CN102752869A - Mobile stations and base station for communicating in wireless communication network - Google Patents
Mobile stations and base station for communicating in wireless communication network Download PDFInfo
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- CN102752869A CN102752869A CN2012102177543A CN201210217754A CN102752869A CN 102752869 A CN102752869 A CN 102752869A CN 2012102177543 A CN2012102177543 A CN 2012102177543A CN 201210217754 A CN201210217754 A CN 201210217754A CN 102752869 A CN102752869 A CN 102752869A
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Abstract
The invention relates to mobile stations and a base station for communicating in a wireless communication network and discloses mobile stations (200) and a base station (300) for communicating in a wireless communication network (100) as well as a method and computer programs for communicating in the wireless communication network (100). According to the invention, cell edge users subjected to difficulties under competitive channels are treated different from users without being limited on power and/or without being subjected to collision. A suggested solution for the problem is to carry out orthogonal scheduling on the communication of the channels, or to force the mobile stations (200) which successfully transit data to wait for a specified time period or to distribute the mobile stations (200) into different groups according to signal attenuation of the different mobile stations (200), thereby treating the cell edge users different from the users closer to the base station (300).
Description
The application is that application number is 200680056391.2, the applying date is on November 17th, 2006, denomination of invention is divided an application for the application for a patent for invention of " when channel quality parameter drops to predefined threshold value mobile radio station via separate uplink and base station communication when following ".
Technical field
The present invention relates to the Resource Allocation Formula in cordless communication network.
Background technology
Run through the development of cordless communication network, also comprise the development of mobile and self-organizing (ad-hoc) communication network, become the theme of different prioritization schemes to the problem of the effective radio resource allocated of user of using radio link.Parameter relevant in such prioritization scheme is the justice of user throughput, time of delay and radio resources allocation.Usually, different prioritization schemes is devoted to maximize one of these parameters, because there is conflict in they.The signaling of in cordless communication network, in user's radio resource allocated, carrying out is usually by MAC (medium access control) layer control, and it is in charge of between different user the visit to radio link.
Two traditional UL MAC commonly used (access control of up link medium) agreement principle is to the access of radio channel scheduling with based on the access of competing.Use is can begin transmission in Any user when having data to send based on the benefit of the UL MAC agreement of competition.This characteristic gives UL MAC agreement based on competition when load is low (and therefore the risk from two or more users' transmission collision is low) and has the advantage of low delay.Significant drawbacks of MAC agreement based on competition is conflict, promptly begins simultaneously when same user is transmitted data as two or more users in sub-district or the overlay area.Example based on the agreement of competing is Aloha, branch crack Aloha, CSMA (carrier sense multiple access), CSMA-CD (carrier sense multiple access of band collision detection), S-MAC (access control of transducer medium), T-MAC (overtime medium access control).
Yet, when load is high, the MAC agreement of scheduling, for example TDMA (time division multiple access), TRAMA (access of service adaptation medium) or FLAMA (stream consciousness medium insert framework) are better expressively aspect delay, throughput of system and collision probability.UL MAC agreement is often utilized based on resource competition and that be scheduled.Usually, the user is dividing the resource that is scheduled that is used in transfer of data for them then based on the channel scheduling request information of competition.
Such MAC agreement is at Dahlman; E. etc. " A Framework for Future Radio Acess " (being used for the framework that following radio inserts) is proposed; It is devoted in the WINNER cordless communication network radio resource allocated between a plurality of users; Some users share uplink channel in this network, and are that the transmission on this uplink channel both can be based on competition or also can be scheduled.The user can be in the channel resource request based on competition, and the base station can be through being used for following transfer of data to the relative users assigned resources and responding on the channel of scheduling.The user can also incidentally transmitted (piggback) on ongoing transfer of data with dispatch request on the channel that up link is scheduled.
Further, US number of patent application US2006/0050742 has described wireless communication system, has wherein advised comprising based on the superframe structure in the time domain of the transmission cycle (time slot) of competition and the transmission cycle that avoids competing.During the transmission cycle that avoids competing, the user is in the channel that is scheduled, and they competed during the cycle based on competition simultaneously.
Other MAC agreement based on competition and scheduling is described in the no.US6240083 of US patent Wright etc., wherein the base station periodically on the broadcast channel on radio link all mobile devices transmit control message.Such control messages comprises the type and size of the transmission window that is used for uplink channel and the identifier of the mobile device that transmission window is assigned to.Yet disclosed MAC agreement is that CDMA is special-purpose in US6240083.
Usually, when two users conflicted on the channel based on competition, the base station was merely able to correctly decode the strongest signal.But more weak signal will be usually not decoded and this message must repeating transmission after some (normally at random) duration.If the signal of conflict has similar identical received power, then two signals are all lost in collision very big possibility are arranged.But because two users retransmit its message after some (at random) stand-by period, the possibility that same subscriber is conflicted again can step-down.This for example is described in two patent document US2006/0050742 and US6240083.
Yet above-mentioned MAC agreement has a common problem.Be positioned under the situation away from the position of base station the user, signal will always be received with low-power.If the load in the system is high, then have very big possibility be Cell Edge User will be almost always with the transmission collision of a certain other Cell Center User that receive with higher-wattage.Even the control of certain (open loop or closed loop) power is employed with balance from the received power of user and remote subscriber nearby, arrives its Power Limitation and so again can not increase the user of its transmitting power always existing.Under such Power Limitation scene, the message from Cell Edge User when load is high will be difficult to arrive the base station, and this is because it will always failed in the nearer user's in base station competition with other.This forces, and covering applies unwanted restriction to system.
Therefore, target of the present invention is to solve at least some problems in the prior art.
