CN1219306A - Method and apparatus for allocating spectral resources in a wireless communication system - Google Patents
Method and apparatus for allocating spectral resources in a wireless communication system Download PDFInfo
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- CN1219306A CN1219306A CN98800167.5A CN98800167A CN1219306A CN 1219306 A CN1219306 A CN 1219306A CN 98800167 A CN98800167 A CN 98800167A CN 1219306 A CN1219306 A CN 1219306A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/12—Arrangements for reducing cross-talk between channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J4/00—Combined time-division and frequency-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The present invention encompasses a method and apparatus for efficiently communicating complex resource allocations from a central access point or base unit (14) to a mobile unit requesting service. The base unit (14) allocates these resources amongst several competing mobile units (10-12) performing a variety of applications. As such, it is often desirable to generate a complex schedule to achieve the optimum assignment providing the highest quality of service to mobile units (10-12). By communicating the complex schedule of uplink resources in one downlink transfer, the mobile unit (10) is free to transmit its data on the uplink without simultaneously receiving the downlink, reducing its complexity significantly.
Description
The present invention relates generally to communication system, relate in particular to a kind of method and apparatus that distributes frequency spectrum resource in the wireless communication system.
As everyone knows, communication system comprises a plurality of mobile units (for example 8 time slot half-duplex terminals) by radio-frequency channel and base station unit (or network) exchange message.A kind of communication system like this is the duplex radiophone communication system.In the duplex radiophone communication system, mobile unit is included in the transceiver of the roaming in certain the bounded geographic area that is called the sub-district, all communications are all provided by the single base station unit in the sub-district, and this base station unit comprises a transceiver that is connected to fixing wired facility.Most systems is divided into channel in couples with radio frequency, provides full-duplex communication with a kind of technology that is called Frequency Division Duplexing (FDD) (FFD).The transceiver of mobile unit uses a radio frequency to send the information that all send to base station unit, and uses another radio frequency (being called descending) to receive the information of all arrival.The responsibility of base station unit is to distribute these radio frequency resources to the mobile unit in its sub-district, and suitably handles all controversial ground requests.
Many mobile phone communication systems also adopt a kind of mobile unit multiplex technique that is called time division multiplexing (TDMA), and in this technology, the resource on specific radio channel is divided in time, and shares between active mobile unit.Generally speaking, resource is quantized into the fix information group (burst) of isometric (about 600 milliseconds).These information sets are divided into the form of the frame with a plurality of information sets (8) subsequently, and a series of information sets in the successive frame are called as a time slot.For circuit-switched application (for example speech), base station unit is traffic assignments wireless channel time slot on the uplink and downlink link usually simultaneously.The uplink and downlink frame generally staggers in time, thereby makes mobile unit not need the group of receiving and sending messages simultaneously, has greatly simplified wireless design.Mobile unit takies a time slot usually to a period of time (3 minutes), uses 72,000 independent information sets continuously.The resource allocation stage then takies the time period (1 second) of much shorter usually, and uses about 5 discontinuous information sets.
Convenient for signaling, the plurality of continuous information sets in the time slot can aggregate into other structures.For example, in the mobile panel of expert in Europe (GSM) Digital Cellular System, 4 continuous information groups in time slot can be divided into a piece, and piece is the quantifying unit that can use error correction coding.In addition, based on block boundary Resources allocation easily.
The block data communication agreement that has defined has covered these FDD/TDMA mobile phone communication systems.The resource allocation cycle of block data communication (250 information sets) is much smaller than traditional circuit-switched call, and always requires only one-way transmission on the upstream or downstream link of information sets.In addition, data recovery scheme requires the simple and direct transmission (being called affirmation) of a piece (4 information sets) to go up transmission at reverse link (sending if promptly be grouped on the down link, then is up link) usually, and which information sets that receives with indication goes wrong.Generally speaking, these groupings generate with random interval, and a plurality of mobile units can be asked service simultaneously, perhaps ask service when dividing into groups current transmission of other mobile units.Under specific environment, need seize the mobile unit of launching message actively, and give another mobile unit these resource allocations.For example, can determine the priority of mobile unit based on the service quality that requires (by turn-on time and data rate definition), thereby must seize the service that (preemption) could guarantee promise.
Traditional grouping system based on keeping is applied to aforementioned system usually, and it carries out the resource allocation of continuous information group set generally by specify start frame, end frame and particular time-slot in single resource allocation message.In fact, Nortel general packet radio service (GPRS) at GSM in Tdoc GPRS SMG2 99/96 has proposed this scheme.In a kind of like this system, all supplementary service amounts (for example descending affirmation) must send between upstream packet, and need wait until that upstream packet finishes.In overload system, descending affirmation seldom sends, and this makes usually the time that sends downlink grouped double or become three times that most of time wastes are waiting affirmation to be sent.
A kind of method comparatively flexibly of resource allocation is to keep certain part (being called User Status sign (USF)) of descending, to identify corresponding up state.This method is existing GSM GPRS standard, and GSM03.64 and version 1.1.0 are proposed.USF provides a large amount of flexibilities, make base station unit as required Resources allocation assign, and provide the space for having the affirmation of seizing option.But this scheme expends huge.It requires mobile unit constantly to monitor descending time slot.For only being operated in a mobile unit on the time slot, this is not too big burden, because the front was carried, frame staggers in time, the mobile unit group of needn't receiving and sending messages simultaneously.But if the some time slots of mobile unit request, then it may must be received and dispatched to be correctly decoded USF simultaneously.Such mobile unit must comprise duplexer filter, makes it to receive and dispatch simultaneously, thereby has increased its complexity greatly.
