CN111164902B - Method, apparatus and computer readable medium for downlink transmission modulation - Google Patents
Method, apparatus and computer readable medium for downlink transmission modulation Download PDFInfo
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- CN111164902B CN111164902B CN201780095450.5A CN201780095450A CN111164902B CN 111164902 B CN111164902 B CN 111164902B CN 201780095450 A CN201780095450 A CN 201780095450A CN 111164902 B CN111164902 B CN 111164902B
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- 238000004891 communication Methods 0.000 claims description 29
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
Abstract
Embodiments of the present disclosure provide methods and apparatus for downlink transmission modulation. According to embodiments of the present disclosure, a terminal device may determine a modulation scheme related to a physical layer based on higher layer signaling and physical layer signaling. According to embodiments of the present disclosure, a network device may configure a modulation scheme to a terminal device in a flexible manner.
Description
Technical Field
Embodiments of the present disclosure relate generally to communication technology and, more particularly, relate to methods, apparatuses, and computer-readable media for modulating downlink transmissions.
Background
In recent years, technology of the machine communication type has been further developed. In the third generation partnership project (3 GPP) Radio Access Network (RAN) #75 conference, a new work item "eMTC (Even Further Enhanced eMTC for LTE), which is a further improvement for LTE", has been approved for improving the spectral efficiency of the Physical Downlink Shared Channel (PDSCH). One possible approach is to specify optional support for 64 Quadrature Amplitude Modulation (QAM) for unicast PDSCH.
Disclosure of Invention
Embodiments of the present disclosure relate generally to methods for modulating downlink transmissions and corresponding network devices and terminal devices.
In a first aspect, embodiments of the present disclosure provide a method implemented at a terminal device for communication. The method comprises the following steps: obtaining first configuration information related to modulation of a physical channel from a network device and via a higher layer first signaling; obtaining second configuration information related to modulation from the network device and via second signaling of the physical layer; and determining a modulation scheme associated with the physical channel based on the first configuration information and the second configuration information.
In some embodiments, a method comprises: in response to the first configuration information indicating that the number of subframes of the Channel State Information (CSI) reference resource is a predetermined number, the modulation scheme is determined to be a modulation scheme having an order exceeding a predetermined value.
In some embodiments, a method comprises: in response to the first configuration information indicating that the number of subframes of a Channel State Information (CSI) reference resource exceeds a predetermined number and the second configuration information indicating that transmission of a physical channel is not repeated, the modulation scheme is determined to be a modulation scheme having an order exceeding the predetermined value.
In some embodiments, a method comprises: in response to the number of subframes in the first configuration information indicating Channel State Information (CSI) reference resources exceeding a predetermined number, and the second configuration information indicating transmission repetition of the physical channel, the modulation scheme is determined to be a modulation scheme having an order of a predetermined value or lower.
In some embodiments, a method comprises: the first configuration information is obtained via Radio Resource Control (RRC) signaling. In some embodiments, the physical channel is a Physical Downlink Shared Channel (PDSCH).
In a second aspect, embodiments of the present disclosure provide a method implemented at a network device for communication. The method comprises the following steps: determining first configuration information related to modulation of a physical channel based on channel conditions between the network device and the terminal device; determining second configuration information related to modulation based on at least one of channel conditions and a response from the terminal device; transmitting first configuration information to the terminal device via a first signaling of a higher layer; and transmitting second configuration information to the terminal device and via second signaling of the physical layer.
In some embodiments, a method comprises: in response to the channel quality exceeding a predetermined threshold and the change in channel condition during a given time being below the predetermined threshold, determining first configuration information to indicate that a number of subframes of a Channel State Information (CSI) reference resource is a predetermined number.
In some embodiments, a method comprises: in response to a number of Negative Acknowledgements (NACKs) received from the terminal device exceeding a predetermined threshold, second configuration information is determined to indicate that the physical channel has transmission repetition.
In some embodiments, a method comprises: the first configuration information is sent to the terminal device via Radio Resource Control (RRC) signaling. In some embodiments, the physical channel is a Physical Downlink Shared Channel (PDSCH).
