CN102223604A - Subframe configuring method and system - Google Patents
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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 of base stations in a mobile communication long term evolution system, and in particular, to a subframe configuration method and system.
Background
In mobile communication, the power consumption of User Equipment (UE) is very important, and a Universal Terrestrial Radio Access Network (UTRA), an Evolved Universal Terrestrial Radio Access Network (E-UTRA), and the like have developed efficient Discontinuous Transmission (DTX) and Discontinuous Reception (DRX) technologies to reduce power consumption and achieve the purpose of saving energy.
The DTX technology is characterized in that in a communication process, because a mobile user actually has only a little time for conversation, and voice messages are not transmitted in most of the time, when the mobile user does not converse, a device related to conversation in a mobile terminal enters a closed state, and only when a paging cycle is reached, the mobile terminal receives network messages, judges whether information update exists or not, if the information update exists, the mobile terminal carries out uplink synchronization, and a network can know that the mobile terminal is a paged object, so that the connection between the mobile terminal and a calling terminal is established; therefore, the network will not send network messages to the mobile terminal during the paging cycle interval, and if the network messages are all transmitted to the mobile terminal, not only the system resources will be wasted, but also the interference in the system will be aggravated, which is called discontinuous transmission. By DRX technology, it is meant that the handset is sleeping all the time, waking up every few "frames" for a period of time equivalent to about one eighth of a second, and the system can instruct the handset to wake up four times a second to check for an incoming call (DRX2), or about once a second (DRX9), at the expense of the time required to detect an incoming call, and in DRX operation the processor will shut down the receiver and put itself into a low power sleep mode, and an internal timer will restart the processor after the appropriate sleep time has elapsed.
However, the power consumption and energy saving of the base station are not considered. With the increasing severity of the world energy problem and the climate problem, the performance of the base station in the aspects of energy saving, low carbon and the like is gradually valued by operators. Ericsson has filed a recommendation of R10 RAN1/4 Enhanced cell DTX for LTE (WID — 091431) to the third generation partnership Project (3 GPP) at the conference, and currently, base station energy saving has been regarded as a research topic in the standard formulation of Long Term Evolution (LTE) and research on related energy saving technologies of base stations is being conducted.
Through the actual operation analysis of the LTE base station, it is found that the power of the LTE base station is mainly consumed in three aspects: (1) and (3) baseband data processing: the method is mainly used for processing baseband data of received signals; (2) a base station radio frequency part: the method is mainly consumed on the power amplifier of the transmitter; (3) and (3) the other: such as for active heat dissipation, etc.
For baseband data processing, power saving mainly depends on a signal processing algorithm or realizes updating and improvement of hardware, for example, an algorithm with higher efficiency is utilized to process data, so that redundant calculation can be reduced, and the purpose of saving power is achieved; for the radio frequency part of the base station, much power lost on the power amplifier is irrelevant to the instantaneous output power of the power amplifier, and at the moment, the power loss can be avoided only by turning off the power amplifier. If the time for shutting down the base station is long enough, the energy saving of the base station and the improvement of the power amplifier efficiency are obvious; however, if the radio frequency is turned off, it means that the base station cannot send any information, so the method of saving power by turning off the radio frequency alone is not perfect, and cannot guarantee both data transmission and power saving of the user equipment.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a subframe configuration method and system, which do not affect the transmission of unicast service, and can also achieve power saving and energy saving of a base station.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a subframe configuration method, which comprises the following steps:
the method comprises the steps that a base station converts and configures a unicast subframe into a multimedia broadcast multicast service single frequency network (MBSFN) subframe, a configuration signaling of the configured MBSFN subframe is sent to User Equipment (UE), and then the base station processes the configured MBSFN subframe.
In the above method, the unicast subframe is an idle unicast subframe determined by the base station.
In the above method, before the base station reconfigures the unicast subframe as the MBSFN subframe, the method further includes:
and the base station schedules the data of the UE in one or more unicast subframes to send to the UE.
