CN109428701A - A kind of down control channel configuration method - Google Patents
A kind of down control channel configuration method Download PDFInfo
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- CN109428701A CN109428701A CN201710760510.2A CN201710760510A CN109428701A CN 109428701 A CN109428701 A CN 109428701A CN 201710760510 A CN201710760510 A CN 201710760510A CN 109428701 A CN109428701 A CN 109428701A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
- H04L5/0025—Spatial division following the spatial signature of the channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
- H04L5/0039—Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
- H04L5/0041—Frequency-non-contiguous
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Abstract
This application provides a kind of down control channel configuration methods, are applied in 5G system, and when the work of 5G system is in high band, configuration is that each user sends descending control signaling in the 1st OFDM symbol of subframe using the mode of simulation velocity of wave figuration；When the work of 5G system is in low-frequency range, configuration is each user at first of subframe using the mode of digital beam forming, or descending control signaling is sent in the first two OFDM symbol, when configuration sends the frequency domain size of the symbol of descending control signaling, the frequency domain of configuration supports the size of maximum downstream control information loads and the frequency domain under maximum polymerization grade combination, and supports minimum UE bandwidth；The REG that configuration sends descending control signaling is made of a PRB of frequency domain and an OFDM symbol of time-domain；Each CCE is made of 6 REG.The technical solution can satisfy the demand of 5G system descending control channel transmission.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of down control channel configuration method.
Background technique
LTE down control channel is used for the transmission of bearing downlink control signaling, and the Physical layer control information of carrying includes upper
The HARQ response message of row data transmission, scheduling information, the uplink power control commands information of downlink data transmission etc..
Down control channel is broadly divided into: referring to Physical Control Format Indicator Channel (Physical Control Format
Indicator Channel, PCFICH), it is mainly used to transmit control format indicator；The instruction of physical mixed automatic repeat request
Channel (Physical Hybrid Automatic Repeat Request Indicator Channel, PHICH), is used to
Transmit HARQ indicator；Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), mainly
For transmitting Downlink Control Information.
The subcarrier spacing fixation of LTE system is 15kHz, frame length 1ms, and with the introducing of the big bandwidth of high band, 5G
NR supports a variety of subcarrier spacings, corresponding frame structure also to change therewith, other than supporting common subframe, also support mini
The subframe structure of slot, therefore, the structure of the existing down control channel for realizing configuration do not adapt to the application of 5G NR technology.
Summary of the invention
In view of this, the application provides a kind of down control channel configuration method, 5G system descending control letter can satisfy
The demand of road transmission.
In order to solve the above technical problems, the technical solution of the application is achieved in that
A kind of down control channel configuration method is applied in 5G system, this method comprises:
When the work of 5G system is in high band, configuration is each user the of subframe using the mode of simulation velocity of wave figuration
Descending control signaling is sent in 1 OFDM symbol；When the work of 5G system is in low-frequency range, configuration uses the side of digital beam forming
Formula is that each user sends descending control signaling on first of subframe or the first two OFDM symbol, wherein before subframe
When sending descending control signaling in two OFDM symbols, sent on multiple PRB of frequency domain；
When configuration sends the frequency domain size of the symbol of descending control signaling, meet following condition: the frequency domain branch of configuration
The size of maximum downstream control information loads and the frequency domain under maximum polymerization grade combination is held, and supports minimum UE bandwidth；
The REG that configuration sends descending control signaling is made of a PRB of frequency domain and an OFDM symbol of time-domain；
Each CCE is made of 6 REG；Wherein, when REG is mapped to CCE with interleaving mode, 6 REG in a CCE are continuous；When
When REG is mapped to CCE in a manner of non-interwoven, 6 REG in a CCE are divided into 3 REG groups, and each REG group is by 2 REG groups
At.
As can be seen from the above technical solution, respectively for the symbol lengths for sending descending control signaling, frequency in the application
The size in domain, the composition of REG and CCE and mapping mode are configured, and can satisfy the transmission of 5G system descending control channel
Demand.
