Summary of the invention
The embodiment of the invention provides a kind of method of scheduling mobile terminal to transmit ascending signal channel detection pilot frequency, and Apparatus and system is in order to improve utilization rate of time-frequency resources in the long evolving system.
Embodiment of the invention technical scheme is as follows,
A kind of method of scheduling mobile terminal to transmit ascending signal channel detection pilot frequency comprises:
Obtain the idling-resource in each Transmission Time Interval, described idling-resource comprises the running time-frequency resource that is not used for transmit ascending data;
The period that sends upstream data according to each portable terminal in follow-up Transmission Time Interval is distributed the period resource that sends ascending channel detecting pilot frequency for each portable terminal, and be that portable terminal distributes the corresponding resource of frequency range according to the information quality relevant information of each portable terminal on described idling-resource, and indicating mobile terminal sends ascending channel detecting pilot frequency on the idling-resource that distributes.
According to said method:
When described each portable terminal is selected, carry out following operation:
Obtain the final updating time of the channel quality information of each portable terminal on described idling-resource and the gap length of current time, and preferentially select the portable terminal of described gap length maximum; Or/and
Determine the Transmission Time Interval of described idling-resource ownership, and preferentially be chosen in the portable terminal that sends upstream data in the follow-up Transmission Time Interval.
When distributing the corresponding resource of frequency range for portable terminal, obtain the final updating time of described portable terminal channel quality information on each unit frequency range in described idling-resource and the gap length of current time, and described gap length is distributed to this portable terminal greater than the resource of frequency range of setting threshold.
When indicating each moving terminal on the idling-resource that distributes, to send ascending channel detecting pilot frequency, physical channel by transmitting the uplink data scheduling instruction is to each mobile terminal to transmit ascending signal channel detection pilot frequency dispatch command, and this ascending channel detecting pilot frequency dispatch command comprises the positional information of the idling-resource that each portable terminal obtains.
The positional information of described idling-resource comprises the period information of described idling-resource or/and band information.
When a plurality of portable terminals sent ascending channel detecting pilot frequency on similar frequency bands, described a plurality of portable terminals sent ascending channel detecting pilot frequency according to designated time intervals on the different periods of similar frequency bands; Perhaps, described a plurality of portable terminal adopts multiplex mode to send ascending channel detecting pilot frequency simultaneously on the same period of similar frequency bands.
The channel quality information of each portable terminal on the idling-resource that distributes is that the ascending channel detecting pilot frequency according to this mobile terminal reporting upgrades.
In the transmission cycle that comprises two Transmission Time Intervals at least, each portable terminal adopts multiplex mode to send ascending channel detecting pilot frequency simultaneously on the same period of frequency band.
A kind of communicator comprises:
Memory cell is used to store the channel quality relevant information of each portable terminal on frequency band;
Resource allocation unit, be used for obtaining the idling-resource of each Transmission Time Interval, the period that sends upstream data according to each portable terminal in follow-up Transmission Time Interval is distributed the period resource that sends ascending channel detecting pilot frequency for each portable terminal, and be to meet the portable terminal of setting quantity to distribute the corresponding resource of frequency range according to the information quality relevant information of each portable terminal on described idling-resource, described idling-resource comprises the running time-frequency resource that is not used for transmit ascending data;
Communication unit is used to indicate each portable terminal to send ascending channel detecting pilot frequency on the idling-resource that distributes separately.
Described communicator also comprises scheduling processing unit, is used for according to the ascending channel detecting pilot frequency that portable terminal sends the idling-resource that transmits this ascending channel detecting pilot frequency being carried out channel quality assessment; And the channel quality information of described portable terminal on this idling-resource upgraded according to assessment result.
A kind of communication system comprises evolution base station and at least one portable terminal; Wherein,
Described evolution base station is used for obtaining the idling-resource of each Transmission Time Interval, the period that sends upstream data according to each portable terminal is distributed the period resource that sends ascending channel detecting pilot frequency for each portable terminal, and be to meet the portable terminal of setting quantity to distribute the corresponding resource of frequency range according to the information quality relevant information of each portable terminal on described idling-resource, and indicating mobile terminal sends ascending channel detecting pilot frequency on the idling-resource that distributes, and described idling-resource comprises the running time-frequency resource that is not used for transmit ascending data;
Described portable terminal is used for sending ascending channel detecting pilot frequency to this evolution base station according to the indication of described evolution base station on the idling-resource that distributes.
