CN105634667A

CN105634667A - Method and device for processing physical downlink channel

Info

Publication number: CN105634667A
Application number: CN201410645275.0A
Authority: CN
Inventors: 邢艳萍; 潘学明; 沈祖康; 徐伟杰; 高雪娟
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2014-11-06
Filing date: 2014-11-06
Publication date: 2016-06-01
Anticipated expiration: 2034-11-06
Also published as: CN105634667B; WO2016070711A1

Abstract

The present invention discloses a method and a device for processing a physical downlink channel. The method comprises the steps of: determining an RE (Resource Element) occupied by a CSI-RS (Channel State Information-Reference Signal); and performing rate matching and physical resource mapping for a physical downlink channel according to the determined RE occupied by the CSI-RS. The method and the device of the invention can solve the problem that the RE used by the physical downlink channel conflicts with the RE occupied by the CSI-RS.

Description

Method and device for processing physical downlink channel

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for processing a physical downlink channel.

Background

In an LTE (long term evolution) system, a PDCCH (physical downlink control channel) carries scheduling information and other control information. The PDCCH is transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of a downlink subframe, where N may have a value of 1,2,3,4, where N ═ 4 is only allowed to occur in a system with a system bandwidth of 1.4 MHz. The number of symbols of the PDCCH (i.e., the number of control region symbols) is indicated by a PCFICH (physical control format indicator channel). The PDCCHs are distributed over the entire system bandwidth in the frequency domain, thereby obtaining a frequency diversity gain. After an Enhanced Physical Downlink Control Channel (EPDCCH) is introduced, the original PDCCH region still uses the original transmission and reception technology, and uses the original PDCCH resource, and this part of PDCCH region is called legacy PDCCH (legacy physical downlink control channel) region. The EPDCCH occupies time-frequency resources other than the legacy pdcch region and is sent, and uses partial resources of the original PDSCH (physical downlink shared channel) to implement multiplexing with the PDSCH in a frequency division manner, as shown in fig. 1, where the physical downlink channels are different from each other.

In one PRB (physical resource block), REs (resource elements) occupied by a CSI-RS (channel state information-ReferenceSignal, also called a channel state information pilot signal) in the PRB should not overlap with REs occupied by a PDCCH in the PRB. And the REs occupied by the EPDCCH in the PRB may overlap with the REs occupied by the CSI-RS, so that collision may occur.

With the rise of the internet of things, the support of MTC (machine type communication) in the LTE system is increasingly gaining attention. In order to reduce the cost of mtues (User equipment, i.e., terminals), a UE type is newly defined, which supports only a 1.4MHz bandwidth, unlike the conventional lte UE supporting a minimum 20MHz reception bandwidth. For a low-cost mtue supporting only 1.4MHz bandwidth, when it accesses a system with a bandwidth greater than 1.4MHz, there is also a possibility that a physical downlink control channel transmitted in a data region collides with REs occupied by CSI-RSs.

Therefore, a processing scheme for a physical downlink channel is needed to solve the problem that REs used by the physical downlink channel collide with REs used by CSI-RS.

Disclosure of Invention

The embodiment of the invention provides a method and a device for processing a physical downlink channel, which are used for solving the problem that RE used by the physical downlink channel conflicts with RE used by CSI-RS.

The embodiment of the invention provides a method for processing a physical downlink channel, which comprises the following steps:

determining Resource Elements (REs) occupied by a channel state information pilot signal (CSI-RS);

and performing rate matching and physical resource mapping on the physical downlink channel according to the determined RE occupied by the CSI-RS.

Preferably, the determining the RE occupied by the CSI-RS, and performing a rate matching and physical resource mapping on the physical downlink channel according to the determined RE occupied by the CSI-RS include a first mode, a second mode, or a third mode;

the first mode specifically includes: determining all REs which are possibly occupied by the CSI-RS in all subframes which are possibly configured with the CSI-RS, and removing all REs which are possibly occupied by the ZPCSI-RS with zero power and the NZPCSI-RS with non-zero power in all subframes which are possibly configured with the CSI-RS when performing rate matching and physical resource mapping on a physical downlink channel;

the second mode specifically includes: determining RE occupied by the CSI-RS according to the resource configuration information of the CSI-RS for rate matching, and removing the determined RE occupied by the CSI-RS when performing rate matching and physical resource mapping on a physical downlink channel;

the third mode specifically includes: and determining the RE actually occupied by the NZPCSI-RS or the RE actually occupied by the NZPCSI-RS and the ZPCSI-RS, when the rate matching is carried out on the physical downlink channel, not removing all the RE actually occupied by the CSI-RS, and when the physical downlink channel is subjected to physical resource mapping, perforating the RE actually occupied by the CSI-RS.

Preferably, the resource configuration information of the CSI-RS for rate matching is notified to the terminal through a system message or a terminal-specific signaling.

Preferably, one or a combination of the system message, the terminal-specific signaling and other messages sent before the system message or the terminal-specific signaling is sent through a physical downlink channel;

and when the system message, the terminal-specific signaling or the other messages are sent, determining the RE occupied by the CSI-RS by adopting the first mode or the third mode, and performing rate matching and physical resource mapping on the physical downlink channel for sending the system message, the terminal-specific signaling or the other messages according to the determined RE occupied by the CSI-RS.

Preferably, the resource configuration information of the CSI-RS for rate matching is only used for performing rate matching and resource mapping on the physical downlink channel, and the resource configuration information of the CSI-RS for measurement uses a dedicated signaling to notify the terminal.

Preferably, the resource configuration information of the CSI-RS for measurement only includes NZP CSI-RS.

Preferably, the resource configuration information of the CSI-RS for rate matching is CSI-RS resource configuration information configured for transmit diversity separately, and the CSI-RS resource configuration information meets the resource configuration requirement of transmit diversity; or,

only configuring a set of CSI-RS resource configuration information for rate matching, wherein the CSI-RS resource configuration information meets the resource configuration requirement of transmission diversity; or,

only configuring a set of CSI-RS resource configuration information for rate matching, wherein the CSI-RS resource configuration information does not consider the resource configuration requirement of transmission diversity;

the resource allocation requirement meeting the transmission diversity is that under the 2-port transmission diversity, on available symbols, frequencies of REs except cell-specific pilot signals CRS are continuous pairwise, and the number of the available REs in one orthogonal frequency division multiplexing OFDM symbol is an even number; or, under 4-port transmit diversity, on available symbols, REs except CRS are consecutive every 4 frequency domains, and the number of available REs in one OFDM symbol is an integer multiple of 4.

