CN107197525A - Lift the method and device of MBMS capacity - Google Patents
Lift the method and device of MBMS capacity Download PDFInfo
- Publication number
- CN107197525A CN107197525A CN201710252760.5A CN201710252760A CN107197525A CN 107197525 A CN107197525 A CN 107197525A CN 201710252760 A CN201710252760 A CN 201710252760A CN 107197525 A CN107197525 A CN 107197525A
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- China
- Prior art keywords
- frame
- sub
- signal
- mbsfn
- special subframe
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- 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
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
-
- 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
-
- 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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
Abstract
The invention discloses a kind of method and device of lifting MBMS capacity.Methods described includes：S101, is configured to send the special subframe of synchronizing signal and/or measurement signal in wireless sub-frame；The special subframe is one below：Unicast sub-frame, the MBSFN sub-frame comprising uni-cast portion and the MBSFN sub-frame with the synchronous signal sequence being pre-configured with；S102, downlink synchronous signal or channel are sent in the special subframe according to the configuration information being pre-configured with.Method and device realizes the transmission of synchronizing signal and/or measurement signal in MBSFN scenes by improving the configuration of frame structure in the present invention, so that the down-going synchronous and measurement problem in MBSFN scenes are effectively solved, so as to lift MBMS power system capacities.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of method and device of lifting MBMS capacity.
Background technology
Multicast/multicast single-frequency network network (MBSFN, Multicast-Broadcast Single Frequency Network)
It is required that receiving the identical waveform sent from multiple cells simultaneously, UE (User Equipment, user terminal) is received
Multiple MBSFN cells can be just considered as a big cell by machine.In addition, UE not only will not by adjacent cell transmission minizone
Interference, and will benefit from the superposition of the signal from multiple MBSFN cells.Moreover, the advanced UE such as G-RAKE
Receiver technology can also solve the problems, such as the time difference of multipath transmisstion, so as to eliminate intra-cell interference.
MBSFN is divided into two kinds：The MBSFN of the special carrier and MBSFN with unicast (Unicast) mixed carrier.Current LTE
(Long Term Evolution, Long Term Evolution) is mainly accomplished that mixed carrier MBSFN.In the MBSFN sub-frame of mixed carrier
The the 1st and the 2nd symbol using routine CP (Cyclic Prefix, cyclic prefix), and retain unicast pilot, can be used for PDCCH
(Physical Downlink Control Channel, Physical Downlink Control Channel), PCFICH (Physical Control
Format Indicator Channel, Physical Control Format Indicator Channel) and PHICH (Physical Hybrid ARQ
Indicator Channel, physical mixed automatic re-transmission indicating channel) etc. channel transmission.Other symbols in subframe are used for
MBSFN signals are transmitted.MBSFN patterns except sharing carrier wave with unicast signal, another MBSFN patterns are special carriers
(Dedicated-Carrier, DC) MBSFN, this pattern is adapted to exclusive carrier wave deployment, it is not necessary to and unicast signal multiplexing exists
Together.LTE DC MBSFN use 7.5kHz subcarrier spacings, so symbol lengths are the two of 15kHz subcarrier spacing systems
Times.LTE specification do not fully achieve 7.5kHz subcarrier spacing (no signaling come define indicate use this pattern, therefore
Can not realize), at least to Rel-10 versions, LTE only complete support 15kHz subcarrier spacing, namely above-mentioned and unicast
The MBSFN patterns of mixed carrier.
There was only subframe 1/2/3/6/7/8 (being directed to FDD (FDD)) or son in existing LTE protocol, in each radio frames
Frame 3/4/7/8/9 (being directed to TDD (time division duplex)) is configurable to MBSFN sub-frame.But need configuration more in some scenes
Subframe be MBSFN sub-frame.For example eMBMS is carried using SDL (Supplementary downlink carrier) carrier waves
(enhanced Multimedia Broadcast Multicast Service, multimedia broadcast multi-broadcasting business) business.In order to
Avoid wasting the up-link capacity in FDD UL/DL carrier waves, all eMBMS business should all concentrate on some SDL carrier waves as far as possible
It is upper to send.In addition, MBSFN sub-frame can be without uni-cast portion and CRS, for sending MBMS.
If subframe 0/4/5/9 or subframe 0/1/5/6 all can be configured to MBSFN sub-frame, or, MBSFN sub-frame is without single
Broadcast part, will there are problems that UE it is how synchronous and/or.These problems had both influenced whether the reception of UE MBMSs,
Also UE cell switching is influenced whether.Solved the above problems accordingly, it would be desirable to design a kind of scheme, so as to lift MBMS
The capacity of (Multimedia Broadcast Multicast Service, multimedia broadcast multi-broadcasting business).