In the embodiment of the invention, evolution base station is distributed to each portable terminal in the system with the idling-resource in each Transmission Time Interval, and indicates each portable terminal to send ascending channel detecting pilot frequency on the idling-resource that distributes.Like this, evolution base station does not just need to mark off fixing running time-frequency resource with the transmission ascending channel detecting pilot frequency, thereby the running time-frequency resource in the system is obtained an equitable breakdown, and then has improved the utilization rate of time-frequency resources in each Transmission Time Interval.
Embodiment
For the running time-frequency resource in Long Term Evolution (LTE) system is obtained an equitable breakdown, and then improve the utilization rate of time-frequency resources in each Transmission Time Interval (TTI).In the embodiment of the invention, evolution base station in the LTE system (Evoluted Node B, eNB) idling-resource in each Transmission Time Interval is distributed to each portable terminal (UE), and indicate each UE on the idling-resource that obtains, the ascending channel detecting pilot frequency (CS pilot tone) of self to be sent to eNB, and receive the CS pilot tone of each UE transmission and carry out corresponding subsequent processing; Wherein, described idling-resource comprises the running time-frequency resource that is not used for transmit ascending data in the LTE system.
Below in conjunction with accompanying drawing the preferred embodiment of the invention is elaborated.
Consult shown in Fig. 2 A, in a specific embodiment, the LTE system comprises eNB20 and at least one UE21.Described eNB20 is used for obtaining the idling-resource of each TTn, and indication UE21 transmission CS pilot tone on the idling-resource that distributes, and described idling-resource comprises the running time-frequency resource that is not used for transmit ascending data; Described UE21 is used for sending CS pilot tone to eNB20 according to the indication of eNB20 on the idling-resource that distributes.
Consult shown in Fig. 2 B, in a specific embodiment, described eNB20 comprises memory cell 200, resource allocation unit 201, communication unit 202 and scheduling processing unit 203.
Described memory cell 200 is used to store the channel quality information tabulation (CQI tabulation) of each UE21.The content of CQI tabulation is as shown in table 1:
Table 1
In actual applications, eNB20 consults shown in the table 1 for each UE with uplink service in this eNB20 registration safeguards a CQI tabulation, and the contents in table of CQI tabulation comprises Resource Unit index, channel quality information q and temporal information t, wherein:
The Resource Unit index comprises the identification information of all per channel resources in the W frequency band, consults shown in Fig. 2 C, and in each TTI, the W frequency band is divided into m equal portions, and its identification information is respectively 1,2......m, and each equal portions is called a per channel resource;
Channel quality information has write down the quality relevant information of each per channel resource in the W frequency band, and eNB20 is that UE selects suitable channel resource to send upstream data according to this information; The CS pilot tone that UE of the every reception of eNB20 sends will be upgraded the channel quality information of corresponding per channel resource in the CQI tabulation of this UE according to the result of channel quality assessment;
Temporal information t has write down current time and the last gap length that upgrades corresponding channel quality information respectively.
Described resource allocation unit 201 is used for obtaining the idling-resource of each Transmission Time Interval, and distributes described idling-resource for each UE21; When having a plurality of UE21 in the LTE system, resource allocation unit is tabulated according to the channel quality information of each UE21 and is determined the priority of each UE21, and is followed successively by each UE21 distribution idling-resource according to priority order from high to low.
Described communication unit is used to indicate UE21 to send ascending channel detecting pilot frequency on the idling-resource that distributes separately, and receives the ascending channel detecting pilot frequency that each UE21 sends to eNB20.
Described scheduling processing unit 203 is used for respectively corresponding idling-resource being carried out channel quality assessment according to the CS pilot tone that each UE21 sends; And according to assessment result to the corresponding renewal of UE21 channel quality information tabulation separately carrying out;
Based on the system architecture shown in Fig. 2 A, in the present embodiment, eNB no longer is the fixing running time-frequency resource of CS pilot frequency distribution, but utilizes the idling-resource that is not used in transmit ascending data among each TTI to realize the transmission of CS pilot tone, can utilize the running time-frequency resource in the system more fully.
