CN101483446B - Method and apparatus for dynamically controlling uncontinuous receiving - Google Patents
Method and apparatus for dynamically controlling uncontinuous receiving Download PDFInfo
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- CN101483446B CN101483446B CN200810002865.6A CN200810002865A CN101483446B CN 101483446 B CN101483446 B CN 101483446B CN 200810002865 A CN200810002865 A CN 200810002865A CN 101483446 B CN101483446 B CN 101483446B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The present invention discloses a method for dynamically controlling the non-continuous receiving of user facility with a self-adapting mode. The invention comprises the following steps: allocating resource for the schedulable user facility at the network side in scheduling period, and confirming whether the data to be transmitted to each schedulable user facility exists after present scheduling period; indicating a token indicating whether the data to be transmitted to the user facility exists for the user facility according to the confirmation result, and transmitting the set token and scheduling information together to the user facility; and controlling the receiver to enter into a dormancy stage or continue in the activation period by the user facility according to the received token, wherein when the token shows that the data to be transmitted to the user facility exist at the network side, the user facility controls the receiver in the activation period. When the token shows that data to be transmitted to the user facility do not exist, the user facility controls the receiver to enter the dormancy stage.
Description
Technical field
The present invention relates to dynamically control the method and apparatus of discontinuous reception, particularly, relate to by whether predicting in next dispatching cycle to subscriber equipment (UE, User Equipment) send data, and in down dispatch information, add flag bit and will predict the outcome and inform subscriber equipment, and then control the method and apparatus of the on off state of subscriber equipment receiver.
Background technology
Along with the development of communication to mobility, broadband direction, the power saving of mobile terminal is subject to extensive concern.A lot of communication standardizations have all added the consideration to power saving while being organized in formulation relevant criterion.Especially, the access network of future mobile communication system all will carry out transfer of data based on IP technology, and the burst characteristic of IP packet and the transmission channel sharing characteristic between user makes to arrive the data of subscriber equipment, be discrete, the energy consumption of therefore, how to save subscriber equipment seems more important.
In fact, in existing mobile communication system, considered power saving.For example, gsm system has the power saving scheme that is called as " discontinuous reception " (Discontinuous Receive, DRX).Specifically, in gsm system, travelling carriage, always in sleep state, is just waken up once every several " multiframes " (being about as much as the time period of 1/8th seconds).System can indicate per second the waking up of travelling carriage to check whether there is incoming call for 4 times, or approximately per second waking up checks whether there is incoming call for 1 time.In DRX operation, processor will cut out receiver and make oneself to enter the sleep pattern of low-power consumption.By timer internal, through after the suitable length of one's sleep, restarting processor.
At present, in mobile communication system, typical power-saving mechanism comprises the DRX mechanism in cellular network, for example, referring to 3GPP, " 3rd Generation Partnership Project; TechnicalSpecification Group Radio Access Network; RRC ProtocolSpecification for Release 1999; " Technical Specification 3G TS25.331, version 3.5.0, the 3 kinds of power saving class (Power Saving Class) in the up-to-date WMAN standard 802.16e of 2000 (lists of references 1) and IEEE.
In addition, under DRX mechanism in 3G UMTS (3G universal mobile telecommunications system), subscriber equipment receiver have 3 kinds of active states (referring to S.-R.Yang, S.-Y.Yan and H.-N.Hung, " Modeling UMTS with Bursty Packet Data Traffic ", IEEE Trans.MobileComputing., vol.6, no.12, pp.1398-1409, Dec.2007, list of references 2):
1. active period: in active period, subscriber equipment is opened receiver and received the packet being transmitted by network side.
2. deexcitation phase: while not having to mail to the data of subscriber equipment in network side buffer, subscriber equipment is opened a deexcitation timer, enters the deexcitation phase.If there are data to arrive data buffer corresponding to network side before timer expired, timer stops, and finishes the deexcitation phase, starts next active period; If do not have all the time packet to arrive data buffer corresponding to network side before timer expired, finish the deexcitation phase, subscriber equipment cuts out receiver, starts to enter rest period.
3. rest period: subscriber equipment enters DRX pattern within rest period.Rest period comprises at least one DRX circulation.In the ending of each DRX circulation, subscriber equipment can be opened receiver monitoring seek channel.Whether beep-page message is used to indicate in previous DRX circulation has packet to arrive data buffer corresponding to network side.If had, stop rest period, and subscriber equipment starts to receive packet from network side; If do not have packet to arrive data buffer corresponding to network side, subscriber equipment enters next DRX circulation, continues rest period.