In a third aspect, embodiments of the present disclosure provide a terminal device. The terminal device comprises: at least one processor; and a memory coupled to the at least one processor, the memory storing instructions therein that, when executed by the at least one processor, cause the terminal device to perform actions comprising: obtaining first configuration information related to modulation of a physical channel from a network device and via a higher layer first signaling; obtaining second configuration information related to modulation from the network device and via second signaling of the physical layer; and determining a modulation scheme associated with the physical channel based on the first configuration information and the second configuration information.
In a fourth aspect, embodiments of the present disclosure provide a network device. The network device includes: at least one processor; and a memory coupled to the at least one processor, the memory storing instructions therein that, when executed by the at least one processor, cause the network device to perform actions comprising: determining first configuration information related to modulation of a physical channel based on channel conditions between the network device and the terminal device; determining second configuration information related to modulation based on at least one of channel conditions and a response from the terminal device; transmitting first configuration information to the terminal device via a first signaling of a higher layer; and transmitting second configuration information to the terminal device via second signaling of the physical layer.
In a fifth aspect, embodiments of the present disclosure provide a computer-readable medium. The computer-readable medium has stored thereon instructions that, when executed by at least one processing unit of a machine, cause the machine to implement: obtaining first configuration information related to modulation of a physical channel from a network device and via a higher layer first signaling; obtaining second configuration information related to modulation from the network device and via second signaling of the physical layer; and determining a modulation scheme associated with the physical channel based on the first configuration information and the second configuration information.
In a sixth aspect, embodiments of the present disclosure provide another computer-readable medium. Another computer-readable medium has stored thereon instructions that, when executed by at least one processing unit of a machine, cause the machine to: determining first configuration information related to modulation of a physical channel based on channel conditions between the network device and the terminal device; determining second configuration information related to modulation based on at least one of channel conditions and a response from the terminal device; transmitting first configuration information to the terminal device via a first signaling of a higher layer; and transmitting second configuration information to the terminal device via the second signaling of the physical layer.
Other features and advantages of embodiments of the present disclosure will become apparent from the following description of specific embodiments, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the embodiments of the disclosure.
Drawings
Embodiments of the present disclosure are presented by way of example and their advantages are explained in more detail below with reference to the drawings, in which
Fig. 1 illustrates a schematic diagram of a communication system 100 according to an embodiment of the present disclosure;
fig. 2 illustrates a flow chart of a method implemented at a terminal device for communication according to an embodiment of the disclosure;
fig. 3 illustrates a flowchart of a method implemented at a terminal device according to an example embodiment of the present disclosure;
fig. 4 illustrates a flowchart of a method implemented at a network device for communication according to an embodiment of the present disclosure; and
fig. 5 illustrates a schematic diagram of an apparatus according to an embodiment of the present disclosure.
The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements.
Detailed Description
The subject matter described herein will now be discussed with reference to several example embodiments. It should be understood that these embodiments are discussed only for the purpose of enabling those skilled in the art to better understand and thus achieve the subject matter described herein, and are not meant to imply any limitation on the scope of the subject matter.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two functions or acts illustrated in succession may, in fact, be executed concurrently or the acts may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
As used herein, the term "communication network" refers to a network that conforms to any suitable communication standard (e.g., long Term Evolution (LTE), LTE-advanced (LTE-a), wideband Code Division Multiple Access (WCDMA), high Speed Packet Access (HSPA), new Radio (NR), etc.). Furthermore, the communication between the terminal device and the network device in the communication network may be performed according to any suitable generation communication protocol, including but not limited to first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, future fifth generation (5G) communication protocols, and/or any other protocol currently known or to be developed in the future.
Embodiments of the present disclosure may be applied in various communication systems. In view of the rapid development of communications, there will of course also be future types of communication technologies and systems that may embody the present disclosure. The scope of the present disclosure should not be limited to only the above-described systems.
The term "network device" includes, but is not limited to, a Base Station (BS), gateway, management entity, and other suitable devices in a communication system. The term "base station" or "BS" means a node B (NodeB or NB), an evolved NodeB (eNodeB or eNB), a Remote Radio Unit (RRU), a Radio Header (RH), a Remote Radio Header (RRH), a relay, a low power node (e.g., femto, pico), etc.
