CN109600211B

CN109600211B - Method and device for processing frequency hopping of random access preamble, terminal and storage medium

Info

Publication number: CN109600211B
Application number: CN201711377581.0A
Authority: CN
Inventors: 杨玲; 赵亚军; 张峻峰; 李新彩; 徐汉青
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-09-30
Filing date: 2017-12-19
Publication date: 2024-06-07
Anticipated expiration: 2037-12-19
Also published as: CN109600211A

Abstract

According to the method and the device for processing the frequency hopping of the random access Preamble, the terminal and the storage medium, under the condition of enabling the frequency hopping of the Preamble, the Preamble is sent on resources appointed by the frequency hopping pattern according to a preset frequency hopping pattern or rule; and receiving or detecting the Preamble on the designated resource according to the preset frequency hopping pattern, wherein when the Preamble is transmitted, frequency hopping is performed on a frequency domain, so that the uplink coverage is improved, and the frequency domain diversity gain is obtained.

Description

Method and device for processing frequency hopping of random access preamble, terminal and storage medium

Technical Field

The present invention relates to the field of communications, and in particular, to a method and apparatus for processing a Preamble (random access Preamble), a terminal, and a computer readable storage medium.

Background

Compared with 2G, 3G and 4G systems, the new generation 5G mobile communication system works in a relatively high carrier frequency band, such as 3GHz-6GHz, and even more than 6GHz; compared with the low frequency band, the frequency bands have the characteristics of larger transmission loss, smaller coverage range under the same power and the like; currently, a solution for coverage increase of a 5G system is implemented by means of beam-forming technology, however, the uplink coverage of such a solution is still not large enough.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide a method and a device for processing the frequency hopping of a random access preamble, a terminal and a computer readable storage medium, and solve the problem of insufficient uplink coverage in the prior art.

In order to solve the above technical problems, an embodiment of the present invention provides a method for processing frequency hopping of a random access preamble, including:

Under the condition of frequency hopping enabling, the transmission equipment transmits the random access preamble on the appointed resource according to a preset frequency hopping pattern or rule; and/or the number of the groups of groups,

The transmission device receives or detects the random access preamble on the specified resources.

In one embodiment, the hopping pattern or rule is determined according to at least one of the following parameters:

A format of a random access preamble;

A time domain structure of a random access preamble;

The number of transmissions or repeated transmissions of the random access preamble;

Frequency hopping time domain granularity Y;

The number of symbols occupied by the random access preamble;

A frequency hopping bandwidth;

The number of frequency domain resources K on the physical random access channel that can be used to transmit the random access preamble;

A subcarrier spacing SCS;

The number of available subbands T1;

Frequency domain location or index;

Subband location or subband index.

In an embodiment, the time domain structure of the random access preamble includes at least one of:

M1 cyclic prefixes CP;

N random access preamble sequences;

m2 guard intervals GT;

Wherein N is a positive integer greater than or equal to 1, M1 and M2 are positive integers greater than or equal to 1 and/or less than or equal to N.

In an embodiment, the N random access preamble sequences satisfy one of the following conditions:

The N random access preamble sequences are the same sequence;

The N random access preamble sequences are not identical sequences.

In one embodiment, the frequency hopping time domain granularity Y is one of the following:

a sub-frame; time slots; a small time slot; a unit consisting of Q OFDM symbols;

wherein Q is a positive integer greater than or equal to 1 and less than or equal to 6, or 7, or 12, or 14.

In one embodiment, the method comprises at least one of the following frequency domain resource allocation modes:

determining frequency domain resources on K physical random access channels for transmitting random access preambles on a frequency hopping bandwidth according to a specific mode;

dividing the frequency hopping bandwidth into T1 available sub-bands, wherein each sub-band comprises T2 frequency domain resources on a physical random access channel for transmitting a random access preamble; wherein the value obtained by multiplying T1 and T2 is equal to the number K of frequency domain resources.

In an embodiment, the size of the physical random access channel frequency domain resource for transmitting a random access preamble is related to the subcarrier spacing;

The size of the physical random access channel frequency domain resource at the subcarrier interval can be scaled up or down according to the size of the physical random access channel frequency domain resource at the corresponding subcarrier interval in the existing LTE.

In one embodiment, the frequency hopping bandwidth is determined by the following parameters: a frequency domain offset; continuous frequency domain resource length.

In an embodiment, for the case that the specified resource is a frequency domain resource of a specified physical random access channel after frequency hopping, or a subband to which the frequency domain resource of the physical random access channel belongs, the time may be determined by at least one of the following manners:

determining a frequency domain resource index of a designated physical random access channel after frequency hopping or a sub-band index to which the frequency domain resource of the physical random access channel belongs according to a value obtained by a preset rule or algorithm through at least one of the related parameters;

Wherein the relevant parameters include: the physical random access channel frequency domain resource index sent by the Preamble before frequency hopping, the Preamble index, the UE ID, the fixed offset, the prime number a and the prime number b obtained based on the frequency domain resource number K, the total number K of the physical random access channel frequency domain resources, mirror image enabling, frequency hopping enabling and frequency hopping direction/surrounding mode.

In an embodiment, the fixed offset amount offset includes at least one of:

the granularity of the fixed offset includes one of:

occupied frequency domain resource of physical random access channel; a sub-band;

The fixed offset value includes at least one of the following:

The offset is a positive integer greater than or equal to 0 and less than or equal to the number K of frequency domain resources;

The offset is a positive integer greater than or equal to 0 and less than or equal to the number of subbands T1.

In one embodiment, when the parameter is a Preamble index, the predetermined rule or algorithm is:

The frequency domain resource index of the appointed physical random access channel after frequency hopping, or the sub-band index to which the frequency domain resource belongs is the obtained value obtained by the module of the sent appointed Preamble index and the frequency domain resource number K of the physical random access channel, or the sub-band number T1.