Active period and deexcitation phase belong to power enable mode, and under this pattern, subscriber equipment receiver is in open mode, and network side can send packet to subscriber equipment.Rest period belongs to power saving mode, and under this pattern, subscriber equipment receiver is in closed condition, and network side does not send packet to subscriber equipment.
In being in the 3GPP LTE of normalization period, network side is each user device configuration DRX loop parameter.A DRX circulation was comprised of active period and rest period.Active period comprises again to be opened duration and deexcitation phase.For example,, referring to 3GPP TS 36.300 V8.2.0 EvolvedUniversal Terrestrial Radio Access (E-UTRA) and Evolved UniversalTerrestrial Radio Access Network (E-UTRAN) Overall description Stage 2Release 8.In this case, subscriber equipment receiver has following 4 kinds of active states:
1. open the duration: subscriber equipment is waken up to enter from rest period and opened the duration.Opening in the duration, subscriber equipment receives the information of grouping Dedicated Control Channel (PDCCH).On PDCCH channel, there is signaling information networking side direction notification of user equipment, relevant with subscriber equipment, as the control message about resource distribution such as confirmation, power control, resource distribution and reallocation.If subscriber equipment can successfully be decoded to the information of PDCCH signal, open deexcitation timer, enter the deexcitation phase; Otherwise subscriber equipment enters rest period after the unlatching duration finishes.
2. deexcitation phase: when subscriber equipment is successfully decoded after PDCCH channel, subscriber equipment is opened deexcitation timer, enters the deexcitation phase.In the deexcitation phase, subscriber equipment continues to monitor PDCCH and associated control channel.If subscriber equipment, before deexcitation timer expired, successfully, to PDCCH and associated control channel decoding, reopens deexcitation timer, again enter the deexcitation phase; Otherwise subscriber equipment enters rest period by the deexcitation phase after deexcitation timer expired.
3. active period: the time (comprise open duration and deexcitation phase) of subscriber equipment receiver in opening all belongs to active period.
4. rest period: subscriber equipment receiver within rest period in closed condition.
In addition, IEEE has introduced the concept of mobile broadband wireless access (Mobile BWA) in up-to-date WMAN standard 802.16e.Travelling carriage (MS, Mobile Station) can move in service process.Introduce mobility and improved the requirement to MS energy saving.Therefore, 3 kinds of power saving class in 802.16e, have also been increased.For example, referring to: IEEE 802.16e, Part 16:Air Interfacefor Fixed and Mobile Broadband Wireless Access Systems-Amendmentfor Phys ical and Medium Access Control Layers for Combined Fixedand Mobile Operation in Licensed Bands, Nov.2004.
In standard, stipulate that each MS has activation and two kinds of mode of operations of dormancy.Under park mode, MS carries out the dormancy period consulting with base station BS, in these cycles, between MS and serving BS broadcasts, there is no data interaction, MS can close relevant physical equipment, thereby has reached the object that reduces MS power consumption and save BS air interface resource.At MS, during in resting state, BS can cushion the service data unit (SDU) that sends to MS.When each enable mode finishes, between MS and BS, carry out sleep messages negotiation with initialization park mode.At the two, confirm after sleep messages, normal transfer of data stops at the time point of consulting, and enable mode finishes, and MS enters park mode, with certain interval dormancy, then wakes up and is confirmed whether to receive data.This interim wake-up states is called listening intervals.In listening intervals, MS monitors the message of indicating about business in BS broadcast message.If have data need to mail to MS in this message indication BS, MS enters enable mode; Otherwise MS keeps park mode, starts next sleep interval.In park mode, each service connection can be according to the associated suitable power saving class of own characteristic.Power saving class is defined as one group of connection with same requirements.In 802.16e, have 3 kinds of power saving class, each type has different parameter sets, applicable business and implementation.The first type (type i) is applicable to do one's best and non real-time variable Rate business.The second type (Type II) is applicable to UGS and real-time variable Rate business.The third type (type-iii) is applicable to multicast and connects and the operation relevant to management.For example,, referring to X.Yang, " Energy Saying Mechanism in the IEEE 802.16e WirelessMAN ", IEEE Communication Letters, vol.9, no.7, pp.595-597, July.2005.