Preferably, the first, second and third modes are selected according to a Radio Network Temporary Identifier (RNTI) type, a Downlink Control Information (DCI) type, a search space type and/or a physical channel type.

The embodiment of the invention also provides another processing method of the physical downlink channel, which comprises the following steps:

and performing de-physical resource mapping and de-rate matching on the physical downlink channel according to the determined RE occupied by the CSI-RS.

Preferably, the determining the RE occupied by the CSI-RS, and performing physical resource de-mapping and rate de-matching on the physical downlink channel according to the determined RE occupied by the CSI-RS include a first mode, a second mode, or a third mode;

the first mode specifically includes: determining all REs which are possibly occupied by the CSI-RS in all subframes which are possibly configured with the CSI-RS, and removing all REs which are possibly occupied by the zero-power ZPCIE-RS and the non-zero-power NZPCIE-RS in all subframes which are possibly configured with the CSI-RS when performing de-physical resource mapping and de-rate matching on a physical downlink channel;

the second mode specifically includes: determining RE occupied by the CSI-RS according to the resource configuration information of the CSI-RS for rate matching, and removing the determined RE occupied by the CSI-RS when performing de-physical resource mapping and de-rate matching on a physical downlink channel;

the third mode specifically includes: determining all REs which may be occupied by the CSI-RS in all subframes which may be configured with the CSI-RS, and not removing any REs which may be occupied by the CSI-RS when performing de-physical resource mapping and de-rate matching on a physical downlink channel.

and when the system message, the terminal-specific signaling or the other messages are sent, determining the RE occupied by the CSI-RS by adopting the first mode or the third mode, and performing physical resource de-mapping and rate de-matching on the physical downlink channel used for sending the system message, the terminal-specific signaling or the other messages according to the determined RE occupied by the CSI-RS.

Preferably, the resource configuration information of the CSI-RS for rate matching is only used for performing de-physical resource mapping and de-rate matching on a physical downlink channel, and the resource configuration information of the CSI-RS for measurement is received by using a dedicated signaling.

The embodiment of the invention provides a processing device of a physical downlink channel, which comprises:

a determining unit, configured to determine resource elements RE occupied by a channel state information pilot signal CSI-RS;

and the processing unit is used for carrying out rate matching and physical resource mapping on the physical downlink channel according to the determined RE occupied by the CSI-RS.

Preferably, the method further comprises the following steps: a selection unit;

the selecting unit is configured to select the determined RE occupied by the CSI-RS, and perform a rate matching and physical resource mapping on a physical downlink channel according to the determined RE occupied by the CSI-RS, where the selecting unit includes a first mode, a second mode, or a third mode;

in the first mode, the determining unit is specifically configured to: determining all REs which can be occupied by CSI-RS in all subframes which can be configured with CSI-RS; the processing unit is specifically configured to: when rate matching and physical resource mapping are carried out on a physical downlink channel, all REs which are possibly occupied by a zero-power ZPCIE-RS and a non-zero-power NZPCIE-RS in all subframes which are possibly configured with the CSI-RS are removed;

in the second mode, the determining unit is specifically configured to: determining REs occupied by the CSI-RS according to the resource configuration information of the CSI-RS for rate matching; the processing unit is specifically configured to: removing the determined RE occupied by the CSI-RS when performing rate matching and physical resource mapping on a physical downlink channel;

in the third mode, the determining unit is specifically configured to: determining the RE actually occupied by the NZPCCSI-RS or the RE actually occupied by the NZPCCSI-RS and the ZPCCSI-RS; the processing unit is specifically configured to: when the rate matching is carried out on the physical downlink channel, not all the REs actually occupied by the CSI-RS are removed, and when the physical downlink channel is subjected to physical resource mapping, the REs actually occupied by the CSI-RS are punched.

when the system message, the terminal-specific signaling, or the other message is sent, the selecting unit is specifically configured to: and determining the RE occupied by the CSI-RS by adopting the first mode or the third mode, and performing rate matching and physical resource mapping on the physical downlink channel for sending the system message or the terminal dedicated signaling or the other messages according to the determined RE occupied by the CSI-RS.

Preferably, the selection unit is further configured to:

and selecting the first mode, the second mode and the third mode according to the type of the radio network temporary identifier RNTI, the type of the downlink control information DCI, the type of the search space and/or the type of the physical channel.

The embodiment of the present invention further provides another processing apparatus for a physical downlink channel, including:

and the processing unit is used for carrying out de-physical resource mapping and de-rate matching on the physical downlink channel according to the determined RE occupied by the CSI-RS.

Preferably, the method further comprises the following steps: a selection unit;

the selecting unit is configured to select the determined RE occupied by the CSI-RS, and perform ways of de-physical resource mapping and de-rate matching on a physical downlink channel according to the determined RE occupied by the CSI-RS, where the ways include a first way, a second way, or a third way;

in the first mode, the determining unit is specifically configured to: determining all REs which can be occupied by CSI-RS in all subframes which can be configured with CSI-RS; the processing unit is specifically configured to: when the physical resource mapping and the rate de-matching are carried out on the physical downlink channel, all REs which are possibly occupied by a zero-power ZPCIE-RS and a non-zero-power NZPCIE-RS in all subframes which are possibly configured with the CSI-RS are removed;

in the second mode, the determining unit is specifically configured to: determining REs occupied by the CSI-RS according to the resource configuration information of the CSI-RS for rate matching; the processing unit is specifically configured to: removing the determined RE occupied by the CSI-RS when performing de-physical resource mapping and de-rate matching on a physical downlink channel;

in the third mode, the determining unit is specifically configured to: determining all REs which can be occupied by CSI-RS in all subframes which can be configured with CSI-RS; the processing unit is specifically configured to: when the mapping of the physical resources and the de-rate matching are performed on the physical downlink channel, any RE possibly occupied by the CSI-RS is not removed.

when the system message, the terminal-specific signaling, or the other message is sent, the selecting unit is specifically configured to: and determining the RE occupied by the CSI-RS by adopting the first mode or the third mode, and performing de-physical resource mapping and de-rate matching on the physical downlink channel for sending the system message or the terminal dedicated signaling or the other messages according to the determined RE occupied by the CSI-RS.