Therefore, need a kind of method and apparatus that the resource allocation of complexity is notified to these mobile units, and do not require that they receive and dispatch simultaneously.
Fig. 1 has illustrated a system;
Fig. 2 has illustrated the communication call stream between mobile unit and the base station;
Fig. 3 has illustrated typical tdma frame structure;
Fig. 4 has illustrated the typical offset between TDMA up link and the down link;
Fig. 5 has illustrated the up substantially resource map of half-duplex mobile unit;
Fig. 6 has illustrated that the ascending resource that enlivens the circuit user distributes;
Fig. 7 has illustrated the form of the representational resource allocation message relevant with Fig. 6 resource allocation;
Fig. 8 has illustrated when having circuit-switched user that the ascending resource of any active ues distributes;
Fig. 9 has illustrated the form of the representational resource allocation message relevant with Fig. 8 resource allocation;
Figure 10 has illustrated the form in order to the representational resource allocation message of seizing user's distribution shown in Figure 21;
After Figure 11 had illustrated that another user seizes by Figure 10 message, the ascending resource of any active ues distributed;
Figure 12 has illustrated the periodically ascending resource distribution in gap that comprises that enlivens the circuit user;
Figure 13 has illustrated the form of representational resource allocation message;
The flowchart text of Figure 14 mobile unit requested resource distribution method;
The flowchart text of Figure 15 the network method of reacting in response to the request of Figure 14;
The flowchart text of Figure 16 the network method of reacting in response to the request of Figure 14, it is that second terminal has kept the gap;
The flowchart text of Figure 17 another kind of mobile unit requested resource distribution method;
The flowchart text of Figure 18 the network method of reacting in response to the request of Figure 17, it has kept the gap for mobile unit inserts reverse link;
The flowchart text of Figure 19 another kind of mobile unit requested resource distribution method;
The flowchart text of Figure 20 the network method of reacting in response to the request of Figure 19, when current mobile unit need be redistributed, it sent a new assignment messages; And
Figure 21 has illustrated that the ascending resource of any active ues before seizing distributes.
Generally speaking, the present invention includes a kind of method and apparatus, in order to effectively the resource allocation of complexity is notified to the mobile unit that request is served from central access point or base station unit.Base station unit is responsible for these resource allocations are given the mobile unit of the competition of some execution different application.Therefore, often need to generate complicated scheduling and optimally distribute, provide the highest service quality to mobile unit with realization.If on mobile unit, add hardware to notify this distribution, then expend bigger.By the complexity scheduling of notice ascending resource in a downlink transfer, mobile unit can freely send its data on up link, and does not need receiving downlink simultaneously, thereby greatly reduces its complexity.This method unlike the prior art, prior art or require the mobile unit full duplex perhaps has allocative decision, its flexibility is not enough.
More particularly, a kind of method of distributing frequency spectrum resource in wireless communication system is disclosed.This method comprises the steps: to send the frequency spectrum resource request from terminal of wireless communication system, and receiving belt is useful on replying of the assignment messages of distributing frequency spectrum resource, and assignment messages comprises that bitmaps a plurality of discontinuous in the window distributes.In a preferred embodiment, frequency spectrum resource comprises radio frequency bandwidth, and wireless communication system is a digital communication system, and it comprises at least one cellular communication system, wireless local loop communication system, TDMA communication system and code division multiple address communication system.The frequency spectrum resource request comprises a packet channel request, and assignment messages comprises a grouping resources assignment messages.
Bitmap (bit map) distributes and comprises at least one gap, is used for second terminal and transmits, and at least one gap is used at least one link access channel, control information transmission and reverse link and confirms.At least one gap has also kept a part of frequency spectrum resource, is provided to the access of reverse link to terminal.The access of reverse link is used at least one affirmation, control information transmits and heavily assign (reassignment) message.
In a preferred embodiment, terminal is a half-duplex terminals or unidirectional terminal, and wireless communication system is an intercommunication system.Intrasystem terminal (mobile unit) comprises the device that is used for sending from the wireless system terminal frequency spectrum resource request, and receiving belt is useful on the device of replying of the assignment messages of distributing frequency spectrum resource, and assignment messages comprises that bitmaps a plurality of discontinuous in the window distributes.
The communication system of Resources allocation is also disclosed.This communication system comprises that a mobile unit (is used to send a message, this message comprises the information relevant with resource requirement with this mobile unit multislot capability) and base station unit (be used to receive the message that mobile unit sends, and send a message to mobile unit, this message comprises resource, time started information and the piece assignment bit map of distribution).In this embodiment, the resource quantity of distribution is to determine that according to the information relevant with resource requirement with this mobile unit multislot capability this information is sent to the base station by mobile unit.The message that mobile unit sends also comprises one " packet channel request " message, the message that base station unit sends to mobile unit also comprises " fixing grouping immediate assignment " message.Base station unit sends the channel and the mobile unit transmission of " fixing grouping immediate assignment " message " packet channel request " channel identical.
A kind of method that Resources allocation is given mobile unit in wireless communication system is also disclosed.Wireless communication system has predetermined frame structure, and it comprises the time slot of predetermined quantity in frame and the frame.This method comprises the steps: to receive the information from mobile unit, generate piece assignment information and time slot availability information (characterized the information how basis receives from mobile unit, in the predetermined frame structure, given mobile unit) and frame start information (characterize mobile unit and when should bring into use resource) with a plurality of resource block assignments.This method also comprises the steps: piece assignment information, time slot availability information and frame start information are sent to mobile unit, thereby mobile unit can use the resource of distribution.
