CN107295640A

CN107295640A - A kind of method and apparatus for sending downstream signal and/or down channel

Info

Publication number: CN107295640A
Application number: CN201610204535.XA
Authority: CN
Inventors: 徐汉青; 赵亚军; 莫林梅
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-04-01
Filing date: 2016-04-01
Publication date: 2017-10-24
Anticipated expiration: 2036-04-01
Also published as: CN107295640B; WO2017167245A1

Abstract

A kind of method and apparatus for sending and receiving downstream signal and/or down channel, including：Uni-cast portion of the base station in the unicast sub-frame, and/or multicast or multicast single-frequency network network MBSFN sub-frame being pre-configured with, and/or the MBSFN sub-frame comprising uni-cast portion, and/or the MBSFN sub-frame comprising the downstream signal newly defined send downstream signal or down channel to user equipment (UE)；Wherein, the unicast sub-frame being pre-configured with, and/or the MBSFN sub-frame comprising uni-cast portion, and/or the MBSFN sub-frame comprising the downstream signal newly defined include any one or more subframes.

Description

Method and device for sending downlink signal and/or downlink channel

Technical Field

The present disclosure relates to, but not limited to, Multicast-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 the User Equipment (UE) simultaneously receive identical waveforms transmitted from multiple cells, and the UE can treat 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 Dedicated-Carrier (DC) MBSFN mode and MBSFN mode with mixed Unicast (Unicast) Carrier. Currently, Long Term Evolution (LTE) mainly implements MBSFN mode with unicast mixed carrier. In the MBSFN mode of the unicast mixed carrier, the 1 st Orthogonal Frequency Division Multiplexing (OFDM) symbol and the 2 nd OFDM symbol in the MBSFN subframe of the unicast mixed carrier adopt a 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 a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid Automatic retransmission Indicator Channel (PHICH), and the like. Other symbols in the MBSFN subframe with the unicast mixed carrier are used for transmission of MBSFN signals. The dedicated carrier MBSFN mode is suitable for exclusive carrier deployment, and does not need to be multiplexed with a unicast signal in the same subframe. Existing LTE DC MBSFN mode employs a subcarrier spacing of 7.5 kilohertz (kHz), with each OFDM symbol in each DC MBSFN subframe twice as long as the 15kHz subcarrier spacing system. The 7.5kHz subcarrier spacing is not fully implemented in the LTE specification (i.e. there is no signaling to define an indication to use this mode and therefore cannot be implemented), at least to Rel-10 release, LTE only fully supports a 15kHz subcarrier spacing, i.e. the MBSFN mode with unicast mixed carriers described above.

In the relevant LTE protocol, for Frequency Division Duplex (FDD), only subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, and subframe 8 in each radio frame may be configured as MBSFN subframes; for Time Division Duplexing (TDD), only subframe 3, subframe 4, subframe 7, subframe 8, and 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. For example, an Enhanced Multimedia Broadcast or Multicast Service (eMBMS) is carried using a Supplemental Downlink (SDL) carrier. To avoid wasting Uplink capacity in FDD Uplink (UL) and Downlink (DL) carrier pairs, all eMBMS should be transmitted as centrally as possible on some SDL carriers. In addition, the MBSFN subframe may have no unicast part and Cell-Specific pilot (CRS), and the entire MBSFN subframe may be used to transmit Multimedia Broadcast or Multicast Service (MBMS).

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 a unicast service; for TDD, subframe 0, subframe 1, subframe 5, and subframe 6 are used to transmit a synchronization signal, a measurement signal, or a downlink signal or channel such as unicast service. If subframe 0, subframe 4, subframe 5, subframe 9; or subframe 0, subframe 1, subframe 5, and subframe 6 may all be configured as MBSFN subframes, or all MBSFN subframes in a radio frame have no unicast part, so that there is a problem how to transmit downlink signals or channels such as synchronization signals and measurement signals, which may affect both reception of MBMS service (i.e., MBSFN service) of UE and cell switching of UE. However, in the related art, a solution for transmitting downlink signals and/or downlink channels such as synchronization signals, measurement signals, unicast services and the like under the condition that all subframes in a part of radio frames are configured as MBSFN subframes or all MBSFN subframes in a part of radio frames have no unicast part is not given.

Disclosure of Invention

The embodiment of the invention provides a method and a device for sending downlink signals and/or downlink channels, which can send the downlink signals and/or the downlink channels under the condition that all subframes in part of radio frames are configured as MBSFN subframes or all MBSFN subframes in part of radio frames have no unicast part.