Preferably, the selection unit is further configured to:

In the embodiment of the invention, because the REs occupied by the CSI-RS are firstly determined, and the rate matching and the physical resource mapping are carried out according to the positions of the REs when the rate matching and the physical resource mapping are carried out on the physical downlink channel, the problem that the REs used by the physical downlink channel conflict with the REs occupied by the CSI-RS can be solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a physical downlink channel in the prior art;

fig. 2 is a schematic diagram of a processing flow of a physical downlink channel implemented by a network side in an embodiment of the present invention;

fig. 3 is a schematic diagram of a physical downlink channel processing flow implemented by a terminal side in the embodiment of the present invention;

fig. 4 is a schematic diagram of a location of a physical downlink channel resource according to an embodiment of the present invention;

fig. 5 is a schematic diagram of available resources in a PRB during rate matching according to an embodiment of the present invention;

fig. 6 is a schematic diagram of available resources in a PRB during resource mapping according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a location of a subframe where a CSI-RS is located according to an embodiment of the present invention;

FIG. 8 is a diagram illustrating the location of CSI-RS resources within a PRB according to an embodiment of the present invention;

fig. 9 is a schematic diagram of available resources in a PRB during rate matching and physical resource mapping according to an embodiment of the present invention;

fig. 10 is a schematic diagram of another example of the available resources in a PRB during rate matching and physical resource mapping according to the present invention;

fig. 11 is a schematic diagram of CSI-RS resource locations with ports configured as 0, 4, 5, and 9 in one PRB according to an embodiment of the present invention;

fig. 12 is a schematic diagram of another example of the available resources in a PRB during rate matching and physical resource mapping according to the present invention;

fig. 13 is a schematic structural diagram of a device for processing a physical downlink channel used in the flow shown in fig. 2 according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a physical downlink channel processing apparatus used in the flow shown in fig. 3 according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of another physical downlink channel processing apparatus according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of another physical downlink channel processing apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 2 is a flowchart of a method for processing a physical downlink channel implemented on a network side, where the process may be performed by a device for processing the physical downlink channel, and the device may be a base station or may be located in the base station. The process specifically comprises the following steps:

step S201, determining REs occupied by CSI-RS.

Specifically, all REs that may be occupied by CSI-RS in all subframes where CSI-RS may be configured may be determined, or REs actually occupied by CSI-RS may be determined according to resource configuration information of CSI-RS for rate matching.

Step S202, according to the determined RE occupied by the CSI-RS, performing rate matching and physical resource mapping on the physical downlink channel.

Specifically, the REs possibly occupied by the CSI-RS or actually occupied REs may be removed when performing rate matching and physical resource mapping on the physical downlink channel; or when the rate matching is performed on the physical downlink channel, the RE actually occupied by the CSI-RS is not removed, but when the physical downlink channel is subjected to physical resource mapping, the RE actually occupied by the CSI-RS is punctured.

There are three ways to implement the processing flow of the physical downlink channel as described in step S201 and step S202. Three implementations of step S201 and step S202 are described in detail below.

In a first mode

In the first mode, all REs which may be occupied by CSI-RS in all subframes where CSI-RS may be configured are determined, and when rate matching and physical resource mapping are performed on a physical downlink channel, all REs which may be occupied by ZP CSI-RS (ZP is a zero-power English abbreviation and is zero-transmissionPower) and NZP CSI-RS (NZP is a Non-zero-power English abbreviation and is Non-zero-transmissionPower) in all subframes where CSI-RS may be configured are removed.

Mode two

In the second mode, according to the resource configuration information of the CSI-RS used for rate matching, the RE occupied by the CSI-RS is determined, and when the rate matching and the physical resource mapping are performed on the physical downlink channel, the determined RE occupied by the CSI-RS is removed.

Mode III

In the third mode, the actually occupied RE of the NZPCCSI-RS or the actually occupied RE of the NZPCCSI-RS and the ZPCCSI-RS is determined, when the rate matching is carried out on the physical downlink channel, all the actually occupied RE of the CSI-RS is not removed, and when the physical downlink channel is subjected to physical resource mapping, the actually occupied RE of the CSI-RS is punched.

In the second mode, the resource configuration information of the CSI-RS for rate matching is notified to the terminal through a system message or a terminal-specific signaling. The CSI-RS resource configuration information for rate matching is only used for rate matching and resource mapping of a physical downlink channel, and the CSI-RS resource configuration information for measurement is notified to a terminal by using a special signaling. The resource configuration information of the CSI-RS for measurement only includes NZP CSI-RS.

The CSI-RS resource configuration information for rate matching is CSI-RS resource configuration information configured for transmission diversity independently, and the CSI-RS resource configuration information meets the resource configuration requirement of transmission diversity; or only configuring a set of CSI-RS resource configuration information for rate matching, wherein the CSI-RS resource configuration information meets the resource configuration requirement of transmission diversity; or only configuring a set of CSI-RS resource configuration information for rate matching, wherein the CSI-RS resource configuration information does not consider the resource configuration requirement of transmission diversity; the resource allocation requirement meeting the transmission diversity is that on available symbols, two frequencies of REs except CRS are continuous and the number of the available REs in one OFDM symbol is even on the available symbols under the 2-port transmission diversity; or, under 4-port transmit diversity, on available symbols, REs except CRS are consecutive every 4 frequency domains, and the number of available REs in one OFDM symbol is an integer multiple of 4.

One or a combination of the system message, the terminal-specific signaling and other messages sent before the system message or the terminal-specific signaling is sent through a physical downlink channel, when the system message, the terminal-specific signaling or the other messages are sent, the RE occupied by the CSI-RS can be determined by adopting the mode one or the mode three, and the physical downlink channel used for sending the system message or the terminal-specific signaling or the other messages is subjected to rate matching and physical resource mapping according to the determined RE occupied by the CSI-RS.

In specific implementation, one of the three physical downlink channel processing manners may be selected according to one or more of information such as a Radio Network Temporary Identity (RNTI), a Downlink Control Information (DCI), a search space type, and a physical channel type.