Summary of the invention
This target realizes through the mobile radio station that is used for communicating by letter at cordless communication network; Comprise at least one receiver and at least one reflector, be used for the monitor communications network activity first module, be used for detecting in Unit second of the conflict of communication network and be used for confirming Unit the 3rd of the parameter of the channel quality on the expression radio channel; Wherein drop under the predefined threshold value and/or when the estimated probability of conflict during when the parameter of the channel quality of expression on the radio channel above predefined threshold value, said mobile radio station be arranged for cordless communication network in the base station communicate by letter via independent radio channel.
The advantage of such mobile radio station is mobile radio station and base station communication, and can then therefore not have Power Limitation with other nearer mobile radio station competition radio resources are possible from the base station in base station coverage area.Another advantage according to mobile radio station of the present invention is that needs are not designed for the system of poor scene, and wherein Cell Edge User must be able to be communicated by letter on non-orthogonal channel.This will cause the better covering of system, and this will be converted into than low system cost.
What can add is that it can be the quadrature schedule request channel that above-mentioned mobile radio station can be set up the individual channel of communicating by letter above that with the base station.
Said mobile radio station also can be arranged for, and based on the conflict that is detected, waits for that the foundation of said base station is used for the independent radio channel of communicating by letter between said mobile radio station and the said base station.If yet successfully set up this independent radio channel, mobile radio station can, based on detected conflict on RACH (RACH) to the transmission resource of base station dispatch request.For example, this can be between mobile radio station and base station the traffic cases on the radio channel because the high capacity in the network and useful under the situation of difficult.Use RACH will bring benefit as interchangeable channel, promptly mobile radio station will arrive the base station under these circumstances, and this is because the RACH major part is used to control signaling and possibility nonoverload.
According to a further aspect in the invention; Target of the present invention realizes at the mobile radio station that cordless communication network is communicated by letter through being used for; Comprise at least one receiver and at least one reflector, be used for the monitor communications network activity equipment, be used for detecting at the equipment of the conflict of communication network and be used for confirming the device of the parameter of the channel quality on the expression radio channel, wherein it is arranged for transmitting radio resource request when said mobile radio station does not have data to send.
The above-mentioned mobile radio station of mentioning embodiment according to the present invention, this radio channel can comprise the channel based on competition.
Radio resource request can for example comprise the scheduling of resource request, and it can comprise the dispatch request that is used to suppose following radio resource demand in some cases.
Like this, form contrast with known technology, the mobile radio station that experiencing conflicts maybe possibly experience conflict will be estimated following resource requirement and it will be signaled to the base station.When a certain after a while, being carved with data and will transmitting, this has increased the possibility that radio resource can be used for the mobile radio station of being discussed.
In addition, mobile radio station may further include at least one transmission buffer and is arranged for transmitting and scheduling request when at least one transmission buffer is sky.
An embodiment according to above-mentioned mobile radio station; Said mobile radio station is arranged for; In case receive scheduling of resource permits from said base station; Whether there are data to send and wherein said mobile radio station further is arranged for receiving said scheduling of resource and permits the said mobile radio station in back and do not have data to transmit if verify it, just to said base station transmits new resources dispatch request to said base station.After this manner, when experience conflict maybe possibly experience the mobile radio station of conflict actual have some data will be to base station transmits the time possibility of available radio resource will increase.
This new scheduling of resource request possibly have different form and for example with the scheduling of resource message with data initialization together, on the reservation channel of scheduling, is transmitted.
According to another embodiment of above-mentioned mobile radio station, the radio resource request that is transferred to the base station can comprise that the indication mobile radio station no longer includes the priority flag that data will be sent.Use this priority flag also will have following additional advantage, promptly have mobile radio station that critical data will send to give higher priority than the mobile radio station of the experience conflict that only has lower-priority data to transmit.
What can add here is that the above-mentioned mobile radio station of mentioning can be positioned at the edge of base station coverage area according to the present invention.Usually, possibly be positioned at from the nearer mobile radio station in base station with other at these locational mobile radio station great majority and conflict or competition failure on based on the channel of competition.
Still according to a further aspect in the invention, target of the present invention realized in the base station that cordless communication network is communicated by letter through a kind of being used for, and comprised at least one receiver and at least one reflector; The first module that is used for monitoring wireless communication network activity; Be used for detecting Unit second and Unit the 3rd of the parameter that is used for confirming the channel quality on the expression radio channel of the conflict of communication network, wherein said base station is arranged for being established to channel quality and drops under the predefined threshold value and/or the probability of its conflict surpasses the radio channel of scheduling of the mobile radio station of predefined threshold value.
For example, this radio channel that is scheduled can comprise the orthogonal wireless radio channel.By this way; To be detected and can obtain the radio resource on independent radio channel by the base station at the inconvenient mobile radio station of competitive resource on the radio channel, they need not competed with other less mobile radio stations that conflicts that possibly experience on this independent radio channel.
Naturally, for the base station, before being established to the radio channel of or the more scheduling of multiple mobile station, verify said one or more multiple mobile station whether have data to transmit be possible.
With regard to above-mentioned channel quality, said channel quality can represented aspect the parameter of SINR (Signal Interference and Noise Ratio), ISI (intersymbol interference), RSSI (reception signal strength indicator), path loss, geometrical factor or a certain other expression channel qualities.
According to a further aspect in the invention, target of the present invention realized in the base station that cordless communication network is communicated by letter through a kind of being used for, and comprised at least one receiver and at least one reflector; The equipment that is used for the monitor communications network activity; Be used for detecting equipment and the device of the parameter that is used for confirming the channel quality on the expression radio channel of the conflict of communication network, wherein said base station be applicable to from said cordless communication network one or more multiple mobile station receive data and force said one or more multiple mobile station after the transfer of data of success with the predefined latency time period of any other data transfer delay.
