CN102036297B - Method and equipment for transmitting PDCCH, method and equipment for detecting PDCCH, and system - Google Patents

Method and equipment for transmitting PDCCH, method and equipment for detecting PDCCH, and system Download PDF

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CN102036297B
CN102036297B CN201010606579.8A CN201010606579A CN102036297B CN 102036297 B CN102036297 B CN 102036297B CN 201010606579 A CN201010606579 A CN 201010606579A CN 102036297 B CN102036297 B CN 102036297B
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pdcch
carrier
base station
terminal
occupied
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CN102036297A (en
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潘学明
沈祖康
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to PCT/CN2011/082024 priority patent/WO2012083766A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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Abstract

The embodiment of the invention discloses a method and equipment for transmitting physical downlink control channel (PDCCH), a method and equipment for detecting the PDCCH, and a system in a long term evolution-advanced system, which are used for reducing working load of a stand-alone-capable carrier to which an extension carrier or carrier segments are attached, and relates to the technical field of wireless communication. In the invention, a base station transmits the PDCCH on the extension carrier or the carrier segments to schedule physical resources on the extension carrier or the carrier segments; and a terminal detects the PDCCH transmitted by the base station on the extension carrier or the carrier segments by using a demodulation pilot reference signal (DMRS); therefore, the physical resources on the extension carrier or the carrier segments are scheduled by the PDCCH transmitted on the extension carrier or the carrier segments, and the stand-alone-capable carrier does not need to schedule the physical resources on the extension carrier and/or the carrier segments bound with the stand-alone-capable carrier, so the working load of the stand-alone-capable carrier to which the extension carrier or the carrier segments are attached is greatly reduced.

Description

Physical downlink control channel sending and detecting method, system and equipment
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method, a system, and a device for sending and detecting a physical downlink control channel in a long term evolution (lte) upgrade system.
Background
In release 10(Rel-10) of the long term evolution advanced (LTE-a) system, each component carrier in the carrier aggregation satisfies the backward compatibility characteristic, i.e., each component carrier can work independently and access a terminal of release 8/9 (Rel-8/9).
Non-backward compatible carriers proposed in long term evolution advanced (LTE-a) systems mainly include two types of Extension carriers (Extension carriers) and Carrier Segments (Carrier Segments).
Among them, according to the already disclosed proposals, the extension carrier is a non-backward compatible carrier, cannot exist independently, and must work with backward-compatible (stand-alone-capable) carrier aggregation. The available bandwidth of one extension carrier is consistent with the bandwidth supported by release 8(Rel-8), i.e., {6, 15, 25, 50, 75, 100} RBs, and the sum of the bandwidth of one backward compatible carrier and one extension carrier may be greater than 110 RBs. The hybrid automatic repeat request (HARQ) process, resource scheduling, and configuration of transmission mode for one extension carrier are all independently performed. Since the extension carrier does not transmit a cell signature signal including a PSS, SSS, Broadcast Channel (BCH) signal, and the like, it is not possible to provide a terminal (UE) to camp on, and since many proposals indicate that the extension carrier should not transmit a pilot reference signal (CRS), a downlink control channel demodulated based on CRS cannot be transmitted on the extension carrier including a Physical Downlink Control Channel (PDCCH), a physical hybrid automatic repeat request indicator channel (PHICH), a PCFICH, and the like. Physical resources on one extension carrier are scheduled by an independent PDCCH, the PDCCH transmits on a backward compatible carrier to which the extension carrier is attached, and a cross-carrier scheduling mode is adopted. Fig. 1 shows an example of an extension carrier, in which only traffic data including data of a Physical Downlink Shared Channel (PDSCH) and a physical downlink shared channel (PUSCH) and a corresponding demodulation pilot (DMRS) are transmitted in the extension carrier.
In addition, according to the already disclosed proposals, the carrier segment cannot exist independently, but exists as a segment of physical resource attached to a certain backward compatible carrier, and strictly speaking, the carrier aggregation is not required by using the carrier segment. The bandwidth of a carrier segment can be arbitrarily configured but cannot exceed 110 RBs, and the sum of the bandwidth of a backward compatible carrier and the carrier segment or segments attached to it is no more than 110 RBs. A backward compatible carrier uses the same HARQ entity, with the same transmission mode, as the carrier fragment or fragments attached to it. No cell signature signals, including signals for PSS, SSS, BCH, CRS, etc., are transmitted within the carrier segment and do not provide for camping by the UE. And no PDCCH is sent in the carrier fragment, and the physical resources of the carrier fragment are scheduled by the PDCCH sent on the backward compatible carrier. Fig. 2 shows an example of a backward compatible carrier with two carrier segments bundled, where one PDCCH on the backward compatible carrier can simultaneously schedule itself and any physical resource on the two carrier segments for PDSCH or PUSCH transmission.
In Rel-10, 8 DMRS ports are defined for PDSCH transmission: the ports 7 to 14 support PDSCH transmission of the highest 8 ports. And, the DMRS sequence transmitted on each port is initialized with two different Scrambling sequences (Scrambling codes), which are SCID 0 and SCID 1, respectively.
In the process of implementing the invention, the inventor finds that the following technical problems exist in the prior art:
according to the prior art, a physical layer control channel (including a PDCCH, a PHICH, a PCFICH) is not sent on an extension carrier or a carrier segment, and a PDCCH on a backward compatible carrier to which the extension carrier or the carrier segment is attached is used for scheduling physical resources on the extension carrier or the carrier segment, so that the backward compatible carrier not only needs to schedule the physical resources of the carrier itself, but also needs to schedule the physical resources on the extension carrier and/or the carrier segment bound to the backward compatible carrier, and the workload of resource scheduling on the backward compatible carrier is large, which causes the PDCCH resources in the backward compatible carrier to be limited, and the collision probability to be increased, and the like.
Disclosure of Invention
The embodiment of the invention provides a method, a system and equipment for sending and detecting a physical downlink control channel in a long-term evolution upgrading system, which are used for reducing the working load of a backward compatible carrier attached to an extension carrier or a carrier segment.
A method for sending a Physical Downlink Control Channel (PDCCH) in a long-term evolution upgrading system comprises the following steps:
a base station determines physical resources occupied by sending a PDCCH on an extended carrier or a carrier fragment and generates a demodulation pilot signal DMRS for a terminal to detect the PDCCH;
the base station transmits the PDCCH and the DMRS to the terminal by using the physical resource on an extended carrier or a carrier fragment;
the base station determines physical resources occupied by sending the PDCCH on the extension carrier or the carrier fragment, including:
the base station determines the number of RBs required to be occupied according to the transmission code rate for transmitting the PDCCH, and selects the RBs with the number as frequency domain resources occupied by sending the PDCCH on an extended carrier or a carrier fragment in a specific frequency domain set in a system bandwidth;
the specific frequency domain set is sent to the terminal through protocol specification or through high-layer signaling by the base station.
A method for detecting a Physical Downlink Control Channel (PDCCH) in a long-term evolution upgrading system comprises the following steps:
a terminal determines physical resources occupied by a base station for sending a PDCCH on an extension carrier or a carrier fragment and generates a demodulation pilot signal DMRS;
the terminal detects the PDCCH sent by the base station on the extended carrier or the carrier fragment on the physical resource by using the DMRS;
the terminal uses the DMRS sequence to detect the PDCCH sent by the base station on the extension carrier or the carrier fragment on the physical resource, and the detection comprises the following steps:
the terminal performs blind detection on the PDCCH in a specific frequency domain RB set and receives the corresponding PDCCH;
the specific frequency domain set is known through protocol specification or according to higher layer signaling sent by the base station.
