CN109391396B - Method, device and computer readable storage medium for multiplexing downlink carrier resources - Google Patents
Method, device and computer readable storage medium for multiplexing downlink carrier resources Download PDFInfo
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/0008—Wavelet-division
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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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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- 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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Abstract
The invention discloses a method and a device for multiplexing downlink carrier resources and a computer readable storage medium, and relates to the technical field of wireless communication. The method comprises the following steps: determining a subframe of an LTE system which does not schedule a data channel but schedules a control channel as a multiplexing subframe; and in the multiplexing subframe, transmitting a downlink signal of the NR system through an OFDM symbol which is not occupied by a control channel of the LTE system. The method and the device can realize the resource multiplexing of the LTE system and the NR system under the condition of not influencing the operation of the LTE system.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for multiplexing downlink carrier resources, and a computer-readable storage medium.
Background
Standardization of 5G NR (New Radio Access Technology) is underway, and a 5G system may be deployed in a high frequency band in the future. In order to more effectively utilize the coverage advantage of low frequencies below 6GHz, when the load of low frequency LTE (Long Term Evolution) still has a margin, the 5G NR is deployed on the existing carrier of LTE to implement carrier-shared operation with LTE, so that the coverage performance of NR can be significantly improved, and the spectrum efficiency of the carrier can be improved.
In the related art, resource multiplexing between LTE and NR is implemented by time domain and/or frequency domain multiplexing. The time-frequency resource multiplexing between LTE and NR can be static, semi-static, or dynamic.
Disclosure of Invention
The inventors of the present invention have found that the following problems exist in the above-described related art: although the related art proposes a technical idea of implementing LTE and NR multiplexing in the time domain and/or the frequency domain, no specific feasible resource multiplexing technical scheme is always given. The present inventors have devised a solution to at least one of the above-mentioned problems.
An object of the present invention is to provide a practical technical solution for multiplexing downlink carrier resources.
According to an embodiment of the present invention, a method for multiplexing downlink carrier resources is provided, including: determining a subframe of an LTE system which does not schedule a data channel but schedules a control channel as a multiplexing subframe; and in the Multiplexing subframe, transmitting a downlink signal of the NR system through an OFDM (Orthogonal Frequency Division Multiplexing) symbol which is not occupied by a control channel of the LTE system.
Optionally, the position of the starting OFDM symbol occupied by the control channel of the NR system is fixed.
Optionally, the NR system supports a time slot with a time domain length of N OFDM symbols, where N is an integer greater than or equal to 2.
Optionally, in a case that the control channel of the LTE system occupies M OFDM symbols, and N is greater than M, the NR system further supports a slot with a time domain length of N-M OFDM symbols, where M is an integer greater than or equal to 2.
Optionally, when the LTE system transmits CRS (Cell Reference Signal) through REs (resource elements) in the multiplexing subframe, the LTE system transmits downlink signals of the NR system by using resources other than the REs in the multiplexing subframe in a puncturing manner.
Optionally, the NR system has a subcarrier spacing of 15 kHz.
According to another embodiment of the present invention, an apparatus for multiplexing downlink carrier resources is provided, including: the multiplexing subframe determining module is used for determining a subframe which does not schedule a data channel but schedules a control channel in the LTE system as a multiplexing subframe; and the downlink signal transmission module is used for transmitting the downlink signal of the NR system through the OFDM symbol which is not occupied by the control channel of the LTE system in the multiplexing subframe.
Optionally, the position of the starting OFDM symbol occupied by the control channel of the NR system is fixed.
Optionally, the NR system supports a time slot with a time domain length of N OFDM symbols, where N is an integer greater than or equal to 2.
Optionally, in a case that the control channel of the LTE system occupies M OFDM symbols, and N is greater than M, the NR system further supports a slot with a time domain length of N-M OFDM symbols, where M is an integer greater than or equal to 2.
Optionally, the downlink signal transmission module transmits, in response to the LTE system transmitting CRS through REs in the multiplexing subframe, a downlink signal of the NR system by using resources other than the REs in the multiplexing subframe in a puncturing manner.
Optionally, the NR system has a subcarrier spacing of 15 kHz.
According to another embodiment of the present invention, an apparatus for multiplexing downlink carrier resources is provided, including: a memory and a processor coupled to the memory, the processor configured to perform the method for downlink carrier resource multiplexing in any of the above embodiments based on instructions stored in the memory device.