The content of the invention
In order to overcome the defect of above-mentioned prior art, hold the technical problem to be solved in the present invention is to provide one kind lifting MBMS
The method and device of amount, the capacity to lift MBMS.
In order to solve the above technical problems, a kind of method of lifting MBMS capacity in the present invention, for base station, methods described
Including：
It is configured to send the special subframe of synchronizing signal and/or measurement signal in wireless sub-frame；The special subframe
For one below：Unicast sub-frame, the MBSFN sub-frame comprising uni-cast portion and with the synchronous signal sequence being pre-configured with
MBSFN sub-frame；
In the special subframe downlink synchronous signal or channel are sent according to the configuration information being pre-configured with.
Alternatively, the synchronizing signal and/or measurement signal include one below：It was found that signal, cell reference signals, master
Synchronizing signal/auxiliary synchronous signals, CSI pilot tones, the proprietary pilot tones of descending UE, down control channel and the synchronizing signal sequence being pre-configured with
Row；
It is described send downstream signal or channel according to the configuration information that is pre-configured with the special subframe before, also wrap
Include：
The configuration information for the special subframe being pre-configured with is sent to user terminal；The configuration information includes sending
Configuration and measurement configuration.
Alternatively, the special subframe for being configured to send synchronizing signal and/or measurement signal in wireless sub-frame；
Downstream signal or channel are sent according to the configuration information being pre-configured with the special subframe, including：
If subcarrier spacing is 15kHz, the special subframe is configured in wireless sub-frame；Pressed in the special subframe
Downstream signal or channel are sent according to the configuration information being pre-configured with；
If the non-15kHz of subcarrier spacing, configures the unicast sub-frame in wireless sub-frame；Pressed on the unicast sub-frame
Downstream signal or channel are sent according to configuration information；
If the downstream signal or channel configure the unicast sub-frame to find signal in wireless sub-frame；Described
On unicast sub-frame downstream signal or channel are sent according to configuration information.
Alternatively, the special subframe for being configured to send synchronizing signal and/or measurement signal in wireless sub-frame, tool
Body includes：
Wireless sub-frame 0 and/or wireless sub-frame 5 are configured to the special subframe.
Specifically, if the special subframe is the MBSFN sub-frame for including the synchronous signal sequence being pre-configured with；It is described in institute
State before sending downlink synchronous signal or channel according to the configuration information that is pre-configured with special subframe, in addition to：
According to the MBSFN area identifications of each MBSFN cells, to each MBSFN cell configurations synchronous signal sequence.
In order to solve the above technical problems, a kind of device of lifting MBMS capacity in the present invention, for base station, described device
Including：
Configuration module, the special subframe for being configured to send synchronizing signal and/or measurement signal in wireless sub-frame；
The special subframe is one below unicast sub-frame, the MBSFN sub-frame comprising uni-cast portion and believed with the synchronization being pre-configured with
The MBSFN sub-frame of number sequence；
Sending module, in the special subframe according to the configuration information that is pre-configured with send downlink synchronous signal or
Channel.
Alternatively, the synchronizing signal and/or measurement signal include one below：It was found that signal, cell reference signals, master
Synchronizing signal/auxiliary synchronous signals, CSI pilot tones, the proprietary pilot tones of descending UE, down control channel and the synchronizing signal sequence being pre-configured with
Row；
The sending module, the configuration information of the special subframe for being additionally operable to be pre-configured with is sent to user terminal；
The configuration information includes send configuration and measurement is configured.
Alternatively, described device also includes judge module；
The judge module, if being 15kHz for subcarrier spacing, triggers the configuration module and matches somebody with somebody in wireless sub-frame
Put the special subframe；
If the non-15kHz of subcarrier spacing, trigger the configuration module and the unicast sub-frame is configured in wireless sub-frame；Institute
State sending module and send downstream signal or channel according to configuration information on the unicast sub-frame；
If the downstream signal or channel trigger the configuration module and configure described in wireless sub-frame to find signal
Unicast sub-frame；The sending module sends downstream signal or channel on the unicast sub-frame according to configuration information.
Alternatively, the configuration module, specifically for wireless sub-frame 0 and/or wireless sub-frame 5 are configured into the special son
Frame.
Specifically, if the special subframe is the MBSFN sub-frame for including the synchronous signal sequence being pre-configured with；Described device
Also include：
Synchronous signal sequence generation module, for the MBSFN area identifications according to each MBSFN cells, to each MBSFN cells
Configure synchronous signal sequence.
