CN102014469A - Discontinuous reception method, system and equipment in multi-carrier system - Google Patents
Discontinuous reception method, system and equipment in multi-carrier system Download PDFInfo
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Abstract
The embodiment of the invention discloses a discontinuous reception method in a multi-carrier system. The method comprises the following steps of: selecting a member carrier which is in an activated state at present from a plurality of member carriers supported by a terminal by a base station; carrying discontinuous reception cycle (DRX CYCLE) information in a discontinuous reception media access control cell (DRX MAC CE) of a media access control layer; and transmitting the DRX MAC CE to the terminal by using the member carrier to notify that the terminal monitors a control channel on a part of or all the member carriers in the plurality of member carriers supported by the terminal according to the DRX CYCLE. The embodiment of the invention also discloses a multi-carrier communication system and multi-carrier communication equipment. By using method, the system and the equipment, a DRX mechanism is adopted by the terminal supporting the plurality of member carriers in a long term evolution-advanced (LTE-A) system for monitoring the control channel.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to discontinuous receiving method, system and equipment in a kind of multicarrier system.
Background technology
In mobile communication system based on shared channel, for example in the Long Term Evolution (LTE), the transmission of up-downgoing data is responsible for control by base station (eNB) scheduler, when scheduler is determined certain user of scheduling, will notify terminal to send or receive data on which kind of resource by control channel.Terminal (UE) monitoring control channel when detecting the schedule information that comprises self, is finished the transmission or the reception of data according to the indication on the control channel.Under state of activation, because when the uncertain eNB of terminal dispatch it, therefore a kind of common mode of operation is, the continuous monitoring control channel of terminal is all resolved the subframe on each descending scheduling control channel, is scheduled judging whether.This working method is bigger in the terminal data amount, can obtain higher efficient under the situation about may frequently be dispatched.Yet professional for some, the arrival frequency of data is lower, and the number of times that causes terminal to be scheduled is also less, if the still continuous monitoring control channel of terminal can increase its power consumption undoubtedly.In order to solve the power consumption problem, the LTE system adopted discontinuous reception (Discontinuous Reception, DRX) mode of operation, under this mode of operation, terminal periodic control channel is monitored, thereby reach the purpose of economize on electricity.
The basic principle of DRX as shown in Figure 1.Wherein On duration represents the time period of UE monitoring control channel, and open the radio-frequency channel of UE in this time period, and continuous monitoring control channel; Remove outside the Onduration At All Other Times, UE is in sleep (Sleep) state, and the radio frequency link of UE will be closed, and monitoring control channel no longer is to reach purpose of power saving.On Duration periodically occurs, and the concrete cycle (Cycle) is realized by the eNB configuration.
The DRX mechanism of LTE has been considered the arrival model of data service, i.e. the arrival of packet happens suddenly, and can be understood as, in case there is packet to arrive, can arrive more grouping within a short period of time continuously so.In order to adapt to this professional arrival characteristics, the DRX process has adopted multiple timer, and combines with mixing automatic repeat requests (HARQ) process, in the hope of reaching better electricity saving performance.
The relevant timer of DRX comprises following several:
Continue to monitor timer (On duration timer): UE and periodically wake up time of monitoring control channel, as shown in Figure 1;
Short DRX cycle timer (Short DRX cycle Timer): for the characteristics that the better fit data service arrives, the LTE system allows two kinds of DRX cycle:long cycle of configuration and short cycle.The on duration timer of two kinds of cycle is identical, but the time of sleep is different.In short cycle, the sleep time is shorter relatively, UE can be quickly monitoring control channel once more.Long cycle must dispose, and is the initial condition of DRX process; Short cycle is optional.Short DRX cycle timer is provided with the time of adopting short cycle to continue.After Short cycle timer is overtime, UE will use Long cycle;
The non-Active Timer of DRX (DRX Inactivity Timer): after having disposed DRX, when receiving the control signaling of HARQ initial transmission, opens UE (Active Time) in the time of permission monitoring control channel this timer, before this timer expiry, the continuous monitoring control channel of UE.If before Inactivity Timer is overtime, UE receives the control signaling of HARQ initial transmission, will stop and restart Inactivity Time;
Timer two-way time (RTT Timer): be only applicable to down link (DL), make UE might be before retransmit arriving next time monitoring control channel not, reach better power savings.If UE has received the control signaling of HARQ transmission (initial transmission or re-transmission), will open this timer.If the data in the corresponding HARQ instance process are preceding HARQ transmission back decoding unsuccessful (being UE feedback NACK), after RTTTimer was overtime, UE opened Retransmission Timer.If the data in the corresponding HARQ instance process are decoded successfully (being the UE feeding back ACK) in preceding HARQ transmission back, behind RTT Timer timer expiry, UE does not start Retransmission Timer.If current have only RTT Timer to move, UE is monitoring control channel not;
Retransmission timer (Retransmission Timer): be only applicable to DL.At Retransmission Timer therebetween, UE monitors the control signaling, waits for the retransfer scheduling of corresponding HARQ instance process.
Fig. 2 has provided the course of work and the correlation of above-mentioned several timers:
In the t1 moment during on duration, eNB has dispatched the initial transmission at process 1 (process 1), so UE opens Inactivity Timer and corresponding RTT Timer1.Because the decoding of the initial transmission of Process 1 is unsuccessful, after RTT Timer was overtime, UE had opened Retransmission Timer1;
In the t2 moment, eNB has dispatched the initial transmission at process 1 (Process 2), and Inactivity Timer is restarted, and opens the RTT Timer2 at Process 2 simultaneously;
In the t3 moment before Retransmission timer1 is overtime, UE has received the re-transmission at Process 1, then stop Retransmission Timer1, and open RTT Timer1;
After RTT Timer2 was overtime, the success because the initial transmission of Process 2 is not decoded was so UE opens Retransmission Timer2.In the t4 moment before Retransmission Timer2 is overtime, eNB has dispatched the re-transmission of Process 2, so UE stops Retransmission Timer2, opens RTT Timer2;
In the t5 moment before Retransmission Timer1 is overtime, eNB has continued to dispatch the re-transmission of Process 1, so Retransmission Timer1 is terminated, starts RTT Timer1 simultaneously.Before RTTTimer2 was overtime, UE was to the success of the data decode among the Process 2, so to the eNB feeding back ACK, after RTT Timer2 is overtime, also do not restart Retransmission Timer2 simultaneously.Equally, before RTTTimer1 was overtime, UE was to the success of the data decode among the Process 1, so to the eNB feeding back ACK, after RTT Timer1 is overtime, also do not restart Retransmission Timer1.
