CN102752769B - The indicating means and device of cyclic prefix type in a kind of wireless communication system - Google Patents
The indicating means and device of cyclic prefix type in a kind of wireless communication system Download PDFInfo
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- CN102752769B CN102752769B CN201110097762.4A CN201110097762A CN102752769B CN 102752769 B CN102752769 B CN 102752769B CN 201110097762 A CN201110097762 A CN 201110097762A CN 102752769 B CN102752769 B CN 102752769B
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- basic sequence
- sequence combination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2666—Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2692—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of indicating means of CP types in wireless communication system, methods described includes：Base station is sent signal by descending synchronous signal channel, is indicated current CP types using the basic sequence combination of corresponding current CP types.The invention also discloses a kind of instruction device of CP types in wireless communication system, used basic sequence combination indicates CP types when sending signal by descending synchronous signal channel, enable the terminal to when detecting descending synchronous signal channel, CP types are known according to the combination of basic sequence in the signal of descending synchronous signal channel, detection complexity is low, the detection efficiency of CP types can be improved, and can ensure all channels can according to corresponding to configuring own channel condition CP types, so as to effectively saving channel resource.
Description
Technical field
The present invention relates to Long Term Evolution LAN (LTE-LAN, Advanced Long-Term Evolution Local
Area Network) cyclic prefix (CP, Cyclic Prefix) type in technology, more particularly to a kind of wireless communication system
Indicating means and device.
Background technology
LTE-LAN is a kind of wireless communication system being applied in WLAN, based on time division duplex (TDD, Time
Division Duplex) mode of operation, its basic frame structure as shown in figure 1, a basic frame be divided into descender, up area and
Protection band, wherein, descender is used for transmission of downlink signal, and up area is used to transmit upward signal.
When terminal accesses LTE-LAN systems, first, terminal detection descending synchronous signal channel, signal detection, automatic gain are completed
Control the work such as (AGC, Auto Gain Control) adjustment, the judgement of CP types, time synchronized and frequency offset correction；Then, eventually
End detection broadcast channel (BCH, Broadcast Channel), obtains system information, and system information includes base station or access point
The mark of (AP, Access Point), use the configuration informations such as antenna number；Finally, terminal is completed by uplink synchronous channel
Up time synchronized, complete all processes of access LTE-LAN systems.Wherein, the position of descending synchronous signal channel and broadcast channel
Put as shown in Fig. 2 descending synchronous signal channel and broadcast channel are located at the descender of basic frame, width 20MHz, descender also includes
There are other down channels.
LTE-LAN systems can support a variety of CP types, to adapt to different channel conditions.At present, existing CP types
Detection has two methods：One kind is blind Detecting, i.e., in access procedure, terminal is synchronized by attempting various CP types respectively
The transmission of information, it is that each channel can select according to channel condition the advantages of this method to detect the CP types of synchronizing channel
Corresponding CP types, shortcoming is that detection complexity is higher；Another kind is that base station notifies that terminal is currently employed by specific mode
CP types, it is not necessary to terminal carries out blind Detecting, and advantage is that detection complexity is low, but before CP types are obtained, receives respectively
The signal of channel is required for using most long CP types, can cause the waste of resource, for example, broadcast channel is just needed using fixation
Signal transmission is carried out using most long CP types.
The content of the invention
In view of this, it is a primary object of the present invention to provide in a kind of wireless communication system the indicating means of CP types and
Device, to solve the problems, such as existing CP type detections method detection complexity height and the wasting of resources.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The invention provides a kind of indicating means of CP types in wireless communication system, methods described includes：
Base station is sent signal by descending synchronous signal channel, referred to using the basic sequence combination of corresponding current CP types
Show current CP types.
In such scheme, the base station is using the basic sequence combination for corresponding to current CP types, by descending same
Walk channel and send signal to terminal, be：
When needing to send signal by descending synchronous signal channel, the base station is from the basic sequence for obtaining or being pre-configured with advance
In combination and CP type mapping tables, the basic sequence combination of the corresponding current CP types of inquiry, and according to being looked into
The basic sequence combination ask sends signal in descending synchronous signal channel to terminal.
In such scheme, the basic sequence combination in the base station using corresponding current CP types, by descending
Before synchronizing channel sends signal to terminal, methods described also includes：
Base station determines currently employed CP types according to the channel condition of current area.
In such scheme, the basic sequence combination is the finger of specified quantity, and/or given category basic sequence
Determine arrangement mode.