The present invention has the beneficial effect that：
Method and device is by improving the configuration of frame structure in the present invention, realize in MBSFN scenes synchronizing signal and/
Or the transmission of measurement signal, so that the down-going synchronous and measurement problem in MBSFN scenes are effectively solved, so as to lift MBMS systems
System capacity, is particularly suitable for use in Standalone scenes and subframe 0/5 is configured as the scene lifting MBMS capacity of MBSFN sub-frame
Effect, while ensure signal synchronous transfer and measurement.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the method for lifting MBMS capacity in the embodiment of the present invention；
Fig. 2 is the MBSFN frame structure schematic diagrames with unicast mixed carrier in the embodiment of the present invention；
Fig. 3 is the frame structure schematic diagram of the MBSFN sub-frame comprising uni-cast portion in the embodiment of the present invention；
Fig. 4 is a kind of apparatus structure schematic diagram of lifting MBMS capacity in the embodiment of the present invention.
Embodiment
In order to solve problem of the prior art, the invention provides a kind of method and device of lifting MBMS capacity, below
With reference to accompanying drawing and embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein
Only to explain the present invention, the present invention is not limited.
As shown in figure 1, a kind of method of lifting MBMS capacity in the embodiment of the present invention, for base station, methods described includes：
S101, is configured to send the special subframe of synchronizing signal and/or measurement signal in wireless sub-frame；It is described special
Subframe is one below：Unicast sub-frame, the MBSFN sub-frame comprising uni-cast portion and with the synchronous signal sequence being pre-configured with
MBSFN sub-frame；
S102, downlink synchronous signal or channel are sent in the special subframe according to the configuration information being pre-configured with.
The embodiment of the present invention realizes synchronizing signal and/or measurement in MBSFN scenes by improving the configuration of frame structure
The transmission of signal, so that the down-going synchronous and measurement problem in MBSFN scenes are effectively solved, so as to lift MBMS systems appearance
Amount, is particularly suitable for use in Standalone scenes and subframe 0/5 is configured as the scene of MBSFN sub-frame and lifts the effect of MBMS capacity
Really, while ensureing synchronous transfer and the measurement of signal.
The embodiment of the present invention is described in detail with instantiation below.
The main transmission by realizing synchronizing signal and/or measurement signal in MBSFN scenes of the invention, to reach lifting
MBMS capacity, when realizing, can include：
Step 1, base station is configured to send the special subframe of synchronizing signal and/or measurement signal in wireless sub-frame；Will
The configuration of special unicast sub-frame, and/or with MBSFN part with subframe send uni-cast portion, and/or include uni-cast portion
The configuration of MBSFN sub-frame, and/or the MBSFN sub-frame for including new synchronous signal sequence (synchronous signal sequence being pre-configured with)
Configuration be sent to UE.
It is above-mentioned specific identical with special meaning.
That is, described send downstream signal or channel in the special subframe according to the configuration information being pre-configured with
Before, it can also include：
The configuration information for the special subframe being pre-configured with is sent to user terminal；The configuration information includes sending
Configuration and measurement configuration.
Specifically, the specific unicast sub-frame or uni-cast portion are mainly used in sending DRS (Discovery
Reference Signal, find signal), and/or CRS (Cell Reference Signal, cell reference signals), and/or
PSS (Primary Synchronization Signal, master sync signal)/SSS (Secondary Synchronization
Signal, auxiliary synchronous signals), and/or CSI-RS (CSI pilot tones), and/or descending UE-specific RS (the proprietary pilot tones of UE),
And/or down control channel, and/or the new downstream signal (synchronous signal sequence being pre-configured with) for defining or changing, it is used for
Descending synchronization, cell discovery, measurement or demodulation function, and/or, support up sending function (such as up scheduling grant, HARQ
Confirm and TPC).The necessary downstream signal or channel that the specific unicast sub-frame or uni-cast portion are sent do not include PDSCH.But
It is to be not excluded for PDSCH to be multiplexed situation about sending with subframe.
Each subframe (i.e. wireless sub-frame) of traditional mixing MBSFN sub-frame includes uni-cast portion and MBSFN parts.Pass
The each subframe of special MBSFN sub-frame of system does not include uni-cast portion.In the present invention, the specific unicast sub-frame or including list
The MBSFN sub-frame for broadcasting part carries out regular transmission according to configuration, for functions such as synchronous and measurements.Specific unicast sub-frame or
MBSFN sub-frame including uni-cast portion is not limited to only configure in subframe 0 or subframe 5.And other subframes are configured as with mixing
MBSFN sub-frame or special MBSFN sub-frame or unicast sub-frame, and how to configure, the present invention is not limited.