In above-mentioned two kinds of power-saving mechanisms, the major issue of existence is that subscriber equipment cannot determine whether buffer memory need to mail to the data of self to network side in advance, and then determines whether to enter resting state by state of activation.For this problem, LTE has proposed corresponding solution.For example, subscriber equipment receives after a packet, opens deexcitation timer, and now subscriber equipment is in the deexcitation phase.If there are data to arrive before timer expired, subscriber equipment stays open state, and active period continues; Otherwise subscriber equipment enters rest period.For example,, referring to R2-075009, " Open issues on DRX ", Samsung, RAN 2 meeting#60, November 5th-9
th, 2007, Jeju, Korea.In fact, in the previous deexcitation phase that enters resting state, subscriber equipment does not but receive any data in accepting state.This situation can be considered as the cost that subscriber equipment is paid in order to confirm " network side does not have buffer memory need to mail to the data of self ".This cost is the energy loss of subscriber equipment.In the power-saving mechanism of UMTS and 802.16e system, by active period/enable mode to rest period/park mode be also excessively that mode by deexcitation timer realizes, there is equally the phenomenon of above-mentioned subscriber equipment energy loss.
At present, some solutions to the problems described above have been proposed.For example, on July 26th, 2007, disclosed PCT patent application WO 2007/082934 A1 proposed the method (Method for dynamicaily adapting the DRXcycle length in a radio communication system) of dynamic self-adapting DRX cycle length in radio communications system.The method dynamically changes DRX according to information such as data volumes.But this can not, by distribute with resource the mode combining, carry out DRX configuration flexibly and fast and effeciently.On October 4th, 2007 disclosed PCT patent application WO 2007/111480 A1 proposed a kind of in mobile communication system for connecting the method and apparatus (Method and apparatus for discontinuousreception of connected terminal in a mobile communication system) of the discontinuous reception of terminal.The method proposed to adopt packet incidentally the mode of set bit indicate whether notebook data bag is last packet, and then whether indication travelling carriage can enter sleep state.Yet there is following defect in this incidentally mode, that is, because data packet transmission adopts HARQ mechanism, there is the hidden danger that propagation delay time is larger, can not complete the real-time control to subscriber equipment DRX state.
Summary of the invention
Complete in view of the above problems the present invention, the object of this invention is to provide a kind of method and apparatus of dynamically controlling adaptively the discontinuous reception of subscriber equipment.Whether the method and device still have the data that will send to each schedulable subscriber equipment after determining this dispatching cycle, and be expressed as flag bit and joined in this cycle schedule information, thereby utilize schedule information auxiliarily dynamically to adjust the time of (stop or extend) subscriber equipment receiver open mode, with the energy-saving effect of realizing ideal, and guarantee quality of service QoS.
According to an aspect of the present invention, provide a kind of method of dynamically controlling adaptively the discontinuous reception of subscriber equipment, comprise step:
Schedulable user equipment allocation resource in network side is dispatching cycle, and determine after this dispatching cycle, whether to still have the data that will send to each schedulable subscriber equipment;
According to definite result, the sign that indicates whether to still have the data that will send to described subscriber equipment to subscriber equipment is set, and set sign is sent to subscriber equipment together with schedule information; With
Described subscriber equipment, according to the sign receiving, is controlled receiver and is entered rest period or continue to be in active period.
According to another aspect of the present invention, provide a kind of device of dynamically controlling adaptively the discontinuous reception of subscriber equipment, comprising:
Be arranged in base station,
Service queue unit, for ranking to sending to the packet of subscriber equipment;
Scheduling unit, at least, according to the quality requirement of business, channel condition information is dispatched sending to the business of subscriber equipment, and produces schedule information;
Discontinuous reception predicting unit, be used for according to the information prediction of schedule information and the data buffer relevant data bag resource distribution of next dispatching cycle, and the sign that indicates whether to still have the data that will send to described subscriber equipment to subscriber equipment is set according to predicting the outcome;
Transmitter unit, for launching the schedule information of generation and the sign of setting, and
Be arranged in subscriber equipment,
Receiving element, for receiving control information and business datum and the described sign from network side;
Control information and data decode and decision unit, for decoding to the control information receiving and business datum and described sign; With
Discontinuous reception control unit, for controlling according to described sign the state that receiving element enters rest period or continues to be in active period.
According to the present invention, in down dispatch information, added flag bit, this flag bit is to subscriber equipment indication in next dispatching cycle, and whether network side has the data that will send to subscriber equipment, and by the schedule information of this dispatching cycle, this flag bit is indicated to subscriber equipment.
The present invention is by service quality (QoS) demand of consideration business and the state of system data buffer, dynamically adjust DRX mechanism, thereby can adjust easily the state of subscriber equipment receiver, make subscriber equipment can from this mode, obtain efficiently energy-conservation gain.
