CN101584175B - The clean culture of multiplexing and the pilot configuration of SFN transmission - Google Patents
The clean culture of multiplexing and the pilot configuration of SFN transmission Download PDFInfo
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- CN101584175B CN101584175B CN200880001902.XA CN200880001902A CN101584175B CN 101584175 B CN101584175 B CN 101584175B CN 200880001902 A CN200880001902 A CN 200880001902A CN 101584175 B CN101584175 B CN 101584175B
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
-
- 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
- H04L5/0058—Allocation criteria
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- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention describes the system and method contributing to that unicast reference symbols and multicast transmission carry out in same Transmission Time Interval multiplexing.Especially, the invention provides the mechanism of the single frequency network transmission that unicast reference symbols can be multiplexed into the use longer cyclic prefix persistent period.Unicast reference symbols is sent in comprising first symbol of time slot of clean culture and single frequency network transmission.It is staggered between the frequency of the unicast reference symbols symbol subsequently in described first symbol and subframe.
Description
Cross-Reference to Related Applications
This application claims " A METHOD AND that submit, entitled on January 10th, 2007
APPARATUS FOR USING A PILOT STRUCTURE WITH MULTIPLEXED
UNICAST AND SFN TRANSMISSIONS " U.S. Provisional Patent Application No.
The rights and interests of 60/884,404.The application also requires " A that submit, entitled on January 6th, 2007
METHOD AND APPARATUS FOR USING A PILOT STRUCTURE WITH
MULTIPLEXED UNICAST AND SFN TRANSMISSIONS " US provisional patent
The rights and interests of application No.60/888,485.At this, above-mentioned application is hereby incorporated by reference.
Technical field
Described below relate generally to communication system, particularly relate at the clean culture of multiplexing and single frequency network transmission
Middle offer pilot configuration.
Background technology
Wireless communication system is widely deployed to provide various types of Content of Communication, such as voice, number
According to etc..Typical wireless communication system can be (such as can to carry by sharing available system resource
Wide, launch power etc.) support and the multi-address system of communication between multiple user.This multi-address system
Example can include CDMA (CDMA) system, time division multiple acess (TDMA) system, frequently
Divide multiple access (FDMA) system, OFDM (OFDMA) system etc..
Usually, wireless multiple-access communication system can support the communication of multiple mobile device simultaneously.Each
Mobile device can communicate with one or more base stations via the transmission in forward and reverse.Described
Forward link (or downlink) refers to the communication link from base station to mobile device, and reverse strand
Road (or up-link) refers to the communication link from mobile device to base station.Furthermore, it is possible to via
Single-input single-output (SISO) system, multiple input single output (MISO) system, multiple-input and multiple-output
(MIMO) system etc. set up communicating between mobile device with base station,
Mimo system generally uses multiple (NT) launch antenna and multiple (NR) reception antenna enters
Row data are transmitted.By NTIndividual transmitting antenna and NRThe mimo channel that individual reception antenna is constituted can be by
It is decomposed into NSIndividual independent channel, described independent channel is referred to alternatively as space channel, wherein NS≤{NT, NR}。
NSEach channel in individual independent channel corresponds to a dimension.It addition, if, with by multiple transmittings
The additional dimension created with reception antenna, then mimo system can provide the performance of improvement (such as
The spectrum efficiency strengthened, higher handling capacity and/or bigger reliability).
Mimo system can support different duplex technologies with on public physical medium split forward direction and
Reverse link communication.For example, FDD (FDD) system can be for forward and backward chain
Road communication uses diverse frequency field.Additionally, in time division duplex (TDD) system, front
Public frequency region can be used to reverse link communication.But, conventional art can be provided with limit
Relevant to channel information feedback or be not provided that the feedback relevant with channel information.
Summary of the invention
In order to one or more embodiments there being a basic understanding, shown below is these embodiments
Simplified summary.The detailed summary of the embodiment of the not all imagination of this summarized section, itself neither
Key to be determined or important composition element are not the protection domain depicting any or all embodiment.
Its object is to present in a simple form some concepts of one or more embodiment, in this, as slightly
After the preamble part more specifically described that presents.
According to an aspect, there is provided herein a kind of unicast and multicast transmission using multiplexing and send and lead
Frequently the method for signal.Described method can include classifying one or more transmission modes.It addition,
It is that at least one subframe selects Cyclic Prefix that described method includes according to one or more patterns classified
Persistent period.Described method can also include being at least partially based on the selected Cyclic Prefix persistent period,
In at least one subframe, pilot frequency information and user data are carried out multiplexing.
Another aspect relates to the radio communication device including the memorizer for preserving instruction, described finger
Order relates to classifying one or more transmission modes, according to one or more patterns classified being
At least one subframe selects the longer Cyclic Prefix persistent period and is at least partially based on described longer
The Cyclic Prefix persistent period, at least one subframe, pilot frequency information and user data are carried out multiplexing.
Described radio communication device can also include the processor being coupled to memorizer, and described processor is used for holding
Row preserves instruction in which memory.
Another aspect includes the radio communication dress helping send the pilot signal with multicast transmission multiplexing
Put.Described device can include the module for classifying one or more transmission modes.It addition,
Described device can include for according to one or more patterns classified being the selection of at least one subframe
The module of longer Cyclic Prefix persistent period.Described device could be included for being at least partially based on
The described longer Cyclic Prefix persistent period, to pilot frequency information and user data at least one subframe
Carry out the module of multiplexing.
Another aspect relates to storing thereon for classifying one or more transmission modes
The machine readable media of machine-executable instruction.Described machine readable media could be included for basis
One or more patterns classified are that at least one subframe selects the longer Cyclic Prefix persistent period
Instruction.It addition, described machine readable media can include for being at least partially based on described longer following
Ring prefix durations, carries out the finger of multiplexing at least one subframe to pilot frequency information and user data
Order.
According to another aspect, in a wireless communication system, device can include integrated circuit.Described
Integrated circuit can be configured to classify one or more transmission modes.Described integrated circuit is also
Can be configured to according to one or more patterns classified is that at least one subframe selects longer following
Ring prefix durations.It addition, described integrated circuit can be configured to be at least partially based on described in more
The long Cyclic Prefix persistent period, pilot frequency information and user data are carried out multiple at least one subframe
With.
In order to realize above-mentioned and relevant purpose, the one or more embodiment includes below will be in detail
Describe feature that is bright and that be particularly pointed out in the claims in detail.Description below and accompanying drawing are described in detail
Some illustrative aspects of one or more embodiments.But, only can making of these aspects instruction
By some modes in the various modes of the principle of each embodiment, described embodiment is intended to include
All these aspects and their equivalent.
