CN108183782B - Signal transmission method, base station and user equipment in asymmetric carrier aggregation - Google Patents
Signal transmission method, base station and user equipment in asymmetric carrier aggregation Download PDFInfo
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- CN108183782B CN108183782B CN201711214529.3A CN201711214529A CN108183782B CN 108183782 B CN108183782 B CN 108183782B CN 201711214529 A CN201711214529 A CN 201711214529A CN 108183782 B CN108183782 B CN 108183782B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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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
Abstract
A signal transmission method in asymmetric carrier aggregation comprises the following steps: the base station sends DCI to user equipment, the DCI comprises a carrier identifier of a first component carrier, a CSI indicator of the first component carrier and a physical uplink shared control channel (PUSCH) indicator of a second component carrier, then sends a CSI reference signal to the user equipment on the first component carrier, and after the user equipment measures the CSI reference signal according to the carrier identifier of the first component carrier and the CSI indicator of the first component carrier, the base station receives a channel measurement result sent by the user equipment on the second component carrier and receives uplink data sent by the user equipment according to the PUSCH indicator on the second component carrier. According to the method, the utilization rate of the air interface resources can be improved through DCI multiplexing. The application also discloses a base station and user equipment capable of realizing the method.
Description
Technical Field
The present application relates to the field of wireless communications, and in particular, to a signal transmission method, a base station, and a user equipment in asymmetric carrier aggregation.
Background
Asymmetric carrier aggregation refers to a carrier aggregation technology in which uplink carriers and downlink carriers have unequal bandwidths. In the asymmetric carrier aggregation technique, the number of downlink component carriers is usually greater than the number of uplink component carriers, so as to be suitable for an application scenario in which the downlink service requirement is greater than the uplink service requirement. In the asymmetric carrier aggregation scenario, some component carriers have uplink and downlink transmission capabilities, and other component carriers only have downlink transmission capabilities and do not have uplink transmission capabilities. For convenience of description, component carriers with uplink and downlink transmission capabilities are hereinafter referred to as uplink and downlink component carriers, and component carriers with only downlink transmission capabilities are referred to as downlink component carriers.
Since the uplink Information cannot be directly sent to the base station through the downlink component carrier, cross-carrier scheduling is required, and the uplink Information, such as Channel State Information (CSI), can be sent to the receiving end through the uplink and downlink component carrier associated with the downlink component carrier. In the existing cross-carrier scheduling, the channel state measurement process of the downlink component carrier is roughly as follows: the base station sends Downlink Control Information (DCI) to the user equipment, the user equipment analyzes the DCI, after the base station sends a channel State measurement Reference Signal (CSI-RS) on a Downlink component carrier, the user equipment performs channel State measurement on the CSI-RS, and reports a Signal measurement result to the base station on the uplink component carrier and the Downlink component carrier.
In practical application, a situation that a downlink component carrier needs to schedule CSI, and an uplink component carrier does not need to schedule CSI often occurs, and at this time, a base station needs to send two pieces of DCI to user equipment to instruct the user equipment to use the uplink component carrier and the downlink component carrier to upload CSI of the downlink component carrier. Referring to fig. 1, taking DCI0 and DCI1 as examples, DCI0 is used to instruct a user equipment to measure CSI of downlink component carriers, and DCI1 is used to instruct the user equipment to schedule uplink and downlink component carriers. Since the downlink component carrier does not have Uplink transmission capability, the PUSCH (Physical Uplink Shared Control Channel) indication information in the DCI0 is null. The uplink and downlink component carriers do not need to perform CSI measurement, so the CSI indication in DCI1 is null. Thus, both DCI includes fields with empty contents, but needs to be transmitted through a Physical Downlink Control Channel (PDCCH), which causes waste of air interface resources.
Disclosure of Invention
In view of this, the present application provides a signal transmission method, a base station, and a user equipment in asymmetric carrier aggregation, which can improve the utilization rate of air interface resources through DCI signaling multiplexing.
