WO2014000618A1

WO2014000618A1 - Downlink ue-specific dm-rs transmission method, ue and network-side device

Info

Publication number: WO2014000618A1
Application number: PCT/CN2013/077842
Authority: WO
Inventors: 高雪娟; 丁昱
Original assignee: 电信科学技术研究院
Priority date: 2012-06-26
Filing date: 2013-06-25
Publication date: 2014-01-03
Also published as: CN103517345B; CN103517345A

Abstract

Disclosed are a downlink UE-specific DM-RS transmission method, UE and a network-side device. The method comprises: according to a pre-appointment of the UE and the network side, or according to configuration information sent by the network side, determining a DM-RS resource mapping manner used by a downlink channel, the DM-RS resource mapping manner comprising a first class DM-RS resource mapping manner and a second class DM-RS resource mapping manner, the first class DM-RS resource mapping manner being a DM-RS resource mapping manner defined in a long term evolution-advanced (LTE-A) Rel-10 system, the second class DM-RS resource mapping manner being a mapping manner having reduced DM-RS occupied resources relative to the first class DM-RS resource mapping manner; and in a transmission resource of the downlink channel, acquiring DM-RS information according to the determined DM-RS resource mapping manner. The present invention can reduce the DM-RS transmission overheads, and improve the throughput.

Description

Downlink user-specific DM-RS transmission method and UE and network side device This application claims to be submitted to the Chinese Patent Office on June 26, 2012, the application number is 201210216400.7, and the invention name is

The priority of the Chinese Patent Application for the "Down User-Specific DM-RS Transmission Method and the UE and the Network Side Device" is incorporated herein by reference. The present invention relates to the field of wireless communication technologies, and in particular, to a downlink user-specific DM-RS transmission method, a UE, and a network side device. BACKGROUND OF THE INVENTION 1) Introduction of CA in LTE-A

In order to meet the peak rate requirement in the LTE-A (Long Term Evolution-Advance) system, Carrier Aggregation (CA) technology is introduced, that is, multiple consecutive or discontinuous ones under the same base station e B The carriers are aggregated together and serve the UE at the same time, as shown in Figure 1. These aggregated carriers are also called component carriers (CC). The carrier used by each cell (Cell) can be a member carrier. To ensure backward compatibility with LTE systems, each component carrier does not exceed 20 MHz.

2) Introduction to DM-RS in LTE-A system

There are nine downlink transmission modes defined in the LTE-A system, and the specific downlink transmission mode of the UE is pre-configured by higher layer signaling. The UE-specific DeModulation Reference Signal (DM-RS) is used for signal demodulation in transmission mode 7~9, and can support 1~8 antenna port transmissions, respectively configured in the antenna port Ρ = ⁵ , Ρ ^{= Ί} , Ρ ⁼ or Ρ = 7, 8, ..., υ + 6 , where υ is the number of layers (Layer) transmitted by the pDSCH (Physical Downlink Shared Channel).

The DM-RS is transmitted only on the PRB (Physical Resource Block) transmitted in the transmission mode 7~9 to reduce the reference symbol overhead, save energy, and reduce the interference between adjacent cells. 2a to 2c are resource mapping modes of a PRB (Physical Resource Block) in a time slot of a DM-RS in a sub-frame, and the time domain is horizontally represented in FIG. 2a to FIG. 2c. The resource is in units of OFDM (Orthogonal Frequency Division Multiplexing) symbols, where 1 is an OFDM symbol number in a different slot in one subframe, and a longitudinal direction represents a frequency domain resource, in units of subcarriers, k For subcarrier numbers, each cell identified by a 1 and k number represents an RE (Resource Element), where, for the same subframe, the DM-RS is at antenna port 7/8/1 1/13 The mapping positions on the same are the same, and the mapping positions on the antenna ports 9/10/12/14 are the same. Through Tables 1 and 2 Under CP, DM-RS does not support transmission on antenna ports 9~14.

In the Rel-10 system, in the DM-RS and the PBCH (Physical Broadcast Channel) data or the synchronization signal, there are PRBs in which resources overlap in the same subframe (for example, 6 PRBs in the middle of the cell band), DM- The RS does not transmit, so the PDSCH in these PRBs cannot be demodulated based on DM-RS, but can be based on CRS.

(Cell-specific Reference Signal) Demodulation.

Table 1: DM-RS orthogonal sequences for different antenna ports under conventional CP

Table 2: DM-RS Orthogonal Sequences for Different Antenna Ports Under Extended CP

3) Introduction to extended carriers in LTE-A systems

In order to further improve system resource utilization, LTE-A Rel-11 determines to introduce a new carrier type (NBC) for the CA system to enhance system frequency usage and better support heterogeneous networks. Reduce power consumption.

The specific working mode of the NCT is as follows: Reduce the CRS overhead, only support CRS transmission on the antenna port 0 with a period of 5ms, and the CRS is only used for tracking and measurement; 增强Enhanced physical downlink control channel (E-PDCCH, Enhanced Physical Downlink Control) CHannel) scheduling PDSCH transmission; downlink data (including E-PDCCH, PDSCH) are based on DM-RS demodulation, and only supports transmission mode 9; in Rel-11, NCT cannot work independently, and needs to be combined with a legacy carrier Aggregation work; There is a certain deviation according to whether the NCT of the receiving end and the legacy carrier are synchronized in the time domain and the frequency domain, including synchronous and asynchronous NCT; the synchronous signal needs to be transmitted on the asynchronous NCT, and the time-frequency domain resource of the synchronous signal transmission The resources of the downlink reference signals, such as the CRS, the DM-RS, and the CSI-RS (Channel State Information Reference Signal), do not overlap, so as to improve the downlink transmission efficiency of the NCT; In Rel-12 and later, NCT may support independent work.

4) Introduction to LTE-Hi

Scenes such as indoor/hotspots have features for low-speed mobile terminals, small multipath delay spread, and small coverage radius. Small cell or local cell deployed as a scenario such as Indoor/hotspot. The local cell can work independently or in conjunction with a macro cell macro cell.

In order to meet the rapidly growing data traffic demand in the Indoor/hotspot scenario, further research on LTE-Hi (LTE for Hotspot and Indoor) was proposed. Based on LTE and LTE-A systems, LTE-Hi can extend bandwidth, such as using higher bandwidth band resources in high frequency bands, or adopt new physical layer transmission technologies such as NCT, Dynamic Time Division Duplex (Dynamic TDD) , Dynamic Time Division Duplex technology, 256 Quadrature Amplitude Modulation (QAM) achieves higher spectral efficiency and throughput.

The NCT is more suitable for network deployments such as Indoor/hotspot because of the reduced reference symbols and control channel overhead of the legacy carrier, better support for heterogeneous networks, and lower power consumption. In addition, the NCT is distinguished from legacy. The new carrier type of the carrier can further introduce a design scheme that reduces overhead and improves spectrum efficiency. Dynamic TDD technology can dynamically configure the transmission direction of some sub-frames in order to better adapt to the indoor/hotspot scenarios where the uplink/downlink traffic is asymmetric.

The UEs in the indoor/hotspot scenario are mostly in a low-speed state, and the channel correlation between multiple OFDM symbols and adjacent subframes in one subframe is high, and the DM can be considered without affecting the demodulation performance of the UE. -RS resource overhead in the time domain, improve throughput; Similarly, when the frequency domain channel correlation of the frequency band used by the scene such as Indoor/hotspot is also high, the resource overhead of the DM-RS in the frequency domain can be reduced, and the resource overhead can be improved. Throughput. However, there is currently no reduced overhead DM-RS transmission method based on the characteristics of the Indoor/hotspot scenario. SUMMARY OF THE INVENTION The present invention provides a downlink user-specific DM-RS transmission method and a UE and a network side device, which are used to reduce DM-RS transmission overhead and improve throughput of an Indoor/hotspot scenario.

The present invention provides a downlink user-specific demodulation reference signal DM-RS transmission method, including:

Determining a DM-RS resource mapping manner for the downlink channel according to the pre-arrangement of the user equipment UE and the network side, or according to the configuration information sent by the network side, where the DM-RS resource mapping manner includes the first type of DM-RS resource mapping And a second type of DM-RS resource mapping mode, where the first type of DM-RS resource mapping mode is a DM-RS resource mapping mode defined in a long-term evolution enhanced LTE-A Rel-10 system, and the second type of DM - the RS resource mapping mode is a mapping mode in which the DM-RS occupies a resource reduction with respect to the first DM-RS resource mapping mode;

The DM-RS information is obtained according to the determined DM-RS resource mapping manner in the transmission resource of the downlink channel. The present invention further provides a downlink user-specific demodulation reference signal DM-RS transmission method, including: determining a DM-RS resource mapping manner for a downlink channel, where the DM-RS resource mapping manner includes a first type of DM-RS resource a mapping mode and a second type of DM-RS resource mapping mode, where the first type of DM-RS resource mapping mode is a DM-RS resource mapping mode defined in a long-term evolution enhanced LTE-A Rel-10 system, and the second type The DM-RS resource mapping mode is a mapping mode in which the DM-RS occupies a resource reduction relationship with respect to the first DM-RS resource mapping mode;

In the transmission resources of the downlink channel, DM-RS resource mapping and transmission are performed according to the determined DM-RS resource mapping manner.

The present invention also provides a user equipment UE, including:

a determining unit, configured to determine, according to the pre-arrangement of the UE and the network side, or according to the configuration information sent by the network side, the DM-RS resource mapping manner used by the downlink channel, where the DM-RS resource mapping manner includes the first type The DM-RS resource mapping mode and the second DM-RS resource mapping mode are the DM-RS resource mapping modes defined in the LTE-A Rel-10 system. The second type of DM-RS resource mapping mode is a mapping mode in which the DM-RS resource consumption is reduced relative to the first type DM-RS resource mapping mode;

And an acquiring unit, configured to acquire, according to the determined DM-RS resource mapping manner, DM-RS information in a transmission resource of the downlink channel.

The invention also provides a network side device, comprising:

a determining unit, configured to determine a DM-RS resource mapping manner for the downlink channel, where the DM-RS resource mapping manner includes a first type DM-RS resource mapping manner and a second type DM-RS resource mapping manner, where A DM-RS resource mapping manner is a DM-RS resource mapping manner defined in the LTE-A Rel-10 system, and the second DM-RS resource mapping manner is relative to the first DM- RS resource mapping mode DM-RS takes up the mapping method of resource reduction;

And a transmitting unit, configured to perform DM-RS resource mapping and transmission according to the determined DM-RS resource mapping manner in the transmission resource of the downlink channel.

