CN112470507B

CN112470507B - Channel detection method and related equipment

Info

Publication number: CN112470507B
Application number: CN201880095994.6A
Authority: CN
Inventors: 薛剑韬; 魏璟鑫; 程铁铮; 吴向春
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2022-01-14
Anticipated expiration: 2038-07-26
Also published as: WO2020019250A1; CN112470507A

Abstract

The application provides a channel detection method and related equipment. The method comprises the following steps: when at least two segments of Physical Downlink Shared Channels (PDSCHs) exist on a system bandwidth, terminal equipment determines respective channel information of the at least two segments of PDSCHs; the terminal equipment determines the priority of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs; and the terminal equipment detects the at least two sections of PDSCHs according to the priority. By the method, the terminal equipment can effectively detect the PDSCH according to the priority when the plurality of segments of PDSCHs exist on the system bandwidth.

Description

Channel detection method and related equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a channel detection method and a related device.

Background

With the continuous development of communication technology, the conventional cellular mobile communication system also faces various challenges, and an internet of things communication system which enables a terminal to save electric energy, operate for a long time and have low cost is desired. Among them, Long Term Evolution (LTE) has proposed a Further Evolved internet of things Communication (mtc) system in version R14, which can meet the above requirements. The FeMTC system is mainly characterized in that the signal receiving bandwidth of the terminal can be smaller than the signal transmitting bandwidth of the base station, so that the power consumption and the complexity of the terminal are reduced. In addition, in the festc system, the base station may repeatedly transmit a Physical Downlink Shared Channel (PDSCH) or a Machine Type Physical Downlink Control Channel (MPDCCH) having the same content for a plurality of times, so that the terminal has more opportunities to demodulate.

The FeMTC system can support frequency hopping communication, signals after frequency hopping of the PDSCH can be dispersedly distributed in a system bandwidth, and if the signals after frequency hopping of the PDSCH exceed the system bandwidth, the frequency domain of the signals after frequency hopping of the PDSCH can be circularly shifted to the other end of the system bandwidth to form two or more segments of PDSCH. As shown in fig. 1, the system bandwidth shown in fig. 1 is 5MHz, and if the frequency of the PDSCH signal exceeds the system bandwidth after frequency hopping, the exceeded part may be shifted to the bottom of the system bandwidth to form two PDSCH segments.

However, the PDSCH divided into multiple segments cannot be detected simultaneously due to possible bandwidth limitation or power saving.

Disclosure of Invention

The technical problem to be solved by the present application is to solve how to select a PDSCH channel for detection when the PDSCH channel is divided into multiple segments on a system bandwidth.

In a first aspect, the present application provides a channel detection method, which is applied to a terminal device, and the method may include: when at least two segments of PDSCHs exist on the system bandwidth, determining respective channel information of the at least two segments of PDSCHs; determining the priority of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs; and detecting the at least two segments of PDSCHs according to the priority.

By implementing the feasible implementation manner, when the PDSCH channel is divided into multiple segments on the system bandwidth, the terminal device can detect the multiple segments of PDSCH according to the priority, and can effectively detect the PDSCH.

As a possible implementation, the respective channel information of the at least two segments of PDSCH may be: whether MPDCCH exists in the subframe where the at least two segments of PDSCH are located. At this time, the determining, by the terminal device, the priorities of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs may include: and determining the priority of a target PDSCH in the at least two segments of PDSCHs as the highest priority, wherein the target PDSCH is the PDSCH of which the subframe has the MPDCCH. The detecting, by the terminal device, the at least two segments of PDSCHs according to the priority may include: and selecting the target PDSCH with the highest priority for detection.

As a possible implementation manner, when detecting the target PDSCH, the terminal device may also detect MPDCCH on a subframe where the target PDSCH is located.

Therefore, by implementing the feasible implementation manner, when the subframe where the PDSCH is located has the MPDCCH and signals of the PDSCH and the MPDCCH can be jointly detected by the terminal device, the terminal device preferentially selects the PDSCH where the subframe has the MPDCCH for detection and simultaneously detects the MPDCCH, so that the PDSCH and the MPDCCH can be simultaneously demodulated in one subframe, the network device can continuously schedule the terminal device, the scheduling time of the terminal device can be shortened, the terminal device can continuously demodulate, and the demodulation performance of the terminal device is improved.

As a possible implementation, the respective channel information of the at least two segments of PDSCH may be: the number of Resource Blocks (RBs) of each of the at least two segments of PDSCH. At this time, the terminal device determines the priorities of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs, which may be: if the number of RBs of a first PDSCH is greater than the number of RBs of a second PDSCH in the at least two segments of PDSCHs, the terminal device may determine that the first PDSCH has a higher priority than the second PDSCH.

If the number of RBs of the PDSCH is large, the decoding accuracy of the signal of the PDSCH may be high when the terminal device detects the PDSCH. Therefore, by implementing the feasible implementation manner, the terminal device determines the PDSCH with the larger number of RBs, the higher the priority of the PDSCH, and the decoding accuracy of the terminal device can be improved when the PDSCH is detected, so that the demodulation performance of the terminal device is improved.

In an embodiment, the terminal device determines the priorities of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs, and may further be: the terminal device may determine that the first PDSCH has a higher priority than the second PDSCH if the number of RBs of the first PDSCH is less than the number of RBs of the second PDSCH in the at least two segments of PDSCHs.

In an embodiment, the terminal device determines the priorities of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs, and may further be: if the number of RBs of the first PDSCH is equal to the number of RBs of the second PDSCH, the terminal device may determine the priorities of the first PDSCH and the second PDSCH randomly or according to a predetermined priority order (for example, the PDSCH with the lower RB number has the higher priority).

As a possible implementation, the respective channel information of the at least two segments of PDSCH may be: and historical quality information of frequency domains where the at least two segments of PDSCHs are respectively located, wherein the historical quality information comprises historical signal-to-noise ratios and/or historical peak-to-average ratios. At this time, the terminal device determines the priorities of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs, which may be: and if the historical quality information of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is better than the historical quality information of the frequency domain of the second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH.

If the frequency domains of the at least two segments of PDSCH are measured by the terminal device historically, historical quality information of the frequency domains of the at least two segments of PDSCH can be stored in the terminal device. By implementing the above possible implementation manner, the terminal device may determine the priorities of the at least two segments of PDSCHs according to historical quality information (e.g., historical peak-to-average ratio and/or historical signal-to-noise ratio), where the higher the historical quality information is, the higher the priority of the PDSCHs is, for example, the historical peak-to-average ratio is high, or the historical signal-to-noise ratio is high. The higher the demodulation speed of the PDSCH with better historical quality information is, the better the demodulation quality of the PDSCH can be, so that when the PDSCH is detected, the terminal device preferentially selects the PDSCH with good quality information for detection, and the demodulation performance of the terminal device can be improved.

As a possible implementation manner, the detecting, by the terminal device, the at least two segments of PDSCHs according to the priority may include: and detecting the at least two segments of PDSCHs in turn according to the sequence of the priorities from high to low in the repetition period of the at least two segments of PDSCHs.

It can be seen that, by implementing the above feasible embodiment, the terminal device detects the at least two segments of PDSCHs according to the order of priorities from top to bottom, so that the at least two segments of PDSCHs can be detected more completely without discarding any one segment, and the terminal device has a frequency selective gain.

As a possible implementation manner, the channel information of each of the at least two segments of PDSCHs may be a current channel quality of each of the at least two segments of PDSCHs, where the current channel quality includes a current peak-to-average ratio and/or a current signal-to-noise ratio. At this time, the terminal device determines the respective channel information of the at least two segments of PDSCHs, including: and receiving the at least two segments of PDSCHs in turn in the repetition period of the at least two segments of PDSCHs, and counting the current channel quality of the at least two segments of PDSCHs. The terminal device determines the priorities of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs, and may include: and if the current channel quality of the frequency domain of the first PDSCH in the at least two sections of PDSCHs is better than the current channel quality of the frequency domain of the second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH. The detecting, by the terminal device, the at least two segments of PDSCHs according to the priority may include: and selecting the PDSCH with the highest priority for detection.

It can be seen that, by implementing the above feasible implementation manner, in the repetition period of the at least two segments of PDSCHs, the terminal device receives the at least two segments of PDSCHs in turn first, and counts the channel quality, and then preferentially detects the PDSCH with the channel quality number, which can ensure that the current channel quality of the at least two segments of PDSCHs is received and counted more completely in the previous period, and none of the segments is discarded, and can select the PDSCH with the best current channel quality for detection in the later period, thereby further improving the demodulation performance of the terminal.

In a second aspect, a terminal device is provided, where the terminal device has a function of implementing a behavior of the terminal device in the first aspect or a possible implementation manner of the first aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The module may be software and/or hardware. Based on the same inventive concept, as the principle and the beneficial effects of the terminal device for solving the problems can refer to the possible method embodiments of the first aspect and the beneficial effects brought thereby, the implementation of the terminal device can refer to the possible method embodiments of the first aspect and the first aspect, and repeated details are omitted.

In a third aspect, a terminal device is provided, which includes: a memory for storing one or more programs; the processor is configured to call the program stored in the memory to implement the scheme in the method design of the first aspect, and for the implementation and the beneficial effects of the terminal device for solving the problem, reference may be made to the implementation and the beneficial effects of each possible method of the first aspect and the first aspect, and repeated details are omitted.

In a fourth aspect, a computer-readable storage medium is provided, where a computer program is stored, where the computer program includes program instructions, and the program instructions, when executed by a processor, cause the processor to perform the method of the first aspect and the embodiments and advantages of each possible method of the first aspect, and repeated details are not repeated.

Drawings

Fig. 1 is a schematic view of a frequency hopped PDSCH provided in an embodiment of the present application;

fig. 2 is a system architecture diagram for channel detection according to an embodiment of the present application;

fig. 3 is a schematic flowchart of a channel detection method according to an embodiment of the present application;

fig. 4 is a schematic flowchart of another channel detection method provided in an embodiment of the present application;

fig. 5 is a schematic view of another PDSCH after frequency hopping according to an embodiment of the present application;

fig. 6 is a schematic flowchart of another channel detection method provided in an embodiment of the present application;

fig. 7 is a schematic view of a PDSCH after another frequency hopping according to an embodiment of the present application;

fig. 8 is a schematic flowchart of another channel detection method provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another terminal device provided in an embodiment of the present application.

Detailed Description

The following description will be made with reference to the drawings in the embodiments of the present application.

In order to better understand a channel detection method and related devices provided in the embodiments of the present application, a network architecture related to the present application is described first below.

Fig. 2 is a block diagram of a system for channel detection according to an embodiment of the present invention. The system may be an internet of Things (IOT) system, wherein the IOT system includes a Further Evolved internet of Things Communication (fesmtc) system. In an embodiment, the system may also be a Long Term Evolution (LTE) mobile communication system, a future Evolution fifth Generation mobile communication (5G) system, a new air interface (NR) system, and other systems capable of supporting frequency hopping communication, which is not limited in this application. As shown in fig. 2, the system may include: one or more terminal devices 201, network devices 202. Wherein:

the terminal device 201 may be a terminal that resides in a cell 203. The terminal devices 201 may be distributed throughout the system. In some embodiments of the present application, the terminal device 201 may be, for example, a fesmtc terminal device, and specifically, the fesmtc terminal device may include, but is not limited to, a mobile device, a mobile station (mobile station), a mobile unit (mobile unit), an M2M terminal, a wireless unit, a remote unit, a user agent, a mobile client, and the like.

In one embodiment, the terminal device 201 may be operable to communicate with the network device 202 via the wireless interface 204.

The network device 202 may be a base station, which may be configured to communicate with one or more terminal devices and may also be configured to communicate with one or more base stations having some terminal functionality (e.g., communication between a macro base station and a micro base station, such as an access point). The Base Station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, an evolved Node B (eNodeB) in an LTE system, and a Base Station in a 5G system or a new air interface (NR) system. In addition, the base station may also be an Access Point (AP), a Transmission Point (TRP), a Central Unit (CU), or other network entities, and may include some or all of the functions of the above network entities.

In particular, the network device 202 may be adapted to communicate with the terminal 203 via the wireless interface 204 under the control of a network device controller (not shown). In some embodiments, the network device controller may be part of the core network or may be integrated into the network device 201.

The wireless interface 204 may be expressed as a channel. Which may include: a Physical Downlink Shared Channel (PDSCH) and a Downlink Control Channel (PDCCH), wherein, when the system shown in fig. 2 is a festc system, the PDCCH may be a Machine Type Physical Downlink Control Channel (MPDCCH).

For one radio frame, 10ms, may be divided into 10 subframes (that is, 1ms per subframe). The MPDCCH may transmit control information, which may be transmitted a preset number (e.g., the first 1-3) of OFDM symbols in front of one subframe. The control information may be used to notify the terminal device of the location of future downlink data or uplink data. The PDSCH may transmit specific traffic data, and may be frequently transmitted on other OFDM symbols of a subframe except for the transmission of MPDCCH.

It should be noted that the system shown in fig. 2 is only for more clearly illustrating the technical solution of the present application, and does not constitute a limitation to the present application, and as a person having ordinary skill in the art knows, with the evolution of network architecture and the emergence of new service scenarios, the technical solution provided in the present application is also applicable to similar technical problems.

The following first presents the general inventive principles of the present application.

The main inventive principles of the present application may include: for a system supporting frequency hopping communication, a signal of the PDSCH may exceed a system bandwidth after frequency hopping, which may cause a frequency domain of the PDSCH frequency-hopped signal to be cyclically shifted to the other end of the system bandwidth, thereby forming two or more PDSCH segments within the system bandwidth. In this case, the terminal device may not be able to detect the multiple PDSCHs simultaneously due to bandwidth limitation or power saving. Therefore, the terminal device needs to select the multiple PDSCH segments, thereby improving the demodulation performance of the terminal. The present application proposes the following solutions to the above problems: determining the priority of at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs on the system bandwidth, and detecting the at least two segments of PDSCHs according to the determined priority.

1) The terminal device may directly select the PDSCH with the highest priority for detection. For example, when the subframe where the PDSCH is located has MPDCCH, the terminal device may determine that the priority of the PDSCH where the subframe where the MPDCCH is located has the highest priority, and may detect the PDSCH where the MPDCCH is located in the subframe where the PDSCH is located for detection until demodulation is successful.

2) The terminal device may detect the at least two segments of PDSCH in turn according to the order of priority from high to low. For example, in the repetition period of the at least two segments of PDSCHs, the terminal device detects the PDSCH with high priority first and then detects the PDSCH with low priority according to the determined priority order, so that detection is performed in turn until demodulation is successful.

3) The terminal device may first receive the at least two segments of PDSCHs in turn, determine the priorities of the at least two segments of PDSCHs, and then select the PDSCH with the highest priority for detection until demodulation is successful.

For a more detailed description, method embodiments of the present application are described below. It is understood that the method described in this application may be implemented by a terminal device, which may be the terminal device 201 in the system shown in fig. 2, and may be implemented as a terminal device of a FeMTC, specifically, a mobile device, a mobile station (mobile station), a mobile unit (mobile unit), a wireless unit, a remote unit, a user agent, a mobile client, and so on.

Please refer to fig. 3, which is a flowchart illustrating a channel detection method according to the present application. The method as shown in fig. 3 may include:

301. when at least two segments of Physical Downlink Shared Channels (PDSCHs) exist on the system bandwidth, determining respective channel information of the at least two segments of PDSCHs.

In one embodiment, the at least two segments of the PDSCH on the system bandwidth may be formed due to frequency hopping. For example, the R14 version of the mtc may support frequency hopping communications, which may cause the PDSCH frequency hopped signal to exceed the system bandwidth, and then cycle in the frequency domain to form at least two segments of PDSCH to the other end of the system bandwidth.

The respective channel information of the at least two segments of PDSCHs may be whether MPDCCH exists in a subframe where the at least two segments of PDSCHs are located, or Resource Block (RB) number of each of the at least two segments of PDSCHs, or historical quality information of frequency domains where the at least two segments of PDSCHs are located, where the historical quality information may include a historical signal-to-noise ratio and/or a historical peak-to-average ratio, or current channel quality of each of the at least two segments of PDSCHs, and the current channel quality includes a current peak-to-average ratio and/or a current signal-to-noise ratio.

When the respective channel information of the at least two segments of PDSCHs is whether MPDCCH exists in the subframe where the at least two segments of PDSCHs are located, or when the respective channel information of the at least two segments of PDSCHs is the number of Resource Blocks (RBs) of the at least two segments of PDSCHs, the terminal device may learn whether MPDCCH exists in the subframe where the at least two segments of PDSCHs are located through a system message sent by the network device.

When the respective channel information of the at least two segments of PDSCHs is the historical quality information of the frequency domains where the at least two segments of PDSCHs are located, or the respective current channel quality of the at least two segments of PDSCHs, the terminal device may determine the historical quality information or the current channel quality by itself.

302. And determining the priority of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs.

The priority of the at least two segments of PDSCH may refer to a priority detection order of the at least two segments of PDSCH. The terminal device may determine the priority of the at least two segments of PDSCHs according to the acquired channel information corresponding to the at least two segments of PDSCHs.

303. And detecting at least two sections of PDSCHs according to the priority.

The terminal device may detect the at least two segments of PDSCH in order of priority from high to low. Or, the terminal device may also select the PDSCH with the highest priority for detection.

Therefore, according to the embodiment of the application, when the PDSCH channel is divided into multiple sections on the system bandwidth, the terminal equipment can detect the at least two sections of PDSCHs according to the priority, the PDSCHs can be effectively detected, and the demodulation performance of the terminal is improved.

In an embodiment, when the respective channel information of the at least two segments of PDSCHs is whether a machine-type physical downlink control channel MPDCCH exists in a subframe where the at least two segments of PDSCHs are located, the determining, by the terminal device, the priority of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs may include: and determining the priority of a target PDSCH in the at least two segments of PDSCHs as the highest priority, wherein the target PDSCH is the PDSCH of which the subframe has the MPDCCH. The detecting, by the terminal device, the at least two segments of PDSCHs according to the priority may include: and selecting the target PDSCH with the highest priority for detection.

Specifically, please refer to fig. 4, where fig. 4 is a schematic flow chart of another channel detection method provided in the present application. The method as shown in fig. 4 may include:

401. when at least two segments of Physical Downlink Shared Channels (PDSCHs) exist on the system bandwidth, determining respective channel information of the at least two segments of PDSCHs.

The channel information is whether the MPDCCH exists in the subframe where the at least two segments of PDSCH are located.

Fig. 5 is a schematic diagram of another scenario of a PDSCH after frequency hopping according to the present application. As can be seen from fig. 5, the signals after frequency hopping of the PDSCH are distributed dispersedly in the system bandwidth, forming two segments of PDSCH. Subframe 1 in which the PDSCH located at the top of the system bandwidth is located includes MPDCCH, and subframe 2 in which the PDSCH located at the bottom of the system bandwidth is located does not include MPDCCH.

In one embodiment, the network device may send a system message to the terminal device, where the system message may include information on whether MPDCCH exists in a subframe where the at least two segments of PDSCH are located. The terminal device receives the system message, and can determine whether the MPDCCH exists in the subframe where the at least two segments of PDSCH are located from the system message.

The MPDCCH may transmit control information, where the control information may be used to inform the terminal device of a location of future uplink data or downlink data.

402. And determining the priority of a target PDSCH in at least two sections of PDSCHs as the highest priority, wherein the target PDSCH is the PDSCH of which the subframe has the MPDCCH.

For example, as shown in fig. 5, the terminal device may determine a PDSCH located at the top of the system bandwidth as a target PDSCH.

403. And selecting the target PDSCH with the highest priority for detection.

The terminal device may select a priority of a target PDSCH in the at least two segments of PDSCHs as a highest priority, and detect the target PDSCH. The terminal device may detect the target PDSCH all the time until demodulation is successful.

In an embodiment, when detecting the target PDSCH, the terminal device may also detect MPDCCH on a subframe where the target PDSCH is located. Since the MPDCCH carries control information and the PDSCH carries service information, the terminal device needs to decode the control information first and then decode the service information before being scheduled by the network device. In the application, the terminal device detects the service information on the target PDSCH and also detects the control information on the MPDCC, and can demodulate the service information while demodulating the control information, so that the terminal device can be continuously scheduled by the network device.

In another embodiment, when the respective channel information of the at least two segments of PDSCHs is the respective RB number of the at least two segments of PDSCHs, or the historical quality information of the frequency domains where the at least two segments of PDSCHs are located, the terminal device may perform alternate detection on the at least two segments of PDSCHs according to the order of priority from high to low.

For example, please refer to fig. 6, which is a flowchart illustrating another channel detection method according to an embodiment of the present application. The method as shown in fig. 6 may include:

601. when at least two segments of Physical Downlink Shared Channels (PDSCHs) exist on the system bandwidth, determining respective channel information of the at least two segments of PDSCHs.

The channel information is the respective RB number of the at least two segments of PDSCH, or is historical quality information of the respective frequency domain of the at least two segments of PDSCH, where the historical quality information includes historical signal-to-noise ratio and/or historical peak-to-average ratio.

In one embodiment, the network device may send a system message to the terminal device, where the system message may include the number of resource blocks RB of each of the at least two segments of PDSCH, or historical quality information of the frequency domain in which each segment of PDSCH is located. After receiving the system message, the terminal device may determine the number of resource blocks RB of each of the at least two segments of PDSCH, or historical quality information of the frequency domain in which each segment of PDSCH is located.

602. And if the historical quality information of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is better than the historical quality information of the frequency domain of the second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH.

Or if the number of RBs of the first PDSCH in the at least two segments of PDSCHs is more than that of the second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH.

Or, if the number of RBs of the first PDSCH in the at least two segments of PDSCHs is less than the number of RBs of the second PDSCH, determining that the priority of the first PDSCH is higher than the priority of the second PDSCH.

Alternatively, when the numbers of RBs in the at least two PDSCH segments are equal, the priorities of the at least two PDSCH segments may be determined randomly or in a predetermined priority order.

603. And detecting the at least two segments of PDSCHs in turn according to the sequence of the priorities from high to low in the repetition period of the at least two segments of PDSCHs.

The network device may set a repetition period for the at least two segments of PDSCH, and may repeatedly transmit the PDSCH or MPDCCH with the same content for multiple times in the repetition period, so that the terminal device may have more opportunities to detect and demodulate.

For example, as shown in fig. 7, a schematic view of another frequency hopped PDSCH scenario provided by the present application is shown. As can be seen from fig. 7, signals before frequency hopping of the PDSCH are concentrated in the system bandwidth, signals after frequency hopping are distributed in the system bandwidth in a scattered manner, so as to form two PDSCH segments, and in the repetition period for the PDSCH, the network device may not transmit signals of the PDSCH having the same content (which may include signals before frequency hopping and signals after frequency hopping). Assuming that in fig. 7, the priority of the PDSCH at the lower end of the system bandwidth is high, and the priority of the PDSCH at the upper end of the system bandwidth is low, in a repetition period of one PDSCH, when the terminal device receives the at least two segments of PDSCH for the first time, the terminal device may preferentially detect the PDSCH at the lower end of the system bandwidth, and when the terminal device receives the at least two segments of PDSCH for the next time, the terminal device may detect the priority of the PDSCH at the upper end of the system bandwidth again, so that the at least two segments of PDSCH are detected in turn until demodulation is successful.

In another embodiment, the terminal device may receive the at least two segments of PDSCHs in turn, then count the current channel information of the at least two segments of PDSCHs, determine the priorities of the at least two segments of PDSCHs, and select the PDSCH with the highest priority for detection.

For example, please refer to fig. 8, which is a flowchart illustrating another channel detection method according to an embodiment of the present application. The method as shown in fig. 8 may include:

801. and receiving at least two PDSCHs in turn in the repetition period of the at least two PDSCHs.

802. And counting the current channel quality of at least two sections of PDSCHs.

Taking fig. 7 as an example, in a repetition period of the PDSCH, when receiving the at least two segments of PDSCH for the first time, the terminal device may randomly receive one of the at least two segments of PDSCH, and count the current channel quality of the frequency domain where the one segment of PDSCH is located. When receiving the at least two segments of PDSCHs next time, the terminal device may receive the at least two segments of PDSCHs again, except other PDSCHs of the received PDSCHs, and count the current channel quality of the frequency domain where the received PDSCHs are located. When the current channel quality of all PDSCHs on the system bandwidth has been counted, the terminal may perform prioritization as shown in step 803.

803. And if the current channel quality of the frequency domain of the first PDSCH in the at least two sections of PDSCHs is better than the current channel quality of the frequency domain of the second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH.

Wherein the current channel quality may be a current signal-to-noise ratio, and/or a current peak-to-average ratio. The higher the current signal-to-noise ratio of the PDSCH, the higher its corresponding priority may be; the higher the current peak-to-average ratio PDSCH, the higher its corresponding priority may be.

804. And selecting the PDSCH with the highest priority for detection.

After determining the priorities of the at least two segments of PDSCHs, the terminal device may select the PDSCH with the highest priority for detection until demodulation is successful, and may not detect PDSCHs other than the PDSCH with the highest priority.

Embodiments of the apparatus of the present application are described below.

Please refer to fig. 9, which is a schematic structural diagram of a terminal device according to the present application. The terminal device as shown in fig. 9 may include:

a first determining module 901, configured to determine, when at least two segments of PDSCH exist on a system bandwidth, respective channel information of the at least two segments of PDSCH.

A second determining module 902, configured to determine priorities of the at least two segments of PDSCHs according to respective channel information of the at least two segments of PDSCHs.

A detecting module 903, configured to detect the at least two segments of PDSCHs according to the priority.

In one embodiment, the channel information of each of the at least two segments of PDSCH includes: whether a machine type physical downlink control channel (MPDCCH) exists in the subframe of the at least two segments of PDSCH or not; the second determining module 902 is specifically configured to determine that the priority of a target PDSCH in the at least two segments of PDSCHs is the highest priority, where the target PDSCH is a PDSCH in which MPDCCH exists in a subframe; the detecting module 903 is specifically configured to select a target PDSCH with the highest priority for detection.

In an embodiment, the detecting module 903 is further configured to detect MPDCCH on a subframe where the target PDSCH is located when detecting the target PDSCH.

In one embodiment, the channel information of each of the at least two segments of PDSCH includes: the number of Resource Blocks (RBs) of the at least two segments of PDSCHs; the second determining module 902 is specifically configured to determine that the priority of the first PDSCH is higher than the priority of the second PDSCH if the number of RBs of the first PDSCH in the at least two segments of PDSCHs is greater than the number of RBs of the second PDSCH.

In one embodiment, the channel information of each of the at least two segments of PDSCH includes: historical quality information of frequency domains of the at least two segments of PDSCHs respectively, wherein the historical quality information comprises historical signal-to-noise ratio and/or historical peak-to-average ratio; the second determining module 902 is specifically configured to determine that the priority of the first PDSCH is higher than the priority of the second PDSCH if the historical quality information of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is better than the historical quality information of the frequency domain of the second PDSCH.

In an embodiment, the detecting module 903 is specifically configured to detect the at least two segments of PDSCHs in turn according to an order of priority from high to low in a repetition period of the at least two segments of PDSCHs.

In one embodiment, the channel information of each of the at least two segments of PDSCH includes: the current channel quality of each of the at least two segments of PDSCH, wherein the current channel quality comprises the current peak-to-average ratio and/or the current signal-to-noise ratio; the first determining module 901 is specifically configured to receive the at least two segments of PDSCHs in turn in the repetition period of the at least two segments of PDSCHs, and count the current channel quality of the at least two segments of PDSCHs; the second determining module 902 is specifically configured to determine that the priority of the first PDSCH is higher than the priority of the second PDSCH if the current channel quality of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is better than the current channel quality of the frequency domain of the second PDSCH; the detecting module 903 is specifically configured to select a PDSCH with the highest priority for detection.

Referring to fig. 10, fig. 10 illustrates a terminal device provided by some embodiments of the present application. As shown in fig. 10, the terminal device may include: one or more terminal device processors 1001, memory 1002, communication interface 1003, transmitter 1005, receiver 1006, coupler 1007, and antenna 1008. These components may be connected by a bus 1004, or otherwise, as illustrated in FIG. 10. Wherein:

the communication interface 1003 may be used for the terminal device to communicate with other communication devices, such as a network device or other terminal devices. Specifically, the network device may be the network device shown in fig. 2. Specifically, the communication interface 903 of the communication interface 1003 may be a Long Term Evolution (LTE) (4G) communication interface, an internet of things communication interface, or a communication interface of a 5G or future new air interface. The terminal devices may also be configured with a wired communication interface 1003 to support wired communication, not limited to wireless communication interfaces, for example, the backhaul link between one terminal device and the other terminal device may be a wired communication connection.

Transmitter 1005 may be used for transmit processing, e.g., signal modulation, of the signal output by terminal device processor 1001. Receiver 1006 may be used for receive processing of mobile communication signals received by antenna 1008. Such as signal demodulation. In some embodiments of the present application, the transmitter 1005 and the receiver 1006 may be considered as one wireless modem. In the terminal device, the number of the transmitter 1005 and the receiver 1006 may be one or more. The antenna 1008 may be used to convert electromagnetic energy in transmission lines to electromagnetic energy in free space, or vice versa. Coupler 1007 may be used to multiplex the mobile communications signal for distribution to a plurality of receivers 1006.

The memory 1002 is coupled to the terminal device processor 1001 for storing various software programs and/or sets of instructions. In particular, the memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 1002 may store an operating system (hereinafter, referred to as a system), such as an embedded operating system like uCOS, VxWorks, RTLinux, or the like. The memory 1002 may also store a network communication program that may be used to communicate with one or more additional devices, one or more terminal devices, and one or more terminal devices.

Terminal device processor 1001 may be used to perform radio channel management, implement call and communication link setup and teardown, and provide cell switching control for users within the control area, etc. Specifically, the terminal device processor 1001 may include: an Administration/Communication Module (AM/CM) (a center for voice channel switching and information switching), a Basic Module (BM) (for performing call processing, signaling processing, radio resource management, management of radio links, and circuit maintenance functions), a code conversion and sub-multiplexing unit (TCSM) (for performing multiplexing/demultiplexing and code conversion functions), and so on.

In this embodiment, the terminal device processor 1001 may be configured to read and execute the computer readable instructions. In one embodiment, terminal device processor 1001 may call a program in memory 1002 to perform the following steps:

when at least two segments of Physical Downlink Shared Channels (PDSCHs) exist on a system bandwidth, determining respective channel information of the at least two segments of PDSCHs;

determining the priority of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs;

and detecting the at least two segments of PDSCHs according to the priority.

It will be appreciated that the terminal device processor 1001 may cooperate with other means of the terminal device to implement the steps described above. For example, the channel information of each of the at least two segments of PDSCHs sent by the network device may be received through the communication interface 1003, and the priority of the at least two segments of PDSCHs is determined by the terminal device processor 1001 according to the channel information of each of the at least two segments of PDSCHs. Of course, the above is merely exemplary and not exhaustive, and terminal device process 1001 may also cooperate with means for terminal devices such as memory 1002, transmitter 1006, receiver 1005, and the like.

It should be further noted that the terminal device processor 1001 may be configured to invoke a program stored in the memory 1002, for example, an implementation program of the channel detection method provided in one or more embodiments of the present application on the terminal device side, and execute an instruction included in the program, which is not described herein again.

It is understood that the terminal device may be the terminal device 202 in the system shown in fig. 2, and may be implemented as a terminal device of a mtc, and specifically may be a mobile device, a mobile station (mobile station), a mobile unit (mobile unit), an M2M terminal, a wireless unit, a remote unit, a user agent, a mobile client, and so on.

It should be noted that the terminal device shown in fig. 10 is only one implementation manner of the embodiment of the present application, and in practical applications, the terminal device may further include more or less components, which is not limited herein.

It should be understood that the embodiments of the present invention are entity device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present invention.

In another embodiment of the present invention, a computer-readable storage medium is provided, which stores a program that, when executed by a processor, can implement the method shown in the terminal device in the present application or implement the method shown in the terminal device.

It should be noted that, for specific processes executed by the processor of the computer-readable storage medium, reference may be made to the methods described in the above method embodiments, and details are not described herein again.

In yet another embodiment of the present invention, a computer program product containing instructions is provided, which when run on a computer, causes the computer to perform the method described in the above method embodiment.

The computer-readable storage medium may be an internal storage unit of the terminal device according to any of the foregoing embodiments, for example, a hard disk or a memory of the terminal device. The computer readable storage medium may also be an external storage device of the computer, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the computer. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal device. The computer-readable storage medium is used for storing the program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.

Based on the same inventive concept, the principle of solving the problem of the computer provided in the embodiment of the present invention is similar to that of the embodiment of the method of the present invention, so the implementation of the computer may refer to the implementation of the method, and is not described herein again for brevity.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a program, which can be stored in a computer-readable storage medium, and when the program is executed, the processes of the embodiments of the methods described above can be included. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The above detailed description is provided for a channel detection method and related devices according to the embodiments of the present invention, and the specific examples are applied herein to explain the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understand the structure, method and core ideas of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method for channel detection, comprising:

and detecting the at least two sections of PDSCHs according to the priority.

2. The method of claim 1, wherein the channel information of each of the at least two segments of the PDSCH comprises: whether a machine type physical downlink control channel (MPDCCH) exists in the subframe where the at least two segments of PDSCHs are located or not;

the determining the priority of the at least two segments of PDSCHs according to the respective channel information of the at least two segments of PDSCHs comprises:

determining the priority of a target PDSCH in the at least two segments of PDSCHs as the highest priority, wherein the target PDSCH is the PDSCH of which the subframe has the MPDCCH;

the detecting the at least two segments of PDSCHs according to the priority comprises:

and selecting the target PDSCH with the highest priority for detection.

3. The method of claim 2, wherein the method further comprises:

and when the target PDSCH is detected, detecting the MPDCCH on the subframe where the target PDSCH is located.

4. The method of claim 1, wherein the channel information of each of the at least two segments of the PDSCH comprises: the number of Resource Blocks (RBs) of the at least two segments of PDSCHs;

if the number of RBs of a first PDSCH in the at least two segments of PDSCHs is more than that of RBs of a second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH.

5. The method of claim 1, wherein the channel information of each of the at least two segments of the PDSCH comprises: historical quality information of frequency domains where the at least two segments of PDSCHs are respectively located, wherein the historical quality information comprises historical signal-to-noise ratios and/or historical peak-to-average ratios;

and if the historical quality information of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is superior to the historical quality information of the frequency domain of the second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH.

6. The method of claim 4 or 5, wherein the detecting the at least two segments of PDSCH according to the priority comprises:

and in the repetition period of the at least two segments of PDSCHs, detecting the at least two segments of PDSCHs in turn according to the sequence of the priorities from high to low.

7. The method of claim 1, wherein the channel information of each of the at least two segments of the PDSCH comprises: the current channel quality of each of the at least two segments of PDSCHs comprises the current peak-to-average ratio and/or the current signal-to-noise ratio;

the determining the respective channel information of the at least two segments of PDSCHs includes:

receiving the at least two segments of PDSCHs in turn in the repetition period of the at least two segments of PDSCHs;

counting the current channel quality of the at least two segments of PDSCHs;

if the current channel quality of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is better than the current channel quality of the frequency domain of the second PDSCH, determining that the priority of the first PDSCH is higher than that of the second PDSCH;

and selecting the PDSCH with the highest priority for detection.

8. A terminal device, comprising:

a first determining module, configured to determine, when at least two segments of PDSCH (physical downlink shared channel) exist in a system bandwidth, respective channel information of the at least two segments of PDSCH;

a second determining module, configured to determine priorities of the at least two segments of PDSCHs according to respective channel information of the at least two segments of PDSCHs;

and the detection module is used for detecting the at least two sections of PDSCHs according to the priority.

9. The terminal device of claim 8, wherein the channel information of each of the at least two segments of PDSCH comprises: whether a machine type physical downlink control channel (MPDCCH) exists in the subframe where the at least two segments of PDSCHs are located or not;

the second determining module is specifically configured to determine that a priority of a target PDSCH in the at least two segments of PDSCHs is a highest priority, where the target PDSCH is a PDSCH in which MPDCCH exists in a subframe where the target PDSCH is located;

the detection module is specifically configured to select a target PDSCH with the highest priority for detection.

10. The terminal device of claim 9, wherein the detecting module is further configured to detect MPDCCH on a subframe where the target PDSCH is located when detecting the target PDSCH.

11. The terminal device of claim 8, wherein the channel information of each of the at least two segments of PDSCH comprises: the number of Resource Blocks (RBs) of the at least two segments of PDSCHs;

the second determining module is specifically configured to determine that the priority of the first PDSCH is higher than the priority of the second PDSCH if the number of RBs of the first PDSCH in the at least two segments of PDSCHs is greater than the number of RBs of the second PDSCH.

12. The terminal device of claim 8, wherein the channel information of each of the at least two segments of PDSCH comprises: historical quality information of frequency domains where the at least two segments of PDSCHs are respectively located, wherein the historical quality information comprises historical signal-to-noise ratios and/or historical peak-to-average ratios;

the second determining module is specifically configured to determine that the priority of the first PDSCH is higher than the priority of the second PDSCH if the historical quality information of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is better than the historical quality information of the frequency domain of the second PDSCH.

13. The terminal device according to claim 11 or 12, wherein the detecting module is specifically configured to detect the at least two segments of PDSCHs in turn according to an order of priority from high to low in a repetition period of the at least two segments of PDSCHs.

14. The terminal device of claim 8, wherein the channel information of each of the at least two segments of PDSCH comprises: the current channel quality of each of the at least two segments of PDSCHs comprises the current peak-to-average ratio and/or the current signal-to-noise ratio;

the first determining module is specifically configured to receive the at least two segments of PDSCHs in turn in the repetition period of the at least two segments of PDSCHs, and count current channel qualities of the at least two segments of PDSCHs;

the second determining module is specifically configured to determine that the priority of the first PDSCH is higher than the priority of the second PDSCH if the current channel quality of the frequency domain of the first PDSCH in the at least two segments of PDSCHs is better than the current channel quality of the frequency domain of the second PDSCH;

the detection module is specifically configured to select a PDSCH with the highest priority for detection.

15. A terminal device, comprising:

a memory for storing a program;

a processor for executing a program in the memory to perform the method of any one of claims 1-7.

16. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a program which, when executed by a processor, causes the computer to perform the method according to any one of claims 1-7.