CN101626625B - A kind of implementation method of downlink carrier control domain - Google Patents
A kind of implementation method of downlink carrier control domain Download PDFInfo
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Abstract
The invention discloses a kind of implementation method of downlink carrier control domain, realize the interference synergic between LTE-Advanced system small area.Running time-frequency resource at least one carrier wave in a subframe is divided into control domain and non-controlling territory by the method, is arranged the running time-frequency resource of described control domain by signaling.Wherein, described control domain comprises at least one sub-control domain, frequency division multiplexing between described sub-control domain; Described non-controlling territory is the resource in running time-frequency resource except described control domain.Compared with prior art, the inventive method, can adjust bandwidth and the frequency location of carrier control domain neatly, achieves interference synergic and the channeling of minizone preferably.
Description
Technical field
The present invention relates to field of mobile wireless communication, particularly relate to the implementation method of a kind of downlink carrier control domain in wireless communication system.
Background technology
(1) frame structure of E-UTRA
Fig. 1 (a) and Fig. 1 (b) is respectively Long Term Evolution (Long Term Evolution, LTE) System Frequency Division Duplex (Frequency Division Duplex, FDD) the frame structure schematic diagram of pattern and time division duplex (TimeDivision Duplex, TDD) pattern.
In the frame structure of the fdd mode shown in Fig. 1 (a), the radio frames (radioframe) of a 10ms is 0.5ms by 20 length, time slot (slot) composition of numbering 0 ~ 19, time slot 2i and 2i+1 forms subframe (subframe) i that length is 1ms.
In the frame structure of the tdd mode shown in Fig. 1 (b), the radio frames (radioframe) of a 10ms is made up of two long fields (half frame) for 5ms, and a field comprises 5 long subframes (subframe) for 1ms.Subframe i is defined as 2 long time slot 2i and 2i+1 for 0.5ms.
In two kinds of frame structures, for standard cyclic prefix (Normal Cyclic Prefix, Normal CP), it is the symbol of 66.7us that a time slot comprises 7 length, wherein the CP length of first symbol is 5.21us, and the CP length of all the other 6 symbols is 4.69us; For expansion (Extended) CP, a time slot comprises 6 symbols, and the CP length of all symbols is 16.67us.
(2) E-UTRA definition down physical channel and signal
Physical Broadcast Channel (Physical broadcast channel, PBCH): bearing downlink carrier system bandwidth, physical mixed automatic re-transmission indicating channel (Physical Hybrid ARQ IndicatorChannel, PHICH) is arranged, the information such as System Frame Number.Broadcast channel (BroadcastCHannel, BCH) transmission block after coding is mapped to 4 subframes in the interval of 40ms.The timing of 40ms is obtained by blind Detecting, does not namely have direct signaling 40ms timing.Each subframe is thought can self-demarking code, if namely channel condition is enough good, BCH can from single receipt decoding.
Physical Control Format Indicator Channel (Physical control format indicator channel, PCFICH): notice UE is used for transmitting physical downlink channel control (Physical downlink controlchannel, PDCCH) OFDM symbol number, each sub-frame transmission.
Physical Downlink Control Channel (PDCCH): UE is about paging channel (Paging Channel for notice, and the Resourse Distribute of downlink shared passage (DL-SCH), and the mixed automatic retransfer relevant to DL-SCH (Hybrid ARQ) information PCH).Carrying uplink scheduling authorization (uplinkscheduling grant).
Physical mixed automatic re-transmission indicating channel (Physical Hybrid ARQ Indicator Channel, PHICH): carrying corresponds to the ack/nack (ACK/NAKs) of the mixed automatic retransfer (Hybrid ARQ) of uplink.
Physical Downlink Shared Channel (Physical downlink shared channel, PDSCH): carrying DL-SCH and PCH.
Physical Multicast Channel (Physical multicast channel, PMCH): carrying MCH.
Descending pilot frequency (Downlink reference Signal): by be inserted into first of each time slot and the known reference signal of third from the bottom OFDM symbol form.A reference signal transmission is had at each antenna port.Descending antenna port equals 1,2, or 4.The reference signal sequence of two dimension is the product of pseudo random sequence by symbol of a two-dimentional orthogonal sequence and two dimension.There is the two-dimensional pseudo-random sequence that 3 kinds of different two-dimensional quadrature sequences are different with 170.The combination of the corresponding unique orthogonal sequence of the ID of each community and pseudo random sequence.
