CN107295640B - Method and device for transmitting downlink signal and/or downlink channel - Google Patents

Method and device for transmitting downlink signal and/or downlink channel Download PDF

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CN107295640B
CN107295640B CN201610204535.XA CN201610204535A CN107295640B CN 107295640 B CN107295640 B CN 107295640B CN 201610204535 A CN201610204535 A CN 201610204535A CN 107295640 B CN107295640 B CN 107295640B
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mbsfn
subframe
unicast
sequence
pss
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CN107295640A (en
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徐汉青
赵亚军
莫林梅
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ZTE Corp
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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Abstract

A method and apparatus for transmitting and receiving downlink signals and/or downlink channels, comprising: the base station transmits downlink signals or downlink channels to the User Equipment (UE) in a pre-configured unicast subframe and/or a unicast part in a multicast or multicast single frequency network (MBSFN) subframe and/or an MBSFN subframe containing the unicast part and/or an MBSFN subframe containing newly defined downlink signals; wherein the pre-configured unicast subframe, and/or the MBSFN subframe containing the unicast portion, and/or the MBSFN subframe containing the newly defined downlink signal comprise any one or more subframes.

Description

Method and device for transmitting downlink signal and/or downlink channel
Technical Field
This document relates to, but is not limited to, multicast or Multicast single frequency network (MBSFN) technology, and more particularly to a method and apparatus for transmitting downlink signals and/or downlink channels.
Background
MBSFN requires that a User Equipment (UE) simultaneously receive identical waveforms transmitted from multiple cells, and the UE can treat the multiple MBSFN cells as one large cell. In this way, the UE will not only not suffer from inter-cell interference of neighboring cell transmissions, but will also benefit from superposition of signals from multiple MBSFN cells. And, the time difference problem of multipath propagation can be solved by setting a longer Cyclic Prefix (CP), thereby eliminating the interference in the cell.
MBSFN includes both a Dedicated Carrier (DC) MBSFN mode and a Unicast (Unicast) mixed Carrier MBSFN mode. Long term evolution (LTE, long Term Evolved) currently mainly implements MBSFN mode with unicast mixed carriers. In the MBSFN mode with unicast mixed carrier, the 1 st orthogonal frequency division multiplexing (OFDM, orthogonal Frequency Division Multiplexing) symbol and the 2 nd OFDM symbol in the MBSFN subframe with unicast mixed carrier adopt normal CP, and the 1-2 OFDM symbols are unicast parts, and the unicast parts can be used for transmission of channels and signals such as Physical downlink control channel (PDCCH, physical Downlink Control Channel), physical control format indicator channel (PCFICH, physical Control Format Indicator Channel) and Physical Hybrid automatic repeat request (ARQ, automatic Repeat Request) Indicator Channel. Other symbols in the MBSFN subframe mixed with the unicast carrier are used for transmission of the MBSFN signal. The dedicated carrier MBSFN mode is suitable for exclusive carrier deployment and does not need to be multiplexed with unicast signals in the same subframe. The existing LTE DC MBSFN mode employs a subcarrier spacing of 7.5 kilohertz (kHz), with each OFDM symbol in each DC MBSFN subframe being twice as long as the 15kHz subcarrier spacing system. The LTE specifications do not fully implement a subcarrier spacing of 7.5kHz (i.e. no signaling is defined to indicate the use of this mode and therefore cannot be implemented), at least to Rel-10 release, LTE only fully supports a subcarrier spacing of 15kHz, i.e. the MBSFN mode with unicast mixed carriers as described above.
In the related LTE protocol, for frequency division duplexing (FDD, frequency Division Duplexing), only subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, subframe 8 in each radio frame may be configured as MBSFN subframes; for time division duplexing (TDD, time Division Duplexing), only subframe 3, subframe 4, subframe 7, subframe 8, subframe 9 in each radio frame may be configured as MBSFN subframes. However, in some scenarios more subframes need to be configured as MBSFN subframes. E.g., using a supplemental downlink (SDL, supplementary Downlink) carrier to carry enhanced multimedia broadcast or multicast services (eMBMS, enhanced Multimedia Broadcast/Multicast Service). To avoid wasting Uplink capacity in FDD Uplink (UL) and Downlink (DL) carrier pairs, all eMBMS should be sent as centrally as possible on some SDL carriers. In addition, the MBSFN subframe may have no unicast part and no Cell-Specific pilot Signal (CRS), and the entire MBSFN subframe may be used to transmit multimedia broadcast or multicast service (MBMS, multimedia Broadcast/Multicast Service).
For FDD, subframe 0, subframe 4, subframe 5, and subframe 9 are used to transmit a synchronization signal, or a measurement signal, or a downlink signal or a downlink channel such as unicast service; for TDD, subframes 0, 1, 5, and 6 are used to transmit a downlink signal or channel such as a synchronization signal, a measurement signal, or a unicast service. If subframe 0, subframe 4, subframe 5, subframe 9; or subframe 0, subframe 1, subframe 5 and subframe 6 can be configured as MBSFN subframes, or there is no unicast part in all MBSFN subframes in the radio frame, there is a problem of how to send downlink signals or channels such as synchronous signals, measurement signals, etc., which affects both the reception of UE MBMS service (i.e. MBSFN service) and the cell switching of UE. In the related art, a solution for transmitting downlink signals and/or downlink channels such as a synchronization signal, a measurement signal, a unicast service, etc. in the case that all subframes in a part of radio frames are configured as MBSFN subframes, or in the case that no unicast part is present in all MBSFN subframes in a part of radio frames is not given.
Disclosure of Invention
The embodiment of the invention provides a method and a device for transmitting downlink signals and/or downlink channels, which can transmit the downlink signals and/or the downlink channels under the condition that all subframes in a part of radio frames are configured as MBSFN subframes or unicast parts are not available in all MBSFN subframes in the part of radio frames.
The embodiment of the invention provides a method for transmitting downlink signals and/or downlink channels, which comprises the following steps:
the base station transmits downlink signals or downlink channels to the User Equipment (UE) in a pre-configured unicast subframe and/or a unicast part in a multicast or multicast single frequency network (MBSFN) subframe and/or an MBSFN subframe containing the unicast part and/or an MBSFN subframe containing newly defined downlink signals;
wherein the pre-configured unicast subframe, and/or the MBSFN subframe containing the unicast portion, and/or the MBSFN subframe containing the newly defined downlink signal comprise any one or more subframes.
Optionally, the method further comprises the following steps:
the base station sends the configuration information of the unicast subframe, and/or the configuration information of the unicast part in the MBSFN subframe, and/or the configuration information of the MBSFN subframe containing the unicast part, and/or the configuration information of the MBSFN subframe containing the newly defined downlink signal to the UE.
Optionally, the base station sends the configuration information to the UE through radio resource control protocol RRC signaling or downlink control signaling DCI.
Optionally, the configuration information includes sending configuration information and/or measurement configuration information.
Alternatively to this, the method may comprise,
the sending configuration information is the same as the measuring configuration information;
alternatively, the measurement configuration information is a subset of the transmission configuration information.