Accompanying drawing explanation
By below in conjunction with accompanying drawing explanation the preferred embodiments of the present invention, will make of the present invention above-mentioned and other objects, features and advantages are clearer, wherein:
Fig. 1 shows the schematic diagram at the DRX control device at place, network side base station according to the embodiment of the present invention;
Fig. 2 shows according to the embodiment of the present invention schematic diagram at the DRX of user equipment side control device;
Fig. 3 shows dynamically to adjust adaptively the operational flowchart of DRX according to the scheduler of the embodiment of the present invention;
Fig. 4 shows according to the embodiment of the present invention to utilize flag bit to control the flow chart of DRX state;
Fig. 5 shows according to the operational flowchart of the DRX prediction module of the embodiment of the present invention; With
Fig. 6 shows the schematic diagram that utilizes flag bit to control the opening and closing state of subscriber equipment.
Embodiment
With reference to the accompanying drawings embodiments of the invention are described in detail, in description process, having omitted is unnecessary details and function for the present invention, to prevent that the understanding of the present invention from causing, obscures.
Fig. 1 shows according to the present invention (an embodiment of the DRX control device of for example, eNB) locating in network side base station.As shown in Figure 1, the DRX control device at place, base station comprises service queue module 11, scheduler module 12, discontinuous reception (DRX) prediction module 13, and transmitter module 14.
For the DRX of dynamic modulation subscriber equipment adaptively, the DRX control device at place, base station disposes DRX prediction module 12.In the time will sending to the downlink grouped of subscriber equipment and arrive network side, first packet enters in the business module queue 11 of the DRX control device being arranged in base station and ranks.When scheduling constantly arrives, scheduler module 12 is according to the qos requirement of business, channel condition information, and the information such as queue are dispatched sending to user's business.After having dispatched, on the one hand, scheduler module 12 passes to transmitter module 14 by the grouping being dispatched to and sends.On the other hand, scheduler module 12 notifies the information of packet in scheduling result and data buffer to DRX prediction module 13.
DRX prediction module 13 is by the resource allocation conditions of the information prediction next dispatching cycle of packet the schedule information obtained from scheduler module 12 and data buffer, and flag bit is set according to predicting the outcome.Finally, by transmitter module 14, together with the schedule information of flag bit and this dispatching cycle, by correlated channels, continue downlink transfer.Be noted that this DRX control device can be positioned at identical physical entity with the Resource Scheduler of network side, but the invention is not restricted to this, DRX control device also can be positioned at different physical entities.
Fig. 2 shows according to the present invention at an embodiment of the DRX of user equipment side control device.As shown in Figure 2, the DRX control device of user equipment side comprises receiver module 21, control information and data decode and judging module 22, and DRX control module 23.
The control information such as schedule information and business datum that receiver module 21 in subscriber equipment receives from network side.Then, receiver module 21 passes to control information and data decode and judging module 22 by control information and business datum.22 pairs of control informations that receive of control information and data decode and judging module and business datum are decoded, and decoding is obtained, control relevant information to DRX and notify to DRX control module 23.DRX control module 23 is controlled the state of receiver module 21 according to this information, thereby realizes the control function of dynamically adjusting adaptively discontinuous reception.
In self adaptation, dynamically adjust in the process of DRX, the DRX length of the cycle of each configuration is fixed.Each DRX length of the cycle comprises an active period and a rest period.Initial active period length is fixed.When the flag bit in schedule information is " 1 ", indication can dynamically extend a dispatching cycle (1 or several Transmission Time Interval (TansmissionTime Interval, TTI)) by the active period of subscriber equipment.When the flag bit in schedule information is " 0 ", indication can make the active period of subscriber equipment stop, and enters rest period.
Subscriber equipment in active period is receiving after the schedule information that carries " 0 " flag bit, directly by active period, enter rest period, and be not required to be confirmation " whether network side is cached with the data that need to send to this subscriber equipment self " and unlatching deexcitation timer.Therefore, subscriber equipment determines it is to extend active period by distinguishing mark bit, still directly by active period, enters rest period, thereby has avoided by entering the power consumption that the deexcitation phase causes.Rest period lasts till that this DRX circulation finishes.After this DRX circulation finishes, enter the active period of next DRX circulation.
In self adaptation of the present invention, dynamically adjust in the method for DRX, the flag bit in schedule information comes equipment for indicating user how DRX dynamically to be adjusted.The state information of the subscriber equipment receiver being provided in conjunction with DRX control module by scheduler module arranges flag bit, and traffic carrying capacity and resource allocation policy in the buffer of flag bit and network side base station (eNB) are relevant.