By said process as can be seen, in On duration Timer, Retransmission Timer and Inactivity Timer, have any one timer to move, UE is with monitoring control channel.
The time of UE monitoring control channel is called activationary time (Active Time) again.Active Time is influenced by other factors also except the influence that is subjected to the DRX timer in the LTE system, and the Active Time of UE comprises the following time in the 8th version (Re1-8) of LTE:
The time of competition judgement timer (mac-ContentionResolutionTimer) operation of On Duration Timer or Inactivity Timer or Retransmission Timer or medium Access Layer; UE sends uplink scheduling request (Scheduling Request, SR) time of back wait base station transmission Physical Downlink Control Channel (PDCCH); Monitoring is at the time of uplink synchronous self adaptation retransfer scheduling signaling; Send random access lead code (preamble) back and wait for the time of accidental access response.
There is discontinuous receiving media access control control cell (DRX MAC CE) mechanism in the DRX mechanism of LTE, after UE receives DRX MAC CE in this mechanism, will returns to the state that adopts short DRX cycle or long DRX cycle immediately.DRX MAC CE is sent by the base station, the processing that UE receives behind the DRX MAC CE is as follows: stop on Duration Timer and Inactivity Timer, if disposed short DRX cycle, then start/restart Short Cycle Timer and use Short DRX Cycle, if do not dispose short DRX cycle, then use Long DRX cycle.
DRX MAC CE comprises MAC head (MAC subheader) and DRX MAC CE in the LTE system, and MAC subheader as shown in Figure 3; DRX MAC CE is a fixed size, and byte (byte) number is 0.
Each Field Definition is as follows among Fig. 3:
R: keep the bit territory, be traditionally arranged to be 0;
E: extension field, be set to 1 expression byte in back and comprise the R/R/E/LCID territory at least, being set to the next byte of 0 expression is medium access control service data unit (MAC SDU) or MAC CE or padding;
LCID: logical channel number, be used to represent follow-up MAC SDU or the logical channel number of MAC CE or padding, as shown in the table, the logical channel number of DRX MAC CE correspondence is 11110 in the LTE system;
In the LTE system, in the sub-district carrier wave can only be arranged, and maximum bandwidth is 20Mhz, as shown in Figure 4.
In LTE-A, the peak rate of system has huge raising than LTE, requires to reach descending 1Gbps, up 500Mbps.On the bandwidth of 20Mhz, can't satisfy this demand.LTE-A system introducing carrier aggregation (Carrier Aggregation, CA) technology is in the promptly same sub-district, with continuous or discrete a plurality of member carriers (Component carrier, CC) concentrate in together, when needed simultaneously for the UE service, so that required speed to be provided.For the UE that guarantees LTE can work under the member carrier of each polymerization, each member carrier maximum is no more than 20MHz, is 5 for the maximum carrier wave number of LTE-A system polymerization.
For example, in the LTE-A sub-district shown in Figure 5, polymerization 4 CC.Transfer of data can be carried out with UE simultaneously in the base station on 4 member carriers, to improve throughput of system, also can only dispatch UE on portion C C.
In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:
For the LTE-A system, introduced the multicarrier notion, but also do not had implementation at present at the DRX mechanism of LTE-A system, make terminal can't adopt DRX mechanism to carry out the monitoring of control channel.
Summary of the invention
The embodiment of the invention provides discontinuous receiving method, system and the equipment in a kind of multicarrier system, is used for solving LTE-A system terminal and can't adopts DRX mechanism to carry out the technical problem that control channel is monitored.
Discontinuous receiving method in a kind of multicarrier system, this method comprises:
The current member carrier that is in state of activation is chosen in the base station from a plurality of member carriers of terminal support;
The base station is carried at discontinuous receiving cycle (DRX CYCLE) information in the discontinuous reception control cell (DRX MAC CE) of discontinuous receiving media access control layer;
The base station utilizes described member carrier that described DRX MAC CE is sent to described terminal, notifying described terminal selected part or whole member carriers in a plurality of member carriers that self supports, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
A kind of multi-carrier communications systems, this system comprises:
The base station is used for choosing the current member carrier that is in state of activation from a plurality of member carriers of terminal support; Discontinuous receiving cycle (DRX CYCLE) information is carried in the discontinuous reception control cell (DRX MAC CE) of media access control layer; Utilize described member carrier that described DRX MAC CE is sent to described terminal;
Terminal, be used to receive described DRX MAC CE after, selected part or whole member carriers in a plurality of member carriers that self supports, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
A kind of base station, this base station comprises:
Send carrier wave and choose the unit, be used for choosing the current member carrier that is in state of activation from a plurality of member carriers of terminal support;
DRX cycle carries the unit, is used for discontinuous receiving cycle (DRX CYCLE) information is carried at the discontinuous reception control cell (DRX MAC CE) of media access control layer;
The cell transmitting element, the member carrier that is used to utilize described transmission carrier wave to choose unit selection sends to described terminal with described DRX MAC CE, notifying described terminal selected part or whole member carriers in a plurality of member carriers that self supports, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
A kind of terminal, this terminal comprises:
The cell receiving element, cell (DRX MAC CE) is controlled in the discontinuous reception that is used for the media access control layer that send the reception base station on member carrier, carries discontinuous receiving cycle (DRX CYCLE) information among this DRX MAC CE;
The channel-monitoring unit is used at a plurality of member carrier selected parts of self supporting or whole member carriers, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
Among the present invention, the current member carrier that is in state of activation is chosen in the base station from a plurality of member carriers of terminal support, DRX CYCLE information is carried among the DRX MAC CE, and utilize the member carrier choose that DRX MAC CE is sent to terminal, terminal on the part or all of member carrier of self supporting according to described DRX CYCLE monitoring control channel.Therefore which kind of DRX CYCLE monitoring control channel is terminal can determine certain or certain several member carriers according to according to the indication of base station, and then realized supporting in the LTE-A system that the terminal of many member carriers adopts DRX mechanism to carry out the monitoring of control channel.