According to still another embodiment of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for downlink carrier resource multiplexing in any of the above embodiments.
One advantage of the present invention is that the LTE system only calls the control channel and not the data channel within the multiplexing subframe, and transmits the NR signal using the resources not occupied by the LTE control channel within the multiplexing subframe, thereby realizing resource multiplexing of the LTE system and the NR system without affecting the operation of the LTE system.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
The invention will be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 shows a flowchart of an embodiment of a method for multiplexing downlink carrier resources according to the present invention.
Fig. 2 is a schematic diagram illustrating an embodiment of a method for multiplexing downlink carrier resources according to the present invention.
Figures 3a-3c illustrate a schematic diagram of one embodiment of resource allocation within a multiplexed subframe in accordance with the present invention.
Fig. 4a-4b show schematic diagrams of another embodiment of resource allocation within a multiplexed subframe in accordance with the invention.
Fig. 5a-5c are diagrams illustrating yet another embodiment of resource allocation within a multiplexed subframe in accordance with the invention.
Fig. 6 is a block diagram illustrating an embodiment of an apparatus for multiplexing downlink carrier resources according to the present invention.
Fig. 7 is a block diagram illustrating another embodiment of the apparatus for multiplexing downlink carrier resources according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 shows a flowchart of an embodiment of a method for multiplexing downlink carrier resources according to the present invention.
As shown in fig. 1, in step 110, a subframe in which the LTE system does not schedule a data channel but schedules a control channel is determined as a multiplexed subframe. Since the premise of resource reuse is that the operation of the existing LTE system cannot be affected, in one embodiment, resource reuse in the reuse subframe may be implemented in the manner shown in fig. 2.
As shown in fig. 2, subframes 1, 2, 5, 6, and 9 transmit only downlink data information of the LTE system, and subframes 3, 4, 7, and 8 serve as multiplexing subframes of the LTE system and the NR system.
In one embodiment, within these multiplexing subframes, the LTE system may schedule only the control channel to transmit control information, and not CRS and data information. The LTE system may configure the subframe as an MBSFN (Multicast Broadcast Single Frequency Network) subframe to implement the setting of the multiplexing subframe.
In another embodiment, within these multiplexing subframes, the LTE system may also schedule control channels and transmit CRS, but not transmit downlink data information.
In step 120, the downlink signal of the NR system is transmitted through OFDM symbols not occupied by the control channel of the LTE system within the multiplexing subframe. The NR system can support various subcarrier intervals, and when the subcarrier interval of the NR system is 15kHz, the adjacent frequency coexistence with the LTE system can be better realized.
In order not to affect the operation of the LTE system, for example, the resource multiplexing manner shown in fig. 3a may be adopted in the multiplexing subframe. As shown in fig. 3a, the multiplexing subframe includes 14 symbols (labeled as 0-13), the LTE system only occupies symbols 0 and 1 as its control channel, and the NR system occupies the remaining 12 symbols to transmit downlink data information and control information. That is, the NR system supports a slot having a time length of 12 in this case.
In one embodiment, as shown in fig. 3a, 3b and 3c, in a multiplexing subframe with a length of 14 symbols, the LTE system may occupy 2, 3 or 4 symbols as its control channel, respectively. Correspondingly, the NR system may occupy 12, 11 or 10 symbols to transmit downlink information, i.e., the NR system supports time slots with time lengths of 12, 11 and 10, respectively. By the multiplexing mode, the downlink data information of the NR system can be transmitted under the condition of not influencing the operation of the LTE system.
In the embodiments in fig. 3a, 3b and 3c, the NR system always occupies symbol 4 and symbol 5 as its control channel, regardless of the fact that the control channel of the LTE system occupies several symbols. That is, the first symbol position occupied by the control channel of the NR system is fixed to the 5 th symbol of the multiplexing subframe. The LTE system generally occupies the first 4 symbols of the multiplexing subframe at most as its control channel, and the first symbol position occupied by the control channel of the NR system may also be fixed to the 6 th symbol of the multiplexing subframe. By the technical scheme, the efficiency of the NR system for calling the control channel can be improved.
Fig. 4a is a schematic diagram illustrating another embodiment of the method for multiplexing downlink carrier resources according to the present invention.