The term "terminal device" includes, but is not limited to, "User Equipment (UE)" and other suitable end devices capable of communicating with a network device. For example, a "terminal device" may refer to a terminal, mobile Terminal (MT), subscriber Station (SS), portable subscriber station, mobile Station (MS), or Access Terminal (AT).
The term "modulation" as used herein refers to the process of transmitting a message signal within another signal that may be physically transmitted. The term "modulation scheme" as used herein includes, but is not limited to, modulation levels, transport block tables, and modulation and coding schemes. The term "higher layer" as used herein refers to layers above the physical layer.
As described above, one possible approach for improving PDSCH spectral efficiency is to specify alternative support for 64QAM for unicast PDSCH. In the RANs 1#88 protocol, the non-repeated unicast PDSCH in connected mode supports 64QAM. Specifically, unless the network device enables the use of 64QAM via signaling, the terminal device will not use 64QAM. In the RANs 1#89 protocol, a low complexity (BL)/Coverage Enhancement (CE) UE functionality for release 15 bandwidth reduction is introduced to support 64QAM. 64QAM is enabled via a higher version of the configuration of the BL/CE UE version 15. Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) indicates whether PDSCH is not repeated. If the DCI indicates that the PDSCH has no repetition, 64QAM may be supported on the PDSCH.
The current specification indicates in section 73.2.1 of TS 36.213 that if a BL/CE UE is configured in coverage extension mode (CEMode) a, and if the PDSCH is allocated or semi-statically scheduled with DCI format 6-1A by a machine type communication PDCCH (MPDCCH), the UE considers that there is no PDSCH repetition if the higher layer parameter CSI-numrepetition CE-R13 (i.e., R-CSI) indicates one subframe. The term "CSI-numrepetition ce-r13" as used herein refers to the number of subframes used for Channel State Indicator (CSI) reference resources. Based on the discussion of the previous conference, if PDSCH is not repeated, the terminal device is configured with 64QAM. Both DCI and parameter R-CSI may indicate that PDSCH has no repetition. However, it is unclear whether the terminal device supports 64QAM in the following cases: (1) The terminal device is configured to support 64QAM and the DCI indicates PDSCH transmission repetition; and (2) the terminal device is configured to support 64QAM and the parameter R-CSI exceeds 1.
A known conventional solution is to set the parameter R CSI to 1 if the terminal device is configured to support 64QAM. However, if the channel condition between the terminal device and the network device becomes worse and PDSCH repetition is required, RRC reconfiguration is required.
To at least partially address the above and other potential problems, embodiments of the present disclosure provide new solutions for modulation of downlink data transmissions. Some example embodiments of the present disclosure will now be described below with reference to the accompanying drawings. However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these figures is for explanatory purposes as the disclosure extends beyond these limited embodiments.
FIG. 1 illustrates a schematic diagram of an environment in which embodiments of the present disclosure may be implemented. Environment 100, which is part of a communication network, includes a network device 120 and one or more terminal devices 110-1 and 110-2 (collectively, "terminal devices 110"). It should be noted that environment 100 may also include other elements omitted for clarity. Network device 120 may communicate with terminal device 110. It should be understood that the number of network devices and terminal devices shown in fig. 1 is given for illustrative purposes and is not meant to be limiting in any way. Network 100 may include any suitable number of network devices and terminal devices.
Communication in environment 100 may be implemented in accordance with any suitable communication protocol(s), including, but not limited to, first generation (1G), second generation (2G), third generation (3G), fourth generation (4G), fifth generation (5G), etc., cellular communication protocols, wireless local area network communication protocols (e.g., institute of Electrical and Electronics Engineers (IEEE) 802.11, etc.), and/or any other protocols currently known or developed in the future. Moreover, the communication may utilize any suitable wireless communication technology, including, but not limited to: code Division Multiple Access (CDMA), frequency Division Multiple Access (FDMA), time Division Multiple Access (TDMA), frequency Division Duplex (FDD), time Division Duplex (TDD), multiple Input Multiple Output (MIMO), orthogonal Frequency Division Multiple Access (OFDMA), and/or any other technique currently known or developed in the future.