In an embodiment, for a case that there are multiple UEs transmitting Preamble on the same available frequency domain resource, the Preamble transmitted by each UE on the same physical random access channel frequency domain resource satisfies one of the following conditions:

The Preamble index sent by each UE comes from different Preamble index groups;

and the Preamble index sent by each UE comes from the same Preamble index group.

In an embodiment, the partitioning manner of the Preamble index group includes at least one of the following:

Performing modular operation according to the Preamble index and the number K of the physical random access channel frequency domain resources, dividing the Preamble index with the same value obtained by the operation into the same Preamble index group, and dividing the Preamble index into K Preamble index groups;

and dividing the Preamble index into a plurality of Preamble index groups by taking the number K of the frequency domain resources of the physical random access channel as the division granularity, wherein the number K of the Preamble index contained in each Preamble index group.

In one embodiment, at least one of the following is also included:

for the case of performing modulo operation according to the transmission Preamble index and the number of frequency domain resources K of the physical random access channel:

When the mirror image is enabled, after frequency hopping, determining the frequency domain resource index of the physical random access channel of the Preamble according to the value obtained by the operation and the number K of the frequency domain resources of the physical random access channel; or alternatively

After frequency hopping, the physical random access channel frequency domain resource index of the Preamble is obtained by subtracting the calculated value from the number K of the physical random access channel frequency domain resources and subtracting or adding 1;

the case of performing a modulo operation according to the transmission Preamble index and the number of sub-bands T1 includes at least one of the following:

when the mirror image is enabled, determining the subband index of the Preamble after frequency hopping can be performed according to the value obtained by operation and the number T1 of subbands;

After frequency hopping, transmitting a subband index of the Preamble as a subband index T1 minus the value obtained by the operation and subtracting or adding 1; wherein, the relative position of the Preamble in the sub-band is unchanged;

When the mirror image in the sub-band is enabled, the frequency domain resource position of the Preamble sent in the sub-band after frequency hopping is the mirror image or symmetrical position of the Preamble in the sub-band relative to the number T2 of the frequency domain resources of the physical random access channel in the sub-band.

In one embodiment, when the parameter is a UE ID, the predetermined rule or algorithm is:

The frequency domain resource index of the appointed physical random access channel after frequency hopping, or the sub-band index to which the frequency domain resource belongs is the obtained value obtained by the UE ID and the frequency domain resource number K, or the sub-band number T1 after being modulo.

In an embodiment, for a case that there are multiple UEs transmitting the random access preamble on the same available frequency domain resource, the method further includes:

and for the situation that the indexes of the frequency domain resources after frequency hopping determined based on different UE IDs are the same, the indexes of the frequency domain resources after frequency hopping are adjusted by combining the parameters in the random access preambles, so that the indexes of the frequency domain resources adjusted after frequency hopping of the random access preambles corresponding to different UE IDs are different.

In one embodiment, when the parameter is a fixed offset value offset, the predetermined rule or algorithm is:

And determining the frequency domain resource index designated after the frequency hopping or the sub-band index to which the frequency domain resource belongs according to the frequency domain resource index to which the random access preamble is transmitted before the frequency hopping or the sub-band index to which the frequency domain resource belongs and the fixed offset.

In an embodiment, the determining, according to the frequency domain resource index of the random access preamble or the sub-band index to which the frequency domain resource belongs before frequency hopping and the fixed offset, the frequency domain resource index specified after frequency hopping or the sub-band index to which the frequency domain resource belongs includes at least one of the following:

The frequency domain resource index specified after frequency hopping, or the sub-band index to which the frequency domain resource belongs is: the frequency domain resource index of the random access preamble is sent before frequency hopping, or the obtained value of the sum of the sub-band index to which the frequency domain resource belongs and the fixed offset is obtained, and then the obtained value is obtained after the frequency domain resource number K or the sub-band number T1 is subjected to modulo;

the frequency domain resource index specified after frequency hopping, or the sub-band index to which the frequency domain resource belongs is: and transmitting a frequency domain resource index of the random access preamble or a value obtained by adding a subband index to which the frequency domain resource belongs and a fixed offset before frequency hopping.

In an embodiment, the fixed offset may be at least one of:

A value generated based on a random function; a value greater than or equal to 1 and less than or equal to the number of physical random access channel frequency domain resources K, or the number of subbands T1.

In an embodiment, on K frequency domain resources, or on T1 subband, determining a frequency domain resource index on a physical random access channel after frequency hopping in a surrounding manner, or determining a subband index after frequency hopping; wherein, the surrounding mode comprises one of the following: forward encircling; reverse wrapping.

In one embodiment, at least one of the following is also included:

For the case of determining the frequency domain resource index specified after the frequency hopping according to the frequency domain resource index of the random access preamble sent before the frequency hopping and the fixed offset:

for the case that the subband index to which the frequency domain resource for transmitting the random access Preamble belongs is determined according to the fixed offset, the subband index to which the frequency domain resource for transmitting the Preamble after frequency hopping belongs includes at least one of the following:

In one embodiment, one of the following is also included:

the frequency domain resource index designated after frequency hopping, or the sub-band index to which the frequency domain resource belongs is the frequency domain resource index to which the random access Preamble is sent before the frequency hopping, or the sub-band index to which the frequency domain resource belongs, or the Preamble index, the value obtained by multiplying the prime number a, the value obtained by adding the prime number b, the value obtained by taking the modulus with the frequency domain resource number K, or the sub-band number T1;

The frequency domain resource index designated after frequency hopping, or the sub-band index to which the frequency domain resource belongs is the frequency domain resource index to which the random access Preamble is sent before frequency hopping, or the sub-band index to which the frequency domain resource belongs, or the value obtained by multiplying the quadratic power of the Preamble index and the prime number a, and then the value obtained by adding the prime number b, and the value obtained by taking the modulus of the frequency domain resource number K, or the sub-band number T1.

In an embodiment, the frequency hopping is preceded by frequency hopping, and the last time, or, the first time, or, the previous time.