Consult an embodiment shown in Fig. 3 A, in the W frequency band, oblique line partly is depicted as eNB20 and distributes to the running time-frequency resource that each UE is used for transmit ascending data, and vertical line is partly distributed to the running time-frequency resource that each UE is used to transmit the CS pilot tone for eNB20.The gap of each UE between transmit ascending data, to eNB20 transmission CS pilot tone, eNB20 does not need to mark off the transmission that fixing running time-frequency resource carries out the CS pilot tone for UE.For any idling-resource, eNB20 can distribute to the transmission that at least one UE carries out the CS pilot tone.
Be that example is elaborated with four UE (comprising UE1, UE2, UE3 and UE4) below.
As shown in Figure 3A, eNB20 is that UE2 distributes certain running time-frequency resource transmit ascending data at TTI n, and while eNB20 distributes to a plurality of UE with idling-resource and is used to transmit the CS pilot tone, for example UE1, UE2 and UE3.Resource distribution mode among the TTI n, normally in certain Transmission Time Interval before TTI n (for example, TTI n-1, TTI n-2, TTI n-3......) distributed and indicated to each UE by the resource allocation indication information, for example, eNB20 distributes the resource among the TTI n in TTI n-1 and the resource allocation indication information is sent to each UE, comprises UE1, UE2 and UE3.Each UE uploads data or CS pilot tone respectively on eNB20 distributes to oneself corresponding running time-frequency resource in TTI n.
ENB20 carries out reasonable distribution with reference to the channel quality information of each UE to idling-resource usually, is that four UE distribution running time-frequency resources are that example describes simultaneously with eNB20 below.
Shown in Fig. 3 B, be assigned as example with the idling-resource among the TTIn, idiographic flow is as follows:
Step S300:eNB20 obtains the CQI tabulation of UE1, UE2, UE3 and UE4, and in follow-up TTI (for example TTIn+1, TTIn+2......), send period of upstream data according to each UE, be that described four UE distribute the period resource that sends the CS pilot tone in TTIn;
CQI tabulation separately is chosen in the UE that sends the CS pilot tone on the idling-resource among the TTI n to step S301:eNB20 according to UE1, UE2, UE3 and UE4.
In each TTI, permission is limited by the quantity that idling-resource sends the UE of CS pilot tone, can be one, two, three ..., in the present embodiment, be that example describes with " three ".Owing to there are four different UE in the current LTE system, therefore, eNB20 need select the UE that sends the CS pilot tone, and when selecting UE, eNB20 can abide by following principle:
First kind of principle: preferentially select in the CQI tabulation corresponding to the bigger UE of the t of the idling-resource among the TTI n.When carrying out first kind of principle, the eNB20 corresponding channel quality information in the CQI tabulation of each UE that can upgrade in time, thus improved the confidence level of the CQI tabulation of each UE.
For example: it is 20 that the idling-resource among the TTI n has comprised the Resource Unit index, 21......35 these 15 per channel resources, eNB20 is at UE1 so, UE2, the t that obtains these 15 per channel resource correspondences in UE3 and the UE4 CQI tabulation separately respectively (comprises t20, t21......t35), and with the t20 in every CQI tabulation, t21......t35 carries out addition respectively and obtains total time information T and (comprise T1, T2, T3 and T4), then, eNB20 is to T1, T2, the size of T3 and T4 compares, the result is: T1>T3>T2>T4, be " three " owing to limit to a number or amount, so as shown in Figure 3A, eNB20 selects UE1 according to comparative result, UE2 and UE3 transmit the CS pilot tone in idling-resource.
Second kind of principle: preferential selection will be in the follow-up period of TTI n (for example, TTI n+1, TTIn+2......) send the UE of upstream data.When carrying out described second kind of principle, the eNB20 corresponding channel quality information in the CQI tabulation of the UE that will be in follow-up TTI sends upstream data that can upgrade in time, like this, eNB20 just can distribute the running time-frequency resource that sends upstream data according to the tabulation of the CQI after upgrading for corresponding UE, thereby guaranteed the transmission of uplink data quality, guaranteed that also eNB20 carries out the performance of scheduling controlling to UE.
In actual applications, eNB20 can only carry out first kind of principle or only carry out second kind of principle and select UE when selecting UE, also can carry out two kinds of principles simultaneously and select UE, when selecting UE according to two kinds of principles simultaneously, then can set corresponding execution priority as if eNB20.Certainly, under some situation, eNB20 can not be subjected to the restriction of any principle, and preferential selection has the UE of urgency traffic or has the UE of VIP business.