The MBSFN sub-frame of the downstream signal comprising new or modification can be special MBSFN sub-frame or bag
Mixing MBSFN sub-frame containing uni-cast portion.
The specific unicast sub-frame, and/or uni-cast portion, and/or the configuration information comprising MBSFN sub-frame can include
Send configuration and/or measurement configuration.Send configuration can be with identical with measurement configuration, or is subset relation, such as measurement configuration
It can be the subset of send configuration.
Send configuration mainly includes at least one following：Transmission cycle, transmission skew, transmission duration, uni-cast portion are in son
Duration or symbolic number in frame.
Measurement configuration is main including at least one following：Measurement period, measurement skew, measurement duration, uni-cast portion are in son
Duration or symbolic number in frame.
The configuration information can also include transmission cycle and/or skew of signal etc..When the transmission cycle or inclined of signal
It is that base station or UE know altogether to move, then does not need base station to be then forwarded to UE.
Base station and UE both sides are configured to when the specific unicast sub-frame, and/or uni-cast portion, and/or MBSFN sub-frame
All appoint, or the clearly defined value of agreement (base station and UE are known about), then do not need base station to reinform to UE.For example it is synchronous
Signal is sent once per 5ms, respectively in subframe 0 and subframe 5, and base station and UE sides both know about the send configuration of synchronizing signal, then this
The configuration information base station of sample need not retransmit UE.
Above-mentioned configuration information is sent to UE by base station by RRC signaling or descending control signaling DCI.It is preferred that, base station leads to
Cross RRC signaling and above- mentioned information is sent to UE.
Base station can also be sent out using DRS or DMTC (DRS Measurement Timing Configuration) configuration
Send the unicast sub-frame, and/or the MBSFN sub-frame including uni-cast portion.DRS configuration includes DRS duration, DMTC's
Configuration includes at least one of：Cycle, skew and measurement duration.
For example, being unicast sub-frame by DRS transmission subframe or DMTC sub-frame configurations, sent out in DRS subframes or DMTC subframes
Send the signal.Now, the transmission or measurement configuration of the specific unicast sub-frame are equal to DRS sub-frame configurations or DMTC subframes
Configuration.
No matter all descending sub frames in radio frames whether be configured to special MBSFN sub-frame or other subframe types,
Or part descending sub frame is configured as special MBSFN sub-frame or other subframe types, the specific unicast sub-frame in radio frames
Or uni-cast portion is all transmitted according to configuration.Now, subframe where the specific unicast sub-frame or uni-cast portion is no longer pressed
It is transmitted according to other subframe types.
For example, all descending sub frames are configured to special MBSFN sub-frame, including subframe 0, subframe 1, subframe 2 ....And
Specific unicast sub-frame or uni-cast portion configuration is in subframe 0, subframe 40, subframe 80 ..., when actually sending, in subframe 0, son
Frame 40, subframe 80 ... is sent according to specific unicast sub-frame or uni-cast portion configuration, without matching somebody with somebody according to special MBSFN sub-frame
Put transmission.
Or, when the MBSFN sub-frame that certain subframe is configured as specific unicast sub-frame or specifically includes uni-cast portion,
The subframe can not be configured as special MBSFN sub-frame, and/or mixing MBSFN sub-frame, and/or other types subframe again.
Further, when certain subframe is configured as specific unicast sub-frame, the subframe can not be configured as special MBSFN again
Subframe and mixing MBSFN sub-frame；When certain subframe is configured as the specific MBSFN sub-frame for including uni-cast portion, the subframe can not
Special MBSFN sub-frame or unspecific mixing MBSFN sub-frame is configured as again；
Step 2, downlink synchronous signal or channel are sent according to the configuration information being pre-configured with the special subframe.
That is, base station is in the specific unicast sub-frame, and/or the uni-cast portion, and/or bag that are sent with MBSFN parts with subframe
Under MBSFN sub-frame containing uni-cast portion, and/or the MBSFN sub-frame comprising new or modification downstream signal are sent according to configuration
Row signal or channel.
The downstream signal or channel that the specific unicast sub-frame or uni-cast portion or MBSFN sub-frame are sent mainly are wrapped
Include：DRS, and/or CRS, and/or PSS/SSS, and/or CSI-RS, and/or descending UE-specific RS, and/or descending control
Channel processed, and/or the new downstream signal for defining or changing, find for descending synchronization, cell, measure or demodulation function, and/
Or support up sending function.
The necessary downstream signal or channel that the specific unicast sub-frame or uni-cast portion are sent do not include PDSCH.But
Be not excluded for can with or cannot PDSCH with subframe be multiplexed send situation.
Above-mentioned configuration can be send configuration or measurement configuration.Send configuration can be identical with measurement configuration, or is subset
Relation.Explanation in above-mentioned steps 1 is may be referred to when implementing.
No matter all descending sub frames in radio frames be configured to MBSFN sub-frame type or part descending sub frame by with
MBSFN sub-frame or other subframe types are set to, the unicast sub-frame or uni-cast portion are all transmitted according to configuration.
For example, the transmission cycle of unicast sub-frame or uni-cast portion be 40/80/160ms, send skew for 0ms to (cycle-
1) ms (it is assumed here that being 0ms skews), a length of 1-6ms during transmission.It is assumed here that the cycle of transmission is 40ms, it is 0ms to send skew,
A length of 1ms during transmission.
If configuration unicast sub-frame or uni-cast portion be unicast sub-frame, 0~1ms, 40~41,80~81 ..., configuration
Above-mentioned signal or channel are sent for unicast sub-frame, and no matter whether all descending sub frames are configured to MBSFN sub-frame in radio frames
Or other subframes.As shown in Figure 3.
If configuration unicast sub-frame or uni-cast portion be to include the MBSFN sub-frame of uni-cast portion, 0~1ms, 40~
41st, 80~81 ..., be configured to the MBSFN sub-frame comprising uni-cast portion and send above-mentioned signal or channel, no matter in radio frames whether
All descending sub frames are configured to special or mixing MBSFN sub-frame or other subframe types.As shown in Figure 3；Or, when 0~
1ms, 40~41,80~81 ..., when being unicast sub-frame, then send above-mentioned signal or channel according to unicast sub-frame.When 0~1ms,
40~41,80~81 ..., when being MBSFN sub-frame, then be configured to the MBSFN sub-frame comprising uni-cast portion send above-mentioned signal or
Channel.
If base station sends the unicast sub-frame and/or uni-cast portion using DRS or DMTC configuration, then base station handle
DRS subframes or DMTC sub-frame configurations are unicast sub-frame or MBSFN sub-frame comprising uni-cast portion to send downstream signal or channel.
It is 15kHz (be directed to MBSFN sub-frame) for subcarrier spacing, preferably specific unicast sub-frame, and/or includes unicast
Partial MBSFN sub-frame sends the descending signal or channel according to configuration.Reason is the subcarrier spacing for 15kHz, is had
The sub-carrier number that effect symbol duration and each RB are included is consistent with prior art, and legacy downstream signals or channel can be in unicasts
Subframe or uni-cast portion are sent.
Be 7.5kHz or smaller (be directed to MBSFN sub-frame) for subcarrier spacing, preferably specific unicast sub-frame according to
Put the transmission descending signal or channel.Unicast sub-frame is sent according to subcarrier spacing for 15kHz.
Especially for long CP structure (be equal to be more than 33.33us), as the non-15kHz of subcarrier spacing (such as
7.5kHz or lower), MBSFN sub-frame is not suitable for sending the tradition such as CRS comprising uni-cast portion (one or more OFDM symbols)
Downstream signal or channel, because such case subframe structure and symbol lengths are all changed, traditional down channel or letter
Number be not suitable for sending in this MBSFN sub-frame.Now, way preferably is the special unicast sub-frame of configuration to send biography
The downstream signal or down control channel of system.
Sent for traditional DRS, DRS according to the cycle of setting, skew and duration.DRS can be in unicast sub-frame
Or MBSFN sub-frame is sent.If the DRS subframes of configuration fall on unicast sub-frame or fallen in MBSFN sub-frame, DRS is at both
It can be sent in subframe type.In fact, prior art does not consider that subcarrier is 7.5kHz or other smaller subcarriers
During interval, how DRS sends.In addition, for subcarrier 15kHz, but the symbolic number in subframe is when changing, and how is DRS
Transmission is not also solved.Such scheme can then solve this point.That is, being unicast by DRS subframes or DMTC sub-frame configurations
Frame, or, DRS is sent by specific unicast sub-frame.
That is, the special subframe for being configured to send synchronizing signal and/or measurement signal in wireless sub-frame；
Downstream signal or channel are sent according to the configuration information being pre-configured with the special subframe, including：
If subcarrier spacing is 15kHz, the special subframe is configured in wireless sub-frame；Pressed in the special subframe
Downstream signal or channel are sent according to the configuration information being pre-configured with；
If the non-15kHz of subcarrier spacing, configures the unicast sub-frame in wireless sub-frame；Pressed on the unicast sub-frame
Downstream signal or channel are sent according to configuration information；
If the downstream signal or channel configure the unicast sub-frame to find signal in wireless sub-frame；Described
On unicast sub-frame downstream signal or channel are sent according to configuration information.
