WO2014047777A1

WO2014047777A1 - Control information channel processing method and device

Info

Publication number: WO2014047777A1
Application number: PCT/CN2012/081909
Authority: WO
Inventors: 官磊; 薛丽霞; 马莎
Original assignee: 华为技术有限公司
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2014-04-03
Also published as: CN103891372A

Abstract

Disclosed in the present invention and relating to the technical field of communications are a control channel reception method and device, which can avoid interference from CSI-RSs while detecting common information. By means of a user equipment (UE), an embodiment of the present invention determines a common search space resource; in said common search space resource, and on the assumption that a base station sends no Channel State Information Reference Signal (CSI-RS), said UE detects a first Enhanced Physical Downlink Control Channel (ePDCCH), said first ePDCCH is used for scheduling at least one of the following: system information block (SIB) messages, paging messages, and Random Access Channel (RACH) response messages. The embodiments of the present invention are applicable to control channel reception.

Description

Method and device for processing control channel

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

In the Long Term Evolution Advanced (LTE-A) system, a new carrier type (NCT) is introduced. The traditional control region can be omitted on the NCT, but the physical downlink control channel (Physical) The Downlink Control Channel (PDCCH) is replaced with an enhanced physical downlink control channel (ePDCCH), and the ePDCCH may be transmitted based on channel precoding. The ePDCCH allocates resources in units of resource block pairs (RB pairs). One RB pair occupies one subframe in the time domain and 12 orthogonal frequency division multiplexing in the frequency domain (Orthogonal Frequency Division Multiplexing) , OFDM) subcarrier. A physical resource block (PRB) pair set may be allocated to the ePDCCH, where the set may be understood as a resource in which the ePDCCH search space is located, so that the UE detects the ePDCCH in the search space, and the search space includes a user equipment (User Equipment, UE) specific search space and common search space.

In the UE-specific search space, when the UE detects the ePDCCH, the channel state information reference signal (CSI-RS) resource exists in the UE to perform rate matching on the CS I-RS, that is, it needs to be wrapped when the UE detects The resources occupied by the CS I-RS are only demodulated for other resources, or the UE assumes that the base station bypasses the CSI-RS resources to perform rate matching when transmitting the ePDCCH, so as to avoid CSI-RS to UE-specific ePDCCH. Detection caused interference.

However, in the prior art, when the UE demodulates the ePDCCH in the common search space, how to avoid the interference of the CSI-RS when detecting the public information has not proposed a solution. Summary of the invention

Embodiments of the present invention provide a method and apparatus for processing a control channel, which can avoid interference from CSI-RS when detecting public information. In one aspect, an embodiment of the present invention provides a method for processing a control channel, including: determining, by a user equipment, a resource of a common search space;

In the resource of the common search space, the UE detects a first enhanced physical downlink control channel ePDCCH based on a hypothesis that the base station does not send a channel state information reference signal CS I-RS, where the first ePDCCH is used to schedule a system message. At least one of a block S IB message, a paging message, and a random access channel RACH response message.

In another embodiment of the present invention, in the resource of the common search space, the UE is based on the assumption that the base station does not send the channel state information reference signal CSI-RS, and before the detecting the first ePDCCH, the method further includes: acquiring, by the UE The configuration information of the CS I-RS that is configured by the base station to the UE, the configuration information includes resource information of the CSI-RS, and the resource information includes a subframe in which the CSI-RS is located.

In another embodiment of the present invention, in the resource of the common search space, the UE detects the first ePDCCH based on the assumption that the base station does not send the channel state information reference signal CS I-RS, and includes:

And in the subframe where the CSI-RS is located, and in the resource of the common search space, the UE detects the first ePDCCH based on a hypothesis that the base station does not send the CSI-RS.

In another embodiment of the present invention, the UE is based on the assumption that the base station does not send the CS I-RS, and includes: the information transmitted on the resource of the CSI-RS is a scheduling message included in the first ePDCCH, where The scheduling message includes scheduling at least one of the SIB message, scheduling the paging message, and scheduling the RACH response message.

In another embodiment of the present invention, in the resource of the common search space, the UE detects the resource of the CSI-RS configured for the UE when the base station performs rate matching, and detects the resource. a second ePDCCH, where the second ePDCCH is configured to schedule information other than the SIB message, the paging message, and the RACH response message.

In another embodiment of the present invention, the UE uses the CSI-RS to measure channel information and/or interference information on resources of the CSI-RS.

In another embodiment of the present invention, when resources of the common search space are in a part of subframes, The UE performs measurement of channel information and/or interference information by using the CSI-RS outside the common search space, and based on the assumption that the base station does not send the CSI-RS, in the common search space. The first ePDCCH and/or the second ePDCCH are detected in a resource, and the second ePDCCH is configured to schedule information other than the SIB message, the paging message, and the RACH response message.

On the other hand, the embodiment of the present invention provides another method for processing a control channel, including: the base station configuring resources of a common search space for the UE;

In the resources of the common search space, the base station sends a first ePDCCH, and does not send a CSI-RS, where the first ePDCCH is used to schedule a system message block SIB message, a paging message, and a random access channel RACH response message. At least one of the messages.

In another embodiment of the present invention, before the sending, by the base station, the first ePDCCH, and not sending the CSI-RS, the resource of the common search space includes:

The base station configures, for the UE, a resource of a CS I-RS, where the resource includes a subframe in which the CSI-RS configured for the UE is located.

In another embodiment of the present invention, in the resources of the common search space, the sending, by the base station, the first ePDCCH, and not sending the CSI-RS includes:

In the subframe in which the CSI-RS is located, and in the resources of the common search space, the base station sends a first ePDCCH, and does not send the CSI-RS.

In another embodiment of the present invention, the information transmitted on the resource of the CS I-RS is a scheduling message included in the first ePDCCH, where the scheduling message includes scheduling the SIB message, scheduling the paging message, and At least one of the RACH response messages is scheduled.

In another embodiment of the present invention, in the subframe in which the CSI-RS is located, and in the resources of the common search space, when the base station performs rate matching, bypassing the configuration configured for the UE The CSI-RS resource is configured to send the second ePDCCH to the UE, where the second ePDCCH is used to schedule information other than the SIB message, the paging message, and the RACH response message.

In another embodiment of the present invention, when the resource of the common search space is in a part of a subframe, and the part of the subframe includes a subframe in which the CS I-RS of the UE is located, the base station is in a Sending the first ePDCCH and/or the second ePDCCH to the UE in a subframe in which the CSI-RS is located, where And not transmitting the CSI-RS;

The second ePDCCH is configured to schedule information other than the SIB message, the paging message, and the RACH response message, where the information transmitted on the CSI-RS resource is the first ePDCCH and And a scheduling message included in the second ePDCCH, where the scheduling message includes scheduling at least one of the SIB message, scheduling the paging message, and scheduling the RACH response message.

On the other hand, an embodiment of the present invention provides a user equipment, including:

a determining unit, configured to determine a resource of a common search space;

a first detecting unit, configured to detect, in a resource of the common search space, a first enhanced physical downlink control channel (ePDCCH) based on a hypothesis that the base station does not send a channel state information reference signal CSI-RS, where the first ePDCCH is used At least one of a system message block SIB message, a paging message, and a random access channel RACH response message is scheduled.

In another embodiment of the present invention, the user equipment further includes:

An acquiring unit, configured to acquire configuration information of a CSI-RS that is configured by the base station to the user equipment, where the configuration information includes resource information of the CSI-RS, where the resource information includes a child where the CSI-RS is located frame.

In another embodiment of the present invention, the first detecting unit is configured to:

In the subframe where the CSI-RS is located, and in the resources of the common search space, the base station does not transmit the CSI-RS hypothesis, and detects the first ePDCCH.

a second detecting unit, configured to: in the resource of the common search space, detect, according to the resource of the CS I-RS configured by the user equipment, when the base station performs rate matching, detecting the second ePDCCH The second ePDCCH is configured to schedule information other than the S IB message, the paging message, and the RACH response message.

In another embodiment of the present invention, the user equipment further includes: And a third detecting unit, configured to perform measurement of channel information and/or interference information by using the CSI-RS on the resource of the CSI-RS.

a fourth detecting unit, configured to: when the resource of the common search space is in a part of a subframe, use the CSI-RS outside the common search space to measure channel information and/or interference information, and The base station does not send the CSI-RS, and detects the first ePDCCH and/or the second ePDCCH in the resources of the common search space, where the second ePDCCH is used to schedule the SIB message, Information other than the paging message and the RACH response message.

On the other hand, an embodiment of the present invention provides another processing device for a control channel, including: a processor, configured to determine resources of a common search space;

And detecting, in the resource of the common search space, a first enhanced physical downlink control channel ePDCCH, where the first ePDCCH is used to schedule a system message block SIB, based on a hypothesis that the base station does not send the channel state information reference signal CS I-RS At least one of a message, a paging message, and a random access channel RACH response message

In another embodiment of the present invention, the processor is further configured to acquire configuration information of a CS I-RS that is configured by the base station to the device, where the configuration information includes resource information of the CSI-RS, where The resource information includes a subframe in which the CSI-RS is located.

In another embodiment of the present invention, the processor is specifically configured to:

In another embodiment of the present invention, the processor is further configured to:

Detecting, in the resource of the common search space, the second ePDCCH, the second ePDCCH is used for scheduling, based on the resource of the CSI-RS configured for the UE, when the base station performs rate matching, Information other than the S IB message, the paging message, and the RACH response message. In another embodiment of the present invention, the processor is further configured to: use the CS I-RS to perform measurement of channel information and/or interference information on resources of the CSI-RS.

In another embodiment of the present invention, the processor is further configured to: when the resources of the common search space are in a part of a subframe, use the CS I-RS outside the common search space to perform channel information. And/or measurement of interference information, and detecting, according to the assumption that the base station does not send the CSI-RS, the first ePDCCH and/or the second ePDCCH, the second ePDCCH, in a resource of the common search space And for scheduling information other than the SIB message, the paging message, and the RACH response message.

In another aspect, an embodiment of the present invention provides a base station, including:

a configuration unit, configured to configure a resource of a common search space for the UE;

a first sending unit, configured to send, in a resource of the common search space, a first ePDCCH, and not send the CSI-RS, where the first ePDCCH is used to schedule a system message block SIB message, a paging message, and a random Accessing at least one of the channel RACH response messages.

In another embodiment of the present invention, the configuration unit is further configured to configure, for the UE, a CSI-RS resource, where the resource includes a subframe in which the CSI-RS configured for the UE is located.

In another embodiment of the present invention, the first sending unit is specifically configured to:

And in the subframe in which the CSI-RS is located, and in a resource of the common search space, sending a first ePDCCH, and not transmitting the CSI-RS.

In another embodiment of the present invention, the base station further includes:

a second sending unit, configured to bypass the CSI-RS configured for the UE when the rate matching is performed in the subframe where the CSI-RS is located, and in the resources of the common search space And transmitting, by the UE, the second ePDCCH, where the second ePDCCH is configured to schedule information other than the SIB message, the paging message, and the RACH response message.

In another embodiment of the present invention, the base station further includes: a third sending unit, configured to: when the resource of the common search space is in a part of a subframe, and the part of the subframe includes a subframe where the CSI-RS of the UE is located, where the CSI-RS is located Sending the first ePDCCH and/or the second ePDCCH to the UE in a subframe, and not transmitting the CSI-RS;

In another aspect, the embodiment of the present invention provides another processing device for a control channel, including: a processor, configured to configure, for a UE, a resource of a common search space;

a transmitter, configured to send, in a resource of the common search space, a first ePDCCH, and not send the CS I-RS, where the first ePDCCH is used to schedule a system message block SIB message, a paging message, and a random connection At least one of the incoming channel RACH response messages.

And configuring, by the UE, a CSI-RS resource, where the resource includes a subframe in which the CSI-RS configured for the UE is located.

In another embodiment of the present invention, the transmitter is specifically configured to:

In another embodiment of the present invention, the transmitter is further configured to:

And in the subframe in which the CSI-RS is located, and in the resource of the common search space, when the rate matching is performed, the resource of the CSI-RS configured for the UE is bypassed, and the resource is sent to the UE. The second ePDCCH is configured to schedule information other than the SIB message, the paging message, and the RACH response message. In another embodiment of the present invention, the transmitter is further configured to:

When the resource of the common search space is in a part of a subframe, and the part of the subframe includes a subframe in which the CSI-RS of the UE is located, in a subframe in which the CS I-RS is located Transmitting, by the UE, the first ePDCCH and/or the second ePDCCH, and not sending the CSI-RS;

The second ePDCCH is configured to schedule information except the S IB message, the paging message, and the RACH response message, where the information transmitted on the CSI-RS resource is the first ePDCCH. And/or a scheduling message included in the second ePDCCH, where the scheduling message includes scheduling at least one of the SIB message, scheduling the paging message, and scheduling the RACH response message. .

An embodiment of the present invention provides a method and an apparatus for receiving a control channel, where a resource of a common search space is determined by a user equipment UE. In a resource of the common search space, the UE does not send a channel state information reference signal CSI based on the base station. The RS assumes that the first enhanced physical downlink control channel ePDCCH is detected, and the first ePDCCH is used to schedule at least one of a system message block SIB message, a paging message, and a random access channel RACH response message. The solution provided by the embodiment of the present invention, when the UE receives the ePDCCH, assuming that there is no CSI-RS in the subframe, when detecting the public information, for example, scheduling at least one of the SIB message, the paging message, and the RACH response message , to avoid the CSI-RS dry 4 especially. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a flow chart of a method (UE side) for receiving a control channel according to Embodiment 1 of the present invention;

2 is a flowchart of another method for receiving a control channel (base station side) according to Embodiment 1 of the present invention;

3 is a flowchart of a method (UE side) for receiving a control channel according to Embodiment 2 of the present invention; 4 is a flowchart of another method (base station side) for receiving a control channel according to Embodiment 2 of the present invention;

5 is a block diagram of a receiving device (UE) of a control channel according to Embodiment 3 of the present invention; FIG. 6 is a block diagram of another receiving device (UE) of a control channel according to Embodiment 3 of the present invention; Another block diagram of a receiving device (physical device) of a control channel according to Embodiment 3 of the present invention;

8 is a block diagram of a receiving device (base station) of a control channel according to Embodiment 3 of the present invention; FIG. 9 is a block diagram of another receiving device (base station) of a control channel according to Embodiment 3 of the present invention;

FIG. 10 is a block diagram of another receiving device (physical device) of a control channel according to Embodiment 3 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The Long Term Evolution (LTE) system includes different versions. For the Reb 10 version of the LTE system, the UE receives the synchronization signal, the Physical Broadcast Channel (PBCH), and the System Information Block (SIB). The random access channel (RACH) response message and the cell-level paging subframe are before the radio resource control (RRC) is established, and the base station has not configured the UE yet. CSI-RS, taking into account the synchronization signal, PBCH, SIB1 and cell-level paging subframes are fixed or specific, that is, the synchronization information is located on subframe 0 and subframe 5, PBCH is located on subframe 0, and SIB1 is located at even The subframe 5 of the radio frame is equal, so when the UE receives the synchronization signal, PBCH, SIB1 and the paging sub-frame of the cell level, if the common signal or channel conflicts with the CSI-RS, the UE does not set the CSI-RS. Existence, correspondingly, the base station does not transmit CSI-RS in these subframes, which can prevent the CSI-RS from interfering with the reception of the synchronization signal, PBCH, SIB1 and paging. However, for the Re 1-10 version of the LTE system, when the UE receives the RACH response message and the SIB (SIB2 to SIB13) other than SIB1, there is also a case where the CS I-RS is not yet configured for the UE, so the UE is When detecting the PDSCH of the RACH response and detecting the PDSCH of other S IBs other than SIB1, it is assumed that the CSI-RS does not exist; however, when the base station transmits the information, it is not in the synchronization signal, PBCH, SIB1 and cell level search. On the subframe where the call is located, the base station can transmit the CS I-RS. That is to say, the UE may be interfered by the CSI-RS when detecting the PDSCH of the RACH response message and detecting the PDSCH of other SIBs other than the SIB1. The reason for this problem is that the RACH response message and other SIBs other than SIB1 have no fixed transmission time, but are in the respective transmission subframe window, so if these subframes are restricted, the CSI-RS cannot be transmitted. In the end, it may cause the CSI-RS to be completely unsuccessful, so it is unacceptable.

To solve the above problem, one solution is to implement a method implemented by a base station. Specifically, the base station schedules the above information (the PDSCH of the RACH response message and the PDSCH of the SIB other than the SIB1) in the synchronization signal, the PBCH, the SIB1, and the cell level. The paging is on the sub-frame. For example, suppose that the paging subframe of the current cell is subframe 9, and then consider that subframes 0, 5 are to carry PBCH and synchronization signals, so the above information can be scheduled on subframes 0, 5, 9, but the problem is introduced. Scheduling restrictions. Otherwise, it may be interfered by CSI-RS. However, considering the interference to the PDSCH, the base station can transmit these PDSCHs with a more conservative modulation and coding scheme to reduce the reception performance loss caused by CS I-RS interference.

In the LTE system of the version 11, the UE-specific search space of the ePDCCH is introduced, and the UE bypasses the CSI-RS by de-rate matching when receiving the ePDCCH in the UE-specific search space. The problem is that the CSI-RS is configured by the UE-specific signaling, and different UEs can be configured with different CSI-RSs. Therefore, the above-mentioned detection of the ePDCCH may still introduce the influence of the CSI-RS, that is, the CSI-RS of other UEs may be As an ePDCCH to receive. This problem can be solved by the implementation of the base station. For example, the CS I-RS set seen by the UE under one base station is the same. Specifically, the resource location of the non-zero power CSI-RS configured to the UE1 is configured for the UE2. The zero-power CSI-RS is such that the total set of CSI-RSs seen by UE1 and UE2 is consistent, and thus there is no CS I-RS that interferes with ePDCCH reception in the UE-specific search space. In Release 12 or future LTE systems, a common search space for ePDCCH will be introduced. Especially considering the introduction of the new carrier type, since the backward compatible control area can be configured on the new carrier, that is, the backward compatible common search space does not exist, if the new carrier type is to exist independently, a natural solution is introduced. The common search space of the ePDCCH to provide the functionality of a previously backward compatible public search space.

The introduction of the common search space of ePDCCH, there will still be CS I-RS related problems, and the problem is more serious than the above problems of Re Bu 10 and Re Bu 11. specific:

1) The downlink control information 3/3A of the original group power control is transmitted in the backward compatible control region, and there is no CS I-RS in the control region, so 3/3A is not affected by the CS I-RS, but ePDCCH The resources of the public search space will be in units of PRB pairs and will therefore be affected by the CS I-RS;

2) In future network deployments, heterogeneous networks will be deployed in large numbers. That is, some or a large number of micro cells will be deployed in the coverage of a macro cell. The macro cell and the micro cells may share the same physical cell identity. In this scenario, the number of UEs served in the range of the macro cell is larger than the number of UEs in the traditional cell, so that the transmission capacity of the common control channel is larger than that of the previous system, such as the RACH response information, so the RACH response can be scheduled. PBCH, S IB1 and the subframe in which the cell-level paging is located to avoid the interference caused by the CS I-RS, but the scheduling restriction is large; the scheduling restriction may be ignored, but the CS I-RS interference may be caused, but The ePDCCH itself is also subject to interference, because ePDCCH allocates resources in units of PRB pa ir and therefore contains CS I-RS resources; whereas in Re l-10 and Reb 11 systems, only PDSCH is interfered, PDCCH In the control region, the CS I-RS is not in the control region, so the PDCCH is not interfered.

3) The interference of the CS I-RS for the ePDCCH scheduling in the UE-specific search space may be solved by the implementation method of the base station, so the UE-specific search space is configured when the UE enters the connected state or enters the connected state; The common search space, the UE is likely to be configured without CS I-RS, that is, the CS I-RS configuration in the current cell is not known, so in addition to the scheduling restrictions mentioned above, the interference caused by this CS I-RS is Cannot be solved by the implementation method of the base station.

In summary, after the CS I-RS related problem is introduced in the common search space of the ePDCCH, the downlink control channel itself is interfered due to the scheduling restriction, and the interference cannot be except the scheduling restriction. The problem solved by the method implemented by the base station causes this problem to be more serious than in the previous LTE systems of the Rel-10 and Reb 11 versions. Therefore, in order to solve the above problem, the method provided by the embodiment of the present invention may be used, and the following embodiments are specifically referred to.

Example 1

An embodiment of the present invention provides a method for processing a control channel, where the method is performed by a UE. As shown in FIG. 1, the method includes:

Step 101: The UE determines a resource of a public search space.

In this embodiment, the common search space (CSS) resource specifically refers to the time-frequency resource of the enhanced physical downlink control channel ePDCCH. The common search space refers to a search space that all UEs in a cell need to detect. In addition, the search space further includes a UE-specific search space. The search space of the UE-specific search space pointer for a certain UE only carries control information for the UE. .

In this step, the UE may acquire the enhanced eCSS resource by using the cell identifier and the physical broadcast channel PBCH.

Specifically, the UE may obtain the eCSS resource by using the relationship between the cell identifier and the physical resource block (PRB) pa ir on the carrier, for example, the cell identifier is divided by the number of PRB pa irs on the carrier to obtain a remainder, and the remainder is obtained. That is to obtain the resources of eCSS;

The UE may obtain the resources of the eCSS by using the configuration information of the physical broadcast channel, and specifically, obtain the resources of the eCSS on the current carrier by reading configuration information such as bits or scrambling codes in the physical broadcast information;

In addition, the UE may also obtain the eCSS resource by using the joint indication of the cell identifier and the physical broadcast channel, or obtain the eCSS resource by blindly detecting the ePDCCH in the eCSS.

Step 102: In the resource of the common search space, the UE detects a first enhanced physical downlink control channel ePDCCH based on a hypothesis that the base station does not send a channel state information reference signal CSI-RS, where the first ePDCCH is used for scheduling At least one of a System Message Block (SIB) message, a paging message, and a random access channel RACH response message.

In this embodiment, the SIB message is used to carry system information, and the paging message is used to carry paging messages. The paging message may be a paging message of the UE, or may be a paging message that notifies the system of the message update, and the RACH response message is used to carry the RACH response information.

In this step, when the UE is not sent by the base station, when the UE detects the first ePDCCH, the UE may be in a Radio Resource Control (RRC) connection state; or, the UE may be in the radio resource control (RRC) connection state; Unconnected state. It should be noted that the CSI-RS is configured by the base station to the UE by using RRC dedicated signaling, where the CSI-RS is a reference signal for measuring channel state information (CSI) and/or interference information. The channel information includes at least one of channel quality indication information, precoding matrix indication information, and channel rank indication information.

In this step, if the UE is in an RRC connected state, the UE may be configured with a CSI-RS by the base station. In addition, even if the UE is configured with a CSI-RS, it is necessary to assume that there is no CS I-RS, that is, the base station does not transmit the CSI-RS, and detects the first ePDCCH because of the SIB message, the paging message, the RACH response message, and the like. The public information may also be sent for the UE that is not in the RRC connected state and the UE in the RRC connected state, and the UE that is not in the RRC connected state will not be configured to measure the CSI and the CSI-RS of the special information. Therefore, when the UE that is not in the RRC connected state detects at least one of the SIB message, the paging message, and the RACH response message, the UE is configured to interfere with the CSI-RS of the connected UE. Therefore, the embodiment adopts It is assumed that there is no CSI-RS in the common search space resource in the received subframe to detect at least one of public information, such as SIB message, paging message and RACH response message, to avoid being affected by CSI-RS .

An embodiment of the present invention provides a method for receiving a control channel, where the UE detects a first ePDCCH, where the first ePDCCH is used, based on a resource of a common search space, when the UE is not sent by the base station according to the CS I-RS. At least one of a system message block SIB message, a paging message, and a random access channel RACH response message is scheduled. The solution provided by the embodiment of the present invention assumes that the first ePDCCH for scheduling at least one of a system message block SIB message, a paging message, and a random access channel RACH response message is not present in the public search space resource. CSI-RS, avoiding the CSI-RS.

An embodiment of the present invention provides a processing method for a control channel, where an execution entity of the method is a base station. As shown in Figure 2, the method includes:

Step 201: The base station configures resources of the public search space for the UE.

Specifically, when configuring the resources of the common search space, the base station considers the resources of the common search space configured by the base station of the neighboring cell, so as to avoid the interference coordination of the common search space, for example, the adjacent cells may have their own common The resources of the search space are configured on different PRBs or PRB pairs to achieve the effect of frequency division multiplexing interference coordination.

In this embodiment, the Common Search Space (CSS) resource specifically refers to the time-frequency resource of the enhanced physical downlink control channel ePDCCH. The common search space refers to the search space that all UEs in a cell need to detect.

In this step, the base station configures the resources of the common search space for the UE to be sent to the UE by using a cell identifier, a physical broadcast channel, a PBCH, or the like.

Specifically, the base station notifies the resources of the public search space of the UE by using the relationship between the cell identifier and the PRB pair on the carrier. For example, the current carrier bandwidth is 1 ΟΜΗζ, and there are a total of 50 PRB pa ir. If the cell identifier detected by the UE during the cell search is 105, the UE may determine that the starting PRB pair of the common search space is labeled 105 mod 50. =5, that is, the starting position of the public search space is the PRB pair No. 5, assuming that the public search space occupies 4 PRB pairs, then one scheme is 5, 6, 7 and 8 and the four PRB pairs are the current cell/base station. Resources under the public search space. Of course, the present invention does not limit the manner in which other resources of the UE's public search space are notified.

The base station may send the resource for configuring the common search space to the UE by using the configuration information of the physical broadcast channel, and specifically, the configuration information such as the bit or the scrambling code that the resource information of the common search space is configured for the UE to be carried in the physical broadcast information may be configured. Medium

In addition, the base station may further carry the resource for configuring the common search space for the UE in the joint indication of the cell identifier and the physical broadcast channel that is sent to the UE, or the base station allocates the resource of the common search space for the UE to the UE through the ePDCCH. So that the UE acquires the eCSS resource by blindly detecting the ePDCCH in the eCSS.

Step 202: In the resource of the common search space, the base station sends a first ePDCCH, and does not send a CSI-RS, where the first ePDCCH is used to schedule a system message block SIB message, and a paging cancellation And at least one of a random access channel RACH response message;

In this step, the base station may have configured the CSI-RS resource to the UE, where the resource includes the subframe in which the CS I-RS configured for the UE is located; or the base station has not configured the CS I- to the UE. The resources of the RS, when the base station transmits the first ePDCCH, do not send the CSI-RS. It should be noted that, the CSI-RS is not sent here, and the information transmitted on the resource of the CSI-RS is a scheduling message included in the first ePDCCH, where the scheduling message includes scheduling the SIB message, and a scheduling office. Decoding a paging message and scheduling at least one of the RACH response messages. Since the common information of the first ePDCCH scheduling may be for the UE that has configured the CSI-RS and the UE that has not configured the CSI-RS, the configuration of the CSI-RS is not known at all for the UE that is not configured with the CSI-RS. Therefore, when the first ePDCCH is transmitted, the base station may not transmit the CSI-RS even if the UE detecting the first ePDCCH has been configured with the CSI-RS. In this way, the CSI-RS can be avoided when the UE detects public information such as at least one of the scheduling system message block SIB message, the paging message, and the random access channel RACH response message.

An embodiment of the present invention provides a method for processing a control channel, where a base station configures a resource of a common search space for a UE; in a resource of the common search space, the base station sends a first ePDCCH, and does not send a CSI-RS. The first ePDCCH is used to schedule at least one of a system message block S IB message, a paging message, and a random access channel RACH response message. The solution provided by this embodiment may be configured to enable a UE to receive, in a common search space resource, a first ePDCCH for scheduling at least one of a system message block SIB message, a paging message, and a random access channel RACH response message, There is no CS I-RS to avoid interference from CSI-RS.

Example 2

An embodiment of the present invention provides a method for processing a control channel, where the method is performed by a UE. As shown in FIG. 3, the method includes:

Step 301: The UE determines resources of a public search space.

In this embodiment, the common search space CSS resource specifically refers to the time-frequency resource of the enhanced physical downlink control channel ePDCCH. In the LTE-A system, the ePDCCH allocates resources in units of RB pa ir by resource blocks, and one RB pa ir occupies one subframe in the time domain and 12 OFDM subcarriers in the frequency domain. Carrier. A PRB pair set may be allocated to the ePDCCH, where the set may be understood as a resource occupied by the search space of the ePDCCH, so that the UE detects the ePDCCH in the search space, where the search space includes a UE-specific search space (UES). And a common search space, the common search space refers to a search space that all UEs in a cell need to detect, and the search space of the UE-specific search space pointer for a certain UE only carries control information for the UE.

In this step, the UE determines that the resources of the common search space of the ePDCCH can acquire the resources of the eCSS through the cell identifier and the physical broadcast channel PBCH.

Specifically, the UE may obtain the eCSS resource by using the relationship between the cell identifier and the PRB pair on the carrier. For example, the cell identifier is divided by the number of PRB pairs on the carrier to obtain a remainder, and the eCSS resource is obtained according to the remainder. For example, the current carrier bandwidth is 10 MHz, and there are a total of 50 PRB pairs. If the cell identifier detected by the UE during cell search is 105, the UE may determine that the starting PRB pair of the common search space has a label of 105 mod 50=5. That is, the starting position of the public search space is the PRB pair No. 5, assuming that the public search space occupies 4 PRB pairs, then one scheme is 5, 6, 7 and 8 and the four PRB pairs are the public under the current cell/base station. Search space resources;

Step 302: The UE acquires configuration information of a CSI-RS that is configured by the base station to the UE, where the configuration information includes resource information of the CSI-RS, where the resource information includes a child where the CSI-RS is located. frame;

Step 302 is an optional step. Specifically, the UE receives the RRC setup signaling sent by the base station and the CSI-RS configuration information configured for the self, so as to measure channel state information (CSI) and/or dry information according to the CSI-RS resource, The CSI-RS configuration resource includes a subframe in which the CSI-RS is located and a time-frequency resource in the subframe, and the channel information includes at least one of channel quality indication information, precoding matrix indication information, and channel rank indication information. Step 303: In a subframe where the CSI-RS is located, and in a resource of the common search space, the UE detects a first ePDCCH based on a hypothesis that the base station does not send a CSI-RS, where the first ePDCCH is used. Scheduling at least one of an SIB message, a paging message, and a random access channel RACH response message;

It should be noted that when there is no step 302, step 303 may be that, in the resource of the common search space, the UE detects the first ePDCCH based on the assumption that the base station does not send the CSI-RS, and the first ePDCCH is used. At least one of scheduling an SIB message, a paging message, and a random access channel RACH response message.

In this step, the scenario that the UE does not send the CSI-RS based on the base station includes the following: the information transmitted on the resource of the CSI-RS is a scheduling message included in the first ePDCCH, and the scheduling message includes scheduling the S IB And transmitting, by the message, scheduling the paging message and scheduling at least one of the RACH response messages. That is, the UE should assume that the base station sends the first ePDCCH in the common search space, and ignores the existence of the CSI-RS, that is, the rate matching after the first ePDCCH coding is performed when the CSI-RS does not exist, so that The resource location of the CSI-RS configured by the UE is directly mapped with the information of the first ePDCCH.

In this step, the UE may be configured with a CSI-RS by the base station, so the UE is in an RRC connected state. It should be noted that, in the common search space, when the base station sends the first ePDCCH, it is sent to multiple UEs. In this case, the connection status of each UE is different, that is, some UEs are in an RRC connection state, and some UEs are in an RRC connection state. The RRC is not connected, so the connection state of the UE may not be restricted in this embodiment. The RRC unconnected UE does not know the existence of the CSI-RS at all when receiving the first ePDCCH in the subframe, so the UE will detect the first ePDCCH based on the assumption that the base station does not send the CSI-RS; At the same time, the first ePDCCH is also possible for both the RRC connected state UE and the RRC unconnected state UE, and it can be concluded that, regardless of whether the base station sends the CSI-RS configured for the UE for the UE, the UE detects the first ePDCCH. Assume that the CSI-RS does not have a station to send. Since the public information such as the SIB message, the paging message, and the RACH response message may also be sent for the UE that is not in the RRC connected state and the UE in the RRC connected state, the UEs that are not in the RRC connected state detect the SIB message, At least one of the paging message and the RACH response message is configured to The interference caused by the CSI-RS of the connected UE is used. Therefore, the present embodiment assumes that there is no CSI-RS in the common search space resource in the received subframe, so as to detect common information, such as an SIB message and a paging message. And at least one of the RACH response messages is protected from CSI-RS.

Step 304: When the UE is in the RRC connection state, in the resource of the common search space, the UE bypasses the CSI-RS configured for the UE when the base station performs rate matching. Assume that the second ePDCCH is used to schedule information other than the SIB message, the paging message, and the RACH response message;

Wherein step 304 is an optional step. In this embodiment, the second ePDCCH refers to an ePDCCH of the format 3/3A. The ePDCCH in the format of 3/3A is used for group power control. When the ePDCCH of the format 3/3A is received, the UE has entered the RRC connection state. However, the UE bypasses the resources of the CSI-RS configured for the UE when the base station performs rate matching, so that the UE detects the second ePDCCH and bypasses the CSI-RS to avoid being affected by the CSI-RS.

In addition, the ePDCCH of the 3/3A format may be simultaneously sent by the base station to multiple UEs. For example, the ePDCCH of the format 3/3A may be sent to more than 20 UEs. In this case, if the CSI-RS is to be circumvented. The interference of these UEs needs to be configured with the same CSI-RS set, which brings a large CSI-RS configuration limitation, which violates the original intention of one UE to configure a specific CSI-RS. Therefore, when receiving the ePDCCH of the 3/3A format, the UE may also assume that the CSI-RS does not exist, and when detecting the ePDCCH of the format 3/3A, does not detect the CSI-RS to avoid receiving the CSI-RS. Impact.

The second ePDCCH may also be a dedicated ePDCCH for scheduling a certain UE, for example, a UE-specific ePDCCH for a certain UE, such as format 2, format 2C, format 4, etc., and these ePDCCHs are all for the UE in the connected state, so if The UE is configured with a CSI-RS resource, and the UE may bypass the CSI-RS when detecting the second ePDCCH, that is, when the base station performs rate matching, bypassing the resources of the CSI-RS configured for the UE. Assume that the second ePDCCH is detected.

In this embodiment, if it is always assumed that there is no CSI-RS in the common search space region of the ePDCCH, the channel state information and/or interference of the UE in the common search space region of the ePDCCH is always undetectable, so that the data is scheduled. There are adverse effects, so it is necessary to detect CSI information.

Since the scheduling SIB message is sent in the common search space of the ePDCCH, the paging message, the RACH ring The frequency of the message or the like is not 4 艮, and the UE may perform smoothing processing, that is, averaging, using the channel state information and/or interference measured by the CSI-RS of the plurality of PRB pa ir and/or the plurality of subframes, thus the CSI - The effect of RS measurements is small. For example, if the UE is receiving the ePDCCH of the scheduling SIB transmitted in the common search space of the ePDCCH, the base station does not send the CSI-RS in the common search space area at this time, since the ePDCCH is sent to multiple UEs, the other does not need to receive the S. The UE of the IB does not know that the ePDCCH for scheduling the SIB is sent here. Therefore, the UE performs CSI measurement, but the measurement resource used at this time is not the resource occupied by the CSI-RS. Although the measured CS I is deviated at this time, the measurement result for CSI is the average of the multiple CSI measurement results, so the influence on the CS I-RS measurement is small.

Therefore, in this embodiment, when the detected second ePDCCH is used to schedule information other than the SIB message, the paging message, and the RACH response message, the UE may be in the CSI-RS resource. The CSI-RS is used for measurement of channel information and/or interference information. That is, if the UE does not currently detect the first ePDCCH, the UE may perform measurement using the CSI-RS on the subframe, even if the base station schedules the first ePDCCH to other UEs on the resource.

Step 305: When the resource of the common search space is in a part of a subframe, the UE uses the CS I-RS outside the common search space to measure channel information and/or interference information, and based on the The base station does not send the CSI-RS, and detects the first ePDCCH and/or the second ePDCCH in the resources of the common search space, where the second ePDCCH is used to schedule the SIB message, Information other than the paging message and the RACH response message.

Step 305 is an optional step. When the resources of the common search space are in a part of the subframe, the subframes of the resources configured with the CSI-RS may be different from the subframes of the common search space, so that the first ePDCCH and/or may be detected in the resources of the common search space. In the second ePDCCH, interference from the CSI-RS is avoided; in addition, the CSI-RS outside the common search space may be used to measure channel information and/or interference information to facilitate data scheduling.

It should be noted that step 305 and step 303 and step 304 are parallel schemes. Step 303 and step 304 are a method for processing a control channel when the UE has been configured with a CS I-RS and the resources of the common search space are in all subframes, and step 305 is that the UE has been configured with the CS I-RS. And the processing method of the control channel when the resources of the common search space are in a partial subframe. The present embodiment provides a method for processing a control channel. When the UE is configured with a CSI-RS in the common search space of the ePDCCH, the UE assumes that there is no CSI-RS in the subframe when receiving the ePDCCH, that is, If the CSI measurement is not performed, the interference of the CSI-RS may be avoided when detecting at least one of the SIB message, the paging message, and the RACH response message. In addition, when the UE does not receive the public information, the CSI measurement can be performed according to the CSI-RS configured by the base station for the UE, so that the CSI measurement in the common search space region of the ePDCCH is not greatly affected.

The embodiment of the present invention provides another method for processing a control channel, where the execution body of the method is a base station. As shown in FIG. 4, the method includes:

Step 401: The base station configures a resource of a common search space for the user equipment UE.

In this embodiment, the common search space CSS resource specifically refers to the time-frequency resource of the enhanced physical downlink control channel ePDCCH. In the LTE-A system, the ePDCCH allocates resources in units of resource blocks to RB pairs. One RB pair occupies one subframe in the time domain and 12 OFDM subcarriers in the frequency domain. A physical resource block PRBpair set may be allocated for the ePDCCH, and the set may be understood as a search space of the ePDCCH, so that the UE detects the ePDCCH in the search space, where the search space includes a UE-specific search space (UES) and a public The search space, the common search space refers to the search space that all UEs in a cell need to detect, and the search space of a specific search space pointer for a certain UE only carries control information for the UE.

Specifically, the base station may notify the resources of the public search space of the UE by using the relationship between the cell identifier and the PRB pair on the carrier. For example, the current carrier bandwidth is 10 MHz, and there are a total of 50 PRB pairs. If the cell identifier detected by the UE during cell search is 105, the UE can determine that the starting PRB pair of the common search space is 105 mod 50=5. , ie the starting position of the public search space is number 5 PRB pair, assuming that the public search space occupies 4 PRB pairs, then one of the four PRB pairs is 5, 6, 7 and 8 is the resource of the common search space under the current cell/base station. Of course, the present invention does not limit other ways of notifying the resources of the UE common search space;

Step 402: The base station configures a CSI-RS resource for the UE, where the resource includes a subframe in which the CSI-RS configured for the UE is located.

Wherein step 402 is an optional step. The base station allocates CSI-RS resources for the UE, and the base station can allocate different CSI-RSs for different UEs, so that the UE is used to measure CSI. Specifically, the base station may configure the CSI-RS of the UE of the current cell according to the CSI-RS configuration of the neighboring cell UE, so that the resources of the CSI-RS of the neighboring cell are not conflicted as much as possible, that is, the CSI-RS resource location is as close as possible to the neighboring cell. The resources of the PDSCH are in conflict. Specifically, the local cell is used as the CSI-RS for measuring the channel state, and the PDSCH corresponding to the location of the neighboring cell is as quiet as possible; the cell is used as the CSI-RS for interference measurement, and the PDSCH corresponding to the location of the neighboring cell is not silenced as much as possible. Other principles for configuring CSI-RS resources are not excluded.

The CSI-RS resource configured by the base station for the UE may be sent to the UE through the radio resource control RRC setup signaling, so that the UE learns the CSI-RS resource configured by the base station after entering the RRC connection state.

Step 403: In a subframe where the CSI-RS is located, and in a resource of the common search space, the base station sends a first ePDCCH, and does not send a CSI-RS, where the first ePDCCH is used in a scheduling system. At least one of a message block SIB message, a paging message, and a random access channel RACH response message;

It should be noted that when there is no step 402, step 403 may be in the public search. In the resource of the space, the base station sends the first ePDCCH, and does not send the CSI-RS, where the first ePDCCH is used to schedule at least one of a system message block SIB message, a paging message, and a random access channel RACH response message. Message.

In this step, the base station configures the CSI-RS for the UE, and does not send the CSI-RS configured for the UE when the first ePDCCH is sent, so that the UE detects the system message block SIB message when detecting the first ePDCCH. At least one of a paging message and a random access channel RACH response message is protected from interference by the CSI-RS.

It should be noted that, the CSI-RS is not transmitted here, and the information that is transmitted on the resource of the CSI-RS is the scheduling message that is included in the first ePDCCH, where the scheduling message includes scheduling the SIB message, and the scheduling office. Decoding a paging message and scheduling at least one of the RACH response messages.

When the CSI-RS is not sent by the UE when the first ePDCCH is sent by the eNodeB, the following conditions are not included: When the base station performs rate matching, the resources of the CSI-RS configured for the UE are bypassed.

Step 404: In a subframe where the CS I-RS is located, and in a resource of the common search space, when the base station performs rate matching, bypassing resources of the CSI-RS configured for the UE, And transmitting, by the UE, the second ePDCCH, where the second ePDCCH is configured to schedule information other than the SIB message, the paging message, and the RACH response message.

Wherein step 404 is an optional step. In this embodiment, the second ePDCCH refers to an ePDCCH in a format of 3/3A. The ePDCCH in the format of 3/3A is used for group power control.

Rate matching means that bits on the transport channel are retransmitted or punctured to match the bearer capabilities of the physical control channel to achieve the bit rate required for the transport format during channel mapping. Specifically, the CSI-RS resources configured for the UE are not mapped in the channel mapping, so that the resources after the channel mapping do not include the CSI-RS resources; Mapping, the resources of the CSI-RS configured by the UE are mapped, and after the mapping is completed, the resources of the included CSI-RS are punctured by means of puncturing. The resource of the CS I-RS configured for the UE is not included in the second ePDCCH that is sent to the UE, so that the UE avoids interference from the CSI-RS when detecting the second ePDCCH.

Step 405: When resources of the common search space are in a part of a subframe, and the part is When the frame includes the subframe in which the CSI-RS of the UE is located, the base station sends the first ePDCCH and/or the second ePDCCH to the UE in a subframe in which the CSI-RS is located, and does not Sending the CSI-RS;

Wherein, step 405 is an optional step. When the resources of the common search space are in a part of the subframe, the subframes of the resources configured with the CSI-RS may be different from the subframes of the common search space, so that the first ePDCCH and/or may be detected in the resources of the common search space. In the second ePDCCH, interference from the CSI-RS is avoided; in addition, the CSI-RS outside the common search space may be used to measure channel information and/or interference information to facilitate data scheduling.

It should be noted that step 405 and step 403 and step 404 are parallel schemes. Step 403 and step 404 are a method for processing a control channel when the UE has been configured with a CSI-RS, and the resources of the common search space are in all subframes, and step 405 is that the UE has been configured with the CSI-RS, and The processing method of the control channel when the resources of the common search space are in a partial subframe.

An embodiment of the present invention provides a method for processing a control channel, where a base station configures a resource of a common search space for a UE; in a resource of the common search space, the base station sends a first ePDCCH, and does not send a CSI-RS. The first ePDCCH is used to schedule at least one of a system message block SIB message, a paging message, and a random access channel RACH response message. The solution provided by this embodiment may be configured to enable a UE to receive, in a common search space resource, a first ePDCCH for scheduling at least one of a system message block SIB message, a paging message, and a random access channel RACH response message, There is no CSI-RS to avoid interference from CSI-RS.

Example 3

The embodiment of the present invention provides a user equipment, as shown in FIG. 5, the user equipment includes: a determining unit 501, a first detecting unit 502;

a determining unit 501, configured to determine resources of a common search space; The common search space CSS resource specifically refers to the time-frequency resource of the enhanced physical downlink control channel ePDCCH. The common search space refers to a search space that all UEs in a cell need to detect. In addition, the search space further includes a UE-specific search space. The search space of the UE-specific search space pointer for a certain UE only carries control information for the UE. .

Further, the determining unit 501 can acquire the resources of the enhanced eCSS by using the cell identifier and the physical broadcast channel PBCH. Specifically, the determining unit 501 may obtain the eCSS resource by using the relationship between the cell identifier and the PRB pa ir on the carrier, for example, the cell identifier is divided by the number of PRB pa irs on the carrier to obtain a remainder, and the obtained remainder is the resource for acquiring the eCSS; The 501 may obtain the resource of the eCSS by using the configuration information of the physical broadcast channel. Specifically, the resource of the eCSS on the current carrier is obtained by reading the configuration information such as the bit or the scrambling code in the physical broadcast information. In addition, the determining unit 501 may further The joint indication of the cell identifier and the physical broadcast channel acquires the resource of the eCSS; or may also obtain the eCSS resource or the like by blindly detecting the ePDCCH in the eCSS.

The first detecting unit 502 is configured to detect, according to a hypothesis that the base station does not send the channel state information reference signal CS I-RS, in the resource of the common search space, the first enhanced physical downlink control channel ePDCCH, the first ePDCCH And a method for scheduling at least one of a system message block S IB message, a paging message, and a random access channel RACH response message.

The user equipment is configured with the CS I-RS; or the user equipment is not configured with the CS I-RS. Or, it can be said that there is a CS I-RS in the common search space of the ePDCCH; or, there is no CS I-RS in the common search space of the ePDCCH, and when the first detecting unit 502 detects the first ePDCCH, it is assumed that CS I - The RS is not transmitted by the base station, and the CS I-RS is not detected to detect at least one of public information, such as a SIP message, a paging message, and a RACH response message, from being affected by the CS I-RS.

The assumption that the base station does not transmit the channel state information reference signal CS I-RS includes the following: the information transmitted on the resource of the CS I-RS is a scheduling message included in the first ePDCCH, and the scheduling message includes a scheduling station. Determining at least one of the S IB message, scheduling the paging message, and scheduling the RACH response message.

Further, as shown in FIG. 6, the user equipment further includes: an obtaining unit 503; The obtaining unit 503 is configured to acquire configuration information of a CSI-RS that is configured by the base station to the user equipment, where the configuration information includes resource information of the CSI-RS, where the resource information includes where the CSI-RS is located. Subframe

When the base station configures the CSI-RS resource for the user equipment, the first detecting unit 502 is specifically configured to be used in the subframe where the CSI-RS is located, and in the resources of the common search space. The base station does not transmit the CSI-RS hypothesis, and detects the first ePDCCH.

Further, the user equipment further includes: a second detecting unit 504;

The second detecting unit 504 is configured to: in the resource of the common search space, detect the second ePDCCH based on the resource of the CSI-RS configured for the user equipment when the base station performs rate matching. The second ePDCCH is configured to schedule information other than the SIB message, the paging message, and the RACH response message.

The second ePDCCH is an ePDCCH of the format 3/3A; wherein the ePDCCH of the format 3/3A is used for group power control.

When the ePDCCH of the 3/3A format is received, the user equipment has entered the RRC connection state. At this time, the user equipment has configured the CSI-RS, that is, the CSI-RS exists in the common search space of the ePDCCH.

The ePDCCH of the format 3/3A can be simultaneously sent by the base station to multiple UEs, that is, the user equipment in this embodiment. For example, the ePDCCH of the format 3/3A can be sent to more than 20 UEs. To avoid the interference of CSI-RS, these UEs need to be configured with the same CSI-RS set. This will bring a large CSI-RS configuration limit, which violates the original intention of a UE to configure a specific CSI-RS. Therefore, when the ePDCCH of the 3/3A format is received, the UE may also assume that the CSI-RS does not exist, and when detecting the ePDCCH of the format 3/3A, the CSI in the subframe is not detected. RS, to avoid being affected by CSI-RS.

Further, the user equipment further includes a third detecting unit 505;

When the second ePDCCH is used to schedule information other than the at least one of the SIB message, the paging message, and the RACH response message, the third detecting unit 505 is configured to: in the CSI-RS The CSI-RS is used to measure channel information and/or interference information. Further, the user equipment further includes a fourth detecting unit 506. The fourth detecting unit 506 is configured to: when the resources of the common search space are in a part of the subframe, adopt the CS outside the common search space. The I-RS performs measurement of channel information and/or interference information, and detects the first ePDCCH and/or the second in the resources of the common search space based on the assumption that the base station does not send the CS I-RS ePDCCH, the second ePDCCH is configured to schedule information other than the S IB message, the paging message, and the RACH response message.

When the resources of the common search space are in a part of the subframe, the subframe in which the resources of the CS I-RS are configured may be different from the subframe in the common search space, so that the first ePDCCH and/or may be detected in the resources of the common search space. Or the second ePDCCH, avoid interference by the CS I-RS; in addition, the CS I-RS outside the common search space may be used to measure channel information and/or interference information to facilitate data scheduling.

An embodiment of the present invention provides a user equipment, where a resource of a common search space is determined by a determining unit. In a resource of the common search space, a first detecting unit is based on a hypothesis that a base station does not send a channel state information reference signal CS I-RS. Detecting a first enhanced physical downlink control channel, ePDCCH, where the first ePDCCH is used to schedule at least one of a system message block S IB message, a paging message, and a random access channel RACH response message. The solution provided by the embodiment of the present invention, when the apparatus receives the ePDCCH, does not have a CS I-RS in the subframe, and may detect at least one of the SIB message, the paging message, and the RACH response message when detecting the public information. When avoiding messages, avoid interference from CS I-RS.

The embodiment of the present invention provides another receiving device for the control channel, and the device may be a user equipment UE. As shown in FIG. 7, the device includes: a processor 701;

The processor 701 is configured to determine resources of a common search space;

The public search space resource specifically refers to the time-frequency resource in the enhanced public search space. The common search space refers to a search space that all UEs in a cell need to detect. In addition, the search space further includes a UE-specific search space. The search space of the UE-specific search space pointer for a certain UE only carries control information for the UE. .

Further, the processor 701 can obtain the increase by using the cell identifier and the physical broadcast channel PBCH. Strong eCSS resources. Specifically, the processor 701 may obtain the eCSS resource by using the relationship between the cell identifier and the PRB pa ir on the carrier, for example, the cell identifier is divided by the number of PRB pa irs on the carrier to obtain a remainder, and the obtained remainder is the resource for acquiring the eCSS; The 701 may acquire the resource of the eCSS by using the configuration information of the physical broadcast channel. Specifically, the resource of the eCSS on the current carrier is obtained by reading configuration information such as a bit or a scrambling code in the physical broadcast information. In addition, the processor 701 may also use the foregoing. The joint indication of the cell identifier and the physical broadcast channel acquires the resource of the eCSS; or may also obtain the eCSS resource or the like by blindly detecting the ePDCCH in the eCSS.

The processor 701 is further configured to: in the resource of the common search space, detect, according to a hypothesis that the base station does not send the channel state information reference signal CSI-RS, the first enhanced physical downlink control channel ePDCCH, the first ePDCCH And a method for scheduling at least one of a system message block S IB message, a paging message, and a random access channel RACH response message.

The device is configured with the CSI-RS; or the device is not configured with the CSI-RS. Or, it can be said that the CSI-RS exists in the common search space of the ePDCCH; or, the CSI-RS does not exist in the common search space of the ePDCCH, and the CSI-RS is assumed when the first detecting unit 502 detects the first ePDCCH. It is not transmitted by the base station, and does not detect the CSI-RS to avoid being affected by the CSI-RS in detecting at least one of public information, such as an SIB message, a paging message, and a RACH response message.

The assumption that the base station does not transmit the channel state information reference signal CSI-RS includes the following: the information transmitted on the resource of the CS I-RS is a scheduling message included in the first ePDCCH, and the scheduling message includes scheduling The SIB message, scheduling the paging message, and scheduling at least one of the RACH response messages.

Further, the processor 701 is further configured to acquire configuration information of a CSI-RS that is configured by the base station to the device, where the configuration information includes resource information of the CSI-RS, and the resource information includes the CSI - the subframe in which the RS is located;

At this time, in the subframe where the CSI-RS is located, and in the resource of the common search space, the processor 701 detects the first ePDCCH when the CSI-RS is not transmitted by the base station.

Further, the processor 701 is further configured to: in a resource of the common search space, a base Detecting, by the base station, the resource of the CSI-RS configured for the UE when performing rate matching, detecting the second ePDCCH, where the second ePDCCH is used to schedule the SIB message, the paging Messages and information other than the RACH response message.

The second ePDCCH includes an ePDCCH of the format 3/3A; wherein the ePDCCH of the format 3/3A is used for group power control.

When the ePDCCH of the 3/3A format is received, it indicates that the UE has entered the RRC connection state. At this time, the device has been configured with the CSI-RS by the base station, that is, the CSI-RS exists in the common search space of the ePDCCH.

The ePDCCH of the format 3/3A can be simultaneously sent by the base station to multiple UEs, that is, the device in this embodiment, for example, the ePDCCH of the format 3/3A can be sent to more than 20 UEs. For CSI-RS interference, these UEs need to be configured with the same CSI-RS set, which will bring a large CSI-RS configuration limitation, which violates the original intention of one UE to configure a specific CSI-RS. Therefore, when the UE receives the ePDCCH of the 3/3A format, the UE may also assume that the CSI-RS does not exist, and when detecting the ePDCCH of the format 3/3A, the CSI in the subframe is not detected. RS, to avoid being affected by CSI-RS.

Further, when the second ePDCCH is used to schedule information other than the at least one of the SIB message, the paging message, and the RACH response message, the processor 701 is configured to: The CSI-RS is used to measure channel information and/or interference information on the resources of the CSI-RS.

Further, when the resources of the common search space are in a part of the subframe, the processor 701 performs channel information and/or interference information measurement by using the CSI-RS outside the common search space, and is based on The base station does not send the CSI-RS, and detects the first ePDCCH and/or the second ePDCCH in the resources of the common search space, where the second ePDCCH is used to schedule the SIB message and the Information other than the paging message and the RACH response message.

When the resources of the common search space are in a part of the subframe, the subframes of the resources configured with the CSI-RS may be different from the subframes of the common search space, so that the first ePDCCH and/or may be detected in the resources of the common search space. In the second ePDCCH, the interference of the CSI-RS is avoided; in addition, the CSI-RS outside the common search space may be used to measure channel information and/or interference information, so as to facilitate For data scheduling.

An embodiment of the present invention provides a processing device for controlling a channel, where the resource of the common search space is determined by the processor, and the resource of the common search space is detected based on a hypothesis that the base station does not send the channel state information reference signal CSI-RS. a first enhanced physical downlink control channel ePDCCH, where the first ePDCCH is used to schedule at least one of a system message block S IB message, a paging message, and a random access channel RACH response message. The solution provided by the embodiment of the present invention, when the device receives the ePDCCH, does not have a CS I -RS in the subframe, and may detect at least one of the SIB message, the paging message, and the RACH response message when detecting the public information. When avoiding messages, avoid interference from CSI-RS.

The embodiment provides a base station, as shown in FIG. 8, the device includes: a configuration unit 801, a first sending unit 802;

a configuration unit 801, configured to configure, for the UE, a resource of a common search space;

Specifically, when configuring the resources of the common search space, the base station considers the resources of the common search space configured by the base station of the neighboring cell, so as to avoid the interference coordination of the common search space, for example, the adjacent cells may have their own common The resources of the search space are configured on different PRBs or PRBs, and the effect of frequency division multiplexing interference coordination is achieved.

In the resource of the common search space, the first sending unit 802 is configured to send the first ePDCCH, and does not send a CSI-RS, where the first ePDCCH is used to schedule a system message block S IB message, a paging message, and a random Accessing at least one of the channel RACH response messages.

The method of not transmitting the CSI-RS includes the following: the information transmitted on the resource of the CSI-RS is a scheduling message included in the first ePDCCH, where the scheduling message includes scheduling the SIB message, and scheduling the paging message. And scheduling at least one of the RACH response messages.

Further, the configuration unit 801 is further configured to configure, for the UE, a resource of a CSI-RS, where the resource includes a subframe in which the CSI-RS configured for the UE is located;

In the subframe in which the CSI-RS is located, and in the resources of the common search space, the first sending unit 802 sends a first ePDCCH, and does not send the CS I-RS, so that the UE detects When at least one of public information, such as an S IB message, a paging message, and a RACH response message, Further, as shown in FIG. 9, the base station further includes: a second sending unit 803;

The second sending unit 803 is configured to bypass the CSI-RS configured for the UE when performing rate matching in the subframe where the CSI-RS is located, and in the resources of the common search space. a resource, the second ePDCCH is sent to the UE, where the second ePDCCH is used to schedule information other than the SIB message, the paging message, and the RACH response message;

The second ePDCCH refers to an ePDCCH in the format of 3/3A. The ePDCCH in the format of 3/3A is used for group power control.

Rate matching means that bits on the transport channel are retransmitted or punctured to match the bearer capabilities of the physical control channel to achieve the bit rate required for the transport format during channel mapping. Specifically, the CSI-RS resources configured for the UE are not mapped in the channel mapping, so that the resources after the channel mapping do not include the CSI-RS resources; Mapping, the resources of the CSI-RS configured by the UE are mapped, and after the mapping is completed, the resources of the included CSI-RS are punctured by means of puncturing. The resource of the CSI-RS configured for the UE is not included in the second ePDCCH that is sent to the UE, so that the UE avoids interference from the CSI-RS when detecting the second ePDCCH.

Further, as shown in FIG. 9, the base station further includes: a third sending unit 804;

a third sending unit 804, configured to: when the resource of the common search space is in a part of a subframe, and the part of the subframe includes a subframe in which the CSI-RS of the UE is located, in the CSI-RS Transmitting, in the subframe, the first ePDCCH and/or the second ePDCCH to the UE, and not sending the CSI-RS;

An embodiment of the present invention provides a base station, where a resource of a common search space is configured for a UE by using a configuration unit; in a resource of the common search space, a first sending unit sends a first ePDCCH, and Transmitting a CSI-RS, where the first ePDCCH is used to schedule at least one of a system message block SIB message, a paging message, and a random access channel RACH response message, so that when the UE detects public information, such as an SIB message, paging Avoid interference from CS I -RS when at least one of the message and the RACH response message.

The embodiment of the present invention provides a processing device for a control channel, which may be a base station, as shown in FIG. 10, the device includes: a processor 1001, a transmitter 1002;

The processor 1001 is configured to configure, for the UE, a resource of a common search space;

Specifically, when configuring the resources of the common search space, the processor 1001 in the base station considers the resources of the common search space configured by the base station of the neighboring cell, so as to avoid the interference coordination of the common search space, such as the adjacent cell. The resources of the respective common search spaces can be configured on different PRBs or PRBs, to achieve the effect of frequency division multiplexing interference coordination.

The transmitter 1002 is configured to send, in a resource of the common search space, a first ePDCCH, and not send a CS I-RS, where the first ePDCCH is used to schedule a system message block SIB message, a paging message, and a random access. At least one of the channel RACH response messages.

Further, the processor 1001 is further configured to: configure a CSI-RS resource for the UE, where the resource includes a subframe in which the CSI-RS configured for the UE is located;

In the subframe in which the CSI-RS is located, and in the resource of the common search space, the transmitter 1001 is specifically configured to send the first ePDCCH, and not send the CSI-RS.

Further, the transmitter 1001 is further configured to: circumvent the configuration configured for the UE in the subframe where the CSI-RS is located, and in the resource of the common search space, when performing rate matching The CSI-RS resource is configured to send the second ePDCCH to the UE, where the second ePDCCH is used to schedule information other than the SIB message, the paging message, and the RACH response message.

The second ePDCCH refers to an ePDCCH with a format of 3/3A. The ePDCCH in the format of 3/3A is used for group power control. Rate matching means that bits on the transport channel are retransmitted or punctured to match the bearer capabilities of the physical control channel to achieve the bit rate required for the transport format during channel mapping. Specifically, the CSI-RS resources configured for the UE are not mapped in the channel mapping, so that the resources after the channel mapping do not include the CSI-RS resources; Mapping, the resources of the CSI-RS configured by the UE are mapped, and after the mapping is completed, the resources of the included CSI-RS are punctured by means of puncturing. The resource of the CS I-RS configured for the UE is not included in the second ePDCCH that is sent to the UE, so that the UE avoids interference of the CSI-RS when detecting the second ePDCCH.

Further, the transmitter 1001 is further configured to:

The second ePDCCH is configured to schedule information except the S IB message, the paging message, and the RACH response message, where the information transmitted on the CSI-RS resource is the first ePDCCH. And/or a scheduling message included in the second ePDCCH, where the scheduling message includes scheduling at least one of the SIB message, scheduling the paging message, and scheduling the RACH response message.

An embodiment of the present invention provides a processing device for a control channel, where a processor configures a resource of a common search space for a UE; in a resource of the common search space, a transmitter sends a first ePDCCH, and does not send a CSI-RS. The first ePDCCH is used to schedule at least one of a system message block S IB message, a paging message, and a random access channel RACH response message, so that the UE detects public information, such as a SIP message, a paging message, and a RACH response. When at least one message in the message is avoided, it is avoided by the CSI-RS.

It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as the cells may or may not be physical. Units can be located in one place, or they can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. A person of ordinary skill in the art does not pay creative work. Underneath, it can be understood and implemented.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, dedicated hardware, dedicated CPU, dedicated memory, dedicated memory, Special components are used to achieve this, but in the case of more than 4, the former is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. , U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Acces s Memory), disk or optical disk, etc., including a number of instructions to make a computer device (can It is a personal computer, a server, or a network device, etc.) that performs the methods described in various embodiments of the present invention.

The various embodiments in the specification are described in a progressive manner, and the same or similar parts of the various embodiments may be referred to each other, and each embodiment focuses on differences from other embodiments. In particular, for the device and system embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiments.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

claims

1. A control channel processing method, characterized by including:

The user equipment UE determines the resources of the public search space;

In the resources of the common search space, the UE detects the first enhanced physical downlink control channel ePDCCH based on the fact that the base station does not send the channel state information reference signal CSI-RS, and the first ePDCCH is used for scheduling system messages. At least one of a block SIB message, a paging message and a random access channel RACH response message.

2. The method according to claim 1, characterized in that, in the resources of the common search space, before the UE detects the first ePDCCH based on the assumption that the base station does not send CSI-RS, the UE further includes: the UE Obtain configuration information of CSI-RS configured by the base station for the UE, where the configuration information includes resource information of the CSI-RS, and the resource information includes the subframe in which the CSI-RS is located.

3. The method according to claim 2, characterized in that, in the resources of the common search space, the UE detects the first ePDCCH based on the assumption that the base station does not send CSI-RS, including: in the In the subframe where the CSI-RS is located and in the resources of the common search space, the UE detects the first ePDCCH based on the assumption that the base station does not send the CSI-RS.

4. The method according to claim 3, wherein the UE is based on the assumption that the base station does not send CSI-RS, including:

The information transmitted on the CSI-RS resource is a scheduling message included in the first ePDCCH. The scheduling message includes at least one of scheduling the SIB message, scheduling the paging message and scheduling the RACH response message. kind of scheduling message.

5. The method according to any one of claims 2 to 4, characterized in that, the method further includes: in the resources of the common search space, the UE bypasses the base station when performing rate matching based on the base station. Open the configuration of the CSI-RS resources configured for the UE, detect the second ePDCCH, and the second ePDCCH is used to schedule the SIB message, the paging message and the RACH Information other than the response message.

6. The method according to claim 5, characterized in that, the method further includes: the UE uses the CSI-RS on the CSI-RS resource to measure channel information and/or interference information. .

7. The method according to claim 2, characterized in that, the method further includes: when the resources of the common search space are in a part of subframes, the UE uses the resource outside the common search space. CSI-RS measures channel information and/or interference information, and based on the assumption that the base station does not send the CSI-RS, detects the first ePDCCH and/or the second ePDCCH in the resources of the common search space, The second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message.

8. A control channel processing method, characterized by including:

The base station configures the resources of the public search space for the UE;

In the resources of the common search space, the base station sends the first ePDCCH and does not send CSI-RS. The first ePDCCH is used to schedule at least one of a SIB message, a paging message and a RACH response message.

9. The method according to claim 8, characterized in that, in the resources of the common search space, before the base station sends the first ePDCCH and does not send the CSI-RS, it also includes:

The base station configures CSI-RS resources for the UE, and the resources include the subframe in which the CSI-RS configured for the UE is located.

10. The method according to claim 9, characterized in that, in the resources of the common search space, the base station sends the first ePDCCH and does not send the CSI-RS including:

In the subframe where the CSI-RS is located and in the resources of the common search space, the base station sends the first ePDCCH and does not send the CSI-RS.

11. The method according to any one of claims 8-10, characterized in that, the information transmitted on the CSI-RS resource is a scheduling message included in the first ePDCCH, and the scheduling message includes scheduling at least one of the SIB message, scheduling the paging message and scheduling the RACH response message.

12. The method according to any one of claims 8-11, characterized in that the method further includes:

In the subframe where the CSI-RS is located, and in the resources of the common search space, the base station bypasses the resources of the CSI-RS configured for the UE when performing rate matching, Send to the UE The second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message.

13. The method according to claim 8, characterized in that, the method further includes: when the resources of the common search space are in a part of subframes, and the part of the subframes includes the CSI- When the subframe where the CSI-RS is located, the base station sends the first ePDCCH and/or the second ePDCCH to the UE in the subframe where the CSI-RS is located, and does not send the CSI-RS;

Wherein, the second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message, and the information transmitted on the CSI-RS resource is the first ePDCCH and/or a scheduling message included in the second ePDCCH, where the scheduling message includes at least one of scheduling the SIB message, scheduling the paging message, and scheduling the RACH response message.

14. A user equipment, characterized by: including:

Determination unit, used to determine the resources of the public search space;

The first detection unit is configured to detect the first ePDCCH in the resources of the common search space based on the assumption that the base station does not send CSI-RS. The first ePDCCH is used to schedule SIB messages, paging messages and RACH response messages. at least one message in .

15. The user equipment according to claim 14, characterized in that, the user equipment further includes: an obtaining unit, configured to obtain the configuration information of the CSI-RS configured by the base station to the user equipment, the configuration information The resource information includes the CSI-RS, and the resource information includes the subframe in which the CSI-RS is located.

16. The user equipment according to claim 15, characterized in that the first detection unit is used for:

In the subframe where the CSI-RS is located and in the resources of the common search space, the first ePDCCH is detected based on the assumption that the base station does not send the CSI-RS.

17. The user equipment according to claim 16, characterized in that, the information transmitted on the CSI-RS resource is a scheduling message included in the first ePDCCH, and the scheduling message includes scheduling the SIB message, scheduling Scheduling at least one of the paging message and the RACH response message.

18. The user equipment according to any one of claims 15-17, characterized in that: the user Household equipment also includes:

A second detection unit configured to detect the second ePDCCH in the resources of the common search space based on the base station bypassing the CSI-RS resources configured for the user equipment when performing rate matching, The second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message.

19. The user equipment according to claim 18, characterized in that, the user equipment further includes: a third detection unit, configured to use the CSI-RS on the CSI-RS resource to perform channel information and /or interfere with the measurement of information.

20. The user equipment according to claim 15, characterized in that, the user equipment further includes: a fourth detection unit, configured to use the common search when the resources of the common search space are in a part of subframes. The CSI-RS outside the space measures channel information and/or interference information, and based on the assumption that the base station does not send the CSI-RS, detects the first ePDCCH and/or in the resources of the common search space. The second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message.

21. A control channel processing device, characterized in that it includes:

Processor, used to determine the resources of the public search space;

And in the resources of the common search space, based on the assumption that the base station does not send CSI-RS, detecting the first ePDCCH, the first ePDCCH is used to schedule at least one of the SIB message, the paging message and the RACH response message. .

22. The device according to claim 21, characterized in that,

The processor is further configured to obtain the configuration information of the CSI-RS configured by the base station to the device. The configuration information includes the resource information of the CSI-RS, and the resource information includes the location of the CSI-RS. subframe.

23. The apparatus according to claim 22, wherein the processor is specifically configured to: in the subframe where the CSI-RS is located and in the resources of the common search space, based on the base station not sending The hypothesis of the CSI-RS is to detect the first ePDCCH.

24. The device according to claim 23, characterized in that: the resource upload of the CSI-RS The input information is a scheduling message included in the first ePDCCH, and the scheduling message includes at least one of scheduling the SIB message, scheduling the paging message, and scheduling the RACH response message.

25. The device according to any one of claims 22-24, characterized in that the processor is also used for:

In the resources of the common search space, based on the base station bypassing the CSI-RS resources configured for the UE when performing rate matching, the second ePDCCH is detected, and the second ePDCCH is used for Information other than the SIB message, the paging message and the RACH response message is scheduled.

26. The apparatus according to claim 25, wherein the processor is further configured to use the CSI-RS on the CSI-RS resource to measure channel information and/or interference information. .

27. The apparatus according to claim 22, wherein the processor is further configured to: when the resources of the common search space are in a part of subframes, use the CS outside the common search space. The I-RS measures channel information and/or interference information, and based on the assumption that the base station does not send the CSI-RS, detects the first ePDCCH and/or the second ePDCCH in the resources of the common search space. ePDCCH, the second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message.

28. A base station, characterized by including:

Configuration unit, used to configure public search space resources for the UE;

The first sending unit is configured to send the first ePDCCH in the resources of the common search space without sending CSI-RS. The first ePDCCH is used for scheduling SIB messages, paging messages and RACH response messages. at least one message.

29. The base station according to claim 28, characterized in that,

The configuration unit is also configured to configure CSI-RS resources for the UE, where the resources include the subframe in which the CSI-RS configured for the UE is located.

30. The base station according to claim 29, characterized in that the first sending unit is specifically used to:

In the subframe where the CSI-RS is located and in the resources of the common search space, the first ePDCCH is sent, and the CSI-RS is not sent.

31. The base station according to any one of claims 28 to 30, characterized in that, the information transmitted on the CSI-RS resource is a scheduling message included in the first ePDCCH, and the scheduling message includes scheduling at least one scheduling message among the SIB message, scheduling the paging message and scheduling the RACH response message.

32. The base station according to any one of claims 28-31, characterized in that, the base station further includes:

The second sending unit is configured to bypass the CSI-RS configured for the UE when performing rate matching in the subframe where the CSI-RS is located and in the resources of the common search space. The resource of the RS is used to send the second ePDCCH to the UE, where the second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message.

33. The base station according to claim 28, characterized in that, the base station further includes: a third sending unit, configured to: when the resources of the common search space are in a part of the subframes, and the part of the subframes includes all When the subframe where the CSI-RS of the UE is located, send the first ePDCCH and/or the second ePDCCH to the UE in the subframe where the CSI-RS is located, and do not send the CS I-RS; wherein, the second ePDCCH is used to schedule information other than the S IB message, the paging message and the RACH response message, and the information transmitted on the resource of the CSI-RS is The first ePDCCH and/or the second ePDCCH includes a scheduling message, and the scheduling message includes at least one of scheduling the SIB message, scheduling the paging message, and scheduling the RACH response message.

34. A control channel processing device, characterized in that it includes:

The processor is used to configure the resources of the public search space for the UE;

The transmitter is configured to send a first ePDCCH in the resources of the common search space without sending CSI-RS, and the first ePDCCH is used to schedule at least one of the SIB message, the paging message and the RACH response message. A message.

35. The apparatus according to claim 34, wherein the processor is further configured to: configure CSI-RS resources for the UE, where the resources include the CSI-RS configured for the UE. The subframe where the RS is located.

36. The device according to claim 35, characterized in that the transmitter is specifically used for: In the subframe where the CSI-RS is located and in the resources of the common search space, the first ePDCCH is sent, and the CSI-RS is not sent.

37. The apparatus according to any one of claims 34 to 36, characterized in that the information transmitted on the CSI-RS resource is a scheduling message included in the first ePDCCH, and the scheduling message includes scheduling at least one scheduling message among the SIB message, scheduling the paging message and scheduling the RACH response message.

38. The device according to any one of claims 34-37, characterized in that the transmitter is also used for:

In the subframe where the CSI-RS is located, and in the resources of the common search space, when performing rate matching, the resources of the CSI-RS configured for the UE are bypassed, and the CSI-RS resources are configured for the UE. The UE sends the second ePDCCH, and the second ePDCCH is used to schedule information except the SIB message, the paging message and the RACH response message.

39. The apparatus according to claim 34, wherein the transmitter is further configured to: when the resources of the common search space are in a part of subframes, and the part of the subframes includes the UE's When the subframe where the CSI-RS is located, send the first ePDCCH and/or the second ePDCCH to the UE in the subframe where the CSI-RS is located, and do not send the CSI-RS;

Wherein, the second ePDCCH is used to schedule information other than the SIB message, the paging message and the RACH response message, and the information transmitted on the CSI-RS resource is the first The ePDCCH and/or the second ePDCCH contains a scheduling message, where the scheduling message includes at least one of scheduling the SIB message, scheduling the paging message, and scheduling the RACH response message.