Optionally, the sending configuration information includes any one or more of:
the base station transmits the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or a transmission period of the MBSFN subframe including the newly defined downlink signal, a transmission offset of the base station transmitting the unicast subframe, and/or the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a transmission duration of the base station transmitting the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or a transmission duration of the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a duration or symbol number of the unicast portion in the MBSFN subframe.
Optionally, the transmission period of the unicast subframe transmitted by the base station is the same as the transmission period of the DRS subframe transmitted by the base station, the transmission offset of the unicast subframe transmitted by the base station is the same as the transmission offset of the DRS subframe transmitted by the base station, and the transmission duration of the unicast subframe transmitted by the base station is the same as the transmission duration of the DRS subframe transmitted by the base station.
Optionally, the base station transmits the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the transmission period of the MBSFN subframe including the unicast portion is greater than 5 ms.
Optionally, the measurement configuration information includes any one or more of:
the UE measures a period of measurement of the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a measurement offset of the UE to the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the newly defined downlink signal, a measurement duration of the UE to the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a duration or a number of symbols of the unicast portion in the MBSFN subframe.
Optionally, the measurement period of the UE on the unicast subframe is the same as the measurement period of the UE on the DRS measurement timing configuration DMTC subframe, the measurement offset of the UE on the unicast subframe is the same as the measurement offset of the UE on the DMTC subframe, and the measurement duration of the UE on the unicast subframe is the same as the measurement duration of the UE on the DMTC subframe.
Optionally, the method further comprises the following steps:
the base station configures a subframe for transmitting a DRS or a DMTC as the unicast subframe.
Optionally, the subframes configured as the unicast subframes are not configured as other types of subframes; wherein the other types of subframes comprise dedicated carrier MBSFN subframes and/or MBSFN subframes of mixed carrier with unicast;
and/or, the MBSFN subframe including the unicast portion is not configured as a dedicated carrier MBSFN subframe.
Optionally, the base station transmits any one or more of the following downlink signals or downlink channels in the unicast subframe or the unicast portion:
signals for achieving synchronization, signals for achieving measurement, signals for achieving demodulation, downlink channels, newly defined downlink signals.
Optionally, the signal for implementing synchronization includes any one or more of the following:
Discovery signal DRS, cell-specific pilot CRS, primary synchronization signal PSS, and secondary synchronization signal SSS.
Optionally, the signal for implementing the measurement includes any one or more of:
discovery signal DRS, cell-specific pilot CRS, channel state information measurement pilot CSI-RS.
Optionally, the signal for implementing demodulation includes: the downlink UE is dedicated to the pilot UE-specific RS.
Optionally, the downlink channel includes any one or more of:
physical downlink control channel PDCCH, physical control format indicator channel PCFICH, physical hybrid automatic repeat indicator channel PHICH, enhanced physical downlink control channel EPDCCH.
Optionally, the MBSFN subframe including the newly defined downlink signal is a dedicated carrier MBSFN subframe or a MBSFN subframe of a mixed carrier with unicast.
Optionally, the newly defined downlink signal includes an MBSFN synchronization signal and/or an MBSFN-DRS.
Optionally, the MBSFN subframe including the newly defined downlink signal includes: subframe 0, and/or subframe 5, and/or subframe 1, and/or subframe 6.
Alternatively to this, the method may comprise,
the MBSFN synchronous signal is sent on the last OFDM symbol of the first time slot of the subframe 0 and/or the subframe 5, and/or the MBSFN synchronous signal is sent on the last-to-last OFDM symbol of the first time slot of the subframe 0 and/or the subframe 5;
Alternatively, the MBSFN synchronization signal is transmitted on the third OFDM symbol of subframe 1 and/or subframe 6, and/or the MBSFN synchronization signal is transmitted on the last OFDM symbol of subframe 1 and/or subframe 5.
Optionally, the MBSFN synchronization signal and/or MBSFN-DRS are generated according to MBSFN area identification.
Optionally, the MBSFN-DRS includes the MBSFN synchronization signal and an MBSFN reference signal RS.
Optionally, the MBSFN synchronization signal includes an MBSFN primary synchronization signal PSS sequence and an MBSFN secondary synchronization signal SSS sequence, and generating the MBSFN synchronization signal according to the MBSFN area identifier includes:
determining parameters for generating MBSFN PSS sequences and parameters for generating MBSFN SSS sequences according to the MBSFN area identification;
determining a root factor according to the determined parameters for generating the MBSFN PSS sequence, and generating an initial MBSFN PSS sequence according to the determined root factor; generating an initial SSS sequence according to the determined parameters for generating the MBSFN SSS sequence;
supplementing 5 0 s before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and supplementing 5 0 s before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence;
or, respectively supplementing 5m 0 s before and after the sequence obtained by interpolating the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and supplementing 5m 0 s before and after the sequence obtained by interpolating the initial MBSFN SSS sequence to obtain the SSS sequence;
Or, interpolating sequences obtained by supplementing 5 0 before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and interpolating sequences obtained by supplementing 5 0 before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence;
where m is the ratio between the number of subcarriers contained in one RB and 12.
Optionally, the determining the parameters for generating the MBSFN PSS sequence and the parameters for generating the MBSFN SSS sequence according to the MBSFN area identification includes:
according to the formula
Figure BDA0000957110300000061
Determining the parameters for generating MBSFN SSS sequences and the parameters for generating MBSFN PSS sequences;
wherein ,
Figure BDA0000957110300000062
for the MBSFN area identification, n is +.>
Figure BDA0000957110300000063
The number of values of->
Figure BDA0000957110300000064
For the parameters for generating MBSFN SSS sequences, < + >>
Figure BDA0000957110300000071
Is a parameter for generating MBSFN PSS sequences.
Alternatively to this, the method may comprise,
the said
Figure BDA0000957110300000072
The value of (2) is 0-167, said +.>
Figure BDA0000957110300000073
The value range of (2) is 0-2;
alternatively, the described
Figure BDA0000957110300000074
The value of (2) is 0-127, said +.>
Figure BDA0000957110300000075
The value range of (2) is 0-1;
alternatively, the described
Figure BDA0000957110300000076
The value of (2) is in the range of 0-63, said +.>
Figure BDA0000957110300000077
The range of the value of (2) is 0-3.
Optionally, the determining the root factor according to the determined parameter for generating the MBSFN PSS sequence includes:
Searching a root factor corresponding to the determined parameter for generating the MBSFN PSS sequence in the corresponding relation between the parameter for generating the MBSFN PSS sequence and the root factor;
wherein the root factor in the correspondence is any two of 25, 29 and 34.
Optionally, the MBSFN synchronization signal includes an MBSFN synchronization signal sequence;
the generating the MBSFN synchronization signal according to the MBSFN area identification comprises:
determining parameters for generating MBSFN synchronous signal sequences as the MBSFN area identification;
generating an initial MBSFN synchronous signal sequence according to the determined parameters for generating the MBSFN synchronous signal sequence;
respectively supplementing 5 0 s before and after the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
or, respectively supplementing 5m 0 s before and after the sequence obtained by interpolating the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
or, interpolating sequences obtained by supplementing 5 0 before and after the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
where m is the ratio between the number of subcarriers contained in one RB and 12.