Traditional each cell of MBSFN regions is according to oneself different cell ID(36.211) PSS/SSS is produced
Sequence, therefore above- mentioned information can not be in the transmission of MBSFN parts.So in the prior art, subframe 0 and subframe 5 be can not by with
MBSFN sub-frame is set to, can be for transmission PSS/SSS and measurement signal or control channel.For Standalone scenes or
Subframe 0/5 is configured to the scenes such as MBSFN sub-frame, and MBSFN cells need to have down-going synchronous or measurement capability, and MBSFN
The PSS/SSS sequences of region or retaining zone each cell transmission are different.
In this programme, MBSFN cells are according to MBSFN area identifications(3GPP agreements 36.211) is new to generate
MBSFN synchronizing sequences (synchronous signal sequence being pre-configured with), namely each cell of MBSFN regions is according to identical MBSFN
Area identification generates identical synchronizing sequence, can be found for MBSFN cells and down-going synchronous.
New synchronizing sequence generating mode can include：
To MBSFN area identificationsStill can be using cell ID beforePacket mode, i.e.,Value is 0
To 167,Value is 0 to 2.I.e.：Due toSpan is 0~503,Value model
Enclose for 0~255.Therefore, forIt is not everyWithValued combinations can be traversed, and can have resource wave
Take.
Or, new group technology is used to match MBSFN area identification sizes.For example, i.e.Value is 0 to 127,Value is 0 to 1.I.e.：Or, i.e.,Value is 0 to 63,Value is 0 to 3.I.e.：
Or, existing PSS is not used (for ID in transmission group i.e.Value) and SSS (be for transmission group IDValue)
The two synchronizing sequences carry out the synchronous mode of classification, i.e., not by the way of packet.And use unique synchronizing sequence mode
To obtain synchronization, for example, MBSFN SS sequences are only existed, without being subdivided into PSS and SSS, packet side is at this time just not present
Formula.
The root factor u (Root index u) of MBSFN PSS sequences is identical with the root factor of conventional cell PSS sequences.Especially
It is applied to MBSFN area identifications and cell IDIdentical packet mode or MBSFNWith conventional cellValue model
Enclose identical scene.
For example,U=25；U=29；U=34；
Or, the root factor u (Root index u) of MBSFN PSS sequences takes for the root factor of conventional cell PSS sequences
The subset of value.
For example,Value is 0 to 1.U=25；U=29；Or,U=29；u
=34；Etc..
Or, according to new packet mode or MBSFN synchronizing sequences, according to the new synchronous sequence of sequence producing method generation
Row.For example, when PSS has 2 possible values, u values choose 2 possible values in existing 3 values.Or, according to sub- load
Wave spacing, to generate the PSS/SSS sequences of new length.For example, for 7.5kHz subcarrier spacings, it is necessary to longer PSS/
The sequence of SSS sequences, such as 62*2 length.
New MBSFN synchronizing signals (synchronous signal sequence being pre-configured with) can produce length according to the method described above and be
62 sequence, then adds 50 in both sides, is mapped on 72 subcarriers；
For smaller than 15kHz subcarrier spacing such as 7.5kHz or 3.75kHz, each RB includes more subcarriers,
For example for 7.5kHz, each RB includes 24 subcarriers.MBSFN synchronizing sequences can be produced as follows：
It is primarily based on MBSFN area identificationsTo generate the sequence that length is 62.Adding 50 in both sides again turns into length
Spend the sequence for 72.
The sequence that the length is 62 or 72 is then based on, it is longer to generate by the way of interpolation or repetition or broach
MBSFN synchronizing sequences.Interpolation or repetition can be according to subcarrier or according to RB or according to 62 bit lengths or according to 72 bit lengths
Enter row interpolation or repetition.
For example, for 7.5kHz, each RB includes 24 subcarriers, the PSS/SSS sequences that length is 62 are firstly generated
(s1, s2, s3 ..., s62) interleaves 0 by subcarrier and (such as s1,0, s2,0, s3,0, s4,0 ..., s62,0) or repeated (such as
S1, s1, s2, s2, s3, s3, s4, s4 ..., s62, s62) or according to RB repeat or insert 0 (repeat such as s1, s2, s3 ...,
S12, s1, s2, s3 ..., s12, s13, s14, s15 ... .s62), insert 0 as (s1, s2, s3 ... s12,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0, s13, s14, s15 ...) or according to whole sequence repeat or mend 0 (such as s1,
s2,...s62,s1,s2,...,s62)。
The transmission cycle of MBSFN synchronizing signals can be 5ms or 10ms, preferably can subframe 0, and/or subframe 5,
And/or sent in subframe 1, and/or subframe 6.
