CN108809451A - A kind of the determination method and network element device of search space - Google Patents
A kind of the determination method and network element device of search space Download PDFInfo
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- CN108809451A CN108809451A CN201710314104.3A CN201710314104A CN108809451A CN 108809451 A CN108809451 A CN 108809451A CN 201710314104 A CN201710314104 A CN 201710314104A CN 108809451 A CN108809451 A CN 108809451A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
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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
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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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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Abstract
The invention discloses the determination methods and network element device of a kind of search space, wherein the method includes：The pattern of user search space is determined according to user search space is strategy configuration with the strategy of whole symbols and/or symbol-by-symbol；Give the pattern notification of the user search space to user equipment (UE).
Description
Technical field
The present invention relates to the determination methods and network element of the technology of radio-interface physical layer more particularly to a kind of search space to set
It is standby.
Background technology
Physical Downlink Control Channel (PDCCH) may be used to indicate the Physical Downlink Shared Channel corresponding to user equipment (UE)
(PDSCH) running time-frequency resource and configured transmission for Physical Uplink Shared Channel (PUSCH) scheduling dispatched or will sent.It obtains
These message, UE need first it is detected that PDCCH, LTE use the PDCCH that the mode of blind Detecting allows UE to obtain oneself, but
It is that control area occupies whole bandwidth on frequency domain, for conventional subframe, preceding 3 or 4 orthogonal frequency division multiplexings is occupied in time domain
With (OFDM) symbol.If completely carrying out blind Detecting, larger complexity can be brought to UE, needs longer processing time.
Search space effectively reduces the range of blind Detecting, it defines some resource locations, and the PDCCH of UE is made to be only possible to appear in this
On a little limited resource locations, to reduce the range of blind Detecting, UE is contributed to improve PDCCH detection efficiencies, reduce terminal
Complexity.
All CCE that can be used for PDCCH transmission for the control area (first 3 or 4 OFDM symbols) of subframe k are compiled
Number, from 0 to NCCE,k- 1, later according to the blind Detecting of the different polymerization grades of protocol definition searched space and carry out control channel, gather
M-th of candidate for closing the search space that grade is L is defined as：
Wherein, m=0 ..., M(L)- 1, M(L)For the number for the candidate that the search space for being L for given polymerization grade includes,
As shown in table 1 below.YkIt is the initial position of search space, for public search space, value 0；For UE specific's
Search space is and UE ID and the relevant parameter of timeslot number.
Table 1
In 5G NR designs, to consider that multiple business is supported to coexist, existing enhancing mobile broadband (eMBB) business, to gulping down
The amount of spitting demand is more demanding, but of less demanding to time delay；Also there are ultrahigh reliability and ultralow time delay business (URLLC) business, it is right
Delay requirement is higher；Also there is the application of height frequency range simultaneously.Therefore it needs to carry out in the testing process of control channel corresponding
Consider.
The transfer resource of current control channel channel resource set (CORESET, control resource in order to control
Set), the parameter of different CORESET is by system configuration, for example the different CORESET of the running time-frequency resource configured can be different, control
Channel processed transmits etc. in CORESET.
It is using problem of the existing technology：In the determination of the search spaces LTE, need all control areas
After OFDM symbol transmission determines all CCE after finishing receiving, the search of control channel could be carried out.But this mode
The relatively high business of delay requirement can not be supported preferably, therefore, including the design of present control channel considers to support
The preferential control channel mapping of frequency domain enables to detect certain candidate numbers on first symbol
(candidate).But how to determine the distribution of search space there is no specific schemes.
Invention content
In view of this, the embodiment of the present invention is desirable to provide a kind of the determination method and network element device of search space, at least solve
It has determined problem of the existing technology.
A kind of determination method of search space of the embodiment of the present invention, the method includes：
Determine that user searches for according to user search space is strategy configuration with the strategy of whole symbols and/or symbol-by-symbol
The pattern in space；
Give the pattern notification of the user search space to user equipment (UE).
In said program, by the pattern notification of the user search space to UE, including：
The pattern of the user search space is notified in the form of control channel resource collection CORESET parameters to UE.
In said program, the method further includes：
When being configured to the CORESET, the pattern for the user search space that the CORESET is supported is configured.
In said program, by the pattern notification of the user search space to UE, including：
Give the pattern notification of the user search spaces supported the UE to the UE.