Whether in this embodiment, mobile unit also comprises a half-duplex mobile unit with multislot capability, just used by other mobile units according to the time slot in the predetermined frame structure, and a plurality of Resource Block are distributed between the frame of predetermined frame structure changeably.According to needs gap periodically whether in the time slot in the predetermined frame structure, a plurality of Resource Block also are distributed between the frame of predetermined frame structure changeably.Periodicity gap in the time slot in the predetermined frame structure is with so that other mobile units can use resource or make the half-duplex mobile unit can receive message or measure.Piece assignment information, time slot availability information and frame start information have indicated receiver or the transmitter in the mobile unit how to use resource.Adopt the mobile unit of correlation method to comprise that transmitter is with emission and receive signal from base station unit, also comprise a decoder, in order to provide resource allocation to mobile unit according to the piece assignment information, time slot availability information and the frame start information that generate according to above-mentioned processing.
The another kind of method that Resources allocation is given mobile unit in wireless communication system is also disclosed.Wireless communication system has predetermined frame structure, and it comprises a plurality of time slots in frame and the frame.This method comprises the steps: according to the arrival of mailing to the information of mobile unit, determine that this mobile unit needs Resources allocation, generate piece assignment information and time slot availability information (characterized the information how basis receives from mobile unit, in the predetermined frame structure, given mobile unit) and frame start information (characterize mobile unit and when should bring into use resource) with a plurality of resource block assignments.This method also comprises the steps: piece assignment information, time slot availability information and frame start information are sent to mobile unit, thereby mobile unit can use the resource of distribution.In such an embodiment, this method is carried out in the network that comprises a base station unit, and the information that mails to mobile unit arrives network from external source.Equally, this mobile unit is a half-duplex mobile unit with multislot capability.
Described hereinly expanded the MAC layer, to be supported in a kind of new mobile unit type that Stuttgart introduces Tdoc SMG2 GPRS 183/97 first according to distribution method of the present invention.According to definition, this new mobile unit type is characterised in that low complex degree half-duplex RF layer, can send or receive all 8 time slots.It makes high-performance GPRS can become a kind of general service, thereby GSM is retained its competitive edge on global communications market.
Mention the feasible MAC scheme that has the USF position that can't use existing definition of the half-duplex attribute of new mobile unit type among the Tdoc SMG2 GPRS183/97.Existing USF scheme provides a kind of mode flexibly and effectively of distributing uplink bandwidth.But, monitor down link when he also requires mobile unit to launch on up link.New high-performance mobile unit type may only can be accomplished one of them aspect.
In order to support this mobile unit, defined one group of new message, in order to being distributed, detailed ascending resource is notified to mobile unit.Fixed allocation comprises start frame, time slot appointment (time slot bitmap) and piece appointment bitmap (characterizing the piece that each time slot is assigned).The mobile unit that receives this distribution can freely be launched on up link, and not need to monitor that down link is with search USF.It is single with relatively short grouping of information sets form emission that it makes half-duplex move, and providing high-quality business aspect the frame propagation delay time.In addition, can see that the degree of flexibility that this allocative decision provides is identical with USF position strategy, thereby support various mobile unit type simultaneously.
Ding Yi protocol type is intended to replenish existing protocol herein.The mobile unit type that can receive descending time slot during launching should directly be used the USF position.Except 8 new time slot half-duplex types, protocol extension does not change the MAC/RLC layer of mobile unit.These expansions are the interior scheduler of network of this new mobile unit type of influence support only.
Fig. 1 has illustrated a system.As shown in Figure 1, a plurality of mobile unit 10-12 communicate by letter with base station 14.Fig. 2 has described the exemplary call flow between mobile unit 10 and the base station unit 12.In " resource request " message 16, mobile unit 10 is informed its ability (being the multi-slot half-duplex) and resource requirement.For typical Internet protocol packets, resource size generally is 1500 bytes, and in the GPRS of standard encoding scheme, it can transmit in 66 pieces.Base station unit 14 must be determined the distribution of other mobile units 11-12 in the system after receiving this message 16, by " resource assignment " message 18, should distribute accurately to be notified to mobile unit 10 then.As previously mentioned, in half-duplex mobile unit 10, this distribution will cause problem.
In a preferred embodiment, the frame structure compatibility of mobile unit 10-12 and base station unit 14 and GSM Digital Cellular System shown in Figure 3.As everyone knows, frame 30 comprises 8 time slot 32-39 (as shown in Figure 3).Also show (as previously mentioned) among Fig. 3, piece 40 comprises 4 identical time slots in 4 successive frames, and piece 40 has been represented the quantifying unit that can use error correction coding.Piece 40 also provides a kind of resource allocation easily border.Well known in the art, the uplink and downlink transmission with mobile unit of full duplex ability generally is offset a variable, as shown in Figure 4.
The grouping of 8 time slot half-duplex mobile units 10 is started and is required scheduler to define a fixed allocation and notify this unit at the access phase of grouping transmission.Fixed allocation makes mobile unit 10 send piece and do not need to monitor simultaneously the USF position on down link.Consider many competitive use of up-descending affirmation, access request at random, Circuit Service amount or the like, and different mobile unit types, the available time slot of fixed allocation and piece must be revisable.In other words, distribution need comprise the gap solving at present single time slot mobile unit active in system, and be the affirmation retaining space of the packet traffic on reverse (up) direction.This part has defined a kind of effective ways that detailed resource allocation are notified to MS.