Through doing like this, the base station will stop one or more multiple mobile station often take radio channel and can between the mobile radio station in its coverage or the sub-district, distribute available radio resource more equably.
According to other embodiment according to base station of the present invention, said base station receives data applicable to other mobile radio stations from said cordless communication network during the said predefined time cycle.
Still according to according to another embodiment of base station of the present invention, said base station is applicable to one in said cordless communication network or the information of multiple mobile station transmission expression latency time period more.Like this, each mobile radio station in the cordless communication network will know when send its next data to the base station.This information can also be sent straight to each and successfully transmit its data and give the mobile radio station of base station or send in the cordless communication network one or multiple mobile station more together with ACK/NACK (affirmation/unconfirmed) signaling.
Other possibilities of in cordless communication network, sending the information of relevant each mobile stations wait time can be that the base station is applicable to this information of transmission on control channel.This channel for example can be special use or broadcast channel.
Now, it also can be possible for the base station, treating the above-mentioned latency time period of mentioning as deterministic parameter or stochastic variable.
Still according to a further aspect in the invention, target of the present invention realizes in the base station that cordless communication network is communicated by letter that through a kind of being used for this base station comprises at least one receiver and at least one reflector; The first module that is used for the monitor communications network activity be used for represents from one of cordless communication network or Unit second of the parameter of the signal quality of the reception signal of multiple mobile station more; Wherein said Unit second be arranged for collecting its signal quality in the mobile radio station measured be lower than one of the predefine value or more multiple mobile station become at least one first mobile radio station group; And collect its signal quality measured be higher than one of said predefine value or more multiple mobile station become at least one second mobile radio station group, wherein the base station is arranged at least one second radio channel, communicating by letter at least one first radio channel and with said at least one second mobile radio station group with said at least one first mobile radio station group.
This will have such advantage, mobile radio station and the mobile radio station competition with comparable higher signal quality that the mobile radio station that promptly its signal quality is low is competed with the mobile radio station that has signal quality that can be lower equally and had high signal quality.Like this, the mobile radio station with high signal quality will can not won victory automatically and had the mobile radio station of low signal quality in those, and those mobile radio stations with low signal quality will have fair opportunity and obtain the radio resource from the scheduling of base station.
Above-mentioned base station embodiment according to the present invention, said at least one first and second radio channel can be based on the radio channel of competition, and it can be or can not be mutually orthogonal.
Possible is, another embodiment of base station according to the present invention, and said base station is applicable to that adaptive its transmitting power of mobile radio station in the mobile radio station that forces in first group and second group is with the difference of smooth signal attenuation between first and second groups.This better chance of mobile radio station that will have low signal quality is obtained the radio resource that is scheduled from the base station.
Still according to a further aspect in the invention, target of the present invention be through a kind of in cordless communication network the method for radio resource allocated realize, may further comprise the steps:
A) user traffic of supervision on radio channel,
B) collect the parameter of the channel quality on the expression radio channel for one in the cordless communication network or more users,
C) based on the parameter of the channel quality of expression on the radio channel, on radio resource separately, set up with said user in channel quality drop to communicating by letter of under the predefined threshold value or more users,
D) on said independent radio resource, receive the scheduling of resource request, and
E) be received in the data of transmitting on the radio resource of scheduling of allowance.
Advantage according to the method for the invention be similar according to the advantage of mobile radio station of the present invention and base station.
According to one embodiment of the method for the invention, step c) further comprises substep:
C1) for the said user's dispensing quadrature private resource in the cordless communication network.
Still according to the method for the invention another embodiment, the user in the cordless communication network only can send the scheduling of resource request on said quadrature private resource.This will have and be reduced in the advantage based on the load on the channel of competition that generally is used to send the scheduling of resource request.
Still according to the method for the invention another embodiment, the said dispensing of quadrature private resource can comprise dispatching lastingly for said one or more users dispensing in the cordless communication network and permit or dedicated channel.
An equal possible embodiment of the inventive method can be that step c) can comprise the lasting scheduling radio channel that allows said user on said independent radio resource, to send dispatch request periodically and keep watch on the radio resource request of the said user's of being used for scheduling.
According to a further aspect in the invention, target of the present invention be through a kind of in cordless communication network (100) device of radio resource allocated realize, comprising:
A) be used to keep watch on the parts of the user traffic on radio channel,
B) be used for collecting the parts of the parameter of the channel quality on the expression radio channel for one of cordless communication network or more users,
C) be used for parameter based on the channel quality of expression on the radio channel, on radio resource separately, set up with said user in channel quality drop to one or the parts of communicating by letter of more users under the predefined threshold value;
D) be used on said independent radio resource receiving the parts of scheduling of resource request, and
E) be used to be received in the parts of the data of transmitting on the radio resource of scheduling of allowance.
This device is specially adapted to carry out the step according to the method for the invention described above.
Of the present invention these will more easily be understood through following detailed description with reference to accompanying drawing with other advantages.
Description of drawings
Fig. 1 has set forth the problem of uplink collision in the cordless communication network.
Fig. 2 shows the embodiment according to mobile radio station of the present invention.
Fig. 3 shows the embodiment according to base station of the present invention.
Fig. 4 has set forth the flow chart according to the method step of the first embodiment of the present invention.
Fig. 5 has set forth the flow chart of step according to a second embodiment of the method according to the invention, wherein continues orthogonal resource request channel and is assigned in cordless communication network based on the problematic user of competition on the resource request channel of competition.