Further, last of preferable first time slot in subframe 0 and/or subframe 5 of MBSFN synchronizing signals
Sent in OFDM symbol, and/or, MBSFN synchronizing signals are in subframe 0 and/or the penultimate of first time slot of subframe 5
Sent in OFDM symbol.
Or, MBSFN synchronizing signals are preferably sent in the 3rd OFDM symbol of subframe 1 and/or subframe 6, and/
Or, MBSFN synchronizing signals are sent in last OFDM symbol of subframe 0 and/or subframe 5.
That is, the downstream signal of the new definition sent in MBSFN sub-frame, which can also include MBSFN, finds signal
(MBSFN-DRS), MBSFN-DRS can include MBSFN synchronizing signals and MBSFN reference signals (MBSFN-RS).MBSFN-
DRS is used for the discovery of MBSFN cells, down-going synchronous and channel measurement.Signal in MBSFN-DRS is all according to generation.MBSFN-DRS
Send configuration can include the transmission cycle, send skew, and/or send duration etc., accordingly, and UE lateral roots are all according to the measurement of configuration
Phase, measurement skew and/or measurement duration are measured.
Based on the above method, present invention further propose that a kind of device of lifting MBMS capacity.
As shown in figure 4, a kind of device of lifting MBMS capacity in the embodiment of the present invention, for base station, described device includes：
Configuration module 210, the special son for being configured to send synchronizing signal and/or measurement signal in wireless sub-frame
Frame；The special subframe is one below：Unicast sub-frame, the MBSFN sub-frame comprising uni-cast portion and same with what is be pre-configured with
Walk the MBSFN sub-frame of signal sequence；
Sending module 220, for sending down-going synchronous letter according to the configuration information being pre-configured with the special subframe
Number or channel.
Wherein, the synchronizing signal and/or measurement signal include one below：It was found that signal, cell reference signals, master are together
Walk signal/auxiliary synchronous signals, CSI pilot tones, the proprietary pilot tones of descending UE, down control channel and the synchronizing signal sequence being pre-configured with
Row；
The sending module, the configuration information of the special subframe for being additionally operable to be pre-configured with is sent to user terminal；
The configuration information includes send configuration and measurement is configured.
Furtherly, described device also includes judge module；
The judge module, if being 15kHz for subcarrier spacing, triggers the configuration module and matches somebody with somebody in wireless sub-frame
Put the special subframe；
If the non-15kHz of subcarrier spacing, trigger the configuration module and the unicast sub-frame is configured in wireless sub-frame；Institute
State sending module and send downstream signal or channel according to configuration information on the unicast sub-frame；
If the downstream signal or channel trigger the configuration module and configure described in wireless sub-frame to find signal
Unicast sub-frame；The sending module sends downstream signal or channel on the unicast sub-frame according to configuration information.
Further say, the configuration module, it is described special specifically for wireless sub-frame 0 and/or wireless sub-frame 5 are configured to
Use subframe.
Specifically, if the special subframe is the MBSFN sub-frame for including the synchronous signal sequence being pre-configured with；Described device
Also include：
Synchronous signal sequence generation module, for the MBSFN area identifications according to each MBSFN cells, to each MBSFN cells
Configure synchronous signal sequence.
Device is by improving the configuration of frame structure in the embodiment of the present invention, realize in MBSFN scenes synchronizing signal and/
Or the transmission of measurement signal, so that the down-going synchronous and measurement problem in MBSFN scenes are effectively solved, so as to lift MBMS systems
System capacity, is particularly suitable for use in Standalone scenes and subframe 0/5 is configured as the scene lifting MBMS capacity of MBSFN sub-frame
Effect, while ensure signal synchronous transfer and measurement.
At this it should be noted that device may be referred to the above method when implementing in the embodiment of the present invention, herein
Do not repeat.
Although This application describes the particular example of the present invention, those skilled in the art can not depart from the present invention generally
Variant of the invention is designed on the basis of thought.
Those skilled in the art are under the inspiration that the technology of the present invention is conceived, on the basis of present invention is not departed from, also
Various improvement can be made to the method for the present invention, this still falls within the scope and spirit of the invention.
Claims (10)
1. a kind of method of lifting MBMS capacity, it is characterised in that for base station, methods described includes：
It is configured to send the special subframe of synchronizing signal and/or measurement signal in wireless sub-frame；The special subframe be with
It is one of lower：Unicast sub-frame, the MBSFN sub-frame comprising uni-cast portion and of the MBSFN with the synchronous signal sequence being pre-configured with
Frame；
In the special subframe downlink synchronous signal or channel are sent according to the configuration information being pre-configured with.
