CN102281638B - Method and equipment for scheduling slot - Google Patents
Method and equipment for scheduling slot Download PDFInfo
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- CN102281638B CN102281638B CN201110220100.1A CN201110220100A CN102281638B CN 102281638 B CN102281638 B CN 102281638B CN 201110220100 A CN201110220100 A CN 201110220100A CN 102281638 B CN102281638 B CN 102281638B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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Abstract
The embodiment of the invention relates to the wireless communication technology field, especially to a method and equipment for scheduling a slot. In the prior art, with regard to dynamic configuration of a time division duplex (TDD) slot, a current CSI measuring mechanism can not reflect interference changes, so that degradation of the system performance is easy to be caused; however, the above-mentioned problem can be solved according to the invention. The method provided in the embodiment of the invention comprises the following steps that: network side equipment divides slots in a wireless frame into a plurality of sets according to a transmission direction of a slot that needs to be scheduled and slot configuration information of a strong interference cell that is adjacent to an object cell; the network side equipment selects slots respectively from each the slot set and carried out configuration on UE according to the selected slots; and the network side equipment obtains CSIs corresponding to the selected slots and schedules all slots in sets that the corresponding slots belong to according the CSIs. According to the embodiment of the invention, for the dynamic configuration of the TDD slot, an interference change can be reflected, so that the system performance and a CSI measuring accuracy are improved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of method and apparatus of dispatching subframe.
Background technology
The basic duplex mode adopting for cellular system, TDD (Time division duplex, time division duplex) pattern refers to that uplink downlink uses same working band, on the different time intervals, carry out the transmission of uplink and downlink signals, between up-downgoing, there is protection interval (Guard Period, GP); FDD (Frequency division duplex; Frequency Division Duplexing (FDD)) pattern refers to that uplink downlink uses different working bands; can when same, be engraved in the transmission of carrying out uplink and downlink signals on different frequency carriers; between up-downgoing, there is protection bandwidth (Guard Band, GB).
The frame structure of LTE (Long Term Evolution, Long Term Evolution) TDD system is slightly more complex, and as shown in Figure 1, a radio frames length is 10ms, comprises special subframe and conventional subframe two classes totally 10 subframes, and each subframe is 1ms.Special subframe is divided into 3 subframe: DwPTS (Downlink Pilot Slot, descending pilot frequency subframe) for transmitting PSS (Primary Synchronization Signal, master sync signal), PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel), PHICH (Physical HARQ Indication Channel, physical mixed automatic repeat request indicating channel), PCFICH (Physical Control Format Indication Channel, Physical Control Format Indicator Channel), PDSCH (Physical Downlink Shared Channel, physical down link sharing channel) etc., GP is for the protection interval between descending and up), UpPTS (Uplink Pilot Slot, ascending pilot frequency subframe) for transmitting SRS (Sounding Reference Signal, detection reference signal), PRACH (Physical Random Access Channel, Physical Random Access Channel) etc.Conventional subframe comprises sub-frame of uplink and descending sub frame, for transmitting uplink/downlink control channel and business datum etc.Wherein, in a radio frames, can configure two special subframes (being positioned at subframe 1 and 6), also can configure a special subframe (being positioned at subframe 1).DwPTS subframe in subframe 0 and subframe 5 and special subframe is always as downlink transfer, and the UpPTS subframe in subframe 2 and special subframe is always for uplink, and other subframes can be configured to as uplink or downlink transfer according to needs.
In TDD system, uplink and downlink transmission is used identical frequency resource, in different subframes, transmits uplink/downlink signals.In common TDD system, comprise TD-SCDMA (TD SDMA) system of 3G and the TD-LTE system of 4G, the division of uplink and downlink subframe is static or semi-static, and common way is determine ascending-descending subframes ratio cut partition and remain unchanged according to cell type and business proportion roughly in network planning process.This is comparatively simple way under the background of the large covering of macrocell, and also comparatively effective.And along with technical development, increasing Microcell (Pico cell), the low power base station such as Home eNodeB (Home NodeB) are deployed for local little covering is provided, in Zhe Lei community, number of users is less, and customer service changes in demand is larger, there is situation about dynamically changing in the up-downgoing business proportion demand of community therefore.
In real system, if different communities is provided with different ascending-descending subframes configurations, can cause the cross time-slot of neighbor cell to disturb.As shown in Figure 1B, macrocell is sending on the time slot of downstream signal, femto cell (Femto cell) receives for upward signal, Ze Liang occurs between community: base-station, base-station disturbs, femto base station directly receives the downstream signal of Macro base station, to have a strong impact on the quality that femto base station receives L-UE (Local UE, local UE) upward signal.
The neighbor cell here can be the community (shown in Figure 1B) of the geographically adjacent same TDD carrier wave of use, or geographically overlapping or use the community (shown in Fig. 1 C) of adjacent TDD carrier wave.
For the method for static or semi-static configuration TDD subframe, owing to determining that according to cell type and business proportion roughly uplink and downlink timeslot ratio divides and remain unchanged in network planning process, each base station uplink and downlink timeslot configuration is consistent, so for each descending sub frame, what it was suffered is all the descending interference of adjacent base station, disturb relatively constant, so can be at certain CSI (Channel State Information, channel condition information) upgrade in report cycle, select some descending sub frames wherein carry out CSI measurement and report.
And for the method for dynamic-configuration TDD subframe, the uplink and downlink timeslot configuration of each community may be different.Taking certain community as example: it is likely the descending interference of adjacent base station in the suffered interference of each descending sub frame, also be likely the uplink interference of the UE under adjacent base station, may cause the disturbance fluctuation of each descending sub frame larger, so current CSI measurement mechanism can not reflect the variation of interference, thereby easily cause system performance degradation.
In sum, for dynamic-configuration TDD subframe, current CSI measurement mechanism can not reflect the variation of interference, thereby easily causes system performance degradation.
