CN102223604A - Subframe configuring method and system - Google Patents
Subframe configuring method and system Download PDFInfo
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- CN102223604A CN102223604A CN2010101511612A CN201010151161A CN102223604A CN 102223604 A CN102223604 A CN 102223604A CN 2010101511612 A CN2010101511612 A CN 2010101511612A CN 201010151161 A CN201010151161 A CN 201010151161A CN 102223604 A CN102223604 A CN 102223604A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a subframe configuring method. The method comprises the following steps that: a base station reconfigures a unicast subframe into a multimedia broadcast single frequency network (MBSFN) subframe; and the base station sends a configuring signaling of the reconfigured MBSFN subframe to user equipment (UE). The invention also discloses a subframe configuring system. By the method and the system, the transmission of unicast service is not affected and the base station saves electricity and energy.
Description
Technical field
The present invention relates to the field, base station in the mobile communication long-term evolution system, relate in particular to a kind of sub-frame configuration method and system.
Background technology
In mobile communication, subscriber equipment (UE, User Equipment) power consumption is paid attention to very much, universal terrestrial radio access network (UTRA, Universal Terrestrial Radio Access Network) and evolved universal terrestrial radio access network (E-UTRA, Evolved Universal Terrestrial RadioAccess Network) etc. all developed discontinuous efficiently transmission (DTX, DiscontinuousTransmission) and discontinuous reception (DRX, Discontinuous Reception) technology, reduce power consumption, reach purpose of energy saving.
So-called DTX technology, be meant in a communication process, because mobile subscriber's reality only has little time to be used for conversation, most of the time is not all transmitted speech information, when the mobile subscriber does not converse, the equipment of relevant conversation can enter closed condition in the portable terminal, have only to during paging cycle, portable terminal just receives internet message, judge whether to exist information updating, upgrade if exist, portable terminal just carries out uplink synchronous, network just can know that this portable terminal is paged object, and then sets up being connected of this portable terminal and calling terminal; Therefore, in the paging cycle gap, network will not send internet message to portable terminal, if all send internet message to portable terminal, not only can cause waste, and intrasystem interference is increased the weight of, so-called discontinuous transmission that Here it is system resource.So-called DRX technology, be meant that mobile phone sleeps always, every several " multiframes ", the time period that was about as much as 1/8th seconds just wakes up once, system can indicate the mobile phone per second to wake up for four times and check whether incoming call (DRX2) is arranged, or approximately per second once (DRX9) wake up, this practice sacrifice be to detect required time of incoming call, in the DRX operation, processor will cut out receiver and make the sleep pattern that oneself enters low-power consumption, and a timer internal can restart processor through after the suitable length of one's sleep.
But, but carry no weight for a long time for the power consumption of base station, relevant issues such as energy-conservation.Serious day by day along with energy issue of world, Climatic issues, the performance of base station at aspects such as energy-conservation, low-carbon (LC)s is subjected to the attention of operator gradually.Ericsson is to third generation partner program (3GPP, the 3rd GenerationPartnership Project) " R10 RAN1/4 Enhanced cell DTX for LTE " (WID=RP-091431) suggestion of setting up the project has been submitted in plenary session to, this suggestion has obtained the support of numerous operators such as Vodafone and equipment vendor in plenary session, at present at Long Term Evolution (LTE, Long Term Evolution) during standard is worked out with base station energy-saving as a research topic, and carry out the relevant Research on energy saving of base station.
By the actual motion analysis to the LTE base station, find that the power of LTE base station mainly consumes aspect three: (1) base band data is handled: mainly expend at the base band data of received signal and handle; (2) base station radio-frequency part: mainly expend on the power amplifier of transmitter; (3) other: such as being used for active heat radiation etc.