Optionally, the interpolating the initial MBSFN PSS/SSS/synchronization signal sequence includes:
Inserting (m-1) 0 s or (m-1) the same value as each element in the initial MBSFN PSS/SSS/synchronization signal sequence before or after the element;
alternatively, 12 (m-1) values are inserted before or after every 12 elements in the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12 (m-1) values are each 0, or each of the inserted 12 (m-1) values is the same as one of the 12 elements;
alternatively, (m-1) k values are inserted before or after the initial MBSFN PSS/SSS/synchronization signal sequence; wherein k is the total number of elements of the initial MBSFN PSS/SSS sequence, the inserted (m-1) k values are all 0, or each of the inserted (m-1) k values is the same as one element of the initial MBSFN PSS/SSS/synchronization signal sequence.
Optionally, the interpolating the sequences obtained by supplementing 5 0's before and after the initial MBSFN PSS/SSS/synchronization signal sequence respectively includes:
inserting (m-1) 0 s or (m-1) the same value as each element in the sequence obtained by supplementing 5 0 s before and after the initial MBSFN PSS/SSS/synchronization signal sequence respectively;
alternatively, 12 (m-1) values are inserted before or after each 12 elements in the sequence obtained by supplementing 5 0 before and after the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12 (m-1) values are each 0, or each of the inserted 12 (m-1) values is the same as one of the 12 elements;
Alternatively, (m-1) k values are inserted before or after the sequence obtained by supplementing 5 0 s before and after the initial MBSFN PSS/SSS/synchronization signal sequence respectively; wherein k is the total number of elements of the initial MBSFN PSS/SSS sequence, the inserted (m-1) k values are all 0, or each of the inserted (m-1) k values is the same as one element of the initial MBSFN PSS/SSS/synchronization signal sequence.
The embodiment of the invention also provides a device for sending the downlink signal and/or the downlink channel, which comprises:
a first sending module, configured to send a downlink signal or a downlink channel to a user equipment UE in a pre-configured unicast subframe, and/or a unicast portion in a multicast or multicast single frequency network MBSFN subframe, and/or an MBSFN subframe that includes a unicast portion, and/or an MBSFN subframe that includes a newly defined downlink signal;
wherein the pre-configured unicast subframe, and/or the MBSFN subframe containing the unicast portion, and/or the MBSFN subframe containing the newly defined downlink signal comprise any one or more subframes.
Optionally, the method further comprises:
and the second sending module is used for sending the configuration information of the unicast subframe, the configuration information of the unicast part in the MBSFN subframe, the configuration information of the MBSFN subframe containing the unicast part and/or the configuration information of the MBSFN subframe containing the newly defined downlink signal to the UE.
Optionally, the second sending module is specifically configured to:
and sending the configuration information to the UE through a radio resource control protocol (RRC) signaling or downlink control signaling (DCI).
Compared with the related art, the technical scheme of the embodiment of the invention comprises the following steps: the base station transmits downlink signals or downlink channels to the User Equipment (UE) in a pre-configured unicast subframe and/or a unicast part in a multicast or multicast single frequency network (MBSFN) subframe and/or an MBSFN subframe containing the unicast part and/or an MBSFN subframe containing newly defined downlink signals; wherein the pre-configured unicast subframe, and/or the MBSFN subframe containing the unicast portion, and/or the MBSFN subframe containing the newly defined downlink signal comprise any one or more subframes. By the scheme of the embodiment of the invention, any one or more subframes are configured into unicast subframes and/or MBSFN subframes containing unicast parts and/or MBSFN subframes containing newly defined downlink signals and are used for transmitting the downlink signals and/or downlink channels, and subframe 0, subframe 4, subframe 5 and subframe 9 are not required to be specially configured; or subframe 0, subframe 1, subframe 5 and subframe 6 are used for transmitting downlink signals and/or downlink channels, so that the downlink signals and/or downlink channels are transmitted under the condition that all subframes in part of the radio frames are configured as MBSFN subframes or no unicast part exists in all MBSFN subframes in part of the radio frames.
Drawings
The drawings in the embodiments of the invention are for further understanding of the invention and together with the description serve to explain the invention and do not limit the scope of the invention.
Fig. 1 is a flowchart of a method for transmitting a downlink signal and/or a downlink channel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of sending a unicast subframe according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an embodiment of transmitting MBSFN subframes including unicast portions;
fig. 4 is a schematic structural diagram of an apparatus for transmitting a downlink signal and/or a downlink channel according to an embodiment of the present invention.
Detailed Description
The invention is further described below in conjunction with the drawings to facilitate understanding of those skilled in the art, and is not intended to limit the scope of the invention. It should be noted that, in the case of no conflict, the embodiments and various modes in the embodiments in the present application may be combined with each other.
Referring to fig. 1, an embodiment of the present invention proposes a method for transmitting a downlink signal and/or a downlink channel, including:
step 100, the base station transmits a downlink signal and/or a downlink channel to the UE in a pre-configured unicast subframe and/or a unicast portion in the MBSFN subframe and/or an MBSFN subframe including the unicast portion and/or an MBSFN subframe including a newly defined downlink signal.
In this step, the pre-configured unicast subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal include any one or more subframes.
In this step, the base station transmits any one or more of the following downlink signals and/or downlink channels in a unicast subframe or unicast portion:
signals for achieving synchronization, signals for achieving measurement, signals for achieving demodulation, downlink channels, newly defined downlink signals.
Wherein the signals for achieving synchronization include any one or more of:
discovery signal (DRS, discovery Reference Signal), CRS, primary synchronization signal (PSS, primary Synchronization Signal) and secondary synchronization signal (SSS, secondary Synchronization Signal).
The signals used to effect the measurements include any one or more of the following:
DRS, CRS, channel state information measurement pilot (CSI-RS, channel State Information RS).
The signal for implementing demodulation includes: downlink UE-specific pilot (UE-specific RS).
Wherein, DRS comprises CRS, PSS and SSS, CSI-RS.
CRS may be used for synchronization and measurement, PSS and SSS may be used for synchronization, CSI-RS may be used for measurement, and UE-specific RS may be used for demodulation.
Optionally, the downlink channel includes one or more of:
physical downlink control channel (PDCCH, physical Downlink Control Channel), physical control format indicator channel (PCFICH, physical Control Format Indicator Channel), physical hybrid automatic repeat indicator channel (PHICH, physical Hybrid ARQ Indicator Channel), enhanced physical downlink control channel (EPDCCH, enhanced Downlink Control Channel).
Wherein the newly defined downlink signal comprises MBSFN synchronous signal and/or MBSFN-DRS.
Optionally, the MBSFN subframes that include the newly defined downlink signal include subframe 0, and/or subframe 5, and/or subframe 1, and/or subframe 6.