Summary of the invention
A kind of method and apparatus of dispatching subframe that the embodiment of the present invention provides, in order to solve in prior art, exist for dynamic-configuration TDD subframe, current CSI measurement mechanism can not reflect the variation of interference, thereby easily causes the problem of system performance degradation.
A kind of method of dispatching subframe that the embodiment of the present invention provides, comprising:
The subframe configuration information of the subframe transmission direction that network equipment is dispatched as required and the strong jamming community adjacent with Target cell, subframe in a radio frames is divided into multiple set, wherein said radio frames comprises variable subframe and/or fixing subframe, variable subframe is the variable subframe of transmission direction, and fixing subframe is the changeless subframe of transmission direction;
Described network equipment is selected subframe respectively from each subframe set, and according to the subframe of selecting, subscriber equipment is configured;
Described network equipment obtains the channel condition information CSI corresponding to subframe of selection, and according to described CSI, all subframes in the set under corresponding subframe is dispatched.
A kind of network equipment of dispatching subframe that the embodiment of the present invention provides, comprising:
Divide module, for the subframe transmission direction of scheduling and the subframe configuration information of the strong jamming community adjacent with Target cell as required, subframe in a radio frames is divided into multiple set, wherein said radio frames comprises variable subframe and/or fixing subframe, variable subframe is the variable subframe of transmission direction, and fixing subframe is the changeless subframe of transmission direction;
Configuration module, for selecting subframe from each subframe set respectively, and is configured subscriber equipment according to the subframe of selecting;
Scheduler module, for obtaining the CSI corresponding to subframe of selection, and according to described CSI, dispatches all subframes in the set under corresponding subframe.
The subframe configuration information of the subframe transmission direction of dispatching as required due to the embodiment of the present invention and the strong jamming community adjacent with Target cell, subframe in a radio frames is divided into multiple set, and the CSI corresponding according to the subframe of obtaining selection, all subframes in set under corresponding subframe are dispatched, thereby for dynamic-configuration TDD subframe, can reflect the variation of interference, improve systematic function and CSI and measured accuracy rate.
Brief description of the drawings
Fig. 1 is TD-LTE system frame structure schematic diagram;
Figure 1B is that while using identical TDD carrier wave, cross time-slot disturbs schematic diagram;
Fig. 1 C is that while using adjacent TDD carrier wave, cross time-slot disturbs schematic diagram;
Fig. 2 is the method flow schematic diagram of embodiment of the present invention scheduling subframe;
Fig. 3 is the network equipment structural representation of embodiment of the present invention scheduling subframe.
Embodiment
The subframe configuration information of the subframe transmission direction that embodiment of the present invention network equipment is dispatched as required and the strong jamming community adjacent with Target cell, subframe in a radio frames is divided into multiple set, then from each subframe set, select subframe respectively, and according to the subframe of selecting, subscriber equipment is configured, and the CSI corresponding according to the subframe of obtaining selection, all subframes in set under corresponding subframe are dispatched, wherein radio frames comprises variable subframe and/or fixing subframe, variable subframe is the variable subframe of transmission direction, fixing subframe is the changeless subframe of transmission direction.The subframe configuration information of the subframe transmission direction of dispatching as required due to the embodiment of the present invention and the strong jamming community adjacent with Target cell, subframe in a radio frames is divided into multiple set, and the CSI corresponding according to the subframe of obtaining selection, all subframes in set under corresponding subframe are dispatched, thereby for dynamic-configuration TDD subframe, can reflect the variation of interference, improve systematic function and CSI and measured accuracy rate.
Wherein, the embodiment of the present invention can be applied to (such as TD-LTE system) in TDD system, also can be applied to other needs in the dynamic system of adjusting subframe uplink-downlink configuration, for example TD-SCDMA system and follow-up evolution system thereof, WiMAX (Worldwide Interoperability for Microwave Access, micro-wave access global inter communication) system and follow-up evolution system thereof etc.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Figure 2, the method for embodiment of the present invention scheduling subframe comprises the following steps:
The subframe configuration information of the subframe transmission direction that step 201, network equipment are dispatched as required and the strong jamming community adjacent with Target cell, subframe in a radio frames is divided into multiple set, wherein radio frames comprises variable subframe and/or fixing subframe, variable subframe is the variable subframe of transmission direction, and fixing subframe is the changeless subframe of transmission direction;
Step 202, network equipment are selected subframe respectively from each subframe set, and according to the subframe of selecting, subscriber equipment are configured;
Step 203, network equipment obtain the CSI corresponding to subframe of selection, and according to CSI, all subframes in the set under corresponding subframe are dispatched.
Radio frames comprises that variable subframe and/or fixing subframe represent three kinds of situations.1, the subframe in radio frames is variable subframe entirely; 2, the subframe in radio frames is fixing subframe entirely; 3, the subframe in radio frames has variable subframe and fixing subframe.
Preferably, whether network equipment can be strong jamming community according to a kind of judgement community adjacent with Target cell in following manner:
(1) network equipment is according to the signal strength signal intensity of the community adjacent with Target cell detecting, judge whether the community adjacent with Target cell is strong jamming community, such as signal strength signal intensity and threshold value are compared, if be greater than threshold value, think that this community is strong jamming community;
(2) network equipment basis belongs to the cell ID corresponding to generation strong jamming community of the user equipment to report of Target cell, judge whether the community adjacent with Target cell is strong jamming community, such as signal strength signal intensity that can the regulation subscriber equipment pair community adjacent with Target cell detects, if signal strength signal intensity is greater than threshold value, report the cell ID of this community, corresponding network equipment is being received after cell ID using corresponding community as strong jamming community;
(3) network equipment is being received after the announcement information that the community adjacent with Target cell sends, determine that this community is the strong jamming community adjacent with Target cell, wherein announcement information is that signal strength signal intensity that the community adjacent with Target cell sends according to the Target cell of receiving determines it self is to send behind the strong jamming community of Target cell, such as the signal of interfered cell can be measured in adjacent area, if path loss is less, think the strong jamming community of own Shi Gai community, then by this community of signaling of network interface.