Network device 120 may configure terminal device 110 with a modulation scheme for demodulating physical channel correlations via higher layers. For example, the network device 120 may configure the modulation scheme to the terminal device via Radio Resource Control (RRC) signaling. The modulation scheme may be any suitable modulation scheme. The modulation scheme may include modulation levels supported by terminal device 110 (e.g., 16QAM, 64QAM, etc.). The modulation scheme may also include a table of transport block sizes supported by terminal device 110. The modulation scheme may further include modulation and coding schemes supported by terminal device 110. The modulation scheme may comprise any suitable combination of the above. For example, the modulation scheme may include 64QAM. The modulation scheme may also include Quadrature Phase Shift Keying (QPSK). The network device 120 may transmit configuration information related to the modulation via signaling on the higher layer and physical layer (or higher layer signaling and physical layer signaling).
The terminal device 110 may determine a modulation scheme based on the configuration information to demodulate data transmitted on the physical channel. For example, table 1 below indicates a 64QAM configuration (e.g., a TBS configuration supporting 64QAM modulation) according to an embodiment of the present disclosure.
TABLE 1
| DCI indicates PDSCH repetition | DCI indicates PDSCH is not repeated | |
| R CSI ＝1 | 64QAM | 64QAM |
| R CSI >1 | 16QAM or QPSK | 64QAM |
Fig. 2 illustrates a flow chart of a method 200 according to an example embodiment of the present disclosure. The method 200 may be implemented, for example, at the terminal device 110. In some embodiments, for example, network device 120 may enable a modulation scheme (e.g., 64 QAM) for terminal device 110 via higher layer signaling.
At block 205, terminal device 110 obtains configuration information related to modulation of a physical channel from network device 120 and via higher layer first signaling. For ease of discussion, the configuration information obtained at block 205 is referred to as "first configuration information".
In an example embodiment, the terminal device 110 may obtain the first configuration information via RRC signaling. For example, the first configuration information may include a parameter CSI-numrepetition ce (R) indicating the number of subframes for the CSI reference resource CSI ). The parameter csi-numrepetition ce may be a predetermined number (e.g., one). In other embodiments, the parameter CSI-numrepetition ce may be greater than 1, meaning that subframes for CSI measured on the MPDCCH have been repeated. As described above, if the parameter csi-numrepetition ce is 1, it indicates that there is no PDSCH repetition, which means that the PDSCH can support 64QAM.
At block 210, terminal device 110 obtains modulation-related configuration information from network device 120 via second signaling of the physical layer. In some embodiments, the second configuration information may include DCI. For example, the DCI may indicate a Modulation and Coding Scheme (MCS) and the number of repetitions. It is to be appreciated that other information can be transmitted through DCI (e.g., a hopping flag, a resource block allocation, etc.). For example, the DCI may be DCI Format 6-1A. As described above, the DCI may indicate whether the PDSCH is not repeated. For ease of discussion, the configuration information obtained at block 210 is referred to as "second configuration information".
At block 215, terminal device 110 determines a modulation scheme associated with the physical channel based on the first configuration information and the second configuration information. In some embodiments, the first configuration information may have a higher priority than the second configuration information.
Fig. 3 illustrates an example implementation of block 215 in fig. 2. It should be appreciated that the implementation shown in fig. 3 is merely an example, and those skilled in the art will appreciate that other suitable implementations may be applied at block 215. As shown in fig. 2, the terminal device 110 may obtain the first configuration information and the second configuration information.
In an example embodiment, the first configuration information may include parameters csi-NumRepetitionCE (R CSI ). At block 305, terminal device 110 may determine whether the number of subframes of the CSI reference resource is equal to a predetermined number. In some embodiments, the predetermined number is one.
If the number of subframes of the CSI reference resource is a predetermined number, at block 310, terminal device 110 may determine the modulation scheme as a modulation scheme having an order exceeding a predetermined value. In some embodiments, the predetermined modulation order (Q m ) 4. For example, a modulation scheme having an order exceeding a predetermined value is hereinafter referred to as 64QAM. It should be appreciated that the modulation scheme having an order exceeding a predetermined value may be any modulation scheme having a higher order (e.g., 256 QAM). That is, the terminal device 110 may demodulate the PDSCH based on 64QAM. For example, if the terminal device 110 is configured with 64QAM through higher layer signaling and the number of subframes of the CSI reference resource is equal to 1, it indicates that the PDSCH is not repeated. It should be appreciated that the predetermined number may be any suitable value other than one.