Handle for base band data, the saving of power mainly relies on signal processing algorithm or realizes the retrofit of hardware, and for example the higher algorithm process data of utilization ratio reach purpose of power saving thereby just can reduce redundant computation; For the base station radio-frequency part, the power that much lose on power amplifier have nothing to do with the instantaneous output of power amplifier, at this moment, have only power amplifier turned off just and can avoid power loss.If can make the time long enough of base station shutdown, then the raising of base station energy-saving and power amplification efficiency all can be very obvious; If but close radio frequency, just mean that the base station can not send any information again, therefore only come this method of power saving perfect inadequately by closing radio frequency, can not only guarantee the transmission but also the power and energy saving of the data of subscriber equipment.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of sub-frame configuration method and system, neither influences the transmission of unicast service, can also realize the power and energy saving of base station simultaneously.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of sub-frame configuration method, comprising:
The base station is changeed unicast sub and is configured to multimedia broadcast-multicast service Single Frequency Network (MBSFN) subframe, and the configuration signal that will change the MBSFN subframe of configuration sends to subscriber equipment (UE), and afterwards, handle changeing the MBSFN subframe that disposes described base station.
In the said method, described unicast sub is the base station unicast sub of definite free time.
In the said method, described base station is configured to the unicast sub commentaries on classics before the MBSFN subframe, and this method also comprises:
The base station sends to UE with the data centralization scheduling of UE in one or more unicast sub.
In the said method, described base station sends to UE with the scheduling of the data centralization of UE and is specially in one or more unicast sub:
Under mode of frequency division duplexing, dispatch data centralization the base station in the descending sub frame #0 of unicast sub and #5;
When the resource of described descending sub frame #0 and #5 is transmitted unicast service in the sub-district inadequately, use descending sub frame #4 and #9;
When the resource of #0, #4, #5 and #9 was enough transmitted unicast service in the sub-district, other subframes were by the free time;
When the resource of #0, #4, #5 and #9 is transmitted unicast service in the sub-district inadequately, increase subframe.
In the said method, this method also comprises:
The base station judges whether to occur idle unicast sub according to the data volume of unicast service, when the user's data amount in inherent one or more unicast sub of a period of time remains unchanged always, determines that remaining unicast sub is idle unicast sub.
In the said method, the described configuration signal that will change the MBSFN subframe of configuration sends to UE and is specially:
The base station sends to UE by system information block 2 (SIB2) or SIB13 with the configuration signal that changes the MBSFN subframe of configuration.
In the said method, described processing is specially:
The base station does not send cell special reference (CRS) in the MBSFN subframe of changeing configuration; Perhaps on previous or preceding two OFDMs (OFDM) symbol, send described CRS, and keep remaining OFDM symbol for empty.
In the said method, described base station does not send CRS and is specially in the MBSFN subframe of changeing configuration:
All OFDM that the MBSFN subframe of configuration will be changeed in the base station remain sky, do not send CRS in previous or preceding two OFDM symbols of the MBSFN subframe of commentaries on classics configuration, and do not carry physics hybrid ARQ indicating channel (PHICH), Physical Control Format Indicator Channel (PCFICH), Physical Downlink Control Channel (PDCCH), radio frequency is closed in the base station.
In the said method, describedly on previous or preceding two OFDM symbols, send described CRS, and to keep remaining OFDM symbol be that sky is specially:
The base station sends CRS on previous or preceding two OFDM symbols of the MBSFN subframe of changeing configuration, and carrying PHICH, PCFICH, PDCCH, do not send CRS on the remaining OFDM symbol, do not send MBSFN reference signal and multimedia broadcast and multicast service data yet, keep remaining OFDM symbol for empty, radio frequency is closed in the base station on the OFDM of remaining sky symbol.
In the said method, this method also comprises:
The base station does not send the configuration signal of the MBSFN subframe of changeing configuration to many sub-districts coordination entity.