Step S320:eNB20 distributes the resource of frequency range that sends the CS pilot tone for selected UE in the idling-resource of TTIn.
With UE2 is example, consult and mark in the TTI n among Fig. 3 A shown in the vertical line part that " UE2 " arranged, eNB20 is when distributing idling-resource to UE2, CQI tabulation according to UE2, the preferential idling-resource and the t that belong among the TTI n of selecting carries out the transmission of CS pilot tone greater than the per channel resource allocation of setting threshold (for example, 100ms, 200ms......) to UE2.
On the other hand, in the embodiment of the invention, when a plurality of UE send the CS pilot tone by the idling-resource among each TTI, eNB20 can indicate a plurality of UE to pass through to adopt frequency division multiplexing (Frequency-division multiplexing on the same period of same frequency range, FDM) mode or code division multiplexing (Code Division Multiplexing, CDM) mode sends self CS pilot tone; For example, consult shown in the vertical line part that marks " UE3/UE1 " among Fig. 3 A in the TTIn, in TTI n, UE3 and UE1 send the CS pilot tone in the same period of same channel to eNB20.Perhaps,
ENB20 also can adopt time division multiplexing, and (Time-Division Multiplexing, TDM) mode indicate described a plurality of UE to send the CS pilot tone of self in the different periods of similar frequency bands according to the time interval of setting (comprising zero interval and non-zero gap).For example, consult among Fig. 3 A in the TTI n+1 and TTI n+2 the vertical line of mark " UE2 " and " UE1 " partly shown in, in TTI n+1, UE2 successively sends the CS pilot tone to eNB20 with UE1 continuously in the different periods of similar frequency bands, and in TTI n+2, UE1 sends CS pilot tone at the different periods priority certain interval of times of similar frequency bands to eNB20 with UE2.
The use that yet can mutually combine of above-mentioned FDM mode, CDM mode and TDM mode does not repeat them here.
Step S330:eNB20 is sent to selected UE1, UE2 and UE3 with corresponding dispatch command, indicates the positional information of its idling-resource that obtains separately to described three UE, and described positional information comprises the period information and/or the band information of idling-resource.
Step S340:UE1, UE2 and UE3 are according to the identification information in the dispatch command (for example, UE ID) obtains the positional information of the idling-resource that is assigned to separately in the respective field of dispatch command, and self CS pilot tone is sent to eNB20 by the idling-resource that obtains.
The CS pilot tone that eNB20 sends separately according to UE1, UE2 and UE3 is carried out channel quality assessment at corresponding UE to the idling-resource that transmits described three kinds of pilot tones respectively, calculate the CQI information of described three UE on corresponding idling-resource, and the partial parameters in " channel quality information q " and " temporal information t " these two list items in described three UE CQI tabulation is separately carried out corresponding renewal.
According to the description of the foregoing description, eNB20 also receives the CS pilot tone that selected a plurality of UE send by same method in Transmission Time Intervals such as TTI n+1, TTI n+1.......
In order in time to obtain each UE channel quality information on all per channel resources in the W frequency band, eNB20 need with a plurality of Transmission Time Intervals be the cycle (for example, 1*TTI, 2*TTI, 3*TTI......), take all factors into consideration the CS pilot transmission situation of each UE in one-period.For example, consult shown in Fig. 3 A, eNB20 is one-period (TTI n, TTI n+1 and TTI n+2) with 3*TTI, in this cycle, the running time-frequency resource of the CS pilot tone that transmission UE1 sends has comprised all per channel resources in the W frequency band, therefore, the situation that eNB20 takes all factors into consideration UE1 transmission CS pilot tone in this cycle promptly can obtain the channel quality information of interior all the per channel resources of W frequency band at UE1, thereby be that eNB20 (for example, TTI n+3, TTI n+4......) in follow-up TTI carries out scheduling controlling to UE1 reliable foundation is provided.In like manner, the eNB20 situation that sends the CS pilot tone according to UE2 and UE3 in the described cycle can obtain in the W frequency band all per channel resources equally at the channel quality information of UE1 and UE3.
On the basis of the foregoing description, certain a part of running time-frequency resource is taken for a long time by upstream data in the W frequency band, can also adopt another kind of execution mode.