(3) start communication link process of establishing
Fig. 2 is the time-frequency location schematic diagram of each physical channel of FDD frame structure descending carrier.Fig. 3 is E-UTRAN start communication link Establishing process schematic diagram.As shown in Figure 3, this link Establishing process mainly comprises the steps:
Step S310, after start, UE performs Cell searching, and by primary synchronization channel (PSCH) and the auxiliary synchronization channel (SSCH) of search cell, the descending sub frame obtaining community is synchronous, the center frequency point of community ID and carrier wave;
Step S320, UE by receipt decoding PBCH, obtain the information such as to arrange of downlink system bandwidth, PHICH configuration, the frame number of system and system pilot (Reference Signal);
Step S330, UE according to the information such as to arrange of the downlink system bandwidth obtained, community ID and system pilot, determine PCFICH time/frequency position, reception PCFICH channel is also decoded, obtain PDCCH control domain OFDM symbol number information, determine PHICH time/frequency resource location;
The information such as the PDCCH territory OFDM symbol number that step S340, UE carry according to the downlink system bandwidth obtained, community ID, PCFICH, PHICH configuration and system pilot are arranged, determine the search volume of PDCCH, carry out PDCCH blind check;
Step S350, by being used to indicate the PDCCH of the PDSCH of bearing system message in PDCCH search space blind check, the system message carried in the corresponding PDSCH that decodes, obtains the message of Multi-Carrier Radio Resource configuration, completes uplink synchronous;
Step S360, carries out multi-upstream access by the configuration of Multi-Carrier Radio Resource, completes communication link and sets up.
(4) senior Long Term Evolution (LTE-Advanced)
LTE Release-8 defines 6 kinds of bandwidth: 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz.
LTE-Advanced (Further Advancements for E-UTRA) is the evolution version of LTE Release-8.Except to meet or more than 3GPP TR 25.913: except all related needs of " Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN) ", also will meet or exceed the demand of IMT-Advanced that ITU-R proposes.Wherein, refer to the demand of LTE Release-8 backward compatibility: the terminal of LTE Release-8 can work in the network of LTE-Advanced; The terminal of LTE-Advanced can work in the network of LTE Release-8.In addition, LTE-Advanced at the spectrum disposition of different size, should be able to work, to reach higher performance and Target peak rate under comprising the spectrum disposition (the continuous print frequency spectrum resource as 100MHz) wider than LTE Release-8.Consider the compatibility with LTE Release-8, for the bandwidth being greater than 20MHz, adopt the mode of carrier aggregation (Carrier aggregation), that is:
Two or more component carriers (component carriers) assembles the uplink/downlink transmission bandwidth to support to be greater than 20MHz.Terminal can receive simultaneously/send one or more component carrier (component carriers) by its ability, has the transmission that can simultaneously to receive more than the LTE-A terminal of 20MHz receiving ability on multiple component carrier.LTE Rel-8 terminal can only receive the transmission on one-component carrier wave, and the structure as this component carrier follows Rel-8 specification.
At present, some following definition are had about the form of carrier wave in LTE-Advanced standard:
(1) backward compatibility carrier wave:
The UE of all existing LTE versions can be accessed, (stand-alone) or the part as spectrum aggregation can be operated using the form of single carrier, for FDD, backward compatibility carrier wave always occurs in pairs, i.e. down link (DL) and up link (UL).
(2) non-backward compatible carrier waves:
If definition, such carrier wave can be defined the UE access of the LTE version of such carrier wave, can not be accessed by the UE of LTE version before.If incompatibility is derived from frequency reuse distance, then can operate (stand-alone) with the form of single carrier, or as the part of spectrum aggregation.
(3) carrier wave is expanded:
If definition, then can not operate with the form of single carrier, must be the part of a carrier wave set, and wherein have at least a carrier wave to be can operate (stand-alone) with the form of single carrier.
At present, the implementation method about LTE-Advanced carrier wave does not also have conclusion, and wherein a kind of feasible scheme continues to use the channel architecture in LTE Rel-8.Consider and be necessary to carry out interference synergic (Inter-Cell Interference Control) in minizone to improve spectrum efficiency in LTE-Advanced, and the bandwidth of control domain (comprising PDCCH, PCFICH and PHICH) is identical with the bandwidth of Traffic Channel (PDSCH) in LTE Rel-8, be unfavorable for the interference synergic between the control signal of minizone.In addition, the descending pilot frequency in LTE Rel-8 with identical power delivery, is unfavorable for channeling and the interference synergic of the Traffic Channel of minizone in total system bandwidth.