In said program, the pattern of user search space is determined according to the strategy of whole symbols, including：
With more symbols in the CORESET or all control channels in whole orthogonal frequency division multiplex OFDM symbols
Unit CCE numbers are parameter, determine the user search space.
In said program, the pattern of user search space is determined according to the strategy symbol-by-symbol, including：
Using the CCE numbers in OFDM symbol determine the user search space as parameter one by one in the CORESET.
In said program, the initial position of user search space exists in the different OFDM symbols of the same CORESET
Offset.
In said program, the method further includes：
It will be between different OFDM symbols of the candidate candidate of user search space in control channel resource region
It is divided；
The dividing mode of user search space is notified to UE.
In said program, the method further includes：
In the case of determining the user search space according to the strategy symbol-by-symbol, the polymerization grade of same user
Candidate candidate divided in different OFDM symbols；
The dividing mode of user search space is notified to UE.
In said program, the dividing mode of user search space is notified to UE, including：
Indicate the candidate candidate of its search space UE between different OFDM symbols by semi-static signaling
Dividing mode.Wherein, division proportion belongs to the scope of dividing mode.
In said program, the dividing mode of user search space is notified to UE, including：It is notified with preset configuration rule
To UE, under configuration rule, dividing modes of the candidate candidate between multiple OFDM symbols is fixed or dynamic change.
A kind of network element device of the embodiment of the present invention, the network element device include：
Determination unit, for according to user search space be with the strategy of whole symbols and/or symbol-by-symbol strategy configure
To determine the pattern of user search space；
Notification unit, for giving the pattern notification of the user search space to user equipment (UE).
In said program, the notification unit is further used for：
The pattern of the user search space is notified in the form of control channel resource collection CORESET parameters to UE.
In said program, the network element device further includes：
Dispensing unit when for being configured to the CORESET, configuring the user that the CORESET is supported and searching
The pattern in rope space.
In said program, the notification unit is further used for：
Give the pattern notification of the user search spaces supported the UE to the UE.
In said program, the determination unit is further used for：
With more symbols in the CORESET or all control channels in whole orthogonal frequency division multiplex OFDM symbols
Unit CCE numbers are parameter, determine the user search space.
In said program, the determination unit is further used for：
Using the CCE numbers in OFDM symbol determine the user search space as parameter one by one in the CORESET.
In said program, the network element device further includes：
Processing unit is used for：
There is offset in the different OFDM symbols of the same CORESET in the initial position of user search space.
In said program, the network element device further includes：
Processing unit is used for：
It will be between different OFDM symbols of the candidate candidate of user search space in control channel resource region
It is divided；
The dividing mode of user search space is notified to UE.
In said program, the network element device further includes：
Processing unit is used for：
In the case of determining the user search space according to the strategy symbol-by-symbol, the polymerization grade of same user
Candidate candidate divided in different OFDM symbols；
The dividing mode of user search space is notified to UE.
In said program, the processing unit is further used for：
Indicate the candidate candidate of its search space UE between different OFDM symbols by semi-static signaling
Dividing mode.Wherein, division proportion belongs to the scope of dividing mode.
In said program, the processing unit is further used for：
The dividing mode of user search space is notified with preset configuration rule to UE, under configuration rule, candidate
Dividing modes of the candidate between multiple OFDM symbols is fixed or dynamic change.
The determination method of the search space of the embodiment of the present invention includes：It is with the plan of whole symbols according to user search space
Strategy slightly and/or symbol-by-symbol configures to determine the pattern of user search space；By the pattern notification of the user search space
To UE.
Using the embodiment of the present invention, it is determined that the concrete scheme of the distribution of search space, by designing searching for control channel
Rope space type can preferably support the control channel detection demand of various businesses, improve the detection speed of control channel, drop
Low user's complexity.
Description of the drawings
Fig. 1 is one method implementation flow chart of the embodiment of the present invention；
Fig. 2 is the schematic diagram configured using one search space of the embodiment of the present invention；
Fig. 3 is the schematic diagram using the another search space configuration of the embodiment of the present invention.
Specific implementation mode
The implementation of technical solution is described in further detail below in conjunction with the accompanying drawings.
The determination method of the search space of the embodiment of the present invention, as shown in Figure 1, including：
Step 101 is determined according to user search space is strategy configuration with the strategy of whole symbols and/or symbol-by-symbol
The pattern of user search space；
Step 102, by the pattern notification of the user search space to UE.