In an embodiment in which the second configuration information is included in DCI, DCI format 6-1A may be explained as follows: a DCI field indicating the number of repetitions is reserved. That is, PDSCH is not repeated. The MCS field in the DCI format 6-1A UE-specific search space is extended to 5 bits by re-interpreting the frequency hopping flag as the Most Significant Bit (MSB). The interpretation of the repetition number field can be reused according to table 2 (shown below), table 2 being table 7.1.7.1-1 in TS 36.213. The TBS may be determined using table 7.1.7.2.1-1 in TS 36.213 (not shown). The maximum TBS in issue 14 is used whenever the TBS value in Table 7.1.7.2.1-1 exceeds the maximum TBS in issue 14. It should be appreciated that table 2 is merely an example, and that any suitable configuration may be used to determine the modulation and TBS index.
Table 2: PDSCH repetition level (DCI Format 6-1A)
If the number of subframes of the CSI reference resource exceeds the predetermined number, at block 315, terminal device 110 may determine whether transmission of the physical channel is not repeated based on the second configuration information. In some embodiments, the second configuration information may include DCI.
If the transmission of the physical channel is not repeated, terminal device 110 may determine the modulation scheme as a modulation scheme having an order exceeding a predetermined value (e.g., 64 QAM) at block 310. For example, if the terminal device 110 is configured with 64QAM and the number of subframes of the CSI reference resource exceeds one through higher layer signaling, PDSCH support repetition is indicated. The terminal device may determine the modulation scheme as 64QAM if the second configuration information indicates that the PDSCH is not repeated.
In an embodiment in which the second configuration information indicates that the PDSCH repetition number is 1, DCI format 6-1A may be explained as follows. The MCS field in the DCI format 6-1A UE-specific search space is extended to 5 bits by re-interpreting the frequency hopping flag as the Most Significant Bit (MSB). The interpretation of the repetition number field can be reused according to table 2 (as shown above), table 2 being table 7.1.7.1-1 in TS 36.213. TBS is determined using table 7.1.7.2.1-1 in TS 36.213 (not shown). The maximum TBS in issue 14 is used whenever the TBS value in Table 7.1.7.2.1-1 exceeds the maximum TBS in issue 14.
If the transmission of the physical channel is repeated, this is according to the indication of the number of repetitions field in the DCI at block 315. At block 320, terminal device 110 may assume the modulation scheme as a modulation scheme having a modulation order of a predetermined value or below. In some embodiments, the predetermined value is four. For example, the modulation scheme with an order below a predetermined value may be 16QAM and/or QPSK. In embodiments where the second configuration information indicates that the PDSCH has repetition, the terminal device 110 may determine that the PDSCH falls back to the release 14 modulation scheme. In an example embodiment, terminal device 110 may determine the modulation scheme as 16QAM. In another embodiment, terminal device 110 may determine the modulation scheme as QPSK.
Fig. 4 illustrates a flow chart of a method 400 according to an example embodiment of the present disclosure. In some embodiments, the method 400 may be implemented at the network device 120.
At block 405, network device 120 determines first configuration information related to modulation of a physical channel based on channel conditions between network device 120 and terminal device 110. In some embodiments, the first configuration information may include parameters csi-NumRepetitionCE (R CSI )。
In some embodiments, if network device 120 determines that the channel condition between network device 120 and terminal device 110 is good enough for 64QAM, network device 120 may send parameters csi-NumRepetitionCE (R CSI ) Is determined as a predetermined number. For example, network device 120 may determine channel conditions based on the channel quality indicator. If the network device 120 determines the parameter csi-NumRepetitionCE (R CSI ) 1, the terminal device 110 may determine that the highest modulation scheme associated with the PDSCH is 64QAM. In some embodiments, if the channel condition between network device 120 and terminal device 110 is not yet good enough for 64QAM, network device 120 may determine a parameter csi-NumRepetitionCE (R CSI ) Greater than 1.
