CN103974407B - A kind of mapping method, system and the device of smart synchronized tracking reference symbol - Google Patents

A kind of mapping method, system and the device of smart synchronized tracking reference symbol Download PDF

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Publication number
CN103974407B
CN103974407B CN201310042573.6A CN201310042573A CN103974407B CN 103974407 B CN103974407 B CN 103974407B CN 201310042573 A CN201310042573 A CN 201310042573A CN 103974407 B CN103974407 B CN 103974407B
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China
Prior art keywords
reference symbol
synchronized tracking
tracking reference
smart
smart synchronized
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CN201310042573.6A
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Chinese (zh)
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CN103974407A (en
Inventor
王锐
史志华
徐晓东
胡丽洁
韩璐
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中国移动通信集团公司
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Abstract

The invention discloses a kind of mapping method, system and the device of smart synchronized tracking reference symbol, this method includes base station by sending smart synchronized tracking reference symbol to terminal in the guard band of down channel, realizes smart synchronized tracking.Technical scheme is not take up actually using frequency band, can substantially reduce the interference to adjacent area, increase available resources, allow the design of new carrier wave more flexible due to smart synchronized tracking reference symbol is mapped on guard band.

Description

A kind of mapping method, system and the device of smart synchronized tracking reference symbol

Technical field

The present invention relates to wireless communication technology field, more particularly to a kind of mapping method of smart synchronized tracking reference symbol, System and device.

Background technology

It is not that all frequency bands of distribution can all take, band edge can give over to guard band in LTE system, there is provided Interference protection, as shown in Figure 1.Such as 20M systems, distribute 110RB, actually use 100RB, each 5RB in edge as guard band, Meet that the out-of-band radiation requirement, all data-signals, reference signal etc. of radio frequency is transmitted in frequency band is actually used.

In LTE R8/9/10 versions, system passes through public reference signal(Common Reference Signa l, CRS)To synchronize tracking.As shown in Fig. 2 by taking 4 port CRS as an example, public reference signal is spaced 2RE on frequency domain(Time-frequency Resource element), full bandwidth(Actually use frequency band)Send, per 3 symbols of Time Slot Occupancy in time domain.

In order to further lift spectrum efficiency, HetNet, and the factor such as energy-conservation are preferably supported, 3GPP determines to introduce one Kind new wave-carring type(New Carrier Type, NCT).New carrier wave does not support transmission mode 1-8(Transmission mode 1-7 needs public affairs Reference signal is demodulated altogether), and since R10, system carries out physical layer measurement by CSI-RS(R8/9 passes through common reference Signal is carried out), so the major applications scene of public reference signal has all been not present.

Therefore in NCT designs, it is desirable to public reference signal CRS is reduced or eliminated, so as to reach further lifting The design objects such as spectrum efficiency, energy-conservation.But synchronized tracking still needs to carry out by public reference signal CRS, if in NCT Middle to remove public reference signal CRS completely, smart synchronization/synchronized tracking can be problematic.For the problem, currently existing scheme at present For:Continue to retain public reference signal CRS, for smart synchronization/synchronized tracking, but increase public reference signal CRS transmission week Phase(Sent out once per 5ms), its transmission bandwidth, which can reduce, to be reduced.

Although existing scheme still remains public reference signal CRS, considered to ensure smart synchronization/synchronized tracking It is the cell level parameter that full bandwidth is sent to public reference signal CRS, its periodicity is sent can cause larger do to adjacent area Disturb, because to ensure channel estimation quality, public reference signal CRS will be sent after power ascension, i.e. common reference Signal CRS transmit power is higher than the transmit power of data, and user data can be disturbed by stronger adjacent area with frequency CRS.

It is every TTI6 symbol according to R8/9/10 public reference signals CRS(4 ports), full bandwidth(Actually use frequency band) Send, per RB(Resource block)Interior most 12 RE(4 ports)For transmitting public reference signal CRS, the public ginseng per resource block It is 12/84=14.29% to examine signal CRS expenses, and expense is larger.Prior art increases the common reference symbol CRS transmission cycle, The public reference signal CRS of whole system expense is reduced to a certain extent.But in that of transmission public reference signal CRS At a little moment, public reference signal CRS expense is still larger, reduces the throughput of system at the moment.