The embodiment of the invention provides a method for sending a downlink signal and/or a downlink channel, which comprises the following steps:

a base station sends a downlink signal or a downlink channel to 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 a newly defined downlink signal;

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.

Optionally, the method further comprises:

and 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 a radio resource control protocol RRC signaling or a downlink control signaling DCI.

Optionally, the configuration information includes sending configuration information and/or measurement configuration information.

Alternatively to this, the first and second parts may,

the sending configuration information is the same as the measurement configuration information;

or, the measurement configuration information is a subset of the transmission configuration information.

Optionally, the sending configuration information includes any one or more of the following:

the base station sends the unicast subframe, and/or a unicast part in the MBSFN subframe, and/or the transmission period of the MBSFN subframe containing the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal, the base station sends the unicast part in the MBSFN subframe, and/or the MBSFN subframe containing the unicast part, and/or the transmission offset of the unicast part, and/or the MBSFN subframe containing the newly defined downlink signal, the base station sends the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe containing the unicast part, and/or the transmission duration of the MBSFN subframe containing the newly defined downlink signal, and the duration or the number of symbols of the unicast part in the MBSFN subframe.

Optionally, a sending period of the unicast subframe sent by the base station is the same as a sending period of a discovery signal DRS subframe sent by the base station, a sending offset of the unicast subframe sent by the base station is the same as a sending offset of a DRS subframe sent by the base station, and a sending duration of the unicast subframe sent by the base station is the same as a sending duration of the DRS subframe sent by the base station.

Optionally, the transmission cycle of the base station transmitting the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe including the unicast part is greater than 5 milliseconds ms.

Optionally, the measurement configuration information includes any one or more of the following:

the measurement period 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, 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, the measurement 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, and the duration or the number of symbols of the unicast part in the MBSFN subframe.

Optionally, a measurement period of the unicast subframe by the UE is the same as a measurement period of a DMTC subframe periodically configured by the UE for DRS measurement, a measurement offset of the unicast subframe by the UE is the same as a measurement offset of the DMTC subframe by the UE, and a measurement duration of the unicast subframe by the UE is the same as a measurement duration of the DMTC subframe by the UE.

Optionally, the method further comprises:

and the base station configures the subframe for transmitting the DRS or the 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 MBSFN subframes of a special carrier and/or MBSFN subframes of a mixed carrier with unicast;

and/or the MBSFN subframe containing the unicast part is not configured as a dedicated carrier MBSFN subframe.

Optionally, the base station 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 and 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 the following:

discovery signal DRS, cell-specific pilot frequency CRS, and channel state information measurement pilot frequency CSI-RS.

Optionally, the signal for implementing demodulation includes: the downlink UE is exclusive to pilot UE-specific RS.

Optionally, the downlink channel includes any one or more of the following:

a physical downlink control channel PDCCH, a physical control format indicator channel PCFICH, a physical hybrid automatic repeat indicator channel PHICH and an enhanced physical downlink control channel EPDCCH.

Optionally, the MBSFN subframe including the newly defined downlink signal is an MBSFN subframe of a dedicated carrier or an MBSFN subframe of a mixed carrier with a 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 first and second parts may,

the MBSFN synchronization signal is transmitted on the last OFDM symbol of the first time slot of the subframe 0 and/or the subframe 5, and/or the MBSFN synchronization signal is transmitted on the second last OFDM symbol of the first time slot of the subframe 0 and/or the subframe 5;

or, 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 an MBSFN area identifier.

Optionally, the MBSFN-DRS includes the MBSFN synchronization signal and an MBSFN reference signal RS.

Optionally, the MBSFN synchronization signal includes a MBSFN primary synchronization signal PSS sequence and a MBSFN secondary synchronization signal SSS sequence, and the generating the MBSFN synchronization signal according to the MBSFN area identifier includes:

determining parameters for generating an MBSFN PSS sequence and parameters for generating an MBSFN SSS sequence according to the MBSFN area identifier;

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 50 s before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and respectively supplementing 50 s before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence;

or, respectively supplementing 5m 0 to the sequence obtained by interpolating the initial MBSFN PSS sequence before and after obtaining the MBSFN PSS sequence, and respectively supplementing 5m 0 to the sequence obtained by interpolating the initial MBSFN SSS sequence before and after obtaining the SSS sequence;

or interpolating sequences obtained by respectively supplementing 50 before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and interpolating sequences obtained by respectively supplementing 50 before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence;

where m is a ratio between the number of subcarriers included in one RB and 12.