The downlink user-specific DM-RS transmission method and the UE and the network side device provided by the present invention have the following beneficial effects: The downlink user-specific DM-RS transmission method and the UE and the network side device provided by the present invention are applied to the Indoor/hotspot scenario. When it is possible, the DM-RS transmission overhead can be reduced and the throughput can be improved. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of carrier aggregation in an existing LTE-A system;

2a is a DM-RS resource mapping diagram on antenna ports 7 and 8 in a conventional conventional CP;

2b is a DM-RS resource mapping diagram on antenna ports 9 and 10 in a conventional conventional CP;

2c is a DM-RS resource mapping diagram on antenna ports 7 and 8 under the existing extended CP; 3 is a flowchart of a method for transmitting DM-RS dedicated to a downlink user in a network according to an embodiment of the present invention;

4 is a flowchart of a terminal-side downlink user-specific DM-RS transmission method according to an embodiment of the present invention;

5a is a schematic diagram of a time domain truncated DM-RS resource mapping manner of a conventional downlink subframe in a conventional CP according to an embodiment of the present invention;

FIG. 5b is a schematic diagram of a time domain truncated DM-RS resource mapping manner of a conventional downlink subframe in an extended CP according to an embodiment of the present invention; FIG.

6a is a schematic diagram of a time domain truncation DM-RS resource mapping manner of a conventional downlink subframe in a conventional CP according to an embodiment of the present invention;

6b is a schematic diagram of a time domain truncated DM-RS resource mapping manner of a conventional downlink subframe in an extended CP according to an embodiment of the present invention;

7a and 7b are schematic diagrams showing a time domain truncation DM-RS resource mapping manner of a TDD special subframe in a conventional CP according to an embodiment of the present invention;

8a, 8b, 8c, and 8d are schematic diagrams of a frequency domain truncated DM-RS resource mapping manner of a conventional downlink subframe in an extended CP according to an embodiment of the present invention;

FIG. 9 is a structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 10 is a structural diagram of a network side device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The downlink user-specific DM-RS transmission method and the UE and network side devices provided by the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

In the existing mobile communication systems, about 70% of mobile data services come from indoors or hotspots. In the next few years, Indoor/hotspot services will account for 90% of the total mobile data services. In order to accommodate the rapidly growing demand for data traffic in these scenarios, further research is needed to improve spectrum efficiency and throughput.

The UEs in the indoor/hotspot scenario are mostly in a low-speed state, and the channel correlation between multiple orthogonal frequency division multiplexing OFDM symbols in one subframe and between adjacent subframes is high, which can affect the demodulation performance of the UE. Under the premise, the resource overhead of the DM-RS in the time domain is reduced, and the throughput is improved. Similarly, when the frequency domain channel correlation of the frequency band used by the scene such as Indoor/hotspot is also high, the DM-RS can be reduced in the frequency domain. Resource overhead, improve throughput. There is currently no low-overhead DM-RS transmission method based on the characteristics of the Indoor/hotspot scenario.

The present invention provides a DM-RS transmission method to reduce the system overhead of the Indoor/hotspot scenario and improve the throughput. In the following description, the implementation of the cooperation between the network side and the terminal side is described, but this is not This means that the two must be implemented together. In fact, when the network side and the terminal side are implemented separately, the problems existing on the network side and the terminal side are also solved, but when the two are combined, better technical effects are obtained. . As shown in FIG. 3, for the network side, the downlink user-specific demodulation reference signal DM-RS transmission method includes: Step 301: Determine a DM-RS resource mapping manner for the downlink channel, where the DM-RS resource mapping manner includes The first type of DM-RS resource mapping mode and the second type of DM-RS resource mapping mode, the first type of DM-RS resource mapping mode is a long-term evolution enhanced DM-RS resource mapping defined in the LTE-A Rel-10 system The DM-RS resource mapping mode of the second type of DM-RS resource mapping mode is reduced relative to the DM-RS resource mapping mode of the first type of DM-RS resource mapping mode. For the downlink channel, the available DM-RS resource mapping mode includes The first type of DM-RS resource mapping mode is the legacy DM-RS resource mapping mode, that is, the resource mapping mode defined for each DM-RS antenna port in the LTE-A Rel-10 system, and the second type of DM-RS. The resource mapping mode reduces the DM-RS transmission overhead relative to the first type of DM-RS resource mapping mode.

Step 302: Perform, according to the determined DM-RS resource mapping manner, a transmission resource of the downlink channel.

DM-RS resource mapping and transmission.

The transmission resources of the downlink channel include the time domain resource and the frequency domain resource occupied by the downlink channel transmission, the time domain resource is the subframe/slot/OFDM symbol occupied by the downlink channel, and the frequency domain resource is the subcarrier/subcarrier occupied by the downlink channel. The physical resource block PRB corresponding to the carrier may further include an E-CCE (Enhanced Control Channel Element) or an E-REG (Enhanced Resource Element Group) for the E-PDCCH.

Preferably, the network side determines the DM-RS resource mapping manner used by the downlink channel, and may use any one of the following methods: In the first mode, the DM-RS resource mapping manner used in the downlink channel is determined according to the transmission condition and/or the transmission requirement. And further comprising: sending, to the user equipment UE, configuration information indicating a DM-RS resource mapping manner;

In the second mode, the DM-RS resource mapping mode used by the downlink channel is determined according to the pre-arrangement of the network side and the user equipment UE, and the configuration information is not required to be sent to the UE.

The network side performs DM-RS resource mapping and transmission according to the determined DM-RS resource mapping manner, and also transmits information demodulated based on the DM-RS. Different downlink channels use the DM-RS resource mapping method used by the downlink channel for resource mapping in the transmission resources of the downlink channel, and map the data information carried by the downlink channel to the transmission resource except the RE occupied by the DM-RS. On the RE.

For the terminal side, as shown in FIG. 4, the downlink user-specific demodulation reference signal DM-RS transmission method includes: Step 401: Determine a downlink channel according to a pre-arrangement of the user equipment UE and the network side, or according to configuration information sent by the network side. The DM-RS resource mapping mode includes the first DM-RS resource mapping mode and the second DM-RS resource mapping mode, and the first DM-RS resource mapping mode The DM-RS resource mapping mode defined in the LTE-A Rel-10 system is enhanced for the long-term evolution, and the second type of DM-RS resource mapping mode is occupied by the DM-RS with respect to the first type of DM-RS resource mapping mode. Mapping method of resource reduction;

Step 402: Obtain, according to the determined DM-RS resource mapping manner, in the transmission resource of the downlink channel.

DM-RS information, thereby demodulating information carried in the downlink channel based on the DM-RS information. The DM-RS resource mapping method that can be used in this embodiment includes two types, and the first-type DM-RS resource mapping method is not used in the same manner as in the prior art, and the downlink user-specific DM-RS transmission method is applied to a specific scenario. For example, in the case of Indoor/hotspot, the transmission overhead and throughput can be reduced.

When the embodiment of the present invention is applied to the indoor/hotspot scenario, the base station and the UE may work independently in the small cell small cell or the local cell local cell, or cooperate/cooperate with a macro cell macro cell.

For small cells or local cells, you can work in NCT carrier mode.

For the network side, when determining the DM-RS resource mapping mode for the downlink channel, it is preferred to use any of the following methods:

1) determining that all downlink channels of the UE use a first type of DM-RS resource mapping manner or a second type of DM-RS resource mapping manner.

And further comprising: the network side sending configuration information for indicating the determined DM-RS resource mapping manner to the UE.

Specifically, when all downlink channels of the UE meet the transmission conditions and/or transmission requirements, it is determined that all downlink channels use the second type of DM-RS resource mapping manner; otherwise, all downlink channels are determined to use the first type. DM-RS resource mapping mode, and transmitting configuration information indicating the determined DM-RS resource mapping manner to the UE, for example, the "0" and "1" states of the 1-bit information in the configuration information respectively indicate the first class, The second type of DM-RS resource mapping method.

Correspondingly, for the UE side, the UE determines, according to the configuration information, that all downlink channels of the UE use the DM-RS resource mapping manner.

2) determining, for each downlink channel, the first type of DM-RS resource mapping manner or the second type of DM-RS resource mapping manner, or determining that the downlink channel meets a conditional subframe and/or Or one of the DM-RS resource mapping modes of the two types of DM-RS resource mapping modes used in the physical resource block PRB, otherwise, another type of DM-RS resource mapping mode is used; the subframes satisfying the condition and The PRB is determined by the network side and is notified to the UE by configuration information corresponding to the downlink channel in the configuration information, or is determined according to a pre-convention of the network side and the UE.

Then, the network side sends configuration information to the UE, where the configuration information includes configuration information of a DM-RS resource mapping manner that independently indicates different downlink channels.

Specifically, for each downlink channel, when the downlink channel satisfies the transmission condition and/or the transmission requirement, it is determined that the downlink channel uses the second type DM-RS resource mapping manner; otherwise, the first type DM-RS resource mapping is used. And sending, to the UE, configuration information indicating a DM-RS resource mapping manner, where the configuration information includes configuration information indicating a DM-RS resource mapping manner for different downlink channel usage; for example, the configuration information includes each The 1-bit configuration information of the downlink channel, the "0" and "1" states of the 1-bit information respectively indicate that the downlink channel uses the first type or the second type of DM-RS resource mapping manner; for example, assume that the UE has an E - PDCCH, PBCH, PDSCH 3 channels, each of the 3 bits of information indicates the DM-RS resource mapping mode of each channel or, for example, a convention of "0" 第一Use the first type of DM-RS resource mapping method, "1" to indicate the second type of DM-RS resource mapping mode, configuration information

"0 0 1" may indicate that the E-PDCCH uses the first type of DM-RS resource mapping mode, the PBCH uses the first type of DM-RS resource mapping mode, and the PDSCH uses the second type of DM-RS resource mapping mode; or

Different downlink channels may use different DM-RS resource mapping modes under different conditions, that is, Case 1: When one downlink channel satisfies transmission conditions and/or transmission requirements, it is determined that the downlink channel is in any transmission subframe. The second type of DM-RS resource mapping is used, otherwise, the first type of DM-RS resource mapping is used; Case 2: When a downlink channel satisfies transmission conditions and/or transmission requirements in a specific subframe and/or PRB Determining that the downlink channel uses the second type of DM-RS resource mapping manner in the specific subframe and/or the PRB. Otherwise, the first type of DM-RS resource mapping manner is used, and the DM-RS resource mapping is sent to the UE. Configuration information of the mode, where the configuration information includes configuration information indicating a DM-RS resource mapping manner for different downlink channels; for example, for the downlink channel in case 1, the configuration information includes a 1-bit configuration of each downlink channel. Information, using the "0" and "1" states of the 1-bit information to indicate that the downlink channel uses the first type or the second type of DM-RS resource mapping manner, The downlink channel in 2, the configuration information includes A bit configuration information of each downlink channel, where the A bit information is used to indicate a specific subframe and/or a PRB resource, for example, directly indicating a specific subframe number and/or a PRB number, or The A bit information indicates information for determining a specific subframe and/or a PRB resource, for example, indicating one subframe period S and one subframe offset offset, and determining that the subframe number n is satisfied

(n-offset) The subframe with modS=0 is a specific subframe, indicating a PRB set, which is one of a plurality of PRB sets predefined by the system; the specific subframe and/or PRB indicated by the A bit information. The DM-RS resource mapping manner used in the resource may be pre-agreed, for example, pre-agreed using the second type DM-RS resource mapping manner, or

The A bit information includes 1-bit information for indicating that the specific subframe and/or PRB resource uses the first type or the second type of DM-RS resource mapping manner.

