CN102624441A - Transmission method and sending station - Google Patents
Transmission method and sending station Download PDFInfo
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- CN102624441A CN102624441A CN2011100336697A CN201110033669A CN102624441A CN 102624441 A CN102624441 A CN 102624441A CN 2011100336697 A CN2011100336697 A CN 2011100336697A CN 201110033669 A CN201110033669 A CN 201110033669A CN 102624441 A CN102624441 A CN 102624441A
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Abstract
The invention provides a transmission method and a sending station which are used in LTE-LAN (long term evolution-local area networks) environment. The method which is used in the LTE-LAN comprises the following steps that: the sending station configures a subframe as a subframe structure based on a standard cycle prefix according to a number of emission antenna ports; and then a corresponding pilot frequency is sent on the configured subframe. By using the method and the sending station of the invention, a problem of nomadic/local wireless data access can be solved, cost of an original system can be reduced and optimized so as to further increase throughput of the system and satisfy a demand of a data user with rapid development.
Description
Technical field
The present invention relates to digital communicating field; Particularly relate to 3GPP (The 3rd GenerationPartnership Project; Third generation partner program) transmission method and dispatching station during indoor, the focus of LTE (Long Term Evolution, Long Term Evolution) covers.
Background technology
Along with popularizing of mobile Internet (Mobile Internet) and smart mobile phone, the mobile data traffic demand rapidly increases.According to authoritative institution's prediction, in following 10 years, the mobile data services amount is also doubled every year, will increase by 1,000 times in 10 years.
The data service ratio increases gradually in the carrier network, and it is professional to have influenced the conventional telecommunications level, and still, because data service is according to charge on traffic, its profit growth rate and flow load are not directly proportional.In addition, the data service that increases has fast proposed severe challenge to the transmittability of mobile communications network.Most mobile data services mainly occur in indoor and the focus environment, are presented as that nomadic/local wireless inserts scene.Because to demand indoor, the focus soverlay technique, the LTE focus covers the focus that has become discussion gradually, can use LTE-LAN (LTE-Local Area Networks, LTE-local area network (LAN)) to call this technology usually.According to statistics, at present nearly 70% of the mobile data services amount occur in indoorly, and this ratio also will continue to increase, and expecting 2012 will be above 80%.Operator presses for the solution that two-forty is indoor, focus covers.
Indoor and hot spot data service feature for the user be generally fixing perhaps very low speed move, less demanding to mobility; On the other hand, data service is mainly Internet service, and is more single to the requirement of service quality (Quality of Serveice is called for short QoS), and far below the requirement of carrier class business to QoS.Traditional cell mobile communication systems mainly towards be high-speed mobile, the professional design of the carrier class of seamless switching, when it carried big flow low speed IP (Internet protocol) data packet traffic, efficient was on the low side, cost is too high.
Summary of the invention
The technical problem that the present invention will solve provides transmission method and the dispatching station under a kind of LTE-LAN of being applied to environment, reducing and to optimize the expense of original system, with the throughput of further raising system.
In order to solve the problems of the technologies described above, the invention provides a kind of transmission method, be applied to Long Term Evolution-local area network (LAN), comprising:
Dispatching station is the subframe structure based on standard cyclic prefix according to the transmitting antenna port number with sub-frame configuration; On the subframe that is disposed, send corresponding pilot tone then.
Further, said method also has following characteristics: said dispatching station comprises sub-frame configuration according to the transmitting antenna port number for the step based on the subframe structure of standard cyclic prefix:
Said dispatching station judges whether said transmitting antenna port number equals 2, if then the structural arrangements with said subframe is the unicast sub structure based on standard cyclic prefix; If not the sub-frame configuration that then will support the downlink physical shared channel to send is the single frequency network multicast broadcast subframe structure based on standard cyclic prefix, is the unicast sub structure based on standard cyclic prefix with other sub-frame configuration.