Optionally, the determining, according to the MBSFN area identifier, the parameter for generating the MBSFN PSS sequence and the parameter for generating the MBSFN SSS sequence includes:

according to the formulaDetermining the parameters for generating the MBSFN SSS sequences and the parameters for generating the MBSFN PSS sequences;

wherein ,for the MBSFN area identification, n isThe number of the values of (a) is,for the parameters used to generate the MBSFN SSS sequences,are parameters for generating the MBSFN PSS sequence.

Alternatively to this, the first and second parts may,

the above-mentionedThe value range of (1) is 0 to 167, whereinThe value range of (1) is 0-2;

or, the saidThe value range of (a) is 0 to 127, whereinThe value range of (1) is 0-1;

or, the saidThe value range of (a) is 0 to 63, whereinThe value range of (A) is 0-3.

Optionally, the determining a root factor according to the determined parameter for generating the MBSFN PSS sequence includes:

searching the determined root factor corresponding to the 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 value of the root factor in the corresponding relation 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 identifier comprises:

determining a parameter for generating an MBSFN synchronization signal sequence as the MBSFN area identifier;

generating an initial MBSFN synchronization signal sequence according to the determined parameters for generating the MBSFN synchronization signal sequence;

respectively supplementing 50 s before and after the initial MBSFN synchronizing signal sequence to obtain the MBSFN synchronizing signal sequence;

or, respectively supplementing 5m 0 s before and after the sequence obtained by interpolating the initial MBSFN synchronization signal sequence to obtain the MBSFN synchronization signal sequence;

or, interpolating sequences obtained by respectively supplementing 50 s before and after the initial MBSFN synchronization signal sequence to obtain the MBSFN synchronization signal sequence;

where m is a ratio between the number of subcarriers included in one RB and 12.

Optionally, the interpolating the initial MBSFN PSS/SSS/synchronization signal sequence includes:

inserting (m-1) 0 or (m-1) same value of each element in the initial MBSFN PSS/SSS/synchronization signal sequence in front of or behind the element;

or, 12(m-1) values are inserted in front of or behind every 12 elements in the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12(m-1) values are all 0, or each of the inserted 12(m-1) values is the same as one of the 12 elements;

or inserting (m-1) k values in front of or behind 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 value 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 sequences obtained by respectively supplementing 50 before and after the initial MBSFN PSS/SSS/synchronization signal sequence includes:

inserting (m-1) 0 or (m-1) the same value as each element in the sequence obtained by respectively supplementing 50 before and after the initial MBSFN PSS/SSS/synchronization signal sequence;

or, inserting 12(m-1) values in front of or behind each 12 elements in sequences obtained by respectively supplementing 50 before and after the initial MBSFN PSS/SSS/synchronization signal sequence; wherein the inserted 12(m-1) values are all 0, or each of the inserted 12(m-1) values is the same as one of the 12 elements;

or inserting (m-1) k values in front of or behind sequences obtained by respectively supplementing 50 before and 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 value 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 present invention further provides a device for sending 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 part in a multicast or multicast single frequency network MBSFN subframe, and/or an MBSFN subframe including a unicast part, and/or an MBSFN subframe including a newly defined downlink signal;

Optionally, the method further includes:

a second sending module, configured to send 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 including the unicast part, and/or the configuration information of the MBSFN subframe including 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 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: a base station sends a downlink signal or a downlink channel to 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 a newly defined downlink signal; 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. According to 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 sending downlink signals and/or downlink channels, and subframes 0, 4, 5 and 9 do not need to be specially configured; or the subframe 0, the subframe 1, the subframe 5 and the subframe 6 are used for sending downlink signals and/or downlink channels, so that the downlink signals and/or the downlink channels are sent under the condition that all subframes in part of radio frames are configured as MBSFN subframes, or all MBSFN subframes in part of radio frames have no unicast part.

Drawings

The accompanying drawings in the embodiments of the present invention are described below, and the drawings in the embodiments are provided for further understanding of the present invention, and together with the description serve to explain the present invention without limiting the scope of the present invention.

Fig. 1 is a flowchart of a method for transmitting downlink signals and/or downlink channels according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating sending a unicast subframe according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating an embodiment of sending an MBSFN subframe including a unicast portion;

fig. 4 is a schematic structural diagram of a device for transmitting a downlink signal and/or a downlink channel according to an embodiment of the present invention.