Correspondingly, for the UE side, the UE determines, according to the configuration information corresponding to each downlink channel, that the downlink channel uses the first type DM-RS resource mapping manner or the second type DM-RS resource mapping manner, or determines the The downlink channel uses one of the DM-RS resource mapping modes of the two types of DM-RS resource mapping modes in the sub-frame and/or the PRB that meet the condition. Otherwise, another type of DM-RS resource mapping mode is used. The subframe and/or the PRB that meet the condition are determined according to configuration information corresponding to the downlink channel in the configuration information or according to a pre-agreed agreement between the UE and the network side.

3) determining that the physical downlink shared channel PDSCH uses the first type of DM-RS resource mapping manner or the second type of DM-RS resource mapping manner; or, determining that the PDSCH uses the above two types in the subframe and/or PRB that satisfy the condition One type of DM-RS resource mapping mode of the DM-RS resource mapping mode, otherwise, another type of DM-RS resource mapping mode is used, and the sub-frame and/or PRB satisfying the condition is determined by the network side and passed through the The configuration information is notified to the UE or determined according to a pre-agreement of the network side and the UE.

And further comprising: the network side sending configuration information to the UE, where the configuration information only indicates that the PDSCH is used

DM-RS resource mapping method.

Specifically, for the PDSCH, when the transmission condition and/or transmission requirement are met, it is determined that the PDSCH uses the second type. DM-RS resource mapping mode, otherwise, the first type of DM-RS resource mapping mode is used, and the configuration information for indicating the DM-RS resource mapping mode is sent to the UE, where the configuration information includes the DM-RS resource mapping indicating the PDSCH. The configuration information of the mode; for example, the "0" and "1" states of the 1-bit information in the configuration information respectively indicate that the PDSCH uses the first type or the second type of DM-RS resource mapping manner; or

For the PDSCH, when the transmission conditions and/or transmission requirements are met in a specific subframe and/or PRB, it is determined that the PDSCH uses the second type of DM-RS resource mapping manner in a specific subframe and/or PRB, otherwise, A type of DM-RS resource mapping mode, and sending configuration information indicating a DM-RS resource mapping manner to the UE; for example, the A-bit configuration information in the configuration information indicates a specific subframe and/or a PRB resource, for example, directly indicating a specific Subframe number and/or PRB number, or, A bit information indicates information for determining a specific subframe and/or PRB resource, for example, indicating one subframe period S and one subframe offset offset, determining subframe number n A subframe that satisfies (n-offset) modS=0 is a specific subframe, indicating a PRB set, which is one of a plurality of preset PRB sets defined by the system; the specific subframe and/or the A subframe information indicates a specific subframe and/or The DM-RS resource mapping manner used in the PRB resource may be pre-agreed, for example, pre-agreed using the second type DM-RS resource mapping manner, or including 1-bit information in the A bit information. Indicating the specific sub-frame and / or the PRB using the first resource class or a second class of DM-RS resource mapping mode.

Correspondingly, for the UE side, the UE determines, according to the configuration information corresponding to the PDSCH, the first DM-RS resource mapping mode or the second DM-RS resource mapping mode of the PDSCH; or, determines that the PDSCH meets the conditional subframe and And/or one of the DM-RS resource mapping modes of the two types of DM-RS resource mapping modes used in the PRB, otherwise, another type of DM-RS resource mapping mode is used, and the sub-frame and/or conditional conditions are met. The PRB is determined according to the configuration information or according to a pre-agreed agreement between the UE and the network side.

For mode 1, the network side passes the physical downlink control channel PDCCH signaling and enhances the physical downlink control channel.

At least one of E-PDCCH signaling, medium access control MAC signaling, and radio resource control RRC signaling sends the configuration information to the UE. Correspondingly, the UE receives the configuration information by using at least one of PDCCH signaling, E-PDCCH signaling, media access control MAC signaling, and radio resource control RRC signaling.

For the second mode, the network side and the user equipment UE pre-agreed the same DM-RS resource mapping manner, and the network side and the UE determine the DM-RS resource mapping manner for the downlink channel, and specifically, any one or any of the following may be used. a combination of certain ways:

1) determining that the E-PDCCH uses the first type of DM-RS resource mapping manner;

2) determining the physical broadcast channel PBCH (if there is a PBCH in the cell deployed as an independently working NCT), using the first type of DM-RS resource mapping manner;

3) Determining that the PDSCH uses the second type of DM-RS resource mapping manner in all the transmission subframes of the PDSCH, or uses the above two types of DMs in the transmission subframe and/or PRB that meet the set conditions. - One type of DM-RS resource mapping mode of the RS resource mapping mode. Otherwise, another type of DM-RS resource mapping mode is used.

Wherein 3) determining that the PDSCH is in the transmission subframe and/or PRB satisfying the set condition, and using the above two types One type of DM-RS resource mapping mode of the DM-RS resource mapping mode. Otherwise, another type of DM-RS resource mapping mode is used. Specifically, any one or any combination of the following may be used:

1 Determining that the PDSCH uses the second type of DM-RS resource mapping mode in the transmission subframe where the subframe number n satisfies (n-offsetl) modSl=0, and uses the first type of DM in the other transmission subframes of the PDSCH. -RS resource mapping mode;

Or, determining that the PDSCH is in the transmission subframe in which the subframe number n satisfies (n-offsetl) modSl=0, and uses the first class.

In the DM-RS resource mapping mode, the PDSCH uses the second type of DM-RS resource mapping mode in other transmission subframes. The S1 pre-agreed or the high-level signaling configuration period value, offsetl is pre-agreed or high-level signaling configuration. Subframe number offset value.

2 Determining that the PDSCH uses the first type of DM-RS resource mapping mode in the time division duplex TDD special subframe, and the PDSCH uses the second type DM-RS resource mapping mode in other transmission subframes;

Alternatively, it is determined that the PDSCH uses the first type of DM-RS resource mapping manner in the TDD special subframe using the regular cyclic prefix CP, and the PDSCH uses the second type DM-RS resource mapping manner in other transmission subframes;

Alternatively, it is determined that the PDSCH uses the first type of DM-RS resource mapping manner in the TDD special subframe using the extended CP, and the PDSCH uses the second type DM-RS resource mapping manner in other transmission subframes.

3 Determining that the PDSCH uses the first class in the PDSCH transmission subframe including the PBCH and/or the synchronization signal transmission.

In the DM-RS resource mapping mode, the PDSCH uses the second type of DM-RS resource mapping mode in other transmission subframes; or determines that the PDSCH is transmitted in the PDSCH transmission subframe including the PBCH and/or the synchronization signal transmission only in the PDSCH transmission. In the PRB of the PRB set in which the PBCH and/or the synchronization signal is transmitted, the first type of DM-RS resource mapping mode is adopted, and the PDSCH does not include the PBCH and/or the synchronization in the remaining PRBs in the PRB set in which the PDB is transmitted. In the PDSCH transmission subframe of the signal transmission, the second type of DM-RS resource mapping manner is used; or

Determining the PDSCH in the PDSCH transmission subframe including the PBCH and/or the synchronization signal transmission, when the PRB set in which the PDSCH transmission is located includes the PRB where the PBCH and/or the synchronization signal transmission is located, the first type of DM-RS resource mapping manner is adopted. The PRB set in which the PDSCH transmission is located does not include the PRB in which the PBCH and/or the synchronization signal is transmitted, or in the PDSCH transmission subframe that does not include the PBCH and/or the synchronization signal transmission, and uses the second type of DM-RS resource mapping manner. (ie, the DM-RS resource mapping method is used on all PRBs in the PRB set where the PDSCH transmission is located).

4: Determining the PDSCH in the retransmission subframe of the PDSCH, using the first type of DM-RS resource mapping manner, and using the second type of DM-RS resource mapping manner in the initial transmission subframe of the PDSCH.

4) Determining that the PDSCH uses the first type of DM-RS resource mapping mode in the PDSCH transmission subframe on the macro cell.

Specifically, the four modes of the above manners 1) to 4) and the multiple sub-modes of each of the modes may be independently operated; or may be combined in any combination, that is, one of the plurality of modes and sub-modes may be used. - the conditional combination of the RS resource mapping method, and the PDSCH that satisfies the combination condition (that is, the condition in any one of the multiple modes and sub-methods of the combination) is used to determine the DM-RS resource mapping manner. Otherwise, Another type of DM-RS resource mapping Specific; may include but is not limited to the following:

Determining a PDSCH transmitted in a subframe in which subframe number n satisfies (n-offsetl) modSl = 0, and/or, in a time division duplex TDD special subframe (or a specific special subframe, for example, using a special CP) a subframe, a PDSCH transmitted in a special subframe using an extended CP, or a special subframe with a specific special subframe configuration, and/or a PDSCH transmitted in a subframe containing PBCH and/or synchronization signal transmission And/or, the retransmitted PDSCH, and/or the PDSCH transmitted on the macro cell, using the first type of DM-RS resource mapping mode, and in other cases, the second type of DM-RS resource mapping mode; Or,

Determining a PDSCH transmitted in a transmission subframe in which the subframe number n satisfies (n-offsetl) modS1 = 0, and/or, in a time division duplex TDD special subframe (or a specific special subframe, for example, using a conventional CP a special subframe, or a special subframe using an extended CP, or a PDSCH transmitted in a special subframe having a specific special subframe configuration, and/or a PBCH and/or a synchronization signal in a PRB set in which the PDSCH transmission is located In the part of the transmitted PRB, and/or the retransmitted PDSCH, and/or the PDSCH transmitted on the macro cell, the first type of DM-RS resource mapping is used, and in other cases, the second type of DM is used. RS resource mapping mode; or,

Determining a PDSCH transmitted in a transmission subframe in which the subframe number n satisfies (n-offsetl) modS1 = 0, and/or, in a time division duplex TDD special subframe (or a specific special subframe, for example, using a conventional CP a special subframe, or a special subframe using an extended CP, or a PDSCH transmitted in a special subframe having a specific special subframe configuration, and/or a PBCH and/or a synchronization signal in a PRB set in which the PDSCH transmission is located The transmitted PDSCH, and/or the retransmitted PDSCH, and/or the PDSCH transmitted on the macro cell, use the first type of DM-RS resource mapping mode, and in other cases, the second type of DM-RS resource Mapping method; or,

Determining a PDSCH transmitted in a transmission subframe in which the subframe number n does not satisfy (n-offsetl) modS1 = 0, and/or, in a time division duplex TDD special subframe (or a specific special subframe, for example, using a regular CP) a special subframe, or a special subframe that uses an extended CP, or a PDSCH transmitted in a special subframe with a specific special subframe configuration, and/or, transmitted in a subframe containing PBCH and/or synchronization signal transmission PDSCH, and/or, retransmitted PDSCH, and/or PDSCH transmitted on the macro cell, using the first type of DM-RS resource mapping, and in other cases, using the second type of DM-RS resource mapping Way; or,

Determining a PDSCH transmitted in a transmission subframe in which the subframe number n does not satisfy (n-offsetl) modS1 = 0, and/or, in a time division duplex TDD special subframe (or a specific special subframe, for example, using a regular CP) a special subframe, or a special subframe that uses an extended CP, or a PDSCH transmitted in a special subframe with a specific special subframe configuration, and/or a PBCH and/or a synchronization in the PRB set in which the PDSCH transmission is located In the partial PRB of the signal transmission, and/or the retransmitted PDSCH, and/or the PDSCH transmitted on the macro cell, the first type of DM-RS resource mapping is used, and in other cases, the second type of DM is used. -RS resource mapping method; or,

Determining a PDSCH transmitted in a transmission subframe in which the subframe number n does not satisfy (n-offsetl) modS1 = 0, and/or, in a time division duplex TDD special subframe (or a specific special subframe, for example, using a regular CP) Special sub-frame, or use a PDSCH transmitted in a special subframe of an extended CP, or a special subframe having a specific special subframe configuration, and/or a PDSCH including a PBCH and/or a synchronization signal transmission in a PRB set in which the PDSCH transmission is located, and/or Or, the retransmitted PDSCH, and/or the PDSCH transmitted on the macro cell, adopts the first type of DM-RS resource mapping manner, and in other cases, the second type DM-RS resource mapping manner;

In the above various combinations, the S1 pre-agreed or the high-level signaling configuration is a period value, and the offset1 is a pre-agreed or high-level signaling configured sub-frame number offset value.

Further explanation, the following conditions can be defined:

Condition 1: The PDSCH transmitted in the transmission subframe in which the subframe number n does not satisfy (n-offsetl) modSl=0; or, Condition 1: The carrier that does not satisfy (n-offsetl) modSl=0 in the subframe number n PDSCH transmitted in the frame;

Condition 2: PDSCH transmitted in a time division duplex TDD special subframe; or,

Condition 2: PDSCH transmitted in a specific time division duplex TDD special subframe (for example, a special subframe under a regular CP, or a special subframe under an extended CP, or a special subframe with a specific configuration); or,

Condition 3: PDSCH transmitted in a subframe containing PBCH and/or synchronization signal transmission; or,

Condition 3: In the PRB set where the PDSCH transmission is located, the part of the PRB that contains the PBCH and/or the synchronization signal transmission; or,

Condition 3: PSCH and/or PDSCH transmitted by the synchronization signal are included in the PRB set in which the PDSCH transmission is located; Condition 4: Retransmitted PDSCH;

Condition 5: PDSCH in the macro cell;

Determining a partial PRB in the PDSCH or PDSCH that satisfies the above-mentioned at least one condition, using the first type of DM-RS resource mapping manner, and in other cases, using the second type of DM-RS resource mapping manner; for example:

The PDSCH that satisfies the above condition 1 only uses the first type of DM-RS resource mapping mode, and in other cases, the second type of DM-RS resource mapping mode; or

Only the PDSCH that satisfies the above condition 2 uses the first type of DM-RS resource mapping mode, and in other cases, the second type of DM-RS resource mapping mode; or

Only the PDSCH in the above condition 3 or the partial PRB in the PDSCH is used, and the first type of DM-RS resource mapping is used, and in other cases, the second type of DM-RS resource mapping is used; or

The PDSCH that satisfies the above condition 4 only uses the first type of DM-RS resource mapping mode, and in other cases, the second type of DM-RS resource mapping mode; or

The PDSCH that satisfies the above condition 5 only uses the first type of DM-RS resource mapping mode, and in other cases, the second type of DM-RS resource mapping mode; or

The PDSCH or part of the PRB in the PDSCH that satisfies any of the conditions 1 and 2 above, the first type

DM-RS resource mapping mode, in other cases, the second type of DM-RS resource mapping mode; or

The partial PRB in the PDSCH or PDSCH that satisfies any of the conditions 1 and 3 above, and the first type DM-RS resource mapping mode. In other cases, the second type of DM-RS resource mapping mode is used. Alternatively, the partial PRB in the PDSCH or PDSCH that satisfies any of the conditions 1 and 4 above is used. DM-RS resource mapping mode, in other cases, the second type of DM-RS resource mapping mode; or

A partial PRB in a PDSCH or a PDSCH that satisfies any of the conditions 1 and 5 above, using a first type of DM-RS resource mapping manner, and in other cases, a second type DM-RS resource mapping manner; or ,

a partial PDB in a PDSCH or a PDSCH that satisfies any of the conditions 2 and 3 above, using a first type of DM-RS resource mapping manner, and in other cases, a second type DM-RS resource mapping manner; or ,

a partial PRB in a PDSCH or a PDSCH that satisfies any of the conditions 2 and 4 above, using a first type of DM-RS resource mapping manner, and in other cases, a second type DM-RS resource mapping manner; or ,

a partial PRB in the PDSCH or PDSCH that satisfies any of the conditions 2 and 5 above, using the first type of DM-RS resource mapping mode, and in other cases, the second type of DM-RS resource mapping mode; or ,

The partial PRB in the PDSCH or the PDSCH that satisfies any of the conditions 1, 2, and 2 above is used in the first type of DM-RS resource mapping, and in other cases, the second type of DM-RS resource mapping is used. Alternatively, the partial PRB in the PDSCH or PDSCH that satisfies any of the conditions 1, 2, and 4 above is used in the first type of DM-RS resource mapping mode, and in other cases, the second type of DM is used. -RS resource mapping mode; or a partial PDB in the PDSCH or PDSCH that satisfies any of the conditions 1, 2, and 5 above, using the first type of DM-RS resource mapping, and in other cases, The second type of DM-RS resource mapping mode; or the partial PRB of the PDSCH or PDSCH that satisfies any of the conditions 2, 3, and 4 above, and the first type of DM-RS resource mapping mode, in other cases The second type of DM-RS resource mapping method is used; or the partial PRB in the PDSCH or PDSCH that satisfies any of the conditions 2, 3, and 5 above, and the first type of DM-RS resource mapping method is used. In other cases, the second type of DM-RS resources are used. Or a partial PRB in the PDSCH or PDSCH that satisfies any of the conditions 3, 4, and 5 above, and uses the first type of DM-RS resource mapping method. In other cases, the second type is used. DM-RS resource mapping mode; or a partial PDB in the PDSCH or PDSCH that satisfies any of the conditions 1, 2, 3, and 4, and the first type of DM-RS resource mapping, in other cases The second type of DM-RS resource mapping method is used; or the partial PRB in the PDSCH or the PDSCH that satisfies any of the conditions 1, 2, 2, and 5 above, and the first type of DM-RS is used. In other cases, the second type of DM-RS resource mapping method is used; or the partial PRB in the PDSCH or PDSCH that satisfies any of the conditions 1, condition 3, condition 4, and condition 5 above, The first type of DM-RS resource mapping is used, and in other cases, the second type of DM-RS resource mapping is used; or the PDSCH that satisfies any of the conditions 2, 3, 4, and 5 above Part of the PRB in the PDSCH, using the first type of DM-RS resource mapping In other cases, the second type of DM-RS resource mapping method is used; or, the PDSCH in the condition 1, the condition 2, the condition 3, the condition 4, and the condition 5 is a partial PRB in the PDSCH or the PDSCH, Use the first type of DM-RS resource mapping method. In other cases, use the second type DM-RS resource mapping method. Style.

It should be noted that the above-described satisfying condition X (x=l~5) refers to the condition X) determined by any one of the plurality of definition modes included in the condition X.

It should be noted that, for multiple downlink channels of one UE, different downlink channels may have different methods for determining a DM-RS resource mapping manner. For example, E-PDCCH and PBCH use a pre-agreed method to determine that the first type is always used. In the DM-RS resource mapping mode, the PDSCH may use a pre-agreed method to determine the DM-RS resource mapping manner according to the different preset rule conditions that are met, or may also use the signaling configuration method to determine the DM-RS through the configuration information. Resource mapping method.

In particular, the UE and the network side may also pre-arrange or determine, by the higher layer signaling configuration, that the DM-RS resource mapping is not performed on the transmission subframe that satisfies the set condition for some or all of the downlink channels. For example, pre-arranging or signaling the period value S2 and the subframe number offset value offset2, in the downlink subframe where the subframe number n satisfies (n-offset2) modS2=0, the DM-RS is not transmitted in the PRB where the PDSCH transmission is located, The PDSCH in the subframe may be demodulated according to the DM-RS in the adjacent downlink subframe.

The second type of DM-RS resource mapping mode is a mapping mode of the DM-RS resource consumption reduction mode with respect to the first type of DM-RS resource mapping mode. In this embodiment, the second type of DM-RS resource mapping may be determined by using any of the following methods. the way:

1) Shortened (shortened) DM-RS resource mapping method

The DM-RS is mapped to only part of the DM-RS resources on the corresponding antenna port in the first type of DM-RS resource mapping mode, based on the first type of DM-RS resource mapping manner, and the obtained time domain is / or frequency domain DM-RS resource truncated resource mapping.

Specifically, for the manner of time domain truncation, the part of the DM-RS resource is:

In the first type of DM-RS resource mapping method, the resource unit RE corresponding to the DM-RS on the two adjacent OFDM symbols in the orthogonal frequency division multiplexing OFDM symbol of the DM-RS mapping resource in one subframe. In the first type of DM-RS resource mapping mode, the OFDM of the DM-RS in one subframe includes the RE corresponding to the DM-RS on the four adjacent OFDM symbols. In this embodiment, only two adjacent OFDMs are taken. The RE corresponding to the DM-RS on the symbol.

Specifically, as shown in FIG. 5a and FIG. 5b, only in the OFDM including the DM-RS, the DM-RS is mapped on the RE corresponding to the DM-RS on the first two adjacent OFDM symbols; or, as shown in FIG. 6a, FIG. 6b, FIG. 7a, and FIG. 7b, only in the OFDM including the DM-RS, mapping the DM-RSo on the RE corresponding to the DM-RS on the last two adjacent OFDM symbols, of course, specific The truncation mode is not limited thereto, for example, for a special subframe, on the antenna port 7/8/11/13, only in the OFDM including the DM-RS, the DM-RS on the first two adjacent OFDM symbols Mapping the DM-RS on the corresponding RE, on the antenna port 9/10/12/14, only in the OFDM including the DM-RS, the RE corresponding to the DM-RS on the last two adjacent OFDM symbols Map DM-RS.

For the frequency domain truncation mode, the part of the DM-RS resource is: In the first type of DM-RS resource mapping mode, at least one set of subcarriers with the same number of DM-RS mapping resources in one subframe The RE corresponding to the DM-RS, as shown in the figure 8a to 8b, the partial DM-RS resources are specifically: in the first type of DM-RS resource mapping manner, each subframe includes a DM-RS corresponding to two DM-RSs of the same DM-RS on the subcarriers with the same number k RE.

According to another embodiment of the present invention, the combination of the time domain and the frequency domain truncation may be combined, that is, any combination of the above two modes, and details are not described herein.

2) Newly defined DM-RS resource mapping method. The number of OFDM symbols (instant domain density) including the DM-RS mapping resource in one subframe is smaller than the number of the OFDM symbols in the first type DM-RS resource mapping manner, and/or includes DM- The number of REs corresponding to the DM-RS on the OFDM symbol of the RS mapping resource (ie, the frequency domain density) is smaller than the redefined resource mapping manner of the number of REs in the first type of DM-RS resource mapping manner.

Preferably, the antenna ports of the above-mentioned transmission DM-RS in this embodiment are antenna ports 7-14.

Based on the same inventive concept, a user equipment UE and a network side device are further provided in the embodiment of the present invention. Since the principle of solving the problem of these devices is similar to a downlink user-specific DM-RS transmission method, the implementation of these devices can be seen. The implementation of the method, the repetition will not be repeated.

The user equipment UE provided by the embodiment of the present invention, as shown in FIG. 9, includes:

The determining unit 901 is configured to determine, according to the pre-arrangement of the UE and the network side, or the DM-RS resource mapping manner for the downlink channel, according to the configuration information sent by the network side, where the DM-RS resource mapping manner includes the first The DM-RS resource mapping mode and the second DM-RS resource mapping mode are the DM-RS resource mapping modes defined in the LTE-A Rel-10 system. The second type of DM-RS resource mapping mode is a mapping mode in which the DM-RS resource consumption is reduced relative to the first type DM-RS resource mapping mode;

The obtaining unit 902 is configured to obtain DM-RS information according to the determined DM-RS resource mapping manner in the transmission resource of the downlink channel.

Preferably, the determining unit determines, according to the configuration information sent by the network side, the DM-RS resource mapping manner used by the downlink channel, which specifically includes:

The configuration information indicates a DM-RS resource mapping manner used by the UE, and determining, according to the configuration information, that all downlink channels of the UE use the DM-RS resource mapping manner; or

The configuration information includes configuration information of a DM-RS resource mapping manner for indicating different downlink channels, and determining, according to configuration information corresponding to each downlink channel, the first type of DM-RS resource mapping manner. Or a second type of DM-RS resource mapping manner, or determining that the downlink channel uses one of the two types of DM-RS resource mapping modes in the subframe and/or the physical resource block PRB that meet the condition. The resource mapping mode, otherwise, another type of DM-RS resource mapping mode is used, and the sub-frame and/or PRB that meets the condition is determined or determined according to the configuration information corresponding to the downlink channel in the configuration information. Pre-agreed by the UE and the network side; or

The configuration information only indicates a DM-RS resource mapping manner used by the physical downlink shared channel PDSCH, according to

The configuration information corresponding to the PDSCH determines whether the PDSCH uses the first type of DM-RS resource mapping mode or the second type of DM-RS resource mapping mode, or determines that the PDSCH uses the above two types in the subframe and/or PRB that satisfy the condition. DM-RS resources One of the DM-RS resource mapping modes of the mapping mode, otherwise, another type of DM-RS resource mapping mode is used, and the sub-frame and/or PRB that meet the condition is determined according to the configuration information corresponding to the PDSCH or according to the The UE and the network side pre-agreed to determine.

Preferably, the determining unit uses at least one signaling receiving station in physical downlink control channel PDCCH signaling, enhanced physical downlink control channel E-PDCCH signaling, media access control MAC signaling, and radio resource control RRC signaling. Describe the configuration information.

Preferably, the determining unit determines, according to a pre-agreement between the UE and the network side, a DM-RS resource mapping manner for the downlink channel, specifically:

Determining that the E-PDCCH uses the first type of DM-RS resource mapping manner; and/or,

Determining the physical broadcast channel PBCH uses the first type of DM-RS resource mapping method; and / or,

Determining that the PDSCH uses the second type of DM-RS resource mapping manner in all the transmission subframes of the PDSCH, or uses the above two types of DM-RS resource mapping in the transmission subframe and/or the PRB that meet the setting conditions. One of the DM-RS resource mapping methods of the mode, otherwise, another DM-RS resource mapping mode is used.

Preferably, the determining unit determines that the PDSCH uses one of the two types of DM-RS resource mapping modes of the two types of DM-RS resource mapping modes in the transmission subframe and/or the PRB that meet the set condition, otherwise, another A type of DM-RS resource mapping method includes:

Determining that the PDSCH uses the second type of DM-RS resource mapping mode in the transmission subframe where the subframe number n satisfies (n-offsetl) modSl=0, and uses the first type of DM-RS resource in other transmission subframes. Mapping method; or,

Determining that the PDSCH uses the first type of DM-RS resource mapping mode in the transmission subframe where the subframe number n satisfies (n-offsetl) modSl=0, and uses the second type DM-RS resource mapping manner in other transmission subframes. ;

The S1 is a pre-agreed or high-level signaling configured period value, and the offset1 is a pre-agreed or high-layer signaling configured sub-frame number offset value.

Determining that the PDSCH uses the first type of DM-RS resource mapping mode in the time division duplex TDD special subframe, and uses the second type of DM-RS resource mapping mode in other transmission subframes; or

Determining that the PDSCH uses the first type of DM-RS resource mapping mode in the TDD special subframe using the regular cyclic prefix CP, and uses the second type of DM-RS resource mapping mode in other transmission subframes; or

It is determined that the PDSCH uses the first type of DM-RS resource mapping mode in the TDD special subframe using the extended CP, and uses the second type of DM-RS resource mapping mode in other transmission subframes.

Preferably, the determining unit determines that the PDSCH uses one of the two types of DM-RS resource mapping modes of the two types of DM-RS resource mapping modes in the transmission subframe and/or the PRB that meet the set condition, otherwise, another One type of DM-RS resources The mapping method includes:

Determining that the PDSCH uses the first type of DM-RS resource mapping manner in the PDSCH transmission subframes that include the PBCH and/or the synchronization signal transmission, and uses the second type of DM-RS resource mapping manner in the other PDSCH transmission subframes; or

Determining the PDSCH in the PDSCH transmission subframe including the PBCH and/or the synchronization signal transmission, in the PRB including the PBCH and/or the synchronization signal transmission in the PRB set in which the PDSCH transmission is located, using the first type DM-RS resource mapping manner, In the remaining PRBs in the PRB set or in the PDSCH transmission subframes that do not include the PBCH and/or the synchronization signal transmission, the second type of DM-RS resource mapping manner is used; or

Determining the PDSCH in the PDSCH transmission subframe including the PBCH and/or the synchronization signal transmission, when the PRB set in which the PDSCH transmission is located includes the PRB where the PBCH and/or the synchronization signal transmission is located, the first type of DM-RS resource mapping manner is adopted. When the PRB set does not include the PRB in which the PBCH and/or the synchronization signal is transmitted, or in the PDSCH transmission subframe that does not include the PBCH and/or the synchronization signal transmission, the second type of DM-RS resource mapping manner is used.

Determining that the PDSCH is in the retransmission subframe of the PDSCH, using a first type of DM-RS resource mapping manner,

In the initial subframe of the PDSCH, the second type of DM-RS resource mapping is used.

Preferably, the determining unit determines, according to the pre-arrangement of the user equipment UE and the network side, the mapping manner of the DM-RS resource used by the downlink channel, which specifically includes:

Determining that the PDSCH uses the first type of DM-RS resource mapping manner in the PDSCH transmission subframe on the macro cell. Preferably, the second type of DM-RS resource mapping manner determined by the determining unit is:

The DM-RS is mapped to only part of the DM-RS resources on the corresponding antenna port in the first type of DM-RS resource mapping mode, based on the first type of DM-RS resource mapping manner, and the obtained time domain is / or frequency domain DM-RS resource truncated resource mapping; or

The number of orthogonal frequency division multiplexing OFDM symbols that satisfy the DM-RS mapping resource in one subframe is smaller than the number of the OFDM symbols in the first type DM-RS resource mapping manner, and/or includes DM- The number of resource elements RE corresponding to the DM-RS on the OFDM symbol of the RS mapping resource is smaller than the redefinition resource mapping mode of the number of REs in the first type of DM-RS resource mapping manner.

Preferably, the part of the DM-RS resource is:

In the first type of DM-RS resource mapping manner, an OFDM symbol including a DM-RS mapping resource in one subframe, an RE corresponding to a DM-RS on two adjacent OFDM symbols, and/or one subframe The RE corresponding to the DM-RS on the at least one set of subcarriers with the same number of DM-RS mapping resources is included.

The embodiment of the present invention further provides a network side device, as shown in FIG. 10, including:

a determining unit 101, configured to determine a DM-RS resource mapping manner for downlink channel usage, where the DM-RS resource mapping The method includes a first type of DM-RS resource mapping mode and a second type of DM-RS resource mapping mode, where the first type of DM-RS resource mapping mode is a long-term evolution enhanced DM-RS defined in the LTE-A Rel-10 system. a resource mapping mode, where the second type of DM-RS resource mapping mode is a mapping mode in which the DM-RS resource consumption is reduced relative to the first type DM-RS resource mapping mode;

The transmitting unit 102 is configured to perform DM-RS resource mapping and transmission according to the determined DM-RS resource mapping manner in the transmission resource of the downlink channel.

Preferably, the determining unit determines a DM-RS resource mapping manner for the downlink channel, specifically: determining, according to the transmission condition and/or the transmission requirement, the DM-RS resource mapping manner used by the downlink channel, and the user equipment UE Sending configuration information indicating a DM-RS resource mapping manner; or

The DM-RS resource mapping mode for the downlink channel is determined according to the pre-arrangement of the network side device and the user equipment UE.

Preferably, the determining unit determines a DM-RS resource mapping manner for the downlink channel according to the transmission condition and/or the transmission requirement, and sends configuration information for indicating the DM-RS resource mapping manner to the user equipment UE, specifically including Determining, by using the first type of DM-RS resource mapping mode or the second type of DM-RS resource mapping mode, and transmitting, to the UE, the DM-RS resource mapping manner for indicating the determining Or, for each downlink channel, determining that the downlink channel uses the first type of DM-RS resource mapping mode or the second type of DM-RS resource mapping mode, or determines that the downlink channel meets the condition The DM-RS resource mapping method of the above two types of DM-RS resource mapping modes is adopted in the subframe and/or the physical resource block PRB. Otherwise, another DM-RS resource mapping manner is used, and The UE sends configuration information, where the configuration information includes configuration information indicating a DM-RS resource mapping manner for different downlink channels, and the subframe and/or PRB satisfying the condition is Unit determined by the configuration information, the downlink notification channel configuration information corresponding to the UE or from the network side according to the pre-agreed with the UE determining means; or

Determining the physical downlink shared channel PDSCH by using the first type of DM-RS resource mapping mode or the second type of DM-RS resource mapping mode, or determining that the PDSCH uses the above two types of DMs in the subframe and/or PRB that satisfy the condition. One type of DM-RS resource mapping mode of the RS resource mapping mode. Otherwise, another type of DM-RS resource mapping mode is used, and configuration information is sent to the UE, and the configuration information only indicates the DM- used by the PDSCH. In the RS resource mapping mode, the sub-frame and/or PRB that meet the condition is determined by the determining unit, and is notified to the UE by using the configuration information or determined according to a pre-convention of the network side device and the UE.

Preferably, the determining unit performs at least one of physical downlink control channel PDCCH signaling, enhanced physical downlink control channel E-PDCCH signaling, media access control MAC signaling, and radio resource control RRC signaling. The UE sends the configuration information.

Preferably, the determining unit determines, according to a pre-agreement of the network side device and the user equipment UE, a DM-RS resource mapping manner for the downlink channel, specifically: Determining the E-PDCCH using the first type of DM-RS resource mapping manner; and/or,

Determining that the PDSCH uses the second type of DM-RS resource mapping manner in all the transmission subframes of the PDSCH, or uses the above two types of DM-RSs in the transmission subframe and/or PRB that meet the set conditions. One type of DM-RS resource mapping method in resource mapping mode. Otherwise, another type of DM-RS resource mapping method is used.

Preferably, the determining unit determines, in the transmission subframe and/or the PRB that meets the setting condition, that the PDSCH uses one of the two types of DM-RS resource mapping modes of the foregoing two types of DM-RS resource mapping manners, otherwise, Another type of DM-RS resource mapping method includes:

Determining that the PDSCH uses the first type of DM-RS resource mapping mode in the transmission subframe where the subframe number n satisfies (n-offsetl) modSl=0, and uses the second type of DM-RS resource in other transmission subframes. Mapping method

The S1 pre-agreed or the period value of the high-level signaling configuration, and the offset1 is the subframe number offset value of the pre-agreed or high-layer signaling configuration.

Determining that the PDSCH uses the first type of DM-RS resource mapping mode in the PDSCH transmission subframe including the PBCH and/or the synchronization signal transmission, and uses the second type DM-RS resource mapping manner in the other transmission subframes; or

Determining that the PDSCH is in the PDSCH transmission subframe including the PBCH and/or the synchronization signal transmission, and only uses the first type of DM-RS resource mapping manner in the PRB including the PBCH and/or the synchronization signal transmission in the PRB set in which the PDSCH transmission is located. The second type of DM-RS resource mapping manner is used in the remaining PRBs in the PRB set or in the PDSCH transmission subframes that do not include PBCH and/or synchronization signal transmission; or

Determining that the PDSCH is in a PDSCH transmission subframe containing PBCH and/or synchronization signal transmission, at the PDSCH transmission station When the PRB set includes the PRB in which the PBCH and/or the synchronization signal is transmitted, the first type of DM-RS resource mapping manner is used, when the PRB set does not include the PRB where the PBCH and/or the synchronization signal is transmitted, or In a PDSCH transmission subframe that does not include PBCH and/or synchronization signal transmission, a second type of DM-RS resource mapping scheme is used.

The PDSCH is determined to use the first type of DM-RS resource mapping mode in the retransmission subframe of the PDSCH, and the second type of DM-RS resource mapping mode is used in the initial transmission subframe of the PDSCH.

Preferably, the determining unit determines, according to a pre-agreement of the network side device and the user equipment UE, a DM-RS resource mapping manner for the downlink channel, specifically:

Determining that the PDSCH is in the PDSCH transmission subframe on the macro cell, uses the first type of DM-RS resource mapping manner. Preferably, the mapping manner of the second type of DM-RS resources determined by the determining unit is:

Preferably, the part of the DM-RS resource is:

In the first type of DM-RS resource mapping mode, the DM symbol including the DM-RS mapping resource in one subframe, the RE corresponding to the DM-RS on the two adjacent OFDM symbols, and/or one subframe includes The DM-RS maps the RE corresponding to the DM-RS on the same number of subcarriers of the same number of resources.

The embodiment of the present invention further provides a downlink user-specific demodulation reference signal DM-RS transmission system, including: the user equipment UE and the network side device provided by the foregoing embodiments.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computers are available Program instructions to a processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that instructions executed by a processor of a computer or other programmable data processing device are generated for implementation in a process A device or a plurality of processes and/or block diagrams of a device in a block or a plurality of blocks.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

1. A downlink user-specific demodulation reference signal DM-RS transmission method, characterized by including: determining the DM used for the downlink channel according to a pre-agreement between the user equipment UE and the network side, or according to the configuration information sent by the network side. -RS resource mapping method, the DM-RS resource mapping method includes a first type of DM-RS resource mapping method and a second type of DM-RS resource mapping method, and the first type of DM-RS resource mapping method is long-term evolution enhanced LTE-A

The DM-RS resource mapping method defined in the Rel-10 system, the second type of DM-RS resource mapping method is a mapping method that reduces the resources occupied by DM-RS compared to the first type of DM-RS resource mapping method;

In the transmission resources of the downlink channel, DM-RS information is obtained according to the determined DM-RS resource mapping method.

2. The method according to claim 1, characterized in that, according to the configuration information sent by the network side, determining the DM-RS resource mapping method used in the downlink channel, specifically including:

The configuration information indicates the DM-RS resource mapping method used by the UE, and according to the configuration information, it is determined that all downlink channels of the UE use the indicated DM-RS resource mapping method; or,

The configuration information includes configuration information that independently indicates the DM-RS resource mapping method used by different downlink channels. According to the configuration information corresponding to each downlink channel, it is determined that the downlink channel uses the first type of DM-RS resource mapping method. Or the second type of DM-RS resource mapping method, or determine that the downlink channel adopts one type of DM-RS resource of the two types of DM-RS resource mapping methods in the subframe and/or physical resource block PRB that meets the conditions. Mapping mode, otherwise, another type of DM-RS resource mapping mode is adopted, and the subframe and/or PRB that meets the conditions are determined according to the configuration information corresponding to the downlink channel in the configuration information or according to the UE and Determined in advance by the network side; or,

The configuration information only indicates the DM-RS resource mapping method used by the physical downlink shared channel PDSCH, according to

The configuration information corresponding to PDSCH determines whether PDSCH adopts the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method, or determines that PDSCH adopts two types of DM in subframes and/or PRBs that meet the conditions. - One type of DM-RS resource mapping method among the RS resource mapping methods, otherwise, another type of DM-RS resource mapping method is adopted, and the subframes and/or PRBs that meet the conditions are determined according to the configuration information corresponding to the PDSCH or Determined according to the pre-agreement between the UE and the network side;

According to the pre-agreement between the user equipment UE and the network side, the DM-RS resource mapping method used for the downlink channel is determined, specifically including:

According to the pre-agreement between the user equipment UE and the network side, determine that the E-PDCCH adopts the first type of DM-RS resource mapping method; and/or,

According to the pre-agreement between the user equipment UE and the network side, determine that the physical broadcast channel PBCH adopts the first type DM-RS resource mapping method; and/or,

According to the pre-agreement between the user equipment UE and the network side, it is determined that the PDSCH is in all transmission subframes of the PDSCH Use the second type of DM-RS resource mapping method, or use one of the two types of DM-RS resource mapping methods in the transmission subframe and/or PRB that meets the set conditions, otherwise , adopt another type of DM-RS resource mapping method; and/or,

According to the pre-agreement between the user equipment UE and the network side, it is determined that the PDSCH adopts the first type of DM-RS resource mapping method in the PDSCH transmission subframe on the macro cell.

3. The method according to claim 1 or 2, characterized in that, the UE uses physical downlink control channel PDCCH signaling, enhanced physical downlink control channel E-PDCCH signaling, media access control MAC signaling, and wireless resources. Control at least one signaling in RRC signaling to receive the configuration information.

4. The method of claim 2, wherein it is determined that the PDSCH adopts one of two types of DM-RS resource mapping modes in the transmission subframe and/or PRB that meets the set conditions. method, otherwise, another type of DM-RS resource mapping method is adopted, which specifically includes:

It is determined that PDSCH adopts the second type of DM-RS resource mapping method in the transmission subframe whose subframe number n satisfies (n-offsetl) modSl=0, and adopts the first type of DM-RS resource in other transmission subframes. Mapping method, where S1 is the period value pre-agreed or configured by high-level signaling, offsetl is the subframe number offset value pre-agreed or configured by high-level signaling; or,

It is determined that PDSCH adopts the first type of DM-RS resource mapping method in the transmission subframe whose subframe number n satisfies (n-offsetl) modSl=0, and adopts the second type of DM-RS resource mapping in other transmission subframes. method, where S1 is the period value pre-agreed or configured by high-level signaling, and offset 1 is the subframe number offset value pre-agreed or configured by high-level signaling; Determine that PDSCH is transmitted in subframes and/or PRBs that meet the set conditions One type of DM-RS resource mapping method of the two types of DM-RS resource mapping methods is used. Otherwise, another type of DM-RS resource mapping method is used, which specifically includes: Determining that the PDSCH is in the time division duplex TDD special subframe The first type of DM-RS resource mapping method is adopted, and the second type of DM-RS resource mapping method is used in other transmission subframes; or,

Determine that PDSCH adopts the first type of DM-RS resource mapping method in the TDD special subframe using the conventional cyclic prefix CP, and adopts the second type of DM-RS resource mapping method in other transmission subframes; or,

Determine that PDSCH adopts the first type of DM-RS resource mapping method in TDD special subframes using extended CP, and adopts the second type of DM-RS resource mapping method in other transmission subframes;

Determine that the PDSCH adopts one of the two types of DM-RS resource mapping methods in the transmission subframe and/or PRB that meets the set conditions; otherwise, adopts the other type of DM-RS resource mapping method. , specifically including: determining that PDSCH adopts the first type of DM-RS resource mapping method in PDSCH transmission subframes containing PBCH and/or synchronization signal transmission, and adopts the second type of DM-RS resource mapping in other PDSCH transmission subframes. way; or,

Determine that the PDSCH is in the PDSCH transmission subframe that contains PBCH and/or synchronization signal transmission, and only use the first type of DM-RS resource mapping method in the PRB set that contains PBCH and/or synchronization signal transmission in the PRB set where the PDSCH transmission is located. , the remaining PRBs in the PRB set or the PDSCH transmission subframes that do not include PBCH and/or synchronization signal transmission , adopt the second type of DM-RS resource mapping method; or,

Determine that the PDSCH is in the PDSCH transmission subframe that includes PBCH and/or synchronization signal transmission. When the PRB set where the PDSCH transmission is located includes the PRB where the PBCH and/or synchronization signal transmission is located, the first type of DM-RS resource mapping method is adopted. , when the PRB set does not include the PRB where PBCH and/or synchronization signal transmission is located or in the PDSCH transmission subframe that does not include PBCH and/or synchronization signal transmission, the second type of DM-RS resource mapping method is adopted;

Determine that the PDSCH adopts one of the two types of DM-RS resource mapping methods in the transmission subframe and/or PRB that meets the set conditions; otherwise, adopts the other type of DM-RS resource mapping method. , specifically including: determining that the PDSCH is in the retransmission subframe of the PDSCH, using the first type of DM-RS resource mapping, and in the initial transmission subframe of the PDSCH, using the second type of DM-RS resource mapping Way.

5. The method according to any one of claims 1 to 4, characterized in that the second type DM-RS resource mapping method is:

Based on the first type of DM-RS resource mapping method, only DM-RS is mapped to part of the DM-RS resources on the corresponding antenna port in the first type of DM-RS resource mapping method, and the obtained time domain sum /or a resource mapping method in which frequency domain DM-RS resources are truncated, wherein the part of the DM-RS resources is: In the first type of DM-RS resource mapping method, one subframe contains DM-RS mapping resources In OFDM symbols, REs corresponding to DM-RSs on two adjacent OFDM symbols, and/or, REs corresponding to DM-RSs on at least one group of subcarriers with the same number that contain DM-RS mapping resources in one subframe ; or,

It is satisfied that the number of orthogonal frequency division multiplexing OFDM symbols containing DM-RS mapping resources in one subframe is less than the number of OFDM symbols in the first type of DM-RS resource mapping method, and/or contains DM-RS mapping resources. A redefined resource mapping method in which the number of resource units RE corresponding to the DM-RS on the OFDM symbol of the RS mapping resource is smaller than the number of REs in the first type of DM-RS resource mapping method.

6. A downlink user-specific demodulation reference signal DM-RS transmission method, which is characterized by including:

Determine the DM-RS resource mapping method used in the downlink channel. The DM-RS resource mapping method includes a first type of DM-RS resource mapping method and a second type of DM-RS resource mapping method. The first type of DM-RS resource mapping method is The resource mapping method is the DM-RS resource mapping method defined in the Long Term Evolution Enhanced LTE-A Rel-10 system, and the second type of DM-RS resource mapping method is DM-RS resource mapping method relative to the first type of DM-RS resource mapping. -Mapping method to reduce resource usage of RS;

In the transmission resources of the downlink channel, DM-RS resource mapping and transmission are performed according to the determined DM-RS resource mapping method.

7. The method according to claim 6, wherein the determining the DM-RS resource mapping method used for the downlink channel specifically includes:

According to the transmission conditions and/or transmission requirements, determine the DM-RS resource mapping method used in the downlink channel, and send configuration information indicating the DM-RS resource mapping method to the user equipment UE; or,

According to the pre-agreement between the network side and the user equipment UE, the DM-RS resource mapping method used for the downlink channel is determined.

8. The method according to claim 7, characterized in that: determining the DM-RS resource mapping mode used for the downlink channel according to the transmission conditions and/or transmission requirements, and sending a DM-RS resource mapping method to the user equipment UE to indicate Configuration information of RS resource mapping method, including:

Determine that all downlink channels of the UE adopt the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method, and send a message indicating the determined DM-RS resource mapping method to the UE. Configuration information; or, for each downlink channel, determine that the downlink channel adopts the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method, or, determine that the downlink channel satisfies the conditions. One of the two types of DM-RS resource mapping methods is used in the subframe and/or physical resource block PRB. Otherwise, the other type of DM-RS resource mapping method is used, and the DM-RS resource mapping method is provided to the UE. Send configuration information. The configuration information includes configuration information that independently indicates the DM-RS resource mapping mode used by different downlink channels. The subframes and/or PRBs that meet the conditions are determined by the network side and passed through the configuration information. The configuration information corresponding to the downlink channel is notified to the UE or is determined by a pre-agreement between the network side and the UE; or,

Determine whether the physical downlink shared channel PDSCH adopts the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method, or determines that PDSCH adopts two types of DM-RS in subframes and/or PRBs that meet the conditions. One type of DM-RS resource mapping method among the resource mapping methods. Otherwise, another type of DM-RS resource mapping method is adopted, and configuration information is sent to the UE. The configuration information only indicates the DM-RS used by PDSCH. In the resource mapping mode, the subframes and/or PRBs that meet the conditions are determined by the network side and notified to the UE through the configuration information or determined according to a pre-agreement between the network side and the UE;

According to the pre-agreement between the network side and the user equipment UE, the DM-RS resource mapping method used for the downlink channel is determined, specifically including:

According to the pre-agreement between the network side and the user equipment UE, it is determined that the E-PDCCH adopts the first type of DM-RS resource mapping method; and/or,

According to the pre-agreement between the network side and the user equipment UE, determine that the physical broadcast channel PBCH adopts the first type of DM-RS resource mapping method; and/or,

According to the pre-agreement between the network side and the user equipment UE, it is determined that the PDSCH is used in all transmission subframes of the PDSCH, and the second type DM-RS resource mapping method is adopted, or, in the transmission subframes that meet the set conditions and/or In the PRB, one of the two types of DM-RS resource mapping methods is used, otherwise, the other type of DM-RS resource mapping method is used; and/or,

According to the pre-agreement between the network side and the user equipment UE, it is determined that the PDSCH is in the PDSCH transmission subframe on the macro cell, and the first type of DM-RS resource mapping method is adopted.

9. The method according to claim 7 or 8, characterized in that, through physical downlink control signal PDCCH signaling, enhanced physical downlink control signal E-PDCCH signaling, media access control MAC signaling, radio resource control RRC signaling sending the configuration information to the UE using at least one signaling.

10. The method of claim 8, wherein it is determined that the PDSCH uses one of the two types of DM-RS resource mapping modes in the transmission subframe and/or PRB that meets the set conditions. Mapping method, otherwise, another type of DM-RS resource mapping method is adopted, specifically including:

It is determined that PDSCH adopts the second type of DM-RS resource mapping method in the transmission subframe whose subframe number n satisfies (n-offsetl) modSl=0, and adopts the first type of DM-RS resource in other transmission subframes. Mapping method, where, S1 has a period value that is pre-agreed or configured by high-level signaling, and offsetl is a subframe number offset value that is pre-agreed or configured by high-level signaling; or,

It is determined that PDSCH adopts the first type of DM-RS resource mapping method in the transmission subframe whose subframe number n satisfies (n-offsetl) modSl=0, and adopts the second type of DM-RS resource in other transmission subframes. Mapping method, where S1 has a period value pre-agreed or configured by higher-layer signaling, offsetl is a subframe number offset value pre-agreed or configured by higher-layer signaling; Determine that PDSCH is in the transmission subframe and/or PRB that meets the set conditions , adopt one of the two types of DM-RS resource mapping methods, otherwise, adopt another type of DM-RS resource mapping method, which specifically includes: Determining that the PDSCH is in the time division duplex TDD special subframe The first type of DM-RS resource mapping method is adopted, and in other transmission subframes, the second type of DM-RS resource mapping method is adopted; or,

Determine that PDSCH adopts the first type of DM-RS resource mapping method in the TDD special subframe using the extended CP, and in other transmission subframes, adopts the second type of DM-RS resource mapping method;

It is determined that the PDSCH adopts one of the two types of DM-RS resource mapping methods in the subframe and/or PRB that meets the set conditions; otherwise, uses the other type of DM-RS resource mapping method. , specifically including:

Determine that PDSCH adopts the first type of DM-RS resource mapping method in PDSCH transmission subframes containing PBCH and/or synchronization signal transmission, and adopts the second type of DM-RS resource mapping method in other transmission subframes; or,

Determine that the PDSCH is in the PDSCH transmission subframe that contains PBCH and/or synchronization signal transmission, and only use the first type of DM-RS resource mapping method in the PRB set that contains PBCH and/or synchronization signal transmission in the PRB set where the PDSCH transmission is located. , adopt the second type of DM-RS resource mapping method in the remaining PRBs in the PRB set or in the PDSCH transmission subframes that do not include PBCH and/or synchronization signal transmission; or,

Determine that the PDSCH uses one of the two types of DM-RS resource mapping methods in the transmission subframe and/or PRB that meets the set conditions, otherwise, uses the other type of DM-RS resource mapping. The method specifically includes: determining that the PDSCH is in the retransmission subframe of the PDSCH, using the first type of DM-RS resource mapping method, in the In the initial transmission subframe of PDSCH, the second type of DM-RS resource mapping method is adopted.

11. The method according to any one of claims 6 to 10, characterized in that the second type DM-RS resource mapping method is:

Based on the first type of DM-RS resource mapping method, only DM-RS is mapped to part of the DM-RS resources on the corresponding antenna port in the first type of DM-RS resource mapping method, and the obtained time domain sum /or a resource mapping method in which frequency domain DM-RS resources are truncated, wherein the part of the DM-RS resources is: In the first type of DM-RS resource mapping method, one subframe contains OFDM symbols of DM-RS mapping resources , REs corresponding to DM-RS on 2 adjacent OFDM symbols, and/or REs corresponding to DM-RS on at least one group of subcarriers with the same number of DM-RS mapping resources included in one subframe; or ,

12. A user equipment UE, characterized by: including:

Determining unit, configured to determine the DM-RS resource mapping method used in the downlink channel according to the pre-agreement between the UE and the network side, or according to the configuration information sent by the network side, where the DM-RS resource mapping method includes the first type DM-RS resource mapping method and second type DM-RS resource mapping method. The first type DM-RS resource mapping method is the DM-RS resource mapping method defined in the Long Term Evolution Enhanced LTE-A Rel-10 system, so The second type of DM-RS resource mapping method is a mapping method in which DM-RS occupies less resources than the first type of DM-RS resource mapping method;

The acquisition unit is configured to acquire DM-RS information in the transmission resources of the downlink channel according to the determined DM-RS resource mapping method.

13. The UE according to claim 12, wherein the determining unit determines the DM-RS resource mapping method used in the downlink channel according to the configuration information sent by the network side, specifically including:

The configuration information includes configuration information that independently indicates the DM-RS resource mapping method used by different downlink channels. According to the configuration information corresponding to each downlink channel, it is determined that the downlink channel uses the first type of DM-RS resource mapping method. Or the second type of DM-RS resource mapping method, or determine that the downlink channel is in the subframe and/or physical resource block that meets the conditions.

One of the two types of DM-RS resource mapping methods is used in the PRB. Otherwise, the other type of DM-RS resource mapping method is used. The subframes and/or PRBs that meet the conditions are based on the required The configuration information corresponding to the downlink channel in the configuration information is determined or determined according to the pre-agreement between the UE and the network side; or,

The configuration information corresponding to PDSCH determines whether PDSCH adopts the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method. source mapping method, or, determine that the PDSCH uses one of the two types of DM-RS resource mapping methods in the subframe and/or PRB that meets the conditions, otherwise, use the other type of DM-RS Resource mapping method, the subframes and/or PRBs that meet the conditions are determined according to the configuration information corresponding to the PDSCH or according to the pre-agreement between the UE and the network side;

The determining unit determines the DM-RS resource mapping method used in the downlink channel according to the pre-agreement between the UE and the network side, specifically including:

According to the pre-agreement between the UE and the network side, it is determined that the E-PDCCH adopts the first type of DM-RS resource mapping method; and/or, according to the pre-agreement between the UE and the network side, it is determined that the physical broadcast channel PBCH adopts the first type of DM-RS resource mapping method. RS resource mapping method; and/or,

According to the pre-agreement between the UE and the network side, it is determined that the PDSCH adopts the second type DM-RS resource mapping method in all transmission subframes of the PDSCH, or adopts the second type DM-RS resource mapping method in the transmission subframes and/or PRBs that meet the set conditions. Use one of the two types of DM-RS resource mapping methods, otherwise, use another type of DM-RS resource mapping method; and/or,

14. The UE according to claim 12 or 13, wherein the determining unit uses physical downlink control channel PDCCH signaling, enhanced physical downlink control channel E-PDCCH signaling, media access control MAC signaling, wireless At least one type of signaling in resource control RRC signaling receives the configuration information.

15. The UE according to claim 13, wherein the determining unit determines that the PDSCH adopts one of the two types of DM-RS resource mapping modes in the transmission subframe and/or PRB that meets the set conditions. -RS resource mapping method, otherwise, another type of DM-RS resource mapping method is adopted, specifically including:

It is determined that PDSCH adopts the second type of DM-RS resource mapping method in the transmission subframe whose subframe number n satisfies (n-offsetl) modSl=0, and adopts the first type of DM-RS in other transmission subframes. Resource mapping method, where S 1 is a period value that is pre-agreed or configured by high-level signaling, and offsetl is a subframe number offset value that is pre-agreed or configured by high-level signaling; or,

Determine that PDSCH adopts the first type of DM-RS resource mapping method in the transmission subframe whose subframe number n satisfies (n-offsetl) modS l=0, and adopts the second type of DM-RS resource mapping in other transmission subframes. method, where S 1 is a period value that is pre-agreed or configured by high-level signaling, and offset 1 is a sub-frame number offset value that is pre-agreed or configured by high-level signaling; One of the two types of DM-RS resource mapping methods is used in the frame and/or PRB. Otherwise, the other type of DM-RS resource mapping method is used, specifically including:

Determine that the PDSCH adopts the first type of DM-RS resource mapping method in the time division duplex TDD special subframe, and adopts the second type of DM-RS resource mapping method in other transmission subframes; or, Determine that the PDSCH adopts the first type of DM-RS resource mapping method in the TDD special subframe using the conventional cyclic prefix CP, and in other transmission subframes, adopts the second type of DM-RS resource mapping method; or,

The determining unit determines that the PDSCH adopts one of the two types of DM-RS resource mapping modes in the transmission subframe and/or PRB that meets the set conditions; otherwise, adopts the other type of DM-RS resource mapping mode. RS resource mapping method, specifically including:

Determine that PDSCH adopts the first type of DM-RS resource mapping method in PDSCH transmission subframes containing PBCH and/or synchronization signal transmission, and adopts the second type of DM-RS resource mapping method in other PDSCH transmission subframes; or,

Determine that the PDSCH is in the PDSCH transmission subframe containing PBCH and/or synchronization signal transmission, and in the PRB set containing PBCH and/or synchronization signal transmission in the PRB set where the PDSCH transmission is located, adopt the first type of DM-RS resource mapping method, In the remaining PRBs in the PRB set or in the PDSCH transmission subframes that do not include PBCH and/or synchronization signal transmission, the second type of DM-RS resource mapping method is adopted; or,

It is determined that the PDSCH uses the first type of DM-RS resource mapping method in the retransmission subframe of the PDSCH, and the second type of DM-RS resource mapping method is used in the initial transmission subframe of the PDSCH.

16. The UE according to any one of claims 12 to 15, characterized in that the second type DM-RS resource mapping method determined by the determining unit is:

Based on the first type of DM-RS resource mapping method, only DM-RS is mapped to part of the DM-RS resources on the corresponding antenna port in the first type of DM-RS resource mapping method, and the obtained time domain sum /or a resource mapping method in which frequency domain DM-RS resources are truncated, wherein the part of the DM-RS resources is: In the first type of DM-RS resource mapping method, one subframe contains DM-RS mapping resources In OFDM symbols, the REs corresponding to the DM-RS on two adjacent OFDM symbols, and/or, the REs corresponding to the DM-RS on at least one group of subcarriers with the same number of DM-RS mapping resources included in one subframe ; or,

It is satisfied that the number of orthogonal frequency division multiplexing OFDM symbols containing DM-RS mapping resources in one subframe is less than the number of OFDM symbols in the first type of DM-RS resource mapping method, and/or contains DM-RS mapping resources. The number of resource units RE corresponding to the DM-RS on the OFDM symbol of the RS mapping resource is smaller than the number of REs in the first type of DM-RS resource mapping method. A redefined resource mapping method.

17. A network side device, characterized in that it includes:

Determining unit, used to determine the DM-RS resource mapping method used in the downlink channel. The DM-RS resource mapping method includes a first type of DM-RS resource mapping method and a second type of DM-RS resource mapping method. The third type of DM-RS resource mapping method is The first type of DM-RS resource mapping method is the DM-RS resource mapping method defined in the Long Term Evolution Enhanced LTE-A Rel-10 system, and the second type of DM-RS resource mapping method is relative to the first type of DM-RS resource mapping method. RS resource mapping method DM-RS mapping method to reduce resource occupation;

A transmission unit, configured to perform DM-RS resource mapping and transmission in the transmission resources of the downlink channel according to the determined DM-RS resource mapping method.

18. The network side device according to claim 17, wherein the determining unit determines the DM-RS resource mapping method used for the downlink channel, specifically including:

According to the pre-agreement between the network side device and the user equipment UE, the DM-RS resource mapping method used in the downlink channel is determined.

19. The network side device according to claim 18, wherein the determining unit determines the DM-RS resource mapping method used in the downlink channel according to transmission conditions and/or transmission requirements, and sends the DM-RS resource mapping method to the user equipment UE. Configuration information indicating the DM-RS resource mapping method, specifically including:

Determine that all downlink channels of the UE adopt the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method, and send a message indicating the determined DM-RS resource mapping method to the UE. Configuration information; or, for each downlink channel, determine that the downlink channel adopts the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method, or, determine that the downlink channel satisfies the conditions. One of the two types of DM-RS resource mapping methods is used in the subframe and/or physical resource block PRB. Otherwise, the other type of DM-RS resource mapping method is used, and the DM-RS resource mapping method is provided to the UE. Send configuration information, the configuration information includes configuration information that independently indicates the DM-RS resource mapping mode used by different downlink channels, and the subframes and/or PRBs that meet the conditions are determined by the determining unit and passed through the The configuration information corresponding to the downlink channel in the configuration information is notified to the UE or is determined according to a predetermined agreement between the network side device and the UE; or,

Determine whether the physical downlink shared channel PDSCH adopts the first type of DM-RS resource mapping method or the second type of DM-RS resource mapping method, or determines that PDSCH adopts two types of DM-RS in subframes and/or PRBs that meet the conditions. One type of DM-RS resource mapping method among the resource mapping methods. Otherwise, another type of DM-RS resource mapping method is adopted, and configuration information is sent to the UE. The configuration information only indicates the DM-RS used by PDSCH. In the resource mapping mode, the subframes and/or PRBs that meet the conditions are determined by the determination unit and notified to the UE through the configuration information or determined according to a pre-agreement between the network side device and the UE; The determination unit determines the DM-RS resource mapping method used in the downlink channel according to the pre-agreement between the network side device and the user equipment UE, specifically including:

According to the pre-agreement between the network side device and the user equipment UE, determine that the E-PDCCH adopts the first type of DM-RS resource mapping method; and/or,

According to the pre-agreement between the network side device and the user equipment UE, it is determined that the physical broadcast channel PBCH adopts the first type

DM-RS resource mapping method; and/or,

According to the pre-agreement between the network side device and the user equipment UE, it is determined that the PDSCH is in all transmission subframes of the PDSCH, and the second type DM-RS resource mapping method is adopted, or, in the transmission subframes and/or the transmission subframes that meet the set conditions Or in the PRB, use one of the two types of DM-RS resource mapping methods, otherwise, use the other type of DM-RS resource mapping method; and/or,

According to the pre-agreement between the network side device and the user equipment UE, it is determined that the PDSCH is in the PDSCH transmission subframe on the macro cell, and the first type of DM-RS resource mapping method is adopted.

20. The network side device according to claim 18 or 19, characterized in that the determining unit uses physical downlink control channel PDCCH signaling, enhanced physical downlink control channel E-PDCCH signaling, and media access control MAC signaling. . At least one signaling in radio resource control RRC signaling, sending the configuration information to the UE.

21. The network side device according to claim 19, characterized in that, the determining unit determines that the PDSCH adopts one of the two types of DM-RS resource mapping methods in the transmission subframe and/or PRB that meets the set conditions. One type of DM-RS resource mapping method, otherwise, another type of DM-RS resource mapping method is used, specifically including:

It is determined that PDSCH adopts the first type of DM-RS resource mapping method in the transmission subframe whose subframe number n satisfies (n-offsetl) modSl=0, and adopts the second type of DM-RS resource in other transmission subframes. Mapping mode, where S1 has a period value pre-agreed or configured by high-level signaling, offsetl is a sub-frame number offset value pre-agreed or configured by high-level signaling; the determination unit determines that the PDSCH is in the transmission subframe that meets the set conditions and /or In the PRB, one of the two types of DM-RS resource mapping methods is used, otherwise, the other type of DM-RS resource mapping method is used, specifically including:

Determine that PDSCH adopts the first type of DM-RS resource mapping method in the time division duplex TDD special subframe, and adopts the second type of DM-RS resource mapping method in other transmission subframes; or,

Determine that the PDSCH adopts the first type of DM-RS resource mapping method in the TDD special subframe using the conventional cyclic prefix CP, and in other transmission subframes, adopts the second type of DM-RS resource mapping method; or,

Determine that the PDSCH adopts the first type of DM-RS resource mapping method in the TDD special subframe using the extended CP, in In other transmission subframes, the second type of DM-RS resource mapping method is adopted;

The determining unit determines that the PDSCH uses one of the two types of DM-RS resource mapping methods in the transmission subframe and/or PRB that meets the set conditions; otherwise, uses the other type of DM -RS resource mapping method, specifically including:

Determine that the PDSCH is in the retransmission subframe of the PDSCH and adopt the first type of DM-RS resource mapping method, in the

In the initial transmission subframe of PDSCH, the second type of DM-RS resource mapping method is adopted.

22. The network side device according to any one of claims 17 to 21, characterized in that the second type DM-RS resource mapping method determined by the determining unit is:

It is satisfied that the number of orthogonal frequency division multiplexing OFDM symbols containing DM-RS mapping resources in one subframe is smaller than the number of OFDM symbols in the first type of DM-RS resource mapping method, and/or contains DM-RS mapping resources. A redefined resource mapping method in which the number of resource units RE corresponding to the DM-RS on the OFDM symbol of the RS mapping resource is smaller than the number of REs in the first type of DM-RS resource mapping method.