CN112753259B - Method and device for measuring channel quality - Google Patents

Abstract

The application provides a method and a device for measuring channel quality, wherein the method comprises the following steps: the network equipment configures a downlink carrier set to the terminal equipment; the network equipment carries a first parameter in first information, wherein the first parameter comprises the repetition times of a downlink channel carrying the first information; the terminal device sends second information and third information to the network device, where the second information includes information for indicating channel quality of a first downlink carrier, the third information is used to indicate that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used to indicate that the channel quality of the first downlink carrier is related to a second parameter, the second parameter includes a maximum number of repetitions of a common search space on a second downlink carrier for random access, and the downlink carrier set includes the second downlink carrier. The method for measuring the channel quality is beneficial to saving power consumption of terminal equipment and reducing consumption of system resources.

Description

Method and device for measuring channel quality

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for measuring channel quality.

Background

Machine type communication (machine type communication, MTC), also known as inter-machine communication (machine to machine, M2M), or internet of things (internet of things, ioT), will be an important application in the future communication field. The main possibilities of future internet of things communication include intelligent meter reading, medical detection monitoring, logistics detection, industrial detection monitoring, car networking, intelligent community and wearable device communication. The internet of things industry around MTC communication architecture is considered to be the fourth wave behind computers, the internet and mobile communication networks, which is the direction of development of future networks. By 2022, the number of connections for MTC devices would be expected to reach 500 billion.

Currently, in IoT systems, when a network device schedules a narrowband physical downlink control channel (narrowband physical downlink control channel, NPDCCH) and a narrowband physical downlink shared channel (narrowband physical downlink shared channel, NPDSCH), it is impossible to know the downlink coverage of a terminal device exactly, which causes a large loss in power consumption of the terminal device and consumption of system resources.

Disclosure of Invention

In view of this, the present application provides a method for measuring channel quality, so that the terminal device saves power consumption and reduces consumption of system resources.

In a first aspect, a method of measuring channel quality is provided, the method comprising: the terminal equipment receives configuration information sent by the network equipment, wherein the configuration information is used for configuring a downlink carrier set; the terminal equipment receives first information sent by the network equipment, wherein the first information is used for scheduling a random access process message two Msg2, the first information comprises a first parameter, and the first parameter comprises the repetition times of a downlink channel carrying the first information; the terminal device sends second information and third information to the network device, where the second information includes information for indicating channel quality of a first downlink carrier, the third information is used to indicate that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used to indicate that the channel quality of the first downlink carrier is related to a second parameter, the second parameter includes a maximum number of repetitions of a common search space on a second downlink carrier for random access, and the downlink carrier set includes the second downlink carrier.

In some possible implementations, the configuration information is carried in a system message, which may be a SIB22-NB or other system message.

In some possible implementations, the first downlink carrier includes one or more downlink carriers in the set of downlink carriers.

In the embodiment of the present application, the maximum number of repetitions of the common search space for random access refers to the maximum number of repetitions of the common search space for scheduling random access response (random access response, RAR), msg3 retransmission, or NPDCCH of Msg4, where the RAR may be carried on Msg 2.

According to the method for measuring the channel quality, the terminal equipment reports the channel quality of one or more downlink carriers, and the network equipment can optimize the resource allocation on the carrier based on the channel quality of the downlink carrier, so that the downlink resource efficiency is improved, and the terminal equipment can save power consumption and reduce the consumption of system resources.

And the channel quality reported by the terminal equipment is related to the first parameter or the second parameter, so that the method for reporting the channel quality by the terminal equipment is more flexible, the terminal equipment with different capabilities can be compatible, and meanwhile, the cost for reporting the channel quality by the terminal equipment can be saved.

With reference to the first aspect, in some possible implementations of the first aspect, the first downlink carrier includes a downlink carrier carrying the Msg 2.

In the embodiment of the present application, the terminal device carries the information of the channel quality of the downlink carrier carrying the Msg2 in the Msg3, which is helpful for the network device to optimize the resource allocation of the downlink channel for scheduling the retransmission of the Msg3 and the downlink channel of the Msg4, thereby being helpful for improving the downlink resource efficiency.

With reference to the first aspect, in some possible implementations of the first aspect, the second downlink carrier is a downlink carrier carrying the Msg 2.

With reference to the first aspect, in some possible implementation manners of the first aspect, the first downlink carrier includes a third downlink carrier, where the third downlink carrier is a downlink carrier with a best channel quality in one or more carriers, where the one or more carriers are determined by the terminal device from the downlink carrier set.

And the terminal equipment reports the carrier positions of one or more downlink carriers with the best channel quality in the downlink measurement carrier set and the downlink channel quality corresponding to the carrier in the Msg 3. Based on the result, the network device can allocate the downlink carrier with the best channel quality to the terminal device in the Msg4 to realize the frequency selection scheduling, and meanwhile, based on the downlink channel quality of the carrier, the resource allocation of the NPDCCH and the NPDSCH on the carrier can be optimized, thereby improving the downlink resource efficiency.

With reference to the first aspect, in some possible implementation manners of the first aspect, the first downlink carrier includes a third downlink carrier, where the third downlink carrier is determined by the terminal device according to a preset rule; alternatively, the third downlink carrier is indicated by the network device.

In the embodiment of the present invention, the terminal device reports the channel quality of the downlink carrier determined by the terminal device according to the preset rule or indicated by the network device, and the network device determines the load condition of each carrier according to the channel quality reported by all the terminal devices, for example, according to the statistical data, the carrier with better downlink channel quality is lighter in load, and the carrier with worse downlink channel quality is heavier in load, so that the network device is facilitated to realize load balancing, for example, the partial service of the carrier with heavier load is distributed to the carrier with lighter load.

In the embodiment of the present application, the terminal device carries, in Msg3, information of channel quality of one or more downlink carriers in the downlink carrier set, and the network device may optimize resource allocation on the carrier based on the channel quality of the downlink carrier, thereby helping to improve downlink resource efficiency.

With reference to the first aspect, in some possible implementations of the first aspect, the second downlink carrier is the third carrier, or the second downlink carrier is a downlink carrier carrying the Msg 2.

With reference to the first aspect, in some possible implementation manners of the first aspect, the second downlink carrier is the third carrier, and the second parameter includes a maximum value or a minimum value of a maximum number of repetitions of a common search space for random access on the second downlink carrier.

With reference to the first aspect, in certain possible implementation manners of the first aspect, the sending, by the terminal device, the second information and the third information to the network device includes: the terminal equipment sends the third information to the network equipment before sending a random access procedure message three Msg3 to the network equipment; the terminal device sends the Msg3 to the network device, the Msg3 comprising the second information.

In some possible implementations, the terminal device sends the second information and the third information to the network device, including: the terminal device sends a random access procedure message three Msg3 to the network device, wherein the Msg3 includes the second information and the third information.

According to the method for measuring the channel quality, before the Msg3 is sent, the terminal equipment informs the network equipment of the measured channel quality and the first parameter or the second parameter, and the terminal equipment can only carry the information of the channel quality in the Msg3, so that the signaling overhead of the Msg3 can be saved.

In a second aspect, there is provided a method of measuring channel quality, the method comprising: the network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for configuring a downlink carrier set; the network equipment sends first information to the terminal equipment, wherein the first information is used for scheduling a random access process message two Msg2, the first information comprises a first parameter, and the first parameter comprises the repetition times of a downlink channel carrying the first information; the network device receives second information and third information sent by the terminal device, the second information includes information for indicating channel quality of a first downlink carrier, the third information is used for indicating that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used for indicating that the channel quality of the first downlink carrier is related to a second parameter, the second parameter includes a maximum repetition number of a public search space used for random access on a second downlink carrier, and the downlink carrier set includes the second downlink carrier.

With reference to the second aspect, in some possible implementations of the second aspect, the first downlink carrier includes a downlink carrier carrying the Msg 2.

With reference to the second aspect, in some possible implementations of the second aspect, the second downlink carrier is a downlink carrier carrying the Msg 2.

With reference to the second aspect, in some possible implementation manners of the second aspect, the first downlink carrier includes a third downlink carrier, where the third downlink carrier is a downlink carrier with the best channel quality in one or more carriers, where the one or more carriers are determined by the terminal device from the downlink carrier set; or the third downlink carrier is determined by the terminal equipment according to a preset rule; alternatively, the third downlink carrier is indicated by the network device.

With reference to the second aspect, in some possible implementations of the second aspect, the second downlink carrier is the third carrier, or the second downlink carrier is a downlink carrier carrying the Msg 2.

With reference to the second aspect, in some possible implementations of the second aspect, the second downlink carrier is the third carrier, and the second parameter includes a maximum value or a minimum value of a maximum number of repetitions of a common search space for random access on the second downlink carrier.

In a third aspect, an apparatus for measuring channel quality is provided for performing the method of the first aspect and any possible implementation manner of the first aspect. In particular, the apparatus for measuring channel quality may comprise means for performing the method of the first aspect and any possible implementation of the first aspect.

In a fourth aspect, there is provided an apparatus for measuring channel quality for performing the method of the second aspect and any possible implementation of the second aspect. In particular, the apparatus for measuring channel quality may comprise means for performing the method of the second aspect and any possible implementation of the second aspect.

In a fifth aspect, an apparatus for measuring channel quality is provided, which may be a terminal device in the above method design, or a chip provided in the terminal device. The device comprises: a processor, coupled to the memory, operable to execute instructions in the memory to implement the method performed by the terminal device in the first aspect and any possible implementation manner of the first aspect. Optionally, the apparatus further comprises a memory. Optionally, the apparatus further comprises a communication interface, the processor being coupled to the communication interface.

When the apparatus is a terminal device, the communication interface may be a transceiver, or an input/output interface.

When the apparatus is a chip configured in a terminal device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a sixth aspect, an apparatus for measuring channel quality is provided, which may be a network device in the above method design or a chip provided in the network device. The device comprises: a processor, coupled to the memory, operable to execute instructions in the memory to implement the method performed by the network device in the second aspect and any possible implementation of the second aspect. Optionally, the apparatus further comprises a memory. Optionally, the apparatus further comprises a communication interface, the processor being coupled to the communication interface.

When the apparatus is a network device, the communication interface may be a transceiver, or an input/output interface.

