CN109547155B

CN109547155B - Method and apparatus for link adaptation

Info

Publication number: CN109547155B
Application number: CN201710868979.8A
Authority: CN
Inventors: 姜大洁; 吴凯
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-09-22
Filing date: 2017-09-22
Publication date: 2020-08-18
Anticipated expiration: 2037-09-22
Also published as: CN109547155A

Abstract

The embodiment of the invention provides a link self-adaption method and equipment, wherein the method comprises the following steps: determining the sequence length and/or the transmitting power of a target advanced indication signal according to communication related parameters of terminal equipment, wherein the target advanced indication signal is used for indicating whether the terminal equipment carries out blind detection on a downlink control channel, and the communication related parameters of the terminal equipment and the sequence length and/or the transmitting power of the target advanced indication signal have a corresponding relation; and sending the target advance indication signal to the terminal equipment according to the sequence length and/or the transmission power of the target advance indication signal. The method of the embodiment of the invention can reduce the overhead of the advanced indication signal, avoid resource waste and improve the system capacity designed by the advanced indication signal.

Description

Method and apparatus for link adaptation

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for link adaptation.

Background

In a wireless communication network, in order to avoid power consumption of a terminal device caused by a Physical Downlink Control Channel (PDCCH) being monitored by the terminal device all the time, a Discontinuous Reception (DRX) mechanism is introduced. For a terminal device in an Idle (Idle) state, a function of monitoring a PDCCH is started when a paging time arrives, an active period is entered, the PDCCH is monitored in the active period, and the terminal device enters a sleep state again after the active period elapses. For a terminal device in a Connected (Connected) state, the PDCCH is monitored and received during an active period (On Duration), and data of a downlink channel is not received during a dormant period (Opportunity for DRX) to save power consumption.

In order to further save the power consumption of the terminal device for blind detection of the PDCCH, in each DRX cycle or before the terminal device blindly detects the PDCCH, the network device transmits a Wake-up Signal (WUS) to the terminal device, the terminal device wakes up at a corresponding time to detect the Wake-up Signal, if the Wake-up Signal is detected, the terminal device blindly detects the PDCCH, otherwise, the terminal device does not perform the blind detection of the PDCCH. Or the network equipment transmits a Go-to-sleep (Go-to-sleep) signal to the terminal equipment, the terminal equipment wakes up at corresponding time to detect the sleep signal, if the sleep signal is detected, the UE does not perform blind detection on the PDCCH, otherwise, the terminal equipment performs blind detection on the PDCCH.

The wake-up signal and the sleep signal may also be used before the terminal device blindly detects the PDCCH in the Connected (Connected) state and DRX off. The wake-up signal and the sleep signal may be indicated by one sequence, or may be indicated by DTX (Discontinuous Transmission), that is, the network device indicates whether the terminal device blindly detects the PDCCH by sending nothing. The wake-up signal and the sleep signal may also be represented by a channel-coded Payload (Payload).

The wake-up signal and the sleep signal may be collectively referred to as an early indication signal, and in the prior art, sequence lengths of the early indication signals of all terminal devices in a cell are the same, and the sequence lengths need to meet requirements of users at the edge of the cell, which causes unnecessary resource waste and affects system capacity of early indication signal design.

Disclosure of Invention

The embodiment of the invention provides a link self-adaption method and equipment, which are used for solving the problems of resource waste caused by the fact that the sequence lengths of advanced indication signals of all terminal equipment in a cell are the same and system capacity of the advanced indication signal design is influenced.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, a method for link adaptation is provided, which is applied to a network device, and includes:

determining the sequence length and/or the transmitting power of a target advanced indication signal according to communication related parameters of terminal equipment, wherein the target advanced indication signal is used for indicating whether the terminal equipment carries out blind detection on a downlink control channel or not, and the communication related parameters of the terminal equipment and the sequence length and/or the transmitting power of the target advanced indication signal have a corresponding relation; and

and sending the target advance indication signal to the terminal equipment according to the sequence length and/or the transmission power of the target advance indication signal.

In a second aspect, a method for link adaptation is provided, which is applied to a terminal device, and includes:

detecting a target early indication signal, wherein the sequence length and/or the transmission power of the target early indication signal are determined by network equipment according to communication related parameters of terminal equipment, the target early indication signal is used for indicating whether the terminal equipment carries out blind detection on a downlink control channel, and the communication related parameters of the terminal equipment and the sequence length and/or the transmission power of the target early indication signal have a corresponding relation; and

and executing the operation indicated by the target advance indication signal according to the target advance indication signal.

In a third aspect, a network device is provided, including:

the processing module is used for determining the sequence length and/or the transmitting power of a target advanced indication signal according to communication related parameters of terminal equipment, wherein the target advanced indication signal is used for indicating whether the terminal equipment carries out blind detection on a downlink control channel, and the communication related parameters of the terminal equipment and the sequence length and/or the transmitting power of the target advanced indication signal have a corresponding relation; and

and the transceiver module is used for sending the target advance indication signal to the terminal equipment according to the sequence length and/or the transmitting power of the target advance indication signal.

In a fourth aspect, a terminal device is provided, which includes:

a first processing module, configured to detect a target early indication signal, where a sequence length and/or a transmission power of the target early indication signal are determined by a network device according to a communication related parameter of a terminal device, where the target early indication signal is used to indicate whether the terminal device performs blind detection on a downlink control channel, and a correspondence relationship exists between the communication related parameter of the terminal device and the sequence length and/or the transmission power of the target early indication signal; and

and the second processing module is used for executing the operation indicated by the target advance indication signal according to the target advance indication signal.

In a fifth aspect, a network device is provided, which includes: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of link adaptation as set forth in the first aspect.

In a sixth aspect, a terminal device is provided, which includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of link adaptation according to the second aspect.

In a seventh aspect, a computer-readable medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for link adaptation according to the first aspect.

In an eighth aspect, a computer-readable medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of link adaptation as set forth in the second aspect.

In a ninth aspect, there is provided a computer program product comprising instructions which, when executed by a computer, cause the computer to perform the method of link adaptation of the first aspect. In particular, the computer program product may be run on the network device of the third aspect described above.

A tenth aspect provides a computer program product comprising instructions, which when executed by a computer, performs the method for link adaptation of the second aspect, and in particular, can be executed on a terminal device of the fourth aspect.

In the embodiment of the invention, the network equipment determines the sequence length and/or the transmitting power of the advance indication signal sent to the terminal equipment according to the communication related parameters of the terminal equipment. Therefore, the network equipment can configure different sequence lengths and/or transmitting powers for the advanced indication signals of the terminal equipment with different communication related parameters, the overhead of the advanced indication signals can be reduced while the terminal equipment is ensured to correctly receive the advanced indication signals, the resource waste is avoided, and the system capacity designed by the advanced indication signals can be improved.

Drawings

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic flow diagram of a method of link adaptation according to one embodiment of the invention.

Fig. 2 is a schematic flow chart diagram of a method of link adaptation according to another embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a network device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a network device according to another embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the specification and in the claims, "A and/or B" means at least one of A and B, namely three cases of A, B, A and B.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS) or a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a 5G System, or a New Radio (NR) System.

In the embodiment of the present invention, the Terminal device may include, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a User Equipment (UE), a handset (handset), a portable device (portable Equipment), a vehicle (vehicle), etc., and the Terminal device may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal device may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile apparatus.

The network device related to the embodiment of the invention is a device which is deployed in a wireless access network and used for providing a wireless communication function for terminal equipment. The network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices having a base station function may differ. For example, in an LTE network, referred to as an Evolved node B (eNB or eNodeB), in a third Generation (3rd Generation, 3G) network, referred to as a node B (node B), and so on.

The early indication signal in the embodiment of the present invention may be a Wake-up signal (WUS) in the related art or a sleep-to-sleep signal (Go-to-sleep) in the related art.

The sequence length of the early indication signal in the embodiment of the present invention refers to the length of a sequence carrying the early indication signal.

Fig. 1 illustrates a method of link adaptation according to one embodiment of the invention. As shown in fig. 1, the method 100 includes:

s110, determining the sequence length and/or the transmitting power of a target advanced indication signal according to the communication related parameters of the terminal equipment, wherein the target advanced indication signal is used for indicating whether the terminal equipment needs to carry out blind detection on a downlink control channel, and the communication related parameters of the terminal equipment and the sequence length and/or the transmitting power of the target advanced indication signal have a corresponding relation.

It can be known that the target-ahead indication signal is used to indicate whether the terminal device needs to perform blind detection on the downlink control channel only as an example, the target advance indication signal may also be used to indicate whether the terminal device needs to perform Radio Resource Management (RRM) measurement, a search space type of a downlink control channel that the terminal device needs to blindly detect, a downlink control information format DCI format transmitted on the downlink control channel that the terminal device needs to blindly detect, a time interval between the downlink control channel that the terminal device needs to blindly detect and the target advance indication signal, a semi-persistent scheduling period of the terminal device, a semi-persistent scheduling Resource of the terminal device, a duration of a DRX inactivity timer of the terminal device, and a semi-persistent detection PDCCH period of the terminal device. The following embodiments are only described by taking the downlink control channel blind detection as an example, and are not limited.

It should be noted that in S110, the terminal device may be in one of the following states: a Radio Resource Control (RRC) Connected (Connected) state, an RRC Idle (Idle) state, and an RRC Idle (Inactive) state.

It can be understood that, in S110, the Downlink Control signal may specifically be a Physical Downlink Control Channel (PDCCH) in the existing communication system.

Optionally, in some embodiments, the sequence of the target-early-indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences. The sequence of the target-early indication signal may also be other sequences, which is not limited in this embodiment of the present invention. The sequence of target advance indication signals may be transmitted on a single beam in the case of a single beam or on the plurality of beams in the case of a plurality of beams.

Optionally, in some embodiments, the sequence length of the target advance indication signal is two, that is, the configuration of the sequence length is two. First sequence configuration: the sequence length is 63, in which case the network device maps the target-early indication signal on 63 consecutive or non-consecutive subcarriers on one Orthogonal Frequency Division Multiplexing (OFDM) symbol when sending the target-early indication signal to the terminal device. Or the network device maps the target advance indication signal on a total of 63 subcarriers over a plurality of OFDM symbols, the subcarriers on each OFDM symbol being continuous or discontinuous. Second sequence configuration: the sequence length is 127, in which case the network device maps the target-early-indication signal on the continuous or discontinuous 127 subcarriers of one OFDM symbol when sending the target-early-indication signal to the terminal device. Or the network device maps the target advance indication signal on a plurality of continuous or discontinuous 127 subcarriers in total, wherein the subcarriers on each OFDM symbol are continuous or discontinuous.

Alternatively, the sequence lengths of the target-ahead indication signals in different states may be different. For example, in the idle state, the sequence length of the target advance indicator signal is only one, such as 127; in the connected state, the sequence length of the target advance indicator signal is two, such as 127 and 63.

Optionally, in S110, the communication related parameter of the terminal device has a corresponding relationship with the sequence length and/or the transmission power of the early indication signal, and may be understood as including: (a) the value of the communication related parameter has a specific corresponding relation with the sequence length and/or the transmitting power; (b) the sequence length and/or transmit power varies with the communication-related parameter.

Optionally, in some embodiments, the communication related parameter of the terminal device comprises at least one of the following parameters: the aggregation level of a downlink control channel search space of a terminal device, Reference Signal Receiving Power (RSRP) measured by the terminal device, Reference Signal Received Quality (RSRQ) measured by the terminal device, Signal-to-noise Ratio (SNR) measured by the terminal device, Channel Quality Indicator (CQI) measured by the terminal device, Rank Indicator (RI) measured by the terminal device, a time length of last sleep of the terminal device, a time interval between a time when the terminal device has last completed downlink synchronization and a current time, a moving speed of the terminal device, and a moving state of the terminal device.

Correspondingly, in S110, the corresponding relationship may include at least one of the following corresponding relationships: the higher the aggregation level of a downlink control channel search space of the terminal equipment is, the longer the sequence length of the target advanced indication signal is, and the larger the transmitting power of the target advanced indication signal is; the smaller the value of RSRP, RSRQ, SNR, CQI or RI measured by the terminal equipment is, the longer the sequence length of the target advance indication signal is. The greater the transmit power of the target-advance indication signal; the longer the time of the terminal equipment sleeping for the last time is, the longer the sequence length of the target advance indication signal is, and the larger the sending power of the target advance indication signal is; the longer the time interval between the time when the terminal equipment completes downlink synchronization for the last time and the current time, the longer the sequence length of the target advanced indication signal, and the larger the transmitting power of the target advanced indication signal; and the higher the moving speed of the terminal equipment is, the longer the sequence length of the target advance indication signal is, and the larger the transmission power of the target advance indication signal is.

Optionally, as an example, the network device determines the sequence length of the target early indication signal according to a correspondence between the aggregation level of the downlink control channel search space of the terminal device and the sequence length of the early indication signal. Table 1 shows one way of correspondence. As shown in table 1, if the aggregation level of the downlink control channel search space of the terminal device is 1 or 2, the sequence length of the target advance indication signal is 63. If the aggregation level of the downlink control channel search space of the terminal device is 4, 8 or 16, the sequence length of the target advance indication signal is 127.

TABLE 1

The network device may perform rounding processing on an average value of aggregation levels of the downlink control channel search spaces that have been configured to the terminal device for the last time or a few times, and use a value obtained by the rounding processing as an aggregation level of the downlink control channel search space according to which the sequence length of the target advance indicator signal is determined. For example, if the aggregation levels of the downlink control channel search spaces configured to the terminal device by the network device for the last 3 times are respectively 1, 4, and 8, the average value of 1, 4, and 8 is rounded to obtain 4, and the sequence length of the target advance indicator signal is 127 according to the corresponding relationship in table 1, and 127 subcarriers are occupied.

Optionally, as another example, the network device determines the sequence length of the target early indication signal according to a correspondence between an RSRP, an RSRQ, an SNR, a CQI, or an RI measured by the terminal device and the sequence length of the early indication signal, where table 2 shows one manner of the correspondence.

TABLE 2

The network device may use an average value of RSRP, RSRQ, SNR, CQI, or RI measured at the last one or several times as the RSRP, RSRQ, SNR, CQI, or RI according to which the sequence length of the target advance indication signal is determined. For example, the RSRP measured by the terminal device for the last 3 times is-20 dB, -80dB, and-50 dB, and the RSRP measured for the 3 times is averaged to obtain-50 dB, and then the sequence length of the target advance indication signal is determined to be 63 according to the corresponding relationship in table 2, and 63 subcarriers are occupied. For another example, if the RI measured by the terminal device for the last time is 1, the sequence length of the target advance indicator signal is 127, and 127 subcarriers are occupied, according to the correspondence in table 2.

Optionally, as another example, the network device determines the sequence length of the target early indication signal according to a correspondence between the time when the terminal device has last slept and the sequence length of the early indication signal. Table 3 shows one way of correspondence. Since the longer the terminal device sleeps, the higher the possibility that the terminal device is out of synchronization, a longer sequence is needed to help the terminal device perform downlink synchronization. Therefore, in the correspondence relationship shown in table 3, the longer the sleep time, the longer the sequence length of the advance instruction signal.

TABLE 3

Length of time of last sleep	Indicating in advance the sequence length of a signal
		<＝200ms	63
>200ms	127

For example, if the network device determines that the time length of the last sleep of the terminal device is 300ms, it determines that the sequence length of the target advance indication signal is 127 and occupies 127 subcarriers according to the correspondence shown in table 3. If the network device determines that the time length of the last sleep of the terminal device is 100ms, the sequence length of the target advanced indication signal is 63 according to the corresponding relation shown in table 3, and 63 subcarriers are occupied.

Optionally, as another example, the network device determines the sequence length of the target advance indicator signal according to a correspondence between a time interval from a time when the terminal device completes downlink synchronization last to a current time and the sequence length of the advance indicator signal. Table 4 shows one way of correspondence. Since the longer the time interval between the time when the terminal device completes downlink synchronization last time and the current time, the higher the possibility that the terminal device is out of synchronization, a longer sequence is needed to help the terminal device synchronize. Therefore, in the correspondence shown in table 4, the longer the time interval, the longer the advance indication signal sequence length.

TABLE 4

For example, if the network device determines that the time interval between the time when the terminal device completes downlink synchronization for the last time and the current time is 400ms, it determines that the sequence length of the target advance indication signal is 127 according to the correspondence shown in table 4, and occupies 127 subcarriers. If the network device determines that the time length of the last sleep of the terminal device is 80ms, the sequence length of the target advanced indication signal is 63 according to the corresponding relation shown in table 4, and 63 subcarriers are occupied.

Optionally, as another example, the network device determines the sequence length of the target early indication signal according to a correspondence between the moving speed or moving state of the terminal device and the sequence length of the early indication signal. Table 5 shows one way of correspondence.

TABLE 5

Moving state	Speed of movement	Indicating in advance the sequence length of a signal
			Medium and low speed	<30Km/h	63
High speed	>＝30Km/h	127

For example, if the network device determines that the moving speed of the terminal device is 10Km/h, it determines that the sequence length of the target advance indication signal is 63 and 63 subcarriers are occupied according to the correspondence shown in table 5. If the network device determines that the moving speed of the terminal device is 70Km/h, the sequence length of the target advance indication signal is 127 according to the corresponding relation shown in table 5, and 127 subcarriers are occupied.

It should be noted that the correspondence relationship in the above embodiment is merely an example, and in specific implementation, the sequence length of the target advance indication signal may be determined by combining at least two correspondence relationships among the correspondence relationships shown in tables 1 to 5.

In the embodiment of the present invention, optionally, the correspondence may be specified by a protocol, may be agreed in advance by the network device and the terminal device, and may also be notified to the terminal device by the network device through information. For example, the network device sends first information to the terminal device, where the first information is used to indicate the correspondence. Specifically, the first information may indicate a corresponding relationship between communication related parameters such as an aggregation level of a downlink control channel search space of the terminal device, RSRP, RSRQ, SNR, CQI, RI measured by the terminal device, a time length of a latest sleep of the terminal device, a time interval between a latest time when the terminal device completes downlink synchronization and a current time, a moving speed or a moving state of the terminal device, and a sequence length of the advance indication signal. Optionally, the first information may specifically include the correspondence shown in table 1 to table 5.

Alternatively, as an example, in the two configurations of the sequence length of the advance indication signal described above, for convenience of description, the first sequence configuration is described as sequence configuration 1, and the second sequence configuration is described as sequence configuration 2. The first information indirectly indicates a correspondence relationship between the communication-related parameter and the sequence length of the advance indication signal by indicating a correspondence relationship between the communication-related parameter and the sequence configuration.

As an example, as shown in table 6, the first information indicates a correspondence between an aggregation level of a downlink control channel search space and a sequence configuration, and the terminal device may determine a sequence length of the target advance indicator signal according to the aggregation level of the configured downlink control channel search space and the correspondence shown in table 6. For example, if the terminal sets the aggregation level of the configured downlink control channel search space to be 2, the terminal device determines, according to table 6, that the sequence configuration of the target advance indicator signal is sequence configuration 1, and according to the description above, the sequence length corresponding to the sequence configuration 1 is 63.

TABLE 6

As another example, as shown in table 7, the configuration information indicates a corresponding relationship between RSRP, RSRQ, SNR, CQI, or RI and the sequence configuration, and the terminal device may determine the sequence length of the target advance indicator signal according to the measured RSRP, RSRQ, SNR, CQI, or RI and the corresponding relationship shown in table 7. For example, if the RI measured by the terminal device is 1, the terminal device determines, according to table 7, that the sequence configuration corresponding to the target advance indication signal is sequence configuration 2, and according to the above description, the sequence length corresponding to the sequence configuration 2 is 127.

TABLE 7

And S120, sending the target advance indication signal to the terminal equipment according to the sequence length and/or the transmitting power of the target advance signal.

Optionally, in some embodiments, the terminal device belongs to a terminal device group, the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on the downlink control channel, and communication related parameters of the terminal devices in the terminal device group satisfy the same condition. That is, the target advance indication signal may be used to indicate whether a group of terminal devices performs blind detection on the downlink control channel, and then the communication-related parameters of the group of terminal devices are the same or similar.

For example, as shown in table 8, the aggregation level of the downlink control channel search space of the terminal device in the terminal device group 1 is 1 or 2, and the aggregation level of the downlink control channel search space of the terminal device in the terminal device group 2 is 4, 8, or 16. Or as shown in table 9, the RSRP measured by the terminal devices in terminal device group 1 is greater than or equal to-80 dB, and the RSRP measured by the terminal devices in terminal device group 2 is less than-80 dB.

TABLE 8

Aggregation level of downlink control channel search space	Terminal equipment group
		1，2	1
4，8，16	2

TABLE 9

It can be understood that, if the early indication signal indicates whether a group of terminal devices performs blind detection on the downlink control signal, the network device may send the target early indication signal to the group of terminal devices in a broadcast manner, or send the target early indication signal to each terminal device in the group of terminal devices in a unicast manner, which is not limited in this embodiment of the present invention.

In this embodiment of the present invention, optionally, the sequence length of the target advance indication signal is used to indicate information related to blind detection of the downlink control channel. Wherein the information related to the blind detection of the downlink control channel comprises an indication of one of the following information: the aggregation level of the downlink control channel search space of the terminal device, the bandwidth portion (BWP) of the terminal device that needs to perform downlink control channel blind detection, and the number of OFDM symbols and/or the OFDM symbol index (index) used for performing downlink control channel blind detection on the timeslot where the downlink control channel of the terminal device is located. The BWP where the terminal device needs to perform blind detection of the downlink control channel is the BWP where the search space of the downlink control channel where the terminal device needs to perform blind detection is located, so that the blind detection times of the terminal device can be reduced.

Optionally, as an example, the correspondence between the sequence length of the early indication signal and the information related to the blind detection of the downlink control channel may be predefined by a protocol, or may be notified to the terminal device by the network device through information. For example, table 10 shows the correspondence between the sequence configuration of the advance indicator signal and the aggregation level of the downlink control channel search space, the BWP, and the number of OFDM symbols. Where it is assumed in table 10 that the system bandwidth of the communication system is 80MHz, BWP index (index)1 indicates the high-frequency end 40MHz of 80MHz, BWP index2 indicates the low-frequency end 40MHz of 80MHz, and BWP index3 indicates the entire 80MHz bandwidth.

Watch 10

When the terminal device detects the target advanced indication signal and the target advanced indication signal indicates the terminal device to perform blind detection of the downlink control channel, the terminal device can determine the aggregation level of the downlink control channel search space according to the sequence length of the target advanced indication signal and the table 10, and the blind detection frequency can be reduced. Or the terminal device determines the BWP index that needs to perform blind detection of the downlink control channel according to the sequence length of the target advanced indication signal and the table 10, so as to reduce the number of blind detections. Or the terminal device determines the number of OFDM symbols and/or OFDM symbol index used for performing downlink control channel blind detection on the time slot where the downlink control channel is located according to the sequence length of the target advanced indication signal and the table 10.

In this embodiment of the present invention, optionally, the network device sends second information to the terminal device, where the second information is used to indicate a set of early indication signal sequences, where the set of early indication signal sequences includes a plurality of sequences of early indication signals with different lengths, and the plurality of sequences of early indication signals with different lengths include the sequence of the target early indication signal. In this case, the plurality of sequences of early indication signals with different lengths included in the set of early indication signal sequences may be understood as a plurality of sequences that may be received by the terminal device, or as one of the plurality of sequences included in the set of early indication signal sequences that the network device transmits the target early indication signal to the terminal device. In the set of sequences of the early indication signal, a plurality of sequences may be transmitted on a single beam in the case of a single beam, and each of the set of sequences of the early indication signal may be transmitted on each of the plurality of beams in the case of a multi-beam.

It is to be understood that the second information may also be defined by the protocol, in which case the network device does not need to send the second information to the terminal device, and the terminal device may directly obtain the second information defined in the protocol.

In this embodiment of the present invention, optionally, the network device sends third information to the terminal device, where the third information is used to indicate a target sequence length, and the target sequence length is used by the terminal device to determine a sequence of the target advance indication signal. Specifically, when the terminal device knows the length of the target sequence, it does not know what the sequence of the target early indication signal the network device is to send to itself, and the terminal device needs to determine the sequence of the target early indication signal according to the length of the target sequence and the set of the sequence of the target early indication signal. Generally, the terminal device determines a sequence with a length of a target sequence in the sequence set of the early indication signals as a sequence of the target early indication signals.

Fig. 2 is a method of link adaptation according to another embodiment of the present invention. The method 200 may be performed by a terminal device. It is to be understood that the interaction between the network device and the terminal device described from the terminal device side is the same as that described in the network device side, and the related description is appropriately omitted to avoid redundancy. As shown in fig. 2, the method 200 includes:

s210, a target advanced indication signal is detected, the sequence length and/or the transmission power of the target advanced indication signal are determined by network equipment according to communication related parameters of terminal equipment, the target advanced indication signal is used for indicating whether the terminal equipment carries out blind detection on a downlink control channel, and the communication related parameters of the terminal equipment and the sequence length and/or the transmission power of the target advanced indication signal have a corresponding relation.

Optionally, in some embodiments, the terminal device blindly detects the advanced indication signals of different lengths. The terminal device receives second information sent by the network device or second information defined in an acquisition protocol, wherein the second information is used for indicating a sequence set of the early indication signals, the sequence set of the early indication signals comprises a plurality of sequences of the early indication signals with different lengths, and the sequences of the early indication signals with different lengths comprise the sequence of the target early indication signal. Correspondingly, the terminal equipment detects the sequences of the plurality of advanced indication signals with different lengths at a plurality of preset time frequency resource positions.

It can be understood that, when the terminal device receives second information sent by the network device or acquires second information defined in a protocol, where the second information is used to indicate a set of advanced indicator signal sequences, the terminal device does not know a sequence of a target advanced indicator signal to be sent to the terminal device by the network device and a length of the sequence, the terminal device detects a plurality of sequences of advanced indicator signals with different lengths at a plurality of preset time-frequency resource locations, the sequence of the advanced indicator signal detected by the terminal device is a sequence of the target advanced indicator signal sent to the terminal device by the network device, and the terminal device may also determine the length of the sequence of the target advanced indicator signal.

Specifically, in some embodiments, the terminal device performs a predetermined matching operation on a sequence of the advanced indication signals received at a plurality of preset time-frequency resource positions and a plurality of sequences of the advanced indication signals with different lengths, detects whether the sequence of the target advanced indication signal is received according to a relationship between a result of the predetermined matching operation processing and a preset threshold, and determines the length of the sequence of the target advanced indication signal at the same time. For example, the predetermined matching operation processing described above may be a correlation processing of two sequences. For example, the sequence of the target-advance indication signal is: 11011011011011, the terminal device performs a correlation operation on the sequence "11011011011011" and the received sequence of the advanced indication signal sent by the network device, and if the obtained correlation value is greater than a certain positive threshold value, the terminal device determines that the sequence of the target advanced indication signal is received and obtains the sequence length information. If the target advanced indication signal indicates that the terminal equipment needs to perform blind detection on the downlink control channel, the terminal equipment wakes up at the corresponding time to perform the blind detection on the downlink control channel, otherwise, the terminal equipment continues to keep the dormant state.

Optionally, in some embodiments, the frequency domain resources included in the preset time-frequency resources are fixed frequency domain resources, for example, several subcarriers in the center of the system bandwidth. Or the frequency domain resource is implicitly indicated to the terminal device, for example, the frequency domain resource index is bound with the ID of the terminal device. Or the frequency domain resource is indicated to the terminal device by the network device through signaling display, for example, the network device informs the terminal device of the index of the frequency domain resource through a system message, RRC signaling, a media access control Element (MAC CE), first layer (layer 1, L1) control information, or second layer (layer2, L2) control information.

Optionally, in some embodiments, the time domain resource included in the preset time frequency resource is implicitly indicated to the terminal device, for example, the time domain resource (e.g., OFDM symbol, Slot (Slot), or mini-Slot) index is bound with the ID of the terminal device. Or the time domain resource is indicated to the terminal device by the network device through signaling display, for example, the network device informs the terminal device of the index of the time domain resource through a system message, RRC signaling, MAC CE, L1control information, or L2control information.

Optionally, in other embodiments, the terminal device determines a target sequence length, and determines a sequence with a length equal to the target sequence length in the advance indication signal sequence set as a sequence of the target advance indication signal. And then the terminal equipment detects the sequence of the target advanced indication signal at the time-frequency resource position corresponding to the target sequence length. In this case, when the terminal device knows the length of the target sequence, it does not know what the sequence of the target early indication signal the network device is to send to itself, and the terminal device needs to determine the sequence of the target early indication signal according to the length of the target sequence and the above-mentioned set of sequences of the early indication signals.

Optionally, as an example, the terminal device receives third information sent by the network device, where the third information is used to indicate the target sequence length, and the terminal device determines the target sequence length according to the third information. The third indication information may carry a semi-static notification in RRC signaling to the terminal device.

Optionally, as another example, the terminal device determines the length of the target sequence according to the communication related parameter and the correspondence. The terminal device determines the length of the target sequence according to the communication related parameters and the corresponding relations shown in tables 1 to 5. Or the terminal equipment determines the length of the target sequence according to the corresponding relation between the communication related parameters and the corresponding relation shown in the table 6 or the table 7.

And S220, executing the operation indicated by the target advance indication signal according to the target advance indication signal.

Specifically, in some embodiments, if the target advance indication signal indicates the terminal device to perform blind detection of the downlink control channel, the terminal device wakes up at a corresponding time to perform blind detection of the downlink control channel. And if the target early indication signal indicates that the terminal equipment does not carry out blind detection on the downlink control channel, the terminal equipment continues to keep the sleep state.

Optionally, in some embodiments, the network device indicates which sequence of the early indication signal the terminal device has to indicate that the terminal device performs blind detection on the downlink control channel, and the sequence of the early indication signal indicates that the terminal device does not perform blind detection on the downlink control channel (i.e., the terminal device continues to sleep or enters a sleep state). The network device may indicate by an implicit indication manner, for example, the index of the sequence is bound to the ID of the terminal device, and the terminal device determines, according to the index of the sequence and its own ID, the operation indicated by the received advance indication signal. Or the network device indicates the sequence by a display indication method, for example, the network device and the terminal device know the numbers of all the sequences and the specific sequence corresponding to each number in advance, the network device informs the index of the sequence of the terminal device through system information, RRC signaling, MAC CE, L1Control information, or L2Control information, and the terminal can know the specific sequence indicated by the network device according to the index of the sequence informed by the network device and the specific sequence corresponding to each index.

Optionally, in some embodiments, the network device and the terminal device may agree in advance, and if the terminal device detects the target early indication signal, the terminal device needs to perform blind detection on the downlink control channel, otherwise, the blind detection on the downlink control channel is not performed. In this case, if the terminal device detects the target advance indication signal in S210, the terminal device blindly detects the downlink control channel in S220. If the terminal device does not detect the target early indication signal in S210, the terminal device does not perform blind detection of the downlink control channel in S220, that is, the terminal device remains in a sleep state.

In this embodiment of the present invention, optionally, the communication related parameter of the terminal device includes at least one of the following parameters:

the method comprises the steps of obtaining an aggregation level of a downlink control channel search space of the terminal equipment, reference signal received power RSRP obtained by the terminal equipment through measurement, reference signal received quality RSRQ obtained by the terminal equipment through measurement, signal to noise ratio SNR obtained by the terminal equipment through measurement, channel quality indication CQI obtained by the terminal equipment through measurement, rank indication RI obtained by the terminal equipment through measurement, the latest sleeping time of the terminal equipment, a time interval between the latest downlink synchronization completion time of the terminal equipment and the current time, the moving speed of the terminal equipment and the moving state of the terminal equipment.

In the embodiment of the present invention, optionally, the corresponding relationship includes at least one of the following corresponding relationships:

the higher the aggregation level of a downlink control channel search space of the terminal equipment is, the longer the sequence length of the target advanced indication signal is, and the larger the transmission power of the target advanced indication signal is;

the smaller the value of RSRQ, RSRP, SNR, CQI or RI measured by the terminal equipment is, the longer the sequence length of the target advance indication signal is, the larger the transmission power of the target advance indication signal is;

the longer the time length of the terminal equipment sleeping for the last time is, the longer the sequence length of the target advanced indication signal is, and the larger the transmission power of the target advanced indication signal is;

the longer the time interval between the time when the terminal device completes downlink synchronization for the last time and the current time, the longer the sequence length of the target advanced indication signal, and the larger the transmission power of the target advanced indication signal; and

the larger the moving speed of the terminal equipment is, the longer the sequence length of the target advance indication signal is, and the larger the transmitting power of the target advance indication signal is.

In the embodiment of the present invention, optionally, the terminal device receives first information sent by the network device, where the first information is used to indicate the correspondence; or, the terminal device obtains the corresponding relation defined in the protocol

In this embodiment of the present invention, optionally, the terminal device belongs to a terminal device group, and the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on the downlink control signal, where communication related parameters of the terminal devices in the terminal device group satisfy the same condition.

In this embodiment of the present invention, optionally, the sequence length of the target early indication signal is used to indicate information related to blind detection of a downlink control channel;

wherein S220 specifically is:

determining the information related to the blind detection of the downlink control channel according to the sequence length of the target advanced indication signal;

and carrying out blind detection on the downlink control channel according to the information related to the blind detection of the downlink control channel.

In this embodiment of the present invention, optionally, the information related to blind detection of the downlink control channel includes at least one of the following information:

the aggregation level of the search space of the downlink control channel of the terminal device, the bandwidth part BWP of the terminal device, which needs to perform blind detection of the downlink control channel, and the number of OFDM symbols and/or the index of OFDM symbols used for performing blind detection of the downlink control channel on the time slot of the downlink control channel of the terminal device.

In this embodiment of the present invention, optionally, the sequence of the target early indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences.

The method for link adaptation according to the embodiment of the present invention is described in detail above with reference to fig. 1 and 2, and the network device according to the embodiment of the present invention will be described in detail below with reference to fig. 3.

Fig. 3 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in fig. 3, the network device 10 includes:

a processing module 11, configured to determine, according to a communication related parameter of a terminal device, a sequence length and/or a transmission power of a target advanced indication signal, where the target advanced indication signal is used to indicate whether the terminal device performs blind detection on a downlink control channel, and a correspondence relationship exists between the communication related parameter of the terminal device and the sequence length and/or the transmission power of the target advanced indication signal; and

a transceiver module 12, configured to send the target-ahead indication signal to the terminal device according to the sequence length and/or the transmission power of the target-ahead indication signal.

According to the network equipment of the embodiment of the invention, the sequence length and/or the transmitting power of the advance indication signal sent to the terminal equipment are determined according to the communication related parameters of the terminal equipment. Therefore, the network equipment can configure different sequence lengths and/or transmitting powers for the advanced indication signals of the terminal equipment with different communication related parameters, the overhead of the advanced indication signals can be reduced while the terminal equipment is ensured to correctly receive the advanced indication signals, the resource waste is avoided, and the system capacity designed by the advanced indication signals can be improved.

Optionally, as an embodiment, the communication related parameter of the terminal device includes at least one of the following parameters:

Optionally, as an embodiment, the correspondence includes at least one of the following correspondences:

the smaller the value of RSRP, RSRQ, SNR, CQI or RI measured by the terminal equipment is, the longer the sequence length of the target advance indication signal is, the larger the transmission power of the target advance indication signal is;

Optionally, as an embodiment, the transceiver module 12 is further configured to:

and sending first information to the terminal equipment, wherein the first information is used for indicating the corresponding relation.

and sending second information to the terminal equipment, wherein the second information is used for indicating a set of advanced indication signal sequences, the set of advanced indication signal sequences comprises a plurality of sequences of advanced indication signals with different lengths, and the plurality of sequences of advanced indication signals with different lengths comprise the sequence of the target advanced indication signal.

and sending third information to the terminal equipment, wherein the third information is used for indicating a target sequence length, and the target sequence length is used for determining the sequence of the target advance indication signal by the terminal equipment.

Optionally, as an embodiment, the terminal device belongs to a terminal device group, and the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on a downlink control channel, where communication related parameters of the terminal devices in the terminal device group meet the same condition.

Optionally, as an embodiment, the sequence length of the target-early indication signal is used to indicate information related to blind detection of a downlink control channel.

Optionally, as an embodiment, the information related to blind detection of the downlink control channel includes at least one of the following information:

Optionally, as an embodiment, the sequence of the early indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences.

The network device according to the embodiment of the present invention may refer to the flow corresponding to the method 100 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the network device are respectively for implementing the corresponding flow in the method 100, and are not described herein again for brevity.

Fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 4, the terminal device 20 includes:

a first processing module 21, configured to detect a target early indication signal, where a sequence length and/or a transmission power of the target early indication signal are determined by a network device according to a communication related parameter of a terminal device, where the target early indication signal is used to indicate whether the terminal device performs blind detection on a downlink control channel, and a correspondence relationship exists between the communication related parameter of the terminal device and the sequence length and/or the transmission power of the target early indication signal; and

and the second processing module 22 is configured to execute the operation indicated by the target advance indication signal according to the target advance indication signal.

The sequence length and/or the transmitting power of the target advanced indication signal detected by the terminal equipment according to the embodiment of the invention are determined by the network equipment according to the communication related parameters of the terminal equipment, so that the network equipment can configure different sequence lengths and/or transmitting powers for the advanced indication signals of the terminal equipment with different communication related parameters, the overhead of the advanced indication signal can be reduced, the resource waste is avoided, and the system capacity designed by the advanced indication signal can be improved.

Optionally, as an embodiment, the first processing module 21 is specifically configured to:

receiving second information sent by a network device or the second information defined in an acquisition protocol, where the second information is used to indicate a sequence set of early indication signals, where the sequence set of early indication signals includes a plurality of sequences of early indication signals with different lengths, and the sequences of early indication signals with different lengths include the sequence of the target early indication signal.

Optionally, as an embodiment, in terms of detecting the target early indication signal, the first processing module 21 is specifically configured to:

and detecting the sequences of the plurality of advanced indication signals with different lengths at a plurality of preset time frequency resource positions.

Optionally, as an embodiment, the first processing module 21 is further configured to:

determining the target sequence length;

determining a sequence with the length being the length of the target sequence in the advanced indication signal sequence set as a sequence of the target advanced indication signal;

in terms of detecting the target advance indication signal, the first processing module 21 is specifically configured to:

and detecting the sequence of the target advance indication signal at the time-frequency resource position corresponding to the target sequence length.

receiving third information sent by a network device, wherein the third information is used for indicating the target sequence length;

in terms of determining the length of the target sequence, the first processing module 21 is specifically configured to:

and determining the length of the target sequence according to the indication information.

and determining the sequence length of the target advanced indication signal according to the communication related parameters of the terminal equipment and the corresponding relation.

the smaller the value of RSRQ, RSRP, SNR, CQI or RI measured by the terminal equipment is, the longer the sequence length of the target advance indication signal is, the larger the transmitting power of the target advance indication signal is;

receiving first information sent by network equipment, wherein the first information is used for indicating the corresponding relationship; or, acquiring the corresponding relation defined in the protocol.

Optionally, as an embodiment, the terminal device belongs to a terminal device group, and the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on the downlink control signal, where communication related parameters of the terminal devices in the terminal device group meet the same condition.

Optionally, as an embodiment, the target advance indication signal is used to indicate the terminal device to perform blind detection on the downlink control channel, and a sequence length of the target advance indication signal is used to indicate information related to the blind detection of the downlink control channel;

the second processing module 22 is specifically configured to:

Optionally, as an embodiment, the sequence of the target early indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences.

The terminal device according to the embodiment of the present invention may refer to the flow corresponding to the method 200 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the terminal device are respectively for implementing the corresponding flow in the method 200, and are not described herein again for brevity.

Fig. 5 shows a schematic structural diagram of a network device according to another embodiment of the present invention. As shown in fig. 5, network device 100 includes a processor 110, a transceiver 120, a memory 130, and a bus interface. Wherein:

in this embodiment of the present invention, the network device 100 further includes: a computer program stored in the memory 130 and capable of running on the processor 110, where the computer program, when executed by the processor 110, implements the processes in the method 100, and can achieve the same technical effects, and in order to avoid repetition, the details are not described here.

In FIG. 5, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors, represented in particular by processor 110, and memory, represented by memory 130, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 120 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 110 is responsible for managing the bus architecture and general processing, and the memory 130 may store data used by the processor 110 in performing operations.

Fig. 6 shows a schematic structural diagram of a terminal device according to another embodiment of the present invention, and as shown in fig. 6, the terminal device 200 includes: at least one processor 210, memory 220, at least one network interface 230, and a user interface 240. The various components in the receiving end device 200 are coupled together by a bus system 250. It will be appreciated that the bus system 250 is used to enable communications among the components. The bus system 250 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 250 in fig. 6.

The user interface 240 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It will be appreciated that memory 220 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (PROM), an erasable programmable Read-only memory (erasabprom, EPROM), an electrically erasable programmable Read-only memory (EEPROM), or a flash memory. The volatile memory may be a Random Access Memory (RAM) which functions as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (staticiram, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (syncronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and direct memory bus SDRAM (DRRAM). The memory 220 of the subject systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 220 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 221 and application programs 222.

The operating system 221 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 222 includes various applications, such as a media player (MediaPlayer), a Browser (Browser), and the like, for implementing various application services. A program implementing a method according to an embodiment of the invention may be included in the application 222.

In this embodiment of the present invention, the terminal device 200 further includes: a computer program stored on the memory 220 and capable of running on the processor 210, wherein the computer program, when executed by the processor 210, implements the processes of the method 200, and can achieve the same technical effects, and further description is omitted here to avoid repetition.

The method disclosed in the above embodiments of the present invention may be applied to the processor 210, or implemented by the processor 210. The processor 210 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 210. The processor 210 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 220, and the processor 210 reads the information in the memory 220 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer-readable storage medium has stored thereon a computer program which, when executed by the processor 210, implements the steps of the method embodiments as in the method 200 described above.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the

methods

100 and 200, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Embodiments of the present invention further provide a computer program product including instructions, and when a computer executes the instructions of the computer program product, the computer executes the method for link adaptation of the above method embodiments. In particular, the computer program product may be run on the network device and the terminal device described above.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for link adaptation, applied to a network device, includes:

determining the sequence length and/or the transmitting power of a target advanced indication signal according to communication related parameters of terminal equipment, wherein the target advanced indication signal is used for indicating whether the terminal equipment carries out blind detection on a downlink control channel, and the communication related parameters of the terminal equipment and the sequence length and/or the transmitting power of the target advanced indication signal have a corresponding relation; and

2. The method of claim 1, wherein the communication-related parameters of the terminal device comprise at least one of the following parameters:

3. The method of claim 2, wherein the correspondence comprises at least one of the following correspondences:

4. The method according to any one of claims 1 to 3, further comprising:

5. The method of claim 1, further comprising:

6. The method of claim 5, further comprising:

7. The method according to claim 1, wherein the terminal device belongs to a terminal device group, and the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on a downlink control channel, and then communication related parameters of the terminal devices in the terminal device group satisfy the same condition.

8. The method of claim 1, wherein a sequence length of the target-early indication signal is used to indicate information related to blind detection of a downlink control channel.

9. The method of claim 8, wherein the information related to the blind detection of the downlink control channel comprises at least one of the following information:

the aggregation level of the search space of the downlink control channel of the terminal device, the bandwidth part BWP of the terminal device, which needs to perform blind detection of the downlink control channel, and the number of OFDM symbols and/or OFDM symbol index, which are used for performing blind detection of the downlink control channel, in the time slot of the downlink control channel of the terminal device.

10. The method of claim 1, wherein the sequence of the target advance indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences.

11. A link adaptation method is applied to a terminal device, and is characterized by comprising the following steps:

12. The method of claim 11, further comprising:

receiving second information sent by a network device or acquiring predefined second information, where the second information is used to indicate a set of early indication signal sequences, where the set of early indication sequences includes a plurality of sequences of early indication signals with different lengths, and the plurality of sequences of early indication signals with different lengths include the sequence of the target early indication signal.

13. The method of claim 12, wherein detecting a target advance indication signal comprises:

14. The method of claim 12, further comprising:

determining the length of a target sequence;

wherein the detecting the target-ahead indication signal comprises:

15. The method of claim 14, further comprising:

wherein the determining the length of the target sequence comprises:

and determining the length of the target sequence according to the third information.

16. The method of claim 14, wherein the determining the target sequence length comprises:

and determining the length of the target sequence according to the communication related parameters of the terminal equipment and the corresponding relation.

17. The method according to any of claims 11 to 16, wherein the communication related parameters of the terminal device comprise at least one of the following parameters:

18. The method of claim 17, wherein the correspondence comprises at least one of the following correspondences:

19. The method of claim 11, further comprising:

receiving first information sent by network equipment, wherein the first information is used for indicating the corresponding relationship; or the like, or, alternatively,

and acquiring the predefined corresponding relation.

20. The method according to claim 11, wherein the terminal device belongs to a terminal device group, and the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on a downlink control channel, and then communication related parameters of the terminal devices in the terminal device group satisfy the same condition.

21. The method of claim 11, wherein a sequence length of the target advanced indication signal is used to indicate information related to blind detection of a downlink control channel;

wherein the performing the operation indicated by the target-advance indication signal comprises:

22. The method of claim 21, wherein the information related to the blind detection of the downlink control channel comprises at least one of the following information:

23. The method of claim 11, wherein the sequence of the target advance indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences.

24. A network device, comprising:

25. The network device of claim 24, wherein the communication-related parameters of the terminal device comprise at least one of the following parameters:

26. The network device of claim 25, wherein the correspondence comprises at least one of the following correspondences:

the higher the aggregation level of a downlink control channel search space of the terminal equipment is, the longer the sequence length of the target advanced indication signal is, and the larger the transmission power of the advanced indication signal is;

27. The network device of any of claims 24-26, wherein the transceiver module is further configured to:

28. The network device of claim 24, wherein the transceiver module is further configured to:

29. The network device of claim 28, wherein the transceiver module is further configured to:

30. The network device according to claim 24, wherein the terminal device belongs to a terminal device group, and the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on a downlink control channel, so that communication related parameters of the terminal devices in the terminal device group satisfy the same condition.

31. The network device of claim 24, wherein a sequence length of the target advance indication signal is used to indicate information related to blind detection of a downlink control channel.

32. The network device of claim 31, wherein the information related to blind detection of the downlink control channel comprises at least one of the following information:

33. The network device of claim 24, wherein the sequence of the target advance indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences.

34. A terminal device, comprising:

a first processing module, configured to detect a target early indication signal, where a sequence length and/or a transmission power of the target early indication signal are determined by a network device according to a communication related parameter of a terminal device, where the early indication signal is used to indicate whether the terminal device performs blind detection on a downlink control channel, and a correspondence relationship exists between the communication related parameter of the terminal device and the sequence length and/or the transmission power of the target early indication signal; and

35. The terminal device of claim 34, wherein the first processing module is further configured to:

36. The terminal device of claim 35, wherein in detecting a target-early-indication signal, the first processing module is specifically configured to:

37. The terminal device of claim 35, wherein the first processing module is further configured to:

determining the length of a target sequence;

in the aspect of detecting the target advance indication signal, the first processing module is specifically configured to:

and detecting the sequence of the target advanced indication signal at the time-frequency domain resource position corresponding to the target sequence length.

38. The terminal device of claim 37, wherein the first processing module is further configured to:

in terms of determining the length of the target sequence, the first processing module is specifically configured to:

39. The terminal device of claim 37, wherein the first processing module is specifically configured to:

40. The terminal device according to any of claims 34 to 39, wherein the communication related parameters of the terminal device comprise at least one of the following parameters:

41. The terminal device according to claim 40, wherein the correspondence comprises at least one of the following correspondences:

42. The terminal device of claim 34, wherein the first processing module is further configured to:

receiving first information sent by network equipment, wherein the first information is used for indicating the corresponding relationship; or, obtaining the predefined corresponding relation.

43. The terminal device according to claim 34, wherein the terminal device belongs to a terminal device group, and the target advance indication signal is further used to indicate whether other terminal devices in the terminal device group perform blind detection on downlink control signals, so that communication-related parameters of terminal devices in the terminal device group satisfy the same condition.

44. The terminal device of claim 34, wherein a sequence length of the target advance indication signal is used to indicate information related to blind detection of a downlink control channel;

wherein the second processing module is specifically configured to:

45. The terminal device of claim 44, wherein the information related to blind detection of the downlink control channel comprises at least one of the following information:

46. The terminal device of claim 34, wherein the sequence of the target advance indication signal is one of the following sequences: gold sequences, m-sequences, ZC sequences and pseudo-random sequences.

47. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method of link adaptation according to any one of claims 1 to 10.

48. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method of link adaptation according to any of claims 11-23.

49. A computer-readable medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method of link adaptation according to any one of claims 1 to 10.

50. A computer-readable medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method of link adaptation according to any one of claims 11-23.