Optionally, the MBSFN synchronization signal is transmitted on the last OFDM symbol of the first slot of subframe 0 and/or subframe 5, and/or the MBSFN synchronization signal is transmitted on the last-to-last OFDM symbol of the first slot of subframe 0 and/or subframe 5;
alternatively, the MBSFN synchronization signal is transmitted on the third OFDM symbol of subframe 1 and/or subframe 6, and/or the MBSFN synchronization signal is transmitted on the last OFDM symbol of subframe 1 and/or subframe 5.
For example, for a subcarrier spacing of 15kHz, an MBSFN PSS/SSS/synchronization signal sequence of length 72 is mapped onto the middle 72 subcarriers of the system bandwidth (excluding Direct Current (DC) subcarriers);
Mapping the MBSFN PSS/SSS/synchronization signal sequence with the length of 144 to the middle 144 subcarriers (excluding DC subcarriers) of the system bandwidth for the case of the subcarrier interval of 7.5 kHz; alternatively, the MBSFN PSS/SSS/synchronization signal sequence with the length of 72 is mapped to the middle 72 subcarriers (excluding the direct current DC subcarriers) of the system bandwidth;
mapping the MBSFN PSS/SSS/synchronization signal sequence with the length of 288 to the middle 288 subcarriers (excluding DC subcarriers) of the system bandwidth for the case of 3.75kHz subcarrier spacing; alternatively, the MBSFN PSS/SSS/synchronization signal sequence with the length of 72 is mapped to the middle 72 subcarriers (excluding DC subcarriers) of the system bandwidth; alternatively, the MBSFN PSS/SSS/synchronization signal sequence with the length of 144 is mapped to the middle 144 subcarriers (not including DC subcarriers) of the system bandwidth;
wherein the conventional synchronization signal and/or DRS is based on cell identity
Figure BDA0000957110300000121
Generated, and the MBSFN synchronization signals and/or MBSFN-DRS of the embodiment of the invention are generated according to the MBSFN area identification.
Wherein, MBSFN-DRS includes MBSFN synchronous signal and MBSFN RS.
The MBSFN-DRS is used for MBSFN cell discovery, downlink synchronization and channel measurement, and signals in the MBSFN-DRS are generated according to the MBSFN area identification.
Wherein the MBSFN synchronization signal comprises an MBSFN PSS sequence and an MBSFN SSS sequence, and generating the MBSFN synchronization signal according to the MBSFN area identification comprises:
determining parameters for generating MBSFN PSS sequences and parameters for generating MBSFN SSS sequences according to the MBSFN area identification;
determining a root factor according to the determined parameters for generating the MBSFN PSS sequence, and generating an initial MBSFN PSS sequence according to the determined root factor; generating an initial SSS sequence according to the determined parameters for generating the MBSFN SSS sequence;
respectively supplementing 5 0 s before and after the initial MBSFN PSS sequence to obtain an MBSFN PSS sequence, and supplementing 5 0 s before and after the initial MBSFN SSS sequence to obtain an MBSFN SSS sequence;
or, respectively supplementing 5m 0 s before and after the sequence obtained by interpolation of the initial MBSFN PSS sequence to obtain an MBSFN PSS sequence, and supplementing 5m 0 s before and after the sequence obtained by interpolation of the initial MBSFN SSS sequence to obtain an SSS sequence; wherein m is the ratio between the number of subcarriers contained in one RB and 12;
or, interpolation is performed on sequences obtained by supplementing 5 0 before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and interpolation is performed on sequences obtained by supplementing 5 0 before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence.
Wherein determining parameters for generating the MBSFN PSS sequence and parameters for generating the MBSFN SSS sequence according to the MBSFN area identification comprises:
according to the formula
Figure BDA0000957110300000131
Determining parameters for generating MBSFN SSS sequences and parameters for generating MBSFN PSS sequences;
wherein ,
Figure BDA0000957110300000132
for MBSFN area identification, n is +.>
Figure BDA0000957110300000133
The number of values of->
Figure BDA0000957110300000134
For the parameters for generating MBSFN SSS sequences, < + >>
Figure BDA0000957110300000135
Is a parameter for generating MBSFN PSS sequences.
The value ranges of the parameters for generating the MBSFN PSS sequence and the parameters for generating the MBSFN SSS sequence may be existing value ranges, or redefined value ranges according to the value ranges of the MBSFN area identifier.
For example, in conventional methods, the cell identity is used
Figure BDA0000957110300000136
Generating, cell identity +.>
Figure BDA0000957110300000137
The range of the value of the parameter for generating the MBSFN SSS sequence is 0-503, the range of the value of the parameter for generating the MBSFN SSS sequence is 0-20 to 167; the method of the embodiment of the invention is generated according to the MBSFN area identification, wherein the value range of the MBSFN area identification is 0-255, the value range of the parameters for generating the MBSFN PSS sequence is 0-2, and the value range of the parameters for generating the MBSFN SSS sequence is 0-167; or redefining the value range of the parameters for generating the MBSFN PSS sequence to be 0-1, and the value range of the parameters for generating the MBSFN SSS sequence to be 0-127; or the value range of the parameter for generating the MBSFN PSS sequence is 0-3, and the value range of the parameter for generating the MBSFN SSS sequence is 0-63. Of course, the range of values of the parameters for generating the MBSFN PSS sequence and the parameters for generating the MBSFN SSS sequence may be redefined in other manners, as long as the product between the number of possible values of the parameters for generating the MBSFN PSS sequence and the number of possible values of the parameters for generating the MBSFN SSS sequence is greater than or equal to the number of possible values of the MBSFN area identifier.
Wherein the MBSFN synchronization signal comprises an MBSFN synchronization signal sequence;
generating the MBSFN synchronization signal according to the MBSFN area identification comprises:
determining parameters for generating the MBSFN synchronous signal sequence as MBSFN area identification;
generating an initial MBSFN synchronous signal sequence according to the determined parameters for generating the MBSFN synchronous signal sequence;
respectively supplementing 5 0 s before and after the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
or, respectively supplementing 5m 0 s before and after the sequence obtained after interpolation of the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
or, interpolation is carried out on sequences obtained by supplementing 5 0 before and after the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
where m is the ratio between the number of subcarriers contained in one RB and 12.
Wherein, determining the root factor according to the determined parameters for generating the MBSFN PSS sequence comprises:
and searching the determined root factors corresponding to the parameters for generating the MBSFN PSS sequence in the corresponding relation between the parameters for generating the MBSFN PSS sequence and the root factors.
Wherein the root factor in the corresponding relationship has any two values of 25, 29 and 34.