In an example embodiment, if network device 120 determines that the channel condition is stable, network device 120 may determine that the parameter csi-numrepetition ce (R CSI ) Is determined as a predetermined number. If the network device 120 determines the parameter csi-NumRepetitionCE (R CSI ) 1, the terminal device 110 may determine that the modulation scheme related to the PDSCH is 64QAM. In some embodiments, if network device 120 determines that the channel condition is unstable, network device 120 may determine a parameter csi-numrepetition ce (R CSI ) Greater than 1.
At block 410, the network device 120 may determine second configuration information related to the modulation based on at least one of the channel condition and the response from the terminal device. In some embodiments, the second configuration may include DCI. In some embodiments, if the network device 120 determines that the channel condition is good, the network device 120 may determine the second configuration information to indicate that the PDSCH is not repeated. In other embodiments, if the network device 120 determines that the channel condition is not good, the network device 120 may determine the second configuration information to indicate that the PDSCH has repetition. In an example embodiment, network device 120 may receive a Negative Acknowledgement (NACK) from terminal device 110 multiple times. For example, if the number of NACKs received from terminal device 110 exceeds a threshold (e.g., 5 times), network device 120 may determine the second configuration information to indicate that PDSCH has repetition.
At block 415, the network device 120 may send the first configuration information to the terminal device 110 via higher layer first signaling. In some embodiments, the first signaling may be RRC signaling. At block 420, the network device 120 may send second configuration information to the terminal device 110 via second signaling of the physical layer.
In this way, network device 120 is able to configure the modulation associated with the physical channel in a more flexible manner. For example, if the channel conditions are good and stable, the network device 120 may configure 64QAM via RRC signaling. If the channel conditions are not stable, the network device 120 may dynamically configure the modulation via signaling on the physical layer because the signaling on the physical layer is more dynamic than the signaling on the higher layer.
Fig. 5 is a simplified block diagram of an apparatus 500 suitable for implementing embodiments of the present disclosure. Device 500 may be implemented at network device 120. Device 500 may also be implemented at terminal device 110. As shown, the apparatus 500 includes one or more processors 510, one or more memories 520 coupled to the processor(s) 510, one or more transmitters and/or receivers (TX/RX) 540 coupled to the processor(s) 510.
Processor 510 may be of any type suitable to the local technology network and may include one or more of general purpose computers, special purpose computers, microprocessors, digital Signal Processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples. The device 500 may have multiple processors (e.g., application specific integrated circuit chips) that are slaved in time to a clock that is synchronized to the master processor.
Memory 520 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology (e.g., non-transitory computer-readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory, as non-limiting examples).
Memory 520 stores at least a portion of program 530. TX/RX 540 is used for two-way communication. TX/RX 540 has at least one antenna to facilitate communication, but in practice the access node referred to in the present application may have several antennas. The communication interface may represent any interface necessary to communicate with other network elements.
As discussed herein with reference to fig. 2-4, assume that program 530 comprises program instructions that, when executed by associated processor 510, enable apparatus 500 to operate in accordance with embodiments of the present disclosure. That is, embodiments of the present disclosure may be implemented by computer software executable by the processor 510 of the device 500, or by hardware, or by a combination of software and hardware.
While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any disclosure or of what may be claimed, but rather as descriptions of features specific to particular embodiments of particular disclosures. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
Similarly, although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order or sequence shown or that all illustrated operations be performed to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated in a single software product or packaged in multiple software products.
Various modifications, adaptations to the foregoing exemplary embodiments of this disclosure will become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings. Any and all modifications will still fall within the scope of the non-limiting and exemplary embodiments of this disclosure. Moreover, other embodiments of the disclosure described herein will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure presented in the foregoing specification and associated drawings.
Therefore, it is to be understood that the embodiments of the disclosure are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (24)
1. A method implemented at a terminal device for communication, comprising:
obtaining first configuration information related to modulation of a physical channel from a network device and via a higher layer first signaling, wherein the first configuration information indicates whether a number of subframes of a Channel State Information (CSI) reference resource is or exceeds a predetermined number;
obtaining second configuration information related to the modulation from the network device and via second signaling of a physical layer, wherein the second configuration information indicates whether transmission of the physical channel has repetition; and
a modulation scheme associated with the physical channel is determined based on the first configuration information and the second configuration information.