When the apparatus is a chip configured in a network device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a seventh aspect, there is provided a program for performing the method provided in the first to second aspects when being executed by a processor.

In an eighth aspect, there is provided a program product comprising: program code which, when run by a communication unit, a processing unit or transceiver, a processor of an apparatus (e.g. a terminal device or a network device), causes the apparatus to perform any of the methods of the first to second aspects and possible implementations thereof.

A ninth aspect provides a computer readable medium storing a program for causing an apparatus (e.g. a terminal device or a network device) to perform any of the methods of the first to second aspects and possible implementations thereof.

Drawings

Fig. 1 is a schematic diagram of an application scenario of the technical solution provided in the embodiment of the present application.

Fig. 2 is a schematic diagram of a network architecture according to an embodiment of the present application.

Fig. 3 is a schematic diagram of another network architecture according to an embodiment of the present application.

Fig. 4 is a schematic flow chart of a terminal device and a network device provided in an embodiment of the present application to complete random access through four steps.

Fig. 5 is a schematic diagram of a common search space for monitoring Type2 in a random access procedure provided in an embodiment of the present application.

Fig. 6 is a schematic flow chart of a method for measuring channel quality according to an embodiment of the present application.

Fig. 7 is another schematic flow chart of a method of measuring channel quality provided by an embodiment of the present application.

Fig. 8 is a schematic block diagram of an apparatus for measuring channel quality provided by an embodiment of the present application.

Fig. 9 is another schematic block diagram of an apparatus for measuring channel quality provided by an embodiment of the present application.

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

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (global system for mobile communications, GSM), code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, future fifth generation (5th generation,5G) system, or New Radio (NR), etc.

The terminal device in the embodiments of the present application may refer to a user device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user apparatus. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), etc., as the embodiments of the application are not limited in this respect.

The network device in this embodiment of the present application may be a device for communicating with a terminal device, where the network device may be a base station (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access, CDMA), a base station (NodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system, an evolved NodeB (eNB or eNodeB) in an LTE system, a wireless controller in a cloud wireless access network (cloud radio access network, CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., which is not limited in this application.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by running the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

Furthermore, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, or magnetic strips, etc.), optical disks (e.g., compact disk, CD, digital versatile disk, digital versatile disc, DVD, etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory, EPROM), cards, sticks, or key drives, etc. Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

Fig. 1 is a schematic diagram of an application scenario of the technical solution provided in the embodiment of the present application, as shown in fig. 1, a network device 110 and terminal devices 120 to 170 form a communication system, in which, in the communication system, the network device 110 may send downlink information to the terminal devices 120 to 170, and the terminal devices 120 to 170 may also send uplink information to the network device 110. In addition, terminal apparatuses 150 to 170 may also constitute a communication system in which terminal apparatus 160 may transmit information to terminal apparatus 150 and terminal apparatus 170, and terminal apparatus 150 and terminal apparatus 170 may also transmit information to terminal apparatus 160.

It should be understood that the method for measuring channel quality provided in the present application may be applicable to a wireless communication system, for example, in the wireless communication system shown in fig. 1, where two communication devices in the wireless communication system have a wireless communication connection therebetween, and one of the two communication devices may correspond to the terminal device shown in fig. 1, for example, may be the terminal device 160 in fig. 1, or may be a chip configured in the terminal device 160; the other of the two communication apparatuses may correspond to the network device shown in fig. 1, for example, may be the network device 110 in fig. 1, or may be a chip configured in the network device 110.

Fig. 2 is a schematic diagram of a network architecture provided in an embodiment of the present application, and as shown in fig. 2, the network architecture includes a Core Network (CN) device and a radio access network (radio access network, RAN) device. The RAN device includes a baseband device and a radio frequency device, where the baseband device may be implemented by one node, or may be implemented by multiple nodes, and the radio frequency device may be implemented independently from the baseband device, or may be integrated into the baseband device, or a part of the radio frequency device may be integrated into the baseband device. For example, in an LTE communication system, a RAN apparatus (eNB) includes a baseband device and a radio frequency device, where the radio frequency device may be remotely located relative to the baseband device, e.g., a remote radio unit (remote radio unit, RRU) is remotely located relative to the BBU.

The communication between the RAN device and the terminal follows a certain protocol layer structure. For example, the control plane protocol layer structure may include the functions of protocol layers such as a radio resource control (radio resource control, RRC) layer, a packet data convergence layer protocol (packet data convergence protocol, PDCP) layer, a radio link control (radio link control, RLC) layer, a medium access control (media access control, MAC) layer, and a physical layer. The user plane protocol layer structure may include the functions of protocol layers such as PDCP layer, RLC layer, MAC layer, and physical layer; in one implementation, a traffic data adaptation (service data adaptation protocol, SDAP) layer may also be included above the PDCP layer.

The functions of these protocol layers may be implemented by one node, or may be implemented by a plurality of nodes; for example, in one evolution structure, a RAN device may include a Centralized Unit (CU) and a Distributed Unit (DU), and a plurality of DUs may be centrally controlled by one CU. As shown in fig. 2, a CU and a DU may be divided according to protocol layers of a wireless network, for example, functions of a PDCP layer and above are set at the CU, and functions of protocol layers below the PDCP layer, for example, functions of an RLC layer and a MAC layer, etc. are set at the DU.

The RAN device may implement RRC, PDCP, RLC and MAC protocol layer functions by one node; or the functions of the protocol layers may be implemented by a plurality of nodes; for example, in one evolution architecture, a RAN device may include a CU and DUs, and multiple DUs may be centrally controlled by one CU. As shown in fig. 2, a CU and a DU may be divided according to protocol layers of a wireless network, for example, functions of a PDCP layer and above are set at the CU, and functions of protocol layers below the PDCP layer, for example, functions of an RLC layer and a MAC layer, etc. are set at the DU.

The division of the protocol layer is merely an example, and other protocol layers may be divided, for example, division in the RLC layer, where functions of the RLC layer and above are set in the CU, and functions of the protocol layer below the RLC layer are set in the DU; alternatively, the protocol layer may be divided, for example, by setting a part of functions of the RLC layer and functions of protocol layers above the RLC layer to CU, and setting the remaining functions of the RLC layer and functions of protocol layers below the RLC layer to DU. In addition, the functions that require processing time to meet the latency requirement may be set in the DU and the functions that do not require processing time to meet the latency requirement may be set in the CU in other manners, such as time-lapse partitioning.

In addition, the rf device may be remote, not placed in the DU, or may be integrated in the DU, or a portion of the remote may be integrated in the DU, without any limitation.

With continued reference to fig. 3, fig. 3 is a schematic diagram of another network architecture provided in the embodiment of the present application, and, with respect to the architecture shown in fig. 2, the Control Plane (CP) and the User Plane (UP) of the CU may be implemented by separating the control plane CU entity (CU-CP entity) and the user plane CU entity (CU-UP entity) into different entities.

In the above network architecture, the signaling generated by the CU may be transmitted to the terminal device through the DU, or the signaling generated by the terminal device may be transmitted to the CU through the DU. The DU may be passed through to the terminal device or CU directly through protocol layer encapsulation without parsing the signaling. In the following embodiments, transmission or reception of signaling by a DU includes such a scenario if such signaling is involved in the transmission between the DU and the terminal device. For example, the signaling of the RRC or PDCP layer is eventually processed as the signaling of the PHY layer to be transmitted to the terminal device, or is converted from the received signaling of the PHY layer. Under this architecture, the signaling of the RRC or PDCP layer can be considered as being sent by either a DU or by both a DU and a radio frequency.

In the above embodiments, the CU is divided into network devices on the RAN side, and in addition, the CU may be divided into network devices on the CN side, which is not limited herein.

The apparatus in the following embodiments of the present application may be located in a terminal according to the functions implemented by the apparatus. When the above CU-DU structure is adopted, the network device may be a CU node, or a DU node, or a RAN device including the CU node and the DU node.

Before the technical scheme of the embodiment of the application is described, technical terms related to the embodiment of the application are described.

Coverage grade: the network device provides narrowband reference signal received power (narrowband reference signal receiving power, NRSRP) thresholds of different coverage levels in the system information, and the NRSRP thresholds are mainly determined by the network device according to uplink interference conditions (if uplink interference ratio is large, NRSRP thresholds are set to be relatively large, so that more terminal devices are on poor coverage levels, and therefore narrowband physical random access channel (narrowband physical random access channel, NPRACH) resources under the poor coverage levels are selected, NPRACH is sent with more repetition times), and as long as the NRSRP is higher than the threshold, a preamble sequence (preamble) of a random access procedure message one (Msg 1) sent by the terminal device is detected by the network device according to a preset probability.

The narrowband internet of things (narrowband internet of things, NB-IoT) system needs to support a very large coverage, and the scheduling policy of the network devices will be completely different for the terminal devices in different communication environments. For example, the wireless channel condition of the terminal equipment at the central position of the cell is good, the network equipment can establish a reliable communication link by using smaller power, and the data transmission can be rapidly completed by using large transmission code blocks, high-order modulation, carrier binding and other technical means; for terminal devices at the cell edge or in the basement, the wireless channel quality is poor, the network device may need to use larger power to keep the link, and the data transmission can be completed by using small code blocks, low-order modulation, repeated transmission and spread spectrum and other technologies in the data transmission process.

In order to ensure the reliability of communication and save the transmission power of network equipment, terminal equipment with different channel conditions needs to be distinguished so as to facilitate the scheduling of the network equipment. For this reason, the NB-IoT system introduces the concept of coverage class, where the channel transmission conditions of the terminal devices at the same coverage class are similar, and the network devices can employ similar scheduling parameters for such users, which occupy similar control signaling overhead.

For example, NB-IoT systems may be divided into 3 coverage levels, with terminal device coverage levels closer to the network device being "normal coverage" and the number of repetitions being non-repeated; the coverage grade of the terminal equipment far away from the network equipment is 'edge coverage', and the repetition times are moderate; terminal equipment in a basement or like scene has a coverage level of "extended coverage" and may be repeated up to hundreds or even thousands of times. The terminal equipment selects proper transmission times according to the coverage grade, so that unnecessary repetition can be reduced, and power expenditure is reduced.