Here, by the pattern notification of the user search space to UE, including two kinds of situations.1) network element device of base station side
It is configured for CORESET, later, is notified to UE with CORESET parametric forms.Specifically, when being configured to CORESET,
Configure the pattern for the user search space that the CORESET is supported.By the pattern of the user search space with CORESET
The form of parameter is notified to UE.2) network element device of base station side is that UE with postponing, notify to UE.Specifically, described in configuration
The pattern for the user search space that UE is supported simultaneously is notified to UE.
The determination method of the search space of the embodiment of the present invention, the network element device for being base station side are that CORESET is configured.
The method includes：Strategy according to the strategy of whole symbols and/or symbol-by-symbol determines the pattern of user search space；It is right
When CORESET is configured, the pattern for the user search space that the CORESET is supported is configured.
Using the embodiment of the present invention, in the determination of search space, strategy there are two types of the patterns of user search space is determined,
A kind of strategy is the pattern that user search space is determined according to the strategy of whole symbols；Another strategy is according to plan symbol-by-symbol
Slightly determine the pattern of user search space.Later, so that it may to be controlled according to the pattern of the user search space of configuration
The search of channel.It is to be configured to CORESET, while configuring institute during the pattern of the user search space of configuration
State the pattern of the user search space of CORESET supports.Due to using different strategies, obtains different users and search for sky
Between pattern, can support different business demands, for example, eMBB business, more demanding to throughput demand, but time delay be wanted
Ask not high, for example, URLLC business, more demanding to time delay, while also having the application of height frequency range, through the embodiment of the present invention
It determines and the different user search space type of configuration, it can be to support that these business demands have all been compared.By setting
The search space type for counting control channel can preferably support the control channel detection demand of various businesses, improve control letter
The detection speed in road reduces user's complexity.
In one embodiment of the embodiment of the present invention, user search space is determined according to the strategy of whole symbols
Pattern, including：Using more symbols in the CORESET or all CCE numbers in whole OFDM symbols as parameter, determine
The user search space.
Here, for " CCE ", it is commonly referred to as CCE in LTE scenes, NR-CCE is properly termed as in other scenes, this
The description of the specific name is not limited in inventive embodiments." CCE " in the embodiment of the present invention is only used for indicating control channel
Unit, full name in English are control resource element, the RE numbers for including with specific control channel.
In one embodiment of the embodiment of the present invention, the mould of user search space is determined according to the strategy symbol-by-symbol
Formula, including：Using the CCE numbers in OFDM symbol determine the user search space as parameter one by one in the CORESET.
In one embodiment of the embodiment of the present invention, when the CORESET is one, the method further includes：According to
Currently with the presence or absence of ultrahigh reliability and ultralow time delay service URL LC business, to determine to configure the mould of the user search space
Formula.
In one embodiment of the embodiment of the present invention, the method further includes：When the strategy according to symbol-by-symbol is come really
In the case of the fixed user search space, the initial position for configuring user search space in different OFDM symbols is different.
In one embodiment of the embodiment of the present invention, the method further includes：The initial position of user search space, same
It can be differed in the different OFDM symbols of one CORESET.That is, the initial position of user search space, same
May exist certain offset in the different OFDM symbols of a CORESET, deviant can be 0, and deviant may include positively biased
Shifting and negative offset.
In one embodiment of the embodiment of the present invention, the method further includes：User search space is provided in control channel
It is divided between different OFDM symbols in source region；The dividing mode of user search space is led in a manner of explicit instruction
Know to UE, or by predefined rule notice to UE.
In one embodiment of the embodiment of the present invention, the method further includes：When the strategy according to symbol-by-symbol is come really
In the case of the fixed user search space, the different candidate of the polymerization grade of same user can be in different OFDM
It is divided on symbol；The dividing mode of user search space is notified in a manner of explicit instruction to UE, or is matched with preset
Rule notice is set to UE.
It is described to be notified in a manner of explicit instruction to UE in one embodiment of the embodiment of the present invention, including：By semi-static
Signaling instruction, for different types of UE distribute the candidate of its user search space between different OFDM symbols into
Row distribution.Specifically, including：1) to the candidate of each polymerization grade, the control channel resource for being distributed evenly over user accounts for
In each OFDM symbol；And/or 2) more the candidate of the non-low time delay user of configuration distribution user control
In non-first OFDM symbol of channel resource region；And/or 3) all candidate of configuration low latency user is located at the
On one OS.By way of example only, the mode of division is not limited to the example above to above-mentioned dividing mode.