Summary of the invention
Technical problem to be solved by this invention, is the implementation method needing to provide a kind of downlink carrier control domain, realizes the interference synergic between LTE-Advanced system small area.
In order to solve the problems of the technologies described above, the invention provides a kind of implementation method of downlink carrier control domain, comprising:
Running time-frequency resource at least one carrier wave in a subframe is divided into control domain and non-controlling territory, the running time-frequency resource of described control domain is set by signaling.
Preferably, described control domain comprises at least one sub-control domain, frequency division multiplexing between described sub-control domain.
Further, described sub-control domain transmitting physical downlink channel control, Physical Control Format Indicator Channel or physical mixed automatic re-transmission indicating channel channel.
And the frequency resource of described sub-control domain is arranged by signaling.Further, the signaling of described frequency resource is set, is carried by Physical Broadcast Channel.
And, by being carried on the signaling on Physical Control Format Indicator Channel, indicate the time-domain position of described sub-control domain.
Preferably, described non-controlling territory is the resource in running time-frequency resource except described control domain.
Further, described non-controlling territory transmitting physical broadcast channel, Physical Downlink Shared Channel, primary synchronization channel, auxiliary synchronization channel and pilot channel and signal.
And the power independent allocation separately in described non-controlling territory bandwidth and control domain bandwidth, is indicated by signaling respectively.
Compared with prior art, the implementation method of the downlink carrier control domain that the present invention provides for LTE-Advanced, bandwidth and the frequency location of carrier control domain can be adjusted neatly, the pilot tone achieving different frequency position in carrier wave from Physical Downlink Shared Channel PDSCH with different power delivery, achieve interference synergic and the channeling of minizone preferably, propose the flexibility of high system call, be conducive to realization and the development of LTE-Advanced system.
Accompanying drawing explanation
The frame structure schematic diagram that Fig. 1 (a) is LTE system fdd mode;
The frame structure schematic diagram that Fig. 1 (b) is LTE system tdd mode;
Fig. 2 is the time-frequency location schematic diagram of each physical channel of FDD frame structure descending carrier;
Fig. 3 is E-UTRAN start communication link Establishing process schematic diagram;
Fig. 4 (a), Fig. 4 (b) and Fig. 4 (c) for control domain bandwidth be less than system bandwidth time, the frequency location that 3 kinds of control domain are different.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.
Downlink carrier control domain of the present invention when realizing, by k in a subframe (k be more than or equal to 1 integer) running time-frequency resource on carrier wave is divided into control domain and non-controlling territory, and arranged the running time-frequency resource of this control domain by signaling.
This control domain comprise p (p be more than or equal to 1 integer) individual sub-control domain, frequency division multiplexing between each sub-control domain.
This sub-control domain can transmit PDCCH, PCFICH or PHICH channel.
The frequency resource of this sub-control domain is arranged by signaling, and wherein this signaling is carried by Physical Broadcast Channel PBCH (Physical broadcast channel).
The time-domain position of this sub-control domain is indicated by signaling, and this signaling bear is on PCFICH channel.
This non-controlling territory is the resource in running time-frequency resource except control domain, and the channel such as PBCH, PDSCH, PSCH, SSCH and pilot tone and signal can be transmitted in this non-controlling territory.
Power independent allocation separately in this non-controlling territory bandwidth sum control domain bandwidth, is indicated by signaling respectively.
The implementation method of downlink carrier control domain of the present invention is described with specific embodiment below.In following examples, for frame structure 1, wherein k=1, p=1.
First embodiment
The information such as Physical Broadcast Channel (Physical broadcast channel, PBCH) bearing downlink carrier system bandwidth, PHICH are arranged, the bandwidth of System Frame Number and control domain and frequency location.
The time-domain resource of the signaling instruction control domain of PCFICH channel bearing is front n OFDM symbol (1≤n≤4) in a subframe.
PDCCH, PCFICH and PHICH transmit in control domain.
By the bandwidth instructions field of m (m>=1) bit (bit) in Physical Broadcast Channel, represent 2
mplant carrier control domain bandwidth.The frequency location instructions field of r (r>=1) bit, represents 2 to each control domain bandwidth
rthe control domain frequency location of individual acquiescence.Such as:
(1) m=1, bandwidth instructions field 0,1 two kinds of values, can represent that control domain bandwidth is identical with system bandwidth, or a kind of control domain bandwidth of acquiescence.The frequency location of the control domain bandwidth of this acquiescence is as follows:
R=1, frequency location instructions field 0,1 two kinds of values, can represent the frequency location of two kinds of acquiescences of control domain.