It should be noted that, the embodiment of the present invention is not limited to above-mentioned 3 kinds of modes, and other can judge whether the community adjacent with Target cell is the same embodiment of the present invention that is suitable for of mode of strong jamming community.
Preferably, network equipment can be notified the subframe configuration information that obtains the strong jamming community adjacent with Target cell by interface signaling, also can independently detect the subframe configuration information that obtains the strong jamming community adjacent with Target cell.Certainly, other modes that can obtain subframe configuration information are also suitable for the embodiment of the present invention, such as informing network side apparatus after being obtained by subscriber equipment.
Preferably, in step 202, network equipment can adopt the one in following manner to select subframe:
The subframe of chooser frame number minimum from set;
From set, select arbitrarily a subframe;
From subframe set, select in turn subframe each measuring period, in each measuring period, select 1 subframe to measure, but alternately selects the different subframes in subframe set to measure within continuous multiple measuring periods, thereby can reduce variance.
It should be noted that, the embodiment of the present invention is not limited to above-mentioned 3 kinds of modes, and other can select the mode of subframe to be suitable for equally the embodiment of the present invention from set.
In force, it may be up needing the subframe transmission direction of scheduling, may be also descending, is introduced respectively below.
Situation one, the subframe that need to dispatch are descending sub frames.
Preferably, in step 201, network equipment is descending by transmission direction in Target cell or the fixing subframe that contains descending pilot frequency time slot is divided in the first set, and is that descending variable sub-frame division is at least one set by transmission direction in Target cell.
Such as in 7 kinds of sub-frame configuration of TDD, all descending sub frames in a radio frames are divided into two classes, one class is the changeless subframe of neighbor cell configuration direction, another kind of is that (subframe is numbered a subframe numbering in radio frames to the neighbor cell configuration direction subframe that may change here, be N={0,1,2 ... 9}):
The changeless subframe of neighbor cell configuration direction, for example subframe 0,1,2,5,6 in each radio frames, wherein subframe 0,1,5,6 are fixed as descending sub frame (or the subframe that contains descending pilot frequency time slot), and subframe 2 is fixed as sub-frame of uplink.For in subframe 0,1,5,6 these 4 descending sub frames, disturbing due to adjacent area is all the descending interference from base station, can think that base station is substantially equal in the suffered interference of these subframes, so by descending sub frame 0,1,5,6 composition the first set, as a CSI measuring assembly; And then be during descending variable sub-frame division is gathered at least one by transmission direction in Target cell, for example subframe 3,4,7,8 in each radio frames, the 9th, variable subframe, by subframe 3,4,7,8, the 9 set numbers of dividing are not more than subframe 3,4, are the number of descending sub frame in 7,8,9.
Preferably, network equipment can be divided into variable subframe the variable subframe of two classes, the variable subframe of the first kind is that transmission direction is all descending variable subframe in strong jamming community, and the variable subframe of Equations of The Second Kind is that transmission direction is up variable subframe in part or all of strong jamming community.
Then, network equipment by variable first kind sub-frame division in the first set; And during variable Equations of The Second Kind sub-frame division is gathered at least one, the variable subframe of the Equations of The Second Kind transmission direction in each strong jamming community in the each set after wherein dividing is identical.
Concrete, if all adjacent areas are all identical with Target cell in the direction of current subframe, be all descending, this subframe and subframe 0,1,5,6 can be classified as to same descending sub frame set, for example become the first set;
If there are one or more adjacent areas different from Target cell in current subframe direction, can draw multiple interference radiating way combination, the subframe with same disturbance directional combination is placed in same subframe set, obtain at least one set.
Hypothetical target community is sub-frame configuration 5; Have 2 strong jamming adjacent areas, time slot configuration is respectively configuration 1 and configuration 2.As shown in table 1:
| Subframe sequence number | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Target cell | D | S | U | D | D | D | D | D | D | D |
| Interfered cell 1 | D | S | U | U | D | D | S | U | U | D |
| Interfered cell 2 | D | S | U | D | D | D | S | U | D | D |
Table 1
Subframe 0,1,5,6th, in Target cell, transmission direction is descending or the fixing subframe that contains descending pilot frequency time slot;
Subframe 3,4,7,8,9th, in Target cell, transmission direction is descending variable subframe, subframe 9 transmission direction in community 1 and community 2 is all descending, so the subframe 9 variable subframe that is first kind is put into subframe 9 in the first set, the first set just comprises subframe 0,1,5,6,9.
Subframe 3,4,7,8th, in part or all of strong jamming community, transmission direction is up variable subframe, the transmission direction combination of corresponding community 1 and community 2 is respectively: (U, D), (D, D), (U, U), (U, D).
Because subframe 3 and subframe 8 are all (U, D) in the transmission direction combination of community 1 and community 2, so subframe 3 and subframe 8 are divided in a set, subframe 4 is divided in a set, subframe 7 is divided in a set.
Measure accuracy rate in order further to have improved systematic function and CSI, preferably, network equipment can also be adjusted the set after dividing.
Concrete, between step 201 and step 202, can further include:
Step S1, network equipment select respectively a sub-frame configuration carry out CSI measurement and report to subscriber equipment from each set;
Step S2, network equipment are adjusted according to the subframe in the measurement result pair set of receiving.
Accordingly, in step 202, network equipment is selected subframe in the each subframe set from adjusting respectively.
In force, in step S1, network equipment selects the mode of subframe and network equipment in step 202 to select the mode of subframe identical, does not repeat them here.