It is described to be notified to UE with preset configuration rule in one embodiment of the embodiment of the present invention, including：According to institute
Strategy symbol-by-symbol is stated in the case of determining the user search space, directly to configure different types of UE and be accorded in multiple OFDM
Dividing mode between number and/or ratio.
It is described to be notified to UE with preset configuration rule in one embodiment of the embodiment of the present invention, including：Dynamic configuration
Divisions of the candidate in the OFDM symbol in user's control channel region.Specifically, 1) dynamically determine all
Candidate is located in the nth symbol in control channel region, and the n values being likely located in different slot are different；With/
Or, 2) dynamically divide the ratio of candidate between the OFDM symbol in control channel region；And/or 3) dynamically adjust
Positions of the whole candidate in search space.For smaller polymerization grade, its phase relative to maximum polymerization grade is adjusted
To position.By way of example only, the mode of division is not limited to the example above to above-mentioned dividing mode.
A kind of determination method of search space of the embodiment of the present invention, the network element device for being base station side are that UE is configured.
Specifically, the method includes：Strategy according to the strategy of whole symbols and/or symbol-by-symbol determines the mould of user search space
Formula；Configure the pattern for the user search space that the UE is supported.
In one embodiment of the embodiment of the present invention, user search space is determined according to the strategy of whole symbols
Pattern, including：Using more symbols in the CORESET or all CCE numbers in whole OFDM symbols as parameter, determine
The pattern of the user search space.
In one embodiment of the embodiment of the present invention, the mould of user search space is determined according to the strategy symbol-by-symbol
Formula, including：Using the CCE numbers in OFDM symbol determine the mould of the user search space as parameter one by one in the CORESET
Formula.
In one embodiment of the embodiment of the present invention, the method further includes：The mould of the different user search spaces
Formula is located inside the same CORESET, configures the UE and is carried out accordingly according to its corresponding user search space type
Control channel detects.
In one embodiment of the embodiment of the present invention, when the CORESET is one, the method further includes：According to
Currently with the presence or absence of ultrahigh reliability and ultralow time delay service URL LC business, to determine to configure the mould of the user search space
Formula.
In one embodiment of the embodiment of the present invention, the method further includes：When the strategy according to symbol-by-symbol is come really
In the case of the fixed user search space, the initial position for configuring user search space in different OFDM symbols is different.
In one embodiment of the embodiment of the present invention, the method further includes：The initial position of user search space, same
It is that can differ in the different OFDM symbols of one CORESET.That is, the initial position of user search space, same
May exist certain offset in the different OFDM symbols of one CORESET, deviant can be 0, and deviant may include just
Offset and negative offset.
In one embodiment of the embodiment of the present invention, the method further includes：User search space is provided in control channel
It is divided between different OFDM symbols in source region；The dividing mode of user search space is led in a manner of explicit instruction
Know to UE, or by predefined rule notice to UE.
In one embodiment of the embodiment of the present invention, the method further includes：When the strategy according to symbol-by-symbol is come really
In the case of the fixed user search space, the different candidate number candidate of the polymerization grade of same user can be not
It is divided in same OFDM symbol；The dividing mode of user search space is notified in a manner of explicit instruction to UE, or with
Preset configuration rule is notified to UE.
It is described to be notified in a manner of explicit instruction to UE in one embodiment of the embodiment of the present invention, including：By semi-static
Signaling instruction, for different types of UE distribute the candidate of its user search space between different OFDM symbols into
Row distribution.Specifically, including：1) to the candidate of each polymerization grade, the control channel resource for being distributed evenly over user accounts for
In each OFDM symbol；And/or 2) more the candidate of the non-low time delay user of configuration distribution user control
In non-first OFDM symbol of channel resource region；And/or 3) all candidate of configuration low latency user is located at the
On one OS.
It is described to be notified to UE with preset configuration rule in one embodiment of the embodiment of the present invention, including：According to institute
Strategy symbol-by-symbol is stated in the case of determining the user search space, directly to configure different types of UE and be accorded in multiple OFDM
Dividing mode between number and/or ratio.