After determining the parameters for generating the MBSFN PSS sequence and the value range of the parameters for generating the MBSFN SSS sequence, the root factor may be determined according to the existing correspondence, or the correspondence between the parameters for generating the MBSFN PSS sequence and the root factor may be redefined. For example, in the existing method, when the parameter for generating the MBSFN PSS sequence takes 0, the root factor takes 25; when the parameter for generating the MBSFN PSS sequence takes 1, the root factor takes 29; when the parameters for generating MBSFN PSS sequence are taken as 2, the root factor is taken as 34. In the method of the embodiment of the invention, when the parameter for generating the MBSFN PSS sequence takes 0, the root factor can take any one of 25, 29 and 34; when the parameter for generating the MBSFN PSS sequence takes 1, the root factor may take any one of 25, 29 and 34, as long as it is ensured that the root factors corresponding to the different parameters for generating the MBSFN PSS sequence have different values.
Wherein interpolating the initial MBSFN PSS/SSS/synchronization signal sequence comprises:
inserting (m-1) 0 s or (m-1) the same value as each element in the initial MBSFN PSS/SSS/synchronization signal sequence before or after the element;
alternatively, 12 (m-1) values are inserted before or after every 12 elements in the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12 (m-1) values are each 0, or each of the inserted 12 (m-1) values is the same as one of the 12 elements;
alternatively, (m-1) k values are inserted before or after the initial MBSFN PSS/SSS/synchronization signal sequence; where k is the total number of elements of the initial MBSFN PSS/SSS sequence, the inserted (m-1) k values are all 0, or each of the inserted (m-1) k values is the same as one element of the initial MBSFN PSS/SSS/synchronization signal sequence.
Wherein interpolating sequences obtained by supplementing 5 0 before and after the initial MBSFN PSS/SSS/synchronous signal sequence respectively comprises:
inserting (m-1) 0 s or (m-1) the same value as each element in the sequence obtained by supplementing 5 0 s before and after the initial MBSFN PSS/SSS/synchronization signal sequence respectively;
alternatively, 12 (m-1) values are inserted before or after each 12 elements in the sequence obtained by supplementing 5 0 before and after the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12 (m-1) values are each 0, or each of the inserted 12 (m-1) values is the same as one of the 12 elements;
Alternatively, (m-1) k values are inserted before or after the sequence obtained by supplementing 5 0 s before and after the initial MBSFN PSS/SSS/synchronization signal sequence respectively; where k is the total number of elements of the initial MBSFN PSS/SSS sequence, the inserted (m-1) k values are all 0, or each of the inserted (m-1) k values is the same as one element of the initial MBSFN PSS/SSS/synchronization signal sequence.
For example, for a subcarrier spacing of 15kHz, each Resource Block (RB) includes 12 subcarriers, and the length of each of the MBSFN PSS sequence and the MBSFN SSS sequence is 62, including 5 0 on both sides of the MBSFN PSS sequence and the MBSFN SSS sequence, respectively, the MBSFN PSS sequence and the MBSFN SSS sequence need to be mapped onto 72 subcarriers, and thus, 6 RBs are required to transmit the MBSFN PSS sequence and the MBSFN SSS sequence.
For subcarrier spacings smaller than 15kHz, such as 7.5kHz or 3.75kHz, based on an initial MBSFN PSS sequence and MBSFN SSS sequence generated from the MBSFN area identification; or the MBSFN PSS sequence and the MBSFN SSS sequence are generated by interpolation of sequences obtained by supplementing 5 0 before and after the initial MBSFN PSS sequence and sequences obtained by supplementing 5 0 before and after the initial MBSFN SSS sequence. For example, for a subcarrier spacing of 7.5kHz, each RB includes 24 subcarriers, the MBSFN PSS sequence and MBSFN SSS sequence of original length 62 may be transmitted with 3 RBs, or may be repeated or interpolated by 0, such as (s 1,0, s2,0, s3,0, s4,0,) for s62,0, or by element repetition, such as (s 1, s1, s2, s2, s3, s3, s4, s4,, s62, or by RB repetition or interpolation, such as (s 1, s2, s3,) for s12, s13, s14, s15,) for s62, or by the entire PSS sequence and MBSFN SSS sequence, such as (s 1, s2,) for s62, s1, s2,, s 62. Wherein s1, s2, … …, s62 are elements of MBSFN PSS sequences or MBSFN SSS sequences.
The generating the initial MBSFN PSS sequence or the initial MBSFN SSS sequence according to the determined root factor may be implemented by using a technique known to those skilled in the art, and is not used to limit the protection scope of the present invention, and is not repeated here.
In this step, the MBSFN subframe including the newly defined downlink signal is a dedicated carrier MBSFN subframe or a MBSFN subframe of a mixed carrier with unicast.
In this step, the subframes configured as unicast subframes are not configured as other types of subframes; wherein, other types of subframes comprise dedicated carrier MBSFN subframes and/or MBSFN subframes of mixed carrier with unicast;
and/or, MBSFN subframes that contain unicast portions are not configured as dedicated carrier MBSFN subframes.
Optionally, the method further comprises the following steps:
step 101, the base station sends configuration information of the unicast subframe, and/or configuration information of a unicast part in the MBSFN subframe, and/or configuration information of the MBSFN subframe including the unicast part, and/or configuration information of the MBSFN subframe including the newly defined downlink signal to the UE.
In this step, the base station transmits configuration information to the UE through radio resource control protocol (RRC, radio Resource Control) signaling or downlink control signaling (DCI, downlink Control Information).
In this step, when some or all of the configuration information is a value that is known by, or agreed upon, or well-defined by the base station and the UE, the base station does not need to send the known, or agreed upon, or well-defined by the protocol, configuration information to the UE. For example, the synchronization signal is transmitted every 5 milliseconds (ms) at sub-frame 0 and sub-frame 5, respectively, so that the base station does not need to transmit configuration information to the UE.
In this step, the configuration information includes transmission configuration information and/or measurement configuration information.
Wherein, the sending configuration information is the same as the measuring configuration information;
alternatively, the measurement configuration information is a subset of the transmission configuration information.
Wherein the sending configuration information includes any one or more of:
the base station transmits a unicast subframe, and/or a unicast portion in an MBSFN subframe, and/or an MBSFN subframe including a unicast portion, and/or a transmission period of an MBSFN subframe including a newly defined downlink signal, the base station transmits a unicast subframe, and/or a unicast portion in an MBSFN subframe, and/or a transmission offset of an MBSFN subframe including a unicast portion, and/or a unicast portion in an MBSFN subframe, and/or a transmission duration of an MBSFN subframe including a unicast portion, and/or a transmission duration or number of symbols of a unicast portion in an MBSFN subframe.
The transmission period of the unicast subframes transmitted by the base station is the same as the transmission period of the DRS subframes transmitted by the base station, the transmission offset of the unicast subframes transmitted by the base station is the same as the transmission offset of the DRS subframes transmitted by the base station, and the transmission duration of the unicast subframes transmitted by the base station is the same as the transmission duration of the DRS subframes transmitted by the base station. That is, the original DRS subframe is configured as a unicast subframe to transmit the downlink signal.
Wherein the base station transmits unicast subframes, and/or unicast portions in MBSFN subframes, and/or the transmission period of MBSFN subframes that include unicast portions is greater than 5 milliseconds (ms).