Fig. 4 shows a schematic flow chart of a terminal device and a network device implementing random access through four steps, which is provided in the embodiment of the present application, and it should be understood that fig. 4 takes contention-based RA (CBRA) in NR as an example, and the process includes:

S210, the terminal device sends a random access procedure message one (Msg 1) to the network device.

It should be appreciated that the random access procedure message one (Msg 1) may also be referred to as a random access request message or a random access preamble sequence (preamble).

The primary function of the preamble is to tell the network device that there is a random access request and enable the network device to estimate the transmission delay between the remaining terminal devices so that the network device calibrates the uplink timing and informs the terminal devices of the calibration information via the random access procedure message two (Msg 2) in S220.

The terminal device may select a preamble for transmission on a physical random access channel (physical random access channel, PRACH). The network device informs the terminal device of the time-frequency resource set of PRACH which can be used for transmitting preamble in the current cell through the system message, and when the terminal device initiates random access, PRACH resources are required to be selected, so that the preamble is transmitted.

Optionally, before the terminal device sends Msg1, the method 200 further includes:

the network device sends a system message to the terminal device, where the system message includes configuration information of an uplink carrier and a downlink carrier.

For RACH example, a non-anchor narrowband internet of things carrier (non-anchor narrowband internet of things carrier, non-anchor NB-IoT carrier) introduced in typical Rel-14, the network device may broadcast narrowband physical random access channel (narrowband physical random access channel, NPRACH) resource information on an anchor carrier (anchor carrier) in narrowband system message block 2 (SIB 2-NB), and Downlink (DL) narrowband internet of things carriers (narrowband internet of things carrier, NB-IoT carrier) corresponding to the Uplink (UL) anchor carrier is a downlink anchor carrier (downlink anchor carrier, DL anchor carrier).

In the NB-IoT system, for frequency division duplexing (frequency division duplex, FDD), the anchor carrier refers to the carrier that the terminal device assumes narrowband primary synchronization signal (narrowband primary synchronization signal, NPSS)/narrowband secondary synchronization signal (narrowband secondary synchronization signal, NSSS)/narrowband physical broadcast channel (narrowband physical broadcast channel, NPBCH)/narrowband system information block (system information block-NB, SIB-NB) transmission, and for time division duplexing (time division duplex, TDD), the anchor carrier refers to the carrier that the terminal device assumes NPSS/NSSS/NPBCH transmission.

In the NB-IoT system, for FDD, the non-anchor carrier refers to the carrier that the terminal device assumes no NPSS/NSSS/NPBCH/SIB-NB transmission, and for TDD, the non-anchor carrier refers to the carrier that the terminal device assumes no NPSS/NSSS/NPBCH transmission.

The network device may broadcast a series of configuration information for non-anchor carriers (non-anchor carriers) in a narrowband system message block 22 (SIB 22-NB), including a series of configuration information for DL non-anchor carriers and UL non-anchor carriers, e.g., NPRACH resources may be configured per coverage class on each UL non-anchor carrier, and for each NPRACH resource may be configured a parameter NPDCCH-carrier index-r14 indicating the corresponding Msg2 of the NPRACH resource, the NPDCCH for scheduling retransmission of Msg3, and downlink carrier identification information for NPDCCH and Msg4 transmissions for scheduling transmission of Msg4, where Msg2 and Msg4 may be carried over NPDSCH.

For each NPRACH resource, a parameter NPDCCH-numrepetition-RA-r 14 may be configured, which is used to indicate the maximum number of repetitions Rmax of the common search space of NPDCCH for scheduling RAR, msg3 retransmissions, msg 4.

The terminal equipment determines a downlink carrier set. A downlink carrier list is configured in the system message (for example, SIB 22-NB), and each entry in the list includes configuration information of a carrier, where the configuration information includes a carrier center frequency point position, a deployment mode, a reference signal power configuration, an effective subframe configuration, a downlink interval configuration, and so on. The downlink carrier may be numbered, such as the index of the first entry in the list is '1', the index of the second entry is '2', and so on. The downstream carrier may then be addressed according to this index.

The set of measurement carriers may be downlink carriers configured for Random Access (RACH) or paging (paging) by a system message. For example, 15 downlink carriers for random access or paging are configured in the system message, and the 15 downlink carriers may be used as a downlink carrier set.

For another example, the downlink carrier set is a downlink carrier configured in the system message and associated with RACH, i.e., NPDCCH for Msg2 and scheduled Msg3 retransmission specified in RACH resource configuration, and NPDCCH and downlink carrier for Msg4 transmissions scheduled Msg4, where Msg2 and Msg4 may be carried over NPDSCH. If 15 downlink carriers for random access or paging are configured in the system message, only 5 downlink carriers are associated with the RACH, and the 5 downlink carriers can be used as a downlink carrier set.

Optionally, the method 200 further comprises:

the terminal equipment determines a first uplink carrier;

the terminal device sends the Msg1 to the network device on the first uplink carrier.

Specifically, the terminal device may select a certain uplink carrier to transmit Msg1 according to a preset probability according to configurations in SIB2-NB and SIB 22-NB.

Optionally, the terminal device determines a first random access channel resource on the first uplink carrier according to the coverage grade;

the terminal device sends Msg1 to the network device on the first random access channel resource.

Specifically, the terminal device needs to select a certain PRACH resource on the first uplink carrier to send the Msg1, the terminal device can determine which PRACH resource of the first uplink carrier is sent with the Msg1 through the coverage level, and determine the downlink carrier corresponding to the selected uplink PRACH resource through the configuration information in the SIB2 or the SIB22, so that the terminal device knows that NPDCCH and Msg2 for scheduling Msg2, NPDCCH for scheduling Msg3 retransmission, and NPDCCH and Msg4 for scheduling Msg4 in the RACH process are all sent on the downlink carrier, wherein the Msg2 and the Msg4 can be carried through the NPDSCH.

The procedure for the terminal device to determine its own coverage level is described as follows:

(1) The terminal device obtains NRSRP of the carrier measured on the terminal device from narrowband reference signals (narrowband reference signal, NRS) sent on the downlink NB-IoT carrier (said NRSRP directly reflecting transmission loss of wireless signals between the network device to the terminal device).

(2) The terminal equipment compares the measured NRSRP with a plurality of NRSRP thresholds (the NRSRP thresholds are issued by a system message), and determines the coverage level according to the comparison result.

The system message in NB-IoT can issue 2 NRSRP thresholds at most, taking two NRSRP thresholds (NRSRP threshold 1,NRSRP threshold 2) as an example, if NRSRP measured by the terminal device is less than NRSRP threshold 2, the terminal device is at coverage level 2 (corresponding to extended coverage); otherwise, if NRSRP value < NRSRP threshold 1 measured by the terminal device, the terminal device is at coverage level 1 (corresponding edge coverage); otherwise, the terminal device is at coverage level 0 (corresponding to normal coverage). The network device may configure different NPRACH resources according to different coverage levels, where the NPRACH resources include a repetition number (which may be 1,2,4,8, 16, 32, 64, 128), a subcarrier number, configuration information of a common search space (common search space for random access response) of NPDCCH for random access response, and the like.

And the terminal equipment obtains a corresponding coverage grade according to the measured NRSRP and the NRSRP threshold value comparison, and sends Msg1 on the NPRACH resource corresponding to the coverage grade. For different coverage levels, the terminal equipment can select different NPRACH power control modes and repetition times to transmit Msg1, so that the receiving performance of the uplink NPRACH receiving is ensured.

S220, the network device sends a random access procedure message two (Msg 2) to the terminal device.

It is to be understood that the random access procedure message two (Msg 2) may also be referred to as a random access response message.

Specifically, after receiving the preamble sent by the terminal device, the network device sends a corresponding Random Access Response (RAR) to the terminal device, which may include time domain and frequency domain information of a random access procedure message three (Msg 3) in S230, a modulation coding mode used for Msg3, a preamble identifier, timing Advance (TA) information, initial uplink grant (UL grant) information, and identification information of the terminal device, where for CBRA, the terminal device receives the RAR, and then determines whether the preamble identifier in the RAR is the same as the preamble sent in S210, if so, the RAR is considered to be successfully received, otherwise, the terminal device considers that the RAR is failed to be received, and the terminal device may re-trigger the RA procedure.

Optionally, before the network device sends Msg2 to the terminal device, the method 200 further includes:

the network device sends downlink control information DCI to the terminal device, where the DCI is used to schedule the Msg2.

The DCI is carried through NPDCCH, and the terminal device needs to monitor an NPDCCH candidate set to obtain scheduling information, where the NPDCCH candidate set is called a search space.

Take the common search space (common search space, CSS) of Type2 listening during RACH as an example, as shown in fig. 5. Type2-CSS occurs periodically, with the period and its starting position within each period indicated in the system message. Specifically, the system message may carry a parameter Rmax, an initial subframe configuration parameter G, and an initial subframe fractional period offset value αoffset, where G is used to adjust the density of the search space, and if the effective duration Rmax of the search space is kept unchanged, the larger the G value, the larger the period g×rmax, and the number of search spaces in a certain period may be reduced.

The period in which Type2-CSS occurs is G x Rmax (ms), the duration within each period is Rmax valid subframes, and the start position is offset backward from the start position of each period by G x Rmax a offset (ms). In one Type2-CSS, there may be a plurality of starting positions of candidates (candidates). The number of repetitions of Candida of Type2-CSS may be an integer value in Rmax, rmax/2, rmax/4 or Rmax/8.

It should be appreciated that the unit of Rmax is the number of active subframes, simply subframes that may be used for NPDCCH and NPDSCH transmissions, because downlink transmissions may have some subframes for transmitting common signals, such as subframes for transmitting NPSS, NSSS, NPBCH, SIB1-NB, or subframes for backward expansion, which may not be used for NPDCCH/NPDSCH transmissions, which would be skipped when encountering these inactive subframes, which also do not participate in the counting of active subframes.

The repetition number R of DCI is indicated by a DCI subframe repetition number field, which is located in DCI. The DCI subframe repetition number field may indicate R by 2 bits as shown in the following table. If the terminal equipment successfully receives the DCI, R is acquired from the repeated number domain of the DCI subframe in the DCI.

S230, the terminal device sends a random access procedure message three (Msg 3) to the network device.

Specifically, the terminal device sends data on a corresponding uplink transmission resource through a physical uplink shared channel (physical uplink shared channel, PUSCH) according to UL grant information indicated in the RAR, and may include RRC message, where identification information of the terminal device, for example, C-RNTI information of the terminal device, a Resume identifier (Resume ID) or an Inactive identifier (I-RNTI) of the terminal device, where the Resume ID or the I-RNTI is allocated to the terminal device by the network device, and the terminal device reports the identifier for the network device to identify the identity of the terminal device and uses such as related configuration information.

For NB-IoT, the identification information of the terminal device may be an SAE temporary mobile subscriber identity (SAE temporary mobile station identifier, S-TMSI), or a random value.

In the NB-IoT system, for a non-data early transmission scenario, the transport block size (transport block size, TBS) of the random access procedure message three is 88 bits, and when the random access procedure message three Msg3 reports the channel quality, the terminal device that does not support updating the RRC message in the random access procedure can report the channel quality by means of MAC CE, that is, can report the channel quality by means of MAC CE of the random access procedure message three. The uplink authorization information of the random access procedure message III is indicated by RAR, the RAR is carried on the random access procedure message II, and the uplink authorization information comprises:

-an uplink subcarrier spacing Δf for indicating a subcarrier spacing of 3.75kHz or 15kHz;

-subcarrier indication field I _sc Indicating the number of sub-carriers and the positions of the sub-carriers;

-a scheduling delay field for determining a delay between the RAR and the random access procedure message three;

-a number of repetitions of a random access procedure message three;

MCS index for indicating modulation scheme of random access procedure message three, number of resource units N _RU ，TBS，

As shown in the table below.

Reporting the channel quality by means of the MAC CE of the random access procedure message three may result in a TBS of the random access procedure message three exceeding 88 bits, i.e. the random access procedure message three may have more than one TBS, such as two, one being 88 bits and one being more than 88 bits. There are two ways how a network device determines a TBS when receiving the random access procedure message three:

mode one: indicating different TBS or different channel quality reporting modes according to random access resource

The network equipment configures different random access resources aiming at different TBSs, different TBSs corresponding to the different random access resources, the terminal equipment selects the random access resources to initiate random access according to the needs, and the network equipment determines TBS of a random access process message III according to the random access resources selected by the terminal equipment; or,

the network equipment configures different random access resources according to different channel quality reporting modes, different channel quality reporting modes corresponding to the different random access resources, the terminal equipment selects the random access resources to initiate random access according to the requirements, and the network equipment determines the reporting mode of the channel quality of the terminal equipment according to the random access resources selected by the terminal equipment. The network device may indicate, in the uplink grant information of the RAR, the modulation mode of the random access procedure message three, the number of resource units, and the TBS in the MCS index field. For new TBSs, i.e. TBSs other than 88 bits, this may be indicated by the reservation status in the MCS, in particular by I _MCS =one or more reservation states of 3,4,5,6, 7.

Mode two: blind detection of different TBS by network device when receiving random access procedure message III

The candidate TBS for the random access procedure message three may be agreed that the candidate TBS includes 88 bits, e.g., two of the agreed candidate TBSs, one 88 bits and the other 104 bits or 120 bits. The terminal equipment selects one TBS from the candidate TBS according to the requirement and sends a random access procedure message III to the network equipment. In order to reduce the complexity of blind detection of the network device, it may be agreed that the number of resource units of the candidate TBSs is the same, or the number of repetitions of the candidate TBSs is the same. When resources of candidate TBS are contractedWhen the number of units is the same, the terminal device can select TBS (TBS) according to random access procedure message three _Msg3 ) The number of repetitions indicated in 88 bits and RAR is N _Rep And determining the repetition number of the random access procedure message three, wherein the determined repetition number is an integer which is greater than or equal to N and is the smallest integer multiple of L.

Wherein N satisfies n=tbs _Msg3 /88·N _Rep "·" represents a multiplication operation. Wherein, the value of L is determined according to the following way: when (when)

L=1, otherwise->

Indicating the number of consecutive subcarriers in the uplink resource unit.

S240, the network device sends a random access procedure message four (Msg 4) to the terminal device.

Specifically, since the terminal device will carry the identification information of the terminal device in S230, the network device will carry the identification information of the terminal device in the collision resolution mechanism through Msg4 in S240 to designate the terminal device that wins in the collision resolution, and other terminal devices that do not wins in the collision resolution will reinitiate the random access.

It can be seen that the coverage level in the current NB-IoT system corresponds to a specific coverage level after comparing the downlink NRSRP measurement with the NRSRP threshold pre-configured by the network device. When the network device sets the NRSRP threshold, the network device should ensure the receiving performance of the uplink NPRACH preamble as much as possible, and the user with smaller NRSRP may select PRACH with high coverage level to repeatedly send the preamble for multiple times.

However, in an actual network deployment, there is a difference between the interference level of the uplink reception of the network device and the interference level of the downlink terminal device. Even for terminal devices of the same NRSRP, there may be a large difference in the signal-to-interference-and-noise ratio (signal to interference plus noise ratio, SINR) of their downlink reception due to the difference in the specific location where they are located. Therefore, the coverage level determined by NRSRP measurement cannot reflect the downlink channel quality and reception performance of the terminal device.

The network device may typically set the NRSRP threshold for coverage class decision in accordance with the uplink PRACH reception performance. The coverage level determined by the terminal device according to the NRSRP threshold can reflect the uplink receiving condition more accurately, but it is difficult to reflect the downlink SINR of the terminal device. Therefore, the network device cannot actually know the downlink coverage situation of the terminal exactly, and generally only can configure the maximum repetition number of the more conservative NPDCCH search space or schedule the downlink data more conservatively, which has a larger loss for the power consumption of the terminal device and the consumption of the system resource.

Fig. 6 is a schematic flowchart of a method 300 for measuring channel quality according to an embodiment of the present application, where, as shown in fig. 6, the method 300 includes:

and S310, the network equipment sends configuration information to the terminal equipment, and the terminal equipment receives the configuration information sent by the network equipment, wherein the configuration information is used for configuring the downlink carrier set.

Optionally, the downlink carrier set includes one or more downlink carriers.

Alternatively, the configuration information is carried in a system message, which may be a SIB22-NB or other system message.

Alternatively, the set of downlink carriers may include downlink carriers for random access channels (random access channel, RACH) or downlink carriers for paging configured in SIB 22-NB.

Alternatively, the downlink carrier set may include a subset of downlink carriers configured in SIB22-NB for random access channel (random access channel, RACH) or downlink carriers for paging, i.e., may include a part of downlink carriers configured in SIB22-NB for RACH or downlink carriers for paging.

Alternatively, the set of downlink carriers may include downlink carriers configured in SIB22-NB that are associated with RACH.

Optionally, the downlink carrier set may include a downlink carrier configured by the network device for measurement.

Alternatively, the downlink carrier set may include anchor (anchor) carriers.

Optionally, the configuration information further includes a maximum number of repetitions Rmax of the common search space for random access on each downlink carrier.

It should be appreciated that since the random access resources (e.g., NPRACH resources) on each downlink carrier correspond to different coverage levels, the maximum number of repetitions Rmax of the common search space for random access on each downlink carrier may have multiple values.

For example, the coverage levels corresponding to different random access resources on a downlink carrier are 3 coverage levels, for example, the maximum number of repetitions of the common search space of the random access resource corresponding to the coverage level 0 is 4, the maximum number of repetitions of the common search space of the random access resource corresponding to the coverage level 1 is 8, and the maximum number of repetitions of the common search space of the random access resource corresponding to the coverage level 2 is 16.

Alternatively, the Rmax may be the maximum number of repetitions of a common search space for NPDCCH scheduling Msg2 and Msg2, NPDCCH scheduling Msg3 retransmissions, NPDCCH scheduling Msg4 and NPDCCH of Msg 4.

S320, the terminal equipment receives first information sent by the network equipment, wherein the first information is used for scheduling a random access procedure message two Msg2, the first information comprises a first parameter, and the first parameter comprises the repetition times of a downlink channel carrying the first information.

It should be appreciated that the first parameter may be R in the method 200 described above.

And S330, the terminal equipment sends the second information and the third information to the network equipment. The network device receives the second information and the third information sent by the terminal device, where the second information includes information for indicating channel quality of a first downlink carrier, the third information is used for indicating that channel quality of the first downlink carrier is related to the first parameter, or the third information is used for indicating that channel quality of the first downlink carrier is related to a second parameter, the second parameter includes a maximum number of repetitions of a common search space on a second downlink carrier for random access, and the downlink carrier set includes the second downlink carrier.

Alternatively, the second information and the third information may be carried in a random access procedure message three Msg 3.

Alternatively, the third information may be sent to the network device before the terminal device sends the Msg 3.

Specifically, the terminal device may send the third information to the terminal device before sending the Msg3, the terminal device may send the second information to the network device, and when the terminal device reports the channel quality again later, the terminal device may only carry the information of the channel quality of the downlink carrier in the Msg 3. The second information may correspond to terminal device capability information.

According to the method for measuring the channel quality, before the Msg3 is sent, the terminal equipment informs the network equipment of the measured channel quality and the first parameter or the second parameter, and the terminal equipment can only carry the information of the channel quality in the Msg3, so that the signaling overhead of the Msg3 can be saved.

Optionally, the first downlink carrier includes one or more downlink carriers.

Optionally, the first downlink carrier includes one or more downlink carriers in the downlink carrier set.

Optionally, the first downlink carrier includes one or more downlink carriers with the best channel quality for the terminal device among the one or more downlink carriers of the downlink carrier set.

Optionally, the first downlink carrier includes one or more downlink carriers indicated by the network device.

Optionally, the first downlink carrier includes one or more downlink carriers determined by the terminal device according to a preset rule.

Alternatively, the second information/third information may be reserved bits or reserved state or idle bits, or idle state indication, or MAC CE indication by RRC signaling.

Optionally, the third information is used to indicate that the channel quality of the first downlink carrier is related to the first parameter.

Optionally, the third information is used to indicate that the channel quality of the first downlink carrier is related to R.

It should be understood that the channel quality of the first downlink carrier is related to R may also be understood that the channel quality of the first downlink carrier reported by the terminal device is related to the number of repetitions R of NPDCCH for scheduling Msg 2.