Fig. 3 shows scheduler module and dynamically adjusts adaptively the operational flowchart of DRX.After starting dispatching cycle, at step S301, the information that scheduler module 12 provides in conjunction with DRX control module is the user equipment allocation resource in can dispatched users set within this dispatching cycle.At this, can dispatched users refer at the subscriber equipment of this dispatching cycle of inner receiver in open mode.Schedulable all subscriber equipmenies form adjustable degree user set.After resource is distributed and to be finished, whether scheduler module 12 still has and for example will send to, in data buffer storage that each can scheduling user's set (user i) buffer at eNB in step S302 judgement after this dispatching cycle.If judgment result is that in step S302 is negative, there is no to send to the data of subscriber equipment i (UE), scheduler module flag bit is set to " 0 ", there is no to send to the data of subscriber equipment i with notifying user equipment i network side within next dispatching cycle.If be also cached with the data that will be dealt into subscriber equipment i at step S302 judgement network side, flow process forwards step S303 to.At step S303, DRX prediction module is predicted in the scheduling result of next dispatching cycle subscriber equipment i.After this, at step S304, DRX prediction module judgement scheduling user's set i whether in next dispatching cycle.If predicted the outcome, show scheduling user's set i in next dispatching cycle, flow process forwards step S305 to, and the flag bit that will send to subscriber equipment i is set to " 1 ", will send to the data of subscriber equipment i in addition to subscriber equipment i indication network side.Next, at step S307, scheduler module 12 writes flag bit in the schedule information of this dispatching cycle, and sends to subscriber equipment i by transmitter module 14.On the other hand, when DRX prediction module in step S304 judgement in next dispatching cycle not during scheduling user's set i, flow process forwards step S306 to, the flag bit that will send to subscriber equipment i is set to " 0 ", there is no to send to the data of subscriber equipment i to subscriber equipment i indication network side.After this, flow process forwards step S307 equally to, and scheduler module 12 writes flag bit " 0 " in the schedule information of this dispatching cycle, and by correlated channels, sends to subscriber equipment i by transmitter module 14.So far finish this dispatching cycle.
After subscriber equipment receives the flag bit in schedule information, according to the value of this flag bit, dynamically control subscriber equipment receiver state.Fig. 4 shows subscriber equipment and utilizes flag bit to control the flow chart of DRX state.As shown in Figure 4, at step S401, can suppose that user's initial condition is rest period.After this, at step S402, judge whether the rest period of subscriber equipment finishes.If the rest period of subscriber equipment does not finish, flow process is returned to step S401, and subscriber equipment continues to be in resting state.If be through with rest period at step S402 judgement subscriber equipment, subscriber equipment enters active period at step S403 by rest period, or continues to be in active period.At subscriber equipment, enter after active period, at step S404, judge whether subscriber equipment receives schedule information.If subscriber equipment does not receive relevant schedule information, subscriber equipment returns to step S401 after the set time, enters rest period.If receive relevant schedule information at step S404 judgement subscriber equipment, flow process proceeds to step S405.At step S405,22 pairs of schedule informations that receive of the control information in subscriber equipment and data decode and judging module are decoded, and to obtain control information and business datum, and whether the flag bit that judgement sends together with schedule information is " 1 ".If be " 1 " at step S405 judgement symbol bit, flow process turns back to step S403, by DRX control module 23, make subscriber equipment continue to be in active period in next dispatching cycle, that is, the indication that is " 1 " according to flag bit has extended the active period of subscriber equipment.In LTE system, can realize by opening deexcitation timer the prolongation of active period.If be " 0 " at step S405 judgement symbol bit, flow process turns back to step S401, by DRX control module 23, make subscriber equipment enter rest period in next dispatching cycle,, the indication that is " 0 " according to flag bit stops the active period of subscriber equipment, in LTE system, thereby can not open deexcitation timer, make user enter rest period immediately.This process circulation is carried out, can make thus subscriber equipment receiver predict according to schedule information and user's business information, by flag bit is set in schedule information, control state dormancy and the state of activation of subscriber equipment receiver, effectively reduce the power consumption of subscriber equipment.
According to embodiments of the invention, the resource allocation conditions that DRX prediction module 13 is predicted next dispatching cycle by the information of the packet of buffer memory the information obtained from scheduler module and data buffer, and the flag bit that sends to respective user equipment is set accordingly, then flag bit is added in schedule information.Subscriber equipment receives after the schedule information that carries flag bit, according to flag bit, controls receiver state.