In LTE system, if resource is by certain signal(Data, control signal, reference signal, synchronizing signal etc.)Account for With can not then be used by other signals.Remain public reference signal CRS, it is meant that the money that public reference signal CRS is used Source, other signals can not use, and new carrier wave needs to avoid these moneys that may be taken by public reference signal CRS in design Source, cause resource fragmentation, limitation new carrier wave design.

The content of the invention

In order to solve the technical problem that public reference signal CRS present in prior art takes resource, the present invention proposes A kind of mapping method, system and the device of smart synchronized tracking reference symbol, reality can be not take up while realizing that essence is synchronous Service band, the interference to adjacent area is reduced, increase available resources.

One aspect of the present invention provides a kind of mapping method of smart synchronized tracking reference symbol, suitable for LTE system, base Stand by sending smart synchronized tracking reference symbol to terminal in the guard band of down channel, realize smart synchronized tracking.

Another aspect of the present invention provides a kind of mapped system of smart synchronized tracking reference symbol, suitable for LTE system In, including base station and terminal, wherein,

Base station is used for by sending smart synchronized tracking reference symbol to terminal in the guard band of down channel;

Terminal is used to receive smart synchronized tracking reference symbol by the guard band in down channel.

Another aspect of the invention provides a kind of base station, and suitable for LTE system, the base station includes sending mould Block, the sending module are used for by sending smart synchronized tracking reference symbol to terminal in the guard band of down channel.

Another aspect of the invention provides a kind of terminal, and suitable for LTE system, the terminal includes receiving mould Block, the receiving module are used to receive smart synchronized tracking reference symbol by the guard band in down channel.

Technical scheme is not take up actually making due to smart synchronized tracking reference symbol is mapped on guard band With frequency band, the interference to adjacent area can be substantially reduced, increases available resources, allows the design of new carrier wave more flexible.

Brief description of the drawings

Fig. 1 is the schematic diagram that frequency band is distributed in background technology.

Fig. 2 is the schematic diagram of 4 port common reference symbols in background technology.

Fig. 3 is the flow chart of smart synchronized tracking in the embodiment of the present invention.

Fig. 4 is one of mapping schematic diagram of smart synchronized tracking reference symbol in the embodiment of the present invention one.

Fig. 5 is two of the mapping schematic diagram of smart synchronized tracking reference symbol in the embodiment of the present invention one.

Fig. 6 is one of mapping schematic diagram of smart synchronized tracking reference symbol in the embodiment of the present invention two.

Fig. 7 is two of the mapping schematic diagram of smart synchronized tracking reference symbol in the embodiment of the present invention two.

Fig. 8 is the structural representation of the mapped system of smart synchronized tracking reference symbol in the embodiment of the present invention.

Fig. 9 is architecture of base station schematic diagram in the embodiment of the present invention.

Figure 10 is terminal structure schematic diagram in the embodiment of the present invention.

Embodiment

The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

Fig. 3 is the flow chart of smart synchronized tracking in the embodiment of the present invention.As shown in figure 3, the flow comprises the following steps:

Step 301, in LTE system, utilize master sync signal(Primary Synchronization Signal, PSS)And auxiliary synchronous signals(Secondary Synchronization Signal, SSS)Initial synchronisation is carried out, cell is completed and searches Rope process, obtain cell I D.

Step 302, essence synchronization is carried out using smart synchronized tracking reference symbol, time-frequency compensation is carried out to reception signal.

Step 303, carry out descending each control channel, including Physical Broadcast Channel(Physical Broad Channel, PBCH), physical mixing retransmission indicating chanel(Physical Hybrid ARQIndicator Channel, PHICH), physics control Format indication channel processed(Physical Control FormatIndicator Channel, PCFICH)Controlled with physical down Channel(Physical Downlink Control Channel, PDCCH)Detection.

Step 304, carry out downstream data channel, such as Physical Downlink Shared Channel(Physical Downlink Shared Channel, PDSCH)Detection.

Step 305, it is to prevent clock drift, periodically synchronizes tracking using smart synchronized tracking reference symbol.

In this process, it is necessary to carry out essence synchronously using smart synchronized tracking reference symbol, two are described below specifically in fact Apply example.

