CN101605356B - Method, device and system for indicating resources - Google Patents
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Abstract
The invention discloses a method, a device and a system for indicating resources. The method comprises the following steps: user equipment (UE) monitors a compressed physical downlink control channel (PDCCH) obtained by compressed corresponding downlink control information (DCI); the UE resolves the DCI of the PDCCH to obtain a resource number; and the UE utilizes the preset corresponding relation between resource numbers and resource positions to confirm the corresponding resource position of the obtained resource number. The device comprises a distribution unit, a first notification unit and a channel-compressing unit for a substation and comprises a monitoring unit, a resolving unit and a confirmation unit for a terminal. The invention saves command control equipment (CCE) resources and avoids causing influence on other equipment in a section.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of method, Apparatus and system of indexed resource.
Background technology
Long Term Evolution (LTE, Long Term Evolution) with OFDM (OFDM, Orthogonal Frequency Division Multiplexing) be core, the basic thought of OFDM is high-speed data-flow to be distributed on the subcarrier of a plurality of quadratures transmit, thereby the character rate on the subcarrier is reduced greatly, symbol duration extends greatly, thereby expansion has stronger resistance to time delay, has reduced the influence of intersymbol interference.
Physical downlink control channel PDCCH (Packet Dedicated Control Channel) is by control channel unit (CCE, control channel elements) forms, Downlink Control Information (DCI, downlinkcontrol information) is carried on the CCE, in existing scheme, be designated as the particular location of the resource of UE distribution by the DCI bit.The effect of DCI form and each form is as shown in table 1:
Table 1
| The DCI form | Effect |
| DCI form 0 | Be used for uplink scheduling, the resource allocation and the transformat of indication UL-SCH |
| DCI form | |
| 1 | The descending scheduling that is used for the single antenna port |
| DCI form 1A | The descending scheduling of the single antenna port that is used to compress |
| DCI form 1B | The descending scheduling of single antenna port that is used for the compression of closed loop |
| DCI form 1C | Be used to support paging, RACH response and dynamic dispatching |
| DCI form | |
| 2 | The descending scheduling that is used for downlink closed-loop MIMO is supported the dicode word |
| DCI form 3 | Be used to send TPC order (2bit adjustment) |
| DCI form 3A | Be used to send TPC order (1bit adjustment) |
When using PDCCH, because multiple DCI form is carried on the CCE, promptly be carried on the PDCCH, so at first need 8 kinds of DCI forms correspondences shown in the table 1 are become 4 kinds of forms of PDCCH, 4 kinds of forms of PDCCH are as shown in table 2:
Table 2
| The PDCCH form | The CCE number | The PDCCH number of bits |
| 0 | 1 | 72 |
| 1 | 2 | 144 |
| 2 | 4 | 288 |
| 3 | 8 | 576 |
After the correspondence, for PDCCH, come the indexed resource position by the DCI bit, transmitting terminal is according to the resource location of DCI bit indication, and notice receiving terminal transmitting terminal is the resource location of its distribution, and receiving terminal is according to notifying corresponding resource location to receive data.
The CCE resource of PDCCH is limited, does concrete analysis below.
Because a CCE takies 36 RE, the supposing the system bandwidth is 5M, below the operating position of CCE is analyzed.Under the 5M bandwidth, each OFDM symbol can use 300 RE, if hypothesis has two antennas again, have the 8 groups of automatic request retransmission indicating channel of physical mixed (PHICH, PhysicalHybrid ARQ Indicator Channel), then PHICH takies 24 RE altogether, in addition, Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indicator Channel) takies 16 RE, pilot tone takies 100 RE, and PHICH, PCFICH and pilot tone take 140 RE altogether, and then effective RE of taking of PDCCH is 160 (300-140=160).Because 36 RE form a CCE, so 160 RE can have 4.4 CCE.When more than having obtained 1 OFDM symbol, effective RE number and the CCE number of PDCCH.When under the situation of 2 OFDM symbols, have 600 RE, still use above-mentioned hypothesis, then this moment, the RE number that PDCCH effectively takies is 460, and (300 * 2-140=460) is individual, and the CCE number is 12.78.And the like, be under 3 or 4 s' the situation at the OFDM symbol, all can calculate number and CCE number that PDCCH takies effective RE.Reference table 3, when showing the OFDM symbol and be 1,2,3 and 4, PDCCH takies the number of available RE and the number of CCE.
Table 3
| n＝1 | n＝2 | n＝3 | n＝4 | |
| The effective RE number of PDCCH | 160 | 460 | 760 | 1060 |
| The CCE number | 4.44 | 12.78 | 21.11 | 29.44 |
Wherein, n is the OFDM symbol numbers.