The present invention also provides a kind of sub-frame configuration system, comprising: base station, subscriber equipment; Wherein,
The base station is used for unicast sub changeed being configured to the MBSFN subframe, and the configuration signal that will change the MBSFN subframe of configuration sends to subscriber equipment, afterwards, handles changeing the MBSFN subframe that disposes;
Subscriber equipment is used to receive the configuration signal of the MBSFN subframe of the commentaries on classics configuration that the base station sends.
In the said system, described base station also is used for the data centralization scheduling of UE is sent to UE in one or more unicast sub; Data volume according to unicast service judges whether to occur idle unicast sub, when the user's data amount in inherent one or more unicast sub of a period of time remains unchanged always, determines that remaining unicast sub is idle unicast sub; In the MBSFN subframe of changeing configuration, do not send CRS; Perhaps on previous or preceding two OFDM symbols, send described CRS, and keep remaining OFDM symbol for empty.
Realization sub-frame configuration method and system provided by the invention, the unicast sub commentaries on classics of free time is configured to the MBSFN subframe, changeed the subframe that is configured to the MBSFN subframe and no longer continued to send cell special reference, perhaps only in previous or preceding two OFDM symbols, send cell special reference, thereby make the base station can close radio frequency, reach the purpose of power and energy saving; And the dispatching principle that utilizes the present invention to propose can realize that as much as possible base station power-saving is energy-conservation so that the base station exists the chance of idle unicast sub to increase.
In addition, the base station has the domination right to the MBSFN subframe of changeing configuration among the present invention, utilize this domination right, when the base station sends MBMS, the base station is had the right will change at any time the MBSFN subframe that disposes and is configured to unicast sub once more, utilize the unicast sub transmission unicast service data after disposing, shortened the base station like this with the time of changing between unicast sub and the MBSFN subframe, improve the efficient of changeing layoutprocedure, simultaneously can also make things convenient for the base station as required MBSFN subframe and unicast sub to be changed, send different business datums.
Description of drawings
Fig. 1 realizes the schematic flow sheet of sub-frame configuration method for the present invention;
Fig. 2 sends to the data centralization scheduling embodiment schematic flow sheet of UE in one or more unicast sub for base station of the present invention;
Fig. 3 realizes the structural representation of sub-frame configuration system for the present invention.
Embodiment
Basic thought of the present invention is: the base station is configured to multimedia broadcast-multicast service Single Frequency Network (MBSFN) subframe with the unicast sub commentaries on classics, and afterwards, the configuration signal that the MBSFN subframe of configuration will be changeed in described base station sends to subscriber equipment (UE).
Below by drawings and the specific embodiments the present invention is described in further detail again.
Two kinds of subframes are arranged: a kind of MBSFN of being subframe, another kind of right and wrong MBSFN subframe in LTE; Wherein, non-MBSFN subframe generally is used to transmit the unicast service data, all sends CRS in each subframe, according to the regulation of related protocol, also needs to send CRS during even without the unicast service data; The MBSFN subframe is mainly used in transmitting multimedia broadcast multicast service (MBMS, Multimedia Broadcast MulticastService), and wherein a spot of MBSFN subframe also is used to transmit other business, for example positioning service etc.; The MBSFN subframe structure is: regulation MBSFN has 12 OFDM (OFDM in LTE R8/9, Orthogonal Frequency Division Multiplexing) symbol, wherein previous or preceding two the OFDM symbols of subframe are used to carry Physical Downlink Control Channel (PDCCH, PhysicalDownlink Control Channel) and some other physical channel, remaining OFDM symbol is used for MBMS transmission in the subframe, wherein send CRS in previous or preceding two the OFDM symbols of MBSFN subframe, Physical Multicast Channel (PMCH when the MBSFN subframe, Physical Multicast Channel) is scheduled for when sending MBMS, in the PMCH of this MBSFN subframe, sends the MBSFN reference signal.