Detailed description of the invention
Fig. 1 is down control channel configuration flow schematic diagram in the embodiment of the present application；
Fig. 2 is the distribution schematic diagram of CEE and REG when 1 OFDM symbol is mapped in a manner of non-interwoven in the embodiment of the present application；
Fig. 3 is the distribution schematic diagram of CEE and REG when 1 OFDM symbol is mapped in the embodiment of the present application with interleaving mode；
Fig. 4 is the distribution schematic diagram of CEE and REG when 2 OFDM symbols are mapped in a manner of non-interwoven in the embodiment of the present application；
Fig. 5 is the distribution schematic diagram of CEE and REG when 2 OFDM symbols are mapped in the embodiment of the present application with interleaving mode；
Fig. 6 is different polymerization grade schematic diagrames in the embodiment of the present application.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
A kind of down control channel configuration method is provided in the embodiment of the present application, is applied in 5G system, respectively for hair
Send the orthogonal frequency division multiplexing (OrthogonalFrequency Division Multiplexing, OFDM) of descending control signaling
Symbol lengths, size, resource element groups (Resource Element Group, REG) and (Control of frequency domain
Channel Element, CCE) composition and mapping mode configured, can satisfy 5G system descending control channel
The demand of transmission.
With reference to the accompanying drawing, the configuration process in the embodiment of the present application to down control channel is described in detail.
It is down control channel configuration flow schematic diagram in the embodiment of the present application referring to Fig. 1, Fig. 1.Specific steps are as follows:
Step 101, when the work of 5G system is in high band, base station configuration is each use using the mode of simulation velocity of wave figuration
Family sends descending control signaling in the 1st OFDM symbol of subframe；When the work of 5G system is in low-frequency range, configuration uses number
The mode of wave beam forming is that each user sends descending control signaling on first of subframe or the first two OFDM symbol.
Wherein, it when sending descending control signaling in the first two OFDM symbol of subframe, is sent out on multiple PRB of frequency domain
It send, i.e., is sent on multiple PRB of the frequency domain across OFDM symbol, what is made is sent out on down control channel using digital beam forming
Gain is big when sending descending control signaling.
Step 102, when the frequency domain size for the symbol that base station configuration sends descending control signaling, meet following condition: matching
The frequency domain set supports the size of maximum downstream control information loads and the frequency domain under maximum polymerization grade combination, and supports most
Small UE bandwidth.
The condition met when giving the frequency domain for the symbol that configuration sends descending control signaling in this step, is actually being answered
, can be when meeting above-mentioned condition in, the size of frequency domain is configurable, is such as configurable between 5MHz to 20MHz.
Step 103, base station configuration sends the REG of descending control signaling by a PRB of frequency domain and one of time-domain
OFDM symbol composition；Each CCE is made of 6 REG；Wherein, when REG is mapped to CCE with interleaving mode, in a CCE 6
A REG is continuous；When REG is mapped to CCE in a manner of non-interwoven, a CCE is divided into 3 REG groups, and each REG group is by 2 REG
Composition.
In this step when REG is mapped to CCE with interleaving mode, a CCE is divided into 3 REG groups, and each REG group is by 2
REG composition.This division mode is capable of providing higher frequency diversity, and same group of the inside has multiple REG that can bring well
Channel estimating performance.
With reference to the accompanying drawing, it is described in detail under different mappings mode, under different number OFDM symbols between CCE and REG
Mapping relations.
When 1 OFDM symbol of use sends descending control signaling, and REG is mapped to CCE in a manner of non-interwoven, REG exists
Frequency domain by frequency from small to large in the way of sort, each CCE is arranged in frequency domain by REG ascending order, that is, 6 ascending order REG composition one
A CCE.
Referring to fig. 2, Fig. 2 is point of CEE and REG when 1 OFDM symbol is mapped in a manner of non-interwoven in the embodiment of the present application
Cloth schematic diagram.0 to 23 number-mark, 24 REG in Fig. 2 provide 4 CCE altogether, and the CCE of reference numeral from small to large is according to frequency
Size sort from small to large.
Corresponding 6 REG in each CCE in Fig. 2, the REG of reference numeral from small to large respectively frequency domain according to frequency from
It is small to sort to big sequence.
When 1 OFDM symbol of use sends descending control signaling, and REG is mapped to CCE with interleaving mode, REG is in frequency
Sequence sequence of the rate domain by frequency from small to large；It defines a virtual REG group to be made of the continuous REG that two ascending orders arrange, often
A virtual REG group nVREGWith REG group nREGAccording to preset function relational expression, such as nVREG=f (nREG) mapped, the preset function
Relational expression guarantees that virtual REG group is uniformly distributed on frequency domain；One CCE is made of the virtual REG group that 3 ascending orders arrange.