In the above method, the step of the base station collectively scheduling the data of the UE in one or more unicast subframes and sending the data to the UE specifically includes:
in a frequency division duplex mode, a base station centralizes data in downlink subframes #0 and #5 of a unicast subframe for scheduling;
when the resources of the downlink subframes #0 and #5 are not enough to transmit unicast service in a cell, using downlink subframes #4 and # 9;
when the resources of #0, #4, #5 and #9 are enough to transmit the unicast service in the cell, other subframes are idle;
when the resources of #0, #4, #5 and #9 are not enough to transmit unicast traffic in the cell, the subframes are increased.
In the above method, the method further comprises:
and the base station judges whether idle unicast subframes appear according to the data volume of the unicast service, and determines that the rest unicast subframes are idle unicast subframes when the data volume of the user in one or more unicast subframes is kept unchanged for a period of time.
In the above method, the sending the configuration signaling of the MBSFN subframe to the UE specifically includes:
the base station transmits configuration signaling of the reconfigured MBSFN subframe to the UE through the system information block 2(SIB2) or SIB 13.
In the method, the processing specifically comprises:
the base station does not transmit a cell-specific reference signal (CRS) in the MBSFN subframe transferred with the configuration; or transmitting the CRS on a previous one or two Orthogonal Frequency Division Multiplexing (OFDM) symbols and keeping the remaining OFDM symbols empty.
In the above method, the step of the base station not sending the CRS in the MBSFN subframe that is reconfigured specifically includes:
the base station keeps all OFDM of the MBSFN subframe to be configured to be empty, CRS is not sent in the first OFDM symbol or the first two OFDM symbols of the MBSFN subframe to be configured, a physical hybrid ARQ indicator channel (PHICH), a Physical Control Format Indicator Channel (PCFICH) and a Physical Downlink Control Channel (PDCCH) are not carried, and the base station closes the radio frequency.
In the foregoing method, the sending the CRS over the first one or two OFDM symbols and keeping the remaining OFDM symbols empty specifically includes:
and the base station transmits CRS on the first one or two OFDM symbols of the MBSFN subframe to be configured, carries PHICH, PCFICH and PDCCH, does not transmit CRS on the rest OFDM symbols, does not transmit MBSFN reference signals and multimedia broadcast multicast service data, keeps the rest OFDM symbols empty, and closes the radio frequency on the rest empty OFDM symbols.
In the above method, the method further comprises:
and the base station does not send the configuration signaling of the MBSFN subframe to the multi-cell coordination entity.
The invention also provides a subframe configuration system, comprising: a base station, a user equipment; wherein,
the base station is used for converting the unicast subframe into the MBSFN subframe, transmitting the configuration signaling of the converted MBSFN subframe to the user equipment, and then processing the converted MBSFN subframe;
and the user equipment is used for receiving the configuration signaling of the MBSFN subframe transferred with the configuration sent by the base station.
In the system, the base station is further configured to schedule the data of the UE in one or more unicast subframes and send the data to the UE; judging whether idle unicast subframes appear according to the data volume of the unicast service, and determining the rest unicast subframes to be idle unicast subframes when the data volume of users in one or more unicast subframes is kept unchanged for a period of time; not transmitting CRS in the MBSFN subframe subjected to configuration transfer; or transmitting the CRS on the first one or two OFDM symbols and keeping the rest OFDM symbols empty.
The method and the system for realizing the subframe configuration convert the idle unicast subframe into the MBSFN subframe, the subframe converted into the MBSFN subframe does not continuously send the cell special reference signal any more, or only sends the cell special reference signal in the previous one or two orthogonal frequency division multiplexing symbols, so that the base station can close the radio frequency and achieve the purposes of saving electricity and energy; moreover, by utilizing the scheduling principle provided by the invention, the opportunity that the base station has idle unicast subframes can be increased, and the power and energy conservation of the base station can be realized as much as possible.