Present invention also offers a kind of instruction device of CP types in wireless communication system, described device includes：Instruction is single
Member, for the basic sequence combination using corresponding current CP types, signal is sent by descending synchronous signal channel, instruction is current
CP types.
In such scheme, the indicating member, including：Enquiry module and sending module；Wherein,
Enquiry module, for from the basic sequence combination that obtains or be pre-configured with advance and CP type mapping tables
In, the basic sequence combination of the corresponding current CP types of inquiry；
Sending module, for the basic sequence combination that is inquired according to the enquiry module descending synchronous signal channel to
Terminal sends signal, and current CP types are indicated to the terminal.
In such scheme, the indicating member, in addition to：Acquisition module, and/or configuration module；Wherein,
Acquisition module, for obtaining basic sequence combination and CP type mapping tables in advance；
Configuration module, for being pre-configured with basic sequence combination and CP type mapping tables；
The enquiry module, it is additionally operable to from base that the acquisition module obtains in advance, and/or that configuration module is pre-configured with
This combined sequence mode and CP type mapping tables, the basic sequence combination of the corresponding current CP types of inquiry.
In such scheme, described device also includes：Determining unit, for the channel condition according to current area, it is determined that
Currently employed CP types；
The indicating member, the basic sequence combination determined using the determining unit is additionally operable to, by descending same
Walk channel and send signal, indicate current CP types.
The indicating means and device of CP types, signal is sent by descending synchronous signal channel in the wireless communication system of the present invention
When used basic sequence combination instruction CP types so that terminal can be when detecting descending synchronous signal channel, under
The combination of basic sequence knows CP types in the signal of row synchronizing channel, and detection complexity is low, it is possible to increase CP types
Detection efficiency, and can ensure all channels can according to own channel condition configure corresponding to CP types, so as to effectively
Save channel resource.
Brief description of the drawings
Fig. 1 is the structural representation of the basic frames of LTE-LAN；
Fig. 2 is the position view of descending synchronous signal channel and broadcast channel；
Fig. 3 is the composition structural representation of CP type instruction devices in wireless communication system of the present invention；
Fig. 4 is the descending synchronous signal channel time domain beamformer of the embodiment of the present invention one；
Fig. 5 is the descending synchronous signal channel time domain beamformer of the embodiment of the present invention two.
Embodiment
The present invention basic thought be：Base station is referred to by the combination of basic sequence in descending synchronous signal channel to terminal
Show currently employed CP types so that terminal can be when detecting descending synchronous signal channel, according to basic in descending synchronous signal channel
The combination of sequence knows CP types, completes CP types and judges.
The indicating means of CP types, mainly includes in the wireless communication system of the present invention：Base station is using corresponding current CP classes
The basic sequence combination of type, signal is sent by descending synchronous signal channel, indicates CP types.
In particular it is required that when sending signal by descending synchronous signal channel, base station is basic from what is obtained or be pre-configured with advance
Combined sequence mode and the basic sequence combination in CP type mapping tables, inquiring corresponding current CP types, and press
Signal is sent to terminal in descending synchronous signal channel according to the basic sequence combination inquired, CP classes are indicated to the terminal
Type.
Here, basic sequence combination can be pre-configured in base station with CP types mapping table, or can also
Basic sequence combination and CP type mapping tables are pre-configured on other network side equipments, base station is from the net
Network side apparatus obtains basic sequence combination and CP type mapping tables.
In practical application, descending synchronous signal channel is made up of in time domain multiple, one or more basic sequences.It is described basic
Combined sequence mode can be the specified arrangement mode of specified quantity, and/or given category basic sequence.It is for example, described basic
Combined sequence mode can be the one or more among seven kinds in table 1 below, wherein, basic sequence A and basic sequence B difference
For two kinds of specified basic sequences ,-A represents a phase place to basic sequence A, be i.e. obtained after basic sequence A phase places π
The basic sequence arrived ,-B represent a phase place to basic sequence B, be i.e. obtained after basic sequence B-phase rotation π basic
Sequence phase.For example, the basic sequence combination that numbering is 1, which is the one kind for specifying 10 specified basic sequence A, specifies arrangement
Mode, the basic sequence combination that numbering is 6 are specified 10, specifying basic sequence A and basic sequence B, a kind of specify
Arrangement mode.Here, the basic sequence A specified, and/or the basic sequence B specified temporal duration can be 0.4us,
Or 0.8us or 1.6us.
