有限公司 | Resource request method, station, and central access point |
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