It is described to be notified to UE with preset configuration rule in one embodiment of the embodiment of the present invention, including：Dynamic configuration
Divisions of the candidate in the OFDM symbol in user's control channel region.Specifically, 1) dynamically determine all
Candidate is located in the nth symbol in control channel region, and the n values being likely located in different slot are different；With/
Or, 2) dynamically divide the ratio of candidate between the OFDM symbol in control channel region；And/or 3) dynamically adjust
Positions of the whole candidate in search space.For smaller polymerization grade, its phase relative to maximum polymerization grade is adjusted
To position.
A kind of network element device of the embodiment of the present invention, the network element device include：Determination unit, for being searched for according to user
Space is strategy configuration with the strategy of whole symbols and/or symbol-by-symbol to determine the pattern of user search space；Notification unit,
For giving the pattern notification of the user search space to user equipment (UE).Notification unit has 2 kinds of specific implementations：1) notification sheet
Member is further used for：When being configured to CORESET, while configuring the user search space that the CORESET is supported
Pattern；The pattern of the user search space is notified in the form of CORESET parameters to UE；2) notification unit is further used
In：The pattern for the user search space that the UE is supported is configured, and is notified to UE.
A kind of network element device of the embodiment of the present invention, in the case of configuring user search space for CORESET, the network element
Equipment includes：Determination unit determines user search space for strategy according to the strategy of whole symbols and/or symbol-by-symbol
Pattern；Dispensing unit when for being configured to control channel resource collection CORESET, configures the institute that the CORESET is supported
State the pattern of user search space.
In one embodiment of the embodiment of the present invention, the determination unit is further used for：With in the CORESET
All control channel unit CCE numbers in more symbols or whole orthogonal frequency division multiplex OFDM symbols are parameter, determine institute
State user search space.
In one embodiment of the embodiment of the present invention, the determination unit is further used for：With in the CORESET by
CCE numbers in a OFDM symbol are parameter, determine the user search space.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：When described
When CORESET is one, according to currently whether there is ultrahigh reliability and ultralow time delay service URL LC business, to determine to configure
The pattern of the user search space.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：When according to institute
Strategy symbol-by-symbol is stated in the case of determining the user search space, to configure user search space in different OFDM symbols
Initial position is different.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is searched for empty for user
Between initial position, can be differed in the different OFDM symbols of the same CORESET.That is, user search space
Initial position, in the different OFDM symbols of the same CORESET may exist certain offset, deviant can be 0, partially
Shifting value may include positive offset and negative offset.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit, for searching for user
Space is divided between the different OFDM symbols in control channel resource region；By the dividing mode of user search space
It is notified in a manner of explicit instruction to UE, or by predefined rule notice to UE.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：When according to institute
Strategy symbol-by-symbol is stated come in the case of determining the user search space, the different candidate numbers of the polymerization grade of same user
Candidate can be divided in different OFDM symbols；By the dividing mode of user search space with explicit instruction side
Formula is notified to UE, or is notified to UE with preset configuration rule.
In one embodiment of the embodiment of the present invention, the processing unit is further used for：Referred to by semi-static signaling
Show, the candidate that its user search space is distributed for different types of UE is allocated between different OFDM symbols.
In one embodiment of the embodiment of the present invention, the processing unit is further used for：Described in basis symbol-by-symbol
Strategy in the case of determining the user search space, directly configures different types of UE drawing between multiple OFDM symbols
Divide mode and/or ratio.
In one embodiment of the embodiment of the present invention, the processing unit is further used for：Dynamic configuration candidate
The division in OFDM symbol in user's control channel region.
A kind of network element device of the embodiment of the present invention, in the case of configuring user search space for UE, the network element device
Including：Determination unit determines the mould of user search space for strategy according to the strategy of whole symbols and/or symbol-by-symbol
Formula；Dispensing unit, the pattern for configuring the user search space that the UE is supported.
In one embodiment of the embodiment of the present invention, the determination unit is further used for：With in the CORESET
All control channel unit CCE numbers in more symbols or whole orthogonal frequency division multiplex OFDM symbols are parameter, determine institute
State the pattern of user search space.