Analyze by prior art LTE, can know, sub-district special reference signal (CRS, Cell-specific reference signals) be at each non-multimedia broadcast-multicast service Single Frequency Network (MB SFN, Multimedia Broadcast multicast service Single Frequency Network) all sends in Chuan Shu the descending sub frame, that is to say, even in the descending sub frame of certain non-MBSFN transmission, do not have the unicast service data to be sent out, but CRS still needs to be sent out, because CRS also has the effect of measuring for UE.
Suppose in the descending sub frame of certain above-mentioned non-MBSFN transmission, not send CRS, and network side is not notified UE yet, do not send CRS in the described descending sub frame, UE can be because do not receive CRS on described descending sub frame so, and think the failure of own reception information, thereby cause UE to measure failure.When the channel quality of UE descended, UE can think that oneself is positioned at cell edge at present, so need carry out the adjacent cell channel mass measurement, mainly measures the channel quality of adjacent sub-district, is used for judging whether carrying out channel switching etc.
The invention provides a kind of sub-frame configuration method, Fig. 1 is the schematic flow sheet that the present invention realizes the sub-frame configuration method, and as shown in Figure 1, this method may further comprise the steps:
Step 101, the base station sends to UE with the data centralization scheduling in one or more unicast sub;
Concrete, dispatching principle is passed through in the base station, the data centralization of subscriber equipment is dispatched send to UE in one or more unicast sub; The data volume of and subscriber equipment less when subscriber equipment more after a little while, one or more subframe just can realize the transfer of data of subscriber equipment, remaining unicast sub just can keep the free time of long period, and the base station promotes the probability that occurs idle unicast sub in the sub-district by dispatching principle; If the unicast service data of the data owner subscriber equipment of subscriber equipment;
Step 102 judges whether idle unicast sub to occur, if then execution in step 103, if not, then execution in step 101;
Concrete, the base station judges whether to occur idle unicast sub according to the data volume of unicast service, method is as follows: because the base station also sends the data centralization scheduling in one or more unicast sub, if, just remaining unicast sub can be regarded as idle unicast sub so the data volume of the subscriber equipment in inherent one or more unicast sub of a period of time remains unchanged always; In addition, this scheme can be adopted in the base station in the less special time period of some users, the 0:00 to 6:00 of every day for example since in this time period in the sub-district user of conversation fewer, the probability of unicast sub that the free time occurs is bigger; If idle unicast sub, then execution in step 103, if unicast sub do not occur, then execution in step 101;
Step 103, the base station is configured to the MBSFN subframe with the unicast sub commentaries on classics of free time;
Concrete, the base station is changeed the unicast sub of free time by the parameter MBSFN-SubframeConfig on the system information block 2 (SIB2, System Information Block 2) and is configured to the MBSFN subframe;
In LTE, Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) under the pattern, can change what be configured to the MBSFN subframe in the unicast sub is that subframe numbers is the descending sub frame of #1, #2, #3, #6, #7, #8, time division duplex (TDD, Time Division Duplex) under the pattern, can change the subframe that is configured to the MBSFN subframe in the unicast sub is that subframe numbers is the descending sub frame of #0, #4, #5, #9;
The configuration signal that step 104, base station will be changeed the MBSFN subframe of configuration sends to UE;
Concrete, the base station with the unicast sub of free time change be configured to the MBSFN subframe after, the configuration signal that the MBSFN subframe that disposes will be changeed in the base station sends to UE by SIB2 or SIB13; The content of this configuration signal is which unicast sub is configured to the MBSFN subframe by commentaries on classics, and by this configuration signal, the base station informs that UE is configured to the unicast sub of MBSFN subframe by commentaries on classics; In actual applications, when the base station sends to UE at the configuration signal of the MBSFN subframe that will change configuration, also send the MBSFN subframe that sub-district self just disposes originally.