R=2, frequency location instructions field 00,01,10,11 totally four kinds of values, can represent the frequency locations of 4 kinds of acquiescences of control domain.
(2) m=2, bandwidth instructions field 00,01,10,11 totally four kinds of values, can represent four kinds of control domain bandwidth given tacit consent to.The frequency location of the control domain bandwidth of acquiescence is as follows:
R=1, to each control domain bandwidth, frequency location instructions field 0,1 two kinds of values, can represent the frequency location of two kinds of acquiescences of control domain.
R=2, to each control domain bandwidth, frequency location instructions field 00,01,10,11 totally four kinds of values can represent the frequency locations of 4 kinds of acquiescences of control domain.
Power independent allocation separately in the bandwidth sum control domain bandwidth of non-controlling territory, is indicated by signaling respectively.Such as:
The EPRE (Energy Per Resource Element, the energy of each RE) of the proprietary pilot tone of pilot tone antenna port and community, in control domain bandwidth and non-controlling territory bandwidth, can arrange respectively and be indicated by signaling respectively.
Two ratio ρ of PDSCH EPRE and the proprietary pilot tone EPRE in community between different OFDM symbol
bwith ρ
a, its ratio ρ
b/ ρ
acan arrange respectively and be indicated by signaling respectively in control domain bandwidth and non-controlling territory bandwidth.
Fig. 4 (a), Fig. 4 (b) and Fig. 4 (c) for control domain bandwidth be less than system bandwidth time, the frequency location that 3 kinds of control domain are different.
Second embodiment
The information such as Physical Broadcast Channel bearing downlink carrier control domain bandwidth, PHICH setting, System Frame Number and system bandwidth.
The time-domain resource of the signaling instruction control domain of PCFICH channel bearing is front n OFDM symbol (1≤n≤4) in a subframe.
PDCCH, PCFICH and PHICH transmit in control domain.
1.25MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz totally 6 kinds of control domain bandwidth are represented with 3bit in Physical Broadcast Channel PBCH (Physical broadcast channel).
2 are represented with m (m>=1) bit in Physical Broadcast Channel PBCH (Physical broadcast channel)
mplant system bandwidth.
During m=1,0,1 two kinds of values, can represent that control domain bandwidth is identical with system bandwidth, or a kind of system bandwidth of acquiescence.
During m=2, bandwidth instructions field 00,01,10,11 4 kinds of values, can represent that control domain bandwidth is identical with system bandwidth, and the system bandwidth of three kinds of acquiescences.
During m=3,000,001,010,011,100,101,110,111 8 kinds of values, may be used for representing that control domain bandwidth is identical with system bandwidth, and the system bandwidth of five kinds of acquiescences.
Power independent allocation separately in the bandwidth sum control domain bandwidth of non-controlling territory, is indicated by signaling respectively.Such as:
The EPRE of the proprietary pilot tone of pilot tone antenna port and community can be arranged respectively in control domain bandwidth and non-controlling territory bandwidth, and is indicated by signaling respectively.
Two ratio ρ of PDSCH EPRE and the proprietary pilot tone EPRE in community between different OFDM symbol
bwith ρ
a, its ratio ρ
b/ ρ
ain control domain bandwidth and non-controlling territory bandwidth, volume can arrange respectively and be indicated by signaling respectively.
3rd embodiment
The information such as Physical Broadcast Channel bearing downlink carrier control domain bandwidth, PHICH setting and System Frame Number.
The time-domain resource of the signaling instruction control domain of PCFICH channel bearing is front n OFDM symbol (1≤n≤4) in a subframe.
PDCCH, PCFICH and PHICH transmit in control domain.
1.25MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz totally 6 kinds of control domain bandwidth are represented with 3bit in Physical Broadcast Channel.
Bearing downlink carrier system bandwidth information in system information SIB-2.
Power independent allocation separately in the bandwidth sum control domain bandwidth of non-controlling territory, is indicated by signaling respectively.Such as:
The EPRE of the proprietary pilot tone of pilot tone antenna port and community, in control domain bandwidth and non-controlling territory bandwidth, can arrange respectively and be indicated by signaling respectively.