2. The method of claim 1, wherein obtaining the first configuration information comprises:
the first configuration information is obtained via Radio Resource Control (RRC) signaling.
3. The method of claim 1, wherein determining the modulation scheme comprises:
the modulation scheme is determined as a modulation scheme having an order exceeding a predetermined value in response to the first configuration information indicating that a number of subframes of a Channel State Information (CSI) reference resource is a predetermined number.
4. The method of claim 1, wherein determining the modulation scheme related to PDSCH comprises:
the modulation scheme is determined to be a modulation scheme having an order exceeding a predetermined value in response to:
the first configuration information indicates that a number of subframes of a Channel State Information (CSI) reference resource exceeds a predetermined number, an
The second configuration information indicates that transmission of the physical channel is not repeated.
5. The method of claim 1, wherein determining the modulation scheme comprises:
the modulation scheme is determined to be a modulation scheme having an order of a predetermined value or below in response to:
the first configuration information indicates that a number of subframes of a Channel State Information (CSI) reference resource exceeds a predetermined number, an
The second configuration information indicates that the transmission of the physical channel has repetition.
6. The method of any of claims 1-5, wherein the physical channel is a Physical Downlink Shared Channel (PDSCH).
7. A method implemented at a network device for communication, comprising:
determining first configuration information related to modulation of a physical channel based on channel conditions between the network device and a terminal device, wherein the first configuration information indicates that a number of subframes of a Channel State Information (CSI) reference resource is a predetermined number;
determining second configuration information related to the modulation based on at least one of the channel condition and a response from the terminal device, wherein the second configuration information indicates that the transmission of the physical channel has repetition;
transmitting the first configuration information to the terminal equipment via a first signaling of a higher layer; and
and sending the second configuration information to the terminal equipment through second signaling of a physical layer.
8. The method of claim 7, wherein transmitting the first configuration information comprises:
the first configuration information is sent to the terminal device via Radio Resource Control (RRC) signaling.
9. The method of claim 7, wherein determining the first configuration information comprises:
in response to the quality of the channel exceeding a predetermined threshold and the variation in the channel condition being below a predetermined threshold during a given time, the first configuration information is determined to indicate a predetermined number of subframes of a Channel State Information (CSI) reference resource.
10. The method of claim 7, wherein determining the second configuration information based on at least one of the channel condition and the response from the terminal device comprises:
the second configuration information is determined to indicate that the transmission of the physical channel has repetition in response to a number of Negative Acknowledgements (NACKs) received from the terminal device exceeding a predetermined threshold.
11. The method of any of claims 7-10, wherein the physical channel is a Physical Downlink Shared Channel (PDSCH).
12. A terminal device, comprising:
at least one processor; and
a memory coupled to the at least one processor, the memory storing instructions therein that, when executed by the at least one processor, cause a network device to perform actions comprising:
obtaining first configuration information related to modulation of a physical channel from the network device and via higher layer first signaling, wherein the first configuration information indicates whether a number of subframes of a Channel State Information (CSI) reference resource is or exceeds a predetermined number;
obtaining second configuration information related to the modulation from the network device and via second signaling of a physical layer, wherein the second configuration information indicates whether transmission of the physical channel has repetition; and
a modulation scheme associated with the physical channel is determined based on the first configuration information and the second configuration information.
13. The terminal device of claim 12, wherein obtaining the first configuration information comprises:
the first configuration information is obtained via Radio Resource Control (RRC) signaling.
14. The terminal device of claim 12, wherein determining the modulation scheme comprises:
the modulation scheme is determined as a modulation scheme having an order exceeding a predetermined value in response to the first configuration information indicating that a number of subframes of a Channel State Information (CSI) reference resource is a predetermined number.
15. The terminal device of claim 12, wherein determining the modulation scheme related to PDSCH comprises:
the modulation scheme is determined to be a modulation scheme having an order exceeding a predetermined value in response to:
the first configuration information indicates that a number of subframes of a Channel State Information (CSI) reference resource exceeds a predetermined number, an
The second configuration information indicates that transmission of the physical channel is not repeated.