As shown in Figure 4 and Figure 5, in the mapping scheme of the first smart synchronized tracking reference symbol, a width of BW of system distribution tape, The a width of BWu of band of frequency band is wherein actually used, reserves bandwidth BW r respectively at the wide both ends of system distribution tape as guard band.

Base station is synchronous to terminal, the essence by sending smart synchronized tracking reference symbol in the guard band BWr of down channel Track reference symbol is taken on guard band close to actual use frequency band BWu one end.

The bandwidth that the smart synchronized tracking reference symbol takes is less than the 1/2 of guard band bandwidth, and smart synchronized tracking is with reference to symbol Number two symbols of Time Slot Occupancy each in time domain, 2 RE are spaced on frequency domain.

I, base station interval TTI(Transmission time interval, subframe)Once smart synchronized tracking reference symbol, wherein i are big for transmission In the positive integer equal to 1.

As shown in Figure 6 and Figure 7, in the mapping scheme of second of smart synchronized tracking reference symbol, a width of BW of system distribution tape, The a width of BWu of band of frequency band is wherein actually used, reserves bandwidth BW r respectively at the wide both ends of system distribution tape as guard band.

Base station is synchronous to terminal, the essence by sending smart synchronized tracking reference symbol in the guard band BWr of down channel Track reference symbol is taken on guard band close to actual use frequency band BWu one end.

The bandwidth that the smart synchronized tracking reference symbol takes is less than the 1/2 of guard band bandwidth, and smart synchronized tracking is with reference to symbol Number one symbol of Time Slot Occupancy each in time domain, takes continuous 12 RE on frequency domain.

I, base station interval TTI sends once smart synchronized tracking reference symbol, and wherein i is the positive integer more than or equal to 1.

To realize above-mentioned flow, the invention provides two embodiments of the mapped system of smart synchronized tracking reference symbol.

One embodiment as shown in figure 8, the system suitable for LTE system, including base station 801 and terminal 802.

The base station is used for by sending smart synchronized tracking reference symbol to terminal in the guard band of down channel, further For sending the smart synchronized tracking reference symbol close to one end of actual use frequency band on guard band, it is further used for Use the 1/2 bandwidth transmission essence for being less than guard band bandwidth synchronous close to one end of actual use frequency band on guard band Track reference symbol, it is further used for i, interval TTI and sends once smart synchronized tracking reference symbol, be further used in time domain Upper each two symbols of Time Slot Occupancy, 2 RE transmissions smart synchronized tracking reference symbols are spaced on frequency domain.

The terminal is used to receive smart synchronized tracking reference symbol by the guard band in down channel, is further used for The smart synchronized tracking reference symbol is received close to one end of actual use frequency band on guard band, is further used in protection frequency Take and use 1/2 bandwidth less than guard band bandwidth to receive the smart synchronized tracking ginseng close to one end of actual use frequency band Symbol is examined, is further used for i, interval TTI and sends once smart synchronized tracking reference symbol, be further used in time domain each Two symbols of Time Slot Occupancy, 2 RE receptions smart synchronized tracking reference symbols are spaced on frequency domain.

Second embodiment of the mapped system of smart synchronized tracking reference symbol is close with one embodiment, both areas It is not:

Base station is further used in time domain one symbol of each Time Slot Occupancy, and continuous 12 RE hairs are taken on frequency domain Send the smart synchronized tracking reference symbol.

Terminal is further used in time domain one symbol of each Time Slot Occupancy, and continuous 12 RE are taken on frequency domain and are connect Receive the smart synchronized tracking reference symbol.

Present invention also offers the two of base station embodiment.

In one embodiment, as shown in figure 9, the base station includes sending module, the sending module is used for by descending The guard band of channel sends smart synchronized tracking reference symbol to terminal, is further used on guard band close to actual use One end of frequency band sends the smart synchronized tracking reference symbol, is further used on guard band close to actual use frequency band One end uses 1/2 bandwidth less than guard band bandwidth to send the smart synchronized tracking reference symbol, is further used for being spaced i Individual TTI sends once smart synchronized tracking reference symbol, is further used in time domain two symbols of each Time Slot Occupancy, in frequency domain Upper 2 RE in interval send the smart synchronized tracking reference symbol.