Description of drawings
Fig. 1 is a DRX process schematic diagram in the prior art;
Fig. 2 is a DRX operating process schematic diagram in the prior art;
Fig. 3 is the MAC header structure schematic diagram of DRX MAC CE in the prior art;
Fig. 4 is a LTE carrier wave schematic diagram in the prior art;
Fig. 5 is a LTE-A carrier aggregation schematic diagram in the prior art;
Fig. 6 is a method flow schematic diagram in the embodiment of the invention;
Fig. 7 A is the first kind of structural representation of DRX MAC CE in the embodiment of the invention;
Fig. 7 B is the second kind of structural representation of DRX MAC CE in the embodiment of the invention;
Fig. 7 C is the third structural representation of DRX MAC CE in the embodiment of the invention;
Fig. 8 A is the DRX MAC CE schematic diagram in the embodiment of the invention one;
Fig. 8 B is another DRX MAC CE schematic diagram in the embodiment of the invention one;
Fig. 8 C is the DRX MAC CE schematic diagram in the embodiment of the invention two;
Fig. 8 D is another DRX MAC CE schematic diagram in the embodiment of the invention two;
Fig. 8 E is the DRX MAC CE schematic diagram in the embodiment of the invention three;
Fig. 8 F is another DRX MAC CE schematic diagram in the embodiment of the invention three;
The system configuration schematic diagram that Fig. 9 provides for the embodiment of the invention;
The architecture of base station schematic diagram that Figure 10 provides for the embodiment of the invention;
The terminal structure schematic diagram that Figure 11 provides for the embodiment of the invention.
Embodiment
In order to make the terminal in the LTE-A system adopt DRX mechanism to carry out the monitoring of control channel, the embodiment of the invention provides the discontinuous receiving method in a kind of multicarrier system, in this method, the base station sends media access control layer on member carrier discontinuous reception control cell (DRX MAC CE) carries out the monitoring of control channel according to the discontinuous receiving cycle (DRX CYCLE) of DRX MAC CE indication with the notice terminal on the part or all of member carrier of self supporting.
Referring to Fig. 6, the discontinuous receiving method in the multicarrier system that the embodiment of the invention provides specifically may further comprise the steps:
Step 60: the current member carrier that is in state of activation is chosen in the base station from a plurality of member carriers of terminal support;
Step 61: the base station is carried at DRX CYCLE information among the DRX MAC CE;
Step 62: the base station utilizes the member carrier of choosing that DRX MAC CE is sent to terminal;
Step 63: after terminal receives DRX MAC CE, selected part or whole member carriers in a plurality of member carriers that self supports, and on the member carrier of choosing according to the DRX CYCLE monitoring control channel that carries among the DRX MAC CE.
In the step 60, the member carrier base station of terminal support is also necessarily supported generally speaking, so the member carrier of base station selection only need satisfy two conditions: the one, and the terminal support, the 2nd, activate with respect to this terminal.If the situation that the member carrier base station of terminal support is not necessarily supported occurs, the member carrier of base station selection also needs to satisfy the condition that the base station is supported except needs satisfy above-mentioned two conditions.
In the step 61, the base station can be carried at DRX CYCLE information in the MAC head or the DRX MAC CE after the expansion of DRX MAC CE.Concrete, DRX CYCLE information is carried in the R territory, reservation territory of MAC head or DRX MAC CE.
DRX CYCLE information comprises short DRX cycle (SHORT DRX CYCLE) or long DRX cycle (LONG DRX CYCLE) etc.
Preferable, before the base station sent to terminal with DRX MAC CE, the base station is the selected part member carrier in a plurality of member carriers that are terminal configuration, and the identification information of the member carrier chosen is carried among this DRX MAC CE; Terminal is then chosen the member carrier of the sign correspondence of described member carrier in a plurality of member carriers that self supports, and on this member carrier according to the DRXCYCLE monitoring control channel that carries among the DRX MAC CE.
Here, the base station can be carried at the identification information of the member carrier chosen in the MAC header field of DRX MAC CE or in the DRX MAC CE territory after the expansion.Concrete, the base station is carried at the identification information of the member carrier chosen in logical channel number (LCID) territory of MAC head, or the member carrier of the DRXMAC CE after the expansion is indicated in (CC_INDICATOR) territory.
Preferable, before the base station sends to described terminal with DRX MAC CE, the base station will represent that the information that DRXMAC CE possesses the carrier switch ability is carried among this DRX MAC CE; So, terminal according to before the DRX CYCLE monitoring control channel that carries among the DRX MAC CE, should be opened by part or all of member carrier on the part or all of member carrier of choosing.
The base station can also send to terminal with DRX MAC CE, carries the information that this DRX MAC CE of expression possesses the carrier switch ability among this DRX MAC CE; Terminal after receiving this DRX MAC CE is closed described part or all of member carrier.
Here, the information whether base station can possess expression DRX MAC CE the carrier switch ability is carried in the MAC head of DRX MAC CE or among the DRX MAC CE after the expansion, for example, be carried at MAC or expand after the R territory, reservation territory of DRX MAC CE in.