In one embodiment of the embodiment of the present invention, the determination unit is further used for：With in the CORESET by
CCE numbers in a OFDM symbol are parameter, determine the pattern of the user search space.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：Different institutes
The pattern of user search space is stated, is located inside the same CORESET, the UE is configured and is searched for according to its corresponding user
Space type carries out corresponding control channel detection.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：According to current
With the presence or absence of ultrahigh reliability and ultralow time delay service URL LC business, to determine to configure the pattern of the user search space.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：When according to institute
Strategy symbol-by-symbol is stated in the case of determining the user search space, to configure user search space in different OFDM symbols
Initial position is different.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：User searches for
The initial position in space is different in the different OFDM symbols of the same CORESET.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：User is searched
Rope space is divided between the different OFDM symbols in control channel resource region；
The dividing mode of user search space is notified in a manner of explicit instruction to UE, or logical by predefined rule
Know to UE.
In one embodiment of the embodiment of the present invention, the network element device further includes：Processing unit is used for：When according to institute
Strategy symbol-by-symbol is stated come in the case of determining the user search space, the different candidate numbers of the polymerization grade of same user
Candidate can be divided in different OFDM symbols；By the dividing mode of user search space with explicit instruction side
Formula is notified to UE, or is notified to UE with preset configuration rule.
In one embodiment of the embodiment of the present invention, the processing unit is further used for：Referred to by semi-static signaling
Show, the candidate that its user search space is distributed for different types of UE is allocated between different OFDM symbols.
In one embodiment of the embodiment of the present invention, the processing unit is further used for：Described in basis symbol-by-symbol
Strategy in the case of determining the user search space, directly configures different types of UE drawing between multiple OFDM symbols
Divide mode and/or ratio.
In one embodiment of the embodiment of the present invention, the processing unit is further used for：Dynamic configuration candidate
The division in OFDM symbol in user's control channel region.
The embodiment of the present invention is described below by taking a practical application scene as an example：
When carrying out CORESET configurations, at the same configure CORESET support search space type, type may include as
Under：
● the determination of search space is based on more symbols in CORESET or all CCE in whole OFDM symbols
Number is what parameter determined；
● the determination of search space is based on the CCE numbers in symbol are that parameter is determined one by one in CORESET；
Such as the control channel search space of existing LTE is all based on control area (first 3 or 4 OFDM symbols)
The CCE that can be used for PDCCH transmission is numbered, from 0 to NCCE,k- 1, then it is based on NCCE,kDetermine search space.If symbol-by-symbol
It determines search space, is then that search space is determined based on the number of the CCE for including in each symbol.
In this way when the control channel of the UE of different business demand is transmitted in different control resource set,
The CORESET of control channel for transmitting URLLC business can configure its search space and be determined symbol-by-symbol, for
It is portion's symbol conduct when being based on full CORESET that the CORESET of the control channel of transmission eMBB business, which can configure its search space,
It is determined entirely by search space.
When only there are one CORESET when, can according to currently with the presence or absence of URLLC business determine configure its type.
Noted earlier is to configure search space parameter for CORESET, and another realization method can also be to be configured not by UE
With search space type, two types as elucidated before, in this case different search space types be likely located at together
Inside one CORESET, UE carries out corresponding control channel detection according to its corresponding search space type.
No matter, can when determining search space symbol-by-symbol for configuring the mode of search space based on CORESET or UE
It is different with the initial position for configuring user search space on distinct symbols, different Y is corresponded to similar to different OFDM symbolsk。
Such as indexing parameter (such as the index in time slot, or the rope in control channel region of OFDM symbol can be introduced
Draw), the number of other parameters such as current time slots, the number of control channel resource collection, User ID etc.；It can reach in this way
Effect be in the different OFDM symbols of the same control channel region, the initial position of control channel search space is different
, the probability of user's search space initial position all same in all OFDM symbols is reduced, benefit is further to drop
The probability that low UE control channels are mutually blocked.
For example, can be that different symbols introduces the biasing of search space initial position,
NCCEperOS,kIt is NR-CCE number inside CORESET in each OFDM symbol, nOS,kIt is OFDM inside CORESET
The index of symbol, number can be 0~(Nset-1).NsetIt is the OFDM symbol number in CORESET.nRNTIIt is the RNTI of user
Value, L are polymerization grades, and i values are 0~L-1, are specifically defined flow portion of visible the 9th chapters of 3GPP TS36.213 about PDCCH
Point.