Wherein the measurement configuration information includes any one or more of:
the measurement period of the UE on the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, the measurement offset of the UE on the unicast subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, the measurement duration of the UE on the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, the duration or the number of symbols of the unicast portion in the MBSFN subframe.
The measurement period of the unicast subframe by the UE is the same as the measurement period of the DRS measurement timing configuration (DMTC, DRS Measuring Timing Configuration) subframe by the UE, the measurement offset of the unicast subframe by the UE is the same as the measurement offset of the DMTC subframe by the UE, and the measurement duration of the unicast subframe by the UE is the same as the measurement duration of the DMTC subframe by the UE.
That is, the transmission period of the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, and the measurement period of the UE on the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal may be the same or different; the transmission offset of the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe containing the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal, and the measurement offset of the UE on the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe containing the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal, may be the same or different; the sending duration of the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe containing the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal by the base station and the measuring duration of the UE on the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe containing the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal may be the same or different.
In general, the transmission offset of the unicast subframe and/or the unicast portion in the MBSFN subframe and/or the MBSFN subframe including the unicast portion and/or the MBSFN subframe including the newly defined downlink signal is the same as the measurement offset of the UE on the unicast subframe and/or the unicast portion in the MBSFN subframe and/or the MBSFN subframe including the unicast portion and/or the MBSFN subframe including the newly defined downlink signal, and the transmission duration of the unicast subframe and/or the unicast portion in the MBSFN subframe and/or the MBSFN subframe including the unicast portion and/or the MBSFN subframe including the newly defined downlink signal is the same as the measurement duration of the UE on the unicast subframe and/or the unicast portion in the MBSFN subframe and/or the MBSFN subframe including the unicast portion and/or the MBSFN subframe including the newly defined downlink signal is the same, which is not excluded.
The conventional MBSFN subframe of the mixed carrier with unicast includes a unicast portion and an MBSFN portion, and the conventional MBSFN subframe of the dedicated carrier does not include a unicast portion. In the above method, the unicast subframe or the MBSFN subframe including the unicast portion is transmitted in a preconfigured subframe, a signal for implementing synchronization or a signal for implementing measurement, etc., and the unicast subframe or the MBSFN subframe including the unicast portion may be configured to be periodically or aperiodically transmitted, that is, not limited to be configured to be transmitted only in subframe 0 or subframe 5, but other subframes may be configured to be configured as an MBSFN subframe with a unicast mixed carrier, or a dedicated carrier MBSFN subframe, or a unicast subframe, etc., and how to configure the unicast subframe or the MBSFN subframe is specifically, the method of the embodiment of the present invention is not limited.
In the above method, whether all downlink subframes in the radio frame are configured as dedicated carrier MBSFN subframes or other types of subframes, or whether part of downlink subframes in the radio frame are configured as dedicated carrier MBSFN subframes or other types of subframes, unicast subframes or MBSFN subframes including unicast parts are transmitted in preconfigured subframes, that is, subframes where unicast subframes or unicast parts are located are not configured as subframes of other types any more for transmission.
For example, all downlink subframes are configured as dedicated carrier MBSFN subframes, including subframe 0, subframe 1, subframe 2, … …. In actual transmission, the unicast sub-frames or unicast parts are arranged in sub-frame 0, sub-frame 40, sub-frames 80, … …, and in sub-frame 0, sub-frame 40, sub-frames 80, … …, transmission is performed according to the arranged unicast sub-frames or unicast parts, but not according to the arranged dedicated carrier MBSFN sub-frames.
For another example, the transmission period of the unicast subframe or the subframe where the unicast part is located is 40ms or 80ms or 160ms, the transmission offset is 0ms to (transmission period-1) ms, and the transmission duration is 1-6ms.
Here, it is assumed that a transmission period of a unicast subframe or a subframe in which a unicast portion is located is 40ms, a transmission offset is 0ms, and a transmission period is 1ms. The base station transmits a unicast subframe or unicast portion on the corresponding subframe of 0-1 ms, 40-41 ms, 80-81 ms, … …, as shown in fig. 2.
That is, the 0 to 1ms, 40 to 41ms, 80 to 81ms, … …, corresponding subframes are configured as unicast subframes or MBSFN subframes including unicast portions, and whether or not all downlink subframes in the radio frame are configured as MBSFN subframes or other types of subframes, as shown in fig. 2 and 3, the 0 to 1ms, 40 to 41ms, 80 to 81ms, … …, corresponding subframes are used to transmit unicast subframes or MBSFN subframes including unicast portions.
For the case that the subcarrier spacing is 15kHz (for MBSFN subframes), since the duration of one OFDM symbol and the number of subcarriers included in each RB are consistent with the prior art, a downlink signal or a downlink channel may be transmitted in a pre-configured unicast subframe and/or an MBSFN subframe including a unicast portion.
For the case where the subcarrier spacing is 7.5kHz or less (for MBSFN subframes), a unicast subframe is configured to transmit a downlink signal or downlink channel.
In particular for long CP subframes (e.g., equal to or greater than 33.33 microseconds (us)), MBSFN subframes are not suitable for transmitting legacy downlink signals or channels, such as CRS, comprising a unicast portion (one or more OFDM symbols) for a case where the subcarrier spacing is not 15kHz (e.g., 7.5kHz or lower), because both the subframe structure and symbol length change, and legacy downlink channels or downlink signals are not suitable for transmission on such MBSFN subframes. At this time, a dedicated unicast subframe may be configured to transmit a conventional downlink signal or downlink channel.
For conventional DRSs, the DRS is transmitted according to a set transmission period, transmission offset, and transmission duration. The DRS may be transmitted in a unicast subframe or an MBSFN subframe. If the configured subframe for transmitting the DRS falls on a unicast subframe or on an MBSFN subframe, the DRS may be transmitted on both subframe types. In fact, the related art does not consider how the DRS is transmitted when the subcarrier is at a subcarrier spacing of 7.5kHz or less. In addition, although 15kHz is used for the subcarrier, when the number of symbols in the subframe is changed, how the DRS is transmitted is not solved. The above solution can solve this. I.e. the DRS is transmitted on unicast subframes, or the subframes used for transmitting the DRS or DMTC are configured as unicast subframes.
Each cell in a conventional MBSFN area is based on its own cell identity
Figure BDA0000957110300000201
PSS or SSS are generated (as taught in 3gpp TS 36.211) and cannot be transmitted in MBSFN parts. In the related art, therefore, subframe 0 and subframe 5 cannot be configured as MBSFN subframes, but may be used to transmit PSS or SSS and measurement signals or control channels. For a separate (standby) scenario or a scenario where subframe 0 or subframe 5 is configured as an MBSFN subframe or the like, MBSFN cells need to have downlink synchronization or measurement capability, while PSS or SSS transmitted by each cell of an MBSFN area or synchronization area is different.
Alternatively, when a subframe is configured as a unicast subframe, or an MBSFN subframe that includes a unicast portion, the subframe can no longer be configured as a dedicated MBSFN subframe, and/or other types of subframes.