Fig. 6 has set forth the flow chart of step according to a third embodiment of the method according to the invention, wherein under the situation when the free transmission buffer of portable terminal the time portable terminal incidentally transmission resource request to carry out transfer of data.
Fig. 7 has set forth the flow chart that a fourth embodiment in accordance with the invention is carried out the required step of Client-initiated poll.
Fig. 8 has set forth the flow chart that according to the method for the invention the 5th embodiment carries out the required step of controlled transfer of data time of delay.
Finally, Fig. 9 has set forth the 6th embodiment that illustrates according to the method for the invention, depends in the radio communication one or the flow chart of the step taked of the path loss scheduling resource of multiple mobile station more.
Embodiment
Fig. 1 has set forth the general case in the cordless communication network 100, and the first and second mobile radio station A and B are positioned near the center of overlay area that base station 110 covers or sub-district 130 and the 3rd mobile radio station C is positioned at cell edge, away from base station 110.The 3rd mobile radio station C also is positioned at second overlay area of second base station, 120 coverings or the edge of sub-district 140.In this sub-district 140, the 4th mobile radio station D is positioned near 140 centers, sub-district.At present; If the efficient uplink transmission that mobile radio station A and B need simultaneously data that transmission is scheduled and them not to receive base station 110 is permitted; In order to be assigned such allowance, they must send dispatch request to base station 110 on based on the channel of competition.If the transmission of these dispatch request is transmitted on same schedule request channel simultaneously, then they will conflicts and the base station may not detect this two dispatch request and transmits.In addition, if the 3rd mobile radio station C by Power Limitation then it can not transmission signals, this signal 110 is received in the base station, has SIR (signal-to-jamming ratio) level that needs.On the contrary; Because the first and second mobile radio station A and B are positioned at the position nearer apart from base station 110; To experience much little path loss to the base station 110 from the signal of the first and second mobile radio station A and B, therefore be received with the signal that B transmits, have the SIR level of needs from mobile radio station A.But mobile radio station A or B will win competition and base station can the decode dispatch request of sending from mobile radio station A or the B dispatch request that can not decode and send from the mobile radio station C of Power Limitation in this case.On based on the schedule request channel of competition under the situation of high capacity; The 3rd mobile radio station C will almost always conflict with a certain other users that have than small path loss; Therefore the 3rd mobile radio station C will almost never win competition, and thereby will not be assigned any ul transmissions allowance on (quadrature) transmission channel of scheduling.When the 3rd mobile radio station C and the 4th mobile radio station D on based on the channel of competition competition with when its scheduling of resource requests are sent in second base station 120; The 3rd mobile radio station C is positioned near 140 edges, second sub-district because the 4th mobile radio station D is positioned near 140 centers, sub-district, and same scene also possibly take place in sub-district 140.
Exemplary embodiment according to mobile radio station 200 of the present invention has been shown in Fig. 2.In this example, mobile radio station 200 is equipped with receiver and the reflector 210 that is used to receive and send data and control information.Naturally, receiver and reflector 210 also can be two independent unit.Further; Mobile radio station 200 can comprise the first module 220 that is used for monitoring wireless communication network 100 activity, and it can detect whether another mobile radio station is sending data, operating in the standby mode perhaps such as in sleep pattern in the cordless communication network 100.Communicate by letter with transmitter unit 210 with the receiver in mobile radio station 200 in this unit 220.
Finally, mobile radio station 200 can also comprise transmission buffer 250, wherein stores the data that will be transmitted at once.
Turn to Fig. 3 now, be suggested according to the embodiment of base station 300 of the present invention.The mobile radio station 200 of similar Fig. 2, base station 300 comprise and are used to receive data and control information and send the receiver and the reflector 310 of data and control information to mobile radio station and other base stations.In this example, base station 300 only comprises a receiver and reflector 310, but its can comprise with being equal to be used to receive with the transmission diversity purpose more than one receiver and reflector.
Additionally, base station 300 can comprise the first module 320 that is used for monitoring wireless communication network 100 activity, and for example, it can detect in cordless communication network 100 one or the state of multiple mobile station more via receiver and reflector 310.These states can be transmit, a certain other states that free time or sleep or mobile radio station possibly be in.
Additionally, the base station can comprise second unit 330 of the conflict that is used for detecting communication network.This unit is connected to receiver and reflector 310; Also possibly be connected to the first module 320 that is used for monitoring wireless communication network 100 activity; When one or when more multiple mobile station conflicts in cordless communication network 100 this unit have the function of detection; And possibly be established to the orthogonal channel of these mobile radio stations, they can transmit their radio resource reservation request via this orthogonal channel.This will explain after this specification in more detail.
Except first and second unit 320 and 330, base station 300 can also comprise the 3rd unit 340 of the parameter that is used for the channel quality on definite expression radio channel.Be similar to the 3rd unit 240 in the mobile radio station 200 among Fig. 2; This unit can pass through measurement parameter; For example SINR, ISI, the decay on radio channel come the calculating channel quality, perhaps through to one or more multiple mobile station send test massage and confirm that according to the response of said one or more mobile radio stations these parameters come certain other parameter of represents channel quality.Another possibility can be to from one or more the data-signal that receives of multiple mobile station come directly to carry out measurement.Use to one or the measurement parameter of multiple mobile station more in the cordless communication network, one or the more conflict of multiple mobile station or the possibility of conflict can be confirmed in cordless communication network 100 in second unit 330.
In addition, second unit 320 that is used for monitoring wireless communication system activity is connected to third and fourth unit 330 and 340 that is used for detecting the conflict of cordless communication network and is used for confirming the parameter of the channel quality on the expression radio channel.