According to the present invention, two kinds of new message type are supported the fixed allocation scheme, " fixing grouping immediate assignment " message 52 and " fixedly grouping resources is assigned " message 56.These message will insert " grouping immediate assignment " message and " grouping resources appointment " message of asking in order to replace typical one or two stages shown in Figure 5.Initial " packet channel request " in the message 50, the half-duplex mobile unit, for example mobile unit 10 (similar every other mobile unit) is notified to network with its type and resource requirement.Receive after this request, network is identified as one 8 time slot half-duplex MS with this mobile unit 10, uses " fixing grouping immediate assignment " message to replace typical " grouping immediate assignment " message and responded then.Equally, in the access of two stages, network sends " fixedly grouping resources is assigned ", rather than typical " grouping resources appointment " message.Notice that network was responded with traditional " grouping immediate assignment " in the stage 1 of two stages access, 8 time slot half-duplex mobile units 10 are once with the simplest travelling carriage type operations.
The set of territory that fixed allocation message comprises almost with Tdoc SMG2 GPRS 174/97 in propose identical.But, according to the present invention, 24 USF values by generation with 88 " piece appointment bitmaps ", in order to specify the piece in the fixed allocation.And, add 11 frame numbers with first " start frame " in the specified bitmap.Those skilled in the art can understand, can be according to system's needs variation in order to the bit number of expression " piece appointment bitmap " and " start frame ".In conjunction with " time slot bitmap ", " start frame " and " piece appointment bitmap " defined primary distribution uniquely." piece appointment bitmap " represented a window, and piece distributes on this window." start frame " defined the beginning of window, and the distributed time slot number has then defined the size of window.On the time slot of any amount, can distribute 88 pieces altogether." piece appointment bitmap " can be imagined as a block array.If distributed 8 time slots, bitmap has been represented 8 in 11 block arrays.The piece of distributing to each time slot is by representing every 8 bits.Similarly, if distributed 4 time slots, bitmap has been represented 4 in 22 block arrays, represents a piece every 4 bits in the same time slot.
Fig. 6 has described according to the present invention, and a kind of possible ascending resource in having the light load system of any active ues distributes.Among Fig. 6, each tabulation shows that the piece on the particular time-slot distributes, each line display a new frame, the top-down increase of its time.The piece that is labeled as " open " does not show assigns.Resource request message has been assigned in the fast expression that is masked as Packet Random Access Channel (PRACH).The piece that is labeled as " a " is assigned to user a.
Referring to Fig. 6, described during one and the half point group multi-frame that the ascending resource known to the scheduler distributes in the network.As mentioned above, each row figure has illustrated the appointment of new frame or its combination, and each row has illustrated the behavior of each time slot.The content representation of each unit the resource assignment that need inform.In Fig. 6, all time slots are assigned to be Packet Data Channel (PDCH), and 0 time slot is as main Packet Data Channel (MPDCH), and each multi-frame comprises 4 PRACH, and one 8 time slot half-duplex mobile unit 10 is scheduled, and is marked with mobile unit a.Network is 1017 to inform this distribution by specify start frame in " start frame " part of " fixing grouping immediate assignment " message 52.Fig. 7 has usually described according to representational " fixing grouping immediate assignment " of the present invention message 52.As shown in Figure 7, " time slot bitmap " (being marked with " time slot appointment " in Fig. 7) is configured to " 1s " entirely, represent that all time slots all enliven, the suitable bit in " piece appointment bitmap " part of message 52 is configured to " 1 ", represents the piece that all have distributed.In this embodiment, Fig. 7 has represented the bit appointment, and Fig. 6 has represented the explanation that bit is assigned in the GSM frame structure.
For the flexibility of assignment messages is described, consider a comparatively complicated example.Fig. 8 shows the ascending resource that has any active ues during and the half point group multi-frame once more.In this embodiment, only distributed 6 time slots to give PDCH; Time slot 4 and 5 is used by circuit-switched user." the time slot bitmap " of " fixing grouping immediate assignment " message 52 partly (Fig. 9) provides and only distributed the indication of 6 particular time-slots to this mobile unit, be " 11110011 " in this case, show that time slot 4 and 5 do not distribute to half-duplex mobile unit (for example mobile unit 10).Network is 1017 start frame to be notified to mobile unit 10 by specify start frame in " start frame " part of " fixing grouping immediate assignment " message 52 still.The front face is the same, and 0 time slot is MPDCH, and mobile unit a is one 8 a time slot half-duplex mobile unit (for example mobile unit 10).In addition, two single time slot mobile units are using this system, mobile unit 11 and 12 (being marked with b and c in Fig. 8).At last, another mobile unit (being marked with d) confirms have grouping to send on the down link.Fig. 9 has illustrated that in this case network comprises " piece appointment bitmap " part of message 52 by the form of base station unit 14 to representational " fixing grouping immediate assignment " message 52 of mobile unit a transmission.As shown in Figure 9,6 of use row have been represented the distribution of 6 PDCH time slots.Notice at the beginning of time slot 2 and 7 and comprised that a plurality of gaps are to hold mobile unit b and c.Equally, the gap in the time slot 3 has held the affirmation that the mobile unit (not shown in Figure 1) that is marked with d is sent.As can be seen, the fixed block distribution technique is very flexible from this example, for a plurality of mobile units provide the access of channel, and the relevant issues of connectivity problem and existing art can not occur.
Packet delivery to mobile unit
Grouping is consigned to 8 time slot half-duplex mobile units 10 dual mode can be arranged.Can imagine that by existing this mobile unit type of the incompatible support of message set, the processing that this massage set is carried out is very similar to 8 time slot full duplex mobile units.Alternatively, network can make mobile unit can not carry out other behaviors when receiving with the fixedly scheduling of downlink grouped of mode that is similar to upstream packet.