Among the present invention, the base station can be determined to carry Short DRX cycle or Long DRX is cycle at DRX MAC CE according to the traffic carrying capacity of current transmission between this base station and the terminal, and the quantity of the member carrier that carries in DRX MACCE.For example, if current transport service amount big (such as greater than a certain threshold value) is then chosen one or more member carriers, the identification information of the member carrier chosen and Short DRX cycle be carried among the DRX MAC CE send to terminal; , if current transport service amount less (such as less than a certain threshold value), then choose one or more member carriers, the identification information of the member carrier chosen and Long DRX cycle are carried among the DRX MAC CE send to terminal.
The base station is when opening or closing one or more member carrier, also can determine to open or close member carrier according to the traffic carrying capacity of current transmission between this base station and the terminal, and the quantity that opens or closes member carrier, be that a traffic carrying capacity hour obsolete CC can close, open the CC that is in closed condition when traffic carrying capacity is big.For example, if the newly-built business of terminal, then base station selectedly open one or more member carriers, make the member carrier of opening to carry this professional data volume; If business of terminal deletion, then one or more member carriers of this business datum amount of carrying can be selected to close in the base station.
Below the inventive method is specifically described:
The concrete enforcement of the inventive method can be adopted following six kinds of modes:
First kind, continue to use the DRX MAC CE structure of LTE R8, DRX MAC CE on CC is at all CC, UE on certain CC, receive this DRX MAC CE then all CC enter Short DRX cycle, promptly all CC are according to Short DRX cycle monitoring control channel;
Second kind, revise the DRX MAC CE structure of LTE R8, DRX MAC CE on CC is at all CC, UE on certain CC, receive this DRX MAC CE then all CC enter Long DRX cycle, promptly all CC are according to Long DRX cycle monitoring control channel;
The third, change DRX MAC CE structure, DRX MAC CE on CC is at one or more CC, UE receives this DRX MAC CE on certain CC then allows the CC of DRX MAC CE indication enter Short DRX cycle, i.e. the CC of DRX MAC CE indication is according to Short DRX cycle monitoring control channel;
The 4th kind, change DRX MAC CE structure, DRX MAC CE on CC is at one or more CC, UE receives this DRX MAC CE on certain CC then allows the CC of DRX MAC CE indication enter Long DRX cycle, i.e. the CC of DRX MAC CE indication is according to Long DRX cycle monitoring control channel;
The 5th kind, continue to use the DRX MAC CE structure of LTE R8, a DRX MAC CE is at a CC, enters at needs on the CC of short DRX cycle and sends DRX MAC CE respectively; After terminal receives DRX MAC CE, in a plurality of member carriers of self supporting, choose the CC that receives this DRX MACCE, and allow this CC enter Short DRX cycle, even this CC is according to Short DRX cycle monitoring control channel; The DRX MAC CE that the base station sends is with the R8 form;
The 6th kind, change DRX MAC CE structure, a DRX MAC CE is at a CC, LTE MAC CE subheader is expanded, utilize the indication of LCID territory to enter Short DRX cycle or Long DRX cycle, perhaps utilize the indication of R territory to enter Short DRX cycle or Long DRX cycle.After terminal receives DRX MAC CE, in a plurality of member carriers of self supporting, choose the CC that receives this DRX MAC CE; If ShortDRX cycle information is carried in the LCID territory or the R territory of MAC of this DRX MAC CE head, then allow this CC enter Short DRX cycle, even this CC is according to Short DRX cycle monitoring control channel; If Long DRX cycle information is carried in the LCID territory or the R territory of MAC of this DRX MAC CE head, then allow this CC enter Long DRX cycle, even this CC is according to Long DRX cycle monitoring control channel.
The specific implementation of above-mentioned first kind and second kind execution mode is as follows:
In case for UE has disposed Short DRX cycle, then UE receives that DRX MAC CE promptly enters Short DRX cycle, otherwise enters Long DRX cycle according to the R8 agreement.In the LTE-A system, for first kind and second kind of two kinds of situation, if only support first kind of situation, then can continue to use the DRXMAC CE of LTE R8, but in order to support UE to receive to distinguish behind the DRX MAC CE to enter Short DRX cycle or Long DRX is cycle, need to revise DRX MAC CE subheader, the back structure is revised shown in Fig. 7 A as Short DRX cycle/Long DRX cycle indication territory in a R territory that utilizes DRXMAC CE.
The implication in each territory of DRX MAC CE among Fig. 7 A after the expansion is as follows:
The LCID of LCID:DRX MAC CE correspondence, value 11110;
E: extension field, be set to 1 expression byte in back and comprise the R/R/E/LCID territory at least, being set to the next byte of 0 expression is MAC SDU or MAC CE or padding, is set to 0 for this territory of DRX MACCE;
R: keep the bit territory, be traditionally arranged to be 0;
C_F:DRX cycle indicates the territory, and for Short DRX cycle, this territory still value is 0 (the DRX MAC CE that obtains like this is the same with R8 in fact), and for Long DRX cycle, the C_F value is 1.
The specific implementation of above-mentioned the third and the 4th kind of execution mode has following two kinds, a DRX MAC CE can be at a plurality of CC after the difference of two kinds of extended modes was to expand DRX MAC CE length, and remain a DRX MAC CE at a CC behind the MAC subheader of expansion DRX MAC CE, if the DRX state of a plurality of CC of a less important control then needs to send simultaneously the MAC subheader of a plurality of DRX DRXMAC CE.
Scheme one: the length of expansion DRX MAC CE.
The length of the expansion LTE DRX MAC CE of system expands to 1byte by 0byte, and the DRX MAC CE structure after the expansion is shown in Fig. 7 B.