In addition, the base station has the domination right for the MBSFN subframe which is allocated in a contra-rotating mode, and by utilizing the domination right, when the base station sends the MBMS, the base station has the right to allocate the MBSFN subframe which is allocated in a contra-rotating mode to the unicast subframe at any time, and the unicast subframe which is allocated is utilized to transmit unicast service data, so that the time for the base station to convert the unicast subframe and the MBSFN subframe is shortened, the efficiency of a contra-rotating process is improved, and meanwhile, the base station can conveniently convert the MBSFN subframe and the unicast subframe according to needs to send different.
Drawings
FIG. 1 is a schematic flow chart of a method for implementing subframe configuration according to the present invention;
FIG. 2 is a flowchart illustrating an embodiment of a base station scheduling data to be sent to a UE in one or more unicast subframes according to the present invention;
fig. 3 is a schematic structural diagram of a subframe configuration system according to the present invention.
Detailed Description
The basic idea of the invention is: the method comprises the steps that a base station converts and configures a unicast subframe into a multimedia broadcast multicast service single frequency network (MBSFN) subframe, and then the base station sends a configuration signaling of the converted and configured MBSFN subframe to User Equipment (UE).
The invention is further described in detail below with reference to the drawings and the specific embodiments.
There are two subframes in LTE: one is an MBSFN subframe, and the other is a non-MBSFN subframe; the non-MBSFN subframe is generally used for transmitting unicast service data, CRS is transmitted in each subframe, and according to the provisions of related protocols, CRS also needs to be transmitted even if no unicast service data exists; the MBSFN subframes are mainly used for transmitting Multimedia Broadcast Multicast Service (MBMS), wherein a small number of MBSFN subframes are also used for transmitting other services, such as positioning services; the MBSFN subframe structure is as follows: in LTE R8/9, MBSFN is specified to have 12 Orthogonal Frequency Division Multiplexing (OFDM) symbols in total, where one or two OFDM symbols before a subframe are used to carry a Physical Downlink Control Channel (PDCCH) and some other Physical channels, and the remaining OFDM symbols in the subframe are used to transmit MBMS, where CRS is transmitted in one or two OFDM symbols before an MBSFN subframe, and when a Physical Multicast Channel (PMCH) of the MBSFN subframe is scheduled to transmit MBMS, a reference signal is transmitted in the PMCH of the MBSFN subframe.
By analyzing the prior art of LTE, it can be known that a Cell-specific reference signal (CRS) is transmitted in each downlink subframe transmitted by a non-Multimedia Broadcast multicast service Single Frequency Network (MB SFN), that is, even if no unicast service data is transmitted in a certain downlink subframe transmitted by a non-MBSFN, the CRS still needs to be transmitted because the CRS also has a function of providing measurement for a UE.
If the CRS is not transmitted in the downlink subframe of the non-MBSFN transmission, and the network side does not notify the UE, and the CRS is not transmitted in the downlink subframe, the UE may consider that it fails to receive the information because the CRS is not received in the downlink subframe, thereby causing the UE to fail to measure. When the channel quality of the UE is degraded, the UE may think that the UE is currently located at the edge of the cell, so that the channel quality measurement of the neighboring cell needs to be performed, and mainly measures the channel quality of the neighboring cell to determine whether channel switching is needed or not.