2. the method as described in claim 1, it is characterised in that the synchronizing signal and/or measurement signal include one below：
It was found that signal, cell reference signals, master sync signal/auxiliary synchronous signals, CSI pilot tones, the proprietary pilot tones of descending UE, descending control letter
Road and the synchronous signal sequence being pre-configured with；
It is described send downstream signal or channel according to the configuration information that is pre-configured with the special subframe before, in addition to：
The configuration information for the special subframe being pre-configured with is sent to user terminal；The configuration information includes send configuration
With measurement configuration.
3. the method as described in claim 1, it is characterised in that described to be configured to send synchronizing signal in wireless sub-frame
And/or the special subframe of measurement signal；In the special subframe according to the configuration information that is pre-configured with send downstream signal or
Channel, including：
If subcarrier spacing is 15kHz, the special subframe is configured in wireless sub-frame；According to pre- in the special subframe
The configuration information first configured sends downstream signal or channel；
If the non-15kHz of subcarrier spacing, configures the unicast sub-frame in wireless sub-frame；On the unicast sub-frame according to
Confidence breath sends downstream signal or channel；
If the downstream signal or channel configure the unicast sub-frame to find signal in wireless sub-frame；In the unicast
In subframe downstream signal or channel are sent according to configuration information.
4. the method as described in any one in claim 1-3, it is characterised in that described that hair is configured in wireless sub-frame
The special subframe of synchronizing signal and/or measurement signal is sent, is specifically included：
Wireless sub-frame 0 and/or wireless sub-frame 5 are configured to the special subframe.
5. method as claimed in claim 4, it is characterised in that if the special subframe is to include the synchronizing signal being pre-configured with
The MBSFN sub-frame of sequence；It is described in the special subframe according to the configuration information that is pre-configured with send downlink synchronous signal or
Before channel, in addition to：
According to the MBSFN area identifications of each MBSFN cells, to each MBSFN cell configurations synchronous signal sequence.
6. a kind of device of lifting MBMS capacity, it is characterised in that for base station, described device includes：
Configuration module, the special subframe for being configured to send synchronizing signal and/or measurement signal in wireless sub-frame；It is described
Special subframe is one below：Unicast sub-frame, the MBSFN sub-frame comprising uni-cast portion and with the synchronizing signal sequence being pre-configured with
The MBSFN sub-frame of row；
Sending module, for sending downlink synchronous signal or letter according to the configuration information being pre-configured with the special subframe
Road.
7. device as claimed in claim 6, it is characterised in that the synchronizing signal and/or measurement signal include one below：
It was found that signal, cell reference signals, master sync signal/auxiliary synchronous signals, CSI pilot tones, the proprietary pilot tones of descending UE, descending control letter
Road and the synchronous signal sequence being pre-configured with；
The sending module, the configuration information of the special subframe for being additionally operable to be pre-configured with is sent to user terminal；It is described
Configuration information includes send configuration and measurement is configured.
8. device as claimed in claim 6, it is characterised in that described device also includes judge module；
The judge module, if being 15kHz for subcarrier spacing, triggers the configuration module and institute is configured in wireless sub-frame
State special subframe；
If the non-15kHz of subcarrier spacing, trigger the configuration module and the unicast sub-frame is configured in wireless sub-frame；The hair
Module is sent to send downstream signal or channel according to configuration information on the unicast sub-frame；
If the downstream signal or channel trigger the configuration module and the unicast are configured in wireless sub-frame to find signal
Subframe；The sending module sends downstream signal or channel on the unicast sub-frame according to configuration information.
9. the device as described in any one in claim 6-8, it is characterised in that the configuration module, specifically for by nothing
Line subframe 0 and/or wireless sub-frame 5 are configured to the special subframe.
10. device as claimed in claim 9, it is characterised in that if the special subframe is comprising the synchronization letter being pre-configured with
The MBSFN sub-frame of number sequence；Described device also includes：
Synchronous signal sequence generation module, for the MBSFN area identifications according to each MBSFN cells, to each MBSFN cell configurations
Synchronous signal sequence.
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| CN106465173A (en) * | 2014-05-27 | 2017-02-22 | Lg电子株式会社 | Method and apparatus for performing measurement using discovery reference signal (DRS) in wireless communication system |
| WO2017010762A1 (en) * | 2015-07-10 | 2017-01-19 | 엘지전자 주식회사 | Method and device for transreceiving discovery reference signal in wireless access system supporting unlicensed band |
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