Accompanying drawing explanation
Fig. 1 is the diagram of the wireless communication system according to the various aspects illustrated in this article；
Fig. 2 is according to the example communication dress used in the wireless communication system of an aspect of this disclosure
The diagram put；
Fig. 3 is the diagram of the wireless communication system according to an aspect of this disclosure；
Fig. 4-10 is the diagram that the example resources according to an aspect of this disclosure maps；
Figure 11 is the diagram of the illustrative methods according to an aspect of this disclosure, and described method contributes to
Pilot tone knot is provided in the multiplexing unicast with the longer cyclic prefix persistent period and multicast transmission
Structure；
Figure 12 contributes to use the figure of the EXEMPLARY MOBILE DEVICE of pilot configuration in mixed mode transmissions
Show；
Figure 13 is the example system contributing to building pilot frequency mode according to an aspect of this disclosure
Diagram；
Figure 14 is to be combined the example wireless network disposed with different system described herein and method
The diagram of environment；
Figure 15 contributes to build the exemplary system of pilot frequency mode in multiplexing unicast and multicast transmission
The diagram of system.
Detailed description of the invention
Referring now to accompanying drawing, each embodiment is described, wherein in whole accompanying drawing, identical reference marker
It is used to refer to similar elements.In the following description, for illustrative purposes, in order to provide one
Individual or multiple the comprehensive of embodiment understand, give many details.It may be evident, however, that also may be used
To realize these embodiments in the case of there is no these details.In other example, in order to just
In describing one or more embodiments, known structure and equipment illustrate with block diagram.
As used in this application, term " assembly ", " module ", " system " etc. mean and calculate
The entity that machine is relevant, it is hardware, firmware, the combination of hardware and software, software or executory soft
Part.Such as, assembly may be, but not limited to: the process run on a processor, processor, right
As, executable program, the thread of execution, program and/or computer.As example, set in calculating
Application and the calculating equipment of standby upper operation can be assemblies.One or more assemblies may reside within to be held
In the process of row and/or thread, assembly may be located in a computer and/or is distributed in two or more
Between computer.Additionally, these assemblies can store the various calculating of various data structure from it
Machine computer-readable recording medium performs.These assemblies can be communicated by locally and/or remotely process, such as root
According to have one or more packet signal (such as, from the data of an assembly, this assembly
Interact and/or all in the way of signal with another assembly in local system, distributed system
As interacted with other system on the network of the Internet etc) communicate.
Additionally, describe each embodiment herein in conjunction with mobile device.Mobile device is also referred to as
System, subscriber unit, subscriber station, movement station, mobile device, distant station, remote terminal, access are eventually
End, user terminal, terminal, Wireless Telecom Equipment, user agent, subscriber equipment or user's set (UE).
Mobile device can be cell phone, wireless phone, Session initiation Protocol (SIP) phone, wireless
Standing in ground loop (WLL), personal digital assistant (PDA), has the handheld device of wireless connection capability
Or it is connected to calculating equipment or other processing equipment of radio modem.Additionally, herein in conjunction with
Base station describes each embodiment.Base station may be used for and mobile device communication, and also may be used in this base station
To be referred to as access point, node B or some other terms.
Additionally, various aspects or features described herein may be implemented as method, device or use
Standard program and/or the goods of engineering.Term used herein " goods " is intended to can
Computer program from any computer readable device, carrier or medium access.Such as, computer can
Read medium can include, but are not limited to: magnetic storage apparatus (such as, hard disk, floppy disk, magnetic stripe etc.),
CD (such as, compact disk (CD), digital universal disc (DVD) etc.), smart card and flash
Device equipment (such as, EPROM, card, rod, key drive etc.).Additionally, described herein respectively
Plant storage medium and can represent that the one or more equipment for storing information and/or other machine readable are situated between
Matter.Term " machine readable media " can include but not limited to wireless channel and can store, comprise
And/or carry instruction and/or other media various of data.
Referring to Fig. 1, it is shown that according to the wireless communication system of various embodiments presented herein
100.System 100 includes base station 102, and this base station 102 can include multiple antenna sets.Such as, one
Individual antenna sets can include antenna 104 and 106, and another group can include antenna 108 and 110, another
Group can include antenna 112 and 114.Each antenna sets shows two antennas；But each group permissible
Use more or less of antenna.As will be apparent to those skilled in the art, base station 102 can also be wrapped
Include each in transmitter chain and receiver chain, transmitter chain and receiver chain can also include and letter
Number send and receive (such as, processor, manipulator, multiplexer, the demodulation of associated plurality of assembly
Device, demultiplexer, antenna etc.).
Base station 102 can be with one or more mobile device communications, such as mobile device 116 and movement
Equipment 122；It should be appreciated, however, that, base station 102 can be with the setting with mobile of substantially any quantity
Standby 116 mobile devices similar with 122 communicate.Mobile device 116 and 122 can be such as
Cell phone, smart phone, laptop computer, handheld communication devices, handheld computing device, defend
Star radio, global positioning system, PDA and/or any other are applicable at wireless communication system 100
On the equipment that communicates.As described, mobile device 116 communicates with antenna 112 and 114,
Wherein antenna 112 and 114 sends information to mobile device 116, Yi Jitong by forward link 118
Cross reverse link 120 and receive information from mobile device 116.It addition, mobile device 122 and antenna 104
Communicating with 106, wherein antenna 104 and 106 sends information to move by forward link 124
Dynamic equipment 122, and receive information by reverse link 126 from mobile device 122.At FDD
(FDD) in system, such as, forward link 118 can use and be used with reverse link 120
The frequency band that frequency band is different, forward link 124 can use the frequency band used with reverse link 126 not
Same frequency band.Additionally, in time division duplex (TDD) system, forward link 118 and reverse link
120 can use common band, forward link 124 and reverse link 126 can use common band.
Each group of antenna and/or the region being designated to communicate are properly termed as the sector of base station 102.
Such as, the movement during multiple antennas can be designed as the sector in region covered with base station 102 sets
For communicating.In communicating on forward link 118 with 124, the transmitting antenna of base station 102 can
The noise of the forward link 118 and 124 of mobile device 116 and 122 is improved with use beam shaping
Ratio.It addition, utilize beamforming to being randomly dispersed in the overlay area being associated in base station 102
Mobile device 116 and 122 when launching, with base station by the individual antenna all movements to it
Equipment carries out transmitting and compares, and the mobile device in adjacent cell can be by less interference.