Below with reference to Fig. 5, describe according to the operation embodiment of the DRX prediction module of the embodiment of the present invention.Fig. 5 shows the operating process of DRX prediction module.In the DRX forecasting process that DRX prediction module is carried out, first, at step S501, the DRX information that DRX prediction module 13 provides in conjunction with service queue module 11, the S set that renewal can scheduling user's set
1middle user's information and sub-band information.The state information that scheduler module 12 provides according to DRX prediction module 13 forms the user of this dispatching cycle of inner receiver in opening can dispatched users S set
1, renewal can dispatched users S set
1middle user's information and sub-band information.In the present embodiment, down link can adopt multiple access technique based on OFDMA to user device transmissions schedule information.Be noted that and the invention is not restricted to this, also can adopt other multiple access technique.After this, at step S502, the equal adoption rate fair scheduling algorithm pair set S of scheduler module 12 and DRX prediction module 13
1user dispatch, the schedule information of generation can be expressed as V
1.Can suppose by User Priority and calculate, producing the user set that can obtain resource in this dispatching cycle is S
2.In other words the user who, scheduling is obtained forms S set
2.Relevant proportional fair scheduling can reference: Kaneko M, Popovski P, the article that is entitled as " Proportional fairness in multicarrier system:upper bound andapproximation algorithm " that Dahl J delivers is (referring to IEEE CommunicationLetter, 2006,10 (6): 462-464).The function of scheduler module 12 has been the resource allocation process in this dispatching cycle.Compare with scheduler module 1, DRX prediction module 13 adopts identical dispatching algorithm and in conjunction with the state information of network side data buffer, the resource allocation result to user within next dispatching cycle is predicted.
Specifically, DRX prediction module 13 can be S to user's set
2user carry out the prediction of scheduling result next time, forecasting mechanism is to predict at service buffer device information and the system resource allocation strategy of network side according to user.
Accordingly, at step S503, judgement S set
2in the length of data queue L of user i map network side
iwhether be greater than 0.If L
i=0, show that network side does not have to send to the business datum of subscriber equipment i in next dispatching cycle.In this case, flow process forwards step S507 to, and corresponding flag bit is set to " 0 ".If at step S503 judgement length of data queue L
i> 0, and flow process proceeds to step S504, and this user is placed in to S set
3in (S
3={ j|j ∈ S
2∩ L
j> 0}).In the present embodiment, can upgrade S set according to formula (1) below
3middle user's Mean Speed, and predict S set in next dispatching cycle according to formula (2) and (3) below
3in all users' dispatching priority.
R
i′(t+1)＝R
i(t)，i∈S
3 (2)
R wherein
i' be (t) user i at the t Mean Speed before constantly, R
i(t) be the Mean Speed that user i upgrades after t dispatches constantly, r
i, n(t) be the upper data rate of supporting of subband n of distributing to user i.When group carrier wave n is distributed to user i, c
i, n=1, otherwise, c
i, n=0, t
cstatistical window for user rate.P
i, n(t+1) be the priority of user i on subband n in the next dispatching cycle of prediction.By pair set S
3in prediction and the comparison of all User Priorities, at step S505, judge whether user i belongs to user's set that in next dispatching cycle, prediction is scheduled.If judgment result is that certainly in step S505, that is, user i belongs to the user's set being scheduled in next dispatching cycle, and flow process proceeds to step S506, and flag bit is established to set.After this, at step S508, by the flag bit of setting and the schedule information V that produces in this dispatching cycle
1in conjunction with generating schedule information V
2.
If judgment result is that in step S505 is negative, that is, user i does not belong to the dispatched users set of next dispatching cycle, and flow process forwards step S507 to, and flag bit is set to " 0 ".After this, flow process proceeds to step S508 equally, will be set to the flag bit of " 0 " and the schedule information V producing in this dispatching cycle
1in conjunction with generating schedule information V
2.So far finish this dispatching cycle.
As an alternative, DRX prediction module 13 can adopt another kind of mode of operation, and wherein dispatching algorithm and corresponding DRX prediction algorithm all adopt poll (Round Robin) algorithm.
Specifically, the state information that scheduler module 12 provides according to DRX prediction module 13 forms the user of this dispatching cycle of inner receiver in opening can dispatched users S set
1, according to the user of polling algorithm pair set S1, dispatch the schedule information V of generation
1.After can supposing and by polling algorithm, the order of user scheduling being calculated, producing user's set that can obtain resource in this dispatching cycle is S
2.13 pairs of user's set of DRX prediction module are S
2user carry out the prediction of scheduling result next time, as an example, can at service buffer device information and the system resource allocation strategy of network side, predict according to user.
First, need to judge S set
2in the length of data queue L of user i map network side
iif, L
i=0, the flag bit that this subscriber equipment is corresponding is set to " 0 "; If L
i> 0, this user is placed in to S set
3in (S
3={ j|j ∈ S
2∩ L
j> 0}).According to poll strategy to user's S set
3middle user's scheduling sequence carries out order and arranges and dispatch.Suppose according to system available resources, the maximum dispatched users number that can support is N
m, the current number of users of system is N
cif, N
c≤ N
m, can estimate next scheduling constantly, each user can be dispatched to, and therefore the flag bit corresponding with user is set to " 1 "; If N
c> N
m, according to the strategy of poll, give successively the corresponding resource of user assignment, until be assigned to the number of users of resource, equal N
m, then unallocatedly to flag bit corresponding to the user of resource, be set to " 0 ".After this, the flag bit of setting is placed in to the schedule information V of generation
1in, complete all resource allocation information V in this dispatching cycle
2, so far finish this dispatching cycle.
Fig. 6 shows to utilize flag bit to control the schematic diagram of the opening and closing state of subscriber equipment.First scheduler module 12 obtains the relevant information of the DRX state of relevant user i, and by buffer, obtains the information that whether has the data that will send to subscriber equipment.Then, at the receiver of user i, the data of user i dispatched and according to the information of forecasting of DRX prediction module, flag bit are set during in open mode, then flag bit being inserted to schedule information and issue together user i.As shown in Figure 6, user i dynamically controls the opening and closing state of receiver state according to the flag bit receiving from eNB (base station).In Fig. 6, the blank box consisting of solid line represents fixedly active period, and the blank box consisting of dotted line represents the deexcitation phase, and shaded bar represents downlink data, and arrow represents schedule information.As can be seen from Figure 6,, in first and the 3rd DRX circulation, because the flag bit of subscriber equipment k the schedule information receiving from eNB is set to " 1 ", show that network side will send to the data of subscriber equipment k in addition.Therefore, subscriber equipment k extends the active period of its receiver, enters the deexcitation phase, rather than directly enters rest period.And in the DRX circulation of its excess-three, the flag bit sending together with schedule information is all set to " 0 ", shows that network side does not have to send to the data of subscriber equipment k.Therefore, subscriber equipment k only contains a fixing active period.
Compare with adopting the control mode of deexcitation timer (inactive timer), the present invention can, under the prerequisite of assurance QoS of survice, control subscriber equipment receiver state, thereby make subscriber equipment more effectively save energy consumption more accurately.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that, those skilled in the art without departing from the spirit and scope of the present invention, can carry out various other change, replacement and interpolations.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited by claims.
Claims (21)
1. dynamically control adaptively a method for the discontinuous reception of subscriber equipment, comprise step:
Schedulable user equipment allocation resource in network side is dispatching cycle, and determine after this dispatching cycle, whether to still have the data that will send to each schedulable subscriber equipment;
According to definite result, the sign that indicates whether to still have the data that will send to described subscriber equipment to subscriber equipment was set within this dispatching cycle, and set sign is sent to subscriber equipment together with schedule information;
Described subscriber equipment is according to the sign receiving, controlling receiver enters rest period or continues to be in active period, wherein when described sign indication network side still has the data that will send to described subscriber equipment, described subscriber equipment is controlled receiver and is continued to be in active period, and when described sign indication network side does not have to send to the data of described subscriber equipment, described subscriber equipment is controlled receiver and is not opened deexcitation timer and directly enter rest period.
2. method according to claim 1, thus further comprise that described subscriber equipment controls receiver and by opening deexcitation timer, continue to be in the step of active period.
3. method according to claim 1, further comprises when network side still has the data that will send to described subscriber equipment, is masked as the step of " 1 " described in arranging.
4. method according to claim 1, further comprises when network side does not have to send to the data of described subscriber equipment, is masked as the step of " 0 " described in arranging.
5. whether method according to claim 1, wherein determine and after this dispatching cycle, still have the step of the data that will send to schedulable subscriber equipment to comprise whether the number that judges the packet in the corresponding buffer of subscriber equipment is greater than zero step.