A Physical Downlink Control Channel (PDCCH) sending device in a long-term evolution upgrading system comprises:
a determining unit, configured to determine a physical resource occupied by sending a PDCCH on an extension carrier or a carrier segment, and generate a demodulation pilot signal DMRS for a terminal to detect the PDCCH;
a transmitting unit, configured to transmit the PDCCH and the DMRS to a terminal using the physical resource on an extension carrier or a carrier segment;
the determination unit is configured to:
determining the number of RBs to be occupied according to the transmission code rate of the transmission PDCCH, and selecting the RBs with the number in a specific frequency domain set in the system bandwidth as frequency domain resources occupied by sending the PDCCH on an extended carrier or a carrier fragment;
the specific frequency domain set is sent to the terminal through protocol specification or through higher layer RRC signaling.
A Physical Downlink Control Channel (PDCCH) detection device in a long-term evolution upgrading system comprises:
a determining unit, configured to determine a physical resource occupied by a base station for sending a PDCCH on an extension carrier or a carrier segment, and generate a demodulation pilot signal DMRS;
a detecting unit, configured to detect, on the physical resource, a PDCCH transmitted by the base station on the extension carrier or the carrier segment by using the DMRS;
the detection unit is used for: performing blind detection on the PDCCH in a specific frequency domain RB set, and receiving the corresponding PDCCH;
the specific frequency domain set is known through protocol specification or according to higher layer signaling sent by the base station.
In the invention, the base station sends the PDCCH on the extension carrier or the carrier fragment to schedule the physical resources on the extension carrier or the carrier fragment, and the terminal detects the PDCCH sent by the base station on the extension carrier or the carrier fragment by using the DMRS.
Drawings
Fig. 1 is a schematic diagram of an extension carrier in the prior art;
fig. 2 is a diagram of a carrier segment in the prior art;
FIG. 3 is a schematic flow chart of a method provided by an embodiment of the present invention;
FIG. 4 is a schematic flow chart of another method provided by the embodiment of the present invention;
fig. 5A is a schematic diagram of TDM adopted for a PDCCH and a PDSCH on an extension carrier in an embodiment of the present invention;
fig. 5B is a schematic diagram of an embodiment of the present invention in which FDM is used for a PDCCH and a PDSCH on an extension carrier;
fig. 5C is a schematic diagram of a PDCCH and a PDSCH on an extension carrier adopting TDM + FDM in the embodiment of the present invention;
FIG. 6 is a schematic diagram of a system according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
In order to reduce the workload of a backward compatible carrier to which an extension carrier or a carrier fragment is attached, an embodiment of the present invention provides a PDCCH transmission and detection method in a long term evolution upgrade system.
Referring to fig. 3, a PDCCH sending method in a long term evolution upgrade system according to an embodiment of the present invention specifically includes the following steps:
step 30: a base station determines physical resources occupied by sending a PDCCH on an extended carrier or a carrier fragment and generates a demodulation pilot signal DMRS for a terminal to detect the PDCCH;
step 31: and the base station transmits the PDCCH and the DMRS to the terminal by using the physical resource on an extension carrier or a carrier fragment.
In step 31, the base station transmits the PDCCH and the DMRS to the terminal on an extension carrier or a carrier segment using the physical resource through one or more downlink dedicated pilot ports.
Preferably, before the base station transmits the PDCCH and the DMRS to the terminal on an extension carrier or a carrier segment using the physical resource through one or more downlink dedicated pilot ports, the base station may transmit the number of the downlink dedicated pilot ports to the terminal through a higher layer Radio Resource Control (RRC) signaling; or, the number of the downlink dedicated pilot frequency ports and the number of the downlink dedicated pilot frequency ports are sent to a terminal through a high-level RRC signaling.
Here, the downlink dedicated pilot port is: downlink DMRS ports as defined in LTE system release 10. Specifically, the downlink dedicated pilot port is: and transmitting a DMRS port used by a Physical Downlink Shared Channel (PDSCH) on the extension carrier or the carrier segment.
In step 30, the base station generates a DMRS for the terminal to detect the PDCCH according to a preset Scrambling Code (Scrambling Code).
Preferably, before the base station transmits the PDCCH and the DMRS to the terminal using the physical resource on the extension carrier or the carrier segment, the base station may transmit information of the scrambling sequence to the terminal through a higher layer RRC signaling.
Preferably, before the base station transmits the PDCCH and the DMRS to the terminal using the physical resource on an extension carrier or a carrier segment, the base station may scramble the PDCCH using a Radio Network Temporary Identity (RNTI) of the terminal.
Preferably, the PDCCH is transmitted in Resource Block (RB) units on the extension carrier or carrier segment.
The base station sends PDCCH on the extension carrier or carrier fragment and PDSCH on the extension carrier or carrier fragment in a Time Division Multiplexing (TDM) mode, or a Frequency Division Multiplexing (FDM) mode, or a TDM plus FDM mode.
Preferably, if the PDCCH sent by the base station on the extension carrier or the carrier segment and the PDSCH sent by the base station on the extension carrier or the carrier segment adopt the TDM manner and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe, the base station may send start position information of an Orthogonal Frequency Division Multiplexing (OFDM) symbol occupied by the PDSCH to the terminal before the base station sends the PDCCH and the DMRS to the terminal on the extension carrier or the carrier segment by using the physical resource.
Preferably, if the PDCCH sent by the base station on the extension carrier or the carrier segment and the PDSCH sent by the base station on the extension carrier or the carrier segment adopt the FDM method, the PDCCH and the PDSCH occupy different RBs in the frequency domain.
The base station may send downlink resource scheduling DL Grant signaling in the first N1 OFDM symbols of the subframe, and send uplink resource scheduling UL Grant signaling in the last N2 OFDM symbols of the subframe, where N1 is an integer greater than 0 and less than the total number N of OFDM symbols included in the subframe, and N2 is an integer greater than 0 and not greater than N-N1. For example, N1 has a value of 7 and N2 has a value of 7.
Preferably, if the PDCCH sent by the base station on the extension carrier or the carrier segment and the PDSCH sent by the base station on the extension carrier or the carrier segment adopt the TDM plus FDM manner, and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe in the RB occupied by the PDCCH, the base station sends start position information of the OFDM symbol occupied by the PDSCH to the terminal in the RB occupied by the PDCCH before the base station sends the PDCCH and the DMRS to the terminal by using the physical resource on the extension carrier or the carrier segment.
Specifically, the base station may send start position information of the OFDM symbol occupied by the PDSCH to the terminal through PCFICH or higher layer RRC signaling.
In the invention, the base station can determine the number of RBs required to be occupied according to the transmission code rate for transmitting the PDCCH, and selects the RBs with the number as frequency domain resources occupied by sending the PDCCH on an extended carrier or a carrier fragment in a specific frequency domain set in a system bandwidth. Specifically, when determining the number of RBs to be occupied, the number of Resource Elements (REs) to be occupied may be determined according to the transmission code rate for transmitting the PDCCH, and then the number of RBs to be occupied may be determined according to the number of REs included in each RB. The specific frequency domain set is sent to the terminal through protocol specification or through high-layer RRC signaling by the base station.
Referring to fig. 4, an embodiment of the present invention further provides a PDCCH detection method in a long term evolution upgrade system, which specifically includes the following steps:
step 40: a terminal determines physical resources occupied by a base station for sending a PDCCH on an extended carrier or a carrier fragment and generates a DMRS sequence;
step 41: and the terminal detects the PDCCH sent by the base station on the extended carrier or the carrier fragment on the physical resource by using the DMRS sequence.