Network can consign to downstream message 8 time slot half-duplex mobile units 10, and its mode is identical to 8 time slot full duplex mobile units with it, as long as it notes sending piece on down link not when knowing that mobile unit 10 is just sending on up link.Tdoc SMG2 GPRS 174/97 has defined " the RLC-grouping resources of down link an is assigned " message, comprises TFI, distributed time slot and channel allocation.8 time slot half-duplex mobile units 10 can monitor down link and retrieve to have descending that specifies TFI.In addition, can use the USF position with sign piece wherein in this case, thereby on up link, send ACK.Certainly, it will no longer can receive descending when sending ACK.Therefore, when mobile unit sent, network need be postponed descending transmission.In addition, because mobile unit 10 can not read second group of USF position, so each time slot can not be assigned more than continuous blocks.Consider all these, can imagine that 8 time slot half-duplex mobile units 10 can use traditional massage set, as long as network and MS observe following rule:
1. network never uses USF position scheme, and each time slot allocation that is 8 time slot half-duplex MS is more than one continuous up.
2. network never sends descending that comprises the information that mails to 8 time slot half-duplex MS, and up of distributing of it and same MS is overlapping.These limited descending comprise a piece that comprises user data, and the piece that comprises the USF position of this MS.Because descending/and uplink frame skew and up and descending relative phase, up of distribution can stop some descending transmissions (depending on time slot).
3. whenever the 8 time slot half-duplex MS USF that its assigns that decodes on down link, it must accurately send a piece in up link in distributed time slot.
Follow described hereinly according to distribution method of the present invention, these system requirements can not be difficult.As possibility, the fixed resource assignment messages can define on down link, accurately specifies which descending to comprise the data that mail to 8 time slot half-duplex mobile units 10.This fixed resource assignment messages also comprises the distribution of relevant up affirmation.According to descending that is sent quantity, need one or two affirmation.Relevant descending coding can be passed on by " start frame ", " time slot bitmap " and " piece notice bitmap ".These three territories are similar with regard to their above-mentioned ascender, and still which the descending needs in " piece notice bitmap " meeting specified window mail to 8 time slot half-duplex mobile units 10." start frame " sets up first frame in " piece notice bitmap ", and " time slot bitmap " defined the size (be in the frame which time slot do distribution like this) of window.In addition, the affirmation piece of each distribution can be passed on by specifying 5 bits " acknowledgement frame skew " and 3 bit time slots on the up link." acknowledgement frame skew " combination " start frame " can add up with definite piece wherein, thereby confirms downlink grouped.A kind of scheme in back has been imitated the uplink assignment method, can facilitate to mobile unit 10.
The connotation of current MAC/RLC layer
Other mobile units in the system do not need to revise agreement.Other any mobile unit types all continue to adopt the agreement based on the USF position of present definition.Network must keep a USF sign indicating number from the individual USF sign indicating number in 8 (or 7), be 8 time slot half-duplex mobile unit mark uplink link status with it during fixed allocation.The quantity of the 8 time slot half-duplex mobile units of no matter dispatching how much, only needs to keep a USF, because these mobile units only depend on the fixed resource assignment messages.Similarly, the mobile unit of other types need not distinguished between one 8 time slot half-duplex mobile unit or another 8 time slot half-duplex mobile unit.
System problem (for example service quality, power control, timing increase and measurement report) will be discussed in independent document.
Seize and assign again
GPRS and many other systems all wish to provide to its user the assurance of quality of service (Qos).The data rate of Qos so that certain is obtained agreeing, the form of the average packet propagation delay time that the user experienced is measured.In order to realize that Qos guarantees that GPRS has assigned different priority for the user, the user must send these priority when each access attempts.Then, network must be discerned this priority, and dispatched users suitably.If when the request of high priority mobile unit was served, the low priority mobile unit sent, then the high priority mobile unit should have precedence over the low priority mobile unit.The described fixed allocation of this document can stop the suitable scheduling of high priority mobile unit, because the half-duplex mobile unit can not be monitored when sending.If network carries out the continuous dispensing scheduling for the low priority mobile unit, then mobile unit can't receive heavy assignment messages, therefore can't be seized.Figure 21,10 and 11 has illustrated the possible solution of this problem.
The ascending resource that has any active ues before Figure 21 has illustrated and seized distributes.Tactful gap in the uplink assignment (Strategic gap) makes network heavy assignment messages can be notified to mobile unit where necessary.During the gap, the low priority mobile unit (is marked with mobile unit and a) carries out discontinuous transmission, and monitor down link.If heavy assignment messages arrives, then continue its existing appointment and the recovery emission, until next gap.But if network has been launched heavy assignment messages, then the low priority mobile unit carries out discontinuous transmission in new assignment period.At this moment, high priority mobile unit (being marked with mobile unit b) supposition its grouping of emission on up link.Figure 10 has illustrated the coding that distributes among Figure 21, and this coding will be received by low priority mobile unit a.Figure 11 shows according to the present invention, and low priority mobile unit a is distributed by the result after seizing among Figure 21.