When determining search space symbol-by-symbol, the different candidate of the polymerization grade of same user can be different
It is divided on symbol, the notice that the dividing mode of search space can be explicit is informed to UE or by predefined rule
UE；
The method of explicit instruction can be indicated by semi-static signaling, such as RRC signaling, be different types of UE points
Distribution of the candidate with its search space between different symbols；
Such as to the candidate of each polymerization grade, it is distributed evenly over each of control channel resource occupation of user
In OFDM symbol.The schematic diagram of average division is illustrated in figure 2, in Fig. 2, it is assumed that the candidate numbers of polymerization grade 1,2,4,8
Mesh is respectively 6,6,2,2, identical as LTE, then averagely divides candidate on two symbols.
Such as configure the more distribution of candidate of non-low time delay user user control channel resource region it is non-
In first OFDM symbol, low delay user is given to reserve the search space on more first symbol；
Such as low latency user, its all candidate is configured on first OS；
It can be directly defined on by predefined rule in the case of determining search space symbol-by-symbol, different types of end
Hold dividing mode and the ratio etc. between multiple symbols.
Certain dynamic OFDM symbol for determining candidate in user's control channel region of rule can also be passed through
On division；Division on the ofdm symbols is determined by function of RNTI and slot, can realize following division result：
Dynamically determine that all candidate are located in the nth symbol in control channel region；Different
The n values being likely located in slot are different
The ratio of candidate is dynamically divided between the OFDM symbol in control channel region：
It is to transmit to own in first symbol in time slot n if the control channel region of UE includes two OFDM symbols
The 1/3 of candidate transmits the 2/3 of all candidate on second symbol；It is to be transmitted in first symbol in time slot n+1
The 2/3 of all candidate transmits the 1/3 of all candidate on second symbol；
Such as it is to transmit the 1/3 of all candidate in first symbol in time slot n；It is first symbol in time slot n+1
The 1/2 of middle all candidate of transmission；
Positions of the dynamic adjustment Candidate in search space；
For smaller polymerization grade, its relative position relative to maximum polymerization grade is adjusted；Such as two symbols
The positions candidate are arranged since the initial position of maximum polymerization grade search space, as shown on the left side of figure 3；Or two
There are certain offset in the positions candidate of symbol compared to maximum polymerization grade search space, as shown in the right sides Fig. 3.
The benefit that can be realized in this way is, when being respectively positioned in first OFDM symbol, supports low latency.When user is not
When having candidate distributions in same OFDM symbol, user receives first OFDM symbol and can be carried out control channel
Blind examination can reduce control channel if detecting control channel without the detection of the control channel on successive character
The power consumption and time delay of detection.
In addition, the candidate divisions for carrying out UE specific can also reduce user search space and rise to a certain extent
Obstruction when beginning position is identical.
If the module integrated described in the embodiment of the present invention is realized in the form of software function module and as independent production
Product are sold or in use, can also be stored in a computer read/write memory medium.Based on this understanding, the present invention is real
Applying the technical solution of example, substantially the part that contributes to existing technology can embody in the form of software products in other words
Come, which is stored in a storage medium, including some instructions are used so that a computer equipment (can
To be personal computer, server or network equipment etc.) execute the whole or portion of each embodiment the method for the present invention
Point.And storage medium above-mentioned includes：USB flash disk, read-only memory (ROM, Read-Only Memory), is deposited mobile hard disk at random
The various media that can store program code such as access to memory (RAM, Random Access Memory), magnetic disc or CD.
It is combined in this way, the embodiment of the present invention is not limited to any specific hardware and software.
Correspondingly, the embodiment of the present invention also provides a kind of computer storage media, wherein it is stored with computer program, the meter
Calculation machine program is used to execute the determination method of the search space of the embodiment of the present invention.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (22)
1. a kind of determination method of search space, which is characterized in that the method includes：
User search space is determined according to user search space is strategy configuration with the strategy of whole symbols and/or symbol-by-symbol
Pattern；
Give the pattern notification of the user search space to user equipment (UE).
2. according to the method described in claim 1, it is characterized in that, by the pattern notification of the user search space to UE, packet
It includes：
The pattern of the user search space is notified in the form of control channel resource collection CORESET parameters to UE.
3. according to the method described in claim 2, it is characterized in that, the method further includes：
When being configured to the CORESET, the pattern for the user search space that the CORESET is supported is configured.