A first aspect provides a method for transmitting a signal in asymmetric carrier aggregation, including: the base station sends DCI to user equipment, the DCI comprises a carrier identifier of a first component carrier, a CSI indicator of the first component carrier and a physical uplink shared control channel (PUSCH) indicator of a second component carrier, then sends a CSI reference signal to the user equipment on the first component carrier, and after the user equipment measures the CSI reference signal according to the carrier identifier of the first component carrier and the CSI indicator of the first component carrier, the base station receives a channel measurement result sent by the user equipment on the second component carrier and receives uplink data sent by the user equipment according to the PUSCH indicator on the second component carrier. Wherein the first component carrier and the second component carrier are associated and the first component carrier is not used for uplink transmission. Thus, the user equipment can be instructed to transmit the channel state information of the first component carrier through one DCI, and the user equipment can also be instructed to transmit uplink data on the second component carrier. Compared with the prior art, the air interface resource can be saved through DCI multiplexing, and the utilization rate of the air interface resource is improved.
In one possible implementation, the base station transmits the DCI to the user equipment on the second component carrier. Thus, a method of transmitting DCI is provided.
In another possible implementation, the base station transmits the DCI to the user equipment on the first component carrier. This provides another method of transmitting DCI.
In the above implementation manner, the uplink data is the initial transmission data or the retransmission data.
A second aspect provides a method for transmitting signals in asymmetric carrier aggregation, including: the method comprises the steps that user equipment receives Downlink Control Information (DCI) sent by a base station, wherein the DCI comprises a carrier identifier of a first component carrier, a Channel State Information (CSI) indication of the first component carrier and a physical uplink shared control channel (PUSCH) indication of a second component carrier, the first component carrier is associated with the second component carrier, and the first component carrier is not used for uplink transmission; the user equipment receives a CSI reference signal sent by a base station on a first component carrier; the user equipment determines a first component carrier according to the carrier identifier of the first component carrier, and determines a second component carrier according to the incidence relation between the first component carrier and the second component carrier; the user equipment measures the CSI reference signal according to the CSI indication of the first component carrier to obtain a channel measurement result, and sends the channel measurement result to the base station on the second component carrier; and the user equipment transmits uplink data to the base station on the second component carrier according to the PUSCH indication. In this way, the ue may send the channel state information of the first component carrier according to one DCI, and may also send uplink data on the second component carrier. Compared with the prior art, the air interface resource can be saved through DCI multiplexing, and the utilization rate of the air interface resource is improved.
In one possible implementation, the user equipment receives DCI transmitted by the base station on the second component carrier.
In another possible implementation, the user equipment receives DCI transmitted by the base station on a first component carrier.
A third aspect provides a base station having the functionality of the base station of the first aspect. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions, and the modules may be software and/or hardware.
A fourth aspect provides a user equipment capable of implementing the functionality of the user equipment of the second aspect. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions, and the modules may be software and/or hardware.
Another aspect of the present application provides a computer-readable storage medium having stored therein instructions, which when executed on a computer, cause the computer to perform the method of the above-described aspects.
Another aspect of the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above-described aspects.
From the above, it can be seen that the present application has the following advantages: the base station sends DCI to user equipment, the DCI comprises a carrier identifier of a first component carrier, a CSI indicator of the first component carrier and a physical uplink shared control channel (PUSCH) indicator of a second component carrier, then sends a CSI reference signal to the user equipment on the first component carrier, and after the user equipment measures the CSI reference signal according to the carrier identifier of the first component carrier and the CSI indicator of the first component carrier, the base station receives a channel measurement result sent by the user equipment on the second component carrier and receives uplink data sent by the user equipment according to the PUSCH indicator on the second component carrier. Thus, the user equipment can be instructed to transmit the channel state information of the first component carrier through one DCI, and the user equipment can also be instructed to transmit uplink data on the second component carrier. Compared with the prior art, the air interface resource can be saved through DCI multiplexing, and the utilization rate of the air interface resource is improved.