Two ratio ρ of PDSCH EPRE and the proprietary pilot tone EPRE in community between different OFDM symbol
bwith ρ
a, its ratio ρ
b/ ρ
ain control domain bandwidth and non-controlling territory bandwidth, can arrange respectively and be indicated by signaling respectively.
From foregoing, on the basis of the physical channel that the present invention defines at LTE Rel-8 and signal structure, for LTE-Advanced provides a kind of implementation method of downlink carrier control domain, the method can adjust bandwidth and the frequency location of carrier control domain neatly, the pilot tone achieving different frequency position in carrier wave from Physical Downlink Shared Channel PDSCH with different power delivery, achieve interference synergic and the channeling of minizone preferably, propose the flexibility of high system call, be conducive to realization and the development of LTE-Advanced system.
Although the execution mode disclosed by the present invention is as above, the execution mode that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technical staff in any the technical field of the invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (7)
1. an implementation method for downlink carrier control domain, is characterized in that, comprising:
In LTE-Advanced system, the running time-frequency resource at least one carrier wave in a subframe is divided into control domain and non-controlling territory, the running time-frequency resource of described control domain is set by signaling;
Described control domain comprises at least one sub-control domain, frequency division multiplexing between described sub-control domain;
Power independent allocation separately in described non-controlling territory bandwidth and control domain bandwidth, is indicated by signaling respectively.
2. the method for claim 1, is characterized in that:
Described sub-control domain transmitting physical downlink channel control, Physical Control Format Indicator Channel or physical mixed automatic re-transmission indicating channel channel.
3. the method for claim 1, is characterized in that:
The frequency resource of described sub-control domain is arranged by signaling.
4. method as claimed in claim 3, is characterized in that:
The signaling of described frequency resource is set, is carried by Physical Broadcast Channel.
5. the method for claim 1, is characterized in that:
By being carried on the signaling on Physical Control Format Indicator Channel, indicate the time-domain position of described sub-control domain.
6. the method for claim 1, is characterized in that:
Described non-controlling territory is the resource in running time-frequency resource except described control domain.
7. method as claimed in claim 6, is characterized in that:
Described non-controlling territory transmitting physical broadcast channel, Physical Downlink Shared Channel, primary synchronization channel, auxiliary synchronization channel and pilot channel and signal.
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| CN200910161904.1A CN101626625B (en) | 2009-08-05 | 2009-08-05 | A kind of implementation method of downlink carrier control domain |
| PCT/CN2010/073360 WO2011015076A1 (en) | 2009-08-05 | 2010-05-28 | Method and device for realizing downlink carrier control region |
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| CN101626625B (en) * | 2009-08-05 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of implementation method of downlink carrier control domain |
| WO2012109790A1 (en) * | 2011-02-17 | 2012-08-23 | Renesas Mobile Corporation | Carrier with configurable downlink control region |
| US10638464B2 (en) | 2011-04-01 | 2020-04-28 | Futurewei Technologies, Inc. | System and method for transmission and reception of control channels in a communications system |
| CN102186251B (en) * | 2011-04-29 | 2016-09-28 | 中兴通讯股份有限公司 | The transmission method of Downlink Control Information and system |
| CN102958133B (en) * | 2011-08-25 | 2015-04-08 | 华为技术有限公司 | Communication system access method, downlink information transmitting method, terminal and base station |
| CN108199999B (en) * | 2011-11-04 | 2021-03-26 | 中兴通讯股份有限公司 | Carrier control domain configuration method and device |
| CN103107857B (en) * | 2011-11-14 | 2017-02-08 | 中兴通讯股份有限公司 | Sending method and sending device for improving physical downlink control channel |
| US9072107B2 (en) * | 2012-01-11 | 2015-06-30 | Interdigital Patent Holdings, Inc. | Adaptive control channel |
| CN103944699A (en) * | 2013-01-18 | 2014-07-23 | 中兴通讯股份有限公司 | System frame number information transmission method, device and system |
| US11395279B2 (en) * | 2017-02-06 | 2022-07-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Data transmissions in control regions |
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| CN101043496A (en) * | 2006-03-20 | 2007-09-26 | 华为技术有限公司 | Method and apparatus for multiplexing different service pilot resources of multi-carrier communication system |
| WO2009059431A1 (en) * | 2007-11-07 | 2009-05-14 | Nortel Networks Limited | Methods and systems for channelization |
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