As shown in fig. 4a, in a multiplexed subframe, the LTE system transmits CRS with partial REs (dots-filled squares in fig. 4 a) in the multiplexed subframe in addition to scheduling symbols 0-2 as its control channel. In this case, the NR system occupies symbols 3 to 13 as its channels, and transmits downlink data information in these channels by puncturing. For example, the puncturing transmission can be realized by correctly decoding the data channel transport block under the appropriate channel condition through the processing procedures of de-rate matching, channel decoding, and the like at the receiving end. The NR downlink signals can be prevented from being transmitted in the RE for CRS transmission in the LTE system through the punching transmission, so that the resource multiplexing is realized.
In another embodiment, fig. 4b shows the resource allocation case within the multiplexing subframe in case that the NR system supports a mini-slot (micro slot) having a time length of 2 symbols. As shown in fig. 4b, symbols 0-2 are used as control channels of the LTE system, the CRS of the LTE system is transmitted using REs (squares filled by dots in fig. 4 b) in symbols 4, 7, and 11, and symbols 3 and 10 do not transmit any signal. Symbols 5 and 6, symbols 8 and 9, and symbols 12 and 13 are used as 3 mini-slots for transmitting NR downlink data information. By the technical scheme, the LTE and the NR can occupy different resources in the multiplexing subframe to send own control information, data information or CRS.
In yet another embodiment, as shown in fig. 5a, 5b and 5c, the control channel of the LTE system occupies the first 2, 3 and 4 symbols in the multiplexed subframe, respectively, the LTE system does not transmit CRS in the multiplexed subframe, and the NR system supports mini-slot with a time length of 2 symbols. In this case, the NR system transmits downlink data information using symbols not occupied by the control channel of the LTE system, and every two symbols form one slot. As shown in fig. 5b, the control channel of the LTE system occupies three symbols (symbols 0-2), symbol 3 does not transmit any information, and the rest symbols are used for transmitting downlink data information of the NR system.
In the above embodiment, the subframe in which the LTE system does not schedule the data channel is determined as the multiplexing subframe, and different resources are allocated to the LTE system and the NR system in the multiplexing subframe to transmit the downlink control information, the downlink data information, or the CRS. Therefore, under the condition of not influencing the operation of the LTE system, the resource multiplexing of the LTE system and the NR system is realized.
Fig. 6 is a block diagram illustrating an embodiment of an apparatus for multiplexing downlink carrier resources according to the present invention.
As shown in fig. 6, the apparatus includes a multiplex subframe determination module 61 and a downlink signal transmission module 62.
The multiplexed subframe determination module 61 determines a subframe in which the LTE system does not schedule a data channel but schedules a control channel as a multiplexed subframe. For example, the subcarrier spacing for an NR system may be 15 kHz. The position of the starting OFDM symbol occupied by the control channel of the NR system within the multiplexed subframe is fixed, and may be, for example, the 5 th or 6 th OFDM symbol in the multiplexed subframe. The NR system may support a time slot having a time domain length of N OFDM symbols, N being an integer greater than or equal to 2. Under the condition that a control channel of an LTE system occupies M OFDM symbols and N is greater than M, the NR system also supports a time slot with the time domain length of N-M OFDM symbols. For example, M may be equal to 2, 3, or 4.
The downlink signal transmission module 62 transmits the downlink signal of the NR system through the OFDM symbol not occupied by the control channel of the LTE system within the multiplexing subframe.
In one embodiment, in the case that the LTE system transmits CRS through REs in the multiplexing subframe, the downlink signal transmission module 62 transmits the downlink signal of the NR system through puncturing by using resources other than the REs in the multiplexing subframe.
In the above embodiment, the subframe in which the LTE system does not schedule the data channel is determined as the multiplexing subframe, and different resources are allocated to the LTE system and the NR system in the multiplexing subframe to transmit the downlink control information, the downlink data information, or the CRS. Therefore, under the condition of not influencing the operation of the LTE system, the resource multiplexing of the LTE system and the NR system is realized.
Fig. 7 is a block diagram illustrating another embodiment of the apparatus for multiplexing downlink carrier resources according to the present invention.
As shown in fig. 7, the apparatus 70 of this embodiment includes: a memory 71 and a processor 72 coupled to the memory 71, wherein the processor 72 is configured to execute the method for multiplexing downlink carrier resources according to any embodiment of the present invention based on instructions stored in the memory 71.