In step 41, the terminal may first determine a downlink dedicated pilot port used by the base station to send the PDCCH on the extension carrier or the carrier segment; then, the terminal detects the PDCCH sent by the base station on the extension carrier or the carrier segment on the physical resource by using the DMRS on the downlink dedicated pilot port.
The terminal determines a downlink dedicated pilot port used by the base station to send the PDCCH, and specifically may adopt the following two ways:
firstly, a terminal determines the number of downlink dedicated pilot frequency ports used by a base station for sending a PDCCH according to a high-level Radio Resource Control (RRC) signaling sent by the base station, determines the number of the downlink dedicated pilot frequency ports corresponding to the number of the downlink dedicated pilot frequency ports according to the preset corresponding relation between the number of the ports and the port number, and determines the downlink dedicated pilot frequency ports corresponding to the number of the downlink dedicated pilot frequency ports as the downlink dedicated pilot frequency ports used by the base station for sending the PDCCH on an extension carrier or a carrier fragment;
secondly, the terminal determines the number of the downlink dedicated pilot port used by the base station to transmit the PDCCH according to the high-level RRC signaling transmitted by the base station, and determines the downlink dedicated pilot port corresponding to the number of the downlink dedicated pilot port as the downlink dedicated pilot port used by the base station to transmit the PDCCH on the extension carrier or the carrier fragment.
Here, the downlink dedicated pilot port is: downlink DMRS ports as defined in long term evolution, LTE, system release 10. Specifically, the downlink dedicated pilot port is: and sending the DMRS port used by the PDSCH on the extension carrier or the carrier segment.
In step 40, the terminal generates the DMRS sequence according to a preset Scrambling Code or a Scrambling Code configured by the base station through a high layer RRC signaling.
In step 41, the terminal detects, on the physical resource, the PDCCH transmitted by the base station on the extension carrier or the carrier segment by using the DMRS sequence and the RNTI of the terminal.
In step 41, the terminal detects the PDCCH transmitted by the base station on the extension carrier or the carrier segment in units of RBs on the physical resource.
The PDCCH sent by the base station on the extension carrier or the carrier fragment and the PDSCH sent by the base station on the extension carrier or the carrier fragment adopt a TDM mode, an FDM mode or a TDM plus FDM mode.
If the PDCCH sent by the base station on the extension carrier or the carrier fragment and the PDSCH sent on the extension carrier or the carrier fragment adopt the TDM manner and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe, the terminal determines in step 40 that the physical resource occupied by the base station for sending the PDCCH on the extension carrier or the carrier fragment includes:
and the terminal determines that the base station sends the OFDM symbols occupied by the PDCCH on the extended carrier or the carrier fragment according to the received initial position information of the OFDM symbols occupied by the PDSCH sent by the base station, wherein the OFDM symbols are positioned in front of the OFDM symbols occupied by the PDSCH, and the terminal receives the PDCCH in front of the initial symbols occupied by the PDSCH in a subframe.
And if the PDCCH and the PDSCH sent on the extension carrier or the carrier fragment adopt an FDM mode, the terminal performs blind detection on the PDCCH by taking the RB as a unit.
In step 41, the terminal may detect DL Grant signaling in the first N1 OFDM symbols of the subframe and UL Grant signaling in the last N2 OFDM symbols of the subframe, where N1 is an integer greater than 0 and less than the total number N of OFDM symbols included in the subframe, and N2 is an integer greater than 0 and not greater than N-N1. For example, N1 has a value of 7 and N2 has a value of 7.
If the PDCCH and the PDSCH transmitted on the extension carrier or the carrier fragment adopt the TDM plus FDM method and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe in the RB occupied by the PDCCH, the terminal determines in step 40 that the physical resource occupied by the base station for transmitting the PDCCH on the extension carrier or the carrier fragment includes:
and the terminal determines that the base station sends the OFDM symbols occupied by the PDCCH on the extended carrier or the carrier fragment according to the received initial position information of the OFDM symbols occupied by the PDSCH in the RB occupied by the PDCCH, wherein the OFDM symbols are positioned in front of the OFDM symbols occupied by the PDSCH. The terminal receives the PDCCH in an OFDM symbol preceding a starting OFDM symbol occupied by the PDSCH in one subframe within an RB occupied by the PDCCH.
Specifically, the terminal receives the start position information of the OFDM symbol occupied by the PDSCH through a PCFICH or a higher layer RRC signaling sent by the base station.
In step 41, the terminal may perform blind detection on the PDCCH in the specific frequency domain RB set and receive the corresponding PDCCH. The specific frequency domain set is known through protocol specification or according to high layer RRC signaling sent by a base station.
The present invention is described in detail below:
the invention provides that PDCCH is sent on an extension carrier, and DMRS demodulation is carried out by using special pilot frequency, so that the extension carrier can schedule physical resources of the extension carrier through the PDCCH of the extension carrier. Wherein:
1. the PDCCH on the extension carrier is transmitted on a downlink dedicated pilot Port, which may be one or more DMRS ports (ports) defined by Rel-10. For example, PDCCH is transmitted using single Port, one of the downlink DMRS ports (ports 7, 8, 9, 10.., 14) defined by Rel-10, for example, Port 7. If the PDCCH is transmitted using two antenna ports, then transmission is done on two of the DMRS ports as above, e.g., Port 7, 8. If the PDCCH is transmitted using four antenna ports, then transmission is done on four of the DMRS ports as above, e.g., ports 7, 8, 9, 10.
2. The number of antenna ports used for transmitting PDCCH on the extension carrier is configured by higher layer RRC signaling. The specific antenna ports used may be fixed according to the number of antenna ports used, as described in example 1, or may be configured by the base station through higher layer RRC signaling.
3. The scid (screening id) sequence number used for transmitting PDCCH on the extension carrier may be fixed to 0 or 1, or configured by higher layer RRC signaling.
4. For one user, the relation between PDCCH (physical downlink control channel) and DMRS (demodulation reference signal) port of PDSCH (physical downlink shared channel) transmitted on extension carrier and aiming at the user is as follows
The PDCCH may be transmitted on one or more of the DMRS ports used by the PDSCH, e.g., PDSCH transmitted using ports 7 and 8, PDCCH transmitted using port 7.
5. The PDCCH transmitted on the extension carrier may be UE-specific only, scrambled by the RNTI (radio network temporary identity) of the target UE.
6. The PDCCH sent on the extension carrier is transmitted by taking RB as a unit, and the interleaving of REG level is not carried out.
7. On Extension Carrier, the multiplexing relationship between PDCCH and PDSCH can be TDM, i.e. PDCCH occupies OFDM symbol transmission before PDSCH in the whole system bandwidth, as shown in fig. 5A. In this case, the starting OFDM symbol of PDSCH may be indicated by PCFICH in the subframe, or the PDSCH starting position on Extension Carrier may be indicated by higher layer RRC signaling without transmitting PCFICH. The transmission resource of the PDCCH is N OFDM symbols (PCFICH or high-level signaling configuration) in the time domain and M RBs in the frequency domain, one PDCCH occupies one or more RBs according to different transmission code rates, and the UE performs PDCCH blind detection in the resource by using the RB as a unit.
For a UE, it may be specified in advance by a protocol in which frequency domain the UE performs PDCCH blind detection, or notified to the UE in advance by the base station.