REG group refers to be physical presence for REG group, the virtual REG group of opposite definition in the embodiment of the present application.
Referring to Fig. 3, Fig. 3 is the distribution of CEE and REG when 1 OFDM symbol is mapped in the embodiment of the present application with interleaving mode
Schematic diagram.
0 to 23 number-mark, 24 REG, provide the distribution schematic diagram of one of CCE in Fig. 3.Number 0 and number 1
REG forms a virtual REG group 1, REG one virtual REG group 2 of composition of number 2 and number 3, and number 4 and 5 forms a void
Quasi- REG group 3, and REG group 1 includes the REG of number 0 and 1, REG group 2 includes the REG of number 6 and 7；REG group 3 includes 12 He of number
13 REG, then the corresponding REG group 1 of virtual REG group 1 in Fig. 3, virtual REG group 2, corresponding REG group 5, virtual REG group 3 correspond to REG group
9.By preset function relational expression, maps virtual REG group and REG, as shown in figure 3, the effect that preset function relational expression reaches is
Guarantee that virtual REG group is uniformly distributed on frequency domain.
When 2 OFDM symbols of use send descending control signalings, and REG is mapped to CCE in a manner of non-interwoven, REG is first
In sequence sequence of the frequency domain by frequency from small to large, then in the time domain temporally sequence sequence after arriving first；Each CCE according to
REG ascending order is arranged.
Referring to fig. 4, Fig. 4 is point of CEE and REG when 2 OFDM symbols are mapped in a manner of non-interwoven in the embodiment of the present application
Cloth schematic diagram.
In Fig. 4, number 0 to 47 identifies 48 REG, and the number of REG is bigger, indicates that its frequency is bigger；For CCE, number
Indicate that frequency is minimum for 0 CCE, the frequency for all REG in CCE that the frequency for the CCE that number is 1 is 0 than number is big；This
Under kind mode, for the frequency of the REG in each CCE there is no intersecting, that is, the frequency for numbering the REG for being 6, which is greater than, numbers the REG for being 5
Frequency.
When 2 OFDM symbols of use send descending control signalings, and REG is mapped to CCE with interleaving mode, REG first exists
Frequency domain sorts according to the sequence of frequency from small to large, then sorts in time domain according to sequence of the time after arriving first；Define one
Virtual REG group is made of the continuous REG that two ascending orders arranges, each virtually REG group and REG group according to preset function relational expression into
Row mapping, the functional relation guarantee that virtual REG group is uniformly distributed on frequency domain；The virtual REG that one CCE is arranged by 3 ascending orders
Group composition.
Referring to Fig. 5, Fig. 5 is the distribution of CEE and REG when 2 OFDM symbols are mapped in the embodiment of the present application with interleaving mode
Schematic diagram.
0 to 47 number-mark, 48 REG, provide the distribution schematic diagram of one of CCE in Fig. 5.All REG exist according to elder generation
Frequency domain sorts according to the sequence of frequency from small to large, then sorts in time domain according to sequence of the time after arriving first.One CCE by
The virtual REG group composition of 3 ascending order arrangements.The REG of number 0 and number 1 forms a virtual REG group 1, number 2 and number 3
REG forms a virtual REG group 2, and number 4 and 5 forms a virtual REG group 3, and REG group 1 includes the REG of number 0 and 1,
REG group 5 includes the REG of number 2 and 3；REG group 9 includes the REG of number 12 and 13, then the corresponding REG group of virtual REG group 1 in Fig. 5
1, the corresponding REG group 5 of virtual REG group 2, the corresponding REG group 9 of virtual REG group 3.Pass through preset function relational expression, maps virtual REG group
And REG, as shown in figure 5, the effect that preset function relational expression reaches is to guarantee that virtual REG group is uniformly distributed on frequency domain.
Similar to LTE, UE monitors the PDCCH candidate of multiple polymerization grades specifying search for space, so as to PDCCH
Do link level adaptation.In order to reduce blind decoding complexity, using the search space structure of classification nested type.