In actual applications, the base station is for the MBSFN subframe of changeing configuration, Cyclic Prefix (the CP that can keep this subframe, Cyclic Prefix) constant, only these subframes are called the MBSFN subframe, allow the UE of R8 or R9 know that this subframe is that the MBSFN subframe gets final product, so just can in the MBSFN subframe of changeing configuration, not send CRS, and do not transmit unicast service;
Step 105, the base station does not send cell special reference in the MBSFN subframe of changeing configuration, perhaps send cell special reference on previous or preceding two OFDM symbols, and keeps remaining OFDM symbol for empty;
Concrete, all OFDM that the MBSFN subframe of configuration will be changeed in the base station remain sky, wherein to remain the empty meaning be not send any data message in this OFDM symbol of base station to the OFDM symbol, do not send CRS in previous or preceding two OFDM symbols of the MBSFN subframe of commentaries on classics configuration, and do not carry Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indicatou Channel), physical mixed ARQ indicating channel (PHICH, Physical Hybrid ARQ Indicator Channel), Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel), thereby the OFDM symbol that continuous sky in the MBSFN subframe of changeing configuration, can occur, when the base station is empty at the OFDM symbol, close radio frequency, but the power and energy saving; At this moment, under fdd mode, UE preferentially uses descending sub frame #0, the #4 in the unicast sub, the CRS among #5, the #9 to measure, be not configured to the MBSFN subframe because descending sub frame #0, #4, #5, #9 can not changeed in the present embodiment, UE also can use among descending sub frame #1, #2 in the unicast sub, #3, #6, #7, the #8 not the CRS that is configured in the unicast sub of MBSFN subframe by commentaries on classics to measure in addition;
Do not send any information because change the MBSFN subframe of configuration, for a sub-district, the quantity of the subscriber equipment in the sub-district and the data volume of subscriber equipment more after a little while, the normal transmission of unicast service is realized by the configuration pattern in the base station; Concrete grammar is: UE sends the sub-frame of uplink of data to the base station, need carry out some restrictions, this restriction briefly is exactly, when the data volume of the quantity of community user equipment and subscriber equipment more after a little while, the base station can be dispatched UE and be transmitted at the sub-frame of uplink of agreement, specifically arranges by base station configuration; Change the pattern of configuration MBSFN subframe by base station configuration and realize the rule of base station according to the feedback information transmission of UE upstream data, the base station can send to UE with feedback information just on a descending unicast sub, that is: one of base station configuration satisfies the up-downgoing transfer of data and satisfies the repeatedly pattern of uplink retransmission, the descending sub frame of using in the pattern is not changeed being configured to the MBSFN subframe and getting final product;
Perhaps, the base station sends CRS on previous or preceding two OFDM symbols of the MBSFN subframe of changeing configuration, and carries PHICH, PCFICH, PDCCH, does not send CRS on the remaining OFDM symbol, simultaneously do not send MBSFN reference signal and MBMS data yet, keep remaining OFDM symbol for empty; Radio frequency can be closed in the base station on the OFDM of remaining continuous a plurality of skies symbol like this, reaches the purpose of power and energy saving; The MBSFN reference signal is when MBMS transmission is professional among the PMCH of agreement regulation, the CRS that configuration sends;
This method can also may further comprise the steps:
Step 106, base station do not send the MBSFN sub-frame information of commentaries on classics configuration to MCE;
In the prior art, the MBSFN subframe of carrying MBMS business is to be disposed by many sub-districts coordination entity (MCE, Multi-cell/multicast Coordination Entity), and configuration information is sent to relevant base station.If will changeing the MBSFN subframe of configuration, the base station sends to MCE, MCE just can know the base station is configured to the MBSFN subframe with which unicast sub commentaries on classics like this, the unicast sub of the free time of all base stations is identical in MCE finds certain limit, and when having the MBMS business demand that needs transmission, MCE can utilize the MBSFN subframe of changeing configuration to send MBMS, at this moment, if the MBSFN sub-frame configuration that the base station is thought commentaries on classics configuration that will be utilized by MCE once more is during for unicast sub, just must be mutual with MCE, inform that MCE will change professional release of MBMS on the MBSFN subframe that disposes, the MBSFN sub-frame configuration that the base station will be changeed configuration more as required is the unicast sub unicast traffic, but between base station and the MCE be alternately more slowly, the flexible configuration that is unfavorable for the base station, and influence sends the stability of the MBSFN subframe of changeing configuration;
And base station of the present invention does not send the MBSFN sub-frame information of commentaries on classics configuration to MCE, the base station just has the domination right of these being changeed the MBSFN subframe of configuration like this, utilize this domination right, have the right at any time these MBSFN subframes to be configured to unicast sub once more in the base station, utilize the unicast sub transmission unicast service data after disposing, so can shorten the time that change the MBSFN subframe of unicast sub and commentaries on classics configuration mutually the base station, reduce again the time of layoutprocedure, improve implementation efficiency; Can also make things convenient for simultaneously the base station as required the MBSFN subframe and the unicast sub of changeing configuration to be changed, send different business datums, perhaps utilize the MBSFN subframe of changeing configuration to send other business, for example the base station can send the MBMS business of single cell pattern in the MBSFN subframe of changeing configuration.