Specifically, when a subframe is configured as a unicast subframe, the subframe cannot be configured as a dedicated MBSFN subframe and an MBSFN subframe of a mixed carrier with unicast; when a subframe is configured as an MBSFN subframe that includes a unicast portion, the subframe cannot be configured as a dedicated MBSFN subframe, or as a unicast-mixed MBSFN subframe for transmitting other signals.
Referring to fig. 4, the embodiment of the present invention further provides an apparatus for transmitting a downlink signal and/or a downlink channel, including:
a first sending module, configured to send a downlink signal or a downlink channel to a user equipment UE in a pre-configured unicast subframe, and/or a unicast portion in a multicast or multicast single frequency network MBSFN subframe, and/or an MBSFN subframe that includes a unicast portion, and/or an MBSFN subframe that includes a newly defined downlink signal;
wherein the pre-configured unicast subframe, and/or the MBSFN subframe containing the unicast portion, and/or the MBSFN subframe containing the newly defined downlink signal comprise any one or more subframes.
The device of the embodiment of the invention further comprises:
and the second sending module is used for sending the configuration information of the unicast subframe, and/or the configuration information of the unicast part in the MBSFN subframe, and/or the configuration information of the MBSFN subframe containing the unicast part, and/or the configuration information of the MBSFN subframe containing the newly defined downlink signal to the UE.
In the device of the embodiment of the present invention, the second sending module is specifically configured to:
and sending the configuration information to the UE through a radio resource control protocol (RRC) signaling or downlink control signaling (DCI).
It should be noted that the above-mentioned embodiments are only for the convenience of understanding, and are not intended to limit the scope of the present invention, and any obvious substitutions and modifications made by those skilled in the art without departing from the inventive concept of the present invention are within the scope of the present invention.

Claims (31)

1. A method of transmitting a downlink signal and/or a downlink channel, comprising:
the base station transmits downlink signals or downlink channels to the User Equipment (UE) in a pre-configured unicast subframe and/or a unicast part in a multicast or multicast single frequency network (MBSFN) subframe and/or an MBSFN subframe containing the unicast part and/or an MBSFN subframe containing newly defined downlink signals;
Wherein the pre-configured unicast subframe, and/or the MBSFN subframe containing the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal comprise any one or more subframes;
the base station transmits any one or more downlink signals or downlink channels in the unicast subframe or the unicast part, wherein the downlink signals or the downlink channels are as follows:
signals for realizing synchronization, signals for realizing measurement, signals for realizing demodulation, downlink channels, newly defined downlink signals;
the signals for achieving synchronization include any one or more of the following:
discovery signal DRS, cell-specific pilot CRS, primary synchronization signal PSS, and secondary synchronization signal SSS.
2. The method according to claim 1, characterized in that the method is preceded by:
the base station sends the configuration information of the unicast subframe, and/or the configuration information of the unicast part in the MBSFN subframe, and/or the configuration information of the MBSFN subframe containing the unicast part, and/or the configuration information of the MBSFN subframe containing the newly defined downlink signal to the UE.
3. The method according to claim 2, wherein the base station sends the configuration information to the UE via radio resource control protocol, RRC, signaling or downlink control signaling, DCI.
4. Method according to claim 2, characterized in that the configuration information comprises transmission configuration information and/or measurement configuration information.
5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,
the sending configuration information is the same as the measuring configuration information;
alternatively, the measurement configuration information is a subset of the transmission configuration information.
6. The method of claim 4, wherein the sending configuration information includes any one or more of:
the base station transmits the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or a transmission period of the MBSFN subframe including the newly defined downlink signal, a transmission offset of the base station transmitting the unicast subframe, and/or the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a transmission duration of the base station transmitting the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or a transmission duration of the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a duration or symbol number of the unicast portion in the MBSFN subframe.
7. The method of claim 6 wherein the transmission period of the unicast subframe transmitted by the base station is the same as the transmission period of the DRS subframe transmitted by the base station, wherein the transmission offset of the unicast subframe transmitted by the base station is the same as the transmission offset of the DRS subframe transmitted by the base station, and wherein the transmission duration of the unicast subframe transmitted by the base station is the same as the transmission duration of the DRS subframe transmitted by the base station.
8. The method of claim 6, wherein the base station transmits the unicast subframe, and/or a unicast portion of the MBSFN subframes, and/or a transmission period of the MBSFN subframes that include unicast portions is greater than 5 ms.
9. The method of claim 4, wherein the measurement configuration information includes any one or more of:
the UE measures a period of measurement of the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a measurement offset of the UE to the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the newly defined downlink signal, a measurement duration of the UE to the unicast subframe, and/or a unicast portion in the MBSFN subframe, and/or the MBSFN subframe including the unicast portion, and/or the MBSFN subframe including the newly defined downlink signal, a duration or a number of symbols of the unicast portion in the MBSFN subframe.
10. The method of claim 9, wherein the measurement period of the unicast subframe by the UE is the same as the measurement period of the DMTC subframe configured for DRS measurement by the UE, wherein the measurement offset of the unicast subframe by the UE is the same as the measurement offset of the DMTC subframe by the UE, and wherein the measurement duration of the unicast subframe by the UE is the same as the measurement duration of the DMTC subframe by the UE.
11. The method according to claim 1 or 2, characterized in that the method is preceded by:
the base station configures a subframe for transmitting a DRS or a DMTC as the unicast subframe.
12. The method according to claim 1 or 2, wherein subframes configured as the unicast subframes are not configured as other types of subframes; wherein the other types of subframes comprise dedicated carrier MBSFN subframes and/or MBSFN subframes of mixed carrier with unicast;
and/or, the MBSFN subframe including the unicast portion is not configured as a dedicated carrier MBSFN subframe.
13. The method of claim 1, wherein the signals for effecting the measurements include any one or more of:
discovery signal DRS, cell-specific pilot CRS, channel state information measurement pilot CSI-RS.
14. The method of claim 1, wherein the signal for implementing demodulation comprises: the downlink UE is dedicated to the pilot UE-specific RS.
15. The method of claim 1, wherein the downlink channel comprises any one or more of:
physical downlink control channel PDCCH, physical control format indicator channel PCFICH, physical hybrid automatic repeat indicator channel PHICH, enhanced physical downlink control channel EPDCCH.
16. The method according to claim 1 or 2, characterized in that the MBSFN subframe containing the newly defined downlink signal is a dedicated carrier MBSFN subframe or an MBSFN subframe mixed with unicast carrier.
17. The method according to claim 1 or 2, characterized in that the newly defined downlink signal comprises an MBSFN synchronization signal and/or an MBSFN-DRS.
18. The method of claim 17, wherein the MBSFN subframe that includes the newly defined downlink signal comprises: subframe 0, and/or subframe 5, and/or subframe 1, and/or subframe 6.
19. The method of claim 18, wherein the step of providing the first information comprises,
the MBSFN synchronous signal is sent on the last OFDM symbol of the first time slot of the subframe 0 and/or the subframe 5, and/or the MBSFN synchronous signal is sent on the last-to-last OFDM symbol of the first time slot of the subframe 0 and/or the subframe 5;
Alternatively, the MBSFN synchronization signal is transmitted on the third OFDM symbol of subframe 1 and/or subframe 6, and/or the MBSFN synchronization signal is transmitted on the last OFDM symbol of subframe 1 and/or subframe 5.