8. The multiplexing relationship between PDCCH and PDSCH on the extension carrier may also be FDM, i.e. PDCCH occupies all OFDM symbols within one subframe and different RBs from PDSCH, as shown in fig. 5B. At this time, the resources of the PDCCH are all OFDM symbols in the time domain and M1 RBs in the frequency domain, one PDCCH occupies one or more RBs according to the difference of the transmission code rate, and the UE performs PDCCH blind detection in the resources by taking the RBs as a unit. Specifically, in order to reserve a sufficient processing time for the DL grant, the DL grant may be transmitted in the first N1 symbols of one subframe, for example, N1 ═ 7, i.e., the DL grant is transmitted in the first slot. And the UL grant may be transmitted in the entire subframe or the last N2 OFDM symbols, e.g., the UL grant is in the second slot.
For a UE, it may be specified in advance by a protocol in which frequency domain the UE performs PDCCH blind detection, or notified to the UE in advance by the base station.
9. The multiplexing relationship between the PDCCH and the PDSCH on the extension carrier may also be TDM + FDM, that is, the PDCCH occupies the first N3 OFDM symbols in one subframe in the time domain (for example, N3 ═ 7, that is, the PDCCH occupies the first slot), and the PDCCH occupies M2 RBs in the frequency domain for transmission. As shown in fig. 5C, within the PDCCH RB, the starting position of the PDSCH may be indicated by the PCFICH or indicated by the base station through higher layer RRC signaling. According to the difference of the transmission code rate, one PDCCH occupies one or more RBs, and the UE performs PDCCH blind detection in the resource by taking the RBs as units.
For a UE, it may be specified in advance by a protocol in which frequency domain the UE performs PDCCH blind detection, or notified to the UE in advance by the base station.
All the designs are described for the Extension Carrier as an example, and actually the related designs can be used for sending the PDCCH on the Carrier Segment resource, and the description is not repeated here.
Referring to fig. 6, an embodiment of the present invention further provides an LTE-a communication system, where the system includes:
a base station 60, configured to determine a physical resource occupied by sending a PDCCH on an extension carrier or a carrier segment, and generate a demodulation pilot signal DMRS for a terminal to detect the PDCCH; and transmitting the PDCCH and the DMRS to a terminal by using the physical resource on an extension carrier or a carrier segment.
And the terminal 61 is configured to determine a physical resource occupied by the base station for transmitting the PDCCH on the extension carrier or the carrier segment, generate a DMRS sequence, and detect, on the physical resource, the PDCCH transmitted by the base station on the extension carrier or the carrier segment by using the DMRS sequence.
Referring to fig. 7, an embodiment of the present invention further provides a PDCCH transmitting device in a long term evolution upgrade system, where the PDCCH transmitting device includes:
a determining unit 70, configured to determine a physical resource occupied by sending a PDCCH on an extension carrier or a carrier segment, and generate a demodulation pilot signal DMRS used for a terminal to detect the PDCCH;
a transmitting unit 71, configured to transmit the PDCCH and the DMRS to the terminal using the physical resource on an extension carrier or a carrier segment.
The sending unit 71 is configured to:
and transmitting the PDCCH and the DMRS to the terminal by using the physical resource of the transmitting unit on an extension carrier or a carrier segment through one or more downlink dedicated pilot ports.
The apparatus further comprises:
a first configuration unit 72, configured to send the number of downlink dedicated pilot ports to a terminal through a higher layer radio resource control RRC signaling before sending the PDCCH and the DMRS to the terminal on an extension carrier or a carrier segment using the physical resource through one or more downlink dedicated pilot ports; or,
and sending the number of the downlink special pilot frequency ports and the serial number of the downlink special pilot frequency ports to a terminal through a high-level Radio Resource Control (RRC) signaling.
The determining unit 70 is configured to:
and generating the DMRS for the terminal to detect the PDCCH according to a preset Scrambling sequence Scrambling Code.
The apparatus further comprises:
a second configuring unit 73, configured to send, to the terminal through a higher layer RRC signaling, information of the scrambling sequence before sending the PDCCH and the DMRS to the terminal using the physical resource on an extension carrier or a carrier segment.
The sending unit 71 is further configured to:
and scrambling the PDCCH by using a Radio Network Temporary Identifier (RNTI) of the terminal before transmitting the PDCCH and the DMRS to the terminal by using the physical resource on an extended carrier or a carrier fragment.
The sending unit 71 is configured to:
and transmitting the PDCCH by taking a Resource Block (RB) as a unit on the extension carrier or the carrier fragment.
The apparatus further comprises:
a third configuring unit 74, configured to send, to the terminal, start position information of an orthogonal frequency division multiplexing OFDM symbol occupied by the PDSCH before the PDCCH and the DMRS are sent to the terminal on the extension carrier or the carrier segment by using the physical resource when the PDCCH and the PDSCH sent on the extension carrier or the carrier segment adopt a time division multiplexing TDM manner and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe.
And when the PDCCH and the PDSCH sent on the extension carrier or the carrier fragment adopt a Frequency Division Multiplexing (FDM) mode, the PDCCH and the PDSCH occupy different RBs on a frequency domain.
The sending unit 71 is configured to:
and transmitting downlink resource scheduling (DL) Grant signaling in the first N1 OFDM symbols of the subframe, and transmitting uplink resource scheduling (UL) Grant signaling in the last N2 OFDM symbols of the subframe, wherein N1 is an integer which is more than 0 and less than the total number N of the OFDM symbols contained in the subframe, and N2 is an integer which is more than 0 and not more than N-N1.
The value of N1 is 7, and the value of N2 is 7.
The apparatus further comprises:
a fourth configuration unit 75, configured to send, to the terminal, start position information of the OFDM symbol occupied by the PDSCH within the RB occupied by the PDCCH before the PDCCH and the DMRS are sent to the terminal on the extension carrier or the carrier segment by using the physical resource when the PDCCH and the PDSCH sent on the extension carrier or the carrier segment adopt the TDM plus FDM manner and occupies the OFDM symbol before the OFDM symbol occupied by the PDSCH within the same subframe in the RB occupied by the PDCCH.
The third configuration unit 74 or the fourth configuration unit 75 is configured to:
and sending the start position information of the OFDM symbols occupied by the PDSCH to a terminal through PCFICH or high-level RRC signaling.
The determining unit 70 is configured to:
and determining the number of RBs required to be occupied according to the transmission code rate for transmitting the PDCCH, and selecting the RBs with the number in a specific frequency domain set in the system bandwidth as frequency domain resources occupied by sending the PDCCH on the extended carrier or the carrier fragment.
The specific frequency domain set is sent to the terminal through protocol specification or through higher layer RRC signaling.
Referring to fig. 8, an embodiment of the present invention further provides a PDCCH detecting apparatus in a long term evolution upgrade system, where the apparatus includes:
a determining unit 80, configured to determine a physical resource occupied by the base station for sending the PDCCH on the extension carrier or the carrier segment, and generate a demodulation pilot signal DMRS sequence;
a detecting unit 81, configured to detect, on the physical resource, a PDCCH transmitted by the base station on the extension carrier or the carrier segment by using the DMRS sequence.
The detection unit 81 is configured to:
determining a downlink special pilot frequency port used by the base station for sending the PDCCH on the extension carrier or the carrier fragment;
and detecting the PDCCH sent by the base station on the extension carrier or the carrier segment by using the DMRS sequence on the physical resource at the downlink special pilot port.
The detection unit 81 is configured to:
determining the number of downlink dedicated pilot frequency ports used by the base station for sending the PDCCH according to a high-level Radio Resource Control (RRC) signaling sent by the base station, determining the number of the downlink dedicated pilot frequency ports corresponding to the number of the downlink dedicated pilot frequency ports according to the preset corresponding relation between the number of the ports and the port number, and determining the downlink dedicated pilot frequency ports corresponding to the number of the downlink dedicated pilot frequency ports as the downlink dedicated pilot frequency ports used by the base station for sending the PDCCH on the extension carrier or the carrier fragment; or,
and determining a downlink special pilot frequency port used by the base station for transmitting the PDCCH according to the high-level RRC signaling transmitted by the base station.