The invention provides a subframe configuration method, fig. 1 is a flow diagram of the subframe configuration method implemented by the invention, as shown in fig. 1, the method comprises the following steps:
step 101, a base station schedules data in one or more unicast subframes to send to UE in a centralized manner;
specifically, the base station schedules the data of the user equipment in one or more unicast subframes to be sent to the UE in a centralized manner according to a scheduling principle; when the user equipment is less and the data volume of the user equipment is less, one or more subframes can realize the data transmission of the user equipment, the rest unicast subframes can be kept idle for a long time, and the base station promotes the probability of idle unicast subframes in a cell by a scheduling principle; the data of the user equipment is mainly unicast service data of the user equipment;
step 102, judging whether idle unicast subframes appear, if so, executing step 103, otherwise, executing step 101;
specifically, the base station determines whether an idle unicast subframe occurs according to the data volume of the unicast service, and the method includes: because the base station schedules and transmits the data in one or more unicast subframes in a centralized manner, if the data volume of the user equipment in one or more unicast subframes is kept unchanged for a period of time, the rest unicast subframes can be regarded as idle unicast subframes; in addition, the base station can adopt the scheme in a specific time period with few users, such as 0:00 to 6:00 every day, and because the number of users talking in the cell in the time period is less, the probability of idle unicast subframes is higher; if an idle unicast subframe appears, executing step 103, and if no unicast subframe appears, executing step 101;
103, the base station converts the idle unicast sub-frame into an MBSFN sub-frame;
specifically, the base station configures the idle unicast subframe into the MBSFN subframe through the parameter MBSFN-subframe configuration on the System Information Block 2(SIB2, System Information Block 2);
in LTE, in Frequency Division Duplex (FDD) mode, a downlink subframe with subframe numbers #1, #2, #3, #6, #7, #8, which can be reconfigured as an MBSFN subframe, is a unicast subframe, and in Time Division Duplex (TDD) mode, a downlink subframe with subframe numbers #0, #4, #5, #9, which can be reconfigured as an MBSFN subframe, is a unicast subframe;
104, the base station sends a configuration signaling of the MBSFN subframe to the UE;
specifically, after the base station converts the idle unicast subframe into the MBSFN subframe, the base station sends the configuration signaling of the configured MBSFN subframe to the UE through SIB2 or SIB 13; the content of the configuration signaling is which unicast subframes are reconfigured into MBSFN subframes, and the base station informs the UE of the unicast subframes reconfigured into the MBSFN subframes through the configuration signaling; in practical application, when the base station sends the configuration signaling of the MBSFN subframe to be configured to the UE, the base station also sends the originally configured MBSFN subframe of the cell itself.
In practical application, for the MBSFN subframe that is reconfigured, the base station may keep the Cyclic Prefix (CP) of the subframe unchanged, and only refer the subframes as MBSFN subframes, so that the UE of R8 or R9 may know that the subframe is an MBSFN subframe, and thus, the CRS may not be sent in the MBSFN subframe that is reconfigured, and unicast service is not transmitted;
105, the base station does not send the special reference signal of the cell in the MBSFN subframe transferred by the base station, or sends the special reference signal of the cell on the previous one or two OFDM symbols, and keeps the rest OFDM symbols empty;
specifically, the base station keeps all the OFDM of the MBSFN subframe to be configured to be empty, where the OFDM symbol to be kept to be empty means that the base station does not send any data information in the OFDM symbol, the CRS is not sent in the first one or two OFDM symbols of the MBSFN subframe to be configured to be empty, and the OFDM symbol does not carry a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid ARQ Indicator Channel (PHICH), a Physical Downlink Control Channel (PDCCH), so that continuous empty OFDM symbols may appear in the MBSFN subframe to be configured to be empty, and the base station turns off the radio frequency when the OFDM symbol is empty, which may save power and energy; at this time, in the FDD mode, the UE preferentially uses the CRSs in the downlink subframes #0, #4, #5, and #9 in the unicast subframe for measurement, because the downlink subframes #0, #4, #5, and #9 are not reconfigured to be MBSFN subframes in this embodiment, and the UE may also use the CRSs in the unicast subframes that are not reconfigured to be MBSFN subframes in the downlink subframes #1, #2, #3, #6, #7, and #8 in the unicast subframe for measurement;
because the MBSFN sub-frame which is subjected to configuration does not send any information, for a cell, when the number of user equipment in the cell and the data volume of the user equipment are less, the base station realizes normal transmission of unicast service through a configuration pattern; the specific method comprises the following steps: when the number of the cell user equipment and the data amount of the user equipment are small, the base station can schedule the UE to transmit in an appointed uplink subframe, and the appointed uplink subframe is configured by the base station specifically; the rule that the base station sends the feedback information according to the uplink data of the UE is realized by the base station configuring the pattern of the MBSFN subframe, the base station can always send the feedback information to the UE on one downlink unicast subframe, namely: the base station configures a pattern which meets the requirements of uplink and downlink data transmission and multiple uplink retransmissions, and downlink subframes used in the pattern are not configured into MBSFN subframes;