The memory 71 may include, for example, a system memory, a fixed nonvolatile storage medium, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), a database, and other programs.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
So far, the method, the apparatus and the computer readable storage medium for downlink carrier resource multiplexing according to the present invention have been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The method and system of the present invention may be implemented in a number of ways. For example, the methods and systems of the present invention may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (14)
1. A method for multiplexing downlink carrier resources comprises the following steps:
determining a subframe in which a Long Term Evolution (LTE) system does not schedule a data channel but schedules a control channel as a multiplexing subframe, and in the multiplexing subframe, the LTE system schedules the control channel to transmit control information of the LTE system without transmitting Cell Reference Signal (CRS) and data information of the LTE system or transmits CRS of the LTE system without transmitting data information of the LTE system;
and in the multiplexing subframe, transmitting a downlink signal of a new radio access technology (NR) system through an Orthogonal Frequency Division Multiplexing (OFDM) symbol which is not occupied by a control channel of the LTE system.
2. The method of claim 1, wherein the transmitting the downlink signal of the NR system comprises:
the position of the starting OFDM symbol occupied by the control channel of the NR system is fixed.
3. The method of claim 1, wherein,
the NR system supports time slots with a time domain length of N OFDM symbols, N being an integer greater than or equal to 2.
4. The method of claim 3, wherein,
when the control channel of the LTE system occupies M OFDM symbols and N is greater than M, the NR system further supports a slot having a time domain length of N-M OFDM symbols, where M is an integer greater than or equal to 2.
5. The method of claim 1, wherein,
and under the condition that the LTE system transmits a cell reference signal CRS through resource elements RE in the multiplexing subframe, transmitting a downlink signal of the NR system by utilizing resources except the RE in the multiplexing subframe in a puncturing mode.
6. The method of any of claims 1-5, wherein the NR system has a subcarrier spacing of 15 kHz.
7. An apparatus for multiplexing downlink carrier resources, comprising:
a multiplexing subframe determining module, configured to determine a subframe in which a long term evolution LTE system does not schedule a data channel but schedules a control channel as a multiplexing subframe, and in the multiplexing subframe, the LTE system schedules the control channel to transmit control information of the LTE system without transmitting a cell reference signal CRS and data information of the LTE system, or transmits a CRS of the LTE system without transmitting data information of the LTE system;
and the downlink signal transmission module is used for transmitting a downlink signal of the new radio access technology NR system through an orthogonal frequency division multiplexing OFDM symbol which is not occupied by the control channel of the LTE system in the multiplexing subframe.
8. The apparatus of claim 7, wherein a position of a starting OFDM symbol occupied by a control channel of the NR system is fixed.
9. The apparatus of claim 7, wherein the NR system supports a slot of time domain length N OFDM symbols, N being an integer greater than or equal to 2.
10. The apparatus of claim 9, wherein the NR system further supports a slot of time domain length N-M OFDM symbols, where a control channel of the LTE system occupies M OFDM symbols and N is greater than M, M being an integer greater than or equal to 2.
11. The apparatus of claim 7, wherein the downlink signal transmitting module transmits the downlink signal of the NR system by puncturing resources other than the REs in the multiplexed subframe when the LTE system transmits the cell reference signal CRS through resource elements REs in the multiplexed subframe.
12. The apparatus of any of claims 7-11, wherein the NR system has a subcarrier spacing of 15 kHz.
13. An apparatus for multiplexing downlink carrier resources, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of downlink carrier resource multiplexing according to any of claims 1-6 based on instructions stored in the memory device.
14. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method for downlink carrier resource multiplexing according to any one of claims 1 to 6.
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| US11177919B2 (en) * | 2013-01-18 | 2021-11-16 | Texas Instruments Incorporated | Methods for energy-efficient unicast and multicast transmission in a wireless communication system |
| US10637619B2 (en) * | 2014-11-03 | 2020-04-28 | Samsung Electronics Co., Ltd. | Method and apparatus for channel access for LTE on unlicensed spectrum |
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| CN101287281A (en) * | 2007-04-11 | 2008-10-15 | 北京三星通信技术研究有限公司 | Transmission apparatus and method for scheduling control signaling of downlink in wireless communication system |
| CN101039169A (en) * | 2007-05-21 | 2007-09-19 | 中兴通讯股份有限公司 | Channel multiplexing method and apparatus in third-generation mobile communication long-term evolution system |
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