The DRX MAC CE subheader among Fig. 7 B after the expansion and the implication in each territory of DRX MAC CE are as follows:
The LCID of LCID:DRX MAC CE correspondence, value 11110;
E: extension field, be set to 1 expression byte in back and comprise the R/R/E/LCID territory at least, being set to the next byte of 0 expression is MAC SDU or MAC CE or padding, is set to 0 for this territory of DRX MACCE;
R: keep the bit territory, be traditionally arranged to be 0;
C_F:DRX cycle indicates the territory, and be used to indicate UE to receive entering Short DRX cycle behind this DRX MAC CE still is Long DRX cycle, is set to 0 expression such as C_F and enters Short DRX cycle, otherwise enter Long DRX cycle; Realize the DRX cycle indication in R territory in can utilizing DRX MAC CE, can also utilize the R territory of DRX MAC CE subheader to realize identical function;
CC_INDICATOR, member carrier indication territory, the carrier wave number of polymerization in the LTE-A system is 5 to the maximum, indicate the territory so can reserve 5 bit as carrier wave, adopt the bitmap mode, each bit and a member carrier correspondence are if this bit is 1, then represent DRX MAC CE at this carrier wave, otherwise represent that this DRX MAC CE is invalid to this carrier wave; Such as: if CC_INDICATOR is set to 11011, represent that then this DRX MAC CE is simultaneously at carrier wave 1,2,4,5.Certainly reserve 5 bit pointers here to the LTE-A system, if the carrier wave number of other multicarrier system is above 5, then can make an amendment to CC_INDICATOR length of field among the DRX MAC CE according to the carrier wave number, such as utilizing the R territory, if the carrier wave number surpasses 7, this DRX MAC CE can also be expanded to a plurality of byte.Can certainly utilize a R territory among the DRX MAC CE subheader to do C F indication.
Scheme two: do not change the length of DRX MAC CE, the LCID among the MAC subheader of DRX MAC CE is expanded, the corresponding member carrier of each LCID, and utilize reservation territory R to indicate as Short DRX cycle/Long DRX cycle.
Such as for the LTE-A system, it is generally acknowledged that maximum CC number is 5, then the LCID numbering of DRXCommand correspondence can be expanded to 5, the corresponding CC of each LCID from 1.Such as expanding according to following table:
Certainly above is a kind of extended mode of signal, can utilize among the reserved LCID value arbitrarily during realization, needs only terminal and base station negotiate well.
The MAC subheader structure of DRX MAC CE after the expansion is shown in Fig. 7 C, and the length of DRX MAC CE still is 0:
The implication in each territory of DRX MAC CE among Fig. 7 C after the expansion is as follows:
C_F:DRX cycle indicates the territory, and be used to indicate UE to receive entering Short DRX cycle behind this DRX MAC CE still is Long DRX cycle, is set to 0 expression such as C_F and enters Short DRX cycle, otherwise enter Long DRX cycle;
R: keep the bit territory, be traditionally arranged to be 0;
E: extension field, be set to 1 expression byte in back and comprise the R/R/E/LCID territory at least, being set to the next byte of 0 expression is MAC SDU or MAC CE or padding, is set to 0 for this territory of DRX MACCE;
The LCID of LCID:DRX MAC CE correspondence gets different value at different CC;
In addition, if consider the DRX optimization mechanism, promptly carrier wave is carried out ON/OFF according to the traffic carrying capacity of UE request, can also utilize certain reservation territory of DRX MAC CE subheader or DRX MAC CE is the R territory, it is set to 0, and then this DRX MAC CE does not possess the carrier wave on, and it is set to 1, then DRX MAC CE also has the open/close function of carrier wave in control DRX operation, so just need not additionally increase carrier wave ON/OFF signaling newly.
The present invention will be described with specific embodiment below, supposing the system be UE configuration the available carrier wave set for CC1, CC2, CC3, CC4, CC5}:
Embodiment one:
In the present embodiment, { CC among CC1, CC2, CC3, CC4, the CC5} does not consider the DRX optimization mechanism to a DRX MAC CE, does not promptly consider to carry out the carrier wave ON/OFF according to the UE traffic carrying capacity at all available carrier wave set.
Step 1:UE begins to have set up a VOIP business, because data volume is smaller, only utilizes CC3 to carry out channel-monitoring according to Short DRX cycle, and other carrier wave is in Long DRX cycle.
Step 2: when UE converses, need file in download, produce bursty data, at this moment single carrier can not satisfy transmission demand, the base station need expand to multi-carrier transmission with single carrier transmission according to the service rate of UE request, this moment, a current carrier wave that is in state of activation can be selected in the base station in the available carrier wave set for its configuration, and on this carrier wave, sending DRX MAC CE shown in Fig. 8 A, the length of DRX MAC CE is 0byte.
After step 3:UE received this DRX MAC CE, then the available carrier wave set for its configuration { all entered Short DRX cycle on all CC that CC1, CC2, CC3, CC4, CC5} comprised in the base station.
Step 4:UE carries out channel-monitoring according to Short DRX cycle on carrier wave CC1, CC2, CC3, CC4, CC5.
All service ending of step 5:UE, in order to economize on electricity, need allow all CC enter Long DRX cycle, then the base station can gather that { select a carrier wave to send DRX MAC CE shown in Fig. 8 B CC1, CC2, CC3, CC4, the CC5}, the length of DRX MAC CE is 0byte from available carrier wave.
Step 6:UE receives this DRX MAC CE, and then { all CC enter Long DRX cycle among CC1, CC2, CC3, CC4, the CC5} in the available carrier wave set.
Embodiment two:
In the present embodiment, DRX MAC CE at available carrier wave set { one or more CC among CC1, CC2, CC3, CC4, the CC5} does not consider the DRX optimization mechanism, does not promptly consider to carry out the carrier wave ON/OFF according to traffic carrying capacity.