The periodicity gap
Scheduler in the network is also not exclusively known downlink traffic usually.Accurately the gap in the dispatching downlink assignment messages is difficult with other mobile units in the containment.Therefore, preferably the periodicity gap is inserted the distribution of mobile unit, be used for definite downlink traffic in the future.Figure 12 has illustrated and has comprised that periodically the ascending resource that enlivens the circuit user that has in gap distributes, and Figure 13 has illustrated the form of representational resource allocation message, and this message is distributed in order to generate ascending resource shown in Figure 12.As shown in figure 12, network has been dispatched gap of almost every frame in the time slot that changes, and makes and can pass on interim descending affirmation as required on up link.In addition, the time slot of variation provides great benefit to other mobile unit types of using system.For example, single time slot mobile unit (only being operated in the mobile unit of a tdma slot) only needed to wait at most 8 pieces before the descending affirmation that sends the end of packet transmission.Similarly, the multi-slot mobile unit can send descending affirmation immediately, because all there is the gap in all frames.The network in property dispatching cycle gap has finally reduced system's time delay, provides higher service quality to all mobile units.
Figure 14 general description have mobile unit 10 requested resource distribution methods of half-duplex multislot capability.Processing starts from step 1400, proceeds to step 1402, groupings to be sent such as mobile unit 10.Then in step 1404, mobile unit 10 by " packet channel request " message 50 sends a request for allocation on access channel.In step 1406, mobile unit 10 receives an assignment messages with the form of " fixing grouping immediate assignment " message 52 on down link.Then, mobile unit 10 is equipped with the launch time that obtains it in step 406 based on this branch of content interpret of message 52, handles and proceeds to step 1410, and mobile unit 10 is once tested, and determines whether to have distributed piece for transmission.If test result is sure, flow process proceeds to step 1412, and mobile unit sends a segment information in piece.If but test result negates in the frame 1410, then skips steps 1412, and flow process proceeds to step 1414, test to determine whether the having finished distribution window.If the test result in the step 1414 is sure, flow process proceeds to step 1402 and repeats this processing.If but test result negates in the step 1414, then collect next segment information that needs emission in step 1416, flow process proceeds to step 1410, repeats test.
The flow chart of Figure 15 is understood the method that base station unit 14 is reacted in response to request shown in Figure 14 in the network in general.Start from step 1500, flow process proceeds to step 1502, and network is waited for the request for allocation of mobile unit 10.In step 1504, network is that mobile unit 10 determines to distribute window, handles and proceeds to step 1506, tests to determine whether needing piece to be used for the business information of other types.If the test of step 1506 is sure, flow process proceeds to step 1508, and network inserts the gap to divide and is equipped with the business information of holding other types.If but the test of step 1506 negate, then skips steps 1508, flow process proceeds to step 1510, network sends allocation schedule to mobile unit.When step 1510 finished, flow process proceeded to step 1502, repeated entire process shown in Figure 15.
The flow chart of Figure 16 is understood the method that network is reacted in response to request shown in Figure 14 in general, and it is that Unit second has kept the gap.Processing starts from step 1600, proceeds to step 1602, and network is waited for the request for allocation of mobile unit 10.When receiving request, network be that mobile unit 10 determines to distribute windows in step 1604, handles and proceeds to step 1606, tests to have determined whether that second terminal wishes to launch.If the test of step 1606 is sure, flow process proceeds to step 1608, and network inserts the gap to divide to be equipped with and allows another (second) terminal to insert specific communication channel.If the test of step 1606 negates, then skips steps 1608, and flow process proceeds to step 1610, and network sends allocation schedule to mobile unit 10.After step 1610, flow process proceeds to step 1502, repeats entire process.
The flow chart of Figure 17 is understood mobile unit 10 requested resource distribution methods in general.Referring to Figure 17, processing starts from step 1700, proceeds to step 1702, and the grouping of mobile unit outstanding message sends to the base station unit 14 in the network.In step 1704, mobile unit 10 by " packet channel request " message 50 sends a request for allocation on access channel.In step 1706, mobile unit 10 receives an assignment messages (for example " fixing grouping immediate assignment " message 52) on down link.In step 1708, mobile unit 10 explains that this branch is equipped with the particular transmission time that obtains it.In step 1710, mobile unit 10 is once tested then, determines whether to have distributed piece for transmission.If the test result of step 1710 is sure, flow process proceeds to step 1712, sends a segment information in the piece that distributes.If the test result of step 1710 negates that then in step 1714, mobile unit 10 receives a message from base station unit 14 on down link.After the step 1712 and 1714 is step 1716, tests to determine whether the having finished distribution window.If the test result in the step 1716 is sure, flow process proceeds to step 1702 and repeats entire process.If but test result negates in the step 1716, then flow process proceeds to step 1718, collects next segment information that needs emission.After the step 1718, flow process proceeds to step 1710, repeats the latter half of flow process shown in Figure 17.
The flow chart of Figure 18 is understood in general according to the present invention, the method that network is reacted in response to the request of Figure 17, and it has kept the gap for mobile unit inserts reverse link.As shown in figure 18, processing starts from step 1800, proceeds to step 1802, and network is waited for the request for allocation of mobile unit 10.Flow process proceeds to step 1804, and network is that mobile unit 10 determines to distribute window.In step 1806, the reverse link of testing to determine whether to need piece to be used for mobile unit 10 inserts.If the test of step 1806 is sure, network inserts the gap to divide to be equipped with and allows the mobile unit 10 interim reverse links that insert.If but the test of step 1806 negate, then skips steps 1808, flow process proceeds to step 1810, network sends allocation schedule to mobile unit 10.After step 1810, flow process proceeds to step 1802, repeats whole flow process shown in Figure 180.