In an embodiment, the frequency domain starting position of the frequency domain resource on the physical random access channel includes one of the following:

when the resource is continuous in the frequency domain, the frequency domain starting position is calculated as follows:

Equation one: The first formula represents a frequency domain initial position determined by the direction of the resource from low frequency to high frequency in sequence;

Formula II: the second formula represents the frequency domain initial position determined by the direction of the resources from high frequency to low frequency in sequence;

When resources are distributed at two ends of a system bandwidth or a frequency hopping bandwidth and low-frequency and high-frequency positions are staggered, the frequency domain starting position is calculated in the following manner:

When resources are distributed at two ends of a system bandwidth or a frequency hopping bandwidth and one part of the resources are in low-frequency positions and the other part of the resources are in high-frequency positions, the frequency domain starting position is calculated according to the following mode:

Wherein the said The s is the subcarrier spacing for the frequency domain starting position; the n _offset is a frequency domain offset, the value of n _offset is a positive integer greater than or equal to 0 and less than or equal toIs a value of (2);

The said Representing the number of PRBs corresponding to the frequency hopping bandwidth or the number of PRBs corresponding to the system bandwidth;

The said Representing the number of PRBs occupied by the resources corresponding to the subcarrier spacing;

The Ki is an index number of the frequency domain resource position, the value range is [0, K-1], and the K is the number of the frequency domain resources;

the W is the number of continuous resources distributed at one end of the system bandwidth or the frequency hopping bandwidth; and W is half of K.

In an embodiment, the method for determining the configuration parameters of the hopping pattern or rule includes at least one of the following: predefined, higher layer RRC signaling, RMSI, physical layer DCI signaling.

In an embodiment, the obtaining manner may be further used to obtain at least one of the following configuration parameters:

A system bandwidth;

fixing the offset in the frequency domain; wherein, the offset granularity is physical random access channel frequency domain resource granularity or subband granularity;

mirror image enabling;

frequency hopping enabling;

frequency hopping direction or surround mode;

A frequency domain starting position of a physical random access channel resource;

A starting position of the subband;

A correspondence between Preamble index and physical random access channel resources;

the prime numbers a, b, a, b are prime numbers of the frequency domain resource data K, or a, b are prime numbers of the subband number T1.

In order to solve the above technical problem, an embodiment of the present invention further provides a device for processing frequency hopping of a random access preamble, including:

The judging module is used for judging whether the next random access preamble hops or not according to the random access preamble hopping enabling in the process of transmitting the N times of information;

The position determining module is used for designating frequency hopping resources according to a preset frequency hopping pattern or rule when the judgment result of the judging module is frequency hopping;

and the frequency hopping module is used for carrying out frequency hopping processing on the resources determined by the position determining module.

In order to solve the above technical problem, an embodiment of the present invention further provides a terminal, including: a processor, a memory, and a communication bus;

The communication bus is used for realizing connection communication between the processor and the memory;

the processor is configured to execute one or more programs stored in the memory to implement the frequency hopping transmission processing steps in the frequency hopping processing method as described above.

To solve the above technical problem, the embodiments of the present invention further provide a computer readable storage medium storing one or more programs executable by one or more processors to implement the steps of the frequency hopping processing method as described above.

The beneficial effects of the invention are as follows:

according to the method and the device for processing the frequency hopping of the random access preamble, the terminal and the computer readable storage medium, the frequency domain resource for processing the frequency hopping information can be appointed on the frequency hopping pattern or rule under the condition of frequency hopping enabling through the preset frequency hopping pattern or rule, and the frequency hopping processing comprises frequency hopping transmission of the terminal side and frequency hopping receiving or detection of the system side. According to the frequency hopping processing of the random access preamble, as the random access preamble information is subjected to frequency hopping transmission, frequency hopping reception or detection in the frequency domain, the frequency domain diversity gain is obtained, and the effective improvement of the uplink coverage is realized.

Additional features and corresponding advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a flowchart of a method for processing frequency hopping of Preamble provided by the present invention;

Fig. 2 is a schematic diagram of a time domain structure of a RACH Preamble in a first embodiment of the present invention;

Fig. 3 is a schematic diagram of a RACH Preamble time domain structure with a repetition or transmission number of 2 in the first embodiment of the present invention;

fig. 4 is a schematic diagram of a RACH Preamble time domain structure with a repetition or transmission number of 2 and using an evolution mode 1-a in the first embodiment of the present invention;

fig. 5 is a schematic diagram of a RACH Preamble time domain structure with a repetition or transmission number of 2 and using an evolution mode 1-B in the first embodiment of the present invention;

Fig. 6 is a schematic diagram of RACH Preamble time domain structure in which the number of repetition or transmission is 2 and GT or CP between Preamble sequences is omitted in the first embodiment of the present invention;

fig. 7 is a schematic diagram of RACH Preamble time domain structure with 2-a evolution mode, in which the number of repetition or transmission is 2 and GT or CP between Preamble sequences is omitted in the first embodiment of the present invention;

Fig. 8 is a schematic diagram of RACH Preamble time domain structure with 2-B evolution mode, wherein the number of repetition or transmission is 2, and GT or CP between Preamble sequences is omitted;

fig. 9 is a schematic diagram of RACH Preamble time domain structure in which the number of repetition or transmission is 2 and GT and CP between Preamble sequences are omitted in the first embodiment of the present invention;

Fig. 10 is a schematic diagram of RACH Preamble time domain structure with repetition or transmission frequency of 2 and omitting GT and CP between Preamble sequences and using evolution 3-a in the first embodiment of the present invention;

fig. 11 is a schematic diagram of RACH Preamble time domain structure with repetition or transmission frequency of 2, omitting GT and CP between Preamble sequences and using evolution 3-B in the first embodiment of the present invention; fig. 12 is a schematic diagram of a frequency hopping pattern based on Preamble index in the third embodiment of the present invention;

Fig. 13 is a schematic diagram of a frequency hopping pattern based on UE ID in the fourth embodiment of the present invention;

fig. 14 is a diagram of a second exemplary frequency hopping pattern based on UE ID in a fourth embodiment of the present invention;

Fig. 15 is a schematic diagram of a frequency hopping pattern based on fixed offset in the fourth embodiment of the present invention;

Fig. 16 is a diagram of two schematic diagrams of a frequency hopping pattern based on fixed offset in the fifth embodiment of the present invention;

fig. 17 is a schematic diagram of a frequency hopping pattern based on prime numbers a and b in a fifth embodiment of the present invention;

FIG. 18 is a schematic diagram of a frequency hopping pattern for six sub-band in-band frequency domain resource selection in accordance with an embodiment of the present invention;

Fig. 19 is a schematic diagram of a Preamble sending device according to a thirteenth embodiment of the present invention;

Fig. 20 is a schematic diagram of a terminal according to a fourteenth embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages solved by the present invention more apparent, the following embodiments of the present invention will be further described in detail by referring to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In order to solve the problem of insufficient uplink coverage, the present embodiment provides a method for processing frequency hopping of a Preamble, please refer to fig. 1, fig. 1 is a flowchart of a method for processing frequency hopping of a Preamble, which includes the following steps:

s101: under the condition of Preamble frequency hopping enabling, performing Preamble transmission on resources designated by a frequency hopping pattern or rule according to the preset frequency hopping pattern or rule; and/or the number of the groups of groups,

S102: and receiving or detecting the Preamble on the resources designated by the frequency hopping pattern or rule according to the frequency hopping pattern or rule which is the same as the frequency hopping transmission.

The preset hopping pattern in the present invention is determined by at least one of the following configuration parameters of PRACH (physical random access channel):

Initiation PRBn _offset of PRACH frequency domain resources;

A subcarrier spacing SCS;

Preamble format；

preamble repetition or transmission number N;

Repeating or transmitting the Preamble for N times;

the number of symbols occupied by the Preamble;

Frequency hopping time domain granularity Y;

Number of PRACH frequency domain resources K;

A frequency hopping bandwidth;

Fixing the offset in the frequency domain; the offset granularity is PRACH frequency domain resource granularity, or group granularity.

Mirror image enabling;

frequency hopping enabling;

A correspondence between Preamble index and PRACH resources;

Prime numbers a and b, namely a and b are prime numbers of K;

The number of PRACH resource groups (i.e., the number of subbands);

the number of PRACH resources contained within the PRACH resource group (i.e., the number of PRACH resources contained in the subband);

The determination of at least one of the above parameters is performed in the following manner: predefined, higher layer RRC signaling, RMSI, physical layer DCI signaling.

Embodiment one: specifically, a time domain structure of transmitting/repeating a Preamble N times is introduced.

The embodiment provides a method for transmitting a Random access channel (Random ACCESS CHANNEL, RACH) Preamble N times or repeating the same N times. Wherein, the N transmissions of the RACH Preamble, or the N repetitions, may be continuous in the time domain, or may also be discontinuous (may also be referred to as discrete in the time domain). N is a positive integer greater than or equal to 1.

The structure of the random access Preamble in the time domain is as follows: cyclic Prefix (CP) + Preamble sequence + Guard Time (GT). As shown in fig. 2, fig. 2 is a time domain structure of the RACH Preamble shown in the present invention. CP and GT are introduced to prevent the Preamble portions of the cell center and edge UEs on adjacent time domain resources (e.g., time domain resources may be at least one of subframes, slots, mini-slots, symbols) from being mutually aliased due to different air transmission delays.

According to different coverage requirements (herein, the requirements of other scenarios are not excluded), a method of N transmissions, or repeating N RACH preambles is proposed, and several RACH Preamble repetition transmissions, or a time domain structure of multiple (e.g., N) transmissions, are given below:

Mode 1: the Preamble sequence is preceded by a CP, the Preamble sequence is followed by a GT, and the number of transmissions or repetitions is N.

For example, the RACH Preamble is repeated for a number of times, or the RACH Preamble is transmitted for a number of times of 2, and the RACH Preamble time domain structure thereof is shown in fig. 3 as a schematic diagram of the RACH Preamble time domain structure for a number of times of repetition or transmission of 2.

Depending on the mode 1, n transmissions, or Preamble sequence different or identical employed in the repetition, this may result in different transmission, and/or detection, or reception modes. The following two variants can be developed by the above structure:

mode 1-A: the Preamble sequence is preceded by a CP, the Preamble sequence is followed by a GT, and the number of transmissions or repetitions is N, and the Preamble sequences are identical.

For example, the RACH Preamble is repeated for a number of times, or the RACH Preamble is transmitted for a number of times of 2, and the Preamble Sequence is the same (e.g., sequence X). The RACH Preamble time domain structure is shown in fig. 4, and is a schematic diagram of the RACH Preamble time domain structure with the repetition or transmission frequency of 2 and the same Preamble sequence.

Mode 1-B: the Preamble sequence is preceded by a CP, the Preamble sequence is followed by a GT, and the number of transmissions or repetitions is N, and the Preamble sequences are different.

For example, the RACH Preamble is repeated for a number of times or the RACH Preamble is transmitted for a number of times of 2, and the Preamble sequences are different (for example, sequence X, sequence Y). The RACH Preamble time domain structure is shown in fig. 5, which is a schematic diagram of RACH Preamble time domain structures with repetition or transmission times of 2 and different Preamble sequences.

Mode 2: the Preamble sequence is transmitted before the initial transmission, the Preamble sequence transmitted at the end is transmitted after the last transmission, the intermediate preambles are transmitted with GT only, or the CP, and the number of times of transmission or the number of times of repetition is N.

For example, the RACH Preamble number is repeated, or the RACH Preamble number is transmitted to be 2, and GT or CP between Preamble sequences is omitted, and the RACH Preamble time domain structure thereof is repeated or transmitted to be 2, as shown in fig. 6, and the RACH Preamble time domain structure of GT or CP between Preamble sequences is omitted.

Depending on the manner 2, n transmissions, or Preamble sequence different or identical employed in the repetition, this may result in different transmission, and/or detection, or reception manners. The following two deformed structures can be evolved by the above structure:

Mode 2-A: the Preamble sequence is transmitted before the initial transmission, the Preamble sequence transmitted at the end is transmitted after the last transmission, the Preamble is transmitted at the middle, and only the GT is provided between the preambles, or the CP, and the number of times of transmission or the number of times of repetition is N, and the Preamble sequences are the same.

For example, the RACH Preamble is repeated for a number of times, or the RACH Preamble is transmitted for a number of times of 2, and the Preamble Sequence is the same (e.g., sequence X). The RACH Preamble time domain structure is shown in fig. 7, and is a schematic diagram of the RACH Preamble time domain structure with the repetition or transmission number of 2, only GT or CP between preambles and identical Preamble sequence.

Mode 2-B: the Preamble sequence is transmitted before the initial transmission, the Preamble sequence transmitted at the end is transmitted after the last transmission, the Preamble is transmitted at the middle, and only the GT is provided between the preambles, or the CP, and the number of times of transmission or the number of times of repetition is N, and the Preamble sequences are different.

For example, the RACH Preamble is repeated for a number of times or the RACH Preamble is transmitted for a number of times of 2, and the Preamble sequences are different (for example, sequence X, sequence Y). The RACH Preamble time domain structure is shown in fig. 8, and is a schematic diagram of RACH Preamble time domain structure with repetition or transmission times of 2, only GT or CP between preambles and different Preamble sequences.

Mode 3: the Preamble sequence is transmitted before the initial transmission, the Preamble sequence transmitted at the end is transmitted after the last transmission, the GT is omitted between the preambles in the middle, and the CP, and the number of times of transmission or the number of times of repetition is N.

For example, the RACH Preamble number is repeated, or the RACH Preamble number is transmitted to be 2, and GT and CP between Preamble sequences are omitted, and the RACH Preamble time domain structure thereof is repeated or transmitted to be 2 as shown in fig. 9, and RACH Preamble time domain structure schematic diagram of GT and CP between Preamble sequences is omitted. This structure is similar to the Preamble format 2 and format 3 (e.g., preamble is repeated 2 times) in the existing LTE, except that resources occupied in the time domain are different, for example, preambleformat in LTE uses a subframe as a basic unit, and the Preamble format in NR may be a slot, or M symbols (M is greater than or equal to 1, a small fish is equal to 6/7, or 12/14, which may also be referred to as a mini-slot) are basic units.

Depending on the manner 3, n transmissions, or Preamble sequence different or identical employed in the repetition, this may result in different transmission, and/or detection, or reception manners. The following two deformed structures can be evolved by the above structure:

mode 3-A: the Preamble sequence is transmitted before the initial transmission, the Preamble sequence transmitted at the end is transmitted after the last transmission, the GT is omitted between the preambles in the middle, and the CP, and the number of times of transmission or the number of times of repetition is N, and the Preamble sequences are the same.

For example, the RACH Preamble is repeated for a number of times, or the RACH Preamble is transmitted for a number of times of 2, and the Preamble Sequence is the same (e.g., sequence X). The RACH Preamble time domain structure is shown in fig. 10, and is a schematic diagram of the RACH Preamble time domain structure with the repetition or transmission number of 2, omitting GT and CP between preambles and identical Preamble sequences.

Mode 3-B: the Preamble sequence is transmitted before the initial transmission, the Preamble sequence transmitted at the end is transmitted after the last transmission, the GT is omitted between the preambles in the middle, and the CP, and the number of times of transmission or the number of times of repetition is N, and the Preamble sequences are different.

For example, the RACH Preamble is repeated for a number of times or the RACH Preamble is transmitted for a number of times of 2, and the Preamble sequences are different (for example, sequence X, sequence Y). The RACH Preamble time domain structure is shown in fig. 11, and is a schematic diagram of RACH Preamble time domain structure with repetition or transmission times of 2, omitting GT and CP between preambles and having different Preamble sequences.

In this embodiment, the Preamble time domain structure, and/or the Preamble sequence, and/or the number of symbols occupied by the Preamble, and/or the number of repetition/transmission times of the Preamble may be obtained by at least one of the following manners: the configuration is predefined by higher layer RRC signaling configuration or by physical layer DCI signaling (e.g., PDCCHorder) configuration or by notification of remaining system Information (REMAINING SYSTEM Information, RMSI).

Embodiment two: the time domain resource of the Preamble and the frequency domain resource division are specifically described.

In this embodiment, at least one of time domain resources and frequency domain resources used for transmitting information (e.g., preamble) is given.

The frequency domain resources used to transmit information (e.g., preamble), or a set of frequency domain resources, may be determined by one of:

Mode one: frequency domain resources occupied by transmission information (e.g., preamble) according to frequency domain offset n _offset Subcarrier spacing SCS, frequency domain resourceAt least one of the number of (d) and the bandwidth.

Mode two: determined according to a predetermined division. Dividing bandwidth (e.g. frequency hopping bandwidth, system bandwidth) into K pieces of size according to preset modeIs a resource unit of (1); or the resource with the length of the frequency hopping bandwidth is divided into K resources with the size of/>, according to the frequency domain offset n _offse ^t Is a resource unit of (a).

The divided K available frequency domain resources, or resources in the frequency domain resource set, are marked as #0, #1, #2, #3, # K-1 in sequence from the minimum to the maximum according to the PRB index number. Wherein, the subcarrier intervals are different, and the corresponding transmission information occupies the frequency domain resourceDifferent. For example, for a subcarrier spacing of 1.25KHz, the frequency domain resources/>, which are occupied by its transmitted information (e.g., preamble)(I.e., the number of occupied PRBs) is 6 (which may also be correspondingly translated into the number of occupied REs, or, the number of subbands). And for a subcarrier spacing of 5KHz, the frequency domain resources occupied by the transmitted information (e.g., preamble)(I.e., the number of occupied PRBs) is 24. And (3) injection: the subcarrier spacing may be one of 1.25kHz, 2.5kHz, 5kHz, 7.5kHz, 10kHz, 15kHz, 20kHz, 30kHz, 60kHz, 120kHz, 240 kHz. The subcarrier spacing may be summarized as 1.25×n, or 15×n, where n is an integer greater than or equal to 1.

Further, the frequency domain offset n _offset is the frequency domain resource occupied by the transmission information (e.g., preamble)Subcarrier spacing SCS, frequency domain resourceAt least one of the number and bandwidth of (a) may be obtained by at least one of: the configuration is predefined by higher layer RRC signaling configuration or by physical layer DCI signaling (e.g., PDCCH order) configuration or by Remaining system information (Remaining SystemInformation, RMSI) notification configuration.

The starting PRB location on the frequency domain may be determined as follows:

Case one: for the case where PRACH resources are contiguous in the frequency domain, the starting PRB positions in the frequency domain are calculated as follows:

Equation one: Or;

Formula II:

Wherein, formula one represents the frequency domain starting position of PRACH resources determined from the direction of low frequency to high frequency in turn. And formula two is the frequency domain starting position determined by the direction of PRACH resources from high frequency to low frequency in sequence. s is the subcarrier spacing; n _offset is the offset in the frequency domain of the configuration, n _offset is greater than or equal to 0 and less than or equal to Is a value of (2). Here, n _offset may refer to an offset of PRBs; /(I)The number of PRBs corresponding to the hop bandwidth or the number of PRBs corresponding to the system bandwidth can be represented; /(I)Representing the PRB number occupied by PRACH resources corresponding to the subcarrier spacing of 1.25 kHz; ki is the index of PRACH resources in the frequency domain, the value range is [0, K-1], and K is the number of PRACH resources in the frequency domain.

And a second case: for the case where PRACH resources are distributed at both ends of the bandwidth or frequency hopping bandwidth ("low-high frequency location interleaving"), the starting PRB locations on the frequency domain are calculated as follows:

And a third case: for the case where PRACH resources are distributed at both ends of the bandwidth or frequency hopping bandwidth ("part low, part high frequency location") the starting PRB location on the frequency domain is calculated as follows: m is the number of PRACH contiguous resources distributed at one end of the bandwidth Hu Tiao frequency bandwidth. M is half of K.

The length of the Preamble sequence described in embodiment one may be equal or unequal. The Preamble may consist of at least one of the following in the time domain: q subframes, Q slots, Q symbols, Q mini-slots (mini-slots, which are made up of P OFDM symbols, P is a positive integer greater than or equal to 1, and/or less than or equal to 6/7/12/14). Q is a positive integer greater than or equal to 1.

Before introducing the frequency domain hopping pattern, the concept of time domain granularity of the lower hopping is introduced. The time domain granularity of the frequency hopping means that when a specific signal/channel (e.g., preamble) hops, the frequency domain resource locations on the Y time domain resources are the same. For example, Y is 2, the Preamble is repeated, or the number of transmissions is 4, and when the third Preamble starts to be transmitted, frequency hopping is implemented in the frequency domain. That is, the frequency domain positions corresponding to the first Preamble and the second Preamble are the same, the frequency domain positions corresponding to the third Preamble and the fourth Preamble are the same, but the frequency domain of the first Preamble and the second Preamble corresponding to the time domain granularity of 2 is different from the frequency domain positions corresponding to the third Preamble and the fourth Preamble, that is, the frequency domain is hopped. Similarly, Y may also represent that the frequency domain resource locations on Y OFDM symbols, or subframes, or slots are the same.

The following embodiment will give a transmission method of transmitting/repeating a Preamble N times, i.e., design of a hopping pattern. Wherein, the N transmissions of the RACH Preamble, or the N repetitions, may be continuous in the time domain, or may also be discontinuous (may also be referred to as discrete in the time domain). N is a positive integer greater than or equal to 1.

Embodiment III: specifically, a method for determining a frequency hopping position of a frequency domain by using Preamble index is described.

The embodiment provides a frequency hopping pattern method, namely, determining the frequency domain position of frequency hopping according to Preamble index sent by UE. The Preamble index may be an index of a previous or last transmission Preamble, or a first Preamble index in a time domain granularity Y of a previous or last transmission Preamble, or a last Preamble index in a time domain granularity Y of a previous or last transmission Preamble, or a Preamble index with a maximum Preamble index in a time domain granularity Y of a previous or last transmission Preamble, or a Preamble index with a minimum Preamble index in a time domain granularity Y of a previous or last transmission Preamble. And (3) injection: the method in this embodiment is based on the premise that frequency hopping is enabled, where the frequency hopping is based on between preambles transmitted continuously or between Preamble formats transmitted continuously.

Frequency domain position of frequency hopping, which is calculated with the frequency domain position of frequency hopping represented by the resource index: the resulting value is modulo by Preambleindex with the number of PRACH resources K. The method is characterized by comprising the following steps: f= (Preamble index) mod K. Currently, the number of Preamble sequences is 64 for each cell. Namely, the value range of the Preamble index is [0,63] or [1,64]. Not generally, assuming that the number of Preamble sequences is NUM, the range of values for Preamble index is [0, NIM-1] or [1, NUM ].

For example, assuming that the number of times N of consecutively or repeatedly transmitting preambles by the UE in the time domain is 2, the frequency domain resource for transmitting the Preamble for the first time is a resource location corresponding to the frequency domain resource index 0, index used for transmitting the Preamble for the first time is 34, the number of prach resources K is 6, the time domain hopping granularity Y is 1 (in units of the number of preambles, or in units of time domain resources occupied by the preambles (for example, the number of symbols occupied by the preambles in turn, or the number of slots, or the number of subframes), where Y is 1 represents one Preamble, in the manner described in the first embodiment, the UE transmits the frequency domain location f=34 mod 6=4 of the second time Preamble. That is, the frequency domain position of the second Preamble sent by the UE is the resource corresponding to the PRACH resource index of 4. The index of the Preamble transmitted for the second time may be the same as or different from the index of the previous or preceding Preamble. As shown in fig. 12, fig. 12 is a schematic diagram of determining a frequency domain position of a next Preamble transmission based on an index of a previous Preamble provided in the present invention. Here, PRACH frequency domain resources are sequentially numbered in the order of PRB numbers or PRACH available resource numbers from lowest to highest.

In order to make the PRACH frequency domain resources used by the UEs when transmitting the Preamble next different, it is necessary to limit the Preamble index used by the UEs that transmit the Preamble on the same time and/or frequency domain resources at the same time. Namely, a corresponding system between the Preamble and the PRACH resource needs to be designed, and the specific mode is as follows:

Method 1: the Preamble sequence is divided into K groups in the following dividing manner: (Preamble index) modK has values of 0,1,2,3, respectively. Wherein, the value range of the Preamble index is [0, NUM-1] or [1, NUM ].

For example, assuming that the number of Preamble sequences is the value range [0,63] or [1,64] of 64,Preamble index and K is 6, the correspondence between the Preamble index divided according to the value obtained by (Preamble index) mod 6 and the PRACH frequency domain resource index is shown in table 1. In order to facilitate the base station to distinguish or detect that multiple UEs transmit preambles, the Preamble index transmitted by multiple UEs on the same PRACH resource should come from different Preamble index sets or groups.

TABLE 1

Method 2: dividing NUM number of Preamble index intoAnd a group in which the obtained values are rounded up. The number of Preamble indices contained within each group is K. The value of the Preamble index is [0, NIM-1] or [1, NUM ]. Here, it is assumed that/>, in order from small to large in indexThe ones are grouped into a set or group of Preamble indices. In order to facilitate the base station to distinguish or detect that multiple UEs transmit preambles, the Preamble index transmitted by multiple UEs on the same PRACH resource should be from the same Preamble index set or group.

For example, the number of preambles is 64, the number of PRACH frequency domain resources is 6, and each group contains 6 Preamble sequences, and the PRACH frequency domain resources can be divided into 11 subgroups. The obtained groups or sets are sequentially divided into: preamble index #0 to Preamble index #5 corresponding group/set index 0,Preamble index#6 to Preamble index #11 corresponding group/set index 1,Preamble index#12 to Preamble index #17 corresponding group/set index 2,Preamble index#18 to Preamble index #23 corresponding group/set index 3, and so on, preamble index #60 to Preamble index #63 corresponding group/set index 10. As shown in table 2.

TABLE 2

As can be seen from the above, the Preamble index can be divided into K columnsThe number of rows, or,A matrix of columns K rows. The Preamble index is written row by row or written column by column in sequence according to the ascending order of the Preamble index. For the column KIn table 2, in order to facilitate the base station to distinguish or detect multiple UEs from each other through the frequency domain dimension, the Preamble index transmitted by multiple UEs on the same PRACH resource should come from the same Preamble index set or group, i.e. from the Preamble index in the same row, and each UE adopts a different Preamble index in the same row or group or the same set. In addition, other manners may achieve the above effect, for example, the Preamble index #0 may be divided into a group or a set with any one of Preamble index#1,Preamble index#7,Preamble index#13,Preamble index#19,Preamble index#25,Preamble index#31,Preamble index#37,Preamble index#43,Preamble index#49,Preamble index#55,Preamble index#61, any one of ,Preamble index#2,Preamble index#8,Preamble index#14,Preamble index#20,Preamble index#26,Preamble index#32,Preamble index#38,Preamble index#44,Preamble index#50,Preamble index#56,Preamble index#62, any one of ,Preamble index#3,Preamble index#9,Preamble index#15,Preamble index#21,Preamble index#27,Preamble index#33,Preamble index#39,Preamble index#45,Preamble index#51,Preamble index#57,Preamble index#63, any one of ,Preamble index#4,Preamble index#10,Preamble index#16,Preamble index#22,Preamble index#28,Preamble index#34,Preamble index#40,Preamble index#46,Preamble index#52,Preamble index#58, and any one of ,Preamble index#5,Preamble index#11,Preamble index#17,Preamble index#23,Preamble index#29,Preamble index#35,Preamble index#41,Preamble index#47,Preamble index#53,Preamble index#59, and so on, and similarly ,Preamble index#6,Preambleindex#12,Preamble index#18,Preamble index#24,Preamble index#30,Preambleindex#36,Preamble index#42,Preamble index#48,Preamble index#54,Preambleindex#60 may also employ the manner of constructing the group or the set of Preamble index # 0. And are not listed here one by one.

Further expanding, according to the Preamble index and the group number, the group position of the frequency hopping is determined. Also mirror image means may be introduced within the group. Wherein, the division of the group is: on the frequency domain, assuming that the number of PRACH frequency domain resources is K, the PRACH frequency domain resources are numbered as resources #0, #1, #2, # K-1 in sequence from the lowest PRB index to the highest PRACH index. The number of RBs occupied by each PRACH resource in the frequency domain is related to the subcarrier spacing, for example, the subcarrier spacing is 1.25kHz, and 6 PRBs are occupied for one PRACH resource. When the sub-carriers are spaced by other values, the number of PRBs occupied by the corresponding PRACH resources can be obtained according to a certain scaling scale. Assume that the time domain hopping granularity Y is 1. Dividing K PRACH frequency domain resources into M groups, wherein the number of PRACH resources contained in each group is K/M. The M groups are numbered 0,1,2,3 sequentially from the smallest to the largest according to the PRACH frequency domain resource index.

Embodiment four: for one application based on the method described in the third embodiment, the problem of detection ambiguity is mainly solved.