Further, said method also has following characteristics: said step of on the subframe that is disposed, sending corresponding pilot tone comprises:
On the said subframe that is configured to the unicast sub structure, send the public guide frequency of the coherent demodulation that is used for channel measurement and data;
On the said subframe that is configured to the single frequency network multicast broadcast subframe structure, send the public guide frequency of the coherent demodulation that is used for channel measurement and data at an antenna port;
On the said subframe that is configured to the single frequency network multicast broadcast subframe structure, send the special pilot frequency for user and the information state information pilot tone that is used for channel measurement of the coherent demodulation that is used for data in corresponding logical antenna ports; Perhaps
On the said subframe that is configured to the single frequency network multicast broadcast subframe structure; Send the public guide frequency of the coherent demodulation that is used for channel measurement and data and send the special pilot frequency for user of the coherent demodulation that is used for data and be used for the information state information pilot tone of channel measurement at antenna port in corresponding logical antenna ports.
Further, said method also has following characteristics: said subframe comprises special subframe, and said method also comprises: said dispatching station is 1 OFDM symbol with the protection arranged spaced in the said special subframe.
In order to address the above problem, the present invention also provides a kind of dispatching station, is applied to Long Term Evolution-local area network (LAN), comprising:
Configuration module is used for according to the transmitting antenna port number structural arrangements of subframe being the subframe structure based on standard cyclic prefix;
Sending module is used on the subframe of said configuration module configures, sending corresponding pilot tone.
Further, above-mentioned dispatching station also has following characteristics: said configuration module comprises:
Judging unit is used to judge whether said transmitting antenna port number equals 2;
First dispensing unit is used under the said transmitting antenna port number of said judgment unit judges equals 2 situation, is the unicast sub structure based on standard cyclic prefix with the structural arrangements of said subframe;
Second dispensing unit; Be used under the said transmitting antenna port number of said judgment unit judges is not equal to 2 situation; With the structure of supporting the subframe that the downlink physical shared channel sends; Being configured to the single frequency network multicast broadcast subframe structure based on standard cyclic prefix, is the unicast sub structure based on standard cyclic prefix with the structural arrangements of other subframes.
Further, above-mentioned dispatching station also has following characteristics: said sending module comprises:
First transmitting element is used for becoming in said configuration module configures the subframe of unicast sub structure, sends the public guide frequency of the coherent demodulation that is used for channel measurement and data;
Second transmitting element is used for becoming in said configuration module configures the subframe of single frequency network multicast broadcast subframe structure, sends the public guide frequency of the coherent demodulation that is used for channel measurement and data at an antenna port; Perhaps send the special pilot frequency for user and the information state information pilot tone that is used for channel measurement of the coherent demodulation that is used for data in corresponding logical antenna ports; Perhaps send the public guide frequency of the coherent demodulation that is used for channel measurement and data and send the special pilot frequency for user of the coherent demodulation that is used for data and be used for the information state information pilot tone of channel measurement in corresponding logical antenna ports at antenna port.
Further, above-mentioned dispatching station also has following characteristics: in tdd systems, said subframe comprises special subframe, said configuration module, and the protection arranged spaced that also is used for said special subframe is 1 OFDM symbol.
Further, above-mentioned dispatching station also has following characteristics: said dispatching station is base station or WAP.
To sum up; The present invention provides transmission method and the dispatching station under a kind of LTE-LAN of being applied to environment; Be fit to the problem that/local wireless data nomadic to solve insert, reduce and optimize the expense of original system, with the throughput of further raising system, satisfy the data user's of high speed development demand.
Description of drawings
Fig. 1 is the sketch map of the dispatching station of the embodiment of the invention;
Fig. 2 is the flow chart of transmission method of the present invention;
Fig. 3 be the embodiment of the invention based on the frame structure sketch map of LTE TDD system;
Fig. 4 is the structural representation of the unicast sub and the MBSFN subframe of the embodiment of the invention;
Fig. 5 a to Fig. 5 d is the pilot frequency design that the transmission of the embodiment of the invention is sent;
Fig. 6 is the flow chart of the transmission method of the embodiment of the invention.
Embodiment
In order to understand the present invention better, the present invention is done to describe further below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 is the sketch map of the dispatching station of the embodiment of the invention, and is as shown in Figure 1, and the dispatching station of present embodiment comprises: configuration module and sending module, wherein,
Configuration module is used for according to the transmitting antenna port number sub-frame configuration being the subframe structure based on standard cyclic prefix;
Sending module is used on the subframe of said configuration module configures, sending corresponding pilot tone.