In order to realize that as much as possible base station energy-saving, the present invention propose a kind of dispatching method, the base station need send data to UE with the data dispatch of the subscriber equipment in the sub-district in one or more unicast sub in this dispatching method.When the data volume of subscriber equipment hour, just concentrate on scheduling in the unicast sub, if the data volume of subscriber equipment more for a long time, in a unicast sub, dispatch earlier, if when a unicast sub is used inadequately, in second unicast sub, dispatch again.
Fig. 2 is the implementation method that a specific embodiment that sends to UE in one or more unicast sub is dispatched with data centralization in the base station among Fig. 1, and as shown in Figure 2, this method may further comprise the steps:
Step 201, dispatch data centralization the base station in descending sub frame #0 and #5;
Concrete, in the present embodiment, preferentially dispatch the data centralization of subscriber equipment the base station in descending sub frame #0, #4, #5 and the #9 of unicast sub, and this is because among the present invention, under fdd mode, descending sub frame #0, #4, #5 and #9 can not changeed being configured to the MBSFN subframe; Generally, use descending sub frame #0 and #5 earlier, that is: dispatch the data centralization of subscriber equipment the base station in descending sub frame #0 and #5;
Step 202 when the resource of descending subframe #0 and #5 is transmitted unicast service in the sub-district inadequately, is used descending sub frame #4 and #9;
Concrete, when the resource of #0 and #5 subframe is used inadequately, can use descending sub frame #9 earlier, when the resource of #0, #5 and #9 is used inadequately, use descending sub frame #4;
Step 203 is enough transmitted unicast service in the sub-district when the resource of #0, #4, #5 and #9, and when promptly resource was enough, other subframes were by the free time; When the resource of #0, #4, #5 and #9 is transmitted unicast service in the sub-district inadequately, when promptly resource is not enough, increase subframe;
Concrete, the quantity of the subscriber equipment in the sub-district and the data volume of subscriber equipment more after a little while, for a sub-district, when descending sub frame #0, #4, #5 and #9 enough satisfied the transmission of unicast service in the sub-district, other unicast sub will be by the free time in the sub-district;
When the resource of descending subframe #0, #4, #5 and #9 is transmitted unicast service in the sub-district inadequately, increase the subframe among descending sub frame #1, #2, #3, #6, #7 and the #8 of unicast sub, get up unicast sub when scheduling as much as possible continuously in the base station.
This method at LTE in fdd mode, similar for tdd mode and said method, just descending sub frame #0, #4, #5 and #9 are become #0, #1, #5 and #6.