According to table 3, when the OFDM symbol numbers is 3,, analyze the operating position of 4 kinds of form PDCCH below in conjunction with table 2, table 3.In table 3, when n=3, effective number of CCE is 21.11, and with 21.11 0.11 omit, then effective number of CCE is 21, and based on this, under 4 kinds of forms of PDCCH, the bar number of the PDCCH of every kind of form please refer to table 4.
In the table 4, the implication of second row is: it is 0 PDCCH that 21 wiht strip-lattice types are arranged, owing to during n=3,21 effective CCE are arranged, if all using forms are 0 PDCCH, because every wiht strip-lattice type is 0 PDCCH 1 CCE is arranged, so, have 21 wiht strip-lattice types and be 0 PDCCH.The implication of the third line is: it is that 0 PDCCH and 5 wiht strip-lattice types are 1 PDCCH that 11 wiht strip-lattice types are arranged, if 11 every wiht strip-lattice types of use are 0 PDCCH, then also have 10 effective CCE, for remaining 10 effective CCE, if using form is 1 PDCCH, because every wiht strip-lattice type is 1 PDCCH 2 CCE are arranged, be 1 PDCCH so can use 5 wiht strip-lattice types altogether, so 1 wiht strip-lattice type is that 0 PDCCH and 5 wiht strip-lattice types are that 1 PDCCH has 21 effective CCE.Table 4 following each go, the implication of last column is: it is 0 PDCCH that 1 wiht strip-lattice type is arranged, and 1 wiht strip-lattice type is 2 PDCCH, and 2 wiht strip-lattice types are 3 PDCCH, therefore, have 21 effective CCE.
Table 4
| PDCCH form 0 | PDCCH |
|
PDCCH form 3 |
| 21 | 0 | 0 | 0 |
| 11 | 5 | 0 | 0 |
| 1 | 10 | 0 | 0 |
| 1 | 8 | 1 | 0 |
| 1 | 2 | 4 | 0 |
| 1 | 6 | 0 | 1 |
| 1 | 4 | 1 | 1 |
| 1 | 0 | 3 | 1 |
| 1 | 0 | 1 | 2 |
More than analyzed the number of the spendable effective CCE of PDCCH.Below the shortcoming of PDCCH is analyzed.One skilled in the art will appreciate that generally speaking less data should be used less control information, for example, represent the bit number of control information generally should be less than the bit number of representative data.Under the less situation of data volume,, will make the control information bit number data bit number of comparing seem more if the amount of bits of control information does not correspondingly reduce.Therefore, for some particular services, such as Internet Protocol telephone (VoIP, Voice over Internet Protocol) business, this professional data quantity transmitted is very little, so VoIP is professional when using PDCCH, if also as other large-data operation, use more control information (for PDCCH, be CCE), under the limited condition of CCE number, can cause waste to the CCE resource.Generally speaking, by the particular location of the DCI bit among the PDCCH to the UE indexed resource, having increased the PDCCH signaling consumption in the existing scheme, is a kind of waste to the CCE resource of preciousness.
In addition, the signal that the terminal in the sub-district receives might produce error code in transmission course, therefore, need carry out chnnel coding to the signal of transmission, and to improve efficiency of transmission, the situation that reduces error code takes place.The basic thought of chnnel coding is to insert code element in source traffic, thereby reaches the purpose that receiving terminal is declared wrong and error correction.Be positioned at cell edge if handle the terminal of VoIP business, because communication quality might reduce, more likely in transport process, produce error code, therefore, when carrying out chnnel coding, need to insert more code element, promptly need to insert more bits, if use PDCCH, more bits means the more RE of needs, and in table 4, just probably needing using form is 3 PDCCH, every wiht strip-lattice type is that 3 PDCCH has 8 CCE, and be 3 o'clock in the OFDM symbol numbers, have 21 effective CCE, like this, can will reduce for effective CCE number that other terminal is used, probably influence the communication quality of other terminal.And, be 2 o'clock in the OFDM symbol numbers, this situation is more obvious.
Summary of the invention
The invention provides a kind of method, Apparatus and system of indexed resource, with waste that solves the CCE resource that existing scheme exists and the problem that influences terminal capabilities.
Scheme provided by the invention comprises:
A kind of method of indexed resource is used for mobile communication Long Term Evolution LTE system, comprising:
User equipment (UE) is monitored the physical downlink control channel PDCCH of compression, and wherein, the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing;
Resource number is known in the control information that described UE resolves described PDCCH;
Described UE utilizes the resource number of precognition and the corresponding relation of resource location, the resource location of definite resource number correspondence of being known.