Step 1:UE begins to have set up a VOIP business, because data volume is smaller, only utilizes CC3 to carry out channel-monitoring according to Short DRX cycle, and other carrier wave is in Long DRX cycle.
Step 2: when UE converses, need file in download, produce bursty data, at this moment single carrier can not satisfy transmission demand, carrier wave number and the carrier index that needs use need be determined according to the business demand of UE in the base station, use carrier wave 1,4 such as needs, this moment, the base station can be in the DRX MAC CE of moment transmission shown in Fig. 8 C of Active time state at CC3.
Step 3:UE will enter Short DRX cycle after receiving this DRX MAC CE on CC1, CC4, keep original DRX cycle constant on CC2, CC3, CC5.
Step 4:UE carries out channel-monitoring according to the DRX cycle that step 3 is determined on each CC.
Step 5: through after a while, the UE downloading service finishes, and in order to economize on electricity, need allow CC1, CC4 enter Long DRX cycle, and then the base station need send the DRX MAC CE shown in Fig. 8 D.
Step 6:UE will enter Long DRXcycle after receiving this DRX MAC CE on CC1, CC4, keep original DRX cycle constant on CC2, CC3, CC5.
Embodiment three:
In the present embodiment, { one or more CC among CC1, CC2, CC3, CC4, the CC5} considers the DRX optimization mechanism to a DRX MAC CE, promptly considers to carry out the carrier wave ON/OFF according to the traffic carrying capacity of UE at the available carrier wave set.
Step 1:UE begins to have set up a VOIP business, because data volume is smaller, only utilizes CC3 to carry out channel-monitoring according to Short DRX cycle, and other carrier wave is in closed condition;
Step 2: when UE converses, need file in download, produce bursty data, at this moment single carrier can not satisfy transmission demand, the carrier wave number of needs use and the carrier index that needs are opened need be determined according to the service rate of UE request in the base station, open carrier wave 1,4 such as needs, this moment, the base station need send the DRX MAC CE shown in Fig. 8 E on CC3, utilize the 1st bit of DRX MAC CE subheader, be that carrier switch is controlled in the R territory, 0 expression does not possess the carrier switch ability, and 1 expression possesses the carrier switch ability.
Step 3:UE will open carrier wave CC1, CC4 after receiving this DRX MAC CE, and enter Short DRX cycle on these two carrier waves, and the DRX state is constant on CC3, the last maintained switch state of CC2, CC5.
Step 4:UE carries out channel-monitoring according to the DRX cycle of configuration on CC1, CC3, CC4.
Step 5: through after a while, the UE downloading service finishes, in order to economize on electricity, need close CC1, CC4, then the base station need send the DRX MAC CE shown in Fig. 8 F, utilizes the 1st bit of DRX MAC CEsubheader, and promptly carrier switch is controlled in the R territory, 0 expression does not possess the carrier switch ability, and 1 expression possesses the carrier switch ability.
Step 6:UE will close carrier wave CC1, CC4 after receiving this DRX MAC CE, and the DRX state is constant on CC3, the last maintained switch state of CC2, CC5.
Referring to Fig. 9, the embodiment of the invention also provides a kind of multi-carrier communications systems, and this system comprises:
Described base station 90 also is used for: be a plurality of member carrier selected part member carriers of described terminal configuration, and the identification information of the member carrier chosen is carried among the described DRX MAC CE;
Accordingly, described terminal 91 is used for: choose the member carrier of the sign correspondence of described member carrier at a plurality of member carriers of self supporting, and on this member carrier according to described DRX CYCLE monitoring control channel.
Described base station 90 also is used for: will represent that the information that described DRX MAC CE possesses the carrier switch ability is carried at described DRX MAC CE;
Accordingly, described terminal 91 also is used for: on the member carrier of choosing according to described DRX CYCLE monitoring control channel before, described part or all of member carrier is opened.
Described base station 90 also is used for: DRX MAC CE is sent to described terminal, carry the information that this DRX MAC CE of expression possesses the carrier switch ability among this DRX MAC CE;
Accordingly, described terminal 91 also is used for: after receiving the DRX MAC CE of base station transmission, described part or all of member carrier is closed.
Referring to Figure 10, the embodiment of the invention also provides a kind of base station, can be applied in the multi-carrier communications systems, and this base station comprises:
Send carrier wave and choose unit 101, be used for choosing the current member carrier that is in state of activation from a plurality of member carriers of terminal support;
DRX cycle carries unit 102, is used for discontinuous receiving cycle (DRX CYCLE) information is carried at the discontinuous reception control cell (DRX MAC CE) of media access control layer;
Described DRX cycle carries unit 102 and is used for: described DRX CYCLE information is carried at the MAC head of described DRX MAC CE or the DRX MAC CE after the expansion.Concrete, described DRX CYCLE information is carried in the R territory, reservation territory of described MAC head or described DRX MAC CE.
This base station also comprises:
Carrier identification is carried unit 104, be used for for a plurality of member carrier selected part member carriers of described terminal configuration, and the identification information of the member carrier chosen is carried among the described DRX MAC CE, with indicate described terminal on the member carrier of the sign correspondence of described member carrier according to described DRX CYCLE monitoring control channel.
Described carrier identification is carried unit 104 and is used for: the identification information of the member carrier chosen is carried in the MAC head or the DRX MAC CE after the expansion of described DRX MAC CE.Concrete, the identification information of the member carrier chosen is carried in the logical channel number LCID territory of described MAC head, or the member carrier of the DRX MAC CE after the described expansion is indicated in the territory.
This base station also comprises:
Carrier switch carries unit 105, is used for the information that the described DRX MAC CE of expression possesses the carrier switch ability is carried at described DRX MAC CE, to indicate described terminal described part or all of member carrier is opened.
Described carrier switch carries unit 105 and also is used for: DRX MAC CE is sent to described terminal, carry the information that this DRX MAC CE of expression possesses the carrier switch ability among this DRX MAC CE, to indicate described terminal described part or all of member carrier is closed.