or the base station sends CRS on the first one or two OFDM symbols of the MBSFN subframe to be configured, carries PHICH, PCFICH and PDCCH, does not send CRS on the rest OFDM symbols, simultaneously does not send MBSFN reference signals and MBMS data, and keeps the rest OFDM symbols empty; therefore, the base station can close the radio frequency on the remaining continuous empty OFDM symbols, thereby achieving the purposes of saving electricity and energy; the MBSFN reference signal is a CRS (cell-specific reference signal) which is configured and sent when the MBMS is transmitted in a PMCH (physical multicast channel) specified by a protocol;
the method may further comprise the steps of:
106, the base station does not send the MBSFN subframe information to the MCE;
in the prior art, an MBSFN subframe carrying an MBMS service is configured by a Multi-cell/Multicast Coordination Entity (MCE), and sends configuration information to a relevant base station. If the base station sends the MBSFN subframe which is transferred to the MCE, the MCE can know which unicast subframes are transferred to the MBSFN subframe by the base station, when the MCE finds that the idle unicast subframes of all the base stations in a certain range are the same and the requirement of the MBMS service which needs to be sent exists, the MCE can send the MBMS by using the MBSFN subframe which is transferred to the configuration, at the moment, if the base station wants to transfer the MBSFN subframe which is transferred to the configuration and used by the MCE to the unicast subframe again, the base station needs to interact with the MCE to inform the MCE to release the MBMS service on the MBSFN subframe which is transferred to the configuration, and the base station transfers the MBSFN subframe which is transferred to the unicast subframe to send the unicast service according to the requirement, but the interaction between the base station and the MCE is slow, the MBSFN subframe which is transferred to;
the base station does not send the information of the MBSFN subframe switched to the configuration to the MCE, so that the base station has the domination right of the MBSFN subframe switched to the configuration, the base station has the right to reconfigure the MBSFN subframe to the unicast subframe at any time by utilizing the domination right, and unicast service data are transmitted by utilizing the configured unicast subframe, so that the time for the base station to mutually convert the unicast subframe and the MBSFN subframe switched to the configuration can be shortened, the time of the reconfiguration process is reduced, and the realization efficiency is improved; meanwhile, the base station can conveniently convert the configured MBSFN subframe and the unicast subframe according to the needs to send different service data, or send other services by using the configured MBSFN subframe, for example, the base station can send the MBMS service in the single-cell mode in the configured MBSFN subframe.
In order to achieve energy saving of a base station as much as possible, the present invention provides a scheduling method in which the base station needs to schedule data of user equipment in a cell to transmit the data to a UE in one or more unicast subframes. When the data volume of the user equipment is smaller, the user equipment is centralized to be scheduled in a unicast subframe, if the data volume of the user equipment is larger, the user equipment is firstly scheduled in the unicast subframe, and if the unicast subframe is not enough to be used, the user equipment is scheduled in a second unicast subframe.
Fig. 2 is a method for implementing an embodiment in which the base station in fig. 1 schedules data to send to the UE in one or more unicast subframes, and as shown in fig. 2, the method includes the following steps:
step 201, the base station centralizes data in downlink subframes #0 and #5 for scheduling;
specifically, in this embodiment, the base station preferentially concentrates the data of the user equipment in the downlink subframes #0, #4, #5, and #9 of the unicast subframe for scheduling, because in the present invention, the downlink subframes #0, #4, #5, and #9 are not configured as MBSFN subframes in the FDD mode; generally, downlink subframes #0 and #5 are used first, that is: the base station centralizes the data of the user equipment in downlink subframes #0 and #5 for scheduling;
step 202, when the resources of the downlink subframes #0 and #5 are not enough to transmit the unicast service in the cell, using the downlink subframes #4 and # 9;
specifically, when the resources of #0 and #5 subframes are not enough to be used, the downlink subframe #9 may be used first, and when the resources of #0, #5 and #9 are not enough to be used, the downlink subframe #4 is used;
step 203, when the resources of #0, #4, #5 and #9 are enough to transmit the unicast service in the cell, that is, the resources are enough, other subframes are idle; when the resources of #0, #4, #5 and #9 are not enough to transmit the unicast service in the cell, namely the resources are not enough, increasing the sub-frames;
specifically, when the number of the user equipments in the cell and the data amount of the user equipments are small, for one cell, when the downlink subframes #0, #4, #5, and #9 are sufficient for the transmission of the unicast service in the cell, other unicast subframes in the cell will be idle;
when the resources of the downlink subframes #0, #4, #5 and #9 are not enough to transmit the unicast service in the cell, the subframes in the downlink subframes #1, #2, #3, #6, #7 and #8 of the unicast subframe are increased, and the unicast subframes are continued as far as possible when the base station schedules.