Second embodiment of base station is close with one embodiment, and both differences are:The sending module of base station enters One step is used for each one symbol of Time Slot Occupancy in time domain, taken on frequency domain continuous 12 RE send the essence synchronization with Track reference symbol.

Present invention also offers the two of terminal embodiment.

In one embodiment, as shown in Figure 10, the terminal includes receiving module, and the receiving module is used for by descending The guard band of channel receives smart synchronized tracking reference symbol, is further used on guard band close to actual use frequency band One end receives the smart synchronized tracking reference symbol, is further used for adopting close to one end of actual use frequency band on guard band The smart synchronized tracking reference symbol is received with 1/2 bandwidth less than guard band bandwidth, is further used for being spaced i TTI Send once smart synchronized tracking reference symbol, be further used in time domain two symbols of each Time Slot Occupancy, on frequency domain between The smart synchronized tracking reference symbol is received every 2 RE.

Second embodiment of terminal is close with one embodiment, and both differences are:The receiving module of terminal enters One step is used for each one symbol of Time Slot Occupancy in time domain, taken on frequency domain continuous 12 RE receive the essence synchronization with Track reference symbol.

Technical scheme is not take up actually making due to smart synchronized tracking reference symbol is mapped on guard band With frequency band, the interference to adjacent area can be substantially reduced, increases available resources, allows the design of new carrier wave more flexible.

It should be noted that:Only to illustrate rather than limitation, the present invention is also not limited to above-mentioned above example Citing, all do not depart from the technical scheme of the spirit and scope of the present invention and its improvement, and it all should cover the right in the present invention In claimed range.

Claims (12)