The determination unit 80 is configured to:
and generating the DMRS sequence according to a preset Scrambling sequence Scrambling Code or a Scrambling sequence configured by the base station through high-level RRC signaling.
The detection unit 81 is configured to:
and on the physical resource, detecting the PDCCH sent by the base station on the extended carrier or the carrier fragment by using the DMRS sequence and the Radio Network Temporary Identifier (RNTI) of the equipment.
The detection unit 81 is configured to:
and detecting the PDCCH sent by the base station on the extension carrier or the carrier fragment by taking a Resource Block (RB) as a unit on the physical resource.
The determination unit 80 is configured to:
when the PDCCH and the PDSCH sent on the extension carrier or the carrier fragment adopt a Time Division Multiplexing (TDM) mode and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe, determining that the OFDM symbol occupied by the PDCCH sent by the base station on the extension carrier or the carrier fragment is sent by the base station according to the received initial position information of the OFDM symbol occupied by the PDSCH sent by the base station, wherein the OFDM symbol is positioned before the OFDM symbol occupied by the PDSCH.
The detection unit 81 is configured to:
if the PDCCH and the PDSCH transmitted on the extension carrier or the carrier segment adopt the FDM mode, detecting downlink resource scheduling DL Grant signaling in the first N1 OFDM symbols of the subframe, and detecting uplink resource scheduling UL Grant signaling in the last N2 OFDM symbols of the subframe, where N1 is an integer greater than 0 and less than the total number N of OFDM symbols included in the subframe, and N2 is an integer greater than 0 and not greater than N-N1.
The value of N1 is 7, and the value of N2 is 7.
The determination unit 80 is configured to:
and when the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe in the RB occupied by the PDCCH and the PDSCH sent on the extended carrier or the carrier fragment, determining that the base station sends the OFDM symbol occupied by the PDCCH on the extended carrier or the carrier fragment and the PDCCH occupies the OFDM symbol before the OFDM symbol occupied by the PDSCH in the RB occupied by the PDCCH according to the received initial position information of the OFDM symbol occupied by the PDSCH sent by the base station in the RB occupied by the PDCCH.
The determination unit 80 is configured to: and receiving the initial position information of the OFDM symbols occupied by the PDSCH through PCFICH or high-level RRC signaling sent by the base station.
The PDCCH sending device in the long term evolution upgrading system provided by the embodiment of the present invention may specifically be a base station. The PDCCH detection device in the lte-advanced system may specifically be a terminal.
In conclusion, the beneficial effects of the invention include:
in the scheme provided by the embodiment of the invention, the base station sends the PDCCH on the extension carrier or the carrier fragment to schedule the physical resources on the extension carrier or the carrier fragment, and the terminal detects the PDCCH sent by the base station on the extension carrier or the carrier fragment by using the DMRS.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (54)

1. A method for sending a Physical Downlink Control Channel (PDCCH) in a Long Term Evolution (LTE) upgrading system is characterized by comprising the following steps:
a base station determines physical resources occupied by sending a PDCCH on an extended carrier or a carrier fragment and generates a demodulation pilot signal DMRS for a terminal to detect the PDCCH;
the base station transmits the PDCCH and the DMRS to the terminal by using the physical resource on an extended carrier or a carrier fragment;
the base station determines physical resources occupied by sending the PDCCH on the extension carrier or the carrier fragment, including:
the base station determines the number of RBs required to be occupied according to the transmission code rate for transmitting the PDCCH, and selects the RBs with the number as frequency domain resources occupied by sending the PDCCH on an extended carrier or a carrier fragment in a specific frequency domain set in a system bandwidth;
the specific frequency domain set is sent to the terminal through protocol specification or through high-layer signaling by the base station.
2. The method of claim 1, wherein a base station transmits the PDCCH and the DMRS to a terminal on an extension carrier or carrier segment using the physical resources through one or more downlink dedicated pilot ports.
3. The method of claim 2, wherein prior to the base station transmitting the PDCCH and the DMRS to the terminal on an extension carrier or carrier segment using the physical resource through one or more downlink dedicated pilot ports, the method further comprises:
the base station sends the number of the special downlink pilot frequency ports to the terminal through a high-level Radio Resource Control (RRC) signaling; or,
and the base station sends the number of the downlink special pilot frequency ports and the serial number of the downlink special pilot frequency ports to a terminal through a high-level Radio Resource Control (RRC) signaling.
4. The method of claim 2, wherein the downlink dedicated pilot port is:
downlink DMRS ports as defined in long term evolution, LTE, system release 10.
5. The method of claim 4, wherein the downlink dedicated pilot port is: and sending the DMRS port used by the PDSCH on the extension carrier or the carrier segment.
6. The method of claim 1, wherein a base station generates the DMRS for the terminal to detect the PDCCH according to a preset Scrambling sequence Scrambling Code.
7. The method of claim 6, wherein prior to the base station transmitting the PDCCH and the DMRS to the terminal using the physical resource on an extension carrier or carrier segment, the method further comprises:
and the base station sends the information of the scrambling sequence to the terminal through high-level RRC signaling.
8. The method of claim 1, wherein prior to the base station transmitting the PDCCH and the DMRS to the terminal using the physical resource on an extension carrier or carrier segment, the method further comprises:
and the base station scrambles the PDCCH by using the Radio Network Temporary Identifier (RNTI) of the terminal.
9. The method of claim 1, wherein the PDCCH is transmitted in resource block, RB, units on the extension carrier or carrier segment.
10. The method of claim 1, wherein the PDCCH and the PDSCH transmitted on the extension carrier or carrier segment employ a time division multiplexing, TDM, or a frequency division multiplexing, FDM, or a TDM plus FDM approach.
11. The method of claim 10, wherein if the PDCCH and the PDSCH transmitted on the extension carrier or carrier segment are in TDM fashion and the PDCCH occupies OFDM symbols preceding the OFDM symbols occupied by the PDSCH in the same subframe, before the base station transmits the PDCCH and the DMRS to the terminal on the extension carrier or carrier segment using the physical resources, the method further comprises:
and the base station sends the initial position information of the orthogonal frequency division multiplexing OFDM symbol occupied by the PDSCH to the terminal.
12. The method of claim 10, wherein the PDCCH and the PDSCH occupy different RBs in a frequency domain if the PDCCH and the PDSCH transmitted on the extension carrier or carrier segment are in FDM format.
13. The method of claim 12, wherein the base station transmitting the PDCCH to the terminal on an extension carrier or carrier segment using the physical resource comprises:
the base station sends downlink resource scheduling (DL) Grant signaling in the first N1 OFDM symbols of the subframe, and sends uplink resource scheduling (UL) Grant signaling in the last N2 OFDM symbols of the subframe, wherein N1 is an integer which is greater than 0 and less than the total number N of the OFDM symbols contained in the subframe, and N2 is an integer which is greater than 0 and not greater than N-N1.
14. The method of claim 13, wherein N1 has a value of 7 and N2 has a value of 7.
15. The method of claim 10, wherein if the PDCCH and the PDSCH transmitted on the extension carrier or carrier segment are in TDM plus FDM mode and the PDCCH occupies OFDM symbols preceding the OFDM symbols occupied by the PDSCH in the same subframe within RBs occupied by the PDCCH, before the base station transmits the PDCCH and the DMRS to the terminal on the extension carrier or carrier segment using the physical resources, the method further comprises:
and the base station sends the initial position information of the OFDM symbols occupied by the PDSCH in the RB occupied by the PDCCH to the terminal.