Detailed Description

The following further description of the present invention, in order to facilitate understanding of those skilled in the art, is provided in conjunction with the accompanying drawings and is not intended to limit the scope of the present invention. In the present application, the embodiments and various aspects of the embodiments may be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present invention provides a method for transmitting a downlink signal and/or a downlink channel, including:

step 100, the base station sends downlink signals and/or downlink channels to the user equipment UE in a pre-configured unicast subframe, and/or a unicast part in an MBSFN subframe, and/or an MBSFN subframe containing a unicast part, and/or an MBSFN subframe containing a newly defined downlink signal.

In this step, the pre-configured unicast subframe, and/or the MBSFN subframe including the unicast part, and/or the MBSFN subframe including the newly defined downlink signal include any one or more subframes.

In this step, the base station sends any one or more of the following downlink signals and/or downlink channels in the unicast subframe or unicast part:

Wherein the signal for achieving synchronization comprises any one or more of:

discovery Signal (DRS), CRS, Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS).

Signals used to effect the measurements include any one or more of the following:

DRS, CRS, Channel State information measurement pilot (CSI-RS).

The signals used to achieve demodulation include: downlink UE-specific pilot (UE-specific RS).

Wherein, the DRS comprises CRS, PSS, SSS and 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 the following:

a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid ARQ Indicator Channel (PHICH), and an Enhanced Physical Downlink Control Channel (EPDCCH).

Wherein, the newly defined downlink signal comprises 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.

Optionally, the MBSFN synchronization signal is transmitted on the last OFDM symbol of the first slot of the subframe 0 and/or the subframe 5, and/or the MBSFN synchronization signal is transmitted on the second last OFDM symbol of the first 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.

For example, for the case of subcarrier spacing of 15kHz, the MBSFN PSS/SSS/synchronization signal sequence with length of 72 is mapped onto the middle 72 subcarriers of the system bandwidth (excluding Direct Current (DC) subcarriers);

for the case of subcarrier spacing of 7.5kHz, the MBSFN PSS/SSS/synchronization signal sequence of length 144 is mapped onto the middle 144 subcarriers of the system bandwidth (excluding the DC subcarrier); or, mapping the length 72 MBSFN PSS/SSS/synchronization signal sequence to the middle 72 subcarriers of the system bandwidth (excluding the direct current DC subcarrier);

for the case of 3.75kHz subcarrier spacing, the length 288 MBSFN PSS/SSS/synchronization signal sequence is mapped onto the middle 288 subcarriers of the system bandwidth (excluding the DC subcarrier); or, mapping the length 72 MBSFN PSS/SSS/synchronization signal sequence to the middle 72 subcarriers of the system bandwidth (excluding the DC subcarrier); or, mapping the length 144 MBSFN PSS/SSS/synchronization signal sequence to the middle 144 subcarriers of the system bandwidth (excluding DC subcarrier);

wherein, the traditional synchronous signal and/or DRS is based on the cell identificationThe MBSFN synchronization signal and/or MBSFN-DRS of the embodiment of the present invention are generated according to the MBSFN area identifier.

The MBSFN-DRS comprises an MBSFN synchronization signal and an 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 identifier.

The MBSFN synchronization signal comprises an MBSFN PSS sequence and an MBSFN SSS sequence, and the generation of the MBSFN synchronization signal according to the MBSFN area identifier comprises the following steps:

respectively supplementing 50 s before and after the initial MBSFN PSS sequence to obtain an MBSFN PSS sequence, and respectively supplementing 50 s before and after the initial MBSFN SSS sequence to obtain an MBSFN SSS sequence;

or, respectively supplementing 5m 0 to the front and back of the sequence obtained by interpolating the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and respectively supplementing 5m 0 to the front and back of the sequence obtained by interpolating the initial MBSFN SSS sequence to obtain the SSS sequence; wherein m is a ratio between the number of subcarriers included in one RB and 12;

or, interpolating sequences obtained by respectively supplementing 50 before and after the initial MBSFN PSS sequence to obtain the MBSFN PSS sequence, and interpolating sequences obtained by respectively supplementing 50 before and after the initial MBSFN SSS sequence to obtain the MBSFN SSS sequence.

Determining parameters for generating an MBSFN PSS sequence and parameters for generating an MBSFN SSS sequence according to the MBSFN area identifier comprises the following steps:

according to the formulaDetermining parameters for generating an MBSFN SSS sequence and parameters for generating an MBSFN PSS sequence;

wherein ,for MBSFN area identification, n isThe number of the values of (a) is,for the parameters used to generate the MBSFN SSS sequences,are parameters for generating the MBSFN PSS sequence.