Drawings
Fig. 1 is a schematic diagram of DCI in a conventional signal transmission method;
FIG. 2 is a diagram illustrating a signal transmission method according to an embodiment of the present application;
fig. 3 is a schematic diagram of a signal transmission method in asymmetric carrier aggregation according to an embodiment of the present application;
fig. 4 is a schematic diagram of downlink control information in an embodiment of the present application;
fig. 5 is another schematic diagram of a signal transmission method in asymmetric carrier aggregation in the embodiment of the present application;
FIG. 6 is a schematic diagram of a base station according to an embodiment of the present application;
fig. 7 is a schematic diagram of a user equipment in an embodiment of the present application;
fig. 8 is another schematic diagram of the base station in the embodiment of the present application;
fig. 9 is another schematic diagram of the user equipment in the embodiment of the present application.
Detailed Description
Fig. 2 is a schematic diagram of a signal transmission method in an embodiment of the present application. The communication system to which the signal transmission method is applied includes a base station and a user equipment. Base stations of the present application include, but are not limited to: a Base Station (Node B), an evolved Node B (eNB), a Home Node B (HNB)/(Home eNode B, HeNB), a Radio Network Controller (RNC), a Base Station Controller (BSC), and a Base Transceiver Station (BTS).
User equipment in the present application may refer to a device that provides voice and/or data connectivity to a user, a handheld device with wireless connection capability, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a Terminal Device, a User Agent (User Agent), a User Device (User Device), or a User Equipment (UE).
The signal transmission method in asymmetric carrier aggregation provided by the application can be applied to the following scenes: the first component carrier has CSI scheduling requirements and the second component carrier has no CSI scheduling requirements.
The method specifically comprises the following steps:
1. the first component carrier has CSI scheduling requirements and the second component carrier does not send uplink data.
2. The first component carrier has CSI scheduling requirements and the second component carrier has requirements for transmitting uplink data.
The uplink data is retransmission data or initial transmission data.
The signal transmission method shown in fig. 2 is roughly as follows:
1. the base station transmits the DCI to the user equipment. The user equipment analyzes the DCI to obtain information such as carrier identification, CSI indication, PUSCH indication and the like.
The DCI includes uplink and downlink resource allocation, power control, and the like, and is carried on a PDCCH channel. The DCI related to cross-carrier scheduling CSI mainly includes carrier indication, CSI-related indication, PUSCH-related indication, and the like.
2. The base station is transmitting the CSI-RS.
3. And the user equipment determines a carrier to be measured according to the carrier identifier in the DCI, measures the CSI-RS according to the CSI indication and sends a channel measurement result to the base station.
Referring to fig. 3, an embodiment of a method for transmitting signals in asymmetric carrier aggregation according to the present application includes:
step 301, the base station sends the DCI to the user equipment.
In this embodiment, a first component carrier and a second component carrier are cell carrier resources, the first component carrier is only used for downlink transmission and is not used for uplink transmission, the second component carrier is used for uplink transmission and downlink transmission, and the first component carrier and the second component carrier are associated with each other.
The base station may send the downlink control information DCI to the user equipment through the first component carrier or the second component carrier. Specifically, when the first component carrier is PDCCH capable, the base station may transmit DCI on the first component carrier. Alternatively, the base station transmits DCI on the second component carrier when the first component carrier is not PDCCH-capable.
It should be noted that the association relationship between component carriers may also be one-to-many. For example, a plurality of component carriers without uplink transmission capability may be associated with one component carrier with uplink and downlink capability.
Step 302, the user equipment parses the carrier identifier of the first component carrier, the CSI indication of the first component carrier, and the PUSCH indication of the second component carrier from the DCI.
Wherein one DCI includes a carrier identity of a first component carrier, a CSI indication of the first component carrier, and a PUSCH indication of a second component carrier, as shown in fig. 4.
Carrier identification of the first component carrier: for the user equipment to determine the first component carrier.
CSI indication of the first component carrier: for instructing the user equipment to measure the CSI-RS on the first component carrier.
PUSCH indication of the second component carrier: and the uplink data is sent to the user equipment on the second component carrier.
It should be noted that, since the user equipment cannot perform uplink transmission by using the first component carrier, when the content of the PUSCH indication is not empty, the user equipment may determine that the component carrier corresponding to the PUSCH indication is not the first component carrier, but an uplink component carrier and an downlink component carrier (i.e., a second component carrier) associated with the first component carrier.