16. The method of claim 11 or 15, wherein the base station transmits start position information of the OFDM symbols occupied by the PDSCH to the terminal through PCFICH or higher layer RRC signaling.
17. A method for detecting a Physical Downlink Control Channel (PDCCH) in a Long Term Evolution (LTE) upgrading system is characterized by comprising the following steps:
a terminal determines physical resources occupied by a base station for sending a PDCCH on an extended carrier or a carrier fragment and generates a demodulation pilot signal DMRS sequence;
the terminal detects the PDCCH sent by the base station on the extended carrier or the carrier fragment on the physical resource by using the DMRS sequence;
the terminal uses the DMRS sequence to detect the PDCCH sent by the base station on the extension carrier or the carrier fragment on the physical resource, and the detection comprises the following steps:
the terminal performs blind detection on the PDCCH in a specific frequency domain RB set and receives the corresponding PDCCH;
the specific frequency domain set is known through protocol specification or according to higher layer signaling sent by the base station.
18. The method of claim 17, wherein the terminal detecting, on the physical resources, the PDCCH sent by the base station on the extension carrier or carrier segment using the DMRS sequence comprises:
the terminal determines a downlink special pilot frequency port used by the base station for sending the PDCCH on the extended carrier or the carrier fragment;
and the terminal detects the PDCCH sent by the base station on the extended carrier or the carrier fragment on the physical resource by using the DMRS sequence at the downlink special pilot port.
19. The method of claim 18, wherein the terminal determining a downlink dedicated pilot port used by the base station to transmit the PDCCH comprises:
the terminal determines the number of downlink special pilot frequency ports used by the base station for sending the PDCCH according to a high-level Radio Resource Control (RRC) signaling sent by the base station, determines the number of the downlink special pilot frequency ports corresponding to the number of the downlink special pilot frequency ports according to the preset corresponding relation between the number of the ports and the port number, and determines the downlink special pilot frequency ports corresponding to the downlink special pilot frequency ports as the downlink special pilot frequency ports used by the base station for sending the PDCCH on the extension carrier or the carrier fragment; or,
the terminal determines the number of the downlink special pilot frequency port used by the base station for sending the PDCCH according to the high-level RRC signaling sent by the base station, and determines the downlink special pilot frequency port corresponding to the number of the downlink special pilot frequency port as the downlink special pilot frequency port used by the base station for sending the PDCCH on the extended carrier or the carrier fragment.
20. The method of claim 18, wherein the downlink dedicated pilot port is:
downlink DMRS ports as defined in long term evolution, LTE, system release 10.
21. The method of claim 20, wherein the downlink dedicated pilot port is:
and sending the DMRS port used by the PDSCH on the extension carrier or the carrier segment.
22. The method of claim 17, wherein the terminal generating the DMRS sequence comprises:
and the terminal generates the DMRS sequence according to a preset Scrambling sequence Scrambling Code or a Scrambling sequence configured by the base station through high-level RRC signaling.
23. The method of claim 17, wherein the terminal detecting, on the physical resources, the PDCCH sent by the base station on the extension carrier or carrier segment using the DMRS sequence comprises:
and the terminal detects the PDCCH sent by the base station on the extended carrier or the carrier fragment by using the DMRS sequence and the Radio Network Temporary Identifier (RNTI) of the terminal on the physical resources.
24. The method of claim 17, wherein the terminal detecting, on the physical resources, the PDCCH sent by the base station on the extension carrier or carrier segment using the DMRS sequence comprises:
and the terminal uses the DMRS sequence to detect the PDCCH sent by the base station on the extension carrier or the carrier fragment by taking a Resource Block (RB) as a unit on the physical resource.
25. The method of claim 17, wherein the PDCCH and the PDSCH transmitted by the base station on the extension carrier or carrier segment are in a time division multiplexing, TDM, or frequency division multiplexing, FDM, or TDM plus FDM manner.
26. The method of claim 25, wherein if the PDCCH and the PDSCH transmitted on the extension carrier or carrier segment are in TDM manner and the PDCCH occupies an OFDM symbol preceding the OFDM symbol occupied by the PDSCH in the same subframe, the determining, by the terminal, the physical resource occupied by the base station for transmitting the PDCCH on the extension carrier or carrier segment includes:
and the terminal determines that the base station sends the OFDM symbols occupied by the PDCCH on the extended carrier or the carrier fragment according to the received initial position information of the OFDM symbols occupied by the PDSCH sent by the base station, wherein the OFDM symbols are positioned in front of the OFDM symbols occupied by the PDSCH.
27. The method of claim 25, wherein if the PDCCH is in FDM format with a PDSCH transmitted on the extension carrier or carrier segment, the terminal detecting the PDCCH transmitted by the base station on the extension carrier or carrier segment using the DMRS sequence on the physical resources comprises:
the terminal detects downlink resource scheduling (DL) Grant signaling in the first N1 OFDM symbols of the subframe, and detects uplink resource scheduling (UL) Grant signaling in the last N2 OFDM symbols of the subframe, wherein N1 is an integer which is greater than 0 and less than the total number N of the OFDM symbols contained in the subframe, and N2 is an integer which is greater than 0 and not greater than N-N1.
28. The method of claim 27, wherein N1 has a value of 7 and N2 has a value of 7.
29. The method of claim 25, wherein if the PDCCH and the PDSCH transmitted on the extension carrier or the carrier segment adopt a TDM plus FDM manner and the PDCCH occupies an OFDM symbol preceding the OFDM symbol occupied by the PDSCH in the same subframe within the RB occupied by the PDCCH, the determining, by the terminal, the physical resource occupied by the base station for transmitting the PDCCH on the extension carrier or the carrier segment includes:
and the terminal determines that the base station transmits the OFDM symbols occupied by the PDCCH in the RB on the extended carrier or the carrier fragment according to the received initial position information of the OFDM symbols occupied by the PDSCH in the RB occupied by the PDCCH, wherein the OFDM symbols are positioned in front of the OFDM symbols occupied by the PDSCH.
30. The method of claim 26 or 29, wherein the terminal receives the starting position information of the OFDM symbol occupied by the PDSCH through a PCFICH or a higher layer RRC signaling transmitted by the base station.
31. A Physical Downlink Control Channel (PDCCH) sending device in a long term evolution upgrading system is characterized by comprising:
a determining unit, configured to determine a physical resource occupied by sending a PDCCH on an extension carrier or a carrier segment, and generate a demodulation pilot signal DMRS for a terminal to detect the PDCCH;
a transmitting unit, configured to transmit the PDCCH and the DMRS to a terminal using the physical resource on an extension carrier or a carrier segment;
the determination unit is configured to:
determining the number of RBs to be occupied according to the transmission code rate of the transmission PDCCH, and selecting the RBs with the number in a specific frequency domain set in the system bandwidth as frequency domain resources occupied by sending the PDCCH on an extended carrier or a carrier fragment;
the specific frequency domain set is sent to the terminal through protocol specification or through higher layer RRC signaling.
32. The apparatus of claim 31, wherein the sending unit is to:
and transmitting the PDCCH and the DMRS to a terminal by using the physical resource of the transmitting unit on an extension carrier or a carrier segment through one or more downlink dedicated pilot ports.