What can add is that first, second can also be integrated in the independent unit with the 3rd unit 320,330 and 340.Integrated advantage can be can save the space on the chip if said units is structured on the IC.Similarly, first, second in the mobile radio station 200 also can be integrated in the independent unit with above-mentioned same mode with the 3rd unit 220,230 and 240.
Turn to Fig. 4 now, flow chart has been set forth the method step of first embodiment according to the method for the invention, wherein based on the problem on the scheduling channel of competition the time, plays an active part confirming from the base station 110 of Fig. 1.
In step 400, for example keep watch on based on the traffic on the schedule request channel of competition from the base station of Fig. 1 110 base station.Any mobile radio station is allowed to send at any time the dispatch request that need be used to transmit the radio resource of data for it on this channel.Supervision based on the channel of competing can comprise the CQI (CQI) of detection from each mobile radio station in the overlay area 130 of base station 110.
Additionally, base station 110 can be detected the power of the data-signal that receives from each mobile radio station and measure the decay on the radio channel.Use is from the power of mobile radio station reception and measured decay, and the Power Limitation of mobile radio station can be determined.Power Limitation means because the decay on the radio link; Mobile radio station only can increase transmitting power up to a certain maximum transmit power limit; This causes this maximum power to be not enough to transmit the situation of such signal under the situation of height decay, and this signal is detected by base station 110 with target SIR.
Can be based on the load on the radio link by other parameters of base station monitoring; Promptly there is how much percentage available bandwidth to be used for the transfer of data of mobile radio station of the overlay area of base station 110; And based on the activity of mobile radio station or base station 110, if promptly mobile radio station or base station are in transmission, free time, standby mode or a certain other activity patterns.
If in step 410; If the parameter of the expression channel quality of above-mentioned collection drop to be lower than a certain predefine threshold value or from one of the data of these calculation of parameter indication or more multiple mobile station with the sub-district 130 of first base station 110 the competition of other mobile radio stations in when problem is arranged, the mobile radio station of the corresponding Power Limitation of 110 decision polls in step 420 base station.By this way, orthogonal resource is assigned to these mobile radio stations, above that they can with base station communication.
Now, if step 430 by one of poll or more multiple mobile station have the data will be to base station 110 transmission, then in step 440, base station 110 on the orthogonal uplink resource from one or manyly received the radio resource dispatch request by the mobile radio station of poll.
If all do not had data to transmit by the mobile radio station of poll in addition, then in step 420 base station once more one of poll or more before the multiple mobile station in step 432 base station waits predetermined amount of time.
In step 440, base station 110 receives the scheduling of resource request from one or more being detected as at the problematic mobile radio station of channel competition based on competition more on the orthogonal resource of new assignment.
Next, in step 450, from one or more the scheduling of resource request of multiple mobile station permitted, thereby be the transfer of data reservation of resource of those mobile radio stations.
At last, in step 460, the data from the mobile radio station transmission on the radio resource of scheduling are received, and the supervision of step 400 based on the channel of competition got back in base station 110 subsequently.
What can mention here is that flow chart among Fig. 4 has been set forth a circulation according to first embodiment of the inventive method.Equally, this flow chart has only been described in the base station 110 and one or the part communication of more relevant first embodiment according to the inventive method between the multistation.Except 400 keep watch on based on the traffic on the channel of competition, the base station is also sent data and is received data from other mobile radio stations to other mobile radio stations, other mobile radio stations collision problem not on based on the channel of competition.
Fig. 5 has set forth step according to a second embodiment of the method according to the invention, and it has done to revise a little to the method among Fig. 4.
In step 500, be similar to first embodiment among Fig. 4, the parameter of expression based on the quality on the schedule request channel of competition kept watch in base station 110.
If have mobile radio station to be detected as that competition has problem on based on the channel of competition in step 510, then in step 520, these mobile radio stations by base station 110 non-based on the schedule request channel of competition on the lasting scheduling of assignment permit.By this way, the direct access communication channel between problematic mobile radio station and the base station is established on based on the channel of competition.These mobile radio stations no longer need have its dispatch request of mobile radio station competition of more favourable transmission conditions with other.
If, on the other hand, do not detect the mobile radio station of conflict in step 510 base station 110, then it abides by the data that common program is permitted the scheduling of resource request and transmitted from (mobile radio station) in step 514 reception to mobile radio station in step 512.Thereafter, base station 110 turns back to step 500, i.e. monitoring channel mass parameter again.
In step 530, base station 110 is in order to keep watch on the scheduling channel of allowance from the periodic scheduling request of the mobile radio station that has been assigned lasting scheduling allowance.
If in step 540, dispatch request is received by base station 110 on lasting scheduling channel, then one or more multiple mobile station be assigned radio resource in step 550.
At last, in step 560, from one or more the transfer of data of multiple mobile station received by base station 110, base station 110 turns back to the channel monitoring step of step 500 subsequently.Certainly, the base station is not only kept watch on the channel based on competition passively, but also receives data and transmit data to mobile radio station from mobile radio station, and these mobile radio stations do not experience the conflict in the cordless communication network 100.
Fig. 6 has set forth method step according to a third embodiment of the method according to the invention.Here, the embodiment of this method is from being understood based on the angle of the mobile radio station competed of scheduling of resource request channel of competition.
In step 600, one or more multiple mobile station (B) to base station 110 scheduling resources transmitted requests.
In following step 610, said one or more multiple mobile station 110 receive from the base station as the grant of resources of responding.
Simultaneously, in step 620 said one or the situation on the multiple mobile station monitor uplink channel more.