| Basic sequence combination is numbered | Basic sequence combination |
| 1 | A, A, A, A, A, A, A, A, A, A |
| 2 | A, A, A, A, A, A, A, A, A ,-A |
| 3 | A ,-A, A ,-A, A ,-A, A ,-A, A ,-A |
| 4 | A ,-A, A ,-A ,-A, A ,-A, A ,-A ,-A |
| 5 | A, A, A, A ,-A |
| 6 | A, A, A, A ,-A, B, B, B, B ,-B |
| 7 | A ,-A, A ,-A ,-A, B, B, B, B ,-B |
Table 1
For example, base station is obtained ahead of time or configured basic sequence combination and CP types are one-to-one basic sequence groups
Conjunction mode and CP type mapping tables, in currently used CP Class1, base station can be with the basic sequence of corresponding CP Class1
Combination 1, signal is sent in descending synchronous signal channel；In currently used CP types 2, base station can be with corresponding CP types 2
Basic sequence combination 2, signal is sent in descending synchronous signal channel；In currently used CP types M, base station can be with corresponding CP
Type M basic sequence combination M, signal is sent in descending synchronous signal channel, wherein, M represents the species number of CP types.
Here, the basic sequence combination in the base station using corresponding current CP types, passes through descending synchronous signal channel
Before sending signal to terminal, methods described also includes：Base station determines currently employed CP according to the channel condition of current area
Type.
Here, the channel condition of the cell can include the parameters such as the delay spread of channel.
Accordingly, present invention also offers a kind of instruction device of CP types in wireless communication system, as shown in figure 1, institute
Stating device includes：Indicating member 11, for the basic sequence combination using corresponding current CP types, believed by down-going synchronous
Road sends signal, indicates current CP types.
Wherein, the indicating member 11, including：Enquiry module 111 and sending module 112；Wherein, enquiry module 111, use
In from the basic sequence combination for obtaining or being pre-configured with advance and CP type mapping tables, inquiry corresponds to current CP classes
The basic sequence combination of type；Sending module 112, for the basic sequence combination inquired according to the enquiry module 111
Mode sends signal in descending synchronous signal channel to terminal, and current CP types are indicated to the terminal.
Here, the indicating member 111 can also include：Acquisition module 113, and/or configuration module 114；Wherein, obtain
Module 113, for obtaining basic sequence combination and CP type mapping tables in advance；Configuration module 114, with 0 in advance
Configure basic sequence combination and CP type mapping tables；The enquiry module, it is additionally operable to pre- from the acquisition module 113
The basic sequence combination that first obtain, and/or configuration module 114 is pre-configured with and CP type mapping tables, inquiry pair
Should before CP types basic sequence combination.
In practical application, acquisition module 113 can the basic sequence combination is corresponding with CP types to close from being stored with
It is the network side equipment of table, obtains basic sequence combination and CP type mapping tables.
In addition, described device can also include：Determining unit 12, for the channel condition according to current area, it is determined that working as
The CP types of preceding use.Here, the indicating member 11, it is additionally operable to the basic sequence combination determined using the determining unit 12
Mode, signal is sent by descending synchronous signal channel, indicates current CP types.
Embodiment one
In the present embodiment, by 10 base station sequence A 3 kinds of combinations, 3 kinds of CP types are represented.Specifically, such as Fig. 4
It is shown, basic sequence combination one：A, A, A, A, A, A, A, A, A, A, corresponding CP Class1；Basic sequence combination two：
A ,-A, A ,-A, A ,-A, A ,-A, A ,-A, corresponding CP types 2；Basic sequence combination three：A ,-A, A ,-A ,-A, A ,-A, A ,-
A ,-A, CP types 3 are represented, wherein, basic sequence A duration is 0.8us, the synchronous letter being made up of 10 basic sequence A
Number duration is 8us.
In the present embodiment, base station indicates the process of CP types to terminal, specifically may comprise steps of：
Step 1：Above-mentioned 10 base station sequence A 3 kinds of combinations and the corresponding pass of 3 kinds of CP types are configured in base station in advance
It is table；
Step 2：Base station configures the CP types of each channel according to the channel condition of each channel；
Step 3：When needing to send signal by descending synchronous signal channel, base station inquires according to the CP types being currently configured
Basic sequence combining form corresponding to the CP types, using the basic sequence combining form inquired, believe in down-going synchronous
Road sends signal.
For example, if the CP types of base station configuration are CP types 3, base station can inquire corresponding basic sequence combination shape
Formula is above-mentioned basic sequence combining form three, then using above-mentioned basic sequence combining form three, is sent out in descending synchronous signal channel
The number of delivering letters.
In this way, terminal after the descending synchronous signal channel signal is received, parses the descending synchronous signal channel signal, obtained
To the basic sequence combining form in the descending synchronous signal channel signal, from the basic sequence combination for obtaining or being pre-configured with advance
Mode and CP type mapping tables, inquire about CP classes corresponding to basic sequence combining form in the descending synchronous signal channel signal
Type, obtain the CP types of descending synchronous signal channel.
In practical application, terminal can obtain basic sequence combination and CP type mapping tables from base station, or
It can also be obtained from other network side equipments for being stored with the basic sequence combination and CP type mapping tables, or
Basic sequence combination and CP type mapping tables can also be configured directly in the terminal.
Embodiment 2
In the present embodiment, pass through two kinds of basic sequences of base station sequence A and basic sequence B and 10 basic sequences altogether
3 kinds of combinations, represent 3 kinds of CP types.
Specifically, as shown in figure 5, basic sequence combining form one：A, A, A, A, A, A, A, A, A ,-A, represent CP Class1；
Basic sequence combining form two：A ,-A, A ,-A ,-A, B, B, B, B ,-B, represent CP types 2；Basic sequence combining form three：A,
A, A, A ,-A, B, B, B, B ,-B, CP types 3 are represented, wherein, basic sequence A and basic sequence B duration are 0.8us,
Be made up of 10, basic sequence A and basic sequence B, the synchronizing signal duration is 8us.Wherein ,-A is basic sequence A phases
Basic sequence after position rotation π ,-B are that basic sequence B-phase rotates the basic sequence after π.
In the present embodiment, the process of CP type instructions is carried out, specifically may comprise steps of：
Step 1：Base station obtains the mapping table of above-mentioned 10 base station sequence A 3 kinds of combinations and 3 kinds of CP types；
Step 2-3：It is identical with the step 2-3 in embodiment one, except that, base station is sent on descending synchronous signal channel
During signal, used basic sequence combination is 3 kinds of combinations from 10 base station sequence A and basic sequence B as shown in Figure 5
Mode, the mapping table with 3 kinds of CP types, inquiry obtain basic sequence combination used by transmission signal.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (7)
1. the indicating means of cyclic prefix (CP) type in a kind of wireless communication system, it is characterised in that methods described includes：
Base station sends signal, instruction is worked as using the basic sequence combination of corresponding current CP types by descending synchronous signal channel
Preceding CP types；
The descending synchronous signal channel is made up of in time domain multiple, one or more basic sequences；The basic sequence combination side
Formula is the specified arrangement mode of specified quantity, and/or given category basic sequence.
2. according to claim 1 in wireless communication system CP types indicating means, it is characterised in that the base station uses
The basic sequence combination of corresponding current CP types, signal is sent to terminal by descending synchronous signal channel, is：
When needing to send signal by descending synchronous signal channel, the base station is combined from the basic sequence for obtaining or being pre-configured with advance
In mode and CP type mapping tables, the basic sequence combination of the corresponding current CP types of inquiry, and according to being inquired
Basic sequence combination descending synchronous signal channel to terminal send signal.
3. according to claim 1 in wireless communication system CP types indicating means, it is characterised in that adopted in the base station
With the basic sequence combination of corresponding current CP types, before sending signal to terminal by descending synchronous signal channel, the side
Method also includes：
Base station determines currently employed CP types according to the channel condition of current area.
4. the instruction device of CP types in a kind of wireless communication system, it is characterised in that described device includes：Indicating member, use
In the basic sequence combination using corresponding current CP types, signal is sent by descending synchronous signal channel, indicates current CP classes
Type；The descending synchronous signal channel is made up of in time domain multiple, one or more basic sequences；The basic sequence combination
It is the specified arrangement mode of specified quantity, and/or given category basic sequence.
5. according to claim 4 in wireless communication system CP types instruction device, it is characterised in that the instruction is single
Member, including：Enquiry module and sending module；Wherein,
Enquiry module, for from the basic sequence combination that obtains or be pre-configured with advance with CP type mapping tables,
The basic sequence combination of the corresponding current CP types of inquiry；
Sending module, for the basic sequence combination that is inquired according to the enquiry module in descending synchronous signal channel to terminal
Signal is sent, current CP types are indicated to the terminal.
6. according to claim 5 in wireless communication system CP types instruction device, it is characterised in that the instruction is single
Member, in addition to：Acquisition module, and/or configuration module；Wherein,
Acquisition module, for obtaining basic sequence combination and CP type mapping tables in advance；
Configuration module, for being pre-configured with basic sequence combination and CP type mapping tables；
The enquiry module, it is additionally operable to from basic sequence that the acquisition module obtains in advance, and/or that configuration module is pre-configured with
Row combination and CP type mapping tables, the basic sequence combination of the corresponding current CP types of inquiry.
7. according to the instruction device of CP types in any one of claim 4 to 6 wireless communication system, it is characterised in that institute
Stating device also includes：Determining unit, for the channel condition according to current area, determine currently employed CP types；
The indicating member, the basic sequence combination determined using the determining unit is additionally operable to, is believed by down-going synchronous
Road sends signal, indicates current CP types.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110097762.4A CN102752769B (en) | 2011-04-19 | 2011-04-19 | The indicating means and device of cyclic prefix type in a kind of wireless communication system |
| PCT/CN2012/071666 WO2012142874A1 (en) | 2011-04-19 | 2012-02-27 | Method and apparatus for indicating cyclic prefix type in wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110097762.4A CN102752769B (en) | 2011-04-19 | 2011-04-19 | The indicating means and device of cyclic prefix type in a kind of wireless communication system |
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| Publication Number | Publication Date |
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| CN102752769A CN102752769A (en) | 2012-10-24 |
| CN102752769B true CN102752769B (en) | 2018-02-09 |
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| CN201110097762.4A Expired - Fee Related CN102752769B (en) | 2011-04-19 | 2011-04-19 | The indicating means and device of cyclic prefix type in a kind of wireless communication system |
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| WO (1) | WO2012142874A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3651521B1 (en) | 2013-01-18 | 2021-05-19 | Huawei Technologies Co., Ltd. | Detecting method and apparatus for common control channel |
| CN104685848A (en) * | 2013-09-29 | 2015-06-03 | 华为技术有限公司 | Information sending method and cp type determination method |
| CN106061572A (en) * | 2014-01-24 | 2016-10-26 | 华为技术有限公司 | Information transmission method, user equipment and base station |
| CN109644170B (en) | 2016-09-26 | 2021-08-03 | 华为技术有限公司 | Method, device and system for determining and sending cell parameter set |
| CN108282430B (en) * | 2017-01-05 | 2021-01-01 | 华为技术有限公司 | Method for configuring cyclic prefix CP type, terminal equipment and network equipment |
| CN109151846B (en) * | 2017-06-16 | 2020-09-11 | 华为技术有限公司 | CP type determination method, terminal device and base station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005477A (en) * | 2007-01-04 | 2007-07-25 | 中兴通讯股份有限公司 | Synchronous signal sending and detecting method for orthogonal frequency division complex system |
| WO2010145861A1 (en) * | 2009-06-19 | 2010-12-23 | Alcatel Lucent | Joint processing of uplink data in a wireless communication network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4463780B2 (en) * | 2005-06-14 | 2010-05-19 | 株式会社エヌ・ティ・ティ・ドコモ | Transmitting apparatus and transmitting method |
| CN100556195C (en) * | 2007-04-29 | 2009-10-28 | 中兴通讯股份有限公司 | The detection of time division duplexing system circulation prefix types and cell initial search method |
| CN101656700B (en) * | 2008-08-19 | 2013-03-20 | 中兴通讯股份有限公司 | Method and device for detecting cyclic prefix type during initial cell search in long-term evolution system |
| CN101729138B (en) * | 2008-10-15 | 2013-05-08 | 电信科学技术研究院 | Uplink and downlink transmission method, base station and user equipment |
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2011
- 2011-04-19 CN CN201110097762.4A patent/CN102752769B/en not_active Expired - Fee Related
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- 2012-02-27 WO PCT/CN2012/071666 patent/WO2012142874A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005477A (en) * | 2007-01-04 | 2007-07-25 | 中兴通讯股份有限公司 | Synchronous signal sending and detecting method for orthogonal frequency division complex system |
| WO2010145861A1 (en) * | 2009-06-19 | 2010-12-23 | Alcatel Lucent | Joint processing of uplink data in a wireless communication network |
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| CN102752769A (en) | 2012-10-24 |
| WO2012142874A1 (en) | 2012-10-26 |
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