20. The method of claim 17, wherein the MBSFN synchronization signal and/or MBSFN-DRS are generated according to an MBSFN area identification.
21. The method of claim 20, wherein the MBSFN-DRS comprises the MBSFN synchronization signal and an MBSFN reference signal, RS.
22. The method of claim 20, wherein the MBSFN synchronization signals comprise a MBSFN master synchronization signal PSS sequence and a MBSFN slave synchronization signal SSS sequence, and wherein generating the MBSFN synchronization signals from the MBSFN area identification comprises:
determining parameters for generating MBSFN PSS sequences and parameters for generating MBSFN SSS sequences according to the MBSFN area identification;
determining a root factor according to the determined parameters for generating the MBSFN PSS sequence, and generating an initial MBSFN PSS sequence according to the determined root factor; generating an initial SSS sequence according to the determined parameters for generating the MBSFN SSS sequence;
supplementing 5 0 s before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and supplementing 5 0 s before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence;
Or, respectively supplementing 5m 0 s before and after the sequence obtained by interpolating the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and supplementing 5m 0 s before and after the sequence obtained by interpolating the initial MBSFN SSS sequence to obtain the SSS sequence;
or, interpolating sequences obtained by supplementing 5 0 before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and interpolating sequences obtained by supplementing 5 0 before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence;
where m is the ratio between the number of subcarriers contained in one RB and 12.
23. The method of claim 22, wherein the determining parameters for generating MBSFN PSS sequences and parameters for generating MBSFN SSS sequences from the MBSFN area identification comprises:
according to the formula
Figure QLYQS_1
Determining the parameters for generating MBSFN SSS sequences and the parameters for generating MBSFN PSS sequences;
wherein ,
Figure QLYQS_2
for the MBSFN area identification, n is +.>
Figure QLYQS_3
The number of values of->
Figure QLYQS_4
For the parameters for generating MBSFN SSS sequences, < + >>
Figure QLYQS_5
Is a parameter for generating MBSFN PSS sequences.
24. The method of claim 23, wherein the step of determining the position of the probe is performed,
The said
Figure QLYQS_6
The value of (2) is 0-167, said +.>
Figure QLYQS_7
The value range of (2) is 0-2;
alternatively, the described
Figure QLYQS_8
The value of (2) is 0-127, said +.>
Figure QLYQS_9
The value range of (2) is 0-1;
alternatively, the described
Figure QLYQS_10
The value of (2) is in the range of 0-63, said +.>
Figure QLYQS_11
The range of the value of (2) is 0-3.
25. The method of claim 22, wherein the determining a root factor based on the determined parameters for generating MBSFN PSS sequences comprises:
searching a root factor corresponding to the determined parameter for generating the MBSFN PSS sequence in the corresponding relation between the parameter for generating the MBSFN PSS sequence and the root factor;
wherein the root factor in the correspondence is any two of 25, 29 and 34.
26. The method of claim 20, wherein the MBSFN synchronization signal comprises an MBSFN synchronization signal sequence;
the generating the MBSFN synchronization signal according to the MBSFN area identification comprises:
determining parameters for generating MBSFN synchronous signal sequences as the MBSFN area identification;
generating an initial MBSFN synchronous signal sequence according to the determined parameters for generating the MBSFN synchronous signal sequence;
respectively supplementing 5 0 s before and after the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
Or, respectively supplementing 5m 0 s before and after the sequence obtained by interpolating the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
or, interpolating sequences obtained by supplementing 5 0 before and after the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;
where m is the ratio between the number of subcarriers contained in one RB and 12.
27. The method of claim 22 or 26, wherein the interpolating the initial MBSFN PSS/SSS/synchronization signal sequence comprises:
inserting (m-1) 0 s or (m-1) the same value as each element in the initial MBSFN PSS/SSS/synchronization signal sequence before or after the element;
alternatively, 12 (m-1) values are inserted before or after every 12 elements in the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12 (m-1) values are each 0, or each of the inserted 12 (m-1) values is the same as one of the 12 elements;
alternatively, (m-1) k values are inserted before or after the initial MBSFN PSS/SSS/synchronization signal sequence; wherein k is the total number of elements of the initial MBSFN PSS/SSS sequence, the inserted (m-1) k values are all 0, or each of the inserted (m-1) k values is the same as one element of the initial MBSFN PSS/SSS/synchronization signal sequence.
28. The method of claim 22 or 26, wherein interpolating the sequences that are respectively obtained by supplementing 5 0's before and after the initial MBSFN PSS/SSS/synchronization signal sequence comprises:
inserting (m-1) 0 s or (m-1) the same value as each element in the sequence obtained by supplementing 5 0 s before and after the initial MBSFN PSS/SSS/synchronization signal sequence respectively;
alternatively, 12 (m-1) values are inserted before or after each 12 elements in the sequence obtained by supplementing 5 0 before and after the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12 (m-1) values are each 0, or each of the inserted 12 (m-1) values is the same as one of the 12 elements;
alternatively, (m-1) k values are inserted before or after the sequence obtained by supplementing 5 0 s before and after the initial MBSFN PSS/SSS/synchronization signal sequence respectively; wherein k is the total number of elements of the initial MBSFN PSS/SSS sequence, the inserted (m-1) k values are all 0, or each of the inserted (m-1) k values is the same as one element of the initial MBSFN PSS/SSS/synchronization signal sequence.
29. An apparatus for transmitting a downlink signal and/or a downlink channel, comprising:
A first sending module, configured to send a downlink signal or a downlink channel to a user equipment UE in a pre-configured unicast subframe, and/or a unicast portion in a multicast or multicast single frequency network MBSFN subframe, and/or an MBSFN subframe that includes a unicast portion, and/or an MBSFN subframe that includes a newly defined downlink signal;
wherein the pre-configured unicast subframe, and/or the MBSFN subframe containing the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal comprise any one or more subframes;
the first sending module sends any one or more of the following downlink signals or downlink channels in the unicast subframe or the unicast part:
signals for realizing synchronization, signals for realizing measurement, signals for realizing demodulation, downlink channels, newly defined downlink signals;
the signals for achieving synchronization include any one or more of the following:
discovery signal DRS, cell-specific pilot CRS, primary synchronization signal PSS, and secondary synchronization signal SSS.
30. The apparatus as recited in claim 29, further comprising:
and the second sending module is used for sending the configuration information of the unicast subframe, the configuration information of the unicast part in the MBSFN subframe, the configuration information of the MBSFN subframe containing the unicast part and/or the configuration information of the MBSFN subframe containing the newly defined downlink signal to the UE.
31. The apparatus of claim 30, wherein the second sending module is specifically configured to:
and sending the configuration information to the UE through a radio resource control protocol (RRC) signaling or downlink control signaling (DCI).
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