33. The apparatus of claim 32, further comprising:
a first configuration unit, configured to send the number of downlink dedicated pilot ports to a terminal through a higher layer radio resource control RRC signaling before sending the PDCCH and the DMRS to the terminal on an extended carrier or a carrier segment using the physical resource through one or more downlink dedicated pilot ports; or,
and sending the number of the downlink special pilot frequency ports and the serial number of the downlink special pilot frequency ports to a terminal through a high-level Radio Resource Control (RRC) signaling.
34. The apparatus of claim 31, wherein the determination unit is to:
and generating the DMRS for the terminal to detect the PDCCH according to a preset Scrambling sequence Scrambling Code.
35. The apparatus of claim 34, further comprising:
and a second configuration unit, configured to send, through a higher layer RRC signaling, the information of the scrambling sequence to the terminal before sending the PDCCH and the DMRS to the terminal using the physical resource on an extension carrier or a carrier segment.
36. The apparatus of claim 31, wherein the sending unit is further configured to:
and scrambling the PDCCH by using a Radio Network Temporary Identifier (RNTI) of the terminal before transmitting the PDCCH and the DMRS to the terminal by using the physical resource on an extended carrier or a carrier fragment.
37. The apparatus of claim 31, wherein the sending unit is to:
and transmitting the PDCCH by taking a Resource Block (RB) as a unit on the extension carrier or the carrier fragment.
38. The apparatus of claim 31, further comprising:
and a third configuration unit, configured to send, to the terminal, start position information of an orthogonal frequency division multiplexing OFDM symbol occupied by the PDSCH before the PDCCH and the DMRS are sent to the terminal on an extension carrier or a carrier segment by using the physical resource when the PDCCH and the PDSCH sent on the extension carrier or the carrier segment adopt a time division multiplexing TDM manner and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe.
39. The apparatus of claim 31, wherein the PDCCH and the PDSCH transmitted on the extension carrier or carrier segment occupy different RBs in a frequency domain when the PDCCH and the PDSCH employ a frequency division multiplexing, FDM, approach.
40. The device of claim 39, wherein the sending unit is to:
and transmitting downlink resource scheduling (DL) Grant signaling in the first N1 OFDM symbols of the subframe, and transmitting uplink resource scheduling (UL) Grant signaling in the last N2 OFDM symbols of the subframe, wherein N1 is an integer which is more than 0 and less than the total number N of the OFDM symbols contained in the subframe, and N2 is an integer which is more than 0 and not more than N-N1.
41. The apparatus of claim 40, wherein N1 has a value of 7 and N2 has a value of 7.
42. The apparatus of claim 31, further comprising:
and a fourth configuration unit, configured to send start position information of the OFDM symbol occupied by the PDSCH to the terminal in the RB occupied by the extended carrier or the carrier segment before the PDCCH and the DMRS are sent to the terminal in the RB occupied by the PDCCH using the physical resource on the extended carrier or the carrier segment when the PDCCH and the PDSCH sent on the extended carrier or the carrier segment adopt a TDM plus FDM manner and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe.
43. The apparatus of claim 38 or 42, wherein the third configuration unit or fourth configuration unit is to:
and sending the start position information of the OFDM symbols occupied by the PDSCH to a terminal through PCFICH or high-level RRC signaling.
44. A Physical Downlink Control Channel (PDCCH) detection device in a Long Term Evolution (LTE) upgrading system is characterized by comprising:
a determining unit, configured to determine a physical resource occupied by a base station for sending a PDCCH on an extension carrier or a carrier segment, and generate a demodulation pilot signal DMRS sequence;
a detecting unit, configured to detect, on the physical resource, a PDCCH transmitted by the base station on the extension carrier or the carrier segment by using the DMRS sequence;
the detection unit is used for: performing blind detection on the PDCCH in a specific frequency domain RB set, and receiving the corresponding PDCCH;
the specific frequency domain set is known through protocol specification or according to higher layer signaling sent by the base station.
45. The device of claim 44, wherein the detection unit is to:
determining a downlink special pilot frequency port used by the base station for sending the PDCCH on the extension carrier or the carrier fragment;
and detecting the PDCCH sent by the base station on the extension carrier or the carrier segment by using the DMRS sequence on the physical resource at the downlink special pilot port.
46. The device of claim 45, wherein the detection unit is to:
determining the number of downlink dedicated pilot frequency ports used by the base station for sending the PDCCH according to a high-level Radio Resource Control (RRC) signaling sent by the base station, determining the number of the downlink dedicated pilot frequency ports corresponding to the number of the downlink dedicated pilot frequency ports according to the preset corresponding relation between the number of the ports and the port number, and determining the downlink dedicated pilot frequency ports corresponding to the number of the downlink dedicated pilot frequency ports as the downlink dedicated pilot frequency ports used by the base station for sending the PDCCH on the extension carrier or the carrier fragment; or,
and determining the number of a downlink special pilot frequency port used by the base station for transmitting the PDCCH according to the high-level RRC signaling transmitted by the base station, and determining the downlink special pilot frequency port corresponding to the number of the downlink special pilot frequency port as the downlink special pilot frequency port used by the base station for transmitting the PDCCH on the extension carrier or the carrier fragment.
47. The apparatus of claim 44, wherein the determination unit is to:
and generating the DMRS sequence according to a preset Scrambling sequence Scrambling Code or a Scrambling sequence configured by the base station through high-level RRC signaling.
48. The device of claim 44, wherein the detection unit is to:
and on the physical resource, detecting the PDCCH sent by the base station on the extended carrier or the carrier fragment by using the DMRS sequence and the Radio Network Temporary Identifier (RNTI) of the equipment.
49. The device of claim 44, wherein the detection unit is to:
and detecting the PDCCH sent by the base station on the extension carrier or the carrier fragment by using the DMRS sequence on the physical resource by taking a Resource Block (RB) as a unit.
50. The apparatus of claim 44, wherein the determination unit is to:
when the PDCCH and the PDSCH sent on the extension carrier or the carrier fragment adopt a Time Division Multiplexing (TDM) mode and the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe, determining that the base station sends the OFDM symbol occupied by the PDCCH on the extension carrier or the carrier fragment according to the received initial position information of the OFDM symbol occupied by the PDSCH sent by the base station, wherein the OFDM symbol is positioned before the OFDM symbol occupied by the PDSCH.
51. The device of claim 44, wherein the detection unit is to:
if the PDCCH and the PDSCH transmitted on the extension carrier or the carrier segment adopt the FDM mode, detecting downlink resource scheduling DL Grant signaling in the first N1 OFDM symbols of the subframe, and detecting uplink resource scheduling UL Grant signaling in the last N2 OFDM symbols of the subframe, where N1 is an integer greater than 0 and less than the total number N of OFDM symbols included in the subframe, and N2 is an integer greater than 0 and not greater than N-N1.
52. The apparatus of claim 51, wherein N1 has a value of 7 and N2 has a value of 7.
53. The apparatus of claim 44, wherein the determination unit is to:
and when the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe in the RB occupied by the PDCCH, determining that the base station transmits the OFDM symbol occupied by the PDCCH on the extension carrier or the carrier fragment and the PDCCH occupies the OFDM symbol before the OFDM symbol occupied by the PDSCH in the RB occupied by the PDCCH according to the received initial position information of the OFDM symbol occupied by the PDSCH in the RB occupied by the PDCCH, which is transmitted by the base station.
54. The apparatus of claim 50 or 53, wherein the determination unit is to:
and receiving the initial position information of the OFDM symbols occupied by the PDSCH through PCFICH or high-level RRC signaling sent by the base station.