Utilize this dispatching principle, when the data volume of the quantity of the subscriber equipment of sub-district and subscriber equipment more after a little while, have idle unicast sub in the sub-district, the base station is changeed idle unicast sub and is configured to the MBSFN subframe, and the configuration signal that will change the MBSFN that disposes sends to UE; The base station does not send cell special reference in the MBSFN subframe of changeing configuration, perhaps on previous or preceding two OFDM symbols, send cell special reference, and keep remaining OFDM symbol for empty, thereby the base station is when the OFDM symbol is sky, closes radio frequency to realize the power and energy saving.
The early stage UE (as the UE of R8) of LTE is when running into the MBSFN subframe, only can receive the information on previous or preceding two OFDM symbols of MBSFN subframe, can the UE of R8 not had any impact like this, for example the transmission of the unicast service of the UE of R8 and reception, measurement etc.; When the UE of R9 runs into the MBSFN subframe,, so only can receive the information on previous or preceding two OFDM symbols of MBSFN subframe if described UE is the UE that the R9 of unicast service is only arranged; If described UE is receiving MBMS, the UE that perhaps has the MBMS ability, just can pass through multicast control channel (MCCH, MulticastControl Channel) information and Multicast Channel (MCH, Multicast Channel) schedule information (MSI, MCH scheduling information) knows whether the information in the MBSFN subframe needs to receive, so can the UE of R9 not had any impact, for example the UE of R9 receives and unicast traffic, the UE receiving multicast traffic of R9, and the measurement of the UE of R9 etc.
Because not influence of UE for R8/R9, therefore the solution of the present invention has good compatibility, and by this specific embodiment, with the unicast sub of free time change be configured to the MBSFN subframe after, the subframe that is transferred to the MBSFN subframe no longer continues to send CRS, perhaps only in previous or preceding two OFDM symbols, send CRS, thereby realize the base station power-saving purpose of energy saving.
The present invention is only at changeing the situation that is configured to the MBSFN subframe with the unicast sub of free time, for the MBSFN subframe of original just configuration in the sub-district still according to the predetermined processing of existing LTE agreement.
Be to realize that said method, the present invention also provide a kind of sub-frame configuration system, as shown in Figure 3, this system comprises base station 31, subscriber equipment 32: wherein,
Base station 31 is used for unicast sub changeed being configured to the MBSFN subframe, and the configuration signal that will change the MBSFN subframe that disposes sends to subscriber equipment 32;
Subscriber equipment 32 is used to receive the configuration signal of the MBSFN subframe of the commentaries on classics configuration that base station 31 sends;
Base station 31 also is used for according to dispatching principle the data centralization scheduling being sent to subscriber equipment 32 in one or more unicast sub; Data volume according to unicast service judges whether to occur idle unicast sub, and the data volume of the subscriber equipment in inherent one or more unicast sub of a period of time remains unchanged always, just thinks that remaining unicast sub is idle unicast sub; In the MBSFN subframe of changeing configuration, do not send CRS, keep all OFDM symbols to be sky; Perhaps on previous or preceding two OFDM symbols, send described CRS, and keep remaining OFDM symbol for empty.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a sub-frame configuration method is characterized in that, this method comprises:
The base station is changeed unicast sub and is configured to multimedia broadcast-multicast service Single Frequency Network (MBSFN) subframe, and the configuration signal that will change the MBSFN subframe of configuration sends to subscriber equipment (UE), and afterwards, handle changeing the MBSFN subframe that disposes described base station.
2. method according to claim 1 is characterized in that, described unicast sub is the base station unicast sub of definite free time.
3. method according to claim 1 and 2 is characterized in that, described base station is configured to the unicast sub commentaries on classics before the MBSFN subframe, and this method also comprises:
The base station sends to UE with the data centralization scheduling of UE in one or more unicast sub.