Using the search space structure of classification nested type, the specially time of the polymerization grade except configuration highest polymerization grade
Selecting search space is the subset in the candidate search space of highest polymerization grade.
It is different polymerization grade schematic diagrames in the embodiment of the present application referring to Fig. 6, Fig. 6.Polymerization grade is 1,2 and 4 in Fig. 6
Candidate search space is the subset in the candidate search space of polymerization grade 8.
In this way, the channel estimation results of the NR-PDCCH candidate of maximum polymerization grade can reuse to demodulate be not most
The NR-PDCCH of big polymerization grade is candidate.
In order to reduce blocking probability, NR-PDCCH candidate is not that the candidate search space of maximum polymerization grade is dedicated with UE
Form be randomized, while guarantee randomization result still with hierarchical structure map.
When specific implementation, for each user, at the beginning of the candidate search space of the polymerization grade except highest polymerization grade
When beginningization CCE coefficient, initialized in a manner of randomly selected.
It is such as empty by being randomly provided the candidate search of each polymerization grade of UE1 and UE2 for different UE still by taking Fig. 6 as an example
Between initial CCE coefficient, to reduce the blocking probability of different terminals, while guaranteeing the nested structure of classification.
In conclusion the application by respectively for send descending control signaling symbol lengths, the size of frequency domain,
The composition and mapping mode of REG and CCE is configured, and can satisfy the demand of 5G system descending control channel transmission.
Since 5G system will support different types of terminal, new down control channel is designed.This patent proposes
The OFDM symbol length and frequency domain bandwidth that 5G down control channel is supported, and give different OFDM symbol length
Under, the mapping mode of CCE to the REG of interleaved and non-interleaved.Design for search space, in order to reduce the blind decoding of terminal
Number, proposing different polymerization grades is the nested search space design method of classification, and gives the side for reducing blocking probability
Method.
It is of the invention above-mentioned to be related to considering the characteristics of 5G communication system be suitable for multiple types terminal.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (7)
1. a kind of down control channel configuration method is applied in 5G system, which is characterized in that this method comprises:
When the work of 5G system is in high band, configuration is each user at the 1st of subframe using the mode of simulation velocity of wave figuration
Descending control signaling is sent on orthogonal frequency division multiplex OFDM symbol；When the work of 5G system is in low-frequency range, configuration uses digital wave
The mode of beam figuration is that each user sends descending control signaling on first of subframe or the first two OFDM symbol, wherein
When sending descending control signaling in the first two OFDM symbol of subframe, sent on multiple Physical Resource Block PRB of frequency domain；
When configuration sends the frequency domain size of the symbol of descending control signaling, meet following condition: the frequency domain of configuration is supported most
The size of big Downlink Control Information load and the frequency domain under maximum polymerization grade combination, and support minimum user terminal UE band
It is wide；
The resource element groups REG that configuration sends descending control signaling is accorded with by a PRB of frequency domain and an OFDM of time-domain
Number composition；Each control channel Elements C CE is made of 6 REG；Wherein, when REG is mapped to CCE with interleaving mode, one
6 REG in CCE are continuous；When REG is mapped to CCE in a manner of non-interwoven, the REG in a CCE is divided into 3 REG groups,
Wherein each REG group is made of 2 continuous REG.
2. the method according to claim 1, wherein
When 1 OFDM symbol of use sends descending control signaling, and REG is mapped to CCE in a manner of non-interwoven, REG is in frequency domain
By frequency from small to large in the way of sort, each CCE is made of the continuous REG that 6 ascending orders arrange.
3. the method according to claim 1, wherein
When 1 OFDM symbol of use sends descending control signaling, and REG is mapped to CCE with interleaving mode, REG is in frequency domain
By the sequence sequence of frequency from small to large；It defines a virtual REG group to be made of the continuous REG that two ascending orders arrange, Mei Gexu
Quasi- REG group and REG group are mapped according to preset function relational expression, which guarantees virtual REG group in frequency domain
On be uniformly distributed；One CCE is made of the virtual REG group that 3 ascending orders arrange.
4. the method according to claim 1, wherein
When 2 OFDM symbols of use send descending control signalings, and REG is mapped to CCE in a manner of non-interwoven, REG is first in frequency
Sequence sequence of the rate domain by frequency from small to large, then in the time domain temporally sequence sequence after arriving first；Each CCE is by 6 ascending orders
REG composition.