Preferably, network equipment can further divide into groups to adjust to subframe according to the result judgement of CSI feedback.In step S1, initial configuration UE is in each subframe set within each self adaptation cycle for network equipment, and each optional subframe is carried out CSI measurement and reported; In step S2, network equipment can be adjudicated according to measurement result, thereby determines that descending sub frame CSI measures grouping.Concrete corresponding decision threshold can be arranged by agreement, or obtains by the means such as emulation, actual measurement.
Preferably, CSI comprises channel quality indicator (CQI) (Channel Quality Indicator, channel quality instruction) information; In step S2, network equipment is after CQI information corresponding to the subframe that obtains each selection, if have multiple CQI information at same MCS (Modulation and Coding Scheme, modulation coding mode) within the scope of signal to noise ratio corresponding to grade, subframe corresponding to multiple CQI information adjusted in same set.
For example, for CQI, can inquire about the LI(link interface) curve that link simulation provides, select, within the scope of signal to noise ratio corresponding to same MCS grade, these two CQI to be included in same subframe set if the value of two CQI falls into.
For example, for sub-frame of uplink, the interference (or interference plus noise) that can record according to network equipment, level is gathered division to subframe, if the interference size that two subframes record all falls within the scope of given interference strength, these two subframes are included in same subframe set, the subframe that interference level differs larger is classified as in different subframe set, wherein interference strength scope can be arranged by agreement, or obtains by the means such as emulation, actual measurement.
Preferably, in step 202, network equipment configure user equipment carries out CSI measurement and reports the subframe of each selection; Accordingly, in step 203, network equipment receives the CSI corresponding to subframe of the selection of user equipment to report, and according to the CSI receiving, all subframes in the set under corresponding subframe is dispatched.
Concrete, in step 202, network equipment configure user equipment carries out CSI and measures feedback in one or more descending sub frame set, for each descending sub frame set configuration CSI feedback parameter (such as feedback cycle, subframe position etc.) independently separately; Subscriber equipment, according to the parameter configuration of network equipment, carries out separately independently CSI and measures and feedback in one or more set.
In force, in the time that the CSI for multiple set need to be measured and feed back to subscriber equipment, network equipment need to ensure that the measurement of each set and feedback do not conflict mutually in resource.
Preferably, in step 203, network equipment obtains one or more CSI values of feedback, corresponding to one or more descending sub frame set (subframe that comprises descending sub frame and/or contain special time slot).Network equipment with obtain CSI value be used for the descending sub frame of corresponding descending sub frame set is dispatched, according to the reported result of subscriber equipment to this user equipment allocation resource, between subscriber equipment, be separate.
Situation two, the subframe that need to dispatch are sub-frame of uplink.
Preferably, in step 201, network equipment is that up fixing subframe is divided in the second set by transmission direction in Target cell, and is during up variable sub-frame division is gathered at least one by transmission direction in Target cell.
Such as in 7 kinds of sub-frame configuration of TDD, all sub-frame of uplink in a radio frames are divided into two classes, one class is the changeless subframe of neighbor cell configuration direction, another kind of is that (subframe is numbered a subframe numbering in radio frames to the neighbor cell configuration direction subframe that may change here, be N={0,1,2 ... 9}):
The changeless subframe of neighbor cell configuration direction, for example subframe 0,1,2,5,6 in each radio frames, wherein subframe 0,1,5,6 are fixed as descending sub frame (or the subframe that contains descending pilot frequency time slot), and subframe 2 is fixed as sub-frame of uplink.For in subframe 0,1,5,6 these 4 descending sub frames, disturbing due to adjacent area is all the uplink interference from base station, can think that base station is substantially equal in the suffered interference of these subframes, so sub-frame of uplink 2 is formed to the first set, as a CSI measuring assembly; And then be during up variable sub-frame division is gathered at least one by transmission direction in Target cell, for example subframe 3,4,7,8 in each radio frames, the 9th, variable subframe, by subframe 3,4,7,8, the 9 set numbers of dividing are not more than subframe 3,4, are the number of sub-frame of uplink in 7,8,9.
Preferably, network equipment can be divided into variable subframe the variable subframe of two classes, the variable subframe of the 3rd class is that transmission direction is all up variable subframe in strong jamming community, and the variable subframe of the 4th class is that transmission direction is descending variable subframe in part or all of strong jamming community.
Then, network equipment by the variable sub-frame division of the 3rd class in the second set; And during the variable sub-frame division of the 4th class is gathered at least one, the variable subframe of the 4th class transmission direction in each strong jamming community in the each set after wherein dividing is identical.
Concrete, if all adjacent areas are all identical with Target cell in the direction of current subframe, be all up, this subframe and subframe 2 can be classified as to same descending sub frame set, for example become the second set;
If there are one or more adjacent areas different from Target cell in current subframe direction, can draw multiple interference radiating way combination, the subframe with same disturbance directional combination is placed in same subframe set, obtain at least one set.
Hypothetical target community is sub-frame configuration 6; Have 2 strong jamming adjacent areas, time slot configuration is respectively configuration 1 and configuration 2.As shown in table 2:
| Subframe sequence number | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Target BS | D | S | U | U | U | D | S | U | U | D |
| Interfered cell 1 | D | S | U | U | D | D | S | U | U | D |
| Interfered cell 2 | D | S | U | D | D | D | S | U | D | D |
Table 2
Subframe 2 is that transmission direction is up fixing subframe in Target cell;
Subframe 3,4,7, the 8th, in Target cell, transmission direction is up variable subframe, and subframe 7 transmission direction in community 1 and community 2 is all up, so the subframe 7 variable subframe that is first kind, subframe 7 is put in the second set, and the second set just comprises subframe 2,7.
Subframe 3,4,8th, in part or all of strong jamming community, transmission direction is descending variable subframe, the transmission direction combination of corresponding community 1 and community 2 is respectively: (U, D), (D, D), (U, D).
Because subframe 3 and subframe 8 are all (U, D) in the transmission direction combination of community 1 and community 2, so subframe 3 and subframe 8 are divided in a set, subframe 4 is divided in a set.
Measure accuracy rate in order further to have improved systematic function and CSI, preferably, network equipment can also be adjusted the set after dividing.
Concrete, between step 201 and step 202, can further include:
Steps A 1, network equipment select respectively a sub-frame configuration to carry out upward signal transmission (such as configure user equipment sends SRS (Sounding Reference Signal, detection reference signal)) to subscriber equipment from each set;
Steps A 2, network equipment carry out CSI measurement according to the upward signal of receiving, and adjust according to the subframe in measurement result pair set.
Accordingly, in step 202, network equipment is selected subframe in the each subframe set from adjusting respectively.
In force, in steps A 1, network equipment selects the mode of subframe and network equipment in step 202 to select the mode of subframe identical, does not repeat them here.
Preferably, network equipment can further divide into groups to adjust to subframe according to the result judgement of CSI feedback.In steps A 1, initial configuration UE is in each subframe set within each self adaptation cycle for network equipment, and each optional subframe sends upward signal; In steps A 2, network equipment can carry out CSI measurement according to the upward signal of receiving, adjudicates, thereby determine that descending sub frame CSI measures grouping according to measurement result.Concrete corresponding decision threshold can be arranged by agreement, or obtains by the means such as emulation, actual measurement.
Preferably, CSI comprises channel quality indicator CQI information; In steps A 2, network equipment, after CQI information corresponding to the subframe that obtains each selection, if having multiple CQI information within the scope of signal to noise ratio corresponding to same MCS grade, is adjusted to subframe corresponding to multiple CQI information in same set.
For example, for CQI, can inquire about the LI(link interface) curve that link simulation provides, select, within the scope of signal to noise ratio corresponding to same MCS grade, these two CQI to be included in same subframe set if the value of two CQI falls into.
Preferably, in step 202, network equipment configure user equipment sends upward signal (such as configure user equipment sends SRS) by the subframe of each selection; Accordingly, in step 203, network equipment carries out CSI measurement according to the upward signal of the subscriber equipment of receiving, obtains the CSI corresponding to subframe of selection, and according to the CSI receiving, all subframes in the set under corresponding subframe is dispatched.
Concrete, in step 202, network equipment configure user equipment sends upward signal in one or more sub-frame of uplink set, for each sub-frame of uplink set configuration parameter independently separately; Subscriber equipment, according to the parameter configuration of network equipment, sends upward signal on the sub-frame of uplink in one or more set.
Preferably, in step 203, network equipment obtains one or more CSI values of feedback, corresponding to one or more sub-frame of uplink set.Network equipment with obtain CSI value be used for the sub-frame of uplink of corresponding sub-frame of uplink set is dispatched, according to the reported result of subscriber equipment to this user equipment allocation resource, between subscriber equipment, be separate.
In force, if network equipment is known strong jamming cell change or sub-frame configuration and is changed (such as detecting according to autonomous, the modes such as the signaling of network interface are obtained), can be to as above grouping and the configuration of CSI measurement and feedback subframe are upgraded.
Wherein, the network equipment of the embodiment of the present invention can be base station (such as macro base station, Home eNodeB etc.), can be also RN (relaying) equipment, can also be other network equipment.
Lift two examples below, situation one and situation two are described.
Situation one: taking table 1 as example, base station is sub-frame configuration 5; Have 2 strong jamming adjacent areas, time slot configuration is respectively configuration 1 and configuration 2.Concrete steps are as follows:
1, subframe 0,1,5,6 composition subframe set 0 (i.e. the first set) are divided in base station; Subframe 3,4,7,8,9 interference radiating way combination is respectively: (U, D), (D, D), (U, U), (U, D), (D, D), subframe 4 and subframe 9 are grouped into subframe set 0; Subframe 3 and subframe 8 form subframe set 1, and subframe 7 forms subframe set 2.
2, configure user equipment in base station is measured and reports at the descending sub frame of descending sub frame set neutron frame number minimum: in subframe set 0, select subframe 0 to carry out CQI measurement and report, obtain CQI
0, in subframe set 1, select subframe 3 to carry out CQI measurement and report, obtain CQI
1, in subframe set 2, select subframe 7 to carry out CQI measurement and report, obtain CQI
2.
3, the LI(link interface) curve that inquiry link simulation in base station provides, to adjusting as upper set, is supposed CQI
0and CQI
2value fall into and select, within the scope of signal to noise ratio corresponding to same descending MCS grade, subframe set corresponding these two CQI to be merged, subframe 7 is grouped into subframe set 0; Final 9 descending sub frames are divided into 2 subframe set: subframe 0, Isosorbide-5-Nitrae, 5,6,7,9 composition subframe set 0, subframe 3,8 composition subframe set 1.
4, configure user equipment in base station is selected subframe 0 to carry out CQI measurement to report, obtain CQI in subframe set 0
0, in subframe set 1, select subframe 3 to carry out CQI measurement and report, obtain CQI
1.
5, base station CQI
0value is dispatched all subframes in subframe set 0, uses CQI
1value is dispatched all subframes in subframe set 1.
Situation two: taking table 2 as example, base station is sub-frame configuration 6; Have 2 strong jamming adjacent areas, time slot configuration is respectively configuration 1 and configuration 2.Concrete steps are as follows:
1, division subframe 2 in base station forms subframe set 0 (i.e. the second set); Subframe 3,4,7,8 interference radiating way combination is respectively: (U, D), (D, D), (U, U), and (U, D), subframe 7 is grouped into subframe set 0; Subframe 3 and subframe 8 form subframe set 1, and subframe 4 forms subframe set 2.
2, base station scheduling subscriber equipment is numbered and in minimum subframe, is sent upward signal (being assumed to be SRS) in each sub-frame of uplink set, for measuring the up CSI in each sub-frame of uplink set: subframe set 0 selects subframe 2 to send SRS, measures CQI
0, in subframe set 1, select subframe 3 to send SRS, measure CQI
1, in subframe set 2, select subframe 4 to send SRS, measure CQI
2.
3, LI(link interface) curve that link simulation provides can be inquired about to adjusting as upper set in base station, supposes CQI
0and CQI
2value fall into and select, within the scope of signal to noise ratio corresponding to same up MCS grade, subframe set corresponding these two CQI to be merged, subframe 4 is grouped into subframe set 0; Final 5 sub-frame of uplink are divided into 2 subframe set: subframe 2,4,7 composition subframe set 0, subframe 3,8 composition subframe set 1.
4, configure user equipment in base station selects subframe 2 to send SRS in subframe set 0, measures CQI
0, in subframe set 1, select subframe 3 to send SRS, measure CQI
1.
5, base station CQI
0value is dispatched all subframes in subframe set 0, uses CQI
1value is dispatched all subframes in subframe set 1.
Based on same inventive concept, a kind of network equipment of dispatching subframe is also provided in the embodiment of the present invention, because the principle that this equipment is dealt with problems is similar to the method for scheduling subframe, therefore the enforcement of this equipment can be referring to the enforcement of method, repeats part and repeat no more.
As shown in Figure 3, the network equipment of embodiment of the present invention scheduling subframe comprises: divide module 30, configuration module 31 and scheduler module 32.
Divide module 30, for the subframe transmission direction of scheduling and the subframe configuration information of the strong jamming community adjacent with Target cell as required, subframe in a radio frames is divided into multiple set, wherein radio frames comprises variable subframe and/or fixing subframe, variable subframe is the variable subframe of transmission direction, and fixing subframe is the changeless subframe of transmission direction;
Configuration module 31, for selecting subframe from each subframe set respectively, and is configured subscriber equipment according to the subframe of selecting;
Scheduler module 32, for obtaining the channel condition information CSI corresponding to subframe of selection, and according to CSI, dispatches all subframes in the set under corresponding subframe.
Preferably, needing the subframe of scheduling is descending sub frame; Dividing module 30 is descending by transmission direction in Target cell or the fixing subframe that contains descending pilot frequency time slot is divided in the first set, and is that descending variable sub-frame division is at least one set by transmission direction in Target cell.
Preferably, division module 30 is by variable first kind sub-frame division in the first set, and wherein the variable subframe of the first kind is that transmission direction is all descending variable subframe in strong jamming community; And during variable Equations of The Second Kind sub-frame division is gathered at least one, wherein the variable subframe of Equations of The Second Kind is that transmission direction is up variable subframe in part or all of strong jamming community, and the transmission direction in each strong jamming community of the variable subframe of Equations of The Second Kind in the each set after division is identical.
Preferably, divide module 30 selects respectively a sub-frame configuration carry out CSI measurement and report to subscriber equipment from each set; Adjust according to the subframe in the measurement result pair set of receiving;
Accordingly, configuration module 31 is selected subframe in the each subframe set from adjusting respectively.
Preferably, configuration module 31 configure user equipment carry out CSI measurement and report the subframe of each selection;
Accordingly, scheduler module 32 receives the CSI corresponding to subframe of the selection of user equipment to report.
Preferably, needing the subframe of scheduling is sub-frame of uplink; Dividing module 30 is that up fixing subframe is divided in the second set by transmission direction in Target cell, and is during up variable sub-frame division is gathered at least one by transmission direction in Target cell.
Preferably, division module 30 is by the variable sub-frame division of the 3rd class in the first set, and wherein the variable subframe of the 3rd class is that transmission direction is all up variable subframe in strong jamming community; And during the variable sub-frame division of the 4th class is gathered at least one, wherein the variable subframe of the 4th class is that transmission direction is descending variable subframe in part or all of strong jamming community, and the variable subframe of the 4th class transmission direction in each strong jamming community in the each set after division is identical.
Preferably, divide module 30 selects respectively a sub-frame configuration to carry out upward signal transmission to subscriber equipment from each set; Carry out CSI measurement according to the upward signal of receiving, and adjust according to the subframe in measurement result pair set;
Accordingly, configuration module 31 is selected subframe in the each subframe set from adjusting respectively.
Preferably, configuration module 31 configure user equipment send upward signal by the subframe of each selection;
Accordingly, scheduler module 32 is carried out CSI measurement according to the upward signal of the subscriber equipment of receiving, obtains CSI corresponding to subframe selecting.
Preferably, CSI comprises channel quality indicator CQI information; Divide module 30 after CQI information corresponding to the subframe that obtains each selection, if having multiple CQI information within the scope of signal to noise ratio corresponding to same MCS grade, subframe corresponding to multiple CQI information adjusted in same set.
Preferably, dividing module 30 adopts the one in following manner to select subframe:
The subframe of chooser frame number minimum from set;
From set, select arbitrarily a subframe;
From subframe set, select in turn subframe each measuring period.
Whether preferably, divide module 30 is strong jamming community according to a kind of judgement community adjacent with Target cell in following manner:
According to the signal strength signal intensity of the community adjacent with Target cell detecting, judge whether the community adjacent with Target cell is strong jamming community;
According to the cell ID corresponding to generation strong jamming community of user equipment to report that belongs to Target cell, judge whether the community adjacent with Target cell is strong jamming community;
Receiving after the announcement information that the community adjacent with Target cell sends, determine that this community is the strong jamming community adjacent with Target cell, wherein announcement information is that signal strength signal intensity that the community adjacent with Target cell sends according to the Target cell of receiving determines it self is to send behind the strong jamming community of Target cell.
Wherein, the network equipment of the embodiment of the present invention can be base station (such as macro base station, Home eNodeB etc.), can be also RN (relaying) equipment, can also be other network equipment.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and amendment to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the amendment of the scope of the invention.
The subframe configuration information of the subframe transmission direction of dispatching as required due to the embodiment of the present invention and the strong jamming community adjacent with Target cell, subframe in a radio frames is divided into multiple set, and the CSI corresponding according to the subframe of obtaining selection, all subframes in set under corresponding subframe are dispatched, thereby for dynamic-configuration TDD subframe, can reflect the variation of interference, improve systematic function and CSI and measured accuracy rate.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (20)
1. a method of dispatching subframe, is characterized in that, the method comprises:
The subframe configuration information of the subframe transmission direction that network equipment is dispatched as required and the strong jamming community adjacent with Target cell, subframe in a radio frames is divided into multiple set, wherein said radio frames comprises variable subframe and/or fixing subframe, variable subframe is the variable subframe of transmission direction, and fixing subframe is the changeless subframe of transmission direction;
Described network equipment is selected subframe respectively from each subframe set, and according to the subframe of selecting, subscriber equipment is configured;
Described network equipment obtains the channel condition information CSI corresponding to subframe of selection, and according to described CSI, all subframes in the set under corresponding subframe is dispatched;
Wherein, the described subframe that needs scheduling is descending sub frame or sub-frame of uplink; In the time that the described subframe that need to dispatch is descending sub frame, described network equipment is divided into multiple set by the subframe in a radio frames and comprises: described network equipment is descending by transmission direction in Target cell or the fixing subframe that contains descending pilot frequency time slot is divided in the first set, and is that descending variable sub-frame division is at least one set by transmission direction in Target cell; In the time that the described subframe that need to dispatch is sub-frame of uplink, described network equipment is divided into multiple set by the subframe in a radio frames and comprises: described network equipment is that up fixing subframe is divided in the second set by transmission direction in Target cell, and is during up variable sub-frame division is gathered at least one by transmission direction in Target cell.
2. the method for claim 1, is characterized in that, the described subframe that needs scheduling is descending sub frame;
Described network equipment comprises all variable sub-frame division at least one set: described network equipment is by variable first kind sub-frame division in described the first set, and wherein the variable subframe of the first kind is that transmission direction is all descending variable subframe in strong jamming community; And described network equipment by variable Equations of The Second Kind sub-frame division at least one set in, wherein the variable subframe of Equations of The Second Kind is that transmission direction is up variable subframe in part or all of strong jamming community, and the transmission direction in each strong jamming community of the variable subframe of Equations of The Second Kind in the each set after division is identical.
3. method as claimed in claim 2, is characterized in that, after the subframe in a radio frames is divided into multiple set by described network equipment, selects respectively also to comprise before subframe from each subframe set:
Described network equipment selects respectively a sub-frame configuration carry out CSI measurement and report to subscriber equipment from each set;
Described network equipment is adjusted according to the subframe in the measurement result pair set of receiving;
Described network equipment selects subframe to comprise:
Described network equipment is selected subframe in the each subframe set from adjusting respectively.
4. method as claimed in claim 2 or claim 3, is characterized in that, described network equipment is configured and comprises:
Described network equipment configure user equipment carries out CSI measurement and reports the subframe of each selection;
CSI corresponding to subframe that described network equipment obtains selection comprises:
Described network equipment receives the CSI corresponding to subframe of the selection of user equipment to report.
5. the method for claim 1, is characterized in that, the described subframe that needs scheduling is sub-frame of uplink;
Described network equipment comprises all variable sub-frame division at least one set: described network equipment is by the variable sub-frame division of the 3rd class in described the first set, and wherein the variable subframe of the 3rd class is that transmission direction is all up variable subframe in strong jamming community; And described network equipment by the variable sub-frame division of the 4th class at least one set in, wherein the variable subframe of the 4th class is that transmission direction is descending variable subframe in part or all of strong jamming community, and the variable subframe of the 4th class transmission direction in each strong jamming community in the each set after division is identical.
6. method as claimed in claim 5, is characterized in that, after the subframe in a radio frames is divided into multiple set by described network equipment, selects respectively also to comprise before subframe from each subframe set:
Described network equipment selects respectively a sub-frame configuration to carry out upward signal transmission to subscriber equipment from each set;
Described network equipment carries out CSI measurement according to the upward signal of receiving, and adjusts according to the subframe in measurement result pair set;
Described network equipment selects subframe to comprise:
Described network equipment is selected subframe in the each subframe set from adjusting respectively.
7. the method as described in claim 5 or 6, is characterized in that, described network equipment is configured and comprises:
Described network equipment configure user equipment sends upward signal by the subframe of each selection;
CSI corresponding to subframe that described network equipment obtains selection comprises:
Described network equipment carries out CSI measurement according to the upward signal of the subscriber equipment of receiving, obtains CSI corresponding to subframe selecting.
8. the method as described in claim 3 or 6, is characterized in that, described CSI comprises channel quality indicator CQI information;
Subframe adjustment in described network equipment pair set comprises:
Described network equipment, after CQI information corresponding to the subframe that obtains each selection, if having multiple CQI information within the scope of signal to noise ratio corresponding to same MCS grade, is adjusted to subframe corresponding to multiple CQI information in same set.
9. the method as described in claim 1,3 or 6, is characterized in that, described network equipment adopts the one in following manner to select subframe:
The subframe of chooser frame number minimum from set;
From set, select arbitrarily a subframe;
From subframe set, select in turn subframe each measuring period.
10. as the method for claim 1～3,5～6 as described in arbitrary, it is characterized in that, whether described network equipment is strong jamming community according to a kind of judgement community adjacent with Target cell in following manner:
Described network equipment, according to the signal strength signal intensity of the community adjacent with Target cell detecting, judges whether the community adjacent with Target cell is strong jamming community;
Described network equipment basis belongs to the cell ID corresponding to generation strong jamming community of the user equipment to report of Target cell, judges whether the community adjacent with Target cell is strong jamming community;
Described network equipment is being received after the announcement information that the community adjacent with Target cell sends, determine that this community is the strong jamming community adjacent with Target cell, wherein said announcement information is that signal strength signal intensity that the community adjacent with Target cell sends according to the Target cell of receiving determines it self is to send behind the strong jamming community of Target cell.
Dispatch the network equipment of subframe for 11. 1 kinds, it is characterized in that, this equipment comprises:
Divide module, for the subframe transmission direction of scheduling and the subframe configuration information of the strong jamming community adjacent with Target cell as required, subframe in a radio frames is divided into multiple set, wherein said radio frames comprises variable subframe and/or fixing subframe, variable subframe is the variable subframe of transmission direction, and fixing subframe is the changeless subframe of transmission direction;
Configuration module, for selecting subframe from each subframe set respectively, and is configured subscriber equipment according to the subframe of selecting;
Scheduler module, for obtaining the CSI corresponding to subframe of selection, and according to described CSI, dispatches all subframes in the set under corresponding subframe;
Wherein, the described subframe that needs scheduling is descending sub frame or sub-frame of uplink; In the time that the described subframe that need to dispatch is descending sub frame, described division module specifically for: be descending by transmission direction in Target cell or the fixing subframe that contains descending pilot frequency time slot is divided in the first set, and be that descending variable sub-frame division is at least one set by transmission direction in Target cell; In the time that the described subframe that need to dispatch is sub-frame of uplink, described division module specifically for: be that up fixing subframe is divided in the second set by transmission direction in Target cell, and be that up variable sub-frame division is at least one set by transmission direction in Target cell.
12. equipment as claimed in claim 11, is characterized in that, the described subframe that needs scheduling is descending sub frame;
Described division module specifically for: by variable first kind sub-frame division to described first set in, wherein the variable subframe of the first kind is that transmission direction is all descending variable subframe in strong jamming community; And during variable Equations of The Second Kind sub-frame division is gathered at least one, wherein the variable subframe of Equations of The Second Kind is that transmission direction is up variable subframe in part or all of strong jamming community, and the transmission direction in each strong jamming community of the variable subframe of Equations of The Second Kind in the each set after division is identical.
13. equipment as claimed in claim 12, is characterized in that, described division module also for:
From each set, select respectively a sub-frame configuration carry out CSI measurement and report to subscriber equipment; Adjust according to the subframe in the measurement result pair set of receiving;
Described configuration module specifically for:
In each subframe set from adjusting, select subframe respectively.
14. equipment as described in claim 12 or 13, is characterized in that, described configuration module specifically for:
Configure user equipment carries out CSI measurement and reports the subframe of each selection;
Described scheduler module specifically for:
Receive the CSI corresponding to subframe of the selection of user equipment to report.
15. equipment as claimed in claim 11, is characterized in that, the described subframe that needs scheduling is sub-frame of uplink;
Described division module specifically for: by the variable sub-frame division of the 3rd class to described first set in, wherein the variable subframe of the 3rd class is that transmission direction is all up variable subframe in strong jamming community; And during the variable sub-frame division of the 4th class is gathered at least one, wherein the variable subframe of the 4th class is that transmission direction is descending variable subframe in part or all of strong jamming community, and the variable subframe of the 4th class transmission direction in each strong jamming community in the each set after division is identical.
16. equipment as claimed in claim 15, is characterized in that, described division module also for:
From each set, select respectively a sub-frame configuration to carry out upward signal transmission to subscriber equipment; Carry out CSI measurement according to the upward signal of receiving, and adjust according to the subframe in measurement result pair set;
Described configuration module specifically for:
In each subframe set from adjusting, select subframe respectively.
17. equipment as described in claim 15 or 16, is characterized in that, described configuration module specifically for:
Configure user equipment sends upward signal by the subframe of each selection;
Described scheduler module specifically for:
Carry out CSI measurement according to the upward signal of the subscriber equipment of receiving, obtain CSI corresponding to subframe selecting.
18. equipment as described in claim 13 or 16, is characterized in that, described CSI comprises CQI information;
Described division module also for:
After CQI information corresponding to the subframe that obtains each selection, if having multiple CQI information within the scope of signal to noise ratio corresponding to same MCS grade, subframe corresponding to multiple CQI information adjusted in same set.
19. equipment as described in claim 11,13 or 16, is characterized in that, described division module adopts the one in following manner to select subframe:
The subframe of chooser frame number minimum from set;
From set, select arbitrarily a subframe;
From subframe set, select in turn subframe each measuring period.
20. as the equipment of claim 11～13,15～16 as described in arbitrary, it is characterized in that, whether described division module is strong jamming community according to a kind of judgement community adjacent with Target cell in following manner:
According to the signal strength signal intensity of the community adjacent with Target cell detecting, judge whether the community adjacent with Target cell is strong jamming community;
According to the cell ID corresponding to generation strong jamming community of user equipment to report that belongs to Target cell, judge whether the community adjacent with Target cell is strong jamming community;
Receiving after the announcement information that the community adjacent with Target cell sends, determine that this community is the strong jamming community adjacent with Target cell, wherein said announcement information is that signal strength signal intensity that the community adjacent with Target cell sends according to the Target cell of receiving determines it self is to send behind the strong jamming community of Target cell.
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|---|---|---|---|
| CN201110220100.1A CN102281638B (en) | 2011-08-02 | 2011-08-02 | Method and equipment for scheduling slot |
| PCT/CN2012/078835 WO2013017016A1 (en) | 2011-08-02 | 2012-07-18 | Method and device for scheduling sub-frame |
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| CN201110220100.1A CN102281638B (en) | 2011-08-02 | 2011-08-02 | Method and equipment for scheduling slot |
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