Wherein, the RNTI type may include: C-RNTI (cell radio network temporary identity), SI-RNTI (radio network temporary identity for system messages), P-RNTI (radio network temporary identity for paging channel), RA-RNTI (radio network temporary identity for random access procedure), and the like. The DCI type may be a DCI type carrying scheduling information and a DCI type carrying control information. The search space types include a common search space type and a dedicated search space type. The physical channel types include a control channel and a data channel, for example, an EPDCCH (EPDCCH) belongs to the control channel, and a PDSCH (physical downlink shared channel) belongs to the data channel. In specific implementation, corresponding physical downlink channel processing modes can be predefined for different RNTI types, for example, if the physical downlink channel uses SI-RNTI for scrambling, the physical downlink channel processing flow described in the above mode three is adopted; for another example, if the physical downlink channel is sent in the common search space, the physical downlink channel processing procedure described in the above-mentioned manner one or manner three is adopted, and if the physical downlink channel is sent in the dedicated search space, the physical downlink channel processing procedure described in the above-mentioned manner two is adopted. Similarly, the correspondence between the DCI type and the three types of physical downlink channel processing manners may be predefined, or the correspondence between the DCI type and the three types of physical downlink channel processing manners may be predefined.

The physical downlink channels in the flow shown in fig. 2 may include control channels and/or data channels transmitted in a data region, such as EPDCCH and PDSCH, or channels for other purposes.

The physical downlink control channel in the embodiment of the present invention is not limited to the PDCCH, but refers to a physical downlink channel for carrying DCI, including EPDCCH and other physical channels for the purpose.

In the LTE system, because both uplink and downlink of low-cost MTC (machine type communication) UE only support 1.4MHz radio frequency bandwidth, when the UE accesses a system with a bandwidth greater than 1.4MHz, the original PDCCH is continuously transmitted in a control region, and a physical downlink control channel is also transmitted in a data region, where the physical downlink control channel may be referred to as M-PDCCH, and the M-PDCCH, an Enhanced Physical Downlink Control Channel (EPDCCH) and a PDSCH multiplex the data region in a frequency division manner, as shown in fig. 4. The M-PDCCH is used to carry scheduling information such as MCS (modulation and coding scheme) used, and may also carry other scheduling or control information. The M-PDCCH can be processed in one of the three physical downlink channel processing manners.

The above examples show that: the problem that the RE used by the physical downlink channel conflicts with the RE occupied by the CSI-RS can be solved by determining the RE occupied by the CSI-RS and performing one of three modes of rate matching and physical resource mapping on the physical downlink channel according to the determined RE occupied by the CSI-RS.

Fig. 3 shows a flowchart of a processing method of a physical downlink channel at a terminal side, which may be performed by a processing apparatus of the physical downlink channel, which may be the terminal or may be located in the terminal. The process specifically comprises the following steps:

step S301, determining REs occupied by CSI-RS.

Step S302, according to the determined RE occupied by the CSI-RS, the physical downlink channel is subjected to de-physical resource mapping and de-rate matching.

Specifically, the REs that may be occupied by the CSI-RS or the actually occupied REs may be removed when performing de-rate matching and de-physical resource mapping on the physical downlink channel; or when de-rate matching is performed on the physical downlink channel, the RE actually occupied by the CSI-RS is not removed, but when de-physical resource mapping is performed on the physical downlink channel, the RE actually occupied by the CSI-RS is punctured.

There are three ways to implement the processing flow of the physical downlink channel as described in step S301 and step S302. Three implementations of step S301 and step S302 are described in detail below, respectively.

In a first mode

The first mode of the terminal side processing flow corresponds to the first mode of the network side processing flow, in the first mode of the terminal side processing flow, all REs which are possibly occupied by CSI-RS in all subframes where the CSI-RS can be configured are determined, and when the physical downlink channel is subjected to de-physical resource mapping and de-rate matching, all REs which are possibly occupied by zero-power ZPCSI-RS and non-zero-power NZPCSI-RS in all subframes where the CSI-RS can be configured are removed.

Mode two

And in the second mode of processing the flow at the terminal side, determining the RE occupied by the CSI-RS according to the resource configuration information of the CSI-RS for rate matching, and removing the determined RE occupied by the CSI-RS when performing de-physical resource mapping and de-rate matching on the physical downlink channel.

Mode III

And in the terminal side process flow mode III, determining all REs possibly occupied by the CSI-RS in all subframes possibly configured with the CSI-RS, and not removing any REs possibly occupied by the CSI-RS when performing de-physical resource mapping and de-rate matching on a physical downlink channel.

In the second method for processing the flow at the terminal side, the resource configuration information of the CSI-RS for rate matching is notified to the terminal through a system message or a terminal-specific signaling. The CSI-RS resource configuration information for rate matching is only used for rate matching and resource mapping of a physical downlink channel, and the CSI-RS resource configuration information for measurement is notified to a terminal by using a special signaling. The resource configuration information of the CSI-RS for measurement only includes NZP CSI-RS.

One or a combination of the system message, the terminal-specific signaling and other messages sent before the system message or the terminal-specific signaling is sent through a physical downlink channel, when the system message, the terminal-specific signaling or the other messages are sent, the method one or the method three can be adopted to determine the RE occupied by the CSI-RS, and the physical downlink channel used for sending the system message or the terminal-specific signaling or the other messages is subjected to de-physical resource mapping and de-rate matching according to the determined RE occupied by the CSI-RS.

In specific implementation, one of the three physical downlink channel processing manners may be selected according to one or more of information such as an RNTI type, a DCI type, a search space type, and a physical channel type. The specific selection method is the same as the corresponding process in the foregoing network side processing flow, and is not described in detail here.

The physical downlink channels in the flow shown in fig. 3 may include control channels and/or data channels transmitted in a data region, such as EPDCCH and PDSCH, or channels for other purposes.

The above examples show that: the problem that Resource Elements (REs) used by a physical downlink channel conflict with occupied REs of a channel state information (CSI-RS) can be solved by determining the REs occupied by the CSI-RS and performing one of three implementation modes of resource allocation and rate de-matching on the physical downlink channel according to the determined REs occupied by the CSI-RS.

In order to better explain the present invention, the embodiment of the present invention provides an implementation process in a specific application scenario.

Scene one: and the network side sends a broadcast message in a third mode, informs the terminal of the CSI-RS resource configuration information for rate matching, and then processes the two physical downlink channels in a second mode.