5. the method according to claim 1, wherein
When 2 OFDM symbols of use send descending control signalings, and REG is mapped to CCE with interleaving mode, REG is first in frequency
Domain is sorted according to the sequence of frequency from small to large, then is sorted in time domain according to sequence of the time after arriving first；Define one virtually
REG group is made of the continuous REG that two ascending orders arrange, and each virtual REG group and REG group are reflected according to preset function relational expression
It penetrates, which guarantees that virtual REG group is uniformly distributed on frequency domain；The virtual REG group group that one CCE is arranged by 3 ascending orders
At.
6. method according to claim 1-5, which is characterized in that the method further includes:
The candidate search space of polymerization grade except highest polymerization grade is the son in the candidate search space of highest polymerization grade
Collection.
7. according to the method described in claim 6, it is characterized in that,
For each user, when the candidate search space of the polymerization grade except highest polymerization grade initializes CCE coefficient, with
Randomly selected mode is initialized.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910520968.XA CN110149195B (en) | 2017-08-30 | 2017-08-30 | Downlink control channel configuration method and device |
| CN201910521404.8A CN110324134B (en) | 2017-08-30 | 2017-08-30 | Method and device for configuring search space of downlink control channel |
| CN201710760510.2A CN109428701B (en) | 2017-08-30 | 2017-08-30 | Downlink control channel configuration method |
| CN201910521281.8A CN110190943A (en) | 2017-08-30 | 2017-08-30 | A kind of resource allocation method and device of down control channel |
| PCT/CN2017/117461 WO2019041671A1 (en) | 2017-08-30 | 2017-12-20 | Method and apparatus for configuring downlink control channel, and storage medium |
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| CN201710760510.2A CN109428701B (en) | 2017-08-30 | 2017-08-30 | Downlink control channel configuration method |
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| CN201910521281.8A Division CN110190943A (en) | 2017-08-30 | 2017-08-30 | A kind of resource allocation method and device of down control channel |
| CN201910521404.8A Division CN110324134B (en) | 2017-08-30 | 2017-08-30 | Method and device for configuring search space of downlink control channel |
| CN201910520968.XA Division CN110149195B (en) | 2017-08-30 | 2017-08-30 | Downlink control channel configuration method and device |
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| CN201710760510.2A Active CN109428701B (en) | 2017-08-30 | 2017-08-30 | Downlink control channel configuration method |
| CN201910521281.8A Pending CN110190943A (en) | 2017-08-30 | 2017-08-30 | A kind of resource allocation method and device of down control channel |
| CN201910520968.XA Active CN110149195B (en) | 2017-08-30 | 2017-08-30 | Downlink control channel configuration method and device |
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| WO2021018277A1 (en) * | 2019-07-31 | 2021-02-04 | Qualcomm Incorporated | Control resource set design for bandwidth reduced low-tier user equipment |
| WO2022061827A1 (en) * | 2020-09-27 | 2022-03-31 | 华为技术有限公司 | Beam adjustment method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113300748B (en) * | 2020-02-21 | 2022-08-02 | 大唐移动通信设备有限公司 | Beam forming device, base station and beam forming method |
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2017
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- 2017-12-20 WO PCT/CN2017/117461 patent/WO2019041671A1/en active Application Filing
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| WO2021018277A1 (en) * | 2019-07-31 | 2021-02-04 | Qualcomm Incorporated | Control resource set design for bandwidth reduced low-tier user equipment |
| WO2021016917A1 (en) * | 2019-07-31 | 2021-02-04 | Qualcomm Incorporated | Control resource set design for bandwidth reduced low-tier user equipment |
| WO2022061827A1 (en) * | 2020-09-27 | 2022-03-31 | 华为技术有限公司 | Beam adjustment method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110149195B (en) | 2021-10-08 |
| CN109428701B (en) | 2020-07-10 |
| CN110190943A (en) | 2019-08-30 |
| WO2019041671A1 (en) | 2019-03-07 |
| CN110324134A (en) | 2019-10-11 |
| CN110324134B (en) | 2021-12-10 |
| CN110149195A (en) | 2019-08-20 |
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