If in step 630; It knows the difficult transmission conditions on radio link; Be that they experience conflict continually on based on the channel of competing, the data that they select to transmit on up link with its hope in step 640 " are incidentally transmitted " dispatch request together.This dispatch request of incidentally transmitting comprises the resource request of the following radio resource demand that is used to suppose, in case they are required.
Here it is worth mentioning that when the transmission buffer of in question mobile radio station is sky incidentally the dispatch request of transmission is published.Requested resource can be only to support the so little size of the transmission of future scheduling request.The base station can be come being ready to use in these requests of following quadrature dispatch request resource to be different from the common dispatch request that is used for transfer of data, promptly through before permitting asking to its user with empty transmission buffer of report, allowing bigger delay.Opposite, incidentally the dispatch request of transmission only just is sent out when the transmission buffer of mobile radio station comprises the data that are sent out in prior art system.
In addition, if one or more multiple mobile station up link based on the schedule request channel of competition on without successive what conflict, then they continue to base station 110 their data of transmission in step 680.
Then, in step 650, mobile radio station B receives the grant of resources from base station 110.
In following step 660, and before sending any data to base station 110, said one or more the multiple mobile station inspection its whether have data to send.
Under the situation that does not have data to send, in step 670, mobile radio station sends for its scheduling of resource request in the resource that possibly need in the future again.Here should also be mentioned that; Since this moment one or more multiple mobile station do not have data to send; It can select to send the scheduling of resource request message with different message format, because need be included in amount of information in the resource request message less than the normal condition that will send as data.About the information of buffer state and data priority is unwanted under the situation that does not have data in transmission buffer.
Yet if there are data to send, mobile radio station continues to base station 110 transmission data in step 680.
After this, all processes turn back to initial step 600.
Yet it should be noted that; It also is possible and known when mobile radio station can not empty transmission buffer through the resource of using current allowance, using the resource request of incidentally transmission in the prior art, and no matter whether collision problem is arranged on uplink channel.One or more multiple mobile station have under the situation that more multidata will be transmitted, it can always select in current transmission, to add dispatch request.Because it is faster and have more robustness, so do like this.Yet, with respect to known technology, be transmitted, and this step is only being carried out based on the mobile radio station of the collision problem on the schedule request channel of competition by experience in step 670 dispatch request when transmission buffer is sky.
Yet note; Usually at one or exist before more multiple mobile station turns back to step 600 and be used for one or the time slot of multiple mobile station more because in this embodiment according to the method for the invention when having the data that will send to base station 110 one of step 600 or more multiple mobile station with transmission resource request only.
Additionally; One or more multiple mobile station can add the priority flag (not shown) to the scheduling of resource request; Wherein this priority flag can indicate when base station 110 to one or more during the resource of multiple mobile station allocation schedule, one or more multiple mobile station with the actual probability that has data to send.
Some mobile radio stations send priority flags together with they the scheduling of resource request some then can not be equal feasible like this.By this way, base station 110 can postpone then those scheduling of resource requests are not comprised one of priority flag or the grant of resources of multiple mobile station more, promptly give their low priorities, and be more prone to have the scheduling of resource request of priority flag.At first when all scheduling of resource requests that have a priority flag have been processed, the base station begins to permit from those or the more multiple mobile station scheduling of resource request that does not have priority flag of sending.Yet, when the load on the uplink radio channels is high, will need the longer time to receive grant of resources from mobile radio station 110 for those mobile radio stations.
Fig. 7 is one or the angle of the multiple mobile station method step of having set forth the method for a fourth embodiment in accordance with the invention more from cordless communication network 100.
Be similar to previous embodiment, step 700 said one or more multiple mobile station keep watch in up link based on the traffic cases on the channel of competition.
If in step 710; One or more multiple mobile station detect it and arrive base station 110 and have any problem; And it conflicts on the channel of being everlasting based on competition, then step 720 said one or more multiple mobile station wait for that predefined time quantum is with by base station 110 contact and assignment orthogonal uplink channels.
In addition, if do not carry out with communicating by letter of base station 110 with conflicting, then step 714 said one or more multiple mobile station send the scheduling of resource requests to base station 110.In step 716, one or more the multiple mobile station receiving scheduling permit and give base station 110 with its transfer of data in step 760.
Now, if be exceeded at the predefined time quantum of step 730, less than the poll from base station 110, it possibly not take place owing to multiple reason, in step 732 said one or more multiple mobile station transmission scheduling of resource request on RACH (RACH).Then, in step 734, said one or more multiple mobile station receive from the scheduling of resource of base station 734 and permit and continue to base station 110 transmission data in step 760.
Because the for example high capacity on the uplink scheduled channel or owing to from other dispatch request of the mobile radio station that the higher priority traffic will send is arranged, base station be the user that on the channel based on competition, conflicts of poll not.
Equally, RACH should be designed so that allow all users to send its dispatch request.Usually, more much lower at the collision probability on the RACH than being designed on other channels that send scheduling of resource request or data based on competition.In addition, the amount of radio resources of RACH is low and the random accessing message number usually much smaller than other based on competitive channel on the scheduling request information number.
If, on the other hand, one or more multiple mobile station during predefined latency time period, receive message really from the base station, then said one or more multiple mobile station on the quadrature scheduling channel that keeps by the base station, send resource request in step 740 to base station 110.
In step 750, one or more multiple mobile station before 110 receive scheduling of resource and permit from the base station on the quadrature scheduling channel mentioned.
At last, in step 760, said one or more multiple mobile station to its data of base station 110 transmission, subsequently one or more multiple mobile station turn back to monitoring step 700.
Turn to Fig. 8 now, the method step of method is according to a fifth embodiment of the invention set forth.
Here, be similar to some previous embodiment, at step 800 base station monitoring uplink scheduling request channel according to the inventive method.
In step 810, base station 110 from one or more multiple mobile station receive data.If intactly and correctly received in step 820 transfer of data, then base station 110 forces said one or more mobile radio stations that has successfully transmitted its data postpone any other transfer of data and resource request is transmitted the predefined time cycle in step 840.
This predefined time cycle or stand-by period can be to depend on system load qualitative parameter really, or also can be stochastic variables, and wherein, for example under the situation that system load can be characterized by Gaussian distribution, mean value and variance depend on system load.Stand-by period can be broadcasted on down link or can directly it be signaled to each mobile radio station of being discussed by base station 110.
As interchangeable, base station 110 can be calculated for one or more successful stand-by period of each and send it to the mobile radio station of being discussed via the control channel (not shown) in the mobile radio station of base station 110 its data of transmission.
Interchangeable as another, base station 110 can be reinstated stand-by period parameter and the ACK/NACK that is used to control uplink HARQ (mixed automatic repeat request) that on downlink channel, sends (confirming/unconfirmed) signaling one signal and send.This will guarantee that system always is useful on the available resources of transmitting and scheduling request on the nonopiate resource based on competition.
If in the overlay area of base station 110 one or more the transfer of data of multiple mobile station is unsuccessful, base station 110 in step 830 to one that is discussed or more multiple mobile station issue ARQ (the automatic repetitive requests of ARQ-) order.Then, said one or more multiple mobile station transmit its data again in step 810.
At last; In step 850; For one or more the multiple mobile station latency time period over and done with after, base station 110 receives by the data of these mobile radio stations transmission and turns back to monitoring step 800, wherein it is kept watch on based on the traffic cases on the channel of competition again.
Naturally, the method step of in Fig. 8, describing has only been described the piecemeal activity of base station 110, except keep watch on channel in step 800, also comprise based on competition from cordless communication network 100 one or more multiple mobile station receive data and to its transmission data.
Fig. 9 has set forth the 6th embodiment that illustrates according to the inventive method and has depended in the radio communication one or the flow chart of the step taked of the path loss scheduling resource of multiple mobile station more.
In step 900, base station monitoring is based on the uplink channel of competition.Then, in step 910, the path loss of each mobile radio station is calculated in base station 110, and the base station receives data from this mobile radio station.The path loss of mobile radio station can be the decay of on 110 path from the mobile radio station to the base station, having experienced from the signal of corresponding mobile radio station that for example is defined as the dB form.For the base station can estimating path loss, it need be known mobile radio station and on which power, transmits.This information possibly be sent out with the scheduling of resource request together.
If, in step 920, one or more the path loss of multiple mobile station be higher than a certain predefine value, then these mobile radio stations are gathered in the so-called competition group.In this example, be placed in " high path loss group " and at the mobile radio station that step 930 has the path loss that is higher than a certain threshold value and be placed in " low path loss group " at the remaining mobile radio station of step 925.Here should also be mentioned that mobile radio station can be divided into more than two competition groups and can have that path loss with mobile radio station compares more than one threshold value.
In step 940; Base station 110 is the nonopiate schedule request channel of each competition group assignment; In this case; It can be that a schedule request channel is used for " high path loss group " and a schedule request channel is used for " low path loss group ", and gives each relevant mobile radio station with this message transmission.By this way, each mobile radio station in the overlay area 120 of base station 110 will be known it and belong to which competition group and which scheduling of resource channel it should use when sending its scheduling of resource request.
Next, in step 950, base station 110 is from being assigned to first or second one of the mobile radio station receiving scheduling request based on the group of competition.
After this, in step 960, whether base station 110 one of verification or the more multiple path loss of the mobile radio station of dispatch request of sending change from the measurement of obtaining in step 920.
If path loss changes, then in step 965 base station with one or more multiple mobile station be assigned to another competition group and will dispatch and permit being transferred to one or multiple mobile station more in step 967.
After this, in step 980, base station 110 receives from one or the data of multiple mobile station transmission more.
Yet; If the path loss of confirming one or the more multiple mobile radio station that send dispatch request in step 960 base station 110 since on has not once measured and has changed in step 920, then in step 970 base station 110 to request scheduling permit said one or more the multiple mobile station issue be somebody's turn to do allowance.
At last, in step 980, base station 110 receives from the data of or more multiple mobile station transmission and turns back to monitoring step 900.By this way, being positioned at the Power Limitation user of cell edge maybe be only also be Power Limitation with most probable and is positioned at or conflicts near the user of cell edge.
What should add is except keeping watch on based on the channel of competing in step 900, and base station 110 is also from one or more mobile radio station reception data (not shown) that is not conflicting at the channel based on competition.
What can also add is; Said method embodiment is specially adapted to realize that through the computer program that is stored in the computer storage said memory promptly is that RAM (random access memory), ROM (read-only memory), EEPROM (EEPROM) or a certain other are applicable to the memory of storage computation machine program product.The computer program of realizing the method step of said method embodiment can be stored on the storage medium with being equal to, and for example CD-ROM, DVD, hard disk or any other are applicable to the medium of storage.
At last, should also be mentioned that the above embodiment of the present invention only for illustrative purposes and the present invention only limit the scope of the claim of enclosing.
Claims (17)
1. mobile radio station (200) that is used in cordless communication network (100) communication; Comprise at least one receiver and at least one reflector (210), be used for the monitor communications network activity first module (220), be used for detecting in Unit second (230) of the conflict of communication network and the Unit the 3rd (240) that is used for confirming representing the parameter of the channel quality on the radio channel
It is characterized in that it is not arranged for transmitting radio resource request when said mobile radio station (200) has data to send.