Wherein, said configuration module can comprise:
Said judging unit is used to judge whether said transmitting antenna port number equals 2;
First dispensing unit is used under the said transmitting antenna port number of said judgment unit judges equals 2 situation, is the unicast sub structure based on standard cyclic prefix with the structural arrangements of said subframe;
Second dispensing unit; Be used under the said transmitting antenna port number of said judgment unit judges is not equal to 2 situation; With the structure of supporting the subframe that the downlink physical shared channel sends; Being configured to the single frequency network multicast broadcast subframe structure based on standard cyclic prefix, is the unicast sub structure based on standard cyclic prefix with the structural arrangements of other subframes.
Wherein, said sending module can comprise:
First transmitting element is used for becoming in said configuration module configures the subframe of unicast sub structure, sends the public guide frequency of the coherent demodulation that is used for channel measurement and data;
Second transmitting element is used for becoming in said configuration module configures the subframe of single frequency network multicast broadcast subframe structure, sends the public guide frequency of the coherent demodulation that is used for channel measurement and data at an antenna port; Perhaps send the special pilot frequency for user and the information state information pilot tone that is used for channel measurement of the coherent demodulation that is used for data in corresponding logical antenna ports; Perhaps send the public guide frequency of the coherent demodulation that is used for channel measurement and data and send the special pilot frequency for user of the coherent demodulation that is used for data and be used for the information state information pilot tone of channel measurement in corresponding logical antenna ports at antenna port.
Further, in tdd systems, said subframe comprises special subframe, said configuration module, and the protection arranged spaced that can also be used for said special subframe is 1 OFDM symbol.
Dispatching station in the present embodiment can be various types of base stations or WAP.
Cover channel circumstance to indoor, focus, because the delay of channel expansion is very little, the present invention provides a kind of transmission method, is applied to LTE-LAN, and is as shown in Figure 2, and method of the present invention comprises step:
S10, dispatching station are the subframe structure based on standard cyclic prefix according to the transmitting antenna port number with sub-frame configuration;
S20, dispatching station send corresponding pilot tone and data on the subframe that is disposed.
Dispatching station is configured to standard cyclic prefix (Normal Cyclic Prefix is called for short Normal CP) with the cyclic prefix type during of the symbol that is sent in each subframe (subframe).Said dispatching station can be all kinds base station or WAP (AP).Because it is little that indoor, focus covers the application scenarios coverage; The Cyclic Prefix of each symbol in unicast sub and the single frequency network multicast broadcast subframe all is configured to standard cyclic prefix can satisfies system requirements; With respect to extended cyclic prefix, can further reduce overhead.
Further; When the transmitting antenna port number equals 2; Dispatching station becomes to adopt the common unicast sub structure based on standard cyclic prefix with the structural arrangements of each subframe; Dispatching station sends public guide frequency (Common Reference Signal is called for short CRS) on said unicast sub then, and this CRS is used for the coherent demodulation of channel measurement and data.
Further; When the transmitting antenna port number is not equal to 2; Dispatching station is provided with the subframe of supporting that downlink physical shared channel (PDSCH) sends; Employing is based on single frequency network multicast/broadcasting (Multicast/Broadcast over Single Frequency Network is called for short MB SFN) subframe structure of standard cyclic prefix, and other subframes adopt the unicast sub structure based on standard cyclic prefix.
For being configured to adopt the MBSFN subframe based on standard cyclic prefix, following send mode can be selected to adopt by dispatching station:
A, dispatching station send the CRS of the coherent demodulation that is used for channel measurement and data on a sky port; Perhaps
B, dispatching station send the special pilot frequency for user of the coherent demodulation that is used for data and the channel condition information pilot tone that transmission is used for channel measurement (Channel-State Information Reference Signal is called for short CSI-RS) in corresponding logical antenna ports; Perhaps
C, dispatching station send the CRS of the coherent demodulation that is used for channel measurement and data and send the special pilot frequency for user and the CSI-RS that is used for channel measurement of the coherent demodulation that is used for data in corresponding logical antenna ports at an antenna port.
Further, for the special subframe of TDD (time division duplex) system, dispatching station is configured to equal 1 OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol with the interval of the protection in the special subframe (GP).
The method of the application of the invention to application scenarios (being LTE-LAN) indoor, that focus covers, through the reasonable disposition subframe, can reduce overhead, can further improve the throughput of system, to satisfy the demand of data business volume.
Fig. 3 be the embodiment of the invention based on the sketch map of frame structure of LTE TDD system.The unit frame of frame length 10ms is that the common upstream or downstream subframe 101 of 1ms is formed with special subframe 102 by 10 length.Wherein, special subframe 102 comprises descending time slot 103, protection interval 104 and ascending time slot 105.
Fig. 4 is the structural representation of the unicast sub and the MBSFN subframe of the embodiment of the invention.Described common unicast sub and MBSFN subframe frame length are 1ms, and each subframe is made up of 14 OFDM symbols 201, and the length of the standard cyclic prefix 202 that comprises in the OFDM symbol 201 is 4.758us.
Fig. 5 a to Fig. 5 d is the pilot frequency design that the transmission of the embodiment of the invention is sent.
Fig. 5 a is used for the channel measurement of two transmitting antenna ports and the public guide frequency pattern of data coherency demodulation, and the pilot frequency locations that antenna port 0 sends is as 302, and the pilot frequency locations that antenna port 1 sends is as 303; Antenna port 0,1 does not send in the position of 301 signs.
Fig. 5 b is that the transmitting antenna port number is not equal at 2 o'clock, the public guide frequency pattern that on the MBSFN subframe, sends through the single antenna port.
Fig. 5 c is the pattern of the special pilot frequency for user that is exclusively used in user data coherent demodulation of transmission on the antenna port 5.
Fig. 5 d is the pattern that is exclusively used in the channel condition information pilot tone of channel measurement on the antenna port 15～22; The pilot frequency design of antenna port 15 is to being applied to the single transmit antenna, and the pilot frequency design of antenna port 15,16,17,18 is to being applied to 4 transmitting antennas, and the pilot frequency design of antenna port 15,16,17,18,19,20,21,22 is to being applied to 8 transmitting antennas.
Fig. 6 is the flow chart of the transmission method of the embodiment of the invention, and idiographic flow is:
For the unicast sub that adopts based on standard cyclic prefix, dispatching station sends the CRS of the coherent demodulation that is used for channel measurement and data.
Preferably, for time division duplex (TDD) system, dispatching station also is configured to equal 1 OFDM symbol with the interval of the protection in the special subframe (GP), can adopt configuration A shown in the following table 1 or two kinds of configurations of configuration B, and unit is the OFDM symbol.
Table 1
| Special subframe | DwPTS (descending time slot) | GP | UpPTS (ascending time slot) |
| A | 12 | 1 | 1 |
| B | 11 | 1 | 2 |
Advantage of the present invention is to application scenarios indoor, that focus covers, sends through reasonable disposition subframe and signal, has reduced the control expense of system, can further improve the throughput of system.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
More than be merely the preferred embodiments of the present invention; Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. a transmission method is applied to Long Term Evolution-local area network (LAN), comprising:
Dispatching station is the subframe structure based on standard cyclic prefix according to the transmitting antenna port number with sub-frame configuration; On the subframe that is disposed, send corresponding pilot tone then.
2. the method for claim 1 is characterized in that: said dispatching station comprises sub-frame configuration according to the transmitting antenna port number for the step based on the subframe structure of standard cyclic prefix:
Said dispatching station judges whether said transmitting antenna port number equals 2, if then the structural arrangements with said subframe is the unicast sub structure based on standard cyclic prefix; If not the sub-frame configuration that then will support the downlink physical shared channel to send is the single frequency network multicast broadcast subframe structure based on standard cyclic prefix, is the unicast sub structure based on standard cyclic prefix with other sub-frame configuration.
3. method as claimed in claim 2 is characterized in that: said step of on the subframe that is disposed, sending corresponding pilot tone comprises:
On the said subframe that is configured to the unicast sub structure, send the public guide frequency of the coherent demodulation that is used for channel measurement and data;
On the said subframe that is configured to the single frequency network multicast broadcast subframe structure, send the public guide frequency of the coherent demodulation that is used for channel measurement and data at an antenna port;
On the said subframe that is configured to the single frequency network multicast broadcast subframe structure, send the special pilot frequency for user and the information state information pilot tone that is used for channel measurement of the coherent demodulation that is used for data in corresponding logical antenna ports; Perhaps
On the said subframe that is configured to the single frequency network multicast broadcast subframe structure; Send the public guide frequency of the coherent demodulation that is used for channel measurement and data and send the special pilot frequency for user of the coherent demodulation that is used for data and be used for the information state information pilot tone of channel measurement at antenna port in corresponding logical antenna ports.
4. like each described method of claim 1-3, it is characterized in that: said subframe comprises special subframe, and said method also comprises:
Said dispatching station is 1 OFDM symbol with the protection arranged spaced in the said special subframe.
5. a dispatching station is applied to Long Term Evolution-local area network (LAN), comprising:
Configuration module is used for according to the transmitting antenna port number structural arrangements of subframe being the subframe structure based on standard cyclic prefix;
Sending module is used on the subframe of said configuration module configures, sending corresponding pilot tone.
6. dispatching station as claimed in claim 5 is characterized in that: said configuration module comprises:
Judging unit is used to judge whether said transmitting antenna port number equals 2;
First dispensing unit is used under the said transmitting antenna port number of said judgment unit judges equals 2 situation, is the unicast sub structure based on standard cyclic prefix with the structural arrangements of said subframe;
Second dispensing unit; Be used under the said transmitting antenna port number of said judgment unit judges is not equal to 2 situation; With the structure of supporting the subframe that the downlink physical shared channel sends; Being configured to the single frequency network multicast broadcast subframe structure based on standard cyclic prefix, is the unicast sub structure based on standard cyclic prefix with the structural arrangements of other subframes.
7. dispatching station as claimed in claim 6 is characterized in that: said sending module comprises:
First transmitting element is used for becoming in said configuration module configures the subframe of unicast sub structure, sends the public guide frequency of the coherent demodulation that is used for channel measurement and data;
Second transmitting element is used for becoming in said configuration module configures the subframe of single frequency network multicast broadcast subframe structure, sends the public guide frequency of the coherent demodulation that is used for channel measurement and data at an antenna port; Perhaps send the special pilot frequency for user and the information state information pilot tone that is used for channel measurement of the coherent demodulation that is used for data in corresponding logical antenna ports; Perhaps send the public guide frequency of the coherent demodulation that is used for channel measurement and data and send the special pilot frequency for user of the coherent demodulation that is used for data and be used for the information state information pilot tone of channel measurement in corresponding logical antenna ports at antenna port.
8. like each described dispatching station of claim 5-7, it is characterized in that: in tdd systems, said subframe comprises special subframe, said configuration module, and the protection arranged spaced that also is used for said special subframe is 1 OFDM symbol.
9. like each described dispatching station of claim 5-7, it is characterized in that: said dispatching station is base station or WAP.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110033669.7A CN102624441B (en) | 2011-01-30 | 2011-01-30 | A kind of transmission method and dispatching station |
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| CN201110033669.7A CN102624441B (en) | 2011-01-30 | 2011-01-30 | A kind of transmission method and dispatching station |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421958A (en) * | 2006-04-12 | 2009-04-29 | Lg电子株式会社 | Method for allocating reference signals in MIMO system |
| WO2010068029A2 (en) * | 2008-12-09 | 2010-06-17 | Lg Electronics Inc. | Reference signal transmission method for downlink multiple input multiple output system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421958A (en) * | 2006-04-12 | 2009-04-29 | Lg电子株式会社 | Method for allocating reference signals in MIMO system |
| WO2010068029A2 (en) * | 2008-12-09 | 2010-06-17 | Lg Electronics Inc. | Reference signal transmission method for downlink multiple input multiple output system |
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