Described carrier switch carries unit 105 and is used for: will represent that the information that described DRX MAC CE possesses the carrier switch ability is carried in the MAC head or the DRX MACCE after the expansion of described DRX MAC CE.
Referring to Figure 11, the embodiment of the invention also provides a kind of terminal, can be applied in the multi-carrier communications systems, and this terminal comprises:
Channel-monitoring unit 112 is used at a plurality of member carrier selected parts of self supporting or whole member carriers, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
Described channel-monitoring unit 112 is used for: when described DRX MAC CE also carries the identification information of member carrier, in a plurality of member carriers that self supports, choose the member carrier of the sign correspondence of described member carrier, and on this member carrier according to described DRX CYCLE monitoring control channel; Perhaps, in a plurality of member carriers that self supports, choose the member carrier that receives described DRX MAC CE, and on this member carrier according to described DRX CYCLE monitoring control channel.
Described channel-monitoring unit 112 also is used for: also carry the described DRX MAC CE of expression when possessing the information of carrier switch ability at described DRX MAC CE, on the described part or all of member carrier according to described DRX CYCLE monitoring control channel before, described part or all of member carrier is opened.
Described cell receiving element 111 also is used for: receive DRX MAC CE, carry the information that this DRX MAC CE of expression possesses the carrier switch ability among this DRX MAC CE;
Accordingly, described channel-monitoring unit 112 also is used for: described part or all of member carrier is closed.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides, the current member carrier that is in state of activation is chosen in the base station from a plurality of member carriers of terminal support, DRX CYCLE information is carried among the DRX MAC CE, and utilize the member carrier choose that DRX MAC CE is sent to terminal, on the part or all of member carrier of terminal in a plurality of member carriers of self supporting according to described DRX CYCLE monitoring control channel. Therefore which kind of DRX CYCLE monitoring control channel is terminal can determine certain or certain several member carriers according to according to the indication of base station, and then realized supporting in the LTE-A system that the terminal of many member carriers adopts DRX mechanism to carry out the monitoring of control channel.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention. Like this, if of the present invention these are revised and modification belongs to the range of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (26)
1. the discontinuous receiving method in the multicarrier system is characterized in that this method comprises:
The current member carrier that is in state of activation is chosen in the base station from a plurality of member carriers of terminal support;
The base station is carried at discontinuous receiving cycle DRX CYCLE information among the discontinuous reception control cell DRX MAC CE of media access control layer;
The base station utilizes described member carrier that described DRX MAC CE is sent to described terminal, notifying described terminal selected part or whole member carriers in a plurality of member carriers that self supports, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
2. the method for claim 1 is characterized in that, described base station is carried at DRX CYCLE information among the DRX MAC CE and comprises:
Described base station is carried at described DRX CYCLE information in the MAC head or the DRX MAC CE after the expansion of described DRX MAC CE.
3. method as claimed in claim 2 is characterized in that, described base station is carried at described DRX CYCLE information in the R territory, reservation territory of described MAC head, or is carried in the R territory, reservation territory of the DRX MACCE after the described expansion.
4. as arbitrary described method among the claim 1-3, it is characterized in that utilize before described member carrier sends to described terminal with described DRX MAC CE in the base station, this method further comprises:
Described base station is the selected part member carrier in a plurality of member carriers that are described terminal configuration, and the identification information of the member carrier chosen is carried among the described DRX MAC CE;
Described terminal in a plurality of member carriers that self supports selected part or all member carrier comprise:
Described terminal is chosen the member carrier of the sign correspondence of described member carrier in a plurality of member carriers of self supporting.
5. method as claimed in claim 4 is characterized in that, described identification information with the member carrier chosen is carried among the described DRX MAC CE and comprises:
Described base station is carried at the identification information of the member carrier chosen in the MAC head or the DRX MAC CE after the expansion of described DRX MAC CE.
6. method as claimed in claim 5 is characterized in that, described base station is carried at the identification information of the member carrier chosen in the logical channel number LCID territory of described MAC header field, or in the member carrier of the DRX MAC CE after the described expansion indication territory.
7. as arbitrary described method among the claim 1-3, it is characterized in that, described terminal in a plurality of member carriers that self supports selected part or all member carrier comprise:
Described terminal is chosen the member carrier that receives described DRX MAC CE in a plurality of member carriers of self supporting.
8. as arbitrary described method among the claim 1-3, it is characterized in that utilize before described member carrier sends to described terminal with described DRX MAC CE in the base station, this method further comprises:
Described base station will represent that the information that described DRX MAC CE possesses the carrier switch ability is carried among the described DRX MAC CE;
The base station utilize described member carrier described DRX MAC CE is sent to described terminal after and on the member carrier chosen of terminal according to described DRX CYCLE monitoring control channel before, this method further comprises:
Described terminal is opened described part or all of member carrier.
9. method as claimed in claim 8 is characterized in that, utilizes after described member carrier sends to described terminal with described DRX MAC CE in the base station, and this method further comprises:
Described base station sends to described terminal with DRX MAC CE, carries the information that this DRX MAC CE of expression possesses the carrier switch ability among this DRX MAC CE;
Described terminal after receiving described DRX MAC CE is closed described part or all of member carrier.
10. method as claimed in claim 8 is characterized in that, described base station will be represented information that whether described DRXMAC CE possesses the carrier switch ability is carried among the described DRX MAC CE and comprise:
Described base station will represent that the information that described DRX MAC CE possesses the carrier switch ability is carried in the MAC head or the DRX MAC CE after the expansion of described DRX MAC CE.
11., it is characterized in that described DRX CYCLE information comprises as arbitrary described method among claim 1-3,5-6, the 9-10:
Short discontinuous receiving cycle SHORT DRX CYCLE or long discontinuous receiving cycle LONG DRX CYCLE.