Step 303, the base station sends the CSI reference signal to the ue on the first component carrier.
Step 304, the user equipment measures the CSI reference signal according to the carrier identification of the first component and the CSI indication of the first component carrier.
Specifically, the user equipment determines a first component carrier according to a carrier identifier of the first component carrier, and determines a second component carrier according to an association relationship between the first component carrier and the second component carrier; then, the CSI reference signal is measured according to the CSI indicator of the first component carrier, and step 305 is executed after the channel measurement result is obtained.
Step 305, the user equipment sends the channel measurement result to the base station on the second component carrier.
And step 306, the user equipment sends the uplink data to the base station on the second component carrier according to the PUSCH indication.
When the user equipment detects that the PUSCH indication is non-empty, since the first component carrier does not have uplink transmission capability, it may be determined that uplink data corresponding to the PUSCH indication is uplink data to be sent on the second component carrier, and the user equipment sends the uplink data to the base station on the second component carrier according to the PUSCH indication. Step 305 and step 306 may now be performed together. The uplink data refers to retransmission data or initial transmission data.
It should be noted that, when the user equipment detects that the PUSCH indication is null, it indicates that there is no uplink data transmission on the second component carrier. The user equipment may not transmit uplink data on the second component carrier according to the PUSCH indication.
In this embodiment, one DCI may instruct the ue to send the channel state information of the first component carrier, and may also instruct the ue to send uplink data on the second component carrier. Compared with the prior art, the air interface resource can be saved through DCI multiplexing, and the utilization rate of the air interface resource is improved.
For convenience of understanding, the following describes in detail a signal transmission method in asymmetric carrier aggregation provided in the present application with a specific application scenario:
referring to fig. 5, the aggregated carrier includes 4 component carriers, and carrier identities are CC0, CC1, CC2, and CC3, respectively. Where CC0 and CC1 are uplink and downlink component carriers. CC2 and CC3 are downlink component carriers and have no uplink transmission capability. At carrier aggregation initialization, the user equipment associates CC0 with CC2 and CC1 with CC 3. Thus, the channel measurement information of CC2 may be transmitted on CC0, and the channel measurement information of CC3 may be transmitted on CC 1.
The base station sends DCI on the CC0, and the user equipment analyzes the DCI to obtain the CC2, the CSI indication and the PUSCH indication.
The base station sends CSI-RS to the user equipment on the CC2, the user equipment measures the CC2 according to the CSI indication, and sends the measured channel measurement result (namely CSI) to the user equipment on the CC 0.
Since the CC2 has no uplink transmission capability, it can be determined that the content corresponding to the PUSCH indication is uplink Data to be transmitted on the CC0, and the user equipment transmits the uplink Data (i.e., Data) to the base station according to the PUSCH indication.
The foregoing describes a signal transmission method in asymmetric carrier aggregation according to the present application, and a communication device according to the present application is described below. Referring to fig. 6, the present application provides a base station having a method for implementing the foregoing embodiments of signal transmission in asymmetric carrier aggregation, where an embodiment of the base station 600 includes:
a sending module 601, configured to send downlink control information DCI to a user equipment, where the DCI includes a carrier identifier of a first component carrier, a CSI indicator of the first component carrier, and a PUSCH indicator of a physical uplink shared control channel of a second component carrier, the first component carrier is associated with the second component carrier, and the first component carrier is not used for uplink transmission;
a sending module 601, configured to send a CSI reference signal to a ue on a first component carrier;
a receiving module 602, configured to receive, on the second component carrier, a channel measurement result sent by the ue, where the channel measurement result is obtained by measuring, by the ue, a CSI reference signal according to the carrier identifier of the first component and the CSI indicator of the first component carrier;
the receiving module 602 is further configured to receive, on the second component carrier, uplink data sent by the user equipment according to the PUSCH instruction.
In an optional embodiment, the sending module 601 is specifically configured to send DCI to the user equipment on the second component carrier.
In another optional embodiment, the sending module 601 is specifically configured to send DCI to the user equipment on the first component carrier.