For example, the terminal device may report the channel quality in Msg3 by using RRC signaling or idle bits of the MAC CE, where the reported channel quality may be k×r, where the value of K may be 1/4,1,4, or the value of K may be 1/8,1,8, or the value of K may be 1/4,1,8, or the value of K may be 1/8,1,4.

For another example, the terminal device may report the channel quality by using RRC signaling or idle bits of the MAC CE in Msg3, where the reported channel quality may be k×r, where the maximum value of k×r is R and the minimum value is 1.

The table may also be used, where the terminal device reports an index in Msg3, that is, reports one of { noneaseurements, candidatrep-1, candidatrep-2, candidatrep-3 }, and the mapping relationship between the reported NPDCCH repetition level and reporting amount is as follows:

reporting value	NPDCCH repetition level
		noMeasurements	Non-measurement reporting
candidateRep-1	R/4(Note1)
		candidateRep-2	R
candidateRep-3	4R(Note2)

Wherein, note1: when R is less than 4, candida ateRep-1 is set to 1;

note2: when R is greater than 512, candida terreRep-3 is set to 2048.

The NPDCCH repetition level corresponding to the reported value Candida teRep-1 in the above table can also be R/8 or 1.

The NPDCCH repetition level corresponding to the reported value candidatrep-3 in the above table may also be 8R or R.

It should be understood that the above table is only an example, and the order of the reported values in the above table is not limited in any way in the embodiments of the present application.

In another example, the table may be used, and the terminal device reports an index in Msg3, that is, reports one of { noneasements, candidatrep-1, candidatrep-2, candidatrep-3 }, and the mapping relationship between the reported NPDCCH repetition level and reporting amount is as follows:

It should be understood that in the embodiment of the present application, the reported NPDCCH repetition level may reflect the channel quality of the downlink carrier.

Optionally, the third information is used to indicate that the channel quality of the first downlink carrier is related to the second parameter.

Optionally, the second parameter is Rmax.

It should be appreciated that Rmax has been described in the method 200, and is not described here again for brevity.

For example, the terminal device may report the channel quality in Msg3 by using RRC signaling or idle bits of the MAC CE, where the reported channel quality may be k×rmax, where the value of K may be 1/4,1,4, or the value of K may be 1/8,1,8, or the value of K may be 1/4,1,8, or the value of K may be 1/8,1,4.

For another example, the terminal device may report the channel quality by using RRC signaling or idle bits of the MAC CE in Msg3, where the reported channel quality may be k×rmax, where the maximum value of k×rmax is Rmax and the minimum value is 1. The table may also be used, where the terminal device reports an index in Msg3, that is, reports one of { noneaseurements, candidatrep-1, candidatrep-2, candidatrep-3 }, and the mapping relationship between the reported NPDCCH repetition level and reporting amount is as follows:

Reporting value	NPDCCH repetition level
		noMeasurements	Non-measurement reporting
candidateRep-1	Rmax/4(Note1)
		candidateRep-2	Rmax
candidateRep-3	4Rmax(Note2)

Wherein, note1: when Rmax is less than 4, candida ateRep-1 is set to 1;

note2: when Rmax is greater than 512, candida ateRep-3 is set to 2048.

The NPDCCH repetition level corresponding to the reported value Candida teRep-1 in the above table can also be Rmax/8 or 1.

The NPDCCH repetition level corresponding to the reported value candidatrep-3 in the above table may also be 8Rmax or Rmax.

It should be understood that the above table is only an example, and the order of the reported values in the above table is not limited in any way in the embodiments of the present application.

In another example, the table may be used, and the terminal device reports an index in Msg3, that is, reports one of { noneasements, candidatrep-1, candidatrep-2, candidatrep-3 }, and the mapping relationship between the reported NPDCCH repetition level and reporting amount is as follows:

alternatively, the second information and the third information may be indicated jointly, wherein one status indicates that no measurement has been reported. The mapping relation between the reported NPDCCH repetition level and the reported amount is shown in the following table.

Reporting value	NPDCCH repetition level
		noMeasurements	Non-measurement reporting
candidateRep-1	Rmax/4(Note1)
		candidateRep-2	Rmax
candidateRep-3	4Rmax(Note2)
		candidateRep-4	R/4(Note3)
candidateRep-5	R
		candidateRep-6	4R(Note4)

Wherein, note1: when Rmax is less than 4, candida ateRep-1 is set to 1;

note2: when Rmax is greater than 512, candida ateRep-3 is set to 2048.

Note3 when R is less than 4, candida Rep-1 is set to 1;

note4: when R is greater than 512, candida terreRep-3 is set to 2048.

The NPDCCH repetition level corresponding to the reported value Candida teRep-1 in the above table can also be Rmax/8 or 1.

The NPDCCH repetition level corresponding to the reported value candidatrep-3 in the above table may also be 8Rmax or Rmax.

The NPDCCH repetition level corresponding to the reported value candidatrep-4 in the above table may also be R/8 or 1.

The NPDCCH repetition level corresponding to the reported value candidatrep-6 in the above table may also be 8R or R.

It should be understood that the above table is only an example, and the order of the reported values in the above table is not limited in any way in the embodiments of the present application.

It should be understood that, in the embodiment of the present application, the channel quality may be reported by using RRC signaling or idle bits of MAC CE, or may be reported by reporting an index, or may be reported by other means, which is not limited thereto.

Optionally, the first downlink carrier includes a downlink carrier carrying the random access procedure message two.

Specifically, the terminal device may measure the channel quality of the downlink carrier carrying the Msg2, and carry the channel quality of the downlink carrier carrying the Msg2 in the Msg 3.

Optionally, the second downlink carrier is a downlink carrier carrying the random access procedure message two.

Specifically, the second parameter may be a maximum number of repetitions of a common search space for random access on a downlink carrier carrying Msg 2.

For example, the third information indicates that the channel quality of the first downlink carrier is related to the second parameter, the terminal device may report the channel quality of the downlink carrier carrying Msg2 in Msg3, the terminal device determines that the second parameter Rmax is 8, the terminal device determines, by measuring the channel quality of the downlink carrier carrying Msg2, that the number of repetitions required for the NPDCCH to reach the preset block error rate according to the preset transmission parameter is 7, and the terminal device needs to select the minimum number of repetitions required for the NPDCCH to reach the preset block error rate according to the preset transmission parameter when reporting. For example, the optional value of reporting the NPDCCH repetition level is k×rmax, k=1/8, 1 or 4, i.e. the optional value of reporting the NPDCCH repetition level is 1,8, 32. According to the measurement result, the number of repetitions required by the NPDCCH to reach the preset block error rate according to the preset transmission parameter is 7, the NPDCCH repetition level reported by the terminal device is 1, the NPDCCH repetition levels reported by the terminal device are 8 and 32, so as to meet the preset error rate requirement, therefore, the terminal device determines that the minimum number of repetitions required by the NPDCCH to reach the preset block error rate according to the preset transmission parameter is 8, and the terminal device can indicate that the channel quality is 8 (i.e. k=1) in the idle bit of the RRC signaling or MAC CE, or the terminal device can report an index "candidateRep-2", and the network device can determine that the reported NPDCCH repetition number is 8. The preset transmission parameters are shown in the following table, and the preset block error rate may be 1%.

In the embodiment of the application, the terminal equipment reports the channel quality of the downlink carrier where the Msg2 is located in the Msg3, which is helpful for optimizing the resource allocation of the NPDCCH for scheduling the retransmission of the Msg3 and the NPDCCH and the NPDSCH of the Msg4, thereby improving the downlink resource efficiency.

The channel quality reported by the terminal equipment is related to the first parameter or the second parameter, the mode of reporting the channel quality by the terminal equipment is more flexible, the terminal equipment with different capacities can be compatible, and meanwhile, the terminal equipment can select to report a value which is close to the channel quality obtained by actual measurement, so that the cost of reporting the channel quality by the terminal equipment can be saved.

Optionally, the first downlink carrier includes a third downlink carrier.

Optionally, the third downlink carrier is a downlink carrier with the best channel quality in one or more carriers, where the one or more carriers are determined by the terminal device from the downlink carrier set.

Optionally, the method 300 further includes:

the terminal equipment determines one or more carriers from the downlink carrier set;

the terminal device measures the channel quality of each of the one or more downlink carriers;

the terminal equipment determines the first downlink carrier according to the channel quality of each downlink carrier.

Optionally, the first downlink carrier is one or more downlink carriers with the best channel quality among the one or more downlink carriers.

It should be appreciated that in the embodiments of the present application, the one or more downlink carriers may be a complete set of the downlink carrier set, or may be a subset of the downlink carrier set.

Optionally, the third downlink carrier is determined by the terminal device according to a preset rule.

Optionally, the method further comprises:

the terminal equipment determines a first downlink carrier according to a preset rule.

Optionally, before the terminal device determines the first downlink carrier according to the preset rule, the method 300 further includes:

the terminal device determines one or more downlink carriers from the set of downlink carriers.

For example, the downlink carrier set may be a downlink carrier configured by a system message for random access or paging, in which 15 downlink carriers for random access or paging are configured, and the terminal device may determine the 15 downlink carriers as the one or more downlink carriers.

For another example, the downlink carrier set is a downlink carrier associated with the RACH configured in a system message, 15 downlink carriers for random access or paging are configured in the system message, only 5 downlink carriers are associated with the RACH, and the terminal device may determine the 5 downlink carriers as the one or more downlink carriers.

The terminal device determines a first downlink carrier according to a preset rule, including:

the terminal equipment determines a first downlink carrier from the one or more downlink carriers according to a preset rule.

Optionally, the terminal device may use a paging carrier among the one or more downlink carriers as the downlink measurement carrier.

The paging carrier is the smallest index n satisfying the following,

floor(UE_ID/(N*Ns))mod W<W(0)+W(1)+…+W(n)。

where ue_id=imsi mod 4096 or ue_id=imsi mod 16384, w (N) is the weight of carrier N, n=min (T, nB), ns=max (1, nB/T), where T and nB are configured by the network device. The IMSI is a set of decimal number sequences, and can be used as an identifier of a terminal device.

Optionally, the terminal device may determine the first downlink carrier according to the identification information of the terminal device.

For example, the terminal device may take a modulus according to an identifier (IMSI) of the terminal device and a value, obtain an index of a downlink carrier, and then determine, from the downlink carrier set, a downlink carrier corresponding to the downlink carrier index, where the value is a preset value, may be less than or equal to the number of carriers in the downlink carrier set, or the value is the number of carriers in the downlink carrier set.

For another example, the one or more downlink carriers include 5 downlink carriers, the index of the carrier is 0-4 according to a certain sequence, the terminal device obtains the index of the carrier by taking the modulus of the IMSI and M, and then the terminal device determines the carrier with the index of "4" in the one or more downlink carriers as the first downlink carrier.

Optionally, the terminal device may determine the downlink measurement carrier according to the random access resource location, for example, there is a mapping relationship between the random access resource location and the downlink measurement carrier, where the mapping relationship is as follows:

mode 1: each uplink carrier for each random access is mapped with a downlink measurement carrier, and the terminal device determines the uplink carrier for transmitting the Msg1, thereby determining the first downlink carrier.

Mode 2: and mapping a downlink measurement carrier to each random access resource of each uplink carrier for random access, wherein the terminal equipment can determine the first downlink carrier by determining the random access resource for transmitting Msg 1.

Mode 3: and mapping a downlink measurement carrier to each subcarrier of each random access resource of each uplink carrier for random access, wherein the terminal equipment can determine the first downlink carrier by determining the subcarrier for transmitting Msg 1.

Optionally, the third downlink carrier is indicated by the network device.

Optionally, before the terminal device sends the random access procedure message three Msg3 to the network device, the method 300 further includes:

the network device sends fourth information to the terminal device, the terminal device receives the fourth information sent by the network device, and the fourth information is used for indicating the first downlink carrier.

Optionally, the fourth information is Msg2.

Optionally, the fourth information is downlink control information DCI.

Optionally, the DCI is DCI corresponding to NPDCCH order, where the DCI is used for a random access procedure triggered by the NPDCCH order.

In this embodiment of the present application, DCI corresponding to the NPDCCH order may be used to instruct a terminal device to send one or more of a position, a subcarrier position, or a repetition number of an uplink carrier of Msg 1.

Optionally, the DCI corresponding to the NPDCCH order may be further used to indicate one or more downlink carriers, and after receiving the DCI, the terminal device may measure the one or more downlink carriers indicated by the DCI corresponding to the NPDCCH order.

It should be understood that, in the embodiment of the present application, for the NB-IoT system, the DCI corresponding to the NPDCCH order may be the DCI format N1, and the idle bit or the reserved bit in the DCI format N1 may be used to indicate the third downlink carrier.

Optionally, the fourth information is a system message, and the fourth message is SIB2-NB or SIB22-NB, or SIB2-NB and SIB22-NB. Specific indication modes of the fourth information can be as follows:

mode 1: the network device may indicate a third downlink carrier for each uplink carrier for random access, and the terminal device may determine the third downlink carrier by determining the uplink carrier for transmitting Msg 1.

Mode 2: the network device may indicate the third downlink carrier for each random access resource of each uplink carrier for random access, and the terminal device may determine the third downlink carrier by determining the random access resource for transmitting Msg 1.

Mode 3: the network device may also indicate a third downlink carrier for each subcarrier of each random access resource of each uplink carrier for random access, and the terminal device may determine the third downlink carrier by determining the subcarrier that transmits Msg 1.

It should be understood that the third downlink carrier may be determined in the above several manners, or may be determined in other manners, which is not limited in any way by the embodiments of the present application.

Optionally, the second downlink carrier is the third carrier.

Optionally, in the embodiment of the present application, if the terminal device only reports the channel quality of the downlink carrier carrying the Msg2 in the Msg3, the third information may indicate that the channel quality of the downlink carrier carrying the Msg2 is related to the maximum repetition number of the public search space used for random access on the downlink carrier carrying the Msg2, or the third information may indicate that the channel quality of the downlink carrier carrying the Msg2 is related to the repetition number of the downlink channel carrying the first information.

Optionally, in the embodiment of the present application, if the terminal device only reports the channel quality of the third downlink carrier in Msg3, the third information may indicate that the channel quality of the third downlink carrier is related to the maximum repetition number of the common search space on the third downlink carrier, or the third information may indicate that the channel quality of the third downlink carrier is related to the repetition number of the downlink channel carrying the first information.

Optionally, in the embodiment of the present application, if the terminal device reports, in Msg3, channel qualities of a downlink carrier carrying Msg2 and a third downlink carrier, the third information may indicate that the channel qualities of the downlink carrier carrying Msg2 and the third downlink carrier are related to the maximum repetition number of the common search space on the third downlink carrier; or, the third information may indicate that the channel quality of the downlink carrier carrying Msg2 and the third downlink carrier is related to the maximum number of repetitions of the common search space on the downlink carrier carrying Msg 2; alternatively, the third information may indicate that the channel quality of the downlink carrier carrying Msg2 and the third downlink carrier is related to the number of repetitions of the downlink channel carrying the first information.

Optionally, the second downlink carrier is the third carrier, and the second parameter includes a maximum value or a minimum value of a maximum number of repetitions of a common search space for random access on the second downlink carrier.

As can be seen from the description of the method 200, for each downlink carrier having different random access resources, the terminal device may determine the appropriate random access resource according to the coverage level, for example, for a third downlink carrier having multiple random access resources, for example, three coverage levels, where the maximum number of repetitions of the common search space of the random access resources corresponding to the coverage level 0, the coverage level 1 and the coverage level 2 is 2,4 and 8, respectively, and when the third information is used to indicate that the channel quality of the third downlink carrier is related to the second parameter, the second parameter may take the maximum value 8 or the minimum value 2 of the maximum number of repetitions.

It should be understood that the selection of the maximum value or the minimum value may be pre-agreed by the terminal device and the network device, or may be performed in other manners, which are not limited in the embodiments of the present application.

It should also be understood that the second parameter may be the maximum value or the minimum value of the multiple repetition times, or may be other values, and the embodiments of the present application are not limited thereto.

According to the method for measuring the channel quality, the terminal equipment reports the channel quality of the downlink carrier wave through the Msg3, the network equipment determines the load condition of each carrier wave according to the channel quality reported by all the terminal equipment, for example, according to statistical data, the carrier wave with better downlink channel quality is lighter in load, the carrier wave with worse downlink channel quality is heavier in load, and the network equipment is facilitated to realize load balancing, for example, partial service of the carrier wave with heavier load is distributed to the carrier wave with lighter load.

In the embodiment of the application, the manner of reporting the channel quality by the terminal equipment is more flexible, and the terminal equipment can be compatible with terminal equipment with different capabilities, if any terminal equipment does not support to modify the RRC message in the Msg3 in the random access process, the terminal equipment of the type can select to report through Rmax, and if some terminal equipment supports to modify the RRC message in the Msg3 in the random access process, the terminal equipment of the type can select to report through R (because R needs to be acquired in the random access process).

In particular, for terminal equipment supporting modification of RRC messages in Msg3 during random access, reporting channel quality through R is finer, and reporting channel quality is more accurate.

Fig. 7 is a schematic flowchart of a method 400 for measuring channel quality according to an embodiment of the present application, where, as shown in fig. 7, the method 400 includes:

s410, the network device sends configuration information to the terminal device, the terminal device receives the configuration information sent by the network device, and the configuration information is used for configuring the downlink carrier set.

Optionally, the configuration information is carried in a system message.

Optionally, the system message is a SIB22-NB or other system message.

Optionally, the system message includes SIB2-NB and SIB22-NB.

Specifically, the terminal device may select, according to configurations in SIB2 and SIB22, a certain uplink carrier to send an uplink PRACH according to a preset probability, determine a corresponding coverage level by comparing NRSRP and NRSRP thresholds, determine, from determining which NPRACH resource of the uplink carrier to send Msg1, determine, through configuration information in SIB2 or SIB22, a downlink carrier corresponding to the selected uplink PRACH resource, and learn an Rmax corresponding to NPDCCH common search space. The NPDCCH and NPDSCH of Msg2, and NPDCCH and NPDSCH of Msg4, which schedule retransmission of Msg3, of the terminal device in the random access procedure are both transmitted on the downlink carrier. And, the terminal device may also determine a maximum number of repetitions Rmax of the common search space for random access on each downlink carrier.

S420, the terminal device sends a random access procedure message (Msg 1) to the network device, and the network device receives the Msg1 sent by the terminal device.

S430, the network device sends DCI to the terminal device, where the DCI is used to schedule a random access procedure message two Msg2.

Specifically, after the terminal device sends the Msg1, then monitors the public search space of the type2-PDCCH in a random access response window (RAR window) of the corresponding downlink carrier, if the NPDCCH masked by the corresponding RA-RNTI is detected, the terminal device reads the corresponding NPDSCH, analyzes whether the Msg2 therein contains the corresponding random access preamble identifier (random access preamble ID, RAPID), and if the corresponding RAPID exists, the terminal device processes the corresponding RAR and determines the transmission resource and the transmission time of the Msg 3. In this process, the terminal device may obtain the actual transmission repetition number R of the corresponding NPDCCH by reading DCI information for scheduling the NPDSCH carried by the NPDCCH channel.

S440, the network device sends Msg2 to the terminal device, and the terminal device receives the Msg2 sent by the network device.

Optionally, the method further comprises:

the terminal equipment measures the channel quality of the downlink carrier wave carrying the Msg 2; and/or

The terminal device measures channel quality of the third downlink carrier.

It should be appreciated that the determination process of the third downlink carrier has been described in the method 300, and is not described herein for brevity.

S450, the terminal equipment sends a random access procedure message three Msg3 to the network equipment, and the network equipment receives the Msg3 sent by the terminal equipment.

Optionally, the terminal device sends the third information to the network device before sending Msg3.

Optionally, the terminal device carries the second information and the third information in the Msg3.

It should be appreciated that the manner in which the terminal device specifically reports the second information and the third information has been described in the method 300, and for brevity, will not be described in detail herein.

S460, the network equipment determines the channel quality of the first downlink carrier wave reported by the terminal equipment according to the Msg3.

And S470, the network equipment transmits the Msg4 to the terminal equipment, and the terminal equipment receives the Msg4 transmitted by the network equipment.

The method for measuring channel quality provided by the implementation of the present application is described in detail above with reference to fig. 6 and 7. The following describes in detail the apparatus for measuring channel quality according to the embodiments of the present application with reference to the accompanying drawings.

The embodiment of the application also provides a device for realizing any one of the above methods. For example, there is provided an apparatus comprising means for implementing the steps performed by the terminal in any of the above methods. As another example, another apparatus is provided that includes means for performing the steps performed by the network device in any of the methods above.

Fig. 8 shows a schematic block diagram of an apparatus 500 for measuring channel quality according to an embodiment of the present application, and as shown in fig. 8, the apparatus 500 for measuring channel quality may include a transceiver unit 510 and a processing unit 520.

In one possible design, the device for measuring channel quality may be a terminal device or a chip configured in the terminal device in the methods 300 and 400 described above.

Specifically, the transceiver unit 510 is configured to receive configuration information sent by a network device, where the configuration information is used to configure a downlink carrier set;

a processing unit 520 for determining the configuration information;

the transceiver unit 510 is further configured to receive first information sent by the network device, where the first information is used to schedule a random access procedure message two Msg2, the first information includes a first parameter, and the first parameter includes a repetition number of a downlink channel carrying the first information;

The processing unit 520 is further configured to determine the first parameter;

the transceiver unit 510 is further configured to send second information and third information to the network device, where the second information includes information for indicating a channel quality of a first downlink carrier, the third information is used to indicate that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used to indicate that the channel quality of the first downlink carrier is related to a second parameter, the second parameter includes a maximum number of repetitions of a common search space on a second downlink carrier for random access, and the downlink carrier set includes the second downlink carrier.

Optionally, the first downlink carrier includes a downlink carrier carrying the Msg 2.

Optionally, the second downlink carrier is a downlink carrier carrying the Msg 2.

Optionally, the first downlink carrier comprises a third downlink carrier, wherein,

the third downlink carrier is the downlink carrier with the best channel quality in one or more carriers, and the one or more carriers are determined from the downlink carrier set by the terminal equipment; or,

the third downlink carrier is determined by the terminal equipment according to a preset rule; or,

the third downlink carrier is indicated by the network device.

Optionally, the second downlink carrier is the third carrier, or the second downlink carrier is a downlink carrier carrying the Msg 2.

Optionally, the second downlink carrier is the third carrier, and the second parameter includes a maximum value or a minimum value of a maximum number of repetitions of a common search space for random access on the second downlink carrier.

Optionally, the transceiver unit 510 is specifically configured to:

transmitting the third information to the network device before transmitting a random access procedure message three Msg3 to the network device;

the Msg3 is sent to the network device, the Msg3 including the second information.

It is understood that the apparatus 500 for measuring channel quality may correspond to the terminal device in the method 300 and the method 400 for measuring channel quality according to the embodiments of the present application, and the apparatus 500 for measuring channel quality may include units for performing the methods 300 and the terminal device in the method 400 for measuring channel quality. And, each unit in the apparatus 500 for measuring channel quality and the other operations and/or functions described above are respectively for implementing the corresponding flows of the methods 300 and 400 for measuring channel quality. For details of the execution of the above corresponding steps by each unit, refer to the foregoing description of the method embodiment in conjunction with fig. 6 and fig. 7, and for brevity, no further description is given here.

Fig. 9 shows a schematic block diagram of an apparatus 600 for measuring channel quality according to an embodiment of the present application, and as shown in fig. 9, the apparatus 600 for measuring channel quality may include a processing unit 610 and a transceiving unit 620.

In one possible design, the apparatus for measuring channel quality may be a network device or a chip configured in the network device in the methods 300 and 400 described above.

A processing unit 610, configured to determine configuration information, where the configuration information is used to configure a downlink carrier set;

a transceiver unit 620, configured to send the configuration information to a terminal device;

the processing unit 610 is further configured to determine first information, where the first information is used to schedule a random access procedure message two Msg2, the first information includes a first parameter, and the first parameter includes a repetition number of a downlink channel carrying the first information;

the transceiver unit 620 is further configured to send the first information to the terminal device;

the transceiver unit 620 is further configured to receive the second information and third information, where the second information includes information for indicating a channel quality of the first downlink carrier, and the third information is used to indicate that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used to indicate that the channel quality of the first downlink carrier is related to a second parameter, where the second parameter includes a maximum number of repetitions of a common search space on a second downlink carrier for random access, and the downlink carrier set includes the second downlink carrier.

Optionally, the first downlink carrier includes a downlink carrier carrying the Msg 2.

Optionally, the second downlink carrier is a downlink carrier carrying the Msg 2.

Optionally, the first downlink carrier comprises a third downlink carrier, wherein,

the third downlink carrier is the downlink carrier with the best channel quality in one or more carriers, and the one or more carriers are determined from the downlink carrier set by the terminal equipment; or,

the third downlink carrier is determined by the terminal equipment according to a preset rule; or,

the third downlink carrier is indicated by the network device.

Optionally, the second downlink carrier is the third carrier, or the second downlink carrier is a downlink carrier carrying the Msg 2.

Optionally, the second downlink carrier is the third carrier, and the second parameter includes a maximum value or a minimum value of a maximum number of repetitions of a common search space for random access on the second downlink carrier.

It should be understood that the apparatus 600 for measuring channel quality may correspond to the network device in the method 300 and the method 400 for measuring channel quality according to the embodiments of the present application, and the apparatus 600 for measuring channel quality may include units for performing the methods performed by the network device of the method 300 and the method 400 for measuring channel quality. And, each unit in the apparatus 600 for measuring channel quality and the other operations and/or functions described above are respectively for implementing the corresponding flows of the methods 300 and 400 for measuring channel quality. For details of the execution of the above corresponding steps by each unit, refer to the foregoing description of the method embodiment in conjunction with fig. 6 and fig. 7, and for brevity, no further description is given here.

Fig. 10 shows a schematic structural diagram of a terminal device provided in an embodiment of the present application, which may be the terminal device in the above embodiment, for implementing the operation of the terminal device in the above embodiment. As shown in fig. 10, the terminal device includes: antenna 710, radio frequency device 720, baseband device 730. The antenna 710 is connected to a radio frequency device 720. In the downlink direction, the radio frequency device 720 receives information sent by the network device through the antenna 710, and sends the information sent by the network device to the baseband device 730 for processing. In the uplink direction, the baseband device 730 processes information of the terminal, and sends the processed information to the radio frequency device 720, and the radio frequency device 720 processes information of the terminal device and sends the processed information to the network device through the antenna 710.

Baseband apparatus 730 may include a modem subsystem for implementing processing of the various communication protocol layers of data; the system also comprises a central processing subsystem for realizing the processing of the terminal operating system and the application layer; in addition, other subsystems, such as a multimedia subsystem for implementing control of a terminal device camera, screen display, etc., a peripheral subsystem for implementing connection with other devices, etc., may be included. The modem subsystem may be a separately provided chip. Alternatively, the above means for the terminal may be located in the modem subsystem.

The modem subsystem may include one or more processing elements 731, including, for example, a host CPU and other integrated circuits. In addition, the modulation and demodulation subsystem may also include a storage element 732 and an interface circuit 733. The storage element 732 is used to store data and programs, but the programs used to perform the methods performed by the terminal in the above methods may not be stored in the storage element 732, but in a memory external to the modulation and demodulation subsystem, which is loaded for use when in use. The interface circuit 733 is used to communicate with other subsystems. The above means for the terminal may be located in a modem subsystem which may be implemented by a chip comprising at least one processing element for performing the steps of any of the methods performed by the above terminal device and interface circuitry for communicating with other means. In one implementation, the unit of the terminal device implementing each step in the above method may be implemented in the form of a processing element scheduler, for example, the apparatus for a terminal device includes a processing element and a storage element, and the processing element invokes the program stored in the storage element to perform the method performed by the terminal device in the above method embodiment. The memory element may be a memory element where the processing element is on the same chip, i.e. an on-chip memory element.

In another implementation, the program for executing the method executed by the terminal device in the above method may be a storage element on a different chip than the processing element, i.e. an off-chip storage element. At this time, the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal in the above method embodiment.

In yet another implementation, the unit of the terminal implementing each step in the above method may be configured as one or more processing elements, which are disposed on the modem subsystem, where the processing elements may be integrated circuits, for example: one or more application specific integrated circuits (application specific integrated circuit, ASIC), or one or more digital signal processors (digital signal processor, DSP), or one or more off-the-shelf programmable gate arrays (field programmable gate array, FPGA), or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the terminal implementing the steps of the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC) chip for implementing the above method. At least one processing element and a storage element can be integrated in the chip, and the processing element invokes the stored program of the storage element to implement the method executed by the terminal; alternatively, at least one integrated circuit may be integrated within the chip for implementing the method performed by the above terminal; alternatively, the functions of the partial units may be implemented in the form of a processing element calling program, and the functions of the partial units may be implemented in the form of an integrated circuit, in combination with the above implementations.

It will be seen that the above apparatus for a terminal device may comprise at least one processing element and interface circuitry, wherein the at least one processing element is adapted to perform any of the methods performed by the terminal device provided by the above method embodiments. The processing element may be configured in a first manner: that is, a part or all of the steps executed by the terminal are executed in a mode of calling the program stored in the storage element; the second way is also possible: i.e. by means of integrated logic circuitry of hardware in the processor element in combination with instructions to perform part or all of the steps performed by the terminal device; of course, it is also possible to perform part or all of the steps performed by the terminal in combination with the first and second modes.

The processing element herein, as described above, may be a general purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above methods, such as: one or more ASICs, or one or more microprocessor DSPs, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.

The memory element may be one memory or may be a collective term for a plurality of memory elements.

Fig. 11 is a schematic structural diagram of a network device provided in an embodiment of the present application, which may be the network device in the foregoing embodiment, for implementing the operation of the network device in the foregoing embodiment. As shown in fig. 11, the network device includes: an antenna 801, a radio frequency device 802, and a baseband device 803. The antenna 801 is connected to a radio frequency device 802. In the uplink direction, the radio frequency device 802 receives information transmitted from the terminal device via the antenna 801, and transmits the information transmitted from the terminal device to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes information of the terminal and sends the processed information to the radio frequency device 802, and the radio frequency device 802 processes information of the terminal equipment and sends the processed information to the terminal through the antenna 801.

The baseband apparatus 803 may include one or more processing elements 8031, including, for example, a master CPU and other integrated circuits. In addition, the baseband device 803 may further include a storage element 8032 and an interface 8033, the storage element 8032 being used for storing programs and data; the interface 8033 is used to interact with the radio frequency device 802, for example, a common public radio interface (common public radio interface, CPRI). The above means for network device may be located in the baseband means 803, e.g. the above means for network device may be a chip on the baseband means 803 comprising at least one processing element for performing the steps of any one of the methods performed by the above network device and interface circuitry for communicating with other means. In one implementation, the units of the network device implementing the steps in the above method may be implemented in the form of a processing element scheduler, for example, an apparatus for a network device includes a processing element and a storage element, where the processing element invokes the program stored in the storage element to perform the method performed by the network device in the above method embodiment. The memory elements may be memory elements on the same chip as the processing elements, i.e., on-chip memory elements, or may be memory elements on a different chip than the processing elements, i.e., off-chip memory elements.

In another implementation, the units of the network device implementing the steps of the above method may be configured as one or more processing elements, which are disposed on the baseband apparatus, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the network device implementing the steps of the above method may be integrated together and implemented in the form of an SOC, e.g. the baseband device comprises the SOC chip for implementing the above method. At least one processing element and a storage element can be integrated in the chip, and the processing element invokes the stored program of the storage element to implement the method executed by the above network device; alternatively, at least one integrated circuit may be integrated within the chip for implementing the method performed by the above network device; alternatively, the functions of the partial units may be implemented in the form of a processing element calling program, and the functions of the partial units may be implemented in the form of an integrated circuit, in combination with the above implementations.

It will be seen that the above apparatus for a network device may comprise at least one processing element and interface circuitry, wherein the at least one processing element is adapted to perform any of the methods performed by the network device provided by the above method embodiments. The processing element may be configured in a first manner: that is, a part or all of the steps executed by the network device are executed in a manner of calling the program stored in the storage element; the second way is also possible: i.e. by means of integrated logic circuitry of hardware in the processor element in combination with instructions to perform part or all of the steps performed by the network device; of course, some or all of the steps performed by the above network device may also be performed in combination with the first and second modes.

The terminal device and the network device in the above-described respective apparatus embodiments may correspond completely to the terminal device or the network device in the method embodiments, and the respective steps are performed by respective modules or units, for example, when the apparatus is implemented in a chip, the receiving unit may be an interface circuit of the chip for receiving signals from other chips or apparatuses. The above unit for transmitting is an interface circuit of the device for transmitting signals to other devices, for example, when the device is implemented in the form of a chip, the transmitting unit is an interface circuit of the chip for transmitting signals to other chips or devices.

The embodiment of the application also provides a communication system, which comprises: the terminal device and/or the network device.

According to the method provided by the embodiment of the application, the application further provides a computer program product, which comprises: computer program code which, when run on a computer, causes the computer to perform the method in the above-described embodiments.

According to the method provided in the embodiments of the present application, there is also provided a computer readable medium storing a program code which, when run on a computer, causes the computer to perform the method in the embodiments 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 solution. 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 application.

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

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (26)

1. A method of measuring channel quality, comprising:

the method comprises the steps that terminal equipment receives configuration information sent by network equipment, wherein the configuration information is used for configuring a downlink carrier set;

the terminal equipment receives first information sent by the network equipment, wherein the first information is used for scheduling a random access process message two Msg2, the first information comprises a first parameter, and the first parameter comprises the repetition number of a downlink channel carrying the first information;

the terminal device sends second information and third information to the network device, where the second information includes information for indicating channel quality of a first downlink carrier, the first downlink carrier includes a third downlink carrier, the third downlink carrier is a downlink carrier with the best channel quality in one or more carriers, the one or more carriers are determined by the terminal device from the downlink carrier set, the third information is used for indicating that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used for indicating that the channel quality of the first downlink carrier is related to the second parameter, and the second parameter includes a maximum repetition number of a public search space for random access on a second downlink carrier, where the downlink carrier set includes the second downlink carrier.

2. The method of claim 1, wherein the first downlink carrier comprises a downlink carrier carrying the Msg 2.

3. The method of claim 1, wherein the second downlink carrier is a downlink carrier carrying the Msg 2.

4. The method of claim 1, wherein the second downlink carrier is the third downlink carrier.

5. The method of claim 4, wherein the second downlink carrier is the third downlink carrier, and the second parameter comprises a maximum or a minimum of a maximum number of repetitions of a common search space on the second downlink carrier for random access.

6. The method according to any of claims 1 to 5, wherein the terminal device sends second information and third information to the network device, comprising:

the terminal equipment sends the third information to the network equipment before sending a random access procedure message three Msg3 to the network equipment;

and the terminal equipment sends the Msg3 to the network equipment, wherein the Msg3 comprises the second information.

7. A method of measuring channel quality, comprising:

The network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for configuring a downlink carrier set;

the network equipment sends first information to the terminal equipment, wherein the first information is used for scheduling a random access process message two Msg2, the first information comprises a first parameter, and the first parameter comprises the repetition number of a downlink channel carrying the first information;

the network device receives second information and third information from the terminal device, where the second information includes information for indicating channel quality of a first downlink carrier, the first downlink carrier includes a third downlink carrier, the third downlink carrier is a downlink carrier with the best channel quality in one or more carriers, the one or more carriers are determined by the terminal device from the downlink carrier set, the third information is used for indicating that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used for indicating that the channel quality of the first downlink carrier is related to the second parameter, and the second parameter includes a maximum repetition number of a public search space for random access on a second downlink carrier, where the downlink carrier set includes the second downlink carrier.

8. The method of claim 7, wherein the first downlink carrier comprises a downlink carrier carrying the Msg 2.

9. The method according to claim 7 or 8, wherein the second downlink carrier is a downlink carrier carrying the Msg 2.

10. The method of claim 7, wherein the second downlink carrier is the third downlink carrier.

11. The method of claim 10, wherein the second downlink carrier is the third downlink carrier, and the second parameter comprises a maximum or a minimum of a maximum number of repetitions of a common search space on the second downlink carrier for random access.

12. An apparatus for measuring channel quality, comprising:

the receiving and transmitting unit is used for receiving configuration information sent by the network equipment, wherein the configuration information is used for configuring a downlink carrier set;

a processing unit, configured to determine the configuration information;

the receiving and transmitting unit is further configured to receive first information sent by the network device, where the first information is used to schedule a random access procedure message two Msg2, the first information includes a first parameter, and the first parameter includes a repetition number of a downlink channel carrying the first information;

The processing unit is further configured to determine the first parameter;

the transceiver unit is further configured to send second information and third information to the network device, where the second information includes information for indicating channel quality of a first downlink carrier, the first downlink carrier includes a third downlink carrier, the third downlink carrier is a downlink carrier with a best channel quality among one or more carriers, the one or more carriers are determined by the device from the downlink carrier set, the third information is used to indicate that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used to indicate that the channel quality of the first downlink carrier is related to the second parameter, and the second parameter includes a maximum repetition number of a public search space for random access on a second downlink carrier, where the downlink carrier set includes the second downlink carrier.

13. The apparatus of claim 12, wherein the first downlink carrier comprises a downlink carrier carrying the Msg 2.

14. The apparatus of claim 12, wherein the second downlink carrier is a downlink carrier carrying the Msg 2.

15. The apparatus of claim 12, wherein the second downlink carrier is the third downlink carrier.

16. The apparatus of claim 15, wherein the second downlink carrier is the third downlink carrier, and wherein the second parameter comprises a maximum or a minimum of a maximum number of repetitions of a common search space on the second downlink carrier for random access.

17. The apparatus according to any one of claims 12 to 16, wherein the transceiver unit is specifically configured to:

transmitting the third information to the network device before transmitting a random access procedure message three Msg3 to the network device;

and sending the Msg3 to the network device, wherein the Msg3 comprises the second information.

18. An apparatus for measuring channel quality, comprising:

the processing unit is used for determining configuration information, wherein the configuration information is used for configuring a downlink carrier set;

the receiving and transmitting unit is used for transmitting the configuration information to the terminal equipment;

the processing unit is further configured to determine first information, where the first information is used to schedule a random access procedure message two Msg2, the first information includes a first parameter, and the first parameter includes a repetition number of a downlink channel carrying the first information;

The receiving and transmitting unit is further configured to send the first information to the terminal device;

the transceiver unit is further configured to receive the second information and third information, where the second information includes information for indicating channel quality of a first downlink carrier, the first downlink carrier includes a third downlink carrier, the third downlink carrier is a downlink carrier with a best channel quality in one or more carriers, the one or more carriers are determined by the terminal device from the downlink carrier set, the third information is used to indicate that the channel quality of the first downlink carrier is related to the first parameter, or the third information is used to indicate that the channel quality of the first downlink carrier is related to the second parameter, the second parameter includes a maximum repetition number of a common search space used for random access on the second downlink carrier, and the downlink carrier set includes the second downlink carrier.

19. The apparatus of claim 18, wherein the first downlink carrier comprises a downlink carrier carrying the Msg 2.

20. The apparatus of claim 18 or 19, wherein the second downlink carrier is a downlink carrier carrying the Msg 2.

21. The apparatus of claim 18, wherein the second downlink carrier is the third downlink carrier.

22. The apparatus of claim 21, wherein the second downlink carrier is the third downlink carrier, and wherein the second parameter comprises a maximum or a minimum of a maximum number of repetitions of a common search space on the second downlink carrier for random access.

23. An apparatus for measuring channel quality, comprising at least one processor and interface circuitry, the at least one processor configured to perform the method of any of claims 1-6.

24. An apparatus for measuring channel quality, comprising at least one processor and interface circuitry, the at least one processor configured to perform the method of any of claims 7-11.

25. Terminal device comprising an apparatus according to any of claims 12-17 or comprising an apparatus according to claim 23.

26. A computer readable storage medium having instructions stored thereon which, when run on a computer, cause the computer to perform the method of any of claims 1 to 11.

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