The value ranges of the parameters for generating the MBSFN PSS sequence and the parameters for generating the MBSFN SSS sequence may adopt the existing value ranges, or redefine the value ranges according to the value ranges of the MBSFN area identifier.

For example, in conventional methods based on cell identificationGenerating, cell identityIf the value range of the sequence is 0-503, the value range of the parameter for generating the MBSFN PSS sequence is 0-2, and the value range of the parameter for generating the MBSFN SSS sequence is 0-167; the method of the embodiment of the invention is generated according to the MBSFN regional identification, the value range of the MBSFN regional identification is 0-255, the value range of the parameter for generating the MBSFN PSS sequence can be 0-2, and the value range of the parameter 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, other manners may also be adopted to redefine the value ranges of the parameter for generating the MBSFN PSS sequence and the parameter for generating the MBSFN SSS sequence, as long as the product of the number of possible values of the parameter for generating the MBSFN PSS sequence and the number of possible values of the parameter for generating the MBSFN SSS sequence is greater than or equal to the number of possible values of the MBSFN area identifier.

The MBSFN synchronization signal comprises an MBSFN synchronization signal sequence;

the step of generating the MBSFN synchronization signal according to the MBSFN area identifier comprises the following steps:

determining a parameter for generating an MBSFN synchronization signal sequence as an MBSFN area identifier;

or, interpolating sequences obtained by respectively supplementing 50 before and after the initial MBSFN synchronous signal sequence to obtain the MBSFN synchronous signal sequence;

where m is a ratio between the number of subcarriers included 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 factor corresponding to the parameter for generating the MBSFN PSS sequence in the corresponding relation between the parameter for generating the MBSFN PSS sequence and the root factor.

After the value ranges of the parameters for generating the MBSFN PSS sequence and the parameters for generating the MBSFNSSS sequence are determined, the root factor may be determined according to the existing corresponding relationship, or the corresponding relationship between the parameters for generating the MBSFN PSS sequence and the root factor may be redefined. For example, in the existing method, when a parameter for generating the MBSFN PSS sequence is 0, the root factor is 25; when the parameter for generating the MBSFN PSS sequence is 1, the root factor is 29; when the parameter for generating the MBSFN PSS sequence is 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 MBSFNPSS sequence is 0, the root factor can be any one of 25, 29 and 34; when the parameter for generating the MBSFN PSS sequence is 1, the root factor may be any one of 25, 29 and 34, as long as the values of the root factors corresponding to different parameters for generating the MBSFN PSS sequence are different.

Wherein, the interpolation of the initial MBSFN PSS/SSS/synchronization signal sequence comprises the following steps:

or inserting (m-1) k values in front of or behind 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.

Wherein, the interpolation of sequences obtained by respectively supplementing 50 before and after the initial MBSFN PSS/SSS/synchronization signal sequence comprises the following steps:

or inserting (m-1) k values in front of or behind sequences obtained by respectively supplementing 50 before and 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.

For example, for the case of a subcarrier spacing of 15kHz, each Resource Block (RB) includes 12 subcarriers, the length of the MBSFN PSS sequence and the MBSFN SSS sequence is 62, and 50 s including both sides of the MBSFN PSS sequence and the MBSFN SSS sequence respectively need to map the MBSFN PSS sequence and the MBSFN SSS sequence to 72 subcarriers, and thus, 6 RBs are needed 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 initial MBSFN PSS and SSS sequences generated from MBSFN area identification; or generating the MBSFN PSS sequence and the MBSFN SSS sequence by adopting an interpolation mode through sequences obtained by respectively supplementing 50 sequences to the front and the back of the initial MBSFN PSS sequence and sequences obtained by respectively supplementing 50 sequences to the front and the back of the initial MBSFN SSS sequence. For example, for the case of a subcarrier spacing of 7.5kHz, each RB includes 24 subcarriers, the MBSFN PSS sequence and the MBSFN SSS sequence of original length 62 may be transmitted using 3 RBs, or may be transmitted by inserting 0 in the MBSFN PSS sequence and the MBSFN SSS sequence, such as (s1, 0, s1, 0, s1, 0, s1, 0), or by repeating an element, such as (s1, s1, s1, s1, s1, or by repeating or inserting 0, such as (s1, s1, s1, s1, s1, s 36. Wherein s1, s2, … …, s62 are elements of an MBSFN PSS sequence or an MBSFN SSS sequence.