In the above embodiments, the uplink data is the initial transmission data or the retransmission data.
Referring to fig. 7, the present application provides a user equipment having a method for implementing signal transmission in asymmetric carrier aggregation in the above embodiments, where an embodiment of the user equipment 700 includes:
a receiving module 701, configured to receive DCI sent by a base station;
a processing module 702, configured to parse the DCI to obtain a carrier identifier of a first component carrier, a CSI indicator of the first component carrier, and a PUSCH indicator of a physical uplink shared control channel of a second component carrier, where the first component carrier is associated with the second component carrier and the first component carrier is not used for uplink transmission;
a receiving module 701, further configured to receive a CSI reference signal sent by a base station on a first component carrier;
the processing module 702 is further configured to determine a first component carrier according to the carrier identifier of the first component carrier, and determine a second component carrier according to the association relationship between the first component carrier and the second component carrier;
a processing module 702, further configured to measure a CSI reference signal according to a CSI indication of a first component carrier to obtain a channel measurement result;
a sending module 703, configured to send the channel measurement result to the base station on the second component carrier;
the sending module 703 is further configured to send uplink data to the base station according to the PUSCH instruction on the second component carrier.
In an optional embodiment, the receiving module 701 is specifically configured to receive DCI transmitted by the base station on the second component carrier.
In another optional embodiment, the receiving module 701 is specifically configured to receive DCI transmitted by a base station on a first component carrier.
In the above embodiments, the uplink data is the initial transmission data or the retransmission data.
Referring to fig. 8, one embodiment of a base station 800 provided herein includes:
a transceiver 801, a processor 802 and a memory 803 connected to each other by a bus 804;
the processor 802 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
The memory 803 is used to store programs and instructions. In particular, the program may include program code comprising computer operating instructions. The Memory may include a Random-Access Memory (RAM) Memory, and may also include a Non-Volatile Memory (Non-Volatile Memory), such as at least one disk Memory.
The processor 802 is configured to execute the instructions in the memory 803 to enable the base station 800 to perform the method for signal transmission in asymmetric carrier aggregation as in the above embodiments.
Referring to fig. 9, the present application provides one embodiment of a user equipment 900 comprising:
a transceiver 901, a processor 902 and a memory 903 connected to each other by a bus 904;
the processor 902 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
The memory 903 is used to store programs and instructions. In particular, the program may include program code comprising computer operating instructions. The Memory may include a Random-Access Memory (RAM) Memory, and may also include a Non-Volatile Memory (Non-Volatile Memory), such as at least one disk Memory.
The processor 902 is configured to execute the instructions in the memory 903 to enable the user equipment 900 to perform the signal transmission method in asymmetric carrier aggregation as in the above embodiments.
The present application also provides a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to perform the method of the above aspects.
The present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the above aspects.
In the above implementations, all or part may be implemented by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
As described above, the signal transmission method, the base station and the user equipment in asymmetric carrier aggregation provided in the present application are described in detail, and for those skilled in the art, according to the idea of the embodiment of the present application, there may be variations in the specific implementation and application scope, and therefore, the content of this specification should not be construed as limiting the present application.
Claims (12)
1. A method for transmitting signals in asymmetric carrier aggregation, comprising:
a base station sends Downlink Control Information (DCI) to user equipment, wherein the DCI comprises a carrier identifier of a first component carrier, a Channel State Information (CSI) indication of the first component carrier and a physical uplink shared control channel (PUSCH) indication of a second component carrier, the first component carrier is associated with the second component carrier, and the first component carrier is not used for uplink transmission;
the base station sends CSI reference signals to the user equipment on the first component carrier;
the base station receives a channel measurement result sent by the user equipment on the second component carrier, wherein the channel measurement result is obtained by measuring the CSI reference signal by the user equipment according to the carrier identifier of the first component carrier and the CSI indication of the first component carrier;
and the base station receives uplink data sent by the user equipment according to the PUSCH indication on the second component carrier.
2. The method of claim 1, wherein the base station transmitting the DCI to the user equipment comprises:
the base station sends the DCI to the user equipment on the second component carrier;
alternatively, the first and second electrodes may be,
and the base station sends the DCI to the user equipment on the first component carrier.