Preferably, described UE predicts the corresponding relation of described resource number and resource location in the following manner:
The corresponding relation of described UE resource number and resource location is notified being described UE when distributing the initial transmission resource in the base station by high-level signaling; Perhaps, be the corresponding relation of described UE resource allocation numbering and resource location in advance.
Preferably, described resource number is meant CCE numbering in control channel unit among the PDCCH.
Preferably, described resource number be meant with described PDCCH in the Physical Resource Block PRB numbering of CCE mapping.
Preferably, the DCI of described compression is specially:
In the control information in described DCI, distributed transmission flag bit number is 0, a resource allocation bit number is 0, the resource allocation chunks bit number is 0, modulating-coding grade MCS bit number be 0 and new data indication bit number be 0.
Preferably, the DCI of described compression is specially:
In the control information in described DCI, distributed transmission flag bit number is 0, a resource allocation bit number is 0, the resource allocation chunks bit number is 3 or 4, modulating-coding grade MCS bit number be 0 and new data indication bit number be 0.
Alternatively, monitor at UE before the PDCCH of compression, also comprise:
The base station opens or closes and the semi-continuous scheduling duration by high-level signaling notice UE semi-continuous scheduling;
Wherein, described UE monitors the PDCCH of compression in the semi-continuous scheduling process.
Alternatively, described method also comprises:
Described UE receives data to the resource location of determining, and is correct as if detecting the data that receive, and then returns ACK message, if detect the error in data that receives, then returns NACK message;
The base station utilizes the resource location of the PDCCH notice UE misdata of compression, and retransmits the data that make a mistake if receive the NACK message that described UE returns.
Preferably, the process number of described re-transmission is determined by previous transmission pointer PTR pointer.
A kind of device of indexed resource is used for mobile communication Long Term Evolution LTE system, comprising: allocation units are used to UE to distribute the initial transmission resource;
Also comprise:
First notification unit, being used at described allocation units is described UE when distributing the initial transmission resource, notifies the corresponding relation of described UE resource number and resource location by high-level signaling;
The channel compression unit is used to make up the PDCCH of the compression of indexed resource numbering, and wherein, the PDCCH of described compression is that the Downlink Control Information DCI correspondence by compression obtains.
Alternatively, described device also comprises:
Second notification unit is used for notifying opening or closing of described UE semi-continuous scheduling and semi-continuous scheduling duration by high-level signaling, and wherein, described UE monitors the PDCCH of compression in the semi-continuous scheduling process.
Alternatively, described device also comprises:
The 3rd advice note unit is used in data re-transmission, utilizes the PDCCH that compresses to notify the resource location of described UE misdata.
A kind of device of knowing resource location is used for mobile communication Long Term Evolution LTE system, comprising:
Monitoring unit is used to monitor the PDCCH of compression;
Resolution unit, resource number is known in the control information that is used for resolving the PDCCH of described compression;
Determining unit is used to utilize the resource number of precognition and the corresponding relation of resource location, determines the resource location of the resource number correspondence that described resolution unit obtains.
Alternatively, described device also comprises:
The high-level signaling resolution unit is used to receive high-level signaling, obtains the corresponding relation of resource number and resource location in the described high-level signaling.
Alternatively, described device also comprises:
Dispensing unit is used for being in advance the corresponding relation of UE resource allocation numbering with resource location.
A kind of system of indexed resource is used for mobile communication Long Term Evolution LTE system, comprising:
The base station is used for sending the physical downlink control channel PDCCH of compressing to UE, and wherein, the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing;
UE is used to monitor the PDCCH of compression, and resource number is known in the control information of resolving wherein, the resource number that utilization is predicted and the corresponding relation of resource location, the resource location of definite resource number correspondence of being known.
As seen, the present invention does not utilize the limited CCE resource of PDCCH that the position of resource is indicated, but by the make an appointment corresponding relation of resource location of high-level signaling and UE, do not comprise or the less compression PDCCH that comprises indication bit thereby adopt, solved the problem of limited CCE among the waste PDCCH.
Particularly, embodiment uses numbering to come the indexed resource position.Owing to do not use or less use DCI bit indexed resource position, in the control information territory of amended DCI form, because for example the bit of resource block assignments becomes 0, perhaps become 3 or 4, so, the corresponding minimizing of total DCI amount of bits in DCI form control information territory, the DCI amount of bits is less, and the OFDM symbol quantity that is modulated into will be less, and then, the RE quantity of OFDM mapping also can reduce, and RE quantity reduces, and the CCE number of its composition also can correspondingly reduce, the CCE number that is PDCCH will reduce, so, saved the CCE resource, avoided the sub-district miscellaneous equipment is impacted.
In addition, under the constant situation of coded system,, mean that using less DCI bit just can reach the DCI bit number reduces coding effect before because the DCI bit number reduces.Perhaps,, just can reach the purpose of coding better, and improve the protecting data ability greatly, reduce cell equipment influence each other, improve antijamming capability if reduce the DCI bit that uses equal number before with the DCI bit number.
Description of drawings
Fig. 1 is the inventive method flow chart;
Fig. 2 is that the inventive method embodiment one uses CCE numbering indexed resource position view;
Fig. 3 is for using PTR pointer indication data retransmission schematic diagram;
Fig. 4 is the inventive method embodiment one flow chart;
Fig. 5 is that the inventive method embodiment two uses PRB numbering indexed resource position view;
Fig. 6 is the structure drawing of device of base station of the present invention;
Fig. 7 is the structure drawing of device of terminal of the present invention.
Embodiment
The core of the embodiment of the invention is, adopts not comprise or the PDCCH of the less DCI of comprising bit, avoided prior art problems dexterously, the problem includes: the problem of the CCE that takies preciousness among the PDCCH.
Before describing,, at first introduce the scheduling scheme of VoIP for ease of understanding.The scheduling scheme of the VoIP that LTE determines is a semi-continuous scheduling.The main thought of semi-continuous scheduling is: dynamic dispatching and continuous dispatching are combined.So-called dynamic dispatching, promptly the resource location of Fen Peiing is unfixing, change through regular meeting, so-called continuous dispatching, promptly the resource location of Fen Peiing is more fixing, does not generally change.Process mainly comprises: the opening or closing of semi-continuous scheduling, promptly notify terminal to have semi-continuous scheduling or notice terminal semi-continuous scheduling will finish, if semi-continuous scheduling is for opening, carve at a time, activate semi-continuous scheduling by control channel, the resource location that the notice receiving terminal distributes when receiving expression that receiving terminal returns when having received the message of misdata, uses control channel to notify the resource location of receiving terminal as the misdata distribution again.
VoIP is primarily aimed at four kinds of Packet Services: the initial transmission bag of the initial transmission bag of active period speech (voice) bag, voice retransmission packet, quiet period (SID) bag and SID retransmission packet, semi-continuous scheduling to the processing mode of these four kinds of Packet Services are:
For voice initial transmission bag, predefine resource allocation;
For the voice retransmission packet, adopt dynamic dispatching, but up VoIP retransmission packet also can adopt the mode of predefine resource allocation;
For SID initial transmission bag, adopt dynamic dispatching;
For the SID retransmission packet, adopt dynamic dispatching, but up VoIP retransmission packet also can adopt the mode of predefine resource allocation.
From above semi-continuous scheduling as can be seen, owing to still there is dynamic dispatching, therefore still need control channel to the processing mode of four kinds of VoIP Packet Services.
For realizing goal of the invention, the embodiment of the invention no longer adopts the resource allocation of demonstration, but adopts the resource allocation of hint.The so-called resource allocation that shows, for adopting bit indexed resource position among the PDCCH, the resource allocation of so-called hint is not for adopting bit indexed resource position among the PDCCH.
Please refer to Fig. 1, the method flow diagram for indexed resource of the present invention comprises:
S101: user equipment (UE) is monitored the physical downlink control channel PDCCH of compression, and wherein, the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing;
S102: resource number is known in the control information that described UE resolves described PDCCH;
S103: described UE utilizes the resource number of precognition and the corresponding relation of resource location, the resource location of definite resource number correspondence of being known.
Wherein, the resource number of precognition and the corresponding relation of resource location can have two kinds of implementations, first kind of mode is: the base station is when distributing the initial transmission resource for user equipment (UE), by the corresponding relation of high-level signaling notice UE resource number and resource location, the second way is: be the corresponding relation of UE resource allocation numbering with resource location in advance.Hereinafter, be that example describes only in first kind of mode.
And resource number is meant the CCE numbering, and at this moment, UE directly corresponds to resource location according to the numbering of CCE among the PDCCH; Perhaps, resource number is meant the PRB numbering, and at this moment, UE directly corresponds to resource location according to the PRB numbering.Below these two kinds of specific implementations are described in detail.
Embodiment one, and the CCE numbering has been adopted in present embodiment indexed resource position.
At first, the indexed resource position is come by CCE number in the base station, please refer to Fig. 2, total N CCE, be respectively CCE1, CCE2 ..., CCEN, two Physical Resource Block of the numbering 1 arrow indication of CCE1 (PRB, physical resource block), wherein PRB is used for store data, two PRB of the arrow indication of the numbering 2 indication CCE2 of CCE2, two PRB of the arrow indication of the numbering N indication CCEN of CCEN.