12. a multi-carrier communications systems is characterized in that, this system comprises:
The base station is used for choosing the current member carrier that is in state of activation from a plurality of member carriers of terminal support; Discontinuous receiving cycle DRX CYCLE information is carried among the discontinuous reception control cell DRX MAC CE of media access control layer; Utilize described member carrier that described DRX MAC CE is sent to described terminal;
Terminal, be used to receive described DRX MAC CE after, selected part or whole member carriers in a plurality of member carriers that self supports, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
13. system as claimed in claim 12 is characterized in that, described base station also is used for:
Selected part member carrier in a plurality of member carriers that are described terminal configuration, and the identification information of the member carrier chosen is carried among the described DRX MAC CE;
Described terminal is used for:
In a plurality of member carriers that self supports, choose the member carrier of the sign correspondence of described member carrier, and on this member carrier according to described DRX CYCLE monitoring control channel.
14. a base station is characterized in that, this base station comprises:
Send carrier wave and choose the unit, be used for choosing the current member carrier that is in state of activation from a plurality of member carriers of terminal support;
DRX cycle carries the unit, is used for discontinuous receiving cycle DRX CYCLE information is carried at the discontinuous reception control cell DRX MAC CE of media access control layer;
The cell transmitting element, the member carrier that is used to utilize described transmission carrier wave to choose unit selection sends to described terminal with described DRX MAC CE, notifying described terminal selected part or whole member carriers in a plurality of member carriers that self supports, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
15. base station as claimed in claim 14 is characterized in that, described DRX cycle carries the unit and is used for:
Described DRX CYCLE information is carried in the MAC head or the DRX MAC CE after the expansion of described DRX MAC CE.
16. base station as claimed in claim 15 is characterized in that, described DRX cycle carries the unit and is used for:
Described DRX CYCLE information is carried in the R territory, reservation territory of described MAC head, or is carried in the R territory, reservation territory of the DRX MAC CE after the described expansion.
17., it is characterized in that this base station also comprises as arbitrary described base station among the claim 14-16:
Carrier identification is carried the unit, be used for for a plurality of member carrier selected part member carriers of described terminal configuration, and the identification information of the member carrier chosen is carried among the described DRX MAC CE, with indicate described terminal on the member carrier of the sign correspondence of described member carrier according to described DRX CYCLE monitoring control channel.
18. base station as claimed in claim 17 is characterized in that, described carrier identification is carried the unit and is used for:
The identification information of the member carrier chosen is carried in the MAC head or the DRX MAC CE after the expansion of described DRX MAC CE.
19. base station as claimed in claim 18 is characterized in that, described carrier identification is carried the unit and is used for:
The identification information of the member carrier chosen is carried in the logical channel number LCID territory of described MAC head, or in the member carrier of the DRX MAC CE after the described expansion indication territory.
20., it is characterized in that this base station also comprises as arbitrary described base station among the claim 14-16:
Carrier switch carries the unit, is used for the information that the described DRX MAC CE of expression possesses the carrier switch ability is carried at described DRX MAC CE, to indicate described terminal described part or all of member carrier is opened.
21. base station as claimed in claim 20 is characterized in that, described carrier switch carries the unit and also is used for:
DRX MAC CE is sent to described terminal, carry the information that this DRXMAC CE of expression possesses the carrier switch ability among this DRX MAC CE, described part or all of member carrier is closed to indicate described terminal.
22. base station as claimed in claim 20 is characterized in that, described carrier switch carries the unit and is used for:
The information that the described DRX MAC CE of expression is possessed the carrier switch ability is carried in the MAC head or the DRX MAC CE after the expansion of described DRX MAC CE.
23. a terminal is characterized in that, this terminal comprises:
The cell receiving element, cell DRX MAC CE is controlled in the discontinuous reception that is used for the media access control layer that send the reception base station on member carrier, carries discontinuous receiving cycle DRXCYCLE information among this DRX MAC CE;
The channel-monitoring unit is used at a plurality of member carrier selected parts of self supporting or whole member carriers, and on the member carrier of choosing according to described DRX CYCLE monitoring control channel.
24. terminal as claimed in claim 23 is characterized in that, described channel-monitoring unit is used for:
When in described DRX MAC CE, also carrying the identification information of member carrier, in a plurality of member carriers that self supports, choose the member carrier of the sign correspondence of described member carrier, and on this member carrier according to described DRX CYCLE monitoring control channel; Perhaps,
In a plurality of member carriers that self supports, choose the member carrier that receives described DRX MAC CE, and on this member carrier according to described DRX CYCLE monitoring control channel.
25., it is characterized in that described channel-monitoring unit also is used for as claim 23 or 24 described terminals:
In described DRX MAC CE, also carry the described DRX MAC CE of expression when possessing the information of carrier switch ability, on the member carrier of choosing according to described DRX CYCLE monitoring control channel before, described part or all of member carrier is opened.
26. terminal as claimed in claim 25 is characterized in that, described cell receiving element also is used for:
Receive DRX MAC CE, carry the information that this DRX MAC CE of expression possesses the carrier switch ability among this DRX MAC CE;
Described channel-monitoring unit also is used for:
Described part or all of member carrier is closed.
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| CN104684050A (en) * | 2013-11-26 | 2015-06-03 | 中国移动通信集团公司 | Discontinuous reception (DRX) control method and equipment |
| WO2016127955A1 (en) * | 2015-02-15 | 2016-08-18 | 中兴通讯股份有限公司 | Discontinuous reception method, wireless access network node and terminal |
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| US8488521B2 (en) * | 2008-03-14 | 2013-07-16 | Interdigital Patent Holdings, Inc. | Behavior for wireless transmit/receive unit and MAC control elements for LTE DRX operations |
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| WO2016127955A1 (en) * | 2015-02-15 | 2016-08-18 | 中兴通讯股份有限公司 | Discontinuous reception method, wireless access network node and terminal |
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