  1. A kind of 1. mapping method of smart synchronized tracking reference symbol, suitable for LTE system, it is characterised in that base station by The guard band of down channel sends smart synchronized tracking reference symbol to terminal, realizes smart synchronized tracking;
    Wherein, i, base station interval TTI sends once smart synchronized tracking reference symbol, and wherein i is the positive integer more than or equal to 1;
    The smart synchronized tracking reference symbol is taken on guard band close to one end of actual use frequency band;
    The bandwidth that the smart synchronized tracking reference symbol takes is less than the 1/2 of guard band bandwidth.
  2. 2. the mapping method of a kind of smart synchronized tracking reference symbol according to claim 1, it is characterised in that the essence is same Track reference symbol each two symbols of Time Slot Occupancy in time domain are walked, 2 RE are spaced on frequency domain.
  3. 3. the mapping method of a kind of smart synchronized tracking reference symbol according to claim 1, it is characterised in that the essence is same Track reference symbol each one symbol of Time Slot Occupancy in time domain is walked, continuous 12 RE are taken on frequency domain.
  4. A kind of 4. mapped system of smart synchronized tracking reference symbol, suitable for LTE system, it is characterised in that including base station and Terminal, wherein,
    Base station is used for by sending smart synchronized tracking reference symbol to terminal in the guard band of down channel;
    Terminal is used to receive smart synchronized tracking reference symbol by the guard band in down channel;
    Wherein, base station is further used for i, interval TTI transmissions once smart synchronized tracking reference symbol, and wherein i is more than or equal to 1 Positive integer;
    Terminal is further used for i, interval TTI and receives once smart synchronized tracking reference symbol;
    Base station is further used on guard band sending the smart synchronized tracking with reference to symbol close to one end of actual use frequency band Number;
    Terminal is further used on guard band receiving the smart synchronized tracking with reference to symbol close to one end of actual use frequency band Number;
    Base station is further used for using 1/2 less than guard band bandwidth close to one end of actual use frequency band on guard band Bandwidth send the smart synchronized tracking reference symbol;
    Terminal is further used for using 1/2 less than guard band bandwidth close to one end of actual use frequency band on guard band Bandwidth receive the smart synchronized tracking reference symbol.
  5. 5. the mapped system of a kind of smart synchronized tracking reference symbol according to claim 4, it is characterised in that base station enters one Walk for each two symbols of Time Slot Occupancy in time domain, 2 RE are spaced on frequency domain and send the smart synchronized tracking with reference to symbol Number;
    Terminal is further used in time domain two symbols of each Time Slot Occupancy, and 2 RE are spaced on frequency domain and receive the essence together Walk track reference symbol.
  6. 6. the mapped system of a kind of smart synchronized tracking reference symbol according to claim 4, it is characterised in that base station enters one Walk for each one symbol of Time Slot Occupancy in time domain, continuous 12 RE are taken on frequency domain and send the smart synchronized tracking Reference symbol;
    Terminal is further used in time domain one symbol of each Time Slot Occupancy, and continuous 12 RE are taken on frequency domain and receive institute State smart synchronized tracking reference symbol.
  7. 7. a kind of base station, suitable for LTE system, it is characterised in that the base station includes sending module, and the sending module is used In by sending smart synchronized tracking reference symbol to terminal in the guard band of down channel;
    Wherein, the sending module is further used for interval i TTI transmission once smart synchronized tracking reference symbol, wherein i is big In the positive integer equal to 1;
    The sending module be further used on guard band close to one end of actual use frequency band send the essence it is synchronous with Track reference symbol;
    The sending module, which is further used for using close to one end of actual use frequency band on guard band, is less than guard band 1/2 bandwidth of bandwidth sends the smart synchronized tracking reference symbol.
  8. 8. a kind of base station according to claim 7, it is characterised in that the sending module is further used in time domain often Individual two symbols of Time Slot Occupancy, 2 RE transmissions smart synchronized tracking reference symbols are spaced on frequency domain.
  9. 9. a kind of base station according to claim 7, it is characterised in that the sending module is further used in time domain often Individual one symbol of Time Slot Occupancy, continuous 12 RE are taken on frequency domain and send the smart synchronized tracking reference symbol.
  10. 10. a kind of terminal, suitable for LTE system, it is characterised in that the terminal includes receiving module, the receiving module For receiving smart synchronized tracking reference symbol by the guard band in down channel;
    Wherein, the receiving module is further used for interval i TTI reception once smart synchronized tracking reference symbol, wherein i is big In the positive integer equal to 1;
    The receiving module be further used on guard band close to one end of actual use frequency band receive the essence it is synchronous with Track reference symbol;
    The receiving module, which is further used for using close to one end of actual use frequency band on guard band, is less than guard band 1/2 bandwidth of bandwidth receives the smart synchronized tracking reference symbol.
  11. 11. a kind of terminal according to claim 10, it is characterised in that the receiving module is further used in time domain Two symbols of each Time Slot Occupancy, 2 RE receptions smart synchronized tracking reference symbols are spaced on frequency domain.
  12. 12. a kind of terminal according to claim 10, it is characterised in that the receiving module is further used in time domain One symbol of each Time Slot Occupancy, continuous 12 RE are taken on frequency domain and receive the smart synchronized tracking reference symbol.
CN201310042573.6A 2013-02-01 2013-02-01 A kind of mapping method, system and the device of smart synchronized tracking reference symbol CN103974407B (en)

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WO2015139287A1 (en) 2014-03-21 2015-09-24 华为终端有限公司 Method for detecting device-to-device signal, user equipment, and base station

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CN101689872A (en) * 2008-07-07 2010-03-31 联发科技股份有限公司 Method for receiving and transmitting data in communication system of multi-band orthogonal frequency division multiplexing accession and communication apparatus using the same method
CN102118756A (en) * 2009-12-31 2011-07-06 中兴通讯股份有限公司 Carrier aggregation method and dynamic spectrum allocation method
CN102547720A (en) * 2010-12-08 2012-07-04 中兴通讯股份有限公司 Method and system for increasing descending transmission bandwidth of wireless access network

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CN101689872A (en) * 2008-07-07 2010-03-31 联发科技股份有限公司 Method for receiving and transmitting data in communication system of multi-band orthogonal frequency division multiplexing accession and communication apparatus using the same method
CN102118756A (en) * 2009-12-31 2011-07-06 中兴通讯股份有限公司 Carrier aggregation method and dynamic spectrum allocation method
CN102547720A (en) * 2010-12-08 2012-07-04 中兴通讯股份有限公司 Method and system for increasing descending transmission bandwidth of wireless access network

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