CN201010606579.8A 2010-12-24 2010-12-24 Method and equipment for transmitting PDCCH, method and equipment for detecting PDCCH, and system Active CN102036297B (en)

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Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102036297B (en) * 2010-12-24 2013-08-14 大唐移动通信设备有限公司 Method and equipment for transmitting PDCCH, method and equipment for detecting PDCCH, and system
CN115767752A (en) 2011-02-11 2023-03-07 交互数字专利控股公司 System and method for enhanced control channel
CN102170703A (en) * 2011-05-11 2011-08-31 电信科学技术研究院 Method for receiving and transmitting information on physical downlink control channel and equipment thereof
CN102857458B (en) * 2011-06-30 2018-01-02 中兴通讯股份有限公司 Frequency pilot sign determines method and device
CN102882566A (en) * 2011-07-12 2013-01-16 华为技术有限公司 Method and equipment for reducing transmission interlamination interference in multi-user MIMO (Multiple Input Multiple Output) system
WO2013009145A2 (en) 2011-07-14 2013-01-17 엘지전자 주식회사 Method and device for setting a control channel and a data channel in a wireless communication system
CN107104912B (en) * 2011-07-15 2020-07-28 太阳专利信托公司 Transmission device, reception device, transmission method, reception method, and integrated circuit
US11974295B2 (en) 2011-07-25 2024-04-30 Nec Corporation Communication system
GB2493154A (en) 2011-07-25 2013-01-30 Nec Corp Communicating control channel reference signal patterns in the control region of a sub-frame in a cellular communication system
US9379864B2 (en) 2011-08-05 2016-06-28 Telefonaktiebolaget L M Ericsson Reference signal generation technique
CN102932090B (en) 2011-08-08 2016-07-13 华为技术有限公司 Detection, the method and apparatus of transmission information
CN102355732A (en) * 2011-08-12 2012-02-15 电信科学技术研究院 Downlink control information transmission method and device
TW202239167A (en) * 2011-08-12 2022-10-01 美商內數位專利控股公司 Method And Apparatus For Monitoring At Least One Physical Control Channel Using A Pilot Signal
US9831989B2 (en) 2011-10-09 2017-11-28 Lg Electronics Inc. Method for setting starting position of data channel in wireless communication system and device using method
CN102378378B (en) * 2011-11-01 2015-02-18 新邮通信设备有限公司 Method for extending physical downlink control channels
CN102395206B (en) * 2011-11-08 2015-07-15 电信科学技术研究院 Transmission method and equipment for downside control information
CN105490796B (en) * 2012-01-09 2018-11-09 华为技术有限公司 A kind of control channel transmission, method of reseptance and base station, user equipment
CN103220249B (en) * 2012-01-19 2018-04-06 中兴通讯股份有限公司 A kind of transmission of information, collocation method and device
KR101995800B1 (en) * 2012-01-19 2019-07-04 삼성전자 주식회사 Apparatus and method for pilot scrambling for enhanced physical downlink control channels
CN113225172B (en) * 2012-01-27 2024-05-24 交互数字专利控股公司 Method performed by a WTRU for ePDCCH
CN103248468B (en) * 2012-02-01 2017-04-12 华为技术有限公司 Demodulation pilot signal processing method, base station and user equipment
JP5890743B2 (en) * 2012-03-09 2016-03-22 Kddi株式会社 Wireless communication system, terminal, transmission station, and wireless communication program
CN103327629B (en) * 2012-03-21 2016-12-14 中国移动通信集团公司 Generate DMRS sequence, the method sending DMRS sequence initial value and terminal, base station
CN103368714B (en) * 2012-03-26 2016-12-14 华为技术有限公司 Determine method and the communication equipment of public search space position
CN103391155B (en) * 2012-05-11 2016-12-14 华为技术有限公司 The collocation method of reference signal, base station and subscriber equipment
WO2013170426A1 (en) * 2012-05-14 2013-11-21 Nokia Corporation Method for time division duplex uplink-downlink configuration indication
CN103457710B (en) * 2012-06-01 2017-02-08 华为技术有限公司 Method, device and system for enabling enhancement mode physical downlink control channel
JP5781028B2 (en) * 2012-07-23 2015-09-16 株式会社Ｎｔｔドコモ Wireless communication method, wireless base station, user terminal, and wireless communication system
WO2014019181A1 (en) * 2012-08-01 2014-02-06 华为技术有限公司 Transmission method and device for control channel
CN103686772A (en) 2012-09-20 2014-03-26 中兴通讯股份有限公司 Enhancement downlink control channel configuration and detection methods and device, base station and terminal
CN103781160B (en) * 2012-10-23 2017-06-20 华为技术有限公司 The transmission method and device of data
CN103873183B (en) * 2012-12-07 2017-03-01 电信科学技术研究院 A kind of data transmission method and device
CN103944847B (en) * 2013-01-18 2019-06-18 中兴通讯股份有限公司 Frequency pilot sign carrying and processing method, device
CN106160986B (en) * 2015-04-21 2019-08-16 电信科学技术研究院 A kind of data transmission method and device
CN106656439B (en) * 2015-07-14 2019-11-12 普天信息技术有限公司 Shared band downlink multi-subband resource allocation methods and base station
EP3243293B1 (en) 2015-10-17 2018-08-29 Comcast Cable Communications, LLC Control channel configuration in partial and full subframes
US10420088B2 (en) * 2016-06-06 2019-09-17 Qualcomm Incorporated Downlink slot structure, channel placement, and processing timeline options
CN107623564B (en) * 2016-07-13 2019-05-07 上海朗帛通信技术有限公司 A kind of method and apparatus in wireless communication
KR20220011215A (en) * 2017-08-10 2022-01-27 미쓰비시덴키 가부시키가이샤 Transmission device
CN110035506B (en) * 2018-01-11 2021-08-27 维沃移动通信有限公司 Communication method and related equipment
CN110536488B (en) * 2018-05-24 2021-08-20 华为技术有限公司 Method and device for transmitting and receiving data during RRC reconfiguration
CN111585692B (en) * 2019-02-15 2021-10-26 华为技术有限公司 Initial signal detection method and device
WO2021027426A1 (en) * 2019-08-15 2021-02-18 大唐移动通信设备有限公司 Method and apparatus for detecting physical downlink control channel (pdcch), and terminal
CN112398578B (en) * 2019-08-15 2022-04-26 大唐移动通信设备有限公司 Method and device for detecting Physical Downlink Control Channel (PDCCH) and terminal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101772179A (en) * 2010-01-08 2010-07-07 中兴通讯股份有限公司 Method and system for transmitting system information in carrier aggregation scene

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101605375B (en) * 2008-06-11 2011-02-09 大唐移动通信设备有限公司 Method for sending signalings on downlink control channel
US20100091678A1 (en) * 2008-10-09 2010-04-15 Texas Instruments Incorporated Downlink rank indication and uplink rank reporting for dedicated beamforming
CN101730139B (en) * 2008-11-03 2013-10-16 夏普株式会社 Descending control channel assignment and blind test method
CN101478808B (en) * 2009-01-21 2014-03-19 中兴通讯股份有限公司 Downlink control information sending and detecting method
CN102036297B (en) * 2010-12-24 2013-08-14 大唐移动通信设备有限公司 Method and equipment for transmitting PDCCH, method and equipment for detecting PDCCH, and system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101772179A (en) * 2010-01-08 2010-07-07 中兴通讯股份有限公司 Method and system for transmitting system information in carrier aggregation scene

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Alcatel-Lucent, Alcatel-Lucent Shanghai Bell.Design Considerations for Extension Carriers and Carrier Segments.《3GPP TSG-RAN WG1 #59bis R1-100408》.2010, *

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