Each CCE has indicated two PRB in the present embodiment, this is a kind of scheme, can also comprise other scheme certainly, such as, each PRB of CCE indication or more PRB, perhaps, can also make each CCE indicate the PRB of different numbers, for example, CCE1 indicates 1 PRB, CCE2 indicates 3 PRB, and CCE3 indicates 3 PRB, or the like.
Adopt CCE numbering indexed resource position, the process number of re-transmission can be determined by previous transmission pointer (PTR, previous transmission pointer).Please refer to Fig. 3, PTR=5 represents that the packet of the head indication of arrow 1 is the re-transmission of packet of the afterbody indication of arrow 1, and PTR=8 represents that the packet of the head indication of arrow 2 is re-transmissions of packet of the afterbody indication of arrow 2.Like this, the HARQ process number of re-transmission just can have been determined.
Owing to use CCE indexed resource position, the bit number of DCI will significantly reduce, and for the bit number that DCI is described better significantly reduces, provides the bit number of each control information of prior art DCI earlier, for the various forms of DCI, be that example describes only with DCI form 1.Please refer to table 5,
Table 5
| The control information territory | Existing |
| Distributed transmission sign (Distributed transmission flag) | 1 (indicating whether to use distributed) |
| Resource allocation head (Resource allocation header) | 1 (type0 or type1) |
| Resource block assignments (RB allocation) | 25 |
| Modulating-coding grade (MCS) | 5 |
| Mixed automatic retransmission request process number (Hybrid ARQprocess number) | 3 or 4 |
| New data indication (New data indicator) | 1 |
| Redundancy versions (Redundancy version) | 2 |
| Power control commands |
2 |
| Radio Network Temporary Identifier/check digit (RNTI/CRC) | 16 |
| Total bit number | 56 or 57 |
When adopting CCE indexed resource position, in the table 5, the control information relevant with resource allocation in control information territory and some other control informations just can no longer need, its bit number will become 0, these control informations have: Distributed transmission flag, Resource allocation header, RBallocation, MCS, New data indicator.For convenience of description, the DCI form 1 that bit number is reduced calls the DCI of compression.
See also table 6, provided employing CCE indexed resource position, the bit number of each control information of the DCI of compression and the contrast of unpressed DCI,
Table 6
| The control information territory | Unpressed DCI bit number | The DCI bit number of compression |
| Distributed?transmission? |
1 | 0 |
| Resource?allocation? |
1 | 0 |
| RB?allocation | 25 | 0 |
| |
5 | 0 |
| Hybrid?ARQ?process?number | 3 or 4 | 3 or 4 |
| New?data? |
1 | 0 |
| Redundancy? |
2 | 2 |
| |
2 | 2 |
| RNTI/CRC | 16 | 16 |
| Total bit number | 56 or 57 | 23 or 24 |
As can be seen from Table 6, the bit number of DCI form 1 is reduced to 23 or 24 from original 56, perhaps, is reduced to 23 or 24 from original 57, at this, is that example describes to be reduced to 23 or 24 from 56 only.23/56=0.410,24/56=0.428, as seen, adopt CCE indexed resource position, the bit number of DCI form 1 nearly reduces half, bit number reduces, the symbol quantity of the OFDM that is modulated into will reduce, and then sign map is that the quantity of RE also can reduce, because CCE is made up of RE, RE reduces, and the CCE number also can reduce naturally.Because PDCCH is made up of CCE,,, the PDCCH of CCE number minimizing is called the PDCCH of compression at this for ease of describing.
It more than is exactly the bit number situation of each control information of the DCI of compression provided by the invention.During semi-continuous scheduling, just can use the PDCCH of compression provided by the invention.
Referring to Fig. 4, be embodiment one flow chart, comprising:
S401: the opening of terminal semi-continuous scheduling (promptly notify terminal to have semi-continuous scheduling, but uncertain when the beginning), duration are informed by high-level signaling in the base station, simultaneously the CCE number corresponding relation with resource location are notified to terminal.
S402: the base station adopts the DCI of compression provided by the invention to activate semi-continuous scheduling.
Activate the DCI notice terminal resource position that semi-continuous scheduling promptly uses compression for the first time herein.
S403: terminal receives data at the resource location of PDCCH appointment, if the data that receive do not have mistake, terminal is returned ACK message, makes a mistake in case detect the data that receive, and terminal is returned NACK message.
S404: NACK message is received in the base station, and the data that mistake occurs are retransmitted.
Need to prove, behind the base station activation semi-continuous scheduling, the short of NACK message that receives, just do not re-use the PDCCH notice terminal resource position of compression, and still new data is sent to the resource location of the PDCCH appointment of compression when activating, the resource location that terminal is learnt when activating receives data and gets final product, in case the base station receives NACK message, learn to retransmit some data, then use the resource location of the PDCCH notice terminal re-sends data of compression provided by the invention.
S405: terminal receives data retransmission to the resource location of data retransmission.
For non-data retransmission, the resource location that terminal is still learnt when activating receives data.
S406: the base station is by the pass (being that semi-continuous scheduling closes to an end) of high-level signaling notice terminal semi-continuous scheduling.
Embodiment two, are that with the difference of embodiment one two pairs of PRB Resource Block of embodiment number the indexed resource position, and the CCE of PDCCH and PRB have mapping relations.
Please refer to Fig. 5, show PRB block number indexed resource position.In advance the resource that sends is carried out the resource group # soon, every group of PRB distributed a PRB numbering, as No. 1 PRB group among Fig. 5, No. 2 PRB groups, No. 3 PRB groups.
Adopt PRB numbering indexed resource position, each the control information bit number of the DCI of compression and the contrast of unpressed DCI are as shown in table 7,
Table 7
| The control information territory | Unpressed DCI bit number | The DCI bit number of compression |
| Distributed?transmission? |
1 | 0 |
| Resource?allocation? |
1 | 0 |
| RB?allocation | 25 | 3 or 4 |
| |
5 | 0 |
| Hybrid?ARQ?process?number | 3 or 4 | 3 or 4 |
| New?data? |
1 | 0 |
| Redundancy? |
2 | 2 |
| |
2 | 2 |
| RNTI/CRC | 16 | 16 |
| Total bit number | 56 or 57 | 26,27 or 28 |
As can be seen from Table 7, the bit number of the DCI of compression is reduced to 26,27 or 28 from original 56, perhaps, is reduced to 26,27 or 28 from original 57, at this, is that example describes to be reduced to 26,27 or 28 from 56 only.26/56=0.464,27/56=0.482,28/56=0.5, as seen, adopt PRB numbering indexed resource position, the bit number of the DCI of compression nearly reduces half, and bit number reduces, and the symbol quantity of the OFDM that is modulated into will reduce, and then sign map is that the quantity of RE also can reduce, because CCE is made up of RE, RE reduces, and the CCE number also can reduce naturally.Equally, the PDCCH that the CCE number is reduced is called the PDCCH of compression.
For retransmission process number determine can reference example one.
Notice terminal resource position, base station, terminal to corresponding resource location receive data detailed process and embodiment one broadly similar, difference is, when transmitting terminal is informed the opening of terminal semi-continuous scheduling, duration by high-level signaling, the corresponding relation of PRB numbering and resource location is notified to terminal.All the other each steps please refer to the description of embodiment one.
It is pointed out that embodiment one and embodiment two are that example is illustrated with the form 1 of DCI only, method provided by the invention is not limited thereto, also applicable to other down control channel or the channel except down control channel.
Comparing embodiment one and embodiment two, the control information bit number of embodiment one reduces more, thereby has saved more resources, but has increased the difficulty of base station scheduling CCE, the minimizing of embodiment two control information bit numbers does not have embodiment many, but base station scheduling CCE will be simpler than embodiment one.
From embodiment one and embodiment two as can be seen,, effectively reduced the bit number of control information, thereby reduced the number of CCE, when using PDCCH, can save the CCE resource, avoided interference by adopting number (CCE number or PRB numbering) indexed resource position.
Corresponding with said method, the present invention also provides the device of a kind of indexed resource position, and this device is positioned at the base station equipment side, can realize by software, hardware or software and hardware combining mode.
Please refer to Fig. 6, be the structure drawing of device of indexed resource of the present invention position,
For the base station, comprising:
601: allocation units are used to UE to distribute the initial transmission resource;
602: the first notification units are used for when described allocation units are UE distribution initial transmission resource, by the corresponding relation of high-level signaling notice UE resource number and resource location;
603: the channel compression unit, be used to make up the PDCCH of the compression of indexed resource numbering, wherein, the PDCCH of described compression is that the Downlink Control Information DCI correspondence of compression obtains.
Please refer to Fig. 7, for the structure drawing of device of resource location is known in the present invention,
For terminal, comprising:
701: monitoring unit is used to monitor the PDCCH of compression;
702: resolution unit, resource number is known in the control information that is used for resolving the PDCCH of described compression;
703: determining unit, be used to utilize the resource number of precognition and the corresponding relation of resource location, determine the resource location of the resource number correspondence that described resolution unit obtains.
In structure drawing of device shown in Figure 7, the corresponding relation for the terminal precognition can also comprise:
The high-level signaling resolution unit is used to receive high-level signaling, obtains the corresponding relation of resource number and resource location in the described high-level signaling;
Perhaps, dispensing unit is used for being in advance the corresponding relation of UE resource allocation numbering with resource location.
Hereinafter, be that example describes only with the high-level signaling resolution unit.
And resource number is meant the CCE numbering, and perhaps, resource number is meant the PRB numbering, below these two kinds of specific implementations is described in detail.Embodiment one, associated methods embodiment one, and the CCE numbering has been adopted in indexed resource position in base station in the present embodiment.
Second notification unit of base station is opened by high-level signaling notice UE semi-continuous scheduling, and when the allocation units of base station were UE distribution initial transmission resource, first notification unit was by the corresponding relation of high-level signaling notice UE resource number and resource location.The channel compression unit makes up the PDCCH of the compression of indexed resource numbering, and wherein, the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing.The PDCCH notice terminal resource position of compression is used in the base station.
The high-level signaling resolution unit of terminal receives high-level signaling, obtains the corresponding relation of resource number and resource location in the described high-level signaling.Monitoring unit is monitored the PDCCH of compression, resolution unit is resolved the control information among the PDCCH that listens to, thereby knows resource number, the corresponding relation that determining unit parses according to the high-level signaling resolution unit, determine resource location, receiving element receives data to the resource location of determining.And whether its detecting unit detects the data that receive correct, if correct, return the unit and return ACK message to the base station, otherwise, return NACK message.
The 3rd advice note unit of base station utilizes the resource location of the PDCCH notice UE misdata of compression, and retransmission unit retransmits the data that make a mistake.
The receiving element of terminal receives the data that make a mistake that retransmit to the new resource location of misdata.
Embodiment two, associated methods embodiment two, and the PRB numbering has been adopted in indexed resource position in base station in the present embodiment.
The function of all the other each unit of present embodiment and device embodiment one broadly similar specifically please refer to device embodiment one.
The present invention also provides the system of indexed resource position, comprising:
The base station is used for sending the physical downlink control channel PDCCH of compressing to UE, and wherein, the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing;
UE is used to monitor the PDCCH of compression, and resource number is known in the control information of resolving wherein, the resource number that utilization is predicted and the corresponding relation of resource location, the resource location of definite resource number correspondence of being known.
Wherein, the resource number of precognition and the corresponding relation of resource location can have two kinds of implementations equally, and two kinds of implementations with method embodiment are identical respectively, in the literary composition, are that example describes in first kind of mode only hereinafter.
And resource number is meant the CCE numbering, and perhaps, resource number is meant the PRB numbering, below these two kinds of specific implementations is described in detail.
Embodiment one, associated methods embodiment one, and the CCE numbering has been adopted in indexed resource position, present embodiment base station.
The opening of terminal semi-continuous scheduling (promptly notify terminal to have semi-continuous scheduling, but uncertain when the beginning), duration are informed by high-level signaling in the base station, simultaneously the CCE number corresponding relation with resource location are notified to terminal.Adopt the PDCCH of compression provided by the invention to activate semi-continuous scheduling.
Terminal receives data at the resource location of PDCCH appointment, if the data that receive do not have mistake, terminal is returned ACK message, makes a mistake in case detect the data that receive, and terminal is returned NACK message.
In case the base station, base station receives NACK message, learn to retransmit some data, then use the resource location of the PDCCH notice terminal re-sends data of compression provided by the invention, and retransmit the data that make a mistake.
Terminal receives data retransmission to the resource location of data retransmission.
Embodiment two, associated methods embodiment two, and the PRB numbering has been adopted in indexed resource position, present embodiment base station.
Step about base station and terminal execution with the system embodiment broadly similar, specifically sees also system embodiment one.
More than method, the Apparatus and system of a kind of indexed resource provided by the present invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. the method for an indexed resource is used for mobile communication Long Term Evolution LTE system, is core with the OFDM, it is characterized in that, comprising:
User equipment (UE) is monitored the physical downlink control channel PDCCH of compression, and wherein, the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing;
Resource number is known in the control information that described UE resolves described PDCCH, and described resource number is meant CCE numbering in control channel unit among the PDCCH, and each CCE indicates a plurality of Physical Resource Block PRB or each CCE to indicate the PRB of different numbers;
Described UE utilizes the resource number of precognition and the corresponding relation of resource location, the resource location of definite resource number correspondence of being known.
2. method according to claim 1 is characterized in that, described UE predicts the corresponding relation of described resource number and resource location in the following manner:
The base station is being described UE when distributing the initial transmission resource, notifies the corresponding relation of described UE resource number and resource location by high-level signaling, perhaps, be that described UE resource allocation is numbered and the corresponding relation of resource location in advance.
3. method according to claim 1 is characterized in that, the DCI of described compression is specially:
In the control information in described DCI, distributed transmission flag bit number is 0, a resource allocation bit number is 0, the resource allocation chunks bit number is 0, modulating-coding grade MCS bit number be 0 and new data indication bit number be 0.
4. method according to claim 1 is characterized in that, the DCI of described compression is specially:
In the control information in described DCI, distributed transmission flag bit number is 0, a resource allocation bit number is 0, the resource allocation chunks bit number is 3 or 4, modulating-coding grade MCS bit number be 0 and new data indication bit number be 0.
5. according to each described method of claim 1 to 4, it is characterized in that, monitor at UE before the PDCCH of compression, also comprise:
The base station opens or closes and the semi-continuous scheduling duration by high-level signaling notice UE semi-continuous scheduling;
Wherein, described UE monitors the PDCCH of compression in the semi-continuous scheduling process.
6. method according to claim 1 is characterized in that, described method also comprises:
Described UE receives data to the resource location of determining, and is correct as if detecting the data that receive, and then returns ACK message, if detect the error in data that receives, then returns NACK message;
The base station utilizes the resource location of the PDCCH notice UE misdata of compression, and retransmits the data that make a mistake if receive the NACK message that described UE returns.
7. method according to claim 6 is characterized in that, the process number of described re-transmission is determined by previous transmission pointer PTR pointer.
8. the device of an indexed resource is used for mobile communication Long Term Evolution LTE system, is core with the OFDM, comprising: allocation units are used to UE to distribute the initial transmission resource;
It is characterized in that, also comprise:
First notification unit, being used at described allocation units is that described UE is when distributing the initial transmission resource, notify the corresponding relation of described UE resource number and resource location by high-level signaling, described resource number is meant CCE numbering in control channel unit among the PDCCH, and each CCE indicates a plurality of Physical Resource Block PRB or each CCE to indicate the PRB of different numbers;
The channel compression unit is used to make up the PDCCH of the compression of indexed resource numbering, and wherein, the PDCCH of described compression is that the Downlink Control Information DCI correspondence by compression obtains.
9. device according to claim 8 is characterized in that, described device also comprises:
Second notification unit is used for notifying opening or closing of described UE semi-continuous scheduling and semi-continuous scheduling duration by high-level signaling, and wherein, described UE monitors the PDCCH of compression in the semi-continuous scheduling process.
10. device according to claim 8 is characterized in that, described device also comprises:
The 3rd advice note unit is used in data re-transmission, utilizes the PDCCH that compresses to notify the resource location of described UE misdata.
11. a device of knowing resource location is used for mobile communication Long Term Evolution LTE system, is core with the OFDM, it is characterized in that, comprising:
Monitoring unit is used to monitor the PDCCH of compression, and the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing;
Resolution unit, resource number is known in the control information that is used for resolving the PDCCH of described compression, and described resource number is meant CCE numbering in control channel unit among the PDCCH, and each CCE indicates a plurality of Physical Resource Block PRB or each CCE to indicate the PRB of different numbers;
Determining unit is used to utilize the resource number of precognition and the corresponding relation of resource location, determines the resource location of the resource number correspondence that described resolution unit obtains.
12. device according to claim 11 is characterized in that, described device also comprises:
The high-level signaling resolution unit is used to receive high-level signaling, obtains the corresponding relation of resource number and resource location in the described high-level signaling.
13. device according to claim 13 is characterized in that, described device also comprises:
Dispensing unit is used for being in advance the corresponding relation of UE resource allocation numbering with resource location.
14. the system of an indexed resource is used for mobile communication Long Term Evolution LTE system, is core with the OFDM, it is characterized in that, comprising:
The base station is used for sending the physical downlink control channel PDCCH of compressing to UE, and wherein, the PDCCH of described compression is obtained by the Downlink Control Information DCI correspondence of compressing;
UE, be used to monitor the PDCCH of compression, resource number is known in the control information of resolving wherein, the resource number that utilization is predicted and the corresponding relation of resource location, the resource location of definite resource number correspondence of being known, described resource number is meant CCE numbering in control channel unit among the PDCCH, and each CCE indicates a plurality of Physical Resource Block PRB or each CCE to indicate the PRB of different numbers.
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