3. The method according to claim 1 or 2, wherein the uplink data is initial transmission data or retransmission data.
4. A method for transmitting signals in asymmetric carrier aggregation, comprising:
the user equipment receives downlink control information DCI sent by a base station;
the user equipment analyzes a carrier identifier of a first component carrier, a Channel State Information (CSI) indication of the first component carrier and a physical uplink shared control channel (PUSCH) indication of a second component carrier from the DCI, wherein the first component carrier is associated with the second component carrier and the first component carrier is not used for uplink transmission;
the user equipment receives a CSI reference signal sent by the base station on the first component carrier;
the user equipment determines a first component carrier according to the carrier identifier of the first component carrier, and determines a second component carrier according to the incidence relation between the first component carrier and the second component carrier;
the user equipment measures the CSI reference signal according to the CSI indication of the first component carrier to obtain a channel measurement result, and sends the channel measurement result to the base station on the second component carrier;
and the user equipment transmits uplink data to the base station according to the PUSCH indication on the second component carrier.
5. The method of claim 4, wherein the receiving, by the UE, the DCI transmitted by the base station comprises:
the user equipment receives DCI sent by a base station on the second component carrier;
alternatively, the first and second electrodes may be,
and the user equipment receives DCI sent by a base station on the first component carrier.
6. A base station, comprising:
a sending module, configured to send downlink control information DCI to a user equipment, where the DCI includes a carrier identifier of a first component carrier, a CSI indicator of the first component carrier, and a PUSCH indicator of a second component carrier, and the first component carrier is associated with the second component carrier and is not used for uplink transmission;
the sending module is further configured to send a CSI reference signal to the ue on the first component carrier;
a receiving module, configured to receive, on the second component carrier, a channel measurement result sent by the ue, where the channel measurement result is obtained by measuring, by the ue, the CSI reference signal according to the carrier identifier of the first component carrier and the CSI indication of the first component carrier;
the receiving module is further configured to receive, on the second component carrier, uplink data sent by the user equipment according to the PUSCH instruction.
7. The base station of claim 6,
the sending module is specifically configured to send the DCI to the user equipment on the second component carrier; or, specifically, to send the DCI to the user equipment on the first component carrier.
8. The base station of claim 6 or 7, wherein the uplink data is initial transmission data or retransmission data.
9. A user device, comprising:
a receiving module, configured to receive downlink control information DCI sent by a base station;
a processing module, configured to parse out, from the DCI, a carrier identifier of a first component carrier, a CSI indicator of the first component carrier, and a PUSCH indicator of a physical uplink shared control channel of a second component carrier, where the first component carrier is associated with the second component carrier and the first component carrier is not used for uplink transmission;
the receiving module is further configured to receive a CSI reference signal sent by the base station on the first component carrier;
the processing module is further configured to determine a first component carrier according to the carrier identifier of the first component carrier, and determine a second component carrier according to the association relationship between the first component carrier and the second component carrier;
the processing module is further configured to measure the CSI reference signal according to the CSI indication of the first component carrier to obtain a channel measurement result;
a sending module, configured to send the channel measurement result to the base station on the second component carrier;
the sending module is further configured to send uplink data to the base station according to the PUSCH instruction on the second component carrier.
10. The user equipment of claim 9,
the receiving module is specifically configured to receive DCI sent by a base station on the second component carrier; or, specifically, the method is used for receiving DCI transmitted by a base station on the first component carrier.
11. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 3.
12. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 4 to 5.
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| CN201711214529.3A CN108183782B (en) | 2017-11-28 | 2017-11-28 | Signal transmission method, base station and user equipment in asymmetric carrier aggregation |
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| CN201711214529.3A CN108183782B (en) | 2017-11-28 | 2017-11-28 | Signal transmission method, base station and user equipment in asymmetric carrier aggregation |
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|---|---|---|---|---|
| CN111417128B (en) * | 2019-01-07 | 2023-03-31 | 中国移动通信有限公司研究院 | Carrier management method, base station and terminal |
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