16. The terminal device of claim 12, wherein determining the modulation scheme comprises:
the modulation scheme is determined to be a modulation scheme having an order of a predetermined value or below in response to:
the first configuration information indicates that a number of subframes of a Channel State Information (CSI) reference resource exceeds a predetermined number, an
The second configuration information indicates that the transmission of the physical channel has repetition.
17. The terminal device according to any of claims 12-16, wherein the physical channel is a Physical Downlink Shared Channel (PDSCH).
18. A network device, comprising:
at least one processor; and
a memory coupled to the at least one processor, the memory storing instructions therein that, when executed by the at least one processor, cause a terminal device to perform actions comprising:
determining first configuration information related to modulation of a physical channel based on channel conditions between the network device and the terminal device, wherein the first configuration information indicates that a number of subframes of a Channel State Information (CSI) reference resource is a predetermined number;
determining second configuration information related to the modulation based on at least one of the channel condition and a response from the terminal device, wherein the second configuration information indicates that the transmission of the physical channel has repetition;
transmitting the first configuration information to the terminal equipment via a first signaling of a higher layer; and
and sending the second configuration information to the terminal equipment through second signaling of a physical layer.
19. The network device of claim 18, wherein transmitting the first configuration information comprises:
the first configuration information is sent to the terminal device via Radio Resource Control (RRC) signaling.
20. The network device of claim 18, wherein determining the first configuration information comprises:
in response to the quality of the channel exceeding a predetermined threshold and the variation in the channel condition being below a predetermined threshold during a given time, the first configuration information is determined to indicate a predetermined number of subframes of a Channel State Information (CSI) reference resource.
21. The network device of claim 18, wherein determining the second configuration information based on at least one of the channel condition and the response from the terminal device comprises:
the second configuration information is determined to indicate that the transmission of the physical channel has repetition in response to a number of Negative Acknowledgements (NACKs) received from the terminal device exceeding a predetermined threshold.
22. The network device of any of claims 18-21, wherein the physical channel is a Physical Downlink Shared Channel (PDSCH).
23. A computer readable medium having stored thereon instructions, which when executed by at least one processing unit of a machine, cause the machine to perform the method according to any of claims 1 to 6.
24. A computer readable medium having stored thereon instructions, which when executed by at least one processing unit of a machine, cause the machine to perform the method according to any of claims 7 to 11.
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| PCT/CN2017/104651 WO2019061365A1 (en) | 2017-09-29 | 2017-09-29 | Methods， devices and computer readable mediums for a modulation of downlink transmission |
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|---|---|---|---|---|
| CN103561475A (en) * | 2012-05-11 | 2014-02-05 | 英特尔公司 | Signaling for downlink coordinated multipoint in a wireless communication system |
| CN106031067A (en) * | 2014-03-20 | 2016-10-12 | 英特尔Ip公司 | Methods, systems, and devices for modulation and coding scheme signaling for common control channel |
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| US9130784B2 (en) * | 2013-04-22 | 2015-09-08 | Google Technology Holdings LLC | Method and apparatus for enhanced modulation in a wirless communication system |
| KR102046868B1 (en) * | 2013-08-26 | 2019-11-20 | 삼성전자주식회사 | Method and apparatus for operating multiple modulation schemes in a wireless communication system |
| US9942013B2 (en) * | 2014-05-07 | 2018-04-10 | Qualcomm Incorporated | Non-orthogonal multiple access and interference cancellation |
| US10447454B2 (en) * | 2015-04-29 | 2019-10-15 | Lg Electronics Inc. | Method and device for feeding back channel state information in wireless access system supporting machine type communication |
| CN107615807A (en) * | 2015-05-14 | 2018-01-19 | 株式会社Ntt都科摩 | User terminal, wireless base station and wireless communications method |
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| CN103561475A (en) * | 2012-05-11 | 2014-02-05 | 英特尔公司 | Signaling for downlink coordinated multipoint in a wireless communication system |
| CN106031067A (en) * | 2014-03-20 | 2016-10-12 | 英特尔Ip公司 | Methods, systems, and devices for modulation and coding scheme signaling for common control channel |
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