4. according to the method described in claim 1, it is characterized in that, by the pattern notification of the user search space to UE, packet
It includes：
Give the pattern notification of the user search spaces supported the UE to the UE.
5. method according to any one of claims 1 to 4, which is characterized in that according to the strategy of whole symbols come really
Determine the pattern of user search space, including：
With more symbols in the CORESET or all control channel units in whole orthogonal frequency division multiplex OFDM symbols
CCE numbers are parameter, determine the user search space.
6. method according to any one of claims 1 to 4, which is characterized in that determined according to the strategy symbol-by-symbol
The pattern of user search space, including：
Using the CCE numbers in OFDM symbol determine the user search space as parameter one by one in the CORESET.
7. method according to any one of claims 1 to 4, which is characterized in that
There is offset in the different OFDM symbols of the same CORESET in the initial position of user search space.
8. method according to any one of claims 1 to 4, which is characterized in that the method further includes：
It will be carried out between different OFDM symbols of the candidate candidate of user search space in control channel resource region
It divides；
The dividing mode of user search space is notified to UE.
9. method according to any one of claims 1 to 4, which is characterized in that the method further includes：
In the case of determining the user search space according to the strategy symbol-by-symbol, the marquis of the polymerization grade of same user
Candidate is selected to be divided in different OFDM symbols；
The dividing mode of user search space is notified to UE.
10. according to the method described in claim 8, it is characterized in that, the dividing mode of user search space is notified to UE, packet
It includes：
Divisions of the candidate candidate of its search space UE between different OFDM symbols is indicated by semi-static signaling
Mode.
11. according to the method described in claim 8, it is characterized in that, the dividing mode of user search space is notified to UE, packet
It includes：It is notified to UE with preset configuration rule, under configuration rule, candidate candidate drawing between multiple OFDM symbols
Point mode is fixed or dynamic change.
12. a kind of network element device, which is characterized in that the network element device includes：
Determination unit, it is true for being that strategy configuration with the strategy of whole symbols and/or symbol-by-symbol comes according to user search space
Determine the pattern of user search space；
Notification unit, for giving the pattern notification of the user search space to user equipment (UE).
13. network element device according to claim 12, which is characterized in that the notification unit is further used for：
The pattern of the user search space is notified in the form of control channel resource collection CORESET parameters to UE.
14. network element device according to claim 13, which is characterized in that the network element device further includes：
Dispensing unit when for being configured to the CORESET, configuring the user that the CORESET is supported and searching for sky
Between pattern.
15. network element device according to claim 12, which is characterized in that the notification unit is further used for：
Give the pattern notification of the user search spaces supported the UE to the UE.
16. according to claim 12 to 15 any one of them network element device, which is characterized in that the determination unit, further
For：
With more symbols in the CORESET or all control channel units in whole orthogonal frequency division multiplex OFDM symbols
CCE numbers are parameter, determine the user search space.
17. according to claim 12 to 15 any one of them network element device, which is characterized in that the determination unit, further
For：
Using the CCE numbers in OFDM symbol determine the user search space as parameter one by one in the CORESET.
18. according to claim 12 to 15 any one of them network element device, which is characterized in that the network element device further includes：
Processing unit is used for：
There is offset in the different OFDM symbols of the same CORESET in the initial position of user search space.
19. according to claim 12 to 15 any one of them network element device, which is characterized in that the network element device further includes：
Processing unit is used for：
It will be carried out between different OFDM symbols of the candidate candidate of user search space in control channel resource region
It divides；
The dividing mode of user search space is notified to UE.
20. according to claim 12 to 15 any one of them network element device, which is characterized in that the network element device further includes：
Processing unit is used for：
In the case of determining the user search space according to the strategy symbol-by-symbol, the marquis of the polymerization grade of same user
Candidate is selected to be divided in different OFDM symbols；
The dividing mode of user search space is notified to UE.
21. network element device according to claim 19, which is characterized in that the processing unit is further used for：
Divisions of the candidate candidate of its search space UE between different OFDM symbols is indicated by semi-static signaling
Mode.
22. network element device according to claim 19, which is characterized in that the processing unit is further used for：
The dividing mode of user search space is notified with preset configuration rule to UE, under configuration rule, candidate
Dividing modes of the candidate between multiple OFDM symbols is fixed or dynamic change.
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