2. mobile radio station as claimed in claim 1 is characterized in that said radio resource request comprises dispatch request.
3. mobile radio station as claimed in claim 2 is characterized in that said dispatch request comprises the radio resource dispatch request of the following radio resource demand that is used to suppose.
4. like the described mobile radio station of one of claim 2-3, it is characterized in that said mobile radio station (200) further comprise transmission buffer (250) and wherein when the transmission buffer (250) of mobile radio station (200) when being sky said mobile radio station (200) be arranged for transmitting said dispatch request.
5. like the described mobile radio station of one of claim 1-3; It is characterized in that said mobile radio station (200) is arranged for; In case receiving scheduling of resource from said base station (300) permits; Whether if having data will to said base station (300) transmission and wherein said mobile radio station (200) further be arranged for receive said scheduling of resource allowance back said mobile radio station (200) do not have data will transmit, just to said base station (300) transmission new resources dispatch request if verifying it.
6. like the described mobile radio station of one of claim 1-3, it is characterized in that the said radio resource request that is transferred to said base station (300) comprises that indication mobile radio station (200) no longer includes the priority flag that data will be sent.
7. mobile radio station as claimed in claim 5 is characterized in that said new resources dispatch request comprises and is transferred to the different message format of resource request of said base station (300) together with data.
As aforementioned claim 1-3 in one of described mobile radio station, it is characterized in that said radio channel is based on the radio channel of competition.
As aforementioned claim 1-3 in one of described mobile radio station, it is characterized in that mobile radio station (200) is positioned at the edge of the overlay area of base station (300).
10. one kind is used for comprising at least one receiver and at least one reflector (310) in the base station (300) of cordless communication network (100) communication; The first module (320) that is used for monitoring wireless communication network (100) activity; The device of the parameter of the channel quality on the expression radio channel is confirmed in the Unit second (330) and being used for that is used for detecting the conflict of cordless communication network (100), it is characterized in that said base station (300) be applicable to from said cordless communication network (100) one or more multiple mobile station (200) receive data and force said one or more multiple mobile station (200) after the transfer of data of success with the predefined latency time period of any other data transfer delay.
11. base station as claimed in claim 10 is characterized in that said base station (300) is applicable to that other mobile radio stations (200) from said cordless communication network (100) receive data during the said predefined time cycle.
12., it is characterized in that said base station (300) is applicable in said cordless communication network (100) one or the information of multiple mobile station (200) transmission expression latency time period more like claim 10 or 11 described base stations.
13., it is characterized in that said base station (300) is applicable to the information that has directly successfully received each mobile radio station (200) transmission expression latency time period of data to it from it like claim 10 or 11 described base stations.
14. like claim 10 or 11 described base stations, it is characterized in that said base station (300) be applicable in cordless communication network (100) one or more the information of multiple mobile station (200) transmission expression latency time period together with ACK/NACK (confirming/unconfirmed) signaling.
15., it is characterized in that said base station (300) is applicable to the said information of transmission expression latency time period on control channel like claim 10 or 11 described base stations.
16., it is characterized in that said latency time period is deterministic parameter like claim 10 or 11 described base stations.
17., it is characterized in that said latency time period is a stochastic variable like claim 10 or 11 described base stations.
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| CN201210217754.3A CN102752869B (en) | 2006-11-17 | 2006-11-17 | For the movement station communicated within a wireless communication network and base station |
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| CN201210217754.3A CN102752869B (en) | 2006-11-17 | 2006-11-17 | For the movement station communicated within a wireless communication network and base station |
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| CN2006800563912A Division CN101558679B (en) | 2006-11-17 | 2006-11-17 | A mobile station communicating with a base station via a separate uplink when the parameters of channel quality fall below the predefined threholds |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109661035A (en) * | 2017-10-10 | 2019-04-19 | ***通信集团广东有限公司 | Business scheduling method and device |
| CN111885738A (en) * | 2014-12-18 | 2020-11-03 | 华为技术有限公司 | Method for acquiring site equipment request, access point equipment and site equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792066A (en) * | 2003-03-15 | 2006-06-21 | 北方电讯网络有限公司 | Communicating in a reverse wireless link information relating to buffer status and data rate of a mobile station |
| WO2006109851A1 (en) * | 2005-04-13 | 2006-10-19 | Ntt Docomo, Inc. | Mobile station, base station, mobile communication system, and communication control method |
-
2006
- 2006-11-17 CN CN201210217754.3A patent/CN102752869B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792066A (en) * | 2003-03-15 | 2006-06-21 | 北方电讯网络有限公司 | Communicating in a reverse wireless link information relating to buffer status and data rate of a mobile station |
| WO2006109851A1 (en) * | 2005-04-13 | 2006-10-19 | Ntt Docomo, Inc. | Mobile station, base station, mobile communication system, and communication control method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111885738A (en) * | 2014-12-18 | 2020-11-03 | 华为技术有限公司 | Method for acquiring site equipment request, access point equipment and site equipment |
| US11350435B2 (en) | 2014-12-18 | 2022-05-31 | Huawei Technologies Co., Ltd. | Method for obtaining request of station, access point, and station |
| CN111885738B (en) * | 2014-12-18 | 2022-09-02 | 华为技术有限公司 | Method for acquiring site equipment request, access point equipment and site equipment |
| CN109661035A (en) * | 2017-10-10 | 2019-04-19 | ***通信集团广东有限公司 | Business scheduling method and device |
| CN109661035B (en) * | 2017-10-10 | 2022-04-05 | ***通信集团广东有限公司 | Service scheduling method and device |
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