The method is similar to the above method for TDD mode for FDD mode as in LTE, except that the downlink subframe numbers #0, #4, #5 and #9 are changed to #0, #1, #5 and # 6.
By utilizing the scheduling principle, when the number of user equipment in a cell and the data volume of the user equipment are less, an idle unicast subframe exists in the cell, a base station converts the idle unicast subframe into an MBSFN subframe and sends a configuration signaling of the MBSFN converted to be configured to UE; the base station does not send the special reference signal of the cell in the MBSFN subframe transferred by the base station, or sends the special reference signal of the cell on the previous OFDM symbol or the previous two OFDM symbols, and keeps the rest OFDM symbols empty, so that the base station closes the radio frequency when the OFDM symbols are empty to realize power saving and energy saving.
When an UE in the early LTE period (e.g., a UE in R8) encounters an MBSFN subframe, only information on the first one or two OFDM symbols of the MBSFN subframe can be received, so that no influence is caused on the UE in R8, for example, transmission and reception, measurement, and the like of unicast traffic of the UE in R8; when the UE of R9 encounters an MBSFN subframe, if the UE is the UE of R9 with only unicast traffic, only information on the first one or two OFDM symbols of the MBSFN subframe can be received; if the UE is receiving the MBMS, or the UE with the MBMS capability, it can know whether the information in the MBSFN subframe needs to be received through Multicast Control Channel (MCCH) information and scheduling information (MSI) of Multicast Channel (MCH), so that there is no influence on the UE of R9, for example, the UE of R9 receives and transmits unicast service, the UE of R9 receives Multicast service, and the measurement of the UE of R9.
Since there is no influence on the UEs of R8/R9, the scheme of the present invention has good compatibility, and by the present embodiment, after the idle unicast subframe is configured as the MBSFN subframe, the subframe converted into the MBSFN subframe does not continue to transmit the CRS, or only transmits the CRS in the previous one or two OFDM symbols, thereby achieving the purpose of saving power and energy of the base station.
The invention only aims at the situation that the idle unicast sub-frame is converted into the MBSFN sub-frame, and the originally configured MBSFN sub-frame in the cell is still processed according to the regulation of the existing LTE protocol.
In order to implement the above method, the present invention further provides a subframe configuration system, as shown in fig. 3, the system includes a base station 31, a user equipment 32: wherein,
the base station 31 is configured to forward the unicast subframe to the MBSFN subframe, and send a configuration signaling of the forwarded MBSFN subframe to the user equipment 32;
the user equipment 32 is configured to receive a configuration signaling of the MBSFN subframe to be configured, which is sent by the base station 31;
the base station 31 is further configured to schedule the data set in one or more unicast subframes according to a scheduling principle and send the data set to the user equipment 32; judging whether idle unicast subframes appear according to the data volume of the unicast service, and considering the rest unicast subframes as idle unicast subframes when the data volume of the user equipment in one or more unicast subframes is kept unchanged for a period of time; not sending CRS in the MBSFN subframe subjected to configuration transfer, and keeping all OFDM symbols empty; or transmitting the CRS on the first one or two OFDM symbols and keeping the rest OFDM symbols empty.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (12)
1. A method for configuring a subframe, the method comprising:
the method comprises the steps that a base station converts and configures a unicast subframe into a multimedia broadcast multicast service single frequency network (MBSFN) subframe, a configuration signaling of the configured MBSFN subframe is sent to User Equipment (UE), and then the base station processes the configured MBSFN subframe.