Specifically, how to generate the initial MBSFN PSS sequence or the initial MBSFN SSS sequence according to the determined root factor may be implemented by using techniques well known to those skilled in the art, and is not used to limit the protection scope of the present invention, and is not described herein again.

In this step, the MBSFN subframe including the newly defined downlink signal is an MBSFN subframe of a dedicated carrier or an MBSFN subframe of a mixed carrier with unicast.

In this step, the subframes configured as unicast subframes are not configured as subframes of other types; the other types of subframes comprise MBSFN subframes of a special carrier and/or MBSFN subframes of a 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:

step 101, the base station sends configuration information of a unicast subframe, and/or configuration information of a unicast part in an MBSFN subframe, and/or configuration information of an MBSFN subframe containing a unicast part, and/or configuration information of an MBSFN subframe containing a newly defined downlink signal to the UE.

In this step, the base station transmits the configuration Information to the UE through Radio Resource Control (RRC) signaling or Downlink Control signaling (DCI).

In this step, when part or all of the configuration information is a value known or agreed to by the base station and the UE or a value clearly defined by the protocol, the base station does not need to send the configuration information known or agreed to or clearly defined by the protocol to the UE. For example, the synchronization signal is transmitted every 5 milliseconds (ms), respectively in subframe 0 and subframe 5, such that the base station does not need to transmit the configuration information to the UE.

In this step, the configuration information includes sending configuration information and/or measuring configuration information.

Wherein the sending configuration information is the same as the measurement 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 part in an MBSFN subframe, and/or an MBSFN subframe containing the unicast part, and/or a transmission period of the MBSFN subframe containing a newly defined downlink signal, the base station transmits a 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, the base station transmits the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe containing the unicast part, and/or a transmission duration of the MBSFN subframe containing the newly defined downlink signal, and the duration or the number of symbols of the unicast part in the MBSFN subframe.

The sending period of the unicast subframe sent by the base station is the same as the sending period of the DRS subframe sent by the base station, the sending offset of the unicast subframe sent by the base station is the same as the sending offset of the DRS subframe sent by the base station, and the sending duration of the unicast subframe sent by the base station is the same as the sending duration of the DRS subframe sent by the base station. That is, the DRS subframe is originally configured as a unicast subframe to transmit a downlink signal.

The base station transmits the unicast subframe and/or the unicast part in the MBSFN subframe and/or the transmission period of the MBSFN subframe containing the unicast part is more than 5 milliseconds (ms).

Wherein the measurement configuration information comprises any one or more of:

the measurement period of the UE to 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, the measurement offset of the UE to 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, the measurement duration of the UE to 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 duration or the number of symbols of the unicast part in the MBSFN subframe.

The measurement period of the unicast subframe by the UE is the same as the measurement period of a DRS Measurement Timing Configuration (DMTC) 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 base station transmitting the unicast subframe, and/or the unicast part in the MBSFN subframe, and/or the MBSFN subframe including the unicast part, 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 part in the MBSFN subframe, and/or the MBSFN subframe including the unicast part, and/or the MBSFN subframe including the newly defined downlink signal, may be the same or different; the transmission offset of the base station for transmitting 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 for 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 can 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, which is sent by the base station, may be the same as or different from 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.

Generally, 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 transmitted by the base station is the same as the measurement offset of the UE to 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 transmitted by the base station, the transmission 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 transmitted by the base station is the same as the measurement duration of the UE to 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 transmitted by the base station, of course, nothing prevents this.

MBSFN subframes of a legacy and unicast mixed carrier comprise a unicast part and an MBSFN part, MBSFN subframes of a legacy dedicated carrier do not comprise a unicast part. In the above method, the unicast subframe or the MBSFN subframe including the unicast part is transmitted in a subframe configured in advance, and is used for transmitting a signal for implementing synchronization or a signal for implementing measurement, and the like, the unicast subframe or the MBSFN subframe including the unicast part may be configured to be transmitted periodically or aperiodically, that is, not limited to be configured only in subframe 0 or subframe 5, and other subframes may be configured as MBSFN subframes of a unicast mixed carrier, MBSFN subframes of a dedicated carrier, or unicast subframes, and the like, and how to configure the subframes specifically, the method of the embodiment of the present invention is not limited.

In the above method, no matter whether all downlink subframes in the radio frame are configured as dedicated carrier MBSFN subframes or subframes of other types, or whether part of downlink subframes in the radio frame are configured as dedicated carrier MBSFN subframes or subframes of other types, the unicast subframe or the MBSFN subframe including the unicast part is transmitted in a preconfigured subframe, that is, the subframe in which the unicast subframe or the unicast part is located is not configured as a subframe of other types any more.

For example, all downlink subframes are configured as dedicated carrier MBSFN subframes, including subframe 0, subframe 1, subframe 2, … …. And the unicast subframe or unicast part is configured in the subframe 0, the subframe 40, the subframe 80, … …, and when actually transmitting, the unicast subframe or unicast part is transmitted in the subframe 0, the subframe 40, the subframe 80, … … according to the configured unicast subframe or unicast part, but not according to the configured dedicated carrier MBSFN subframe.

For another example, the transmission period of the unicast subframe or the subframe in which the unicast part is located is 40ms, 80ms, or 160ms, the transmission offset is 0ms to (transmission period-1) ms, and the transmission duration is 1-6 ms.

Here, it is assumed that the transmission cycle of the unicast subframe or the subframe in which the unicast part is located is 40ms, the transmission offset is 0ms, and the transmission duration is 1 ms. Then the base station sends unicast sub-frames or unicast parts on the corresponding sub-frames of 0-1 ms, 40-41 ms, 80-81 ms, … …, as shown in fig. 2.

That is, 0 to 1ms, 40 to 41ms, 80 to 81ms, … … and the corresponding subframes are configured as unicast subframes or MBSFN subframes including unicast parts, and no matter whether all downlink subframes in a radio frame are configured as MBSFN subframes or other types of subframes, as shown in fig. 2 and 3, 0 to 1ms, 40 to 41ms, 80 to 81ms, … … and the corresponding subframes are all used for transmitting unicast subframes or MBSFN subframes including unicast parts.

For the case of subcarrier spacing of 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), unicast subframes are configured to transmit downlink signals or downlink channels.

Especially for a subframe with a long CP (e.g., equal to or greater than 33.33 microseconds (us)), for a case where the subcarrier spacing is not 15kHz (e.g., 7.5kHz or lower), the MBSFN subframe is not suitable for containing a unicast portion (one or more OFDM symbols) to transmit a legacy downlink signal or channel such as CRS, because the subframe structure and symbol length are changed in this case, and the legacy downlink channel or downlink signal is not suitable for being transmitted on the MBSFN subframe. At this time, a dedicated unicast subframe may be configured to transmit a conventional downlink signal or downlink channel.

For the conventional DRS, 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 the unicast subframe or the MBSFN subframe, the DRS can be transmitted on both subframe types. In fact, the related art does not consider how DRSs are transmitted when subcarriers are 7.5kHz or other smaller subcarrier spacing. In addition, when the number of symbols in a subcarrier changes at 15kHz, how DRS is transmitted is not solved. The above scheme can solve this. That is, the DRS is transmitted on the unicast subframe, or the subframe for transmitting the DRS or DMTC is configured as the unicast subframe.

Each cell in the conventional MBSFN area is identified according to the cellThe PSS or SSS is generated (as in 3gpp ts 36.211) and cannot be transmitted over the MBSFN part. Therefore, in the related art, subframes 0 and 5 are not configurable as MBSFN subframes, but may be used to transmit PSS or SSS and measurement signals or control channels. For a single (standby) scenario or a scenario in which subframe 0 or subframe 5 is configured as an MBSFN subframe, the MBSFN cell needs to have downlink synchronization or measurement capability, and the PSS or SSS transmitted by each cell in the MBSFN area or the synchronization area is different.

Alternatively, when a subframe is configured as a unicast subframe, or as an MBSFN subframe that includes a unicast portion, the subframe can no longer be configured as a dedicated MBSFN subframe, and/or as another type of subframe.

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 any more; 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 an MBSFN subframe mixed with unicast for transmitting other signals any more.

Referring to fig. 4, an embodiment of the present invention further provides an apparatus for transmitting a downlink signal and/or a downlink channel, including:

The device of the embodiment of the invention further comprises:

a second sending module, configured to send configuration information of a unicast subframe, and/or configuration information of a unicast part in the MBSFN subframe, and/or configuration information of an MBSFN subframe including a unicast part, and/or configuration information of an MBSFN subframe including a newly defined downlink signal to the UE.

In the apparatus of the embodiment of the present invention, the second sending module is specifically configured to:

It should be noted that the above-mentioned embodiments are only for facilitating the understanding of those skilled in the art, and are not intended to limit the scope of the present invention, and any obvious substitutions, modifications, etc. 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

1. A method for transmitting downlink signals and/or downlink channels, comprising:

2. The method of claim 1, further comprising, prior to the method:

3. The method of claim 2, wherein the base station sends the configuration information to the UE through radio resource control protocol RRC signaling or downlink control signaling DCI.

4. The method according to claim 2, wherein the configuration information comprises transmit configuration information and/or measurement configuration information.

5. The method of claim 4,

6. The method of claim 4, wherein the sending configuration information comprises any one or more of:

7. The method of claim 6, wherein a transmission period for the base station to transmit the unicast subframe is the same as a transmission period for the base station to transmit a discovery signal (DRS) subframe, a transmission offset for the base station to transmit the unicast subframe is the same as a transmission offset for the base station to transmit a DRS subframe, and a transmission duration for the base station to transmit the unicast subframe is the same as a transmission duration for the base station to transmit a DRS subframe.

8. The method of claim 6, wherein the base station transmits the unicast subframe, and/or the unicast portion in the MBSFN subframe, and/or the transmission periodicity of the MBSFN subframe containing the unicast portion is greater than 5 milliseconds (ms).

9. The method of claim 4, wherein the measurement configuration information comprises any one or more of:

10. The method of claim 9, wherein a measurement period of the unicast subframe by the UE is the same as a measurement period of a DMTC subframe configured for DRS measurement timing by the UE, wherein a measurement offset of the unicast subframe by the UE is the same as a measurement offset of a DMTC subframe by the UE, and wherein a measurement duration of the unicast subframe by the UE is the same as a measurement duration of the DMTC subframe by the UE.

11. The method of claim 1 or 2, further comprising, prior to the method:

12. The method of 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 MBSFN subframes of a special carrier and/or MBSFN subframes of a mixed carrier with unicast;

13. The method of claim 1 or 2, wherein the base station transmits any one or more of the following downlink signals or downlink channels in the unicast subframe or the unicast part:

14. The method of claim 13, wherein the signal for synchronization comprises any one or more of:

15. The method of claim 13, wherein the signals for effecting the measurement comprise any one or more of:

16. The method of claim 13, wherein the signal used to implement demodulation comprises: the downlink UE is exclusive to the pilot UE-specific RS.

17. The method of claim 13, wherein the downlink channel comprises any one or more of the following:

18. The method according to claim 1 or 2, wherein the MBSFN subframe containing the newly defined downlink signal is a dedicated carrier MBSFN subframe or an MBSFN subframe mixed with a unicast carrier.

19. The method according to claim 1 or 2, wherein the newly defined downlink signal comprises an MBSFN synchronization signal and/or an MBSFN-DRS.

20. The method of claim 19, 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.

21. The method of claim 20,

22. The method of claim 19, wherein the MBSFN synchronization signal and/or MBSFN-DRS are generated according to an MBSFN area identity.

23. The method of claim 22, wherein the MBSFN-DRS comprises the MBSFN synchronization signal and MBSFN reference signal RS.

24. The method of claim 22, wherein the MBSFN synchronization signals comprise MBSFN Primary Synchronization Signal (PSS) sequences and MBSFN Secondary Synchronization Signal (SSS) sequences, and wherein generating MBSFN synchronization signals according to MBSFN area identities comprises:

where m is a ratio between the number of subcarriers included in one RB and 12.

25. The method of claim 24, wherein the determining parameters for generating MBSFN PSS sequences and parameters for generating MBSFN SSS sequences according to MBSFN area identities comprises:

26. The method of claim 25,

27. The method of claim 24, wherein determining a root factor according to the determined parameters for generating the MBSFN PSS sequence comprises:

28. The method of claim 22, wherein the MBSFN synchronization signal comprises a sequence of MBSFN synchronization signals;

where m is a ratio between the number of subcarriers included in one RB and 12.

29. The method of claim 24 or 28, wherein the interpolating the initial MBSFNPSS/SSS/synchronization signal sequence comprises:

30. The method of claim 24 or 28, wherein interpolating sequences obtained by complementing 50 s before and after an initial MBSFN PSS/SSS/synchronization signal sequence, respectively, comprises:

31. An apparatus for transmitting a downlink signal and/or a downlink channel, comprising:

32. The apparatus of claim 31, further comprising:

33. The apparatus of claim 32, wherein the second sending module is specifically configured to: