CN116056248A

CN116056248A - Random access method, device, communication equipment and storage medium

Info

Publication number: CN116056248A
Application number: CN202111264562.3A
Authority: CN
Inventors: 左君; 郑毅; 李岩; 曹昱华; 王飞
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2023-05-02

Abstract

The embodiment of the invention discloses a random access method, a device, communication equipment and a storage medium. The method comprises the following steps: the terminal equipment receives a message sent by the network equipment, wherein the message comprises at least one of Sounding Reference Signal (SRS) resource indication information and random access transmission opportunity (RO) index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence; the terminal device transmits the random access pilot sequence based on the message.

Description

Random access method, device, communication equipment and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a random access method, apparatus, communications device, and storage medium.

Background

Since the transmission power of the terminal is limited, uplink coverage is generally limited, and the signal attenuation of the high frequency band is large, the coverage performance needs to be further enhanced. There is currently proposed a method for solving the above-mentioned problems by deploying a low-cost node (Rx only node) having only a reception function. After the Rx only node is introduced, the process of accessing the terminal into the network comprises the following steps: the terminal firstly performs traditional random access with a receiving and transmitting node (TRP, transmission Reception Point), and accesses the network through the TRP; before the terminal communicates with the Rx only node, it needs to know what spatial transmission parameters to use to send uplink information, etc.

Disclosure of Invention

In order to solve the existing technical problems, the embodiment of the invention provides a random access method, a device, communication equipment and a storage medium.

In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:

in a first aspect, an embodiment of the present invention provides a method for random access, where the method includes:

the terminal device receives a message sent by the network device, wherein the message comprises at least one of sounding reference signal (SRS, sounding Reference Signal) resource indication information and random access transmission opportunity (RO) index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence; the terminal device transmits the random access pilot sequence based on the message.

In the above solution, in the case that the message does not include the RO index information, the method further includes: the terminal equipment receives a first high-layer signaling sent by the network equipment, wherein the first high-layer signaling comprises the RO index information.

In the above scheme, the terminal device sends the random access pilot sequence based on the message, including: the terminal equipment determines a first space transmission parameter based on the SRS resource indication information, wherein the first space transmission parameter comprises at least one parameter of a first space filtering parameter and a first space direction;

the terminal equipment determines time-frequency resources for transmitting the pilot sequence based on the RO index information; the terminal device sends the random access pilot sequence based on the time-frequency resource and the first space transmission parameter.

In the above scheme, the terminal device receives a message sent by the network device, including:

the terminal equipment receives downlink control information (DCI, downlink Control Information) sent by the network equipment, wherein the DCI carries the message.

In the above scheme, the DCI format is DCI format 1_0, and the DCI includes a frequency domain resource allocation domain, where the frequency domain resource allocation domain is set to 1, and the DCI is scrambled with a Cell radio network temporary identifier (C-RNTI, cell-Radio Network Temporary Identifier).

In the above solution, before the terminal device sends the random access pilot sequence based on the message, the method further includes:

The terminal equipment determines the power for transmitting the random access pilot sequence;

the terminal device sends the random access pilot sequence based on the message, including:

and the terminal equipment transmits the random access pilot sequence according to the power.

In the above scheme, the determining, by the terminal device, the power for transmitting the random access pilot sequence includes:

the terminal device determines the power for transmitting the random access pilot sequence based on a maximum transmit power, a target transmit power, a path loss, and a path loss attenuation factor.

In the above solution, the determining, by the terminal device, the power for transmitting the random access pilot sequence based on the maximum transmission power, the target transmission power, the path loss and the path loss attenuation factor includes:

the terminal device determines a sum of a product of a path loss and a path loss attenuation factor and the target transmission power, and takes a smaller value between the sum and the maximum transmission power as the power for transmitting the random access pilot sequence.

In the above scheme, the method further comprises: the terminal equipment receives a second high-layer signaling sent by the network equipment, wherein the second high-layer signaling comprises the value of the path loss attenuation factor; or,

The terminal device determines the value of the path loss attenuation factor based on the path loss attenuation factor information indicated in the DCI.

In a second aspect, an embodiment of the present invention further provides a random access method, where the method includes:

the network equipment sends a message to the terminal equipment, wherein the message comprises at least one of SRS resource indication information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, and the RO index information is used for indicating an RO index of a transmission pilot sequence;

the network device receives a random access pilot sequence sent by the terminal device.

In the above solution, in the case that the message does not include the RO index information, the method further includes: the network device sends a first higher layer signaling to the terminal device, wherein the first higher layer signaling comprises the RO index information.

In the above scheme, the network device sends a message to the terminal device, including:

and the network equipment sends DCI to the terminal equipment, wherein the DCI carries the message.

In the above scheme, the DCI format is DCI format 1_0, and the DCI includes a frequency domain resource allocation domain, where the frequency domain resource allocation domain is set to 1, and the DCI is scrambled with a C-RNTI.

In the above scheme, the method further comprises: the network equipment sends a second high-layer signaling to the terminal equipment, wherein the second high-layer signaling comprises the value of a path loss attenuation factor; or,

the DCI comprises path loss attenuation factor information, wherein the path loss attenuation factor information is used for indicating the value of the path loss attenuation factor; the path loss attenuation factor is used by the terminal device to determine the power used to transmit the random access pilot sequence.

In a third aspect, an embodiment of the present invention further provides a random access apparatus, where the apparatus includes a first receiving unit and a first sending unit; wherein,,

the first receiving unit is configured to receive a message sent by a network device, where the message includes at least one of SRS resource indication information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence;

the first sending unit is configured to send the random access pilot sequence based on the message.

In a fourth aspect, the embodiment of the present invention further provides a random access apparatus, where the apparatus includes a second sending unit and a second receiving unit; wherein,,

the second sending unit is configured to send a message to a terminal device, where the message includes at least one of SRS resource indication information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, and the RO index information is used for indicating an RO index of a transmission pilot sequence;

the second receiving unit is configured to receive a random access pilot sequence sent by the terminal device.

In a fifth aspect, an embodiment of the present invention further provides a communication device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the program to implement the steps of the foregoing application of the embodiment of the present invention to the method of the first aspect or the second aspect.

In a sixth aspect, embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the steps of the foregoing method of the first or second aspects of embodiments of the present invention.

The embodiment of the invention provides a random access method, a device, communication equipment and a storage medium, wherein terminal equipment receives a message sent by network equipment, wherein the message comprises at least one of SRS resource indication (SRI, SRS Resource Indicator) information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence; the random access pilot sequence is transmitted based on the message. By adopting the technical scheme of the embodiment of the invention, the terminal adopts the space transmission parameters indicated by the network equipment to send the random access pilot sequence, so that the terminal is ensured to adopt the better space transmission parameters to send the random access pilot sequence, and the terminal is enabled to access the Rx only node according to the better space transmission parameters; the terminal adopts RO indicated by the network equipment to send the random access pilot sequence, thereby reducing blind detection of the network side (such as Rx only node) and reducing time delay of random access.

Drawings

Fig. 1 is a flowchart of a method for random access according to an embodiment of the present invention;

Fig. 2 is a second flow chart of a method of random access according to an embodiment of the present invention;

fig. 3 is an interactive flow diagram of a random access method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a composition structure of a random access device according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a second component structure of a random access device according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a hardware composition structure of a communication device according to an embodiment of the present invention.

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings and specific examples.

The technical scheme of the embodiment of the invention can be applied to various communication systems, such as: global system for mobile communications (GSM, global System of Mobile communication), long term evolution (LTE, long Term Evolution) or 5G systems, etc. Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

By way of example, the communication system to which the embodiments of the present invention are applied may include network devices and terminal devices (may also be referred to as terminals, communication terminals, etc.); the network device may be a device in communication with the terminal device. Wherein the network device may provide communication coverage for a range of areas and may communicate with terminals located within the areas. Alternatively, the network device may be a base station in each communication system, such as an evolved base station (eNB, evolutional Node B) in an LTE system, and also such as a base station (gNB) in a 5G system or an NR system.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. The communication device may include a network device and a terminal having a communication function, where the network device and the terminal device may be the specific devices described above, and are not described herein; the communication device may also include other devices in the communication system, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present invention.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The embodiment of the invention provides a random access method. Fig. 1 is a flowchart of a method for random access according to an embodiment of the present invention; as shown in fig. 1, the method includes:

step 101: the terminal equipment receives a message sent by the network equipment, wherein the message comprises at least one of SRS resource indication information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence;

Step 102: the terminal device transmits the random access pilot sequence based on the message.

In this embodiment, the network device triggers the terminal device to initiate random access through the message. Wherein the message includes at least one of SRS resource indication information and RO index information. Illustratively, the message may include at least one of an SRI information field and an RO index information field, where the SRI information field is used to indicate an SRS resource index; wherein the SRS resource includes spatial transmission parameters including, for example, spatial filtering parameters and/or spatial directions, and the spatial transmission parameter corresponding to the SRS resource index is identical to the spatial transmission parameter used for transmitting the random access pilot sequence, so that the terminal device may determine the spatial transmission parameter used for transmitting the random access pilot sequence according to the SRS resource index. The RO index information field is used for indicating an RO index for transmitting the random access pilot sequence, and the RO index corresponds to time-frequency resources used by the terminal equipment for transmitting the random access pilot sequence. The random access pilot sequence may also be referred to as a random access Preamble (Preamble) or simply as a Preamble (Preamble), for example.

In some optional embodiments, the terminal device transmitting the random access pilot sequence based on the message comprises: the terminal equipment determines a first space transmission parameter based on the SRS resource indication information, wherein the first space transmission parameter comprises at least one parameter of a first space filtering parameter and a first space direction; the terminal equipment determines time-frequency resources for transmitting the pilot sequence based on the RO index information; the terminal device sends the random access pilot sequence based on the time-frequency resource and the first space transmission parameter.

In this embodiment, the terminal device may initiate random access, i.e. send a random access pilot sequence, based on the first spatial transmission parameter (e.g. including the first spatial filtering parameter and/or the first spatial direction) and/or the time-frequency resource corresponding to the RO index determined by the SRI information.

For example, the first spatial transmission parameter may include a first spatial filtering parameter and a first spatial direction indicated by the network device and corresponding to the Rx only node, and the terminal device may transmit the random access pilot sequence according to the first spatial filtering parameter and the first spatial direction, so that the Rx only node may receive the random access pilot sequence,

In some optional embodiments of the invention, in case the RO index information is not included in the message, the method further comprises: the terminal equipment receives a first high-layer signaling sent by the network equipment, wherein the first high-layer signaling comprises the RO index information.

In this embodiment, in the case where the RO index information is not included in the message, that is, in the case where the RO index information field is not included in the message, the network device indicates the RO index information to the terminal device through the first higher layer signaling. It should be noted that, the first higher layer signaling may be any higher layer signaling, and in this embodiment, the higher layer signaling is not limited.

In some optional embodiments of the present invention, the terminal device receives a message sent by a network device, including: and the terminal equipment receives DCI sent by the network equipment, wherein the DCI carries the message.

In this embodiment, the message may be DCI, or the message may be included in DCI.

In some alternative embodiments, the format of the DCI is DCI format 1_0, and the DCI includes a frequency domain resource allocation domain, where the frequency domain resource allocation domain is set to 1, and the DCI is scrambled with a C-RNTI.

In this embodiment, the Format (Format) of the DCI may include a plurality of types, including, for example, DCI Format 0 series, DCI Format 1 series, DCI Format 2 series, and the like. The DCI Format 1 series includes, for example, DCI Format 1_0, DCI Format 1_1, DCI Format 1_2, and so on, where the DCI Format 1_0 is adopted to carry the above message in this embodiment. The DCI of DCI Format 1_0 includes a frequency domain resource allocation (FDRA, frequency Domain Resource Assignment) field in addition to at least one of the SRI information field and the RO index information field in the message, and the frequency domain resource allocation field is set to 1, that is, 1 regardless of that the frequency domain resource allocation field occupies several bits. And, the DCI is scrambled by adopting C-RNTI.

In some optional embodiments of the invention, before the terminal device sends the random access pilot sequence based on the message, the method further comprises: the terminal equipment determines the power for transmitting the random access pilot sequence; the terminal device sends the random access pilot sequence based on the message, including: and the terminal equipment transmits the random access pilot sequence according to the power.

In this embodiment, before transmitting the random access pilot sequence, the terminal device determines the power for transmitting the random access pilot sequence, and then transmits the random access pilot sequence according to the determined power.

In some alternative embodiments, the terminal device determining the power for transmitting the random access pilot sequence comprises: the terminal device determines the power for transmitting the random access pilot sequence based on a maximum transmit power, a target transmit power, a path loss, and a path loss attenuation factor.

In the related technical scheme, the terminal equipment determines the power P for transmitting the random access pilot sequence based on the following expression _PRACH,b,f,c (i)：

P _PRACH,b,f,c (i)＝min{P _CMAX,f,c (i),P _{PRACH,target,f,c} +PL _b,f,c } (1)

Wherein P is _CMAX,f,c (i) Indicating maximum transmit power, P _{PRACH,target,f,c} Indicating the target transmit power, PL _b,f,c Representing the path loss.

The above power determined using expression (1) is applied to a conventional random access procedure between a terminal device and a network device (e.g., TRP, access device such as a conventional base station, etc.). The distance between the Rx only node and the terminal device is likely to be shorter than the distance between the network device and the terminal device, so in this embodiment, the power used in the random access procedure between the terminal and the Rx only node is different from the power used in the conventional random result procedure.

Based on this, in addition to determining the power according to the above parameters, the terminal device needs to determine the power for transmitting the random access pilot sequence according to a path loss attenuation factor.

In some optional embodiments, the determining, by the terminal device, the power for transmitting the random access pilot sequence based on a maximum transmit power, a target transmit power, a path loss, and a path loss attenuation factor, comprises: the terminal device determines a sum of a product of a path loss and a path loss attenuation factor and the target transmission power, and takes a smaller value between the sum and the maximum transmission power as the power for transmitting the random access pilot sequence.

Wherein, the terminal device determines the power P for transmitting the random access pilot sequence based on the following expression _PRACH,b,f,c (i)：

P _PRACH,b,f,c (i)＝min{P _CMAX,f,c (i),P _{PRACH,target,f,c} +a·PL _b,f,c } (2)

Wherein P is _CMAX,f,c (i) Indicating maximum transmit power, P _{PRACH,target,f,c} Indicating the target transmit power, PL _b,f,c Represents the path loss, and a represents the path loss attenuation factor.

The path loss can be calculated according to a downlink reference signal. The downlink reference signal may be, for example, a synchronization signal and a physical broadcast channel (PBCH, physical Broadcast Channel) block (SSB, synchronization Signal and PBCH Block).

In some alternative embodiments of the invention, the method further comprises: the terminal equipment receives a second high-layer signaling sent by the network equipment, wherein the second high-layer signaling comprises the value of the path loss attenuation factor; or, the terminal device determines the value of the path loss attenuation factor based on the path loss attenuation factor information indicated in the DCI.

In this embodiment, the path loss attenuation factor can be determined by at least two methods: one way is: the terminal device may determine the value of the path loss attenuation factor based on an indication of the second higher layer signaling sent by the network device. The second higher layer signaling may be radio resource control (RRC, radio Resource Control) signaling, or medium access control element (MAC CE, medium Access Control Control Element), or the like, which is exemplary, and of course, the second higher layer signaling may also be other higher layer signaling, which is not limited in this embodiment; in another way, when the network device carries the message through the DCI, the network device indicates the value of the path loss attenuation factor through the path loss attenuation factor information indication field in the DCI; in practical application, the terminal device receives the value set of the path loss factor configured by the network device, and then determines that the path loss factor adopts a certain value in the value set through the indication in the DCI.

For example, the network device may configure a set of values for the path loss factor through RRC signaling, which may be {1,0.8,0.6,0.4}. The set of values of the path loss factor is expressed, for example, as: pathloss scaling factor ENUMERATED {1,0.8,0.6,0.4}.

The DCI format1_0 is added with a path loss attenuation factor information indication field (PL scaling factor field), and the path loss attenuation factor information indication field may occupy 2 bits.

Then when PL scaling factor domain=00, the path loss factor=1;

when PL scaling factor domain=01, the path loss factor=0.8;

when PL scaling factor domain=10, the path loss factor=0.6;

when PL scaling factor domain=11, the path loss factor=0.4.

Note that, the first higher layer signaling and the second higher layer signaling in this embodiment may be the same higher layer signaling, for example, may be the same RRC signaling, or may also be different higher layer signaling.

Based on the above embodiment, the embodiment of the present invention further provides a random access method. Fig. 2 is a second flow chart of a method of random access according to an embodiment of the present invention; as shown in fig. 2, the method includes:

step 201: the network equipment sends a message to the terminal equipment, wherein the message comprises at least one of SRS resource indication information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, and the RO index information is used for indicating an RO index of a transmission pilot sequence;

Step 202: the network device receives a random access pilot sequence sent by the terminal device.

Furthermore, the terminal device may initiate random access based on the first spatial transmission parameter (e.g. including the first spatial filtering parameter and/or the first spatial direction) and/or the time-frequency resource corresponding to the RO index determined by the SRI information, i.e. send a random access pilot sequence, and the network device receives the random access pilot sequence sent by the terminal device.

For example, the first spatial transmission parameter may include a first spatial filtering parameter and a first spatial direction, which are indicated by the network device and correspond to the Rx only node, and the terminal device may send the random access pilot sequence according to the first spatial filtering parameter and the first spatial direction, so that the Rx only node may receive the random access pilot sequence.

In some optional embodiments of the invention, in case the RO index information is not included in the message, the method further comprises: the network device sends a first higher layer signaling to the terminal device, wherein the first higher layer signaling comprises the RO index information.

In some optional embodiments of the invention, the network device sending a message to a terminal device comprises: and the network equipment sends DCI to the terminal equipment, wherein the DCI carries the message.

In this embodiment, the Format (Format) of the DCI may include a plurality of types, and in this embodiment, DCI Format 1_0 is used to carry the above message. The DCI of DCI Format 1_0 includes a Frequency Domain Resource Allocation (FDRA) domain in addition to at least one of an SRI information domain and an RO index information domain in a message, and the frequency domain resource allocation domain is set to 1, that is, no matter how many bits the frequency domain resource allocation domain occupies, it is set to 1. And, the DCI is scrambled by adopting C-RNTI.

In some alternative embodiments of the invention, the method further comprises: the network equipment sends a second high-layer signaling to the terminal equipment, wherein the second high-layer signaling comprises the value of a path loss attenuation factor; or, the DCI includes path loss attenuation factor information, where the path loss attenuation factor information is used to indicate a value of a path loss attenuation factor; the path loss attenuation factor is used by the terminal device to determine the power used to transmit the random access pilot sequence.

In this embodiment, before transmitting the random access pilot sequence, the terminal device determines the power for transmitting the random access pilot sequence, and then transmits the random access pilot sequence according to the determined power. In this embodiment, the terminal device needs to determine the power for transmitting the random access pilot sequence based on the maximum transmission power, the target transmission power, the path loss, and the path loss attenuation factor. Thus, as an embodiment, the network device may indicate the value of the path loss attenuation factor through the second higher layer signaling. The second higher layer signaling may be RRC signaling, or MAC CE, etc. as an example, and of course, the second higher layer signaling may also be other higher layer signaling, which is not limited in this embodiment. In other embodiments, the network device may also configure the value set of the pathloss factor to the terminal device, and then determine, through the indication in the DCI, that the pathloss factor adopts a certain value in the value set.

By adopting the technical scheme of the embodiment of the invention, the terminal adopts the space transmission parameters indicated by the network equipment to send the random access pilot sequence, so that the terminal is ensured to adopt better space transmission parameters to send the random access pilot sequence; the terminal adopts RO indicated by the network equipment to send the random access pilot sequence, thereby reducing blind detection of the network equipment and reducing time delay of random access. In addition, because the terminal equipment receives the linear reference signal and is different from the node of the uplink transmission, the power for transmitting the random access pilot sequence is determined by introducing the path loss factor, the transmission power of the terminal equipment is avoided being larger, and the energy consumption of the terminal is saved.

The method for random access according to the embodiment of the present invention is described below with reference to a specific example, in which a network device is used as a TRP and a terminal device is used as a UE.

Fig. 3 is an interactive flow diagram of a random access method according to an embodiment of the present invention; as shown in fig. 3, the method includes:

step 301: the TRP transmits RRC configuration information to the UE.

Here, the RRC configuration information may also be referred to as RRC signaling. In one embodiment, the RRC configuration information may correspond to the second higher layer signaling in the foregoing embodiment, that is, the RRC configuration information may include a pathloss attenuation factor value. And/or, the RRC configuration information may correspond to the first higher layer signaling in the foregoing embodiment, that is, the RRC configuration information may include RO index information.

Step 302: the TRP triggers the random access of the UE through the DCI.

The step is equivalent to that in the foregoing embodiment, the network device sends DCI carrying a message to the terminal, where the message includes at least one of SRS resource indication information and RO index information; the format of the DCI is DCI format 1_0, the DCI comprises a frequency domain resource allocation domain, the frequency domain resource allocation domain is set to be 1, and the DCI is scrambled by adopting C-RNTI. The UE may initiate random access based on the first spatial transmission parameters (e.g., including the first spatial filtering parameters and/or the first spatial direction) and/or the time-frequency resources corresponding to the RO index determined by the SRI information. Wherein, the first spatial transmission parameters may include a first spatial filtering parameter and a first spatial direction indicated by TRP and corresponding to an Rx only node.

Step 303: the UE transmits a random access preamble sequence.

Here, since the first spatial transmission parameter may include a first spatial filtering parameter and a first spatial direction indicated by TRP and corresponding to the Rx only node, the UE may transmit a random access pilot sequence according to the first spatial filtering parameter and the first spatial direction, so that the Rx only node may receive the random access pilot sequence.

In some alternative embodiments, the above method may further comprise: the network side equipment (such as an Rx only node) determines Timing Advance (TA) information of the UE and the Rx only node according to the received random access pilot sequence.

In this embodiment, before the UE communicates with the Rx only node, in order to ensure uplink synchronization, it is necessary to know TA information of the UE and the Rx only node. The terminal device transmits a random access pilot sequence and the network side device (e.g., rx only node) may determine the TA information according to the received random access pilot sequence.

It should be noted that, before the UE communicates with the TRP, that is, before step 301 is performed, the UE needs to access the TRP by using a conventional random access procedure, and after the UE accesses the network, the UE may receive information about the RRC connection configuration sent by the TRP.

The embodiment of the invention also provides a random access device. Fig. 4 is a schematic diagram of a composition structure of a random access device according to an embodiment of the present invention; as shown in fig. 4, the apparatus includes a first receiving unit 31 and a first transmitting unit 32; wherein,,

the first receiving unit 31 is configured to receive a message sent by a network device, where the message includes at least one of SRS resource indication information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence;

The first transmitting unit 32 is configured to transmit the random access pilot sequence based on the message.

In some optional embodiments of the present invention, the first receiving unit 31 is further configured to receive a first higher layer signaling sent by the network device, where the message does not include the RO index information, and the first higher layer signaling includes the RO index information.

In some optional embodiments of the invention, the apparatus further comprises a first processing unit 33 configured to determine a first spatial transmission parameter based on the SRS resource indication information, the first spatial transmission parameter comprising at least one of a first spatial filtering parameter and a first spatial direction; determining a time-frequency resource for transmitting the pilot sequence based on the RO index information;

the first sending unit 32 is configured to send the random access pilot sequence based on the time-frequency resource and the first spatial transmission parameter.

In some optional embodiments of the present invention, the first receiving unit 31 is configured to receive DCI sent by a network device, where the DCI carries the message.

In some optional embodiments of the present invention, the DCI format is DCI format 1_0, and the DCI includes a frequency domain resource allocation domain, where the frequency domain resource allocation domain is set to 1, and the DCI is scrambled with a C-RNTI.

In some alternative embodiments of the invention, the apparatus further comprises a first processing unit 33 for determining a power for transmitting the random access pilot sequence;

the first transmitting unit 32 is configured to transmit the random access pilot sequence according to the power.

In some alternative embodiments of the present invention, the first processing unit 33 is configured to determine the power for transmitting the random access pilot sequence based on a maximum transmission power, a target transmission power, a path loss, and a path loss attenuation factor.

In some alternative embodiments of the present invention, the first processing unit 33 is configured to determine a sum of a product of a path loss and a path loss attenuation factor and the target transmit power, and take a smaller value between the sum and the maximum transmit power as the power for transmitting the random access pilot sequence.

In some optional embodiments of the present invention, the first receiving unit 31 is further configured to receive a second higher layer signaling sent by the network device, where the second higher layer signaling includes the value of the path loss attenuation factor; or,

the first processing unit 33 is configured to determine a value of the path loss attenuation factor based on the path loss attenuation factor information indicated in the DCI.

In the embodiment of the invention, the device is applied to the terminal equipment. The first processing unit 33 in the device may be realized in practice by a central processing unit (CPU, central Processing Unit), a digital signal processor (DSP, digital Signal Processor), a micro control unit (MCU, microcontroller Unit) or a programmable gate array (FPGA, field-Programmable Gate Array); the first receiving unit 31 and the first transmitting unit 32 in the device can be realized by a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface, a protocol and the like) and a receiving and transmitting antenna in practical application.

The embodiment of the invention also provides a random access device. Fig. 5 is a schematic diagram of a second component structure of a random access device according to an embodiment of the present invention; as shown in fig. 5, the apparatus includes a second transmitting unit 42 and a second receiving unit 41; wherein,,

the second sending unit 42 is configured to send a message to the terminal device, where the message includes at least one of SRS resource indication information and RO index information; the SRS resource indication information is used for indicating an SRS resource index, and the RO index information is used for indicating an RO index of a transmission pilot sequence;

The second receiving unit 41 is configured to receive a random access pilot sequence sent by the terminal device.

In some optional embodiments of the present invention, the second sending unit 42 is further configured to send a first higher layer signaling to the terminal device, where the RO index information is not included in the message, and the first higher layer signaling includes the RO index information.

In some optional embodiments of the present invention, the second sending unit 42 is configured to send DCI to the terminal device, where the DCI carries the message.

In some optional embodiments of the present invention, the second sending unit 42 is further configured to send a second higher layer signaling to the terminal device, where the second higher layer signaling includes a value of a path loss attenuation factor; or,

In the embodiment of the invention, the device is applied to network equipment. The second receiving unit 41 and the second transmitting unit 42 in the device can be realized by a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface, a protocol and the like) and a receiving and transmitting antenna in practical application.

It should be noted that: in the random access device provided in the above embodiment, only the division of each program module is used for illustration, and in practical application, the process allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processes described above. In addition, the random access device provided in the above embodiment and the random access method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which is not repeated here.

The embodiment of the invention also provides a communication device, which is specifically a terminal device or a network device in the foregoing embodiment. Fig. 6 is a schematic diagram of a hardware composition structure of a communication device according to an embodiment of the present invention, as shown in fig. 6, where the communication device includes a memory 52, a processor 51, and a computer program stored in the memory 52 and capable of running on the processor 51, and when the processor 51 executes the program, the steps of the method for implementing random access in a terminal device or a network device according to an embodiment of the present invention are implemented.

Optionally, the communication device may also include one or more network interfaces 53. It will be appreciated that the various components in the communication device are coupled together by a bus system 54. It is understood that the bus system 54 is used to enable connected communications between these components. The bus system 54 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration the various buses are labeled as bus system 54 in fig. 6.

It will be appreciated that the memory 52 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Wherein the nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (PROM, programmable Read-Only Memory), erasable programmable Read Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable Read Only Memory (EEPROM, electrically Erasable Programmable Read-Only Memory), magnetic random access Memory (FRAM, ferromagnetic Random Access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk Read Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory 52 described in embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The method disclosed in the above embodiment of the present invention may be applied to the processor 51 or implemented by the processor 51. The processor 51 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 51 or by instructions in the form of software. The processor 51 may be a general purpose processor, DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 51 may implement or perform the methods, steps and logic blocks disclosed in embodiments of the present invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the invention can be directly embodied in the hardware of the decoding processor or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium in a memory 52. The processor 51 reads information in the memory 52 and, in combination with its hardware, performs the steps of the method as described above.

In an exemplary embodiment, the communication device may be implemented by one or more application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSP, programmable logic device (PLD, programmable Logic Device), complex programmable logic device (CPLD, complex Programmable Logic Device), FPGA, general purpose processor, controller, MCU, microprocessor, or other electronic element for performing the aforementioned methods.

In an exemplary embodiment, the present invention also provides a computer readable storage medium, such as a memory 52, comprising a computer program executable by the processor 51 of the communication device to perform the steps of the method described above. The computer readable storage medium may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM; but may be a variety of devices including one or any combination of the above memories.

The computer readable storage medium provided by the embodiment of the present invention stores a computer program thereon, which when executed by a processor implements the steps of the method of random access applied to a terminal device or a network device by the embodiment of the present invention.

The methods disclosed in the several method embodiments provided in the present application may be arbitrarily combined without collision to obtain a new method embodiment.

The features disclosed in the several product embodiments provided in the present application may be combined arbitrarily without conflict to obtain new product embodiments.

The features disclosed in the several method or apparatus embodiments provided in the present application may be arbitrarily combined without conflict to obtain new method embodiments or apparatus embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.

The units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units; some or all of the units 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 invention may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.

Alternatively, the above-described integrated units of the present invention may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art 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 execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of random access, the method comprising:

the method comprises the steps that a terminal device receives a message sent by a network device, wherein the message comprises at least one of SRS resource indication information and random access transmission opportunity (RO) index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence;

the terminal device transmits the random access pilot sequence based on the message.

2. The method of claim 1, wherein in the case that the RO index information is not included in the message, the method further comprises:

The terminal equipment receives a first high-layer signaling sent by the network equipment, wherein the first high-layer signaling comprises the RO index information.

3. The method according to claim 1 or 2, wherein the terminal device transmitting the random access pilot sequence based on the message comprises:

the terminal equipment determines a first space transmission parameter based on the SRS resource indication information, wherein the first space transmission parameter comprises at least one parameter of a first space filtering parameter and a first space direction;

the terminal equipment determines time-frequency resources for transmitting the pilot sequence based on the RO index information;

the terminal device sends the random access pilot sequence based on the time-frequency resource and the first space transmission parameter.

4. The method of claim 1, wherein the terminal device receives a message sent by a network device, comprising:

the terminal equipment receives Downlink Control Information (DCI) sent by the network equipment, wherein the DCI carries the message.

5. The method of claim 4, wherein the DCI is in a format of DCI format 1_0, and the DCI includes a frequency-domain resource allocation field, the frequency-domain resource allocation field is set to 1, and the DCI is scrambled with a cell radio network temporary identity C-RNTI.

6. The method of claim 4, wherein prior to the terminal device transmitting the random access pilot sequence based on the message, the method further comprises:

7. The method of claim 6, wherein the terminal device determining the power for transmitting the random access pilot sequence comprises:

8. The method of claim 7, wherein the terminal device determining the power for transmitting the random access pilot sequence based on a maximum transmit power, a target transmit power, a path loss, and a path loss attenuation factor comprises:

9. The method of claim 7, wherein the method further comprises:

the terminal equipment receives a second high-layer signaling sent by the network equipment, wherein the second high-layer signaling comprises the value of the path loss attenuation factor; or,

10. A method of random access, the method comprising:

the network equipment sends a message to the terminal equipment, wherein the message comprises at least one of SRS resource indication information and random access transmission opportunity (RO) index information; the SRS resource indication information is used for indicating an SRS resource index, and the RO index information is used for indicating an RO index of a transmission pilot sequence;

11. The method of claim 10, wherein in the case that the RO index information is not included in the message, the method further comprises:

the network device sends a first higher layer signaling to the terminal device, wherein the first higher layer signaling comprises the RO index information.

12. The method of claim 10, wherein the network device sending a message to a terminal device comprises:

and the network equipment sends Downlink Control Information (DCI) to the terminal equipment, wherein the DCI carries the message.

13. The method of claim 12, wherein the DCI is in a format of DCI format 1_0, and the DCI includes a frequency-domain resource allocation field, the frequency-domain resource allocation field is set to 1, and the DCI is scrambled with a C-RNTI.

14. The method according to claim 12, wherein the method further comprises:

the network equipment sends a second high-layer signaling to the terminal equipment, wherein the second high-layer signaling comprises the value of a path loss attenuation factor; or,

15. A device for random access, characterized in that the device comprises a first receiving unit and a first transmitting unit; wherein,,

the first receiving unit is configured to receive a message sent by a network device, where the message includes at least one of sounding reference signal SRS resource indication information and random access transmission opportunity RO index information; the SRS resource indication information is used for indicating an SRS resource index, the space transmission parameter used for transmitting the random access pilot sequence is the same as the space transmission parameter of the SRS resource indicated by the SRS resource indication information, and the RO index information is used for indicating the RO index used for transmitting the random access pilot sequence;

16. A device for random access, characterized in that the device comprises a second transmitting unit and a second receiving unit; wherein,,

the second sending unit is configured to send a message to a terminal device, where the message includes at least one of sounding reference signal SRS resource indication information and random access transmission opportunity RO index information; the SRS resource indication information is used for indicating an SRS resource index, and the RO index information is used for indicating an RO index of a transmission pilot sequence;

17. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of claims 1 to 9 when the program is executed; or,

the processor, when executing the program, implements the steps of the method of any one of claims 10 to 14.

18. A computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor realizes the steps of the method according to any of claims 1 to 9; or,

The program when executed by a processor implementing the steps of the method of any of claims 10 to 14.