2. The method of claim 1, wherein the unicast subframe is a base station determined idle unicast subframe.
3. The method of claim 1 or 2, wherein before the base station reconfigures the unicast subframe as the MBSFN subframe, the method further comprises:
and the base station schedules the data of the UE in one or more unicast subframes to send to the UE.
4. The method of claim 3, wherein the step of the base station scheduling the UE data in one or more unicast subframes for sending to the UE specifically comprises:
in a frequency division duplex mode, a base station centralizes data in downlink subframes #0 and #5 of a unicast subframe for scheduling;
when the resources of the downlink subframes #0 and #5 are not enough to transmit unicast service in a cell, using downlink subframes #4 and # 9;
when the resources of #0, #4, #5 and #9 are enough to transmit the unicast service in the cell, other subframes are idle;
when the resources of #0, #4, #5 and #9 are not enough to transmit unicast traffic in the cell, the subframes are increased.
5. The method according to claim 1 or 2, characterized in that the method further comprises:
and the base station judges whether idle unicast subframes appear according to the data volume of the unicast service, and determines that the rest unicast subframes are idle unicast subframes when the data volume of the user in one or more unicast subframes is kept unchanged for a period of time.
6. The method according to claim 1, wherein the sending the configuration signaling of the MBSFN subframe that is reconfigured to the UE specifically comprises:
the base station transmits configuration signaling of the reconfigured MBSFN subframe to the UE through the system information block 2(SIB2) or SIB 13.
7. The method according to claim 1, wherein the processing is specifically:
the base station does not transmit a cell-specific reference signal (CRS) in the MBSFN subframe transferred with the configuration; or transmitting the CRS on a previous one or two Orthogonal Frequency Division Multiplexing (OFDM) symbols and keeping the remaining OFDM symbols empty.
8. The method of claim 7, wherein the step of the base station not transmitting the CRS in the reconfigured MBSFN subframe specifically comprises:
the base station keeps all OFDM of the MBSFN subframe to be configured to be empty, CRS is not sent in the first OFDM symbol or the first two OFDM symbols of the MBSFN subframe to be configured, a physical hybrid ARQ indicator channel (PHICH), a Physical Control Format Indicator Channel (PCFICH) and a Physical Downlink Control Channel (PDCCH) are not carried, and the base station closes the radio frequency.
9. The method of claim 7, wherein the transmitting the CRS on the first one or two OFDM symbols and keeping remaining OFDM symbols empty is:
and the base station transmits CRS on the first one or two OFDM symbols of the MBSFN subframe to be configured, carries PHICH, PCFICH and PDCCH, does not transmit CRS on the rest OFDM symbols, does not transmit MBSFN reference signals and multimedia broadcast multicast service data, keeps the rest OFDM symbols empty, and closes the radio frequency on the rest empty OFDM symbols.
10. The method of claim 1, further comprising:
and the base station does not send the configuration signaling of the MBSFN subframe to the multi-cell coordination entity.
11. A subframe configuration system, comprising: a base station, a user equipment; wherein,
the base station is used for converting the unicast subframe into the MBSFN subframe, transmitting the configuration signaling of the converted MBSFN subframe to the user equipment, and then processing the converted MBSFN subframe;
and the user equipment is used for receiving the configuration signaling of the MBSFN subframe transferred with the configuration sent by the base station.
12. The system of claim 11, wherein the base station is further configured to transmit the UE data set to the UE in one or more unicast subframes; judging whether idle unicast subframes appear according to the data volume of the unicast service, and determining the rest unicast subframes to be idle unicast subframes when the data volume of users in one or more unicast subframes is kept unchanged for a period of time; not transmitting CRS in the MBSFN subframe subjected to configuration transfer; or transmitting the CRS on the first one or two OFDM symbols and keeping the rest OFDM symbols 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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| CN102223604B (en) | 2013-11-06 |
| WO2011127792A1 (en) | 2011-10-20 |
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