The flow chart of Figure 19 is understood mobile unit 110 requested resource distribution methods in general.Referring to Figure 19, processing starts from step 1900, proceeds to step 1902, and the grouping of mobile unit outstanding message sends to the base station unit 14 in the network.In step 1904, mobile unit 10 by " packet channel request " message 50 sends a request for allocation on access channel.In step 1906, mobile unit 10 receives an assignment messages (for example " fixing grouping immediate assignment " message 52) on down link.In step 1908, mobile unit 10 explains that this branch is equipped with the particular transmission time that obtains it.In step 1910, mobile unit 10 is once tested then, determines whether to have distributed piece for transmission.If the test result of step 1910 is sure, flow process proceeds to step 1912, sends a segment information in the piece that distributes.If the test result of step 1910 negates that then in step 1914, mobile unit 10 receives a message from base station unit 14 on down link, and tests to determine whether the having received message of heavily assigning distribution in step 1916.If the test result in the step 1916 is sure, flow process proceeds to step 1908, and mobile unit 10 explains that once more this branch is equipped with the particular transmission time that obtains it.If test result negates in the step 1916, test to determine whether the having finished distribution window in step 1918.If the test result of step 1918 is sure, flow process proceeds to step 1902, and repeats entire process.If but test result negates in the step 1918, then flow process proceeds to step 1920, collects next segment information that needs emission.After the step 1920, flow process proceeds to the test of step 1910, repeats the latter half of flow process shown in Figure 19.
The flow chart of Figure 20 is understood in general according to the present invention, the method that network is reacted in response to the request of Figure 19, and when current mobile unit 10 need be redistributed, it sent a new assignment messages.As shown in figure 20, this method starts from step 2000, proceeds to step 2002, and network is waited for the request for allocation of mobile unit.In step 2004, network is that mobile unit 10 determines to distribute windows, handles and proceeds to step 2014, tests whether to have seized certain with this distributions really and have distribution.If the test of step 2014 is sure, flow process proceeds to step 2006, and network is determined new the distribution for other mobile units, then in step 2008, with the gap insert new divide to be equipped with hold the higher priority business.Then, in step 2010, network inserts the gap newly to divide to be equipped with and allows other mobile units to insert reverse link temporarily, and in step 2012, network sends new allocation schedule to other mobile units.After step 2012, and if the test of step 2014 negate, then flow process proceeds to step 2016, network with the gap insert new divide to be equipped with hold existing traffic carrying capacity.In step 2018, network inserts the gap to divide to be equipped with and allows mobile unit to insert reverse link temporarily, and in step 2020, network sends allocation schedule to mobile unit, and proceeds to step 2002, repeats the whole flow process of Figure 20.
Although specifically illustrate and described the present invention in conjunction with specific embodiment, those skilled in the art can understand, and under prerequisite without departing from the spirit and scope of the present invention, can carry out different variations in form and details.The corresponding construction of all devices or step, material, behavior and equivalent and function element are intended to comprise arbitrary structure, material or the behavior of finishing these functions in following claims, and other statement elements that propose claim especially.
Claims (36)
1. method of in wireless communication system, distributing frequency spectrum resource, the method comprising the steps of:
Launch described frequency spectrum resource request from described terminal of wireless communication system; And
Reception has replying of the assignment messages of distributing described frequency spectrum resource, and described assignment messages comprises that bitmaps a plurality of discontinuous in the window distributes.
2. according to the process of claim 1 wherein that described frequency spectrum resource comprises radio frequency bandwidth.
3. according to the process of claim 1 wherein that described wireless communication system is a digital communication system.
4. according to the method for claim 3, wherein said digital communication system comprises at least one in cellular communication system, home loop communication system, TDMA communication system and the code division multiple address communication system.
5. according to the process of claim 1 wherein that the described request of described frequency spectrum resource comprises a packet channel request.
6. according to the process of claim 1 wherein that described assignment messages comprises a grouping resources assignment messages.
7. comprise at least one gap according to the process of claim 1 wherein that described bitmap distributes, be used for second terminal and transmit.
8. according to the method for claim 7, wherein said at least one gap is used at least one that link access channel, control information transmission and reverse link are confirmed.
9. according to the process of claim 1 wherein that described at least one gap has also kept a part of described frequency spectrum resource, to be provided to the access of reverse link to described terminal.
10. according to the method for claim 9, the access of wherein said reverse link is used for confirming, control information transmits and at least one of heavy assignment messages.
11. according to the process of claim 1 wherein that described terminal is a half-duplex terminals.
12. according to the process of claim 1 wherein described terminal be a unidirectional terminal,
13. according to the process of claim 1 wherein that described wireless communication system is an intercommunication system.
14. a device that distributes frequency spectrum resource in wireless communication system, this device comprises:
Be used for sending the device of described frequency spectrum resource request from described wireless system terminal; And
Reception has the device of replying of the assignment messages of distributing described frequency spectrum resource, and described assignment messages comprises that bitmaps a plurality of discontinuous in the window distributes.
15. the communication system of a Resources allocation, this communication system comprises:
Mobile unit is used to send the message of the relevant information that comprises this mobile unit multislot capability and resource requirement; And
Base station unit is used to receive the message that mobile unit sends, and sends a message to mobile unit, and this message comprises resource, time started information and the piece assignment bit map of distribution.
16. according to the communication system of claim 15, wherein the resource quantity of Fen Peiing determines that according to the relevant information of this mobile unit multislot capability and resource requirement this information is sent to the base station by mobile unit.
17. according to the communication system of claim 15, wherein the message of mobile unit transmission also comprises one " packet channel request " message.
18. according to the communication system of claim 17, wherein base station unit also comprises " fixing grouping immediate assignment " message to the message of mobile unit transmission.
19. according to the communication system of claim 18, the channel of wherein base station unit transmission " fixing grouping immediate assignment " message is identical with the channel that mobile unit sends " packet channel request ".
20. Resources allocation is given a kind of method of mobile unit in wireless communication system, this wireless communication system has predetermined frame structure, and frame structure comprises a plurality of time slots in frame and the frame, and this method comprises the steps:
Reception is from the information of mobile unit;
Generate piece assignment information, time slot availability information and frame start information, wherein piece assignment information and time slot availability information have characterized the information how basis receives from mobile unit, in the predetermined frame structure, give mobile unit, and when frame start information sign mobile unit should bring into use resource with a plurality of resource block assignments; And
Piece assignment information, time slot availability information and frame start information are sent to mobile unit, thereby mobile unit can use the resource of distribution.
21. according to the method for claim 20, wherein mobile unit also comprises a half-duplex mobile unit with multislot capability.
22. whether according to the method for claim 20, wherein just used by other mobile units according to the time slot in the predetermined frame structure, a plurality of Resource Block are distributed between the frame of predetermined frame structure changeably.
23. according to the method for claim 20, wherein according to needs cycle whether in the time slot in the predetermined frame structure. the property gap, a plurality of Resource Block are distributed between the frame of predetermined frame structure changeably.
24. according to the method for claim 23, wherein the periodicity gap in the time slot in the predetermined frame structure is with so that other mobile units can use resource or make the half-duplex mobile unit can receive message or measure.
25. according to the method for claim 20, wherein piece assignment information, time slot availability information and frame start information have indicated receiver or transmitter in the mobile unit how to use resource.
26. mobile unit that is used for wireless communication system, this mobile unit comprises that transmitter is to transmit and receive the signal from base station unit, this mobile unit also comprises a decoder, in order to provide resource allocation according to the piece assignment information, time slot availability information and the frame start information that generate according to claim 20 to mobile unit.
27. Resources allocation is given a kind of method of mobile unit in wireless communication system, this wireless communication system has predetermined frame structure, and this frame structure comprises a plurality of time slots in frame and the frame, and this method comprises the steps:
According to the arrival of the information that mails to mobile unit, determine that this mobile unit needs Resources allocation;
Generate piece assignment information, time slot availability information and frame start information, wherein piece assignment information and time slot availability information have characterized the information how basis receives from mobile unit, in the predetermined frame structure, give mobile unit, and when frame start information sign mobile unit should bring into use resource with a plurality of resource block assignments; And
Piece assignment information, time slot availability information and frame start information are sent to mobile unit, thereby mobile unit can use the resource of distribution.
28. according to the method for claim 27, wherein this method is carried out in the network that comprises a base station unit.
29., wherein mail to the resource of the information of mobile unit from network-external according to the method for claim 28.
30. according to the method for claim 27, wherein mobile unit also comprises a half-duplex mobile unit with multislot capability.
31. whether according to the method for claim 27, wherein just used by other mobile units according to the time slot in the predetermined frame structure, a plurality of Resource Block are distributed between the frame of predetermined frame structure changeably.
32. according to the method for claim 27, wherein according to needs gap periodically whether in the time slot in the predetermined frame structure, a plurality of Resource Block are distributed between the frame of predetermined frame structure changeably.
33. according to the method for claim 32, wherein the periodicity gap in the time slot in the predetermined frame structure is with so that other mobile units can use resource or make the half-duplex mobile unit can receive message or measure.
34. according to the method for claim 27, wherein piece assignment information, time slot availability information and frame start information have indicated the receiver in the mobile unit how to use resource.
35. mobile unit that is used for wireless communication system, this mobile unit comprises that transmitter is to transmit and receive the signal from base station unit, this mobile unit also comprises a decoder, in order to provide resource allocation according to the piece assignment information, time slot availability information and the frame start information that generate according to claim 27 to mobile unit.
36. Resources allocation is given a kind of method of mobile unit in wireless communication system, this wireless communication system has predetermined frame structure, and this frame structure comprises a plurality of time slots in frame and the frame, and this method comprises the steps:
According to the information that receives from mobile unit, determine that this mobile unit needs Resources allocation;
Generate piece assignment information, time slot availability information and frame start information, wherein piece assignment information and time slot availability information have characterized the information how basis receives from mobile unit, in the predetermined frame structure, give mobile unit, and when frame start information sign mobile unit should bring into use resource with a plurality of resource block assignments; And
Piece assignment information, time slot availability information and frame start information are sent to mobile unit, thereby mobile unit can use the resource of distribution.
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| CN98800167.5A Pending CN1219306A (en) | 1997-02-21 | 1998-02-20 | Method and apparatus for allocating spectral resources in a wireless communication system |
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| JP (1) | JP2000511750A (en) |
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| US20120020338A1 (en) * | 2010-07-22 | 2012-01-26 | David Philip Hole | Methods and apparatus to allocate resources and detect allocated resources in wireless communications |
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- 1998-02-20 WO PCT/US1998/003259 patent/WO1998037706A2/en not_active Application Discontinuation
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- 1998-02-20 JP JP10536880A patent/JP2000511750A/en not_active Ceased
- 1998-02-20 CN CN98800167.5A patent/CN1219306A/en active Pending
- 1998-02-20 AU AU61772/98A patent/AU6177298A/en not_active Abandoned
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Also Published As
| Publication number | Publication date |
|---|---|
| WO1998037706A2 (en) | 1998-08-27 |
| EP0925693A4 (en) | 2002-01-02 |
| JP2000511750A (en) | 2000-09-05 |
| WO1998037706A3 (en) | 1998-11-26 |
| EP0925693A2 (en) | 1999-06-30 |
| AU6177298A (en) | 1998-09-09 |
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