6. method according to claim 5, when the number that further comprises the packet in the corresponding buffer of respective user equipment is greater than zero, determines the step whether described subscriber equipment was scheduled in next dispatching cycle.
7. method according to claim 6, further comprises when described subscriber equipment is when can be scheduled next dispatching cycle, and the step that is masked as " 1 " is set.
8. method according to claim 6, further comprises when described subscriber equipment is when can not be scheduled next dispatching cycle, and the step that is masked as " 0 " is set.
9. method according to claim 1, further comprises that network side, according to the state information of the discontinuous reception providing, upgrades the step of schedulable subscriber equipment.
10. method according to claim 9, further comprises that network side is according to the state information of the discontinuous reception providing, and all subscriber equipmenies of this dispatching cycle of inner receiver in opening is formed to the step of adjustable degree user set.
11. methods according to claim 9, wherein adoption rate fair scheduling algorithm is dispatched schedulable subscriber equipment.
12. methods according to claim 9, further comprise according to the state information of the data of network side buffer memory, the step that the resource allocation result to subscriber equipment within next dispatching cycle is predicted.
13. methods according to claim 9, wherein adopt polling algorithm to calculate the order of schedulable subscriber equipment, produce the subscriber equipment that can obtain resource in this dispatching cycle, and described subscriber equipment is carried out to the prediction of scheduling result next time.
14. according to the method described in claim 12 or 13, further comprises that the method for data that will send to subscriber equipment according to the buffer status after this dispatching cycle and scheduling predicts the step of whether dispatching described subscriber equipment in next dispatching cycle.
15. methods according to claim 1, wherein the length of the cycle of discontinuous reception is fixed, the length of the cycle of each discontinuous reception comprises an active period and a rest period, and when being masked as " 1 ", indication dynamically extends a dispatching cycle by the active period of subscriber equipment.
16. methods according to claim 15, further comprise when being masked as " 1 ", indicate described subscriber equipment to open the step of deexcitation timer.
17. methods according to claim 1, wherein the length of the cycle of discontinuous reception is fixed, the length of the cycle of each discontinuous reception comprises an active period and a rest period, and when being masked as " 0 ", equipment for indicating user receiver enters rest period immediately.
18. methods according to claim 17, further comprise when being masked as " 0 ", indicate described subscriber equipment to close the step of deexcitation timer.
19. 1 kinds of devices of dynamically controlling adaptively the discontinuous reception of subscriber equipment, comprising:
Be arranged in base station,
Service queue unit, for ranking to sending to the packet of subscriber equipment;
Scheduling unit, at least, according to the quality of service requirement of business, channel condition information is dispatched sending to the business of subscriber equipment, and produces schedule information;
Discontinuous reception predicting unit, be used for according to the information prediction of schedule information and the data buffer relevant data bag resource distribution of next dispatching cycle, and the sign that indicates whether to still have the data that will send to described subscriber equipment to subscriber equipment is set within this dispatching cycle according to predicting the outcome;
Transmitter unit, for launching the schedule information of generation and the sign of setting, and
Be arranged in subscriber equipment,
Receiving element, for receiving control information and business datum and the described sign from network side;
Control information and data decode and decision unit, for decoding to the control information receiving and business datum and described sign; With
Discontinuous reception control unit, for controlling according to described sign the state that receiving element enters rest period or continues to be in active period,
Wherein when network side still has the data that will send to described subscriber equipment, described in arranging, described discontinuous reception predicting unit is masked as " 1 ", to indicate described subscriber equipment to control receiver, continue to be in active period, and when network side does not have to send to the data of described subscriber equipment, described in described discontinuous reception predicting unit arranges, be masked as " 0 ", to indicate described subscriber equipment to control receiver, do not open deexcitation timer and directly enter rest period.
20. devices according to claim 19, wherein said scheduling unit distributes the resource in this dispatching cycle.
21. devices according to claim 19, wherein said scheduling unit notifies scheduling result and information to described discontinuous reception predicting unit.
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| CN200810002865.6A CN101483446B (en) | 2008-01-08 | 2008-01-08 | Method and apparatus for dynamically controlling uncontinuous receiving |
| JP2009002385A JP5396087B2 (en) | 2008-01-08 | 2009-01-08 | Method and apparatus for dynamically controlling intermittent reception |
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| CN200810002865.6A CN101483446B (en) | 2008-01-08 | 2008-01-08 | Method and apparatus for dynamically controlling uncontinuous receiving |
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| JP5396087B2 (en) | 2014-01-22 |
| JP2009165131A (en) | 2009-07-23 |
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