Consult shown in Figure 4ly, in a specific embodiment, eNB20 is one-period with 4*TTI, and the CS pilot tone of multiplex modes transmission UE1, UE2, UE3 and UE4 transmission is adopted in the position, end of first TTI in each cycle by whole W frequency bands; Simultaneously, the CS pilot tone that sends by the selected UE of idling-resource transmission among eNB20 other three TTI in each cycle, like this, eNB20 just can regularly obtain the CQI information of all per channel resources in the W frequency band, thereby the UE that sends upstream data in the system is carried out efficient scheduling control.Certainly, eNB20 also can be in each cycle first place/centre period/position, end of the 4th TTI of the 3rd TTI/ of second TTI/ adopt the CS pilot tone of transmitting described four UE in the same way, what present embodiment was described is preferred implementation, does not repeat them here.
On the other hand, in the embodiment of the invention, employed dispatch command (hereinafter referred to as CS pilot tone dispatch command) had also adopted new signaling format when the selected UE of eNB20 indication sent the CS pilot tone.
In the prior art, employed dispatch command when eNB20 indication UE sends upstream data (hereinafter referred to as the uplink data scheduling instruction) is based on the control signaling of physical layer, has specific signaling format, therefore, if the signaling format of CS pilot tone dispatch command is set to described information specific form, so, eNB20 also can send CS pilot tone dispatch command by the uplink data scheduling channel, so just do not need both to have simplified the setting of channel for the scheduling of CS pilot tone is provided with special-purpose channel; Simultaneously, utilize physical layer signaling to finish the scheduling of up CS pilot tone, can guarantee the real-time of up CS pilot tone scheduling, make eNB20 can in time obtain effective uplink signal-channel quality information, thereby UE is carried out efficient scheduling control.
Under the prior art, the uplink data scheduling instruction that eNB20 sends has its intrinsic signaling format, consults shown in the table 2, and existing uplink data scheduling instruction comprises UE ID, the indication of data dispatch resource and these three parts of other information.Wherein, " UE ID " is used for the UE of unique identification eNB20 current scheduling; " indication of data dispatch resource " is used to identify the relevant information (as TTI numbering, frequency range etc.) of the running time-frequency resource of distributing to current scheduling UE; Needed relevant information when " other information " is used to write down UE transmission upstream data.
Table 2
UE?ID |
The indication of data dispatch resource |
Other information |
Based on above-mentioned signaling format, to consult shown in the table 3, the embodiment of the invention has increased " indication territory " part in existing uplink data scheduling instruction, formed new signaling format, and wherein, " UE ID " is used for the UE of unique identification eNB20 current scheduling; " indication territory " is used to identify the character of the dispatch command that eNB20 sends, and in the present embodiment, the numerical value in indication territory is 1 o'clock, and what expression eNB20 sent is the data dispatch instruction, is 0 o'clock, and what expression eNB20 sent is CS pilot tone dispatch command; " data/CS pilot tone scheduling resource indication " are used to write down the positional information that eNB20 distributes to the running time-frequency resource of current scheduling UE, this positional information comprise described running time-frequency resource the time segment identification or/and the frequency range sign.If the numerical value in indication territory is 1, then described running time-frequency resource is used to transmit the upstream data that UE sends, if the numerical value in indication territory is 0, then described running time-frequency resource is used to transmit the CS pilot tone that UE sends; " other information " is used to write down UE and sends upstream data/needed relevant information of CS pilot tone.In another kind of embodiment, the position of " UE ID " and " indication territory " also can be changed mutually, does not repeat them here.
Table 3
UE?ID |
The indication territory |
Data/CS pilot tone scheduling resource indication |
Other information |
In the present embodiment, the length in " indication territory " can be set at 1 bit, therefore, the dispatch command that adopts above-mentioned two kinds of signaling formats respectively on length much at one, eNB20 just can send CS pilot tone dispatch command by the physical channel that sends the uplink data scheduling instruction like this, be that eNB20 sends the dispatch command that has adopted the signaling format shown in the table 3 on described physical channel, it is uplink data scheduling instruction or CS pilot tone dispatch command that UE discerns this dispatch command by the value of indication territory part in this dispatch command.
In the embodiment of the invention, eNB20 distributes to each UE in the system with the idling-resource among each TTI, and indicates each UE to send the CS pilot tone on the idling-resource that distributes.Like this, eNB20 does not just need to mark off fixing running time-frequency resource with transmission CS pilot tone, thereby the running time-frequency resource in the system is obtained an equitable breakdown, and then has improved the utilization rate of time-frequency resources among each TTI.
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 within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.