Specifically, the broadcast message is sent in a mode without control channel scheduling, that is, the PDSCH carrying the broadcast message is sent in a predefined MCS (modulation and coding scheme) on a predefined PRB. The CRC (cyclic redundancy check) of the PDSCH is scrambled with a specific RNTI, such as SI-RNTI. And for the PDSCH carrying the broadcast message, not removing any possibly occupied RE of the CSI-RS when the rate is matched. For example, if the PDSCH employs a 4-port CRS-based transmit diversity scheme, the location of the available resources of the PDSCH within one physical resource block PRB is as shown in fig. 5.

The PDSCH is transmitted in a subframe without CSI-RS. If the subframe where the PDSCH is located has a CSI-RS signal, the REs actually occupied by the CSI-RS are punctured when performing physical resource mapping, that is, only the CSI-RS signal is transmitted in the REs where the CSI-RS is located, as shown in fig. 6.

The resource requirement of transmit diversity needs to be considered when configuring CSI-RS resources. For the transmit diversity scheme, SFBC (Space-frequency block code) is adopted in the case of 2 ports, while SFBC and Frequency Switching Transmit Diversity (FSTD) are combined to implement transmit diversity in the case of 4 ports, where two frequencies between REs are required to be continuous corresponding to 2 ports, the number of available REs in one OFDM symbol is an even number, and every 4 frequency domains between REs are required to be continuous corresponding to 4 ports, and the number of available REs in one OFDM symbol is an integer multiple of 4.

Assuming that the physical control channel/data channel adopting the second method adopts a CRS-based transmit diversity method, the CSI-RS configuration for rate matching notified by the network side in the SIB needs to satisfy the above requirements. For example, assuming that the physical control channel/data channel adopting the second method adopts CRS-based 4-port transmit diversity, it is necessary to ensure that REs other than CRS and CSI-RS satisfy: the number of the usable REs in each 4 frequency domains among the REs is an integral multiple of 4.

The resource configuration information of the CSI-RS used for rate matching in the broadcast message comprises the number of CSI-RS antenna ports, CSI-RS subframe configuration and CSI-RS resource configuration numbers.

Such as: two sets of CSI-RS configurations are signaled in the SIB (system information blocks):

1) the number of antenna ports (antennaPortsCount) is 8, the CSI-RS resource configuration number (resourceConfig) is 0, and the CSI-RS subframe configuration (subframeConfig) is 1;

2) the antenna port number (antennaPortsCount) is 8, the CSI-RS resource configuration number (resourceConfig) is 4, and the CSI-RS subframe configuration (subframeConfig) is 1.

According to the configuration definition of the CSI-RS subframe, the subframe where the CSI-RS is located is satisfiedSubframe configuration 0 corresponds to CSI-RS period T_CSI-RS5ms, CSI-RS subframe offset △_CSI-RSIs 1. The specific configuration information is shown in table 1.

TABLE 1

The subframe where the CSI-RS is located is shown in fig. 7.

The terminal assumes that there is no CSI-RS in the special subframe of frame structure 2, the subframe in which SIB1 is located (subframe 5 of the even radio frame), and the subframe in which the paging message is configured to be transmitted. Also, a CSI-RS colliding with a PBCH (physical broadcast channel) is not transmitted.

In one PRB, the RE positions corresponding to CSI-RS resource configuration numbers 0 and 4 are determined according to the resource configuration mechanism of the existing nzp CSI-RS, and the specific positions are shown in fig. 8.

And after the network side notifies the CSI-RS resource configuration for rate matching, when performing rate matching and physical resource mapping on the physical downlink channel, removing REs occupied by the CSI-RS according to the CSI-RS resource configuration information for rate matching configured by the network.

Still taking the transmit diversity mode based on the 4-port CRS as an example, the network side removes REs occupied by the CSI-RS configured by the network side when performing rate matching and physical resource mapping on the physical downlink channel, where the positions of the REs occupied by the CSI-RS to be removed are shown in fig. 9.

Accordingly, the terminal side receives a PDSCH carrying a broadcast message with a specific RNTI on a predefined PRB. The terminal determines the third usage mode to process according to the specific RNTI, specifically, when performing the de-physical resource mapping and de-rate matching on the PDSCH, any RE that may be occupied by the CSI-RS is not removed, that is, the available resource of the PDSCH in one PRB is as shown in fig. 5.

After correctly receiving the resource configuration information of the CSI-RS for rate matching in the broadcast message, the terminal removes the REs occupied by the CSI-RS according to the configured CSI-RS resource configuration information for rate matching when performing the de-physical resource mapping and de-rate matching on the physical downlink channel, that is, the REs occupied by the CSI-RS in one PRB are as shown in fig. 9. In this process, since the physical downlink channel transmitted by the network side in the second mode is transmitted in the dedicated search space, and the second mode in the network side flow and the second mode in the terminal side flow are predefined for the dedicated search space to be used for processing, the terminal uses the corresponding second mode in the terminal side flow to process the physical downlink channel.

Scene two: and the network side sends a broadcast message in a first mode, informs CSI-RS resource configuration information for rate matching, and then processes the two physical downlink channels in a second mode.

Specifically, the broadcast message is sent by a control channel scheduling mode, and the control channel is an M-PDCCH. And multiplexing the M-PDCCH, the EPDCCH and the PDSCH in a frequency division mode. The transmission mode of the M-PDCCH is CRS-based transmission diversity. The resource location of the M-PDCCH is shown in fig. 4.

And the network side removes all REs possibly occupied by ZP/NZP CSI-RS in all subframes possibly configured with CSI-RS during rate matching and physical resource mapping for the M-PDCCH and the corresponding PDSCH. For example, if the M-PDCCH and the PDSCH both use a 2-port CRS based transmit diversity scheme, the available resources in one PRB in the subframe where the CSI-RS exists are as shown in fig. 10.

The resource configuration information of the CSI-RS for rate matching in the broadcast message is indicated as follows, including CSI-RS subframe configuration and CSI-RS resource configuration bitmap.

Such as: the network side informs the following CSI-RS configuration in SIB:

the resource configuration list (ResourceConfigList) is 10001000000000000, and the CSI-RS subframe configuration (subframeConfig) is 1;

the CSI-RS subframe determines the configuration as in the first specific scenario described above.

In one PRB, the RE position corresponding to the CSI-RS resource configuration 10001000000000000 is determined according to the resource configuration mechanism of the existing zpccsi-RS, and the REs corresponding to ports nzpccsi-RS 4 are configured with 0 and 4, as shown in fig. 11.

And after the CSI-RS resource configuration for rate matching is notified, when the rate matching and the physical resource mapping are carried out on the physical downlink channel, the RE occupied by the CSI-RS is removed according to the configured CSI-RS resource configuration information for rate matching.

Assuming that a transmission mode based on DMRS (demodulation reference signal) is adopted for a physical downlink control channel and/or a data channel, where DMRS ports are 7 and CRS ports are 2, REs occupied by CSI-RS configured on a network side are removed when performing rate matching and physical resource mapping, and available resources are as shown in fig. 12.

Accordingly, when performing the de-physical resource mapping and de-rate matching on the M-PDCCH and the scheduled PDSCH thereof, the terminal removes all REs that may be occupied by the ZP/nzp CSI-RS in all subframes where the CSI-RS may be configured, that is, the resource locations available in one PRB for one PDSCH are shown in fig. 10. In this process, since the M-PDCCH transmitted by the network side in the first mode is transmitted in the common search space, and the first mode in the network side flow and the first mode in the terminal side flow are predefined for the common search space to perform processing, the terminal performs processing on the physical downlink channel by using the corresponding mode in the terminal side flow.

After correctly receiving the resource configuration information of the CSI-RS for rate matching in the broadcast message, the terminal removes REs occupied by the CSI-RS according to the configured CSI-RS resource configuration information for rate matching when performing de-physical resource mapping and de-rate matching on the physical downlink channel, that is, the available resource positions in one PRB are as shown in fig. 12. In this process, since the physical downlink channel transmitted by the network side in the second mode is transmitted in the dedicated search space, and the second mode in the network side flow and the second mode in the terminal side flow are predefined for the dedicated search space to be used for processing, the terminal uses the corresponding second mode in the terminal side flow to process the physical downlink channel.

Further, if considering that there is a gain for combining the traffic channel PDSCH with HARQ (hybrid automatic repeat request) and the resource utilization rate of the mode one is low, the mode one processing may be performed only on the M-PDCCH, and the mode three processing may be performed on the PDSCH scheduled on the M-PDCCH.

Combining the first scenario and the second scenario, when the network side notifies the CSI-RS resource configuration information for rate matching through a system message, two sets of resource configurations can be configured, wherein one set meets the resource configuration requirement of transmit diversity; the other set does not need to consider the resource allocation requirements of transmit diversity.

Based on the same technical concept, fig. 13 shows a processing apparatus for a physical downlink channel, which can be applied to the flow shown in fig. 2. The device may be a base station or may be located within a base station. The device includes:

a determining unit 1301, configured to determine REs occupied by CSI-RS;

a processing unit 1302, configured to perform rate matching and physical resource mapping on a physical downlink channel according to the determined RE occupied by the CSI-RS.

Preferably, the method further comprises the following steps: a selection unit 1303;

the selecting unit 1303 is configured to select the determined REs occupied by the CSI-RS, and perform a rate matching and physical resource mapping method on a physical downlink channel according to the determined REs occupied by the CSI-RS, where the method includes a first method, a second method, or a third method;

in the first manner, the determining unit 1301 is specifically configured to: determining all REs which can be occupied by CSI-RS in all subframes which can be configured with CSI-RS; the processing unit 1302 is specifically configured to: when the rate matching and the physical resource mapping are carried out on the physical downlink channel, all REs which are possibly occupied by ZPCCSI-RS and NZPCCSI-RS in all subframes which are possibly configured with the CSI-RS are removed;

in the second mode, the determining unit 1301 is specifically configured to: determining REs occupied by the CSI-RS according to the resource configuration information of the CSI-RS for rate matching; the processing unit 1302 is specifically configured to: removing the determined RE occupied by the CSI-RS when performing rate matching and physical resource mapping on a physical downlink channel;

in the third embodiment, the determining unit 1301 is specifically configured to: determining the RE actually occupied by the NZPCCSI-RS or the RE actually occupied by the NZPCCSI-RS and the ZPCCSI-RS; the processing unit 1302 is specifically configured to: when the rate matching is carried out on the physical downlink channel, not all the REs actually occupied by the CSI-RS are removed, and when the physical downlink channel is subjected to physical resource mapping, the REs actually occupied by the CSI-RS are punched.

Preferably, the resource configuration information of the CSI-RS for rate matching is notified to the terminal through a system message or terminal-specific signaling.

when the system message, the terminal-specific signaling, or the other message is sent, the selecting unit 1303 is specifically configured to: and determining the RE occupied by the CSI-RS by adopting the first mode or the third mode, and performing rate matching and physical resource mapping on the physical downlink channel for sending the system message or the terminal dedicated signaling or the other messages according to the determined RE occupied by the CSI-RS.

Preferably, the resource configuration information of the CSI-RS for measurement includes only NZP CSI-RS.

Preferably, the resource configuration information of the CSI-RS for rate matching is CSI-RS resource configuration information configured for transmit diversity separately, and the CSI-RS resource configuration information satisfies a resource configuration requirement of transmit diversity; or,

the resource allocation requirement meeting the transmission diversity is that on available symbols, two frequencies of REs except CRS are continuous and the number of the available REs in one OFDM symbol is even on the available symbols under the 2-port transmission diversity; or, under 4-port transmit diversity, on available symbols, REs except CRS are consecutive every 4 frequency domains, and the number of available REs in one OFDM symbol is an integer multiple of 4.

Preferably, the selecting unit 1303 is further configured to:

and selecting the first mode, the second mode and the third mode according to the type of RNTI, the type of DCI, the type of search space and/or the type of physical channel.

Based on the same technical concept, fig. 14 shows a processing apparatus for a physical downlink channel, which can be applied to the flow shown in fig. 3. The device can be a terminal or be positioned in the terminal. The device includes:

a determining unit 1401 for determining REs occupied by CSI-RS;

a processing unit 1402, configured to perform de-physical resource mapping and de-rate matching on the physical downlink channel according to the determined RE occupied by the CSI-RS.

Preferably, the method further comprises the following steps: a selection unit 1403;

the selecting unit 1403 is configured to select the determined REs occupied by the CSI-RS, and perform ways of de-physical resource mapping and de-rate matching on a physical downlink channel according to the determined REs occupied by the CSI-RS, where the ways include a first way, a second way, or a third way;

in the first mode, the determining unit 1401 is specifically configured to: determining all REs which can be occupied by CSI-RS in all subframes which can be configured with CSI-RS; the processing unit 1402 is specifically configured to: when the physical downlink channel is subjected to de-physical resource mapping and de-rate matching, all REs which are possibly occupied by ZPCCSI-RS and NZPCCSI-RS in all subframes which are possibly configured with the CSI-RS are removed;

in the second mode, the determining unit 1401 is specifically configured to: determining REs occupied by the CSI-RS according to the resource configuration information of the CSI-RS for rate matching; the processing unit 1402 is specifically configured to: removing the determined RE occupied by the CSI-RS when performing de-physical resource mapping and de-rate matching on a physical downlink channel;

in the third mode, the determining unit 1401 is specifically configured to: determining all REs which can be occupied by CSI-RS in all subframes which can be configured with CSI-RS; the processing unit 1402 is specifically configured to: when the mapping of the physical resources and the de-rate matching are performed on the physical downlink channel, any RE possibly occupied by the CSI-RS is not removed.

when the system message, the terminal-specific signaling, or the other message is sent, the selecting unit 1403 is specifically configured to: and determining the RE occupied by the CSI-RS by adopting the first mode or the third mode, and performing de-physical resource mapping and de-rate matching on the physical downlink channel for sending the system message or the terminal dedicated signaling or the other messages according to the determined RE occupied by the CSI-RS.

Preferably, the selection unit 1403 is further configured to:

Fig. 15 is a schematic diagram of another physical downlink channel processing apparatus according to an embodiment of the present invention, which is capable of implementing the method according to the above embodiment of the present invention. The apparatus may include: any number of interconnected buses and bridges, particularly one or more processors represented by processor 1501 and various circuits of memory represented by memory 1503, are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface and the transceiver 1504 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1501 is responsible for managing a bus architecture and general processing, and the memory 1503 may store data used by the processor 1501 in performing operations. The display 1502 may be a display device such as a CRT (cathode ray tube), a PDP (plasma display panel), a DLP (digital light processing), or an LCD (liquid crystal display).

The processor 1501, which is configured to read the program in the memory 1503, executes the following processes: determining REs occupied by CSI-RS, and performing rate matching and physical resource mapping on a physical downlink channel through the transceiver 1504 according to the determined REs occupied by CSI-RS.

The processor 1501 may select the determined REs occupied by the CSI-RS, and perform rate matching and physical resource mapping on the physical downlink channel according to the determined REs occupied by the CSI-RS, where the modes include a first mode, a second mode, or a third mode;

in the first mode, the processor 1501 determines all REs that may be occupied by CSI-RS in all subframes where CSI-RS may be configured, performs rate matching and physical resource mapping on a physical downlink channel through the transceiver 1504, and then the processor 1501 removes all REs that may be occupied by zero-power zpccsi-RS and non-zero-power nzpccsi-RS in all subframes where CSI-RS may be configured;

in the second mode, the processor 1501 determines REs occupied by CSI-RS according to resource configuration information of CSI-RS for rate matching, performs rate matching and physical resource mapping on a physical downlink channel through the transceiver 1504, and then the processor 1501 removes the determined REs occupied by CSI-RS;

in the third mode, the processor 1501 determines REs actually occupied by the nzp CSI-RS or the nzp CSI-RS and the zp CSI-RS, performs rate matching on the physical downlink channel through the transceiver 1504, the processor 1501 does not remove all REs actually occupied by the CSI-RS, performs physical resource mapping on the physical downlink channel through the transceiver 1504, and the processor 1501 performs puncturing on the REs actually occupied by the CSI-RS.

In the above process, the resource configuration information of the CSI-RS for rate matching is notified to the terminal through a system message or a terminal-specific signaling. One or a combination of the system message, the terminal-specific signaling and other messages sent before the system message or the terminal-specific signaling is sent through a physical downlink channel; when the system message, the terminal-specific signaling or the other message is sent, the processor 1501 determines REs occupied by CSI-RS in the first or the third manner, and performs rate matching and physical resource mapping on the physical downlink channel for sending the system message, the terminal-specific signaling or the other message through the transceiver 1504 according to the determined REs occupied by CSI-RS. The CSI-RS resource configuration information for rate matching is only used for performing rate matching and resource mapping on a physical downlink channel, and the CSI-RS resource configuration information for measurement is notified to a terminal by using a special signaling. The resource configuration information of the CSI-RS for measurement only includes NZP CSI-RS.

The processor 1501 selects among the first, second, and third modes according to an RNTI type, a DCI type, a search space type, and/or a physical channel type.

Memory 1503 storing one or more executable programs is used to configure the processor 1501.

Fig. 16 is a schematic diagram of another physical downlink channel processing apparatus according to an embodiment of the present invention, which is capable of implementing the method according to the foregoing embodiment of the present invention. The apparatus may include: any number of interconnected buses and bridges, with one or more processors represented by processor 1601 and various circuits of memory represented by memory 1603 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface and the transceiver 1605 can be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1601 is responsible for managing the bus architecture and general processing, and the memory 1603 may store data used by the processor 1601 in performing operations. The user interface 1604 may also be an interface capable of interfacing externally to a desired device for different user devices, including but not limited to a keypad, speaker, microphone, joystick, etc. The display 1602 may be a CRT, PDP, DLP, or LCD display device.

A processor 1601, configured to read the program in the memory 1603, executes the following processes: determining REs occupied by CSI-RS, and performing rate matching and physical resource mapping on a physical downlink channel through the transceiver 1605 according to the determined REs occupied by CSI-RS.

The processor 1601 may select the determined REs occupied by the CSI-RS, and perform a rate matching and physical resource mapping on a physical downlink channel according to the determined REs occupied by the CSI-RS, where the method includes a first method, a second method, or a third method;

in the first mode, the processor 1601 determines all REs that may be occupied by CSI-RS in all subframes where CSI-RS may be configured, performs rate matching and physical resource mapping on a physical downlink channel through the transceiver 1605, and then the processor 1601 removes all REs that may be occupied by zero-power zpccsi-RS and non-zero-power nzpccsi-RS in all subframes where CSI-RS may be configured;

in the second mode, the processor 1601 determines REs occupied by the CSI-RS according to resource configuration information of the CSI-RS for rate matching, performs rate matching and physical resource mapping on a physical downlink channel through the transceiver 1605, and then the processor 1601 removes the determined REs occupied by the CSI-RS;

in the third mode, the processor 1601 determines REs actually occupied by the nzp CSI-RS or REs actually occupied by the nzp CSI-RS and the zp CSI-RS, and when performing de-physical resource mapping and de-rate matching on the physical downlink channel through the transceiver 1605, the processor 1601 does not remove any REs that may be occupied by the CSI-RS.

In the above process, the resource configuration information of the CSI-RS for rate matching is notified to the terminal through a system message or a terminal-specific signaling. One or a combination of the system message, the terminal-specific signaling and other messages sent before the system message or the terminal-specific signaling is sent through a physical downlink channel; when the system message, the terminal-specific signaling or the other message is sent, the processor 6501 determines the REs occupied by the CSI-RS by using the first or the third method, and performs rate matching and physical resource mapping on the physical downlink channel for sending the system message, the terminal-specific signaling or the other message through the transceiver 1605 according to the determined REs occupied by the CSI-RS. The CSI-RS resource configuration information for rate matching is only used for performing rate matching and resource mapping on a physical downlink channel, and the CSI-RS resource configuration information for measurement is notified to a terminal by using a special signaling. The resource configuration information of the CSI-RS for measurement only includes NZP CSI-RS.

The processor 1601 selects among the first, second, and third ways according to an RNTI type, a DCI type, a search space type, and/or a physical channel type.

A memory 1603 for storing one or more executable programs used to configure the processor 1601.

The present invention is 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for processing a physical downlink channel is characterized in that the method comprises the following steps:

2. The method of claim 1, wherein the determining the REs occupied by the CSI-RS, and the performing the rate matching and the physical resource mapping on the physical downlink channel according to the determined REs occupied by the CSI-RS include a first method, a second method, or a third method;

3. The method of claim 2, wherein the resource configuration information of the CSI-RS for rate matching is signaled to a terminal through a system message or terminal-specific signaling.

4. The method of claim 3, wherein one or a combination of the system message, terminal-specific signaling, and other messages sent prior to the system message or the terminal-specific signaling are sent over a physical downlink channel;

5. The method of claim 2, wherein the resource configuration information of the CSI-RS for rate matching is only used for rate matching and resource mapping for a physical downlink channel, and the resource configuration information of the CSI-RS for measurement is signaled to the terminal by a dedicated signaling.

6. The method of claim 5, wherein the resource configuration information for the measured CSI-RS includes only NZP CSI-RS.

7. The method of claim 2, wherein the resource configuration information for the rate-matched CSI-RS is CSI-RS resource configuration information separately configured for transmit diversity, and the CSI-RS resource configuration information satisfies resource configuration requirements for transmit diversity; or,

8. The method according to claim 2, characterized in that the selection among the first, second and third modes is based on radio network temporary identity RNTI type, downlink control information DCI type, search space type and/or physical channel type.

9. A method for processing a physical downlink channel is characterized in that the method comprises the following steps:

10. The method of claim 9, wherein the determining REs occupied by CSI-RS, and the performing physical resource de-mapping and de-rate matching on the physical downlink channel according to the determined REs occupied by CSI-RS include a first mode, a second mode, or a third mode;

11. The method of claim 10, wherein the resource configuration information for the rate-matched CSI-RS is signaled to a terminal through a system message or terminal-specific signaling.

12. The method of claim 11, wherein one or a combination of the system message, terminal-specific signaling, and other messages sent prior to the system message or the terminal-specific signaling are sent over a physical downlink channel;

13. The method of claim 10, wherein the resource configuration information of the CSI-RS for rate matching is only used for performing de-physical resource mapping and de-rate matching on a physical downlink channel, and the resource configuration information of the CSI-RS for measurement is received by using dedicated signaling.

14. The method of claim 13, wherein the resource configuration information for the measured CSI-RS comprises only nzp CSI-RS.

15. The method of claim 10, wherein the resource configuration information for the rate-matched CSI-RS is CSI-RS resource configuration information separately configured for transmit diversity, and the CSI-RS resource configuration information satisfies resource configuration requirements for transmit diversity; or,

16. The method according to claim 10, wherein the selection among the first, second and third modes is based on a radio network temporary identity, RNTI, type, a downlink control information, DCI, type of search space and/or a physical channel type.

17. A device for processing a physical downlink channel, comprising:

18. The apparatus of claim 17, further comprising: a selection unit;

19. The apparatus of claim 18, wherein the resource configuration information for the rate-matched CSI-RS is signaled to a terminal through a system message or terminal-specific signaling.

20. The apparatus of claim 19, wherein one or a combination of the system message, terminal-specific signaling, and other messages sent prior to the system message or the terminal-specific signaling are sent over a physical downlink channel;

21. The apparatus of claim 18, wherein the resource configuration information of the CSI-RS for rate matching is only used for rate matching and resource mapping for a physical downlink channel, and the resource configuration information of the CSI-RS for measurement notifies a terminal with dedicated signaling.

22. The apparatus of claim 21, wherein the resource configuration information for the measured CSI-RS comprises only nzp CSI-RS.

23. The apparatus of claim 18, wherein the resource configuration information for rate-matched CSI-RS is CSI-RS resource configuration information separately configured for transmit diversity and the CSI-RS resource configuration information satisfies resource configuration requirements for transmit diversity; or,

24. The apparatus as recited in claim 18, wherein said selection unit is further configured to:

25. A device for processing a physical downlink channel, comprising:

26. The apparatus of claim 25, further comprising: a selection unit;

27. The apparatus of claim 26, wherein the resource configuration information for the rate-matched CSI-RS is signaled to a terminal through a system message or terminal-specific signaling.

28. The apparatus of claim 27, wherein one or a combination of the system message, terminal-specific signaling, and other messages sent prior to the system message or the terminal-specific signaling are sent over a physical downlink channel;

29. The apparatus of claim 26, wherein the resource configuration information of the CSI-RS for rate matching is only used for de-physical resource mapping and de-rate matching for a physical downlink channel, and the resource configuration information of the CSI-RS for measurement is received using dedicated signaling.

30. The apparatus of claim 29, wherein the resource configuration information for the measured CSI-RS comprises only nzp CSI-RS.

31. The apparatus of claim 26, wherein the resource configuration information for rate-matched CSI-RS is CSI-RS resource configuration information separately configured for transmit diversity and the CSI-RS resource configuration information satisfies resource configuration requirements for transmit diversity; or,

32. The apparatus as recited in claim 26, wherein said selection unit is further configured to: