CN102938661A

CN102938661A - Transmitting method, transmitting system, network side device and receiving side device for controlling channels

Info

Publication number: CN102938661A
Application number: CN2011102324181A
Authority: CN
Inventors: 郭森宝; 孙云锋; 陈艺戬; 戴博
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-08-15
Filing date: 2011-08-15
Publication date: 2013-02-20
Anticipated expiration: 2031-08-15
Also published as: CN102938661B

Abstract

The invention discloses a transmitting method for controlling channels. The method comprises that a network side device uses at least one port to send e physical downlink shared channel (PDCCH) information in a PDSCH region, and a receiving side device receives relative ePDCCH information from a sending port of the ePDCCH. The invention also discloses a transmitting system, the network side device and the receiving side device for controlling channels. Accordingly, good space diversity gain can be obtained for the transmission of the ePDCCH, the PDCCH capacity of the system is improved, the effect of the ePDCCH on the PDSCH region is reduced and the scheduling flexibility of the system is improved.

Description

Transmission method and system of control channel, network side equipment and receiving side equipment

Technical Field

The present invention relates to a Long term evolution Advanced system (LTE-Advanced), and in particular, to a transmission method and system for a control channel, a network side device, and a receiving side device.

Background

In LTE Release8/9, a Common Reference Signal (CRS) is designed for measuring the quality of a channel and demodulating received data symbols, a User Equipment (UE) may measure the channel through the CRS to decide that the UE performs cell reselection and handover to a target cell, and measure the channel quality in a UE connection state, and when the interference level is high, a physical layer may disconnect through a radio link connection failure signaling related to a higher layer. In LTE R10, to further improve the cell average spectrum utilization and the cell edge spectrum utilization as well as the throughput of each UE, two kinds of reference signals are defined: a Channel information reference signal (CSI-RS) and a demodulation reference signal (DMRS), wherein the CSI-RS is used for measuring a Channel, and a Precoding Matrix Index (PMI), a Channel Quality information Indicator (CQI), and a Rank Indicator (RI) that the UE needs to feed back to the eNB can be calculated through the measurement of the CSI-RS. The DMRS is used for demodulating the downlink shared channel, the demodulation of the DMRS can reduce the interference between different receiving sides and different cells by using a beam method, can reduce the performance degradation caused by codebook granularity, and can reduce the overhead of downlink control signaling to a certain extent (because the bit overhead of the PMI is not added in a physical downlink control channel).

In LTE R8, R9, and R10, the physical downlink control channels are mainly distributed in the first 1, or the first 2, or the first 3 OFDM of a subframe, and the specific distribution needs to be configured according to different subframe types and port numbers of CRS, and generally, the number of OFDM symbols of PDCCH is as shown in table 1:

TABLE 1

Each receiving side needs to perform blind detection according to a Physical Control Format Indicator Channel (PCFICH) in the first three symbols, and the starting position of the blind detection and the number of elements of the control channel are related to the temporary radio network identification and different control information allocated to the receiving side. The control information can be generally divided into public control information and special control information, the public control information is generally placed in a public search space of a physical downlink control channel, and the special control information can be placed in all public spaces and a special search space. And the receiving side acquires whether the common system message, the downlink scheduling or the uplink scheduling information exists in the current subframe after blind detection. Since there is no HARQ feedback for this downlink control information, it is necessary to ensure that the detected error rate is as low as possible.

Under an LTE R10 heterogeneous network, due to strong interference of different base station types, in consideration of the interference problem of a Macro base station (Macro eNodeB) to a micro base station (Pico) and the interference problem of a Home base station (Home eNodeB) to the Macro base station (Macro eNodeB), a resource Muting method is proposed to solve the mutual interference problem between different types of base stations, and specific resource Muting methods can be divided into a subframe-based Muting (Muting) method (e.g., ABS method) and a resource element-based method (e.g., CRS Muting method).

The method not only increases the waste of resources, but also brings great limitation to scheduling, and especially when considering the ABS configuration of the Macro eNodeB, if the Pico is distributed more, the ABS configuration of the Macro eNodeB is more, thus bringing greater influence to the Macro eNodeB, and increasing the scheduling delay while increasing the waste of resources. Moreover, for the control channel, the interference of the data resources of different control channels can only be reduced under the ABS, the problem of the interference of the CRS resources and the data resources cannot be solved, and for the method of muting the CRS, the interference between the data resources cannot be solved, and the backward compatibility of this method is not good, and while increasing the access delay, more standardization efforts may be required.

In an LTE R11 stage, more users may be introduced to transmit on an MBSFN subframe, which may cause insufficient capacity of a PDCCH that can be carried by 2 MBSFN configured symbols, and in order to ensure backward compatibility for R8/R9/R10 users, a new resource for transmitting Control information, that is, an enhanced physical Downlink Control Channel (ePDCCH), needs to be created on a Physical Downlink Shared Channel (PDSCH) resource. However, the current time-domain PDCCH cannot solve this problem by space division, and in consideration of backward compatibility with R8 and R9, the control channel scheme such as time-domain PDCCH must be reserved, and then detailed research is needed to solve the interference between the control channels by using space division technology.

In order to obtain a better space division effect, improve the capacity of the PDCCH of the system, reduce the influence of the ePDCCH on the PDSCH region, and improve the scheduling flexibility of the system, the multi-port transmission of the ePDCCH needs to be considered, but a related control channel transmission method is not proposed at present.

Disclosure of Invention

In view of this, the main objective of the present invention is to provide a transmission method and system for a control channel, a network side device, and a receiving side device, which can obtain better space diversity gain for ePDCCH transmission, improve the capacity of the PDCCH of the system, reduce the influence of the ePDCCH on the PDSCH region, and improve the scheduling flexibility of the system.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method for transmitting a control channel, comprising:

the network side equipment adopts at least one port to send ePDCCH information in a PDSCH region;

and the receiving side equipment receives related ePDCCH information from a transmitting port of the ePDCCH.

The receiving side device receives related ePDCCH information from a sending port of an ePDCCH as follows: and the receiving side equipment judges the sending port of the ePDCCH by blindly detecting the data of each antenna port according to the indication of the network side equipment or according to the standard convention, and receives related ePDCCH information from the sending port of the ePDCCH.

The receiving side device receives related ePDCCH information from a sending port of an ePDCCH as follows: the receiving side equipment detects or blindly detects the port number of the ePDCCH indicated by the primary control information of the PDCCH region or the PDSCH region according to the indication of the network side equipment to judge the sending port of the ePDCCH, and receives the related ePDCCH information from the sending port of the ePDCCH.

The method further comprises the following steps: the network side device informs the receiving side device of the port number adopted for blind detection or receiving ePDCCH information through RRC signaling and/or a codebook cluster restriction set,

the receiving side device receives related ePDCCH information from a sending port of an ePDCCH as follows: and blind-checking or receiving related ePDCCH information from a port corresponding to the port number notified by the network side equipment.

The receiving side device receives related ePDCCH information from a sending port of an ePDCCH as follows: according to the indication of the network side equipment or according to the standard convention, the receiving side equipment determines the port number adopted for blind detection or receiving the ePDCCH by using the rank indication RI and/or the channel quality information indication CQI which feeds back the PDSCH the last time, or determines the port number adopted for blind detection or receiving the ePDCCH by using the RI and/or the CQI information which feeds back the PDSCH the last time and the codebook cluster limiting set, and blindly detects or receives the related ePDCCH information from the corresponding port.

The method further comprises the following steps:

the receiving side equipment determines the length of the orthogonal mask OCC for blind detection or receiving the ePDCCH demodulation pilot frequency by utilizing the codebook cluster limiting set according to the indication of the network side equipment or according to the standard convention, or determines the length of the OCC for receiving or blind detection the ePDCCH demodulation pilot frequency according to the value of the RI and/or CQI and/or the moving speed which are fed back recently, or determines the length of the OCC for receiving or blind detection the ePDCCH demodulation pilot frequency by utilizing the codebook limiting set and the RI and/or CQI and/or the moving speed which are fed back recently.

The network side equipment informs the receiving side equipment of performing blind detection on DCI format 1A in the ePDCCH only by adopting a mode of OCC being 2 through configuring a downlink control information format.

The network side device adopts at least one port to send ePDCCH information in a PDSCH region as follows: the network side equipment limits that different ePDCCH signaling can only be transmitted in one layer, and different ePDCCH signaling located in the same time frequency resource occupies different antenna ports.

The network side device adopts at least one port to send ePDCCH information in a PDSCH region as follows: the network side equipment limits different ePDCCH signaling to adopt N layers for transmission, one ePDCCH code word adopts a code rate of A to be mapped to the N layers for transmission, or one code word adopts a code rate of 2A, two code words are generated by repeating one time and then are respectively mapped to the N layers for transmission, wherein N is larger than 1, and 1 is larger than A and larger than 0.

A transmission system of a control channel comprises a network side device and a receiving side device; wherein,

the network side equipment is used for sending ePDCCH information in a PDSCH region by adopting at least one port;

the receiving side equipment is used for receiving related ePDCCH information from a transmitting port of an ePDCCH.

The network side device is further configured to notify the receiving side device of the blind test or the port number used for receiving the ePDCCH information through an RRC signaling and/or a codebook cluster restriction set,

The receiving side device is further configured to determine, according to an instruction of the network side device or according to a standard convention, the length of the OCC of the ePDCCH demodulation pilot to be blind detected or received by using the codebook cluster restriction set, or determine, according to the value of the RI and/or the CQI and/or the moving speed that is fed back recently, the length of the OCC of the ePDCCH demodulation pilot to be received or blind detected, or determine, by using the codebook restriction set and the RI and/or the CQI and/or the moving speed that is fed back recently, the length of the OCC of the ePDCCH demodulation pilot to be received or blind detected.

The network side device is further configured to notify the receiving side device that blind detection of the DCI format 1A in the ePDCCH is performed only in a manner that the OCC is 2 by configuring a downlink control information format.

A network side device is used for sending ePDCCH information in a PDSCH region by adopting at least one port.

The network side device is further configured to instruct the receiving side device to determine the sending port of the ePDCCH by blindly detecting data of each antenna port.

The network side device is further configured to instruct the receiving side device to determine a sending port of the ePDCCH by detecting or blindly detecting a port number of the ePDCCH indicated by the primary control information in the PDCCH region or the PDSCH region.

The network side device is further configured to notify the receiving side device of the blind test or the port number used for receiving the ePDCCH information through an RRC signaling and/or a codebook cluster restriction set.

The network side device is further configured to instruct the receiving side device to determine a port number used for blind detection or receiving the ePDCCH by using the rank indication RI and/or the channel quality information indication CQI of the PDSCH that is fed back last time, or determine a port number used for blind detection or receiving the ePDCCH by using the RI and/or the CQI of the PDSCH that is fed back last time and the codebook cluster restriction set.

The network side device is further configured to instruct the receiving side device to determine an orthogonal mask OCC length for blind detection or receiving the ePDCCH demodulation pilot by using the codebook cluster restriction set, or determine an OCC length for receiving or blind detection the ePDCCH demodulation pilot according to a value of a RI and/or a CQI and/or a moving speed fed back recently, or determine an OCC length for receiving or blind detection the ePDCCH demodulation pilot by using the codebook restriction set and the RI and/or the CQI and/or the moving speed fed back recently.

A receiving side device is used for receiving related ePDCCH information from a transmitting port of an ePDCCH.

The receiving side device is further configured to determine, according to an instruction of the network side device or according to a standard convention, an orthogonal mask OCC length for blind detection or receiving the ePDCCH demodulation pilot by using the codebook cluster restriction set, or determine, according to a value of a most recently fed RI and/or CQI and/or a moving speed, an OCC length for receiving or blind detection the ePDCCH demodulation pilot, or determine, according to the codebook restriction set and the most recently fed RI and/or CQI and/or the moving speed, an OCC length for receiving or blind detection the ePDCCH demodulation pilot.

The invention discloses a transmission method and a system of a control channel, network side equipment and receiving side equipment, wherein the network side equipment adopts at least one port to send ePDCCH information in a PDSCH region of a physical downlink shared channel; and the receiving side equipment receives related ePDCCH information from a transmitting port of the ePDCCH. The invention can obtain better space diversity gain for the transmission of the ePDCCH, improve the capacity of the PDCCH of the system, reduce the influence of the ePDCCH on the PDSCH region and improve the scheduling flexibility of the system.

Drawings

Fig. 1 is a flow chart illustrating a transmission method of a control channel according to the present invention.

Detailed Description

The basic idea of the invention is: the network side equipment adopts at least one port to send ePDCCH information in a PDSCH region; and the receiving side equipment receives related ePDCCH information from a transmitting port of the ePDCCH.

Fig. 1 is a schematic flow chart of a transmission method of a control channel according to the present invention, as shown in fig. 1, the method includes:

step 101: and the network side equipment adopts at least one port to send the ePDCCH information in the PDSCH region.

Step 102: and the receiving side equipment receives related ePDCCH information from a transmitting port of the ePDCCH.

Preferably, the network side uses at least one port to transmit ePDCCH information in the PDSCH region, the network side instructs the UE to determine the transmission port of the ePDCCH by blindly detecting data of each antenna port, and correspondingly, the receiving side device determines the transmission port of the ePDCCH by blindly detecting data of each antenna port according to the instruction of the network side device or according to standard convention, and receives related ePDCCH information from the transmission port of the ePDCCH.

Preferably, the network side uses at least one port to transmit ePDCCH information in the PDSCH region, the network side instructs the UE to determine the transmission port of the ePDCCH by detecting or blind-detecting the port number of the ePDCCH indicated by the primary control information of the PDCCH region or the PDSCH region, and correspondingly, the receiving side device detects or blind-detects the port number of the ePDCCH indicated by the primary control information of the PDCCH region or the PDSCH region according to the instruction of the network side device to determine the transmission port of the ePDCCH, and receives related ePDCCH information from the transmission port of the ePDCCH.

Preferably, the network side configures, through RRC signaling, a port number used by the receiving side device to blindly detect or receive the ePDCCH.

Preferably, the network side notifies the receiving side device of the port number used for blind detection or receiving the ePDCCH by using the codebook cluster restriction set.

Preferably, the network side notifies the receiving side device of blind detection or the port number used for receiving the ePDCCH by using the codebook cluster restriction set and the RRC port configuration signaling.

Preferably, the network side device notifies the receiving side device to determine the port number used for blind detection or receiving the ePDCCH by using the RI and/or CQI information of the PDSCH fed back last time through high layer signaling or standard convention, and the receiving side device determines the port number used for blind detection or receiving the ePDCCH by using the rank indication RI and/or channel quality information indication CQI information of the PDSCH fed back last time according to the indication of the network side device or according to standard convention, and blind detects or receives the related ePDCCH information from the corresponding port.

Preferably, the network side device notifies the receiving side device to determine the port number used for blind detection or receiving the ePDCCH by using the RI and/or CQI information of the PDSCH fed back last time and the codebook cluster restriction set through a high layer signaling or a standard convention, and the receiving side device determines the port number used for blind detection or receiving the ePDCCH by using the RI and/or CQI information of the PDSCH fed back last time and the codebook cluster restriction set according to an indication of the network side device or according to the standard convention, and blind detects or receives the related ePDCCH information from the corresponding port.

Preferably, the network side device notifies the receiving side device to determine the length of orthogonal Code (OCC) of the received or blind-detected ePDCCH demodulation pilot by using the codebook cluster restriction set through a high-level signaling or a standard convention, and the receiving side device determines the length of OCC of the blind-detected or received ePDCCH demodulation pilot by using the codebook cluster restriction set according to an indication of the network side device or according to the standard convention.

Preferably, the network side device notifies the receiving side device to decide to receive or blindly detect the OCC length of the ePDCCH demodulation pilot according to the RI and/or CQI and/or the value of the moving speed fed back recently through higher layer signaling or standard convention.

Preferably, the network side device informs the receiving side device to decide to receive or blindly detect the OCC length of the ePDCCH demodulation pilot by using the codebook restriction set and the RI and/or CQI and/or moving speed fed back recently through high-layer signaling or standard convention.

Preferably, the network side device notifies the receiving side device of performing blind detection on the DCI format 1A in the ePDCCH by configuring the downlink control information format in a manner that the OCC is 2 only.

Preferably, when the network side device sends the ePDCCH information at multiple antenna ports, the network side device may send unrelated ePDCCH signaling at different ports, or send related ePDCCH signaling at different ports.

Preferably, the network side device restricts different ePDCCH signaling to be transmitted only in one layer, and different ePDCCH signaling located in the same time-frequency resource occupies different antenna ports.

Preferably, the network side device limits different ePDCCH signaling to adopt N (N > 1) layer transmission, one ePDCCH codeword is mapped to N (N > 1) layer transmission with a code rate of a (1 > a > 0), or one codeword adopts a code rate of 2A, two codewords are generated by repeating one time, and then are mapped to N (N > 1) layer transmission respectively.

The invention also correspondingly provides a transmission system of the control channel, which comprises network side equipment and receiving side equipment; wherein,

The invention also correspondingly provides network side equipment, and the network side equipment is used for adopting at least one port to send ePDCCH information in the PDSCH region of the physical downlink shared channel.

The invention also correspondingly provides a receiving side device, which is used for receiving the related ePDCCH information from the transmitting port of the ePDCCH.

The receiving side in the present invention may be a UE, a relay, or the like.

The technical solution of the present invention is further described in detail by the following specific examples.

Example one

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8.

The receiving side obtains the ePDCCH information by blindly detecting an ePDCCH port in the PDSCH region, and the blind detection process can be described as follows:

the UE receives ePDCCH information in the PDSCH region, and then blindly detects all possible ports in sequence, for example, it may be assumed that ePDCCH is sent on port 7, the receiving side receives ePDCCH information according to port 7 first, and then detects CRC of the received information using C-RNTI of the receiving side, if the CRC check result is 1, the receiving side changes another possible port and assumes that ePDCCH is sent on the port, for example, it is assumed that ePDCCH is sent on port 8, and blindly detects according to the method of port 7, and so on. If a receiving side blindly detects a port and sends ePDCCH information to the receiving side, it can decide whether to continue detecting other ports according to the maximum transmission port number of ePDCCH specified in the standard, for example: if the maximum transmission layer number of the ePDCCH is specified to be 2 in the standard, the receiving side needs to blindly detect the ports 7, 8, 7 and 8, and the maximum blind detection times of the blind detection ports are 2 under three conditions.

Example two

The receiving side determines a transmission port of the ePDCCH by receiving or blindly detecting the primary control information in a PDCCH region or a PDSCH region.

The primary control information of the PDCCH region or the PDSCH region includes the port related information of the ePDCCH, for example, the primary control information may include 1 or 2 bits to indicate the port 7 or the port 8 or the ports 7 and 8 used by the ePDCCH on the receiving side, if the ePDCCH is limited to only one layer transmission, only 1 bit notification is needed, if the ePDCCH is limited to maximum two-layer transmission, only 2 bits are needed for notification.

EXAMPLE III

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side informs the receiving side of the port number adopted by the ePDCCH sent by the network side through RRC signaling. The receiving side determines the port number adopted by the ePDCCH through the received RRC signaling, and then performs blind detection or reception of the ePDCCH by using the port.

Example four

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side informs the receiving side of the maximum port number adopted by the ePDCCH sent by the network side through RRC signaling. And the receiving side determines the port number adopted by the ePDCCH through the received RRC signaling, and then performs blind detection or reception of the ePDCCH by using the port.

For example: the network side informs the receiving side that the maximum port number is 8, if the maximum transmission port number of the ePDCCH is limited to 1, the receiving side needs to blindly detect the port 7 or the port 8 at this time, namely, the receiving side firstly blindly detects the port 7, if the port 7 contains the corresponding required ePDCCH information, the receiving side does not perform the blindness detection of the port 8, otherwise, the port 8 needs to be blindly detected. If the maximum number of transmission ports of the restricted ePDCCH is 2, then the receiving side needs to blind detect the port 7 and the port 8, that is, the receiving side firstly blind detects the port 7, and if the port 7 contains the corresponding required ePDCCH information, the receiving side will also perform blind detection on the port 8.

EXAMPLE five

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side implicitly informs the receiving side of the maximum port number adopted by the ePDCCH sent by the network side through codebook cluster restriction set signaling. And the receiving side determines the port number adopted by the ePDCCH through the received codebook cluster restriction set signaling, and then performs blind detection or reception of the ePDCCH by using the port.

For example: the network side informs the receiving side that the codebook cluster restriction set is larger than 4 layers of transmission, if the maximum transmission port number for restricting ePDCCH is 1, the receiving side needs to blind detect the port 7, 8, 9, 10 or 7, 8, namely the receiving side firstly blindly detects the port before the port, if the port before contains the corresponding required ePDCCH information, the receiving side does not perform blind detection on one or more ports after, otherwise, blind detection on one or more ports after is needed. If the maximum number of transmission ports for limiting the ePDCCH is 2, then receiving the ports 7, 8, 9, and 10 that need to be blind-checked, that is, the receiving side firstly blind-checks the port 7, and if the port 7 contains the corresponding required ePDCCH information, the receiving side will also perform blind-check on the ports 8, 9, and 10 until at least two ports containing ePDCCH information are detected or all the ports are blind-checked. Or, if the maximum number of transmission ports of the ePDCCH is limited to 2, then the receiving side needs to blind detect the ports 7 and 8, that is, the receiving side first blindly detects the port 7, and if the port 7 contains the corresponding needed ePDCCH information, the receiving side will also perform blind detection on the port 8. If the maximum number of transmission ports for limiting the ePDCCH is 3, then receiving the ports 7, 8, 9, and 10 that need to be blind-checked, that is, the receiving side firstly blind-checks the port 7, and if the port 7 contains the corresponding needed ePDCCH information, the receiving side will also perform blind-check on the ports 8, 9, and 10 until blind-checking that at least 3 ports contain ePDCCH information or blind-checking all ports is completed. If the maximum number of transmission ports for limiting the ePDCCH is 4, then receiving the ports 7, 8, 9, and 10 that need to be blind-checked, that is, the receiving side firstly blind-checks the port 7, and if the port 7 contains the corresponding required ePDCCH information, the receiving side will also perform blind-check on the ports 8, 9, and 10 until blind-checking that at least 4 ports contain ePDCCH information or blind-checking all the ports is completed.

When the network side informs the receiving side that the codebook cluster restriction set is less than or equal to 4 layers of transmission, the receiving side only needs to blindly detect the port 7.

Or, the network side informs the receiving side that the codebook cluster restriction set is larger than 2 layers of transmission, if the maximum number of transmission ports restricting the ePDCCH is 1, the receiving side needs to blind-detect the ports 7 and 8, that is, the receiving side firstly blindly detects the port 7, if the port 7 contains the corresponding needed ePDCCH information, the receiving side does not perform blind-detection on the port 8, otherwise, the receiving side needs to blindly detect the port 8. If the maximum number of transmission ports for limiting the ePDCCH is 2, then the receiving side needs to blindly detect the ports 7 and 8, that is, the receiving side firstly blindly detects the port 7, and if the port 7 contains the corresponding required ePDCCH information, the receiving side will also perform the blindness detection of the port 8 until at least two ports containing the ePDCCH information are detected or all the ports are blindly detected.

When the network side informs the receiving side that the codebook cluster restriction set is less than or equal to 2 layers of transmission, the receiving side only needs to blindly detect the port 7.

EXAMPLE six

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. The network side implicitly informs the receiving side of the maximum port number adopted by the ePDCCH sent by the network side through codebook cluster restriction set signaling, and informs the receiving side of the ePDCCH port number through high-layer signaling. And the receiving side determines the port number adopted by the ePDCCH by notifying the ePDCCH port number of the receiving side through the received codebook cluster restriction set signaling and high-layer signaling, and then performs blind detection or reception of the ePDCCH by using the port.

When the network side informs the receiving side that the codebook cluster restriction set is less than or equal to 4 layers of transmission, the receiving side performs blind detection according to the ePDCCH port number informed by the high-layer signaling.

When the network side informs the receiving side that the codebook cluster restriction set is less than or equal to 2-layer transmission, the receiving side performs blind detection according to the ePDCCH port number informed by the high-layer signaling.

EXAMPLE seven

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side utilizes the RI fed back recently by the receiving side to decide the port number adopted by the transmitted ePDCCH. The receiving side determines the port number adopted by the ePDCCH through the RI fed back recently, and then performs blind detection or reception of the ePDCCH by using the port.

For example: the network side allocates ePDCCH ports by using the RI fed back recently by the receiving side, when the RI is larger than 4-layer transmission, if the maximum transmission port number of the ePDCCH is limited to 1, the receiving side needs to blindly detect the ports 7, 8, 9, 10 or 7, 8, namely the receiving side firstly blindly detects the port before the port, if the port before contains the corresponding needed ePDCCH information, the receiving side does not perform blind detection on one or more ports after, otherwise, the port or ports after are required to be blindly detected.

Or, the network side allocates the ePDCCH ports by using the RI fed back recently by the receiving side, and when the RI is greater than 4 layers of transmission, if the maximum number of transmission ports of the ePDCCH is limited to 1, the receiving side needs to blind-detect the ports 7 and 8, that is, the receiving side firstly blind-detects the port 7, if the port 7 contains the corresponding needed ePDCCH information, the receiving side does not perform blind-detection on the port 8, otherwise, the receiving side needs to blind-detect the port 8.

Or, the network side allocates ePDCCH ports by using the RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission, if the maximum number of transmission ports of the ePDCCH is limited to 2, then the receiving side needs to blind-detect the ports 7, 8, 9, and 10, that is, the receiving side firstly blind-detects the port 7, and if the port 7 contains corresponding needed ePDCCH information, the receiving side will also perform blind-detection on the ports 8, 9, and 10 until it is detected that at least two ports contain ePDCCH information or all the ports are blind-detected.

Or, the network side allocates the ePDCCH ports by using the RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission, if the maximum number of transmission ports of the ePDCCH is limited to 2, then the receiving side needs to blind-detect the ports 7 and 8, that is, the receiving side firstly blindly detects the port 7, and if the port 7 contains the corresponding needed ePDCCH information, the receiving side will also perform blind-detection on the port 8.

Or, the network side allocates ePDCCH ports by using the RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission, if the maximum number of transmission ports of the ePDCCH is limited to 3, then the receiving side needs to blind-detect the ports 7, 8, 9, and 10, that is, the receiving side firstly blind-detects the port 7, and if the port 7 contains corresponding needed ePDCCH information, the receiving side also performs blind-detection on the ports 8, 9, and 10 until at least 3 ports contain ePDCCH information or all the ports are blind-detected.

Or, the network side allocates ePDCCH ports by using the RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission, if the maximum number of transmission ports of the ePDCCH is limited to 4, then the receiving side receives the ports 7, 8, 9, and 10 that need to be blindly detected, that is, the receiving side firstly blindly detects the port 7, and if the port 7 contains the corresponding needed ePDCCH information, the receiving side also performs blind detection on the ports 8, 9, and 10 until at least 4 ports contain ePDCCH information or all the ports are blindly detected.

And the network side allocates the ePDCCH port by using the RI fed back recently by the receiving side, and the ePDCCH port is only allocated when the RI is less than or equal to the blind detection port 7 of the 4-layer transmission receiving side. Or if the receiving side is not configured with RI feedback, the receiving side may blind-check the port 7.

Or, the network side allocates the ePDCCH ports by using the RI fed back recently by the receiving side, and when the RI is greater than 2-layer transmission, if the maximum number of transmission ports of the ePDCCH is limited to 1, the receiving side needs to blind-detect the ports 7 and 8, that is, the receiving side firstly blind-detects the port 7, if the port 7 contains the corresponding needed ePDCCH information, the receiving side does not perform blind-detection on the port 8, otherwise, the port 8 needs to be blind-detected. If the maximum number of transmission ports for limiting the ePDCCH is 2, then the receiving side needs to blindly detect the ports 7 and 8, that is, the receiving side firstly blindly detects the port 7, and if the port 7 contains the corresponding required ePDCCH information, the receiving side will also perform the blindness detection of the port 8 until at least two ports containing the ePDCCH information are detected or all the ports are blindly detected.

The network side allocates the ePDCCH port by using the RI fed back recently by the receiving side, and the ePDCCH port is allocated when the RI is less than or equal to the blind detection port 7 of the layer 2 transmission receiving side. Or if the receiving side is not configured with RI feedback, the receiving side may blind-check the port 7.

Example eight

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side determines the port number adopted by the transmitted ePDCCH by using the RI fed back recently by the receiving side and the ePDCCH port number notified by the higher layer signaling. And the receiving side determines the port number adopted by the ePDCCH through the RI fed back recently and the ePDCCH port number notified by the higher layer signaling, and then performs blind detection or reception of the ePDCCH by using the port.

And the network side allocates the ePDCCH port by using the RI fed back by the receiving side recently, and the transmission receiving side blindly detects the port notified by the port number notified by the high-level signaling when the RI is less than or equal to 4 layers. Or if the receiving side does not configure RI feedback, the receiving side blindly detects the port notified by the port number notified by the higher layer signaling.

And the network side allocates the ePDCCH port by using the RI fed back by the receiving side recently, and the transmission receiving side blindly detects the port notified by the port number notified by the high-level signaling when the RI is less than or equal to the port notified by the port number notified by the layer 2 transmission receiving side. Or if the receiving side does not configure RI feedback, the receiving side blindly detects the port notified by the port number notified by the higher layer signaling.

Example nine

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side determines the port number adopted by the transmitted ePDCCH by using the RI and the CQI which are fed back recently by the receiving side. And the receiving side determines the port number adopted by the ePDCCH through the RI and the CQI which are fed back recently, and then performs blind detection or reception of the ePDCCH by using the port.

For example: the network side allocates the ePDCCH ports by using the RI and the CQI recently fed back by the receiving side, and when the RI is greater than 4-layer transmission and the CQIs of the corresponding two codewords are both greater than a certain threshold, for example, 10, if the maximum number of transmission ports of the ePDCCH is limited to 1, the receiving side needs to blind-detect the ports 7, 8, 9, 10, or 7, 8, that is, the receiving side firstly blind-detects the port before the port, if the port before contains the ePDCCH information required correspondingly, the receiving side does not perform blind-detection on one or more ports after, otherwise, needs to blind-detect one or more ports after.

Or, the network side allocates ePDCCH ports by using an RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission and CQIs of two corresponding codewords are both greater than a certain threshold, for example, 10, if the maximum number of transmission ports of the ePDCCH is limited to 1, the receiving side needs to blind-detect the ports 7 and 8, that is, the receiving side first blindly detects the port 7, if the port 7 contains corresponding needed ePDCCH information, the receiving side does not perform blind-detection of the port 8, otherwise, the receiving side needs to blindly detect the port 8.

Or, the network side allocates ePDCCH ports by using an RI fed back by the receiving side most recently, and when the RI is greater than 4-layer transmission and CQIs of two corresponding codewords are both greater than a certain threshold, for example, 10, if the maximum number of transmission ports of the ePDCCH is limited to 2, then the receiving side needs to blind-detect the ports 7, 8, 9, and 10, that is, the receiving side first blindly detects the port 7, and if the port 7 contains corresponding required ePDCCH information, the receiving side further performs blind detection on the ports 8, 9, and 10 until it is detected that at least two ports contain ePDCCH information or all the ports are blindly detected.

Or, the network side allocates ePDCCH ports by using an RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission and CQIs of two corresponding codewords are both greater than a certain threshold, for example, 10, if the maximum number of transmission ports of the ePDCCH is limited to 2, then the receiving side needs to blind-detect the ports 7 and 8, that is, the receiving side firstly blindly detects the port 7, and if the port 7 contains corresponding needed ePDCCH information, the receiving side will also perform blind-detection on the port 8.

Or, the network side allocates ePDCCH ports by using an RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission and CQIs of two corresponding codewords are both greater than a certain threshold, for example, 10, if the maximum number of transmission ports of the ePDCCH is limited to 3, then receiving the ports 7, 8, 9, and 10 that need to be blind-detected, that is, the receiving side firstly blindly detects the port 7, and if the port 7 includes corresponding required ePDCCH information, the receiving side also performs blind detection on the ports 8, 9, and 10 until at least 3 ports include ePDCCH information or all the ports are blind-detected.

Or, the network side allocates ePDCCH ports by using an RI fed back recently by the receiving side, and when the RI is greater than 4-layer transmission and CQIs of two corresponding codewords are both greater than a certain threshold, for example, 10, if the maximum number of transmission ports of the ePDCCH is limited to 4, then receiving the ports 7, 8, 9, and 10 that need to be blind-detected, that is, the receiving side firstly blindly detects the port 7, and if the port 7 includes corresponding required ePDCCH information, the receiving side also performs blind detection on the ports 8, 9, and 10 until at least 4 ports include ePDCCH information or all the ports are blind-detected.

And the network side allocates the ePDCCH port by using the RI fed back by the receiving side most recently, and the receiving side blindly detects the port 7 when the RI is less than or equal to 4-layer transmission or the CQI of any code word of two code words is less than a threshold value. Or if the receiving side is not configured with RI feedback, the receiving side may blind-check the port 7.

Or, the network side allocates ePDCCH ports by using an RI fed back recently by the receiving side, and when the RI is greater than 2-layer transmission and CQIs of two corresponding codewords are both greater than a certain threshold, for example, 10, if the maximum number of transmission ports of the ePDCCH is limited to 1, the receiving side needs to blind-detect the ports 7 and 8, that is, the receiving side first blindly detects the port 7, if the port 7 contains corresponding needed ePDCCH information, the receiving side does not perform blind-detection of the port 8, otherwise, the receiving side needs to blindly detect the port 8. If the maximum number of transmission ports for limiting the ePDCCH is 2, then the receiving side needs to blindly detect the ports 7 and 8, that is, the receiving side firstly blindly detects the port 7, and if the port 7 contains the corresponding required ePDCCH information, the receiving side will also perform the blindness detection of the port 8 until at least two ports containing the ePDCCH information are detected or all the ports are blindly detected.

The network side allocates the ePDCCH port by using the RI fed back by the receiving side most recently, and the receiving side blindly detects the port 7 when the RI is less than or equal to 2-layer transmission or the CQI of any code word of two code words is less than a threshold value. Or if the receiving side is not configured with RI feedback, the receiving side may blind-check the port 7.

Example ten

And the network side allocates the ePDCCH port by using the RI fed back by the receiving side most recently, and when the RI is less than or equal to 4-layer transmission or the CQI of any code word of two code words is less than a threshold value, the receiving side blindly detects the port notified by the port number notified by the high-layer signaling. Or if the receiving side does not configure RI feedback, the receiving side blindly detects the port notified by the port number notified by the higher layer signaling.

And the network side allocates the ePDCCH port by using the RI fed back by the receiving side most recently, and when the RI is less than or equal to 2-layer transmission or the CQI of any code word of the two code words is less than a threshold value, the receiving side blindly detects the port notified by the port number notified by the high-layer signaling. Or if the receiving side does not configure RI feedback, the receiving side blindly detects the port notified by the port number notified by the higher layer signaling.

EXAMPLE eleven

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side implicitly informs the receiving side of the length of the OCC adopted by the ePDCCH sent by the network side through codebook cluster restriction set signaling. And the receiving side determines the OCC length adopted by the ePDCCH through the received codebook cluster restriction set signaling, and then performs blind detection or reception of the ePDCCH by using the OCC length.

For example: the network side informs the receiving side that the codebook cluster restriction set is larger than 4 layers of transmission, and the receiving side performs despreading processing on the demodulation pilot frequency according to the OCC with the length equal to 4. The network side informs the receiving side that the codebook cluster restriction set is less than or equal to 4 layers of transmission, and the receiving side performs despreading processing on the demodulation pilot frequency according to the OCC with the length equal to 2.

The length-4 OCC code can only adopt OCC codes: [1, 1, 1, 1] or [1, -1, 1, -1], the length 2 OCC code can only adopt OCC codes: [1, 1] or [1, -1 ]. The UE may perform blind detection on 1A only by using OCC of 2.

Example twelve

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. The network side determines the length of the OCC adopted by the ePDCCH of the receiving side through the RI fed back by the receiving side recently. The receiving side determines the OCC length adopted by the ePDCCH through the RI fed back by the receiving side, and then performs blind detection or reception of the ePDCCH by using the OCC length.

For example: the RI fed back by the receiving side recently is larger than 4 layers, and the receiving side carries out despreading processing on the demodulation pilot frequency according to the OCC with the length equal to 4. Otherwise, the receiving side despreads the demodulation pilot frequency according to the OCC with the length equal to 2.

EXAMPLE thirteen

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. And the network side determines the length of the OCC adopted by the ePDCCH of the receiving side through the RI and the CQI fed back by the receiving side recently. The receiving side determines the OCC length adopted by the ePDCCH according to the RI and the CQI fed back by the receiving side recently, and then performs blind detection or reception of the ePDCCH by using the OCC length.

For example: the RI fed back by the receiving side most recently is greater than 4 layers and the CQIs of both codewords are greater than a threshold, for example, the threshold is 10, and the receiving side performs despreading processing on the demodulation pilot frequency according to the OCC with the length equal to 4. Otherwise, the receiving side despreads the demodulation pilot frequency according to the OCC with the length equal to 2.

Example fourteen

The network side sends ePDCCH information to the receiving side in the PDSCH region, and the network side may send ePDCCH information to the receiving side by using multiple ports, for example, may send ePDCCH to the receiving side by using antenna ports 7 and 8. The network side determines the length of the OCC adopted by the ePDCCH of the receiving side according to the RI and the CQI fed back by the receiving side and the speed of the receiving side. The receiving side determines the OCC length adopted by the ePDCCH according to the RI and the CQI fed back by the receiving side recently, and then performs blind detection or reception of the ePDCCH by using the OCC length.

For example: and when the RI fed back by the receiving side is greater than 4 layers and the CQIs of both code words are greater than a threshold, for example, the threshold is 10, and the speed of the receiving side meets a certain condition, the receiving side despreads the demodulation pilot frequency according to the OCC with the length equal to 4. Otherwise, the receiving side despreads the demodulation pilot frequency according to the OCC with the length equal to 2.

Example fifteen

Based on the above embodiments, when the network side transmits the ePDCCH signaling by using multiple antenna ports, it is limited that DL-Grant and UL-Grant can only be transmitted by one layer at the maximum, and the network side transmits the ePDCCH signaling by using multiple antenna ports, where DL-Grant and UL-Grant located in the same time-frequency resource need to be transmitted on different antenna ports, that is, DL-Grant and UL-Grant are transmitted by different layers.

Example sixteen

Based on the above embodiments, when the network side uses multiple antenna ports to send the ePDCCH signaling, it is not limited that the DL-Grant and the UL-Grant can only be transmitted by one layer at maximum, and the network side uses multiple antenna ports to transmit the ePDCCH signaling, and may map the DL-Grant or the UL-Grant to multiple antenna ports for transmission, that is, the DL-Grant and the UL-Grant may use multiple layers of transmission. At this time, an ePDCCH signaling (DL-Grant or UL-Grant) code word adopting A/2(0 < A < 1) code rate is mapped to a plurality of antenna ports or layers for transmission, or an ePDCCH code word adopting A (0 < A < 1) code rate is repeated into two code words which are respectively mapped to different antenna ports or layers for transmission.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention. The downlink control information configuration signaling scheme adopted in the present invention shall be included in the scope of the present invention.

Claims

1. A method for transmitting a control channel, the method comprising:

2. The method of claim 1,

3. The method of claim 1,

4. The method of claim 1, further comprising: the network side device informs the receiving side device of the port number adopted for blind detection or receiving ePDCCH information through RRC signaling and/or a codebook cluster restriction set,

5. The method of claim 1, wherein the receiving-side device receiving the related ePDCCH information from the transmission port of the ePDCCH is: according to the indication of the network side equipment or according to the standard convention, the receiving side equipment determines the port number adopted for blind detection or receiving the ePDCCH by using the rank indication RI and/or the channel quality information indication CQI which feeds back the PDSCH the last time, or determines the port number adopted for blind detection or receiving the ePDCCH by using the RI and/or the CQI information which feeds back the PDSCH the last time and the codebook cluster limiting set, and blindly detects or receives the related ePDCCH information from the corresponding port.

6. The method of any one of claims 1 to 5, further comprising:

7. The method according to any one of claims 1 to 5, wherein the network side device notifies the receiving side device, by configuring a downlink control information format, that blind detection on DCI format 1A in ePDCCH is performed only in an OCC-2 manner.

8. The method according to any one of claims 1 to 5, wherein the sending, by the network side device, the ePDCCH information in the PDSCH region by using at least one port is as follows: the network side equipment limits that different ePDCCH signaling can only be transmitted in one layer, and different ePDCCH signaling located in the same time frequency resource occupies different antenna ports.

9. The method according to any one of claims 1 to 5, wherein the sending, by the network side device, the ePDCCH information in the PDSCH region by using at least one port is as follows: the network side equipment limits different ePDCCH signaling to adopt N layers for transmission, one ePDCCH code word adopts a code rate of A to be mapped to the N layers for transmission, or one code word adopts a code rate of 2A, two code words are generated by repeating one time and then are respectively mapped to the N layers for transmission, wherein N is larger than 1, and 1 is larger than A and larger than 0.

10. A transmission system of a control channel is characterized in that the system comprises a network side device and a receiving side device; wherein,

11. The system of claim 10,

12. The system of claim 10,

13. The system of claim 10,

14. The system of claim 10, wherein the receiving side device receives the related ePDCCH information from the transmission port of the ePDCCH as: according to the indication of the network side equipment or according to the standard convention, the receiving side equipment determines the port number adopted for blind detection or receiving the ePDCCH by using the rank indication RI and/or the channel quality information indication CQI which feeds back the PDSCH the last time, or determines the port number adopted for blind detection or receiving the ePDCCH by using the RI and/or the CQI information which feeds back the PDSCH the last time and the codebook cluster limiting set, and blindly detects or receives the related ePDCCH information from the corresponding port.

15. The system according to any one of claims 10 to 14,

16. The system according to any one of claims 10 to 14,

17. The system according to any one of claims 10 to 14,

18. The system according to any one of claims 10 to 14, wherein the network side device uses at least one port to send ePDCCH information in the PDSCH region is: the network side equipment limits different ePDCCH signaling to adopt N layers for transmission, one ePDCCH code word adopts a code rate of A to be mapped to the N layers for transmission, or one code word adopts a code rate of 2A, two code words are generated by repeating one time and then are respectively mapped to the N layers for transmission, wherein N is larger than 1, and 1 is larger than A and larger than 0.

19. A network side device is characterized in that the network side device is used for sending ePDCCH information in a PDSCH region by adopting at least one port.

20. The network-side device of claim 19,

21. The network-side device of claim 19,

22. The network-side device of claim 19,

23. The network-side device of claim 19,

24. The network-side device of any one of claims 19 to 23,

25. The network-side device of any one of claims 19 to 23,

26. The network-side device of any one of claims 19 to 23,

27. The network-side device of any one of claims 19 to 23,

28. A receiving side device, wherein the receiving side device is configured to receive related ePDCCH information from a transmission port of an ePDCCH.

29. The reception-side apparatus according to claim 28,

30. The reception-side apparatus according to claim 28,

31. The reception-side apparatus according to claim 28,

32. The reception-side apparatus according to claim 28,

33. The reception-side apparatus according to claim 28 to 32,