According to an example, system 100 can be multiple-input and multiple-output (MIMO) communication system.This
Outward, system 100 can use any kind of duplex of such as FDD, TDD etc..According to exemplary plot,
Base station 102 can be sent to mobile device 116 and 122 by forward link 118 and 124.It addition,
Mobile device 116 and 122 can be estimated respective forward link or downlink channel and generate phase
The feedback answered, described feedback can be supplied to base station via reverse link or up-link 120 and 126
102。
Turning now to Fig. 2, illustrated is the communicator 200 disposed in a wireless communication environment.Logical
T unit 200 can be base station or one part.It addition, communicator 200 can be mobile device
Or one part.Communicator 200 can send to other communicator, base station, mobile device etc.
Data are transmitted or receive data transmission from other communicator, base station, mobile device etc..For example,
Receiver that communicator 200 can include being configured to communicate in a wireless communication system and/or
Transmitter system.Communicator 200 can use wireless communication technology, such as, but be not limited to
OFDMA, CDMA, TDMA, FDMA etc..Communicator 200 includes that transport-type detects
Device 202, for determining transport-type to be used.Described transmission can be that Single Frequency Network (SFN) passes
Defeated (such as synchronous transmission).It addition, described transmission can be unicast transmission.Furthermore, it is possible to use many
Broadcast Broadcast Single Frequency network (MBSFN) transmission.In addition it is possible to use clean culture, SFN and/or MBSFN
The combination of transmission.For example, unicast transmission can be transmitted at identical Transmission Time Interval with SFN
Interior merging or multiplexing.In other words, communicator 200 makes unicast transmission and the SFN transmission can be by
Time division multiplex.It is to be understood that according to various aspects of the disclosure can use above-mentioned these with
Other outer transmission mode.
Communicator 200 can include prefix selector 204, for determining the Cyclic Prefix for transmission.
Many modulation types, such as OFDM, can use Cyclic Prefix in link structure.According to example
Figure, described Cyclic Prefix contributes to the reception to transmission improved under the conditions of multi-path channel.Multichannel
Footpath is the propagation effect in radio communication, and it causes radio signal to be arrived by two or more paths
Reach antenna.Atmospheric duct, ionospheric reflection and/or refraction, or permissible from the reflection of building or massif
Produce multi-path channel condition.Cyclic Prefix is so that receiving multipath energy before actual transmissions data
Access solution.Typically, receiver system is after determining to allow frequency to realize orthogonality, to signal
It is decoded.According to an aspect, described Cyclic Prefix can be OFDM or other mode symbol
Repeating part.For example, the ending of this symbol can be repeated at the section start of symbol.One
In individual embodiment, the length of described Cyclic Prefix is equal to protection interval or cycle.
Typically, the persistent period of described Cyclic Prefix should exceed in multi-path channel and experienced
Big time delay.Therefore, it is possible to use various types of circulating prefix-lengths.Described Cyclic Prefix can be
Short Cyclic Prefix (persistent period of such as 4.7 microseconds), long loop prefix (such as 16.66 microsecond)
Or longer Cyclic Prefix (persistent period of such as 33.33 microseconds).Described longer Cyclic Prefix (example
Such as 33.33 microseconds) be probably in the SFN scheme be widely used repeater favourable.Can pass through
Pitch interval is reduced to 7.5KHz to build the numerology of described longer Cyclic Prefix.
Communicator 200 also includes that multiplexer 206, described multiplexer 206 can merge or multiplexing two
Or the multiple dissimilar or transmission of pattern.In accompanying drawing example, multiplexer 206 can be by point-to-point
(such as clean culture) transmission and SFN or MBSFN transmit multiplexing.In order to minimize following of unicast transmission
Ring prefix insertion loss, uses the clean culture of longer cyclic prefix and SFN transmission to be time multiplexed
's.In other words, some time slot is exclusively used in the transmission of longer cyclic prefix SFN.But, in order to promote
Efficiency in RAN1, unicast reference symbols and longer cyclic prefix SFN multicast transmission should be identical
Transmission Time Interval in multiplexing.In one embodiment, multiplexer 206 change comprises more long circulating
The resource distribution of the time slot of prefix SFN transmission and unicast transmission.According to diagram, at the of a time slot
One and the 3rd symbol sends unicast reference symbols.It addition, distribute to unicast reference symbols frequency or
Tone described first and the 3rd intersymbol be staggered (such as, use with first in the 3rd symbol
The frequency that symbol is different).Typically, unicast reference symbols takies every 6th tone.According to the disclosure
An aspect, multiplexer 206 configures (structure) to described resource so that unicast reference
Symbol takies every 12nd tone first and the 3rd in symbol.Additional extension dimension in described distribution
Hold the threshold sampling to unicast tunnel, to contribute to extending for the delay of up to 11 microseconds carrying out standard
True channel is estimated.It addition, by the quantity of the tone shared by minimizing, decrease in frequency domain
The expense of unicast reference symbols.But, due to the less pitch interval of 7.5KHz, threshold sampling quilt
Reserved.Illustratively unrestriced, provide above-mentioned tolerance.It is clear that can
To use other mark space of unicast reference symbols, frequency interval and to interlock.
It addition, although it is not shown, it will be appreciated that communicator 200 can include for protecting
Deposit the memorizer of instruction, described instruction relates to receiving data packet transfer, merging data packet is transmitted,
Decoding data transmission, transmission confirm message etc..Additionally, described memorizer can be to preserve previously to receive
The packet arrived, for merging before decoding.Additionally, communicator 200 can include
Processor, this processor (can such as be saved in the instruction in memorizer, never in conjunction with performing instruction
The instruction etc. that homology obtains) use.
Turning now to Fig. 3, illustrated is the radio communication of the deployment implementing multiplex unicast and multicast transmission
System 300.System 300 includes communicator 302 and 304.Communicator 302 and/or 304 is permissible
It is base station or one part.It addition, communicator 302 and/or 304 can be mobile device or one
Part.According to exemplary plot, can be between one or more base stations, one or more mobile device (example
Such as ad-hoc) between or radio communication between base station and mobile device in use system 300.
System 300 includes communicating with communicator 304, and (and/or any amount of different device (does not shows
Go out)) communicator 302.Communicator 302 can be transmitted data to by forward link channel
Device 304；In addition communicator 302 can receive data by reverse chain channel from device 304.
Described forward link and backward channel can include that point-to-point transmission mode (such as, clean culture), point are to many
Point transmission mode (such as, multicast) and/or broadcast transmission mode.It addition, system 300 can be many
Input multi output (MIMO) system.
Communicator 302 includes transport-type detector 306, prefix selector 308 and multiplexer 310.
Described transport-type detector 306 can detect transmission to be used in going to the transmission of device 304
Type or pattern.For example, described transmission can be unicast transmission, SFN transmission, MBSFN biography
Defeated and/or broadcast.Described prefix selector 308 may determine that the Cyclic Prefix of transmission.Example in diagram
In son, Cyclic Prefix can be short Cyclic Prefix, long loop prefix or longer Cyclic Prefix.Short follow
The persistent period of ring prefix can be 4.7 microseconds, and the persistent period of long loop prefix can be 16.66 micro-
Second, and the persistent period of longer or very long Cyclic Prefix can be 33.33 microseconds.It is described that determine can
With based on channel condition, expectation overhead thresholds, transmission mode etc..
Multiplexer 310 carried out multiplexing to symbol before being transmitted to device 304.Multiplexer 310
The SFN of Cyclic Prefix that can be longer to unicast reference symbols and use in same Transmission Time Interval
Transmission carries out multiplexing.In the example in the figures, before multiplexer 310 can build and comprise longer circulation
Sew SFN transmission and the time slot of unicast transmission so that unicast reference symbols is the first and the of described time slot
Three symbols are sent.It addition, the frequency distribution of unicast reference symbols can be described first and the 3rd
It is staggered between symbol.Furthermore, described unicast reference symbols can take described first and the 3rd symbol
Every 12nd tone in number.Owing to pitch interval is 7.5KHz, so between shared tone
Additional spacer reduce expense and do not affect the threshold sampling of unicast tunnel.For not comprising more long circulating
The time slot of prefix SFN transmission, it is possible to use conventional art.
Communicator 304 can include prefix detector 312, and this prefix detector is for transmitting or it
A part determines the Cyclic Prefix persistent period used by communicator 302.According to diagram, communication
Device 304 can be mobile device.Typically, mobile device is examined during initial cell search procedure
Survey the described Cyclic Prefix persistent period.Generally, mobile device has two supposition: short Cyclic Prefix and
Long loop prefix.But, along with the introducing of longer cyclic prefix (such as 33.33 microsecond), occur in that
3rd supposition.In the transmission using longer cyclic prefix numerology, there are three symbols in each time slot
Number.In time division multiplex (TDM) structure, two isolated signs in a time slot send main
Synchronous code (PSC) and auxiliary synchronous code (SSC).Therefore, for CCCH (CCCH)
Or the transmission of main broadcast channel (BCH), each time slot only retains a symbol.Therefore, a reality
Execute in example, in the time slot comprising PSC and/or SSC transmission, do not use described longer Cyclic Prefix number
Word.
Referring now to Fig. 4-10, depict exemplary resource according to an aspect of this disclosure and map.
For simplicity of illustration, described example illustrates the resource block in time and frequency dimension, its
Persistent period is equal to the subframe transmitted or two time slots (such as 1 millisecond).Every along frequency axis
Individual frame represents a tone, and the interval between its medium pitch is depended on when used Cyclic Prefix continues
Between.Each frame along time shaft represents a symbol, and wherein persistent period and the quantity of symbol also takes
Certainly in the Cyclic Prefix used.It is clear that Fig. 4-10 is for illustrative purposes, and this
Disclosure is not limited to the scope of these examples.Those skilled in the art should be understood that how to lead to
Cross change pitch interval, sub-frame duration etc., by resource mapped extension to the sky including varying number
The system of line.
In one embodiment, for long cyclic prefix duration (such as 16.66 microsecond) with short follow
Ring prefix durations (such as 4.7 microsecond), traditional reference symbol structure is all identical.Use
Traditional structure, if postpone extension (such as first multipath components and last multipath components it
Between time difference) more than 13 microseconds, then the channel performed by any mobile device is estimated all may meet
To aliasing.Even if in long cyclic prefix duration or the situation of longer cyclic prefix persistent period
Under, if unicast delay spread exceedes threshold value, then described numerology can not be used.Figure 4 and 5
Depicting and transmit, with long cyclic prefix duration, two unicast pilot structure being used together, it helps
In avoiding not mating between prefix durations and channel estimation accuracy.
In the diagram, it is illustrated that comprise a subframe (two time slots) of unicast pilot symbols.Follow long
Under ring prefix durations, each time slot comprises six symbols.Described structure is in high-doppler side
Case provides efficient operation.At first and the 4th on symbol and the of the second time slot of the first time slot
Pilot symbol transmitted on one and the 4th symbol.In the 4th symbol of two time slots, not every money
Source is mapped to antenna.It addition, described mapping is transformed into offer diversity.Fig. 5 describes offer more
Another pilot frequency mode of low overhead.This structure illustrate first and the 4th symbol at said two time slot
The frequency pilot sign every a tone is taken in number.This construction reduce the expense of half.With Fig. 4 institute
The pattern described is similar to, and described mapping is converted into offer diversity.
Fig. 6-7 depicts clean culture and the MBSFN transmission of multiplexing according to an aspect of this disclosure.At figure
In the example shown, the example described relates to acknowledgement channel (ACKCH) and physical down link controls
Unicast transmission on channel (PDCCH).Unicast data is not had to be sent.In one embodiment,
Two OFDM symbol of described ACKCH and PDCCH transmission span.Fig. 6 depicts based on similar
In the multiplexing transmission of the pilot frequency mode that Fig. 4 is described, and Fig. 7 depicts and is retouched based on being similar to Fig. 5
The multiplexing transmission of the pilot frequency mode painted.
In the resource block of illustrated multiplexing, described unicast reference symbols is shown as being mapped to specific
Antenna.In this exemplary arrangement, it is provided that 4 antenna MIMO system.Except unicast reference symbols
Outside, two symbols of beginning of subframe send clean culture ACKCH and PDCCH transmission.It addition,
SFN data and SFN reference marks can also be sent on symbol in described subframe.At Fig. 6
In, do not change unicast reference symbols structure；But, expense is the hugest.In the figure 7, not at son
Second time slot of frame sends unicast reference symbols.In the case of lacking unicast data, Fig. 6 and 7
Middle multiplexing structure contributes to reducing expense.Channel quality indicator (CQI) accuracy and illustrated
Any coherent demodulation in subframe after example is all affected.
Turning now to Fig. 9 and 10, illustrated is that the clean culture using the longer cyclic prefix persistent period is led
Frequently the unicast reference symbol pattern of structure.For example, the described longer cyclic prefix persistent period is permissible
It is 33.33 microseconds, and builds by pitch interval is reduced to 7.5KHz from 15KHz.More
Under long cyclic prefix duration, each time slot comprises 3 symbols rather than 6 symbols.Therefore, 1
Millisecond subframe comprises 6 symbols rather than 12 symbols.Pattern depicted in figure 9 may be used for 4 tunnels
Mimo system.If can be used for, in Figure 10, the pattern of diagram is using 2 road MIMO's
System provide lower expense, described system have cyclic delay diversity compared with other physical antenna
(CDD)。
With reference now to Fig. 8, illustrated is according to an aspect of this disclosure and longer cyclic prefix
The unicast reference symbol pattern of the unicast transmission of SFN transmission multiplexing.It is similar to Fig. 6 and 7, institute in Fig. 8
Diagram illustrative sub-frame comprise unicast reference symbols, SFN reference marks, clean culture ACKCH and
PDCCH transmission and SFN data.Comprising the transmission of longer cyclic prefix SFN and unicast transmission
In time slot, as result, pitch interval is 7.5KHz and each time slot comprises 3 symbols.At this
First symbol of time slot sends described unicast reference symbols.It addition, frequency is at described first time slot
It is staggered between reference marks and the first symbol of the second time slot of 1 millisecond of subframe in first symbol.
Although quantitatively, described interlocking is depicted as 6 tones, it should be appreciated that, it is possible to use its
Its alternating quantity.And, described unicast reference symbols takies the every 12nd of the first symbol of each time slot
Individual tone.For example, antenna 1 can be mapped to the reference marks in specific tone.Antenna 1
Next map ten two tones more high or low than described specific tone.Reference marks is expanded to every
12 tones, this keeps extending for the delay close to 11 microseconds unicast tunnel is carried out threshold sampling
The most also the expense in frequency domain is reduced.For not comprising the time slot of longer cycle frequency SFN transmission, institute
Stating pitch interval can be 15KHz, and can use the name knot illustrated the most in figs. 6 and 7
Structure (nominal structure).
With reference to Figure 11, illustrated is about contributing to multiplex unicast and SFN transmission, simultaneously reserved tool
The method having the unicast pilot structure of enough critical sampling properties.But, for simplicity of illustration,
Described method is shown and described as sequence of operations, it should be appreciated that and it is realized that, described method is also
It is not limited to the order of these actions, because according to one or more embodiments, some actions can be with not
Same order occurs and/or carries out with other action illustrated and described herein simultaneously.Such as, this area
Skilled artisan will appreciate that and it is realized that, alternatively, method can be represented as a series of relevant
State or event, such as with the form of state diagram.It addition, according to one or more embodiments, it is achieved
A kind of method is not required for all actions illustrated.
Turning now to Figure 11, illustrated contribute in the unicast transmission of multiplexing and there is more long circulating
The SFN transmission of prefix durations provides the method 1100 of pilot configuration.Inter alia, may be used
With using method 1100 to reduce answering of expense while estimate to provide enough threshold samplings for channel
With situation builds pilot frequency mode.In one embodiment, can movement in a wireless communication system
Implementation 1100 on equipment and/or base station.At reference number 1102, observe transmission mode.Described biography
Defeated can be unicast transmission, SFN transmission, MBSFN transmission, broadcast transmission etc..Additionally, described biography
Defeated can be its any combination.It addition, described transmission can include the circulating prefix-length of change.Lift
For example, the described Cyclic Prefix persistent period can be the short persistent period (such as 4.7 microsecond), grow and hold
Continuous time (16.66 microsecond) or longer duration (33.33 microsecond).True at reference number 1104
Determine transmission whether include having use longer or longer cyclic prefix persistent period SFN transmission time
Gap.If NO, then method 1100 proceeds to reference number 1106, wherein uses conventional reference symbol
Structure.Transmit if there is longer cyclic prefix SFN, then method 1100 proceeds to reference number 1108.
1108, create a kind of structure, in the structure shown here, the symbol of this time slot sends unicast reference symbol
Number.At reference number 1110, increase is taken by the unicast reference symbols of the first symbol of described time slot
Gap between tone.For example, before described fiducial mark can be spaced to occupy more long circulating
Sew every 12nd tone of the first symbol in transmission rather than transmit at long and/or short Cyclic Prefix
In typically used as every 6th tone.At reference number 1112, described frequency is comprising unicast reference
First symbol of one time slot of symbol and comprise unicast reference symbols time slot subsequently the first symbol it
Between be staggered.When two time slots are all in same subframe, described frequency is the of described subframe
It is staggered between one and the 4th symbol.
It is to be understood that according to one or more aspects described herein, can pass which uses
Defeated, utilize which Cyclic Prefix, special multiplexer mode etc. whether should be used to make deduction.Such as this
Literary composition is used, and term " is inferred " or " reasoning " is commonly referred to as according to by event and/or data
The one group of observed result obtained, inference or infer the process of state of system, environment and/or user.
Such as, reasoning can be used to identify specific context or action, or reasoning can produce state
Probability distribution.This reasoning is probabilistic, say, that according to the data considered and event,
Calculate the probability distribution of state interested.Reasoning also refers to for according to event set and/or data set
Constitute the technology of advanced event.This reasoning makes the event set arrived according to the observation and/or the thing stored
Whether number of packages, according to constructing new event or action, was correlated with regardless of event on the hand-to-hand time,
And whether event and data are from one or several events and data source.
According to example, one or more methods given above can include making about determining transmission mould
The deduction of formula.By further illustrating, can be to determining whether time slot comprises longer cyclic prefix SFN
Transmission and unicast transmission, whether should use high doppler structure, expense reduce whether should be main
Targets etc. make deduction.It will be understood that above-mentioned example is illustrative rather than being intended to limiting permissible
That makes infers number or combines the mode making deduction from different embodiments described here and/or method.
Figure 12 contributes to use the clean culture comprising multiplexing and have the longer cyclic prefix persistent period
The diagram of the mobile device 1200 of SFN transmission.Mobile device 1200 includes receiver 1202, described
Receiver receives the signal from such as reception antenna (not shown), and performs received signal
Typical operation (such as filter, amplify, down coversion etc.) and the signal after adjusting is carried out numeral
Change to obtain sampling.Receiver 1202 can also be such as MMSE receiver, and can include
Received signal can be demodulated and provide it to the processor 1206 demodulation for channel estimation etc.
Device 1204.Processor 1206 can be exclusively used in analyze the information that received by receiver 1202 and/or
Generate the processor of the information sent for transmitter 1216, be used for controlling one of mobile device 1200
Or the processor of multiple assembly, and/or for analyzing the information received by receiver 1202, generate and supply
The information that transmitter 1216 sends, and control the place of one or more assemblies of mobile device 1200
Reason device.
Mobile device 1200 can comprise additionally in memorizer 1208, and described memorizer is operatively coupled to
Processor 1206 and can store by send data, received data relevant to available channel
Information is associated with distributed channel with the data analyzing signal correction connection and/or interference strength
Information, power, speed etc., and channel estimated and carries out via channel by other any being suitable for
The information transmitted.Memorizer 1208 can additionally store and (such as based on performance, based on capacity etc.)
Estimate and/or use the agreement that is associated of channel and/or algorithm.
It is to be appreciated that data storage device described herein (such as memorizer 1208) is permissible
It is volatile memory or nonvolatile memory, maybe can include volatile memory and non-volatile
Both memorizeies.Being illustrated with and unrestricted, nonvolatile memory can include read-only storage
Device (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), electrically erasable
Except PROM (EEPROM) or flash memory.Volatile memory can include as outside
The random access memory (RAM) of cache memory.It is illustrated with and unrestricted, RAM
Can there be various ways, such as synchronous random access memory (SRAM), dynamic ram (DRAM), synchronization
DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhancement mode SDRAM
(ESDRAM), Synchlink DRAM (SLDRAM) and direct Rambus RAM
(DRRAM).The memorizer 1208 of system and method is intended to include but are not limited to these and appoint
The type of memory that what it is suitable for.
Processor 1202 is also operably coupled to prefix detector 1210, and described prefix detector is used for
Determine the Cyclic Prefix persistent period that the communicator 302 in transmission or one part is used.According to
Diagram, communicator 304 can be mobile device.Typically, mobile device is at search of initial zone
This Cyclic Prefix persistent period is detected during process.Generally, there are two supposition in mobile device: short follows
Ring prefix and long loop prefix.But, along with the introducing of long loop prefix (such as 33.33 microsecond),
Occur in that the 3rd supposition.In the transmission using longer cyclic prefix numerology, each time slot has
Three symbols.After used Cyclic Prefix numerology being detected, described transmission can be decoded also
And reference marks is used for unicast tunnel estimation.Mobile device 1200 also includes manipulator 1214 and sends out
Penetrate machine 1216, described transmitter 1216 for signal (such as replying message) is sent to such as base station,
Another mobile device etc..Although being depicted as independent of processor 1206, it should be appreciated that,
Prefix detector 1210 and/or manipulator 1214 can be a part for processor 1206 or multiple process
Device (not shown).
Figure 13 is the exemplary plot of the system 1300 according to an aspect of this disclosure.System 1300 includes
Having the base station 1302 (such as access point) of receiver 1310 and transmitter 1322, described receiver leads to
Cross multiple reception antenna 1306 and receive signal, described transmitter from one or more mobile devices 1304
Sent to one or more mobile devices 1304 by multiple transmitting antennas 1308.In one aspect,
Data stream can be sent to one or more mobile device 1304 as packet by transmitter 1322
Sequence, so that send each packet successively until being identified.Receiver 1310 can receive from
The information of antenna 1306, and be operationally associated with demodulator 1312, described demodulator is used for
Information received by demodulation.The processor similar with for the processor described by Figure 12 can be utilized
1314 analyze demodulation symbol, and this processor 1314 is coupled to memorizer 1316, described storage
Device storage with estimate signal (such as pilot tone) intensity and/or interference strength, sent or set from movement
The information that standby 1304 data received (or independent base station (not shown)) are relevant, and/or any
Other is about performing various operations described herein and the adequate information of function.
Processor 1314 is also coupled to transmit detector 1318, and described detector is used for determining and is going
The transmission mode used in transmission toward mobile device 1304.Described transmission mode can be clean culture mould
One of formula, SFN pattern, MBSFN pattern, broadcast mode or a combination thereof.Also may be used in base station 1302
To include prefix selector 1320, described prefix selector selects the Cyclic Prefix persistent period with in transmission
Or one part uses.For example, the circulation of change can be used in the different subframes of transmission
Prefix durations.Information to be transmitted can be provided to manipulator 1322.Manipulator 1322 can
So that the information being sent to mobile device 1304 via antenna 1308 for transmitter 1326 is carried out multiplexing.
Although being depicted as independent of processor 1314, it should be appreciated that, demodulator 1312, detector 1318,
Selector 1320 and/or manipulator 1322 can be a part for processor 1314 or multiple processor
(not shown).
Figure 14 shows example wireless communications 1400.For simplicity purposes, radio communication system
System 1400 depicts a base station 1410 and a mobile device 1450.It will be appreciated, however, that
System 1400 can comprise more than a base station and/or more than one mobile device, wherein additional base station
And/or mobile device may be largely analogous to or be different from example described below base station 1410 He
Mobile device 1450.In addition, it is to be appreciated that base station 1410 and/or mobile device 1450 are permissible
Use system as described herein (Fig. 1-3 and 12-13) and/or method (Figure 11) to contribute to it
Between radio communication.
In base station 1410, the business datum of multiple data streams is supplied to send (TX) from data source 1412
Data processor 1414.According to an example, each data stream can be sent by respective antenna.
TX data processor 1414 is based upon the specific coding scheme of business data flow selection to described business number
According to flowing to formatting lines, encoding and interweave, to provide coded data.
OFDM (OFDM) technology can be used, by the coded data of each data stream with
Pilot data multiplexing.Additionally or alternatively, described frequency pilot sign can be frequency division multiplexed (FDM),
Time division multiplex (TDM) or code division multiplexing (CDM).Described pilot data is typically with known
Mode carry out the known data pattern that processes, and mobile device 1450 can be used for estimate
Channel response.Certain modulation schemes (the such as binary phase-shift that each data stream selects can be based upon
Keying (BPSK), QPSK (QPSK), M phase-shift keying (PSK) (M-PSK), the orthogonal width of M
Degree modulation (M-QAM) etc.) pilot tone of described multiplexing and the coded data of each data stream are carried out
Modulation (such as symbol mapping), to provide modulation symbol.Utilize the processor 1430 to perform or provide
Instruction determines the data rate of each data stream, encodes and modulate.
The modulation symbol of data stream can be provided to TX MIMO processor 1420, described processor
Process described modulation symbol (such as OFDM) further.Then, TX MIMO processor
1420 to 1422t is to NTIndividual transmitter (TMTR) 1422a provides NTIndividual stream of modulation symbols.Not
In same embodiment, beam shaping weighting is applied to the symbol of data stream by TX MIMO processor 1420
Number and sending in the antenna of symbol.
Each transmitter 1422 receives and processes respective symbol stream to provide one or more simulation letter
Number, a step joint (such as amplify, filter and up-conversion etc.) described analogue signal of going forward side by side is fitted to provide
For the modulated signal of transmission on mimo channel.It addition, from NTIndividual antenna 1424a to 1424t
Send the N from transmitter 1422a to 1422t respectivelyTIndividual modulated signal.
In mobile device 1450, the modulated signal sent is by NRIndividual antenna 1452a to 1452r connects
Receive, and be provided to respective receiver (RCVR) from the reception signal of each antenna 1452
1454a to 1454r.It is respective that each receiver 1454 regulates (such as filter, amplify and down coversion)
Signal, is digitized providing sampling to the signal after regulation, and processes described sampling further
To provide corresponding " receiving " symbol stream.
RX data processor 1460 can based on specific receiver treatment technology receive and process from
NRThe N of individual receiver 1454RIndividual receive symbol stream, to provide NTIndividual " detecting " symbol stream.
RX data processor 1460 can demodulate, deinterleaving and decoding is each has detected symbol stream, to recover
The business datum of described data stream.The process performed by RX data processor 1460 with in base station 1410
The process performed by TX MIMO processor 1420 and TX data processor 1414 complementary.
Processor 1470 can the most periodically determine which pre-coding matrix of use.Additionally, place
Reason device 1470 can be formulated and include matrix index portion and the reverse link message of rank value part.
Described reverse link message can include different from what communication link and/or received data stream were correlated with
The information of type.Described reverse link message can be processed by TX data processor 1438, by modulating
Device 1480 is modulated, and by transmitter 1454a to 1454r regulation and is sent back, wherein by base station 1410
Described TX data processor 1438 also receives the business number of the multiple data streams from data source 1436
According to.
In base station 1410, the modulated signal from mobile device 1450 is received by antenna 1424, by
Receiver 1422 regulates, demodulator 1440 demodulate, and is processed by RX data processor 1442
To extract the reverse link message that mobile device 1450 is sent.Additionally, processor 1430 can be located
Manage extracted message, to determine which pre-coding matrix of use is to determine that described beam shaping weights.
Processor 1430 and 1470 can instruct (such as control, coordinate, management etc.) at base respectively
Stand 1410 and mobile device 1450 at operation.Processor 1430 and 1470 can be deposited with respective
Reservoir 1432 and 1472 is associated, described memorizer storage program coding and data.Processor 1430
Can also perform to calculate with frequency and the impulse response of deriving up-link and downlink respectively with 1470
Estimate.
It should be understood that embodiment described herein can use hardware, software, firmware, in
Between part, microcode or its any combination realize.Hardware is realized, can be one or more special
Integrated circuit (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD),
PLD (PLD), field programmable gate array (FPGA), processor, controller,
Microcontroller, microprocessor, it is designed to perform other electronic unit of function described herein, or
A combination thereof realizes described processing unit.
This enforcement is implemented when using software, firmware, middleware or microcode, program code or code segment
During example, described embodiment can be stored in machine readable media, such as, store assembly.Code segment
Process, function, subprogram, program, routine, subroutine, module, software kit, class can be represented
Or instruction, data structure or any combination of program statement.By transmission and/or receive information, data,
Independent variable, parameter or storage content, code segment is alternatively coupled to another code segment or hardware circuit.
Can use include storage share, message transmission, alternative space, network transmission etc. any suitably
Means are transmitted, are forwarded or transmission information, independent variable, parameter, data etc..
For software implement, can use perform functionality described herein module (such as process,
Function etc.) implement techniques described herein.Software code can store in the memory unit, and
And performed by processor.Memory element can realize outside processor inside or processor, is processing
In the case of the outside realization of device, described memory element can be able to be led to by various means well known in the art
It is coupled to described processor letter.
With reference to Figure 15, illustrated is the system implementing to send the pilot signal with multicast transmission multiplexing
1500.For example, in system 1500 can be at least partially situated at mobile device and/or base station.Should
Should it is realized that, system 1500 is represented as including functional block, and it can be to represent processor, software
Or the functional block of function that a combination thereof (such as firmware) realizes.System 1500 includes can be with collaborative work
The logical groups 1502 of electronic component.Such as, logical groups 1502 can include for entering transmission mode
The electronic building brick 1504 of row classification.Described pattern can be that point-to-point transmission (such as clean culture), point are to many
Point (such as multicast), broadcast or a combination thereof.Additionally, logical groups 1502 can include following for selection
The electronic building brick 1506 of ring prefix durations.For example, transmission mode, channel condition or efficiency
Problem can affect the used Cyclic Prefix persistent period.It addition, logical groups 1502 can include using
Electronic building brick 1508 in multiplexing pilot information in subframe.Such as, longer cyclic prefix SFN is being comprised
In the subframe of transmission, unicast pilot information can be sent in the first of described subframe and the 4th symbol.
It addition, the frequency used can described first and the 4th intersymbol interleaved.And, system 1500
Can include storing reservoir 1510, for preserving for performing and electronic building brick 1504,1506 and 1508
The instruction of the function being associated.Although being shown in the outside of memorizer 1510, but it is understood that
It is that one or more in electronic building brick 1504,1506 and 1508 may reside in memorizer 1510
Inside.
The example including one or more embodiment as described above.Obviously, in order to describe above institute
The embodiment stated and each of parts or method is described it is conceivable that combination be impossible, but
Many further combination and the displacements that it will be appreciated by the appropriately skilled person that each embodiment are can
Can.Therefore, described embodiment is intended to cover and falls into appended spirit and scope by the claims
All these replacements, amendment, modification.Additionally, just make in detailed description of the invention or claim
Term " comprise " for, the mode that contains of this word is similar to " an including " word, as " bag
Including " word is used as link word explained in the claims.
Claims (6)
1. use the method that the unicast and multicast transmission of multiplexing carrys out pilot signal transmitted, including:
One or more transmission modes are classified；
According to one or more patterns classified, long loop prefix is selected to continue at least one subframe
Time；With
It is at least partially based on described long cyclic prefix duration, to institute at least one subframe described
State the unicast reference symbols of unicast transmission and the multicast reference marks of described multicast transmission and multicast users
Data carry out multiplexing,
Wherein, described multiplexing includes passing when at least one subframe described comprises long loop prefix Single Frequency Network
Time defeated, only unicast reference symbols is distributed in the first time slot of at least one subframe described or by institute
State unicast reference symbols to distribute in described first time slot and the second time slot of at least one subframe described,
Wherein, described unicast reference symbols being spaced in tone assignment between the tone taken is expanded,
And wherein, if only by the distribution of described unicast reference symbols in described the of at least one subframe described
In one time slot, then it is used for the frequency of transmission of described unicast reference symbols at least one subframe described
Distinct symbols between be staggered, and if by described unicast reference symbols distribution described at least
In described first time slot of one subframe and described second time slot, then for described unicast reference symbols
The frequency of transmission comprises described unicast reference symbols in described first time slot of at least one subframe described
A symbol and at least one subframe described described second time slot in comprise described unicast reference symbols
Symbol subsequently between be staggered.
The most described transmission mode includes unicast transmission, list
Frequently at least one in network transmission, multicast transmission, synchronous transmission transmission or broadcast transmission.
3. the method for claim 1, also includes preventing from using in the subframe comprise synchronous code
The longer persistent period.
4. contribute to sending a radio communication device for the pilot signal with multicast transmission multiplexing, including:
For the module that one or more transmission modes are classified；
For according to one or more patterns classified, selecting long loop prefix at least one subframe
The module of persistent period；With
For being at least partially based on described long cyclic prefix duration, at least one subframe described
To the unicast reference symbols of unicast transmission and the multicast reference marks of described multicast transmission and multicast users
Data carry out the module of multiplexing,
Wherein, described multiplexing includes passing when at least one subframe described comprises long loop prefix Single Frequency Network
Time defeated, only unicast reference symbols is distributed in the first time slot of at least one subframe described or by institute
State unicast reference symbols to distribute in described first time slot and the second time slot of at least one subframe described,
Wherein, described unicast reference symbols being spaced in tone assignment between the tone taken is expanded,
And wherein, if only by the distribution of described unicast reference symbols in described the of at least one subframe described
In one time slot, then it is used for the frequency of transmission of described unicast reference symbols at least one subframe described
Distinct symbols between be staggered, and if by described unicast reference symbols distribution described at least
In described first time slot of one subframe and described second time slot, then for described unicast reference symbols
The frequency of transmission comprises described unicast reference symbols in described first time slot of at least one subframe described
A symbol and at least one subframe described described second time slot in comprise described unicast reference symbols
Symbol subsequently between be staggered.
5. radio communication device as claimed in claim 4, wherein, described transmission mode includes clean culture
At least one in transmission, single frequency network transmission, multicast transmission, synchronous transmission transmission or broadcast transmission.
6. a kind of device in wireless communication system, described device includes:
Integrated circuit, is used for:
One or more transmission modes are classified；
According to one or more patterns classified, select long loop prefix at least one subframe
Persistent period；With
It is at least partially based on described long cyclic prefix duration, at least one subframe described
To the unicast reference symbols of unicast transmission and the multicast reference marks of multicast transmission and multicast users
Data carry out multiplexing,
Wherein, described multiplexing includes when at least one subframe described comprises long loop prefix SFN
During network transmission, only unicast reference symbols is distributed in the first time slot of at least one subframe described
Or by described unicast reference symbols distribution at least one subframe described described first time slot and
In second time slot, wherein, described unicast reference symbols it is spaced in sound between the tone taken
Adjust in distribution and be expanded, and wherein, if only described unicast reference symbols is distributed described
In described first time slot of at least one subframe, then it is used for the transmission of described unicast reference symbols
Frequency is staggered between the distinct symbols at least one subframe described, and if by institute
State the unicast reference symbols distribution described first time slot and described second at least one subframe described
In time slot, then it is used for the frequency of transmission of described unicast reference symbols at least one subframe described
Described first time slot in comprise a symbol of described unicast reference symbols with described at least one
It is staggered for comprising in described second time slot of subframe between the symbol subsequently of described unicast reference symbols
's.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610829017.7A CN106877987B (en) | 2007-01-10 | 2008-01-10 | Pilot structure for multiplexed unicast and SFN transmissions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88440407P | 2007-01-10 | 2007-01-10 | |
| US60/884,404 | 2007-01-10 | ||
| US88848507P | 2007-02-06 | 2007-02-06 | |
| US60/888,485 | 2007-02-06 | ||
| US11/971,801 | 2008-01-09 | ||
| US11/971,801 US8077801B2 (en) | 2007-01-10 | 2008-01-09 | Pilot structure with multiplexed unicast and SFN transmissions |
| PCT/US2008/050724 WO2008086461A2 (en) | 2007-01-10 | 2008-01-10 | Pilot structure with multiplexed unicast and sfn transmissions |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610829017.7A Division CN106877987B (en) | 2007-01-10 | 2008-01-10 | Pilot structure for multiplexed unicast and SFN transmissions |
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| CN101584175A CN101584175A (en) | 2009-11-18 |
| CN101584175B true CN101584175B (en) | 2016-10-05 |
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| CN201610829017.7A Active CN106877987B (en) | 2007-01-10 | 2008-01-10 | Pilot structure for multiplexed unicast and SFN transmissions |
| CN200880001902.XA Active CN101584175B (en) | 2007-01-10 | 2008-01-10 | The clean culture of multiplexing and the pilot configuration of SFN transmission |
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| US9160592B2 (en) * | 2011-02-23 | 2015-10-13 | Qualcomm Incorporated | System and method for single carrier optimization for evolved multimedia broadcast multicast service |
| US9264249B2 (en) * | 2012-03-28 | 2016-02-16 | Qualcomm Incorporated | Extending cyclic prefix length in wireless communication network having mixed carrier |
| US10237103B2 (en) * | 2015-11-24 | 2019-03-19 | Qualcom Incorporated | Changing cyclic prefix (CP) length based on precoder mode selection |
| EP3437397B1 (en) | 2016-03-31 | 2022-10-19 | British Telecommunications public limited company | Mobile communications network |
| EP3437398B1 (en) | 2016-03-31 | 2020-12-16 | British Telecommunications public limited company | Mobile communications network |
| US11510116B2 (en) | 2016-06-29 | 2022-11-22 | British Telecommunications Public Limited Company | Multicast-broadcast mobile communications network |
| US10771298B2 (en) * | 2016-08-04 | 2020-09-08 | British Telecommunications Public Limited Company | Mobile communications network |
| US10159097B2 (en) * | 2016-09-30 | 2018-12-18 | Qualcomm Incorporated | Signaling and determination of slot and mini-slot structure |
| CN110581727A (en) | 2018-06-08 | 2019-12-17 | 英国电讯有限公司 | Wireless telecommunications network |
| CN111193579B (en) * | 2018-11-13 | 2021-09-24 | 维沃移动通信有限公司 | Reference time position determining method, transmission method, terminal and network equipment |
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| US8577299B2 (en) * | 2004-06-04 | 2013-11-05 | Qualcomm Incorporated | Wireless communication system with configurable cyclic prefix length |
| CN101027882B (en) * | 2004-09-24 | 2012-12-12 | 高通股份有限公司 | Method and apparatus for communication in a system employing differing transmission protocols |
| US20060176966A1 (en) * | 2005-02-07 | 2006-08-10 | Stewart Kenneth A | Variable cyclic prefix in mixed-mode wireless communication systems |
| RU2007137563A (en) * | 2005-04-15 | 2009-05-20 | Нокиа Корпорейшн (Fi) | SYNCHRONIZATION METHOD IN A MULTI-CHANNEL SYSTEM USING VARIABLE PROTECTIVE INTERVALS |
| US7894818B2 (en) * | 2005-06-15 | 2011-02-22 | Samsung Electronics Co., Ltd. | Apparatus and method for multiplexing broadcast and unicast traffic in a multi-carrier wireless network |
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| CN101584175A (en) | 2009-11-18 |
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