4. method according to claim 3 is characterized in that, described base station sends to UE with the scheduling of the data centralization of UE and is specially in one or more unicast sub:
Under mode of frequency division duplexing, dispatch data centralization the base station in the descending sub frame #0 of unicast sub and #5;
When the resource of described descending sub frame #0 and #5 is transmitted unicast service in the sub-district inadequately, use descending sub frame #4 and #9;
When the resource of #0, #4, #5 and #9 was enough transmitted unicast service in the sub-district, other subframes were by the free time;
When the resource of #0, #4, #5 and #9 is transmitted unicast service in the sub-district inadequately, increase subframe.
5. method according to claim 1 and 2 is characterized in that, this method also comprises:
The base station judges whether to occur idle unicast sub according to the data volume of unicast service, when the user's data amount in inherent one or more unicast sub of a period of time remains unchanged always, determines that remaining unicast sub is idle unicast sub.
6. method according to claim 1 is characterized in that, the described configuration signal that will change the MBSFN subframe of configuration sends to UE and is specially:
The base station sends to UE by system information block 2 (SIB2) or SIB13 with the configuration signal that changes the MBSFN subframe of configuration.
7. method according to claim 1 is characterized in that, described processing is specially:
The base station does not send cell special reference (CRS) in the MBSFN subframe of changeing configuration; Perhaps on previous or preceding two OFDMs (OFDM) symbol, send described CRS, and keep remaining OFDM symbol for empty.
8. method according to claim 7 is characterized in that, described base station does not send CRS and is specially in the MBSFN subframe of changeing configuration:
All OFDM that the MBSFN subframe of configuration will be changeed in the base station remain sky, do not send CRS in previous or preceding two OFDM symbols of the MBSFN subframe of commentaries on classics configuration, and do not carry physics hybrid ARQ indicating channel (PHICH), Physical Control Format Indicator Channel (PCFICH), Physical Downlink Control Channel (PDCCH), radio frequency is closed in the base station.
9. method according to claim 7 is characterized in that, describedly sends described CRS on previous or preceding two OFDM symbols, and to keep remaining OFDM symbol be that sky is specially:
The base station sends CRS on previous or preceding two OFDM symbols of the MBSFN subframe of changeing configuration, and carrying PHICH, PCFICH, PDCCH, do not send CRS on the remaining OFDM symbol, do not send MBSFN reference signal and multimedia broadcast and multicast service data yet, keep remaining OFDM symbol for empty, radio frequency is closed in the base station on the OFDM of remaining sky symbol.
10. method according to claim 1 is characterized in that, this method also comprises:
The base station does not send the configuration signal of the MBSFN subframe of changeing configuration to many sub-districts coordination entity.
11. a sub-frame configuration system is characterized in that, this system comprises: base station, subscriber equipment; Wherein,
The base station is used for unicast sub changeed being configured to the MBSFN subframe, and the configuration signal that will change the MBSFN subframe of configuration sends to subscriber equipment, afterwards, handles changeing the MBSFN subframe that disposes;
Subscriber equipment is used to receive the configuration signal of the MBSFN subframe of the commentaries on classics configuration that the base station sends.
12. system according to claim 11 is characterized in that, described base station also is used for the data centralization scheduling of UE is sent to UE in one or more unicast sub; Data volume according to unicast service judges whether to occur idle unicast sub, when the user's data amount in inherent one or more unicast sub of a period of time remains unchanged always, determines that remaining unicast sub is idle unicast sub; In the MBSFN subframe of changeing configuration, do not send CRS; Perhaps on previous or preceding two OFDM symbols, send described CRS, and keep remaining OFDM symbol for empty.
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| CN2010101511612A CN102223604B (en) | 2010-04-16 | 2010-04-16 | Subframe configuring method and system |
| PCT/CN2011/072461 WO2011127792A1 (en) | 2010-04-16 | 2011-04-06 | Method and system for configuring subframe |
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| CN2010101511612A CN102223604B (en) | 2010-04-16 | 2010-04-16 | Subframe configuring method and system |
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| CN102223604B (en) | 2013-11-06 |
| WO2011127792A1 (en) | 2011-10-20 |
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