This embodiment is an application of the method described in embodiment three. Namely, the problem of detection blurring can be solved or alleviated to a certain extent by determining the position of the frequency hopping frequency domain through the Preamble index. The manner in this embodiment is not limited to solving this problem.

Assuming that the time domain structure adopted by the UE for transmitting the Preamble is CP before RACH sequence, the sequences repeated/transmitted N times are different, and GT is introduced at the end of the repeated or transmitted N times sequence. Wherein N is a positive integer greater than or equal to 1. N may be determined by one of the following: predefined, physical layer DCI signaling, higher layer RRC signaling, RMSI. Wherein, N may also be triggered by PDCCH order, and/or indicate the number of Preamble transmissions/repetitions. Assume that the number of repetition/transmission Preamble times N is 2. For such a time domain structure, a detection ambiguity problem will occur. The reason is that the detection under this structure is divided into two phases, each of which detects a sequence. If multiple UEs transmit simultaneously, e.g., UE1 transmits a first sequence a, a second sequence B, and UE2 transmits a first sequence C, a second sequence D, the base station may detect sequence a during the first phase detection, and sequence C, and the base station detects sequence B during the second phase detection, and sequence D. At this time, the base station cannot determine which of the sequences AB, AD, CB, CD the UE1 transmits. The above-described problems also exist for the detection of UE 2. Here, assume that the time domain hopping granularity y=1.

For the above problems, the corresponding solutions are different in different situations, and specifically as follows:

Case 1: assuming that the first sequences of UE1 and UE2 are different, the frequency domain location of the second sequence of the different UE is determined according to a certain relationship by the first Preamble Index. The certain relation may be Preamble Index mod K, where K is the number of frequency domain resources for transmitting the Preamble. For a selection manner of Preamble index adopted by UE1 and UE2 in the same transmission, please refer to method 1 or method 2 in the third embodiment, and details are not repeated here.

For example, the Preamble index of the first sequence of UE1 is 12, the first sequence Preambleindex of UE2 is 40, K is 6, UE1 is determined in the manner of (Preamble index) mod K, and UE2 transmits the frequency domain location of the second sequence. Namely, the UE1 transmits the second sequence on the frequency domain resource corresponding to the value 0 obtained by the frequency domain position 12mod 6 transmitted by the second sequence of UE1, i.e. the first frequency domain resource; the value 4 obtained by the frequency domain position 40mod 6 transmitted by the second sequence of UE2 corresponds to the frequency domain resource, i.e. the second sequence is transmitted by UE2 on the fifth frequency domain resource, as shown in fig. 13. Namely, the UE1 and the UE2 obtain different frequency domain positions for transmitting the second sequence according to a certain relationship through the Preamble index, so that the base station can determine which Preamble is transmitted by the UE when it is detected through at least one of the Preamble index and the frequency domain position transmitted by the second sequence.

In order to guarantee the feasibility of the above method, the Preamble Index adopted by UE1 and UE2 needs to be restricted to come from different sets, i.e. the Preamble Index of UE1 and UE2 cannot take the same value as the value obtained after K is modulo. Alternatively, the Preamble indices should be from different sets, and the frequency domain positions corresponding to the obtained values after processing according to the Preamble Index and the specific relationship in each set are different.

In addition, the frequency domain hopping position of the first sequence may also be determined according to the Preamble index of the second sequence. This approach may also solve the problem of detection ambiguity.

Case 2: assuming that the first sequences of UE1 and UE2 are identical, the detection ambiguity problem can be solved by means of UE IDs. One way is as follows: the frequency domain location of the second sequence is determined using the UE ID. I.e. detection ambiguity is resolved by frequency domain location differences. Another way is to establish a relationship with the Preamble sequence using the UE ID.

The specific method comprises the following steps: by establishing a correspondence between the UE ID and the frequency domain position transmitted by the latter sequence (or the former sequence). The frequency domain position of the second sequence is determined, for example, by means of the UE ID mod K. Assuming that UE1 has a UE ID of 79, UE2 has a UE ID of 369, and k has a value of 6, the frequency domain position 79mod 6 of UE1 where the second sequence is transmitted is 1, and the frequency domain position 369mod 6 of UE2 where the second sequence is transmitted is 3, as shown in fig. 14. I.e. by the frequency domain position of the second sequence, so that the base station can distinguish whether the Preamble transmitted by UE1 or UE2 is detected. In order to prevent that different UEs obtain the situation that the corresponding frequency domain positions of the values are the same according to a specific relation, it is suggested that the IDs of different UEs with the same Preamble index and/or the same time domain and/or frequency domain positions avoid the IDs of the same frequency domain positions after being processed according to the specific relation. I.e. the IDs of these UEs should differ according to the specific relationship handling frequency domain locations. Alternatively, the UEs should be from different sets, and the frequency domain positions corresponding to the obtained values are different after the UEs in the respective sets are processed according to the UE IDs and the specific relationships.

For case two, another approach is to: different frequency domain offsets (for example, offset directions are consistent) are configured for a plurality of UEs which transmit simultaneously, or the same offset is configured, and the offset directions are different, so that different frequency domain positions of the second Preamble transmission are realized. Thereby solving the problem of detection blurring. For example, the frequency domain offsets of UE1 and UE2 are the same, but the direction of the offset is different, e.g., offset 1, while UE1 is offset 1 to the PRACH frequency domain resource index increment and UE2 is offset 1 to the PRACH frequency domain resource index decrement. Or UE1 and UE2 are configured with different offsets, e.g., UE1 is offset 2 to the PRACH frequency domain resource index increment direction and UE2 is offset 3 to the PRACH frequency domain resource index increment direction. Preferably, the offset may be an annular offset.

Whether the same Preamble index or different Preamble indexes are adopted by a plurality of UEs transmitted simultaneously, the problem of detection ambiguity can be solved to a certain extent by one of the following modes.

Mode one: and adopting a mode that Preamble index corresponds to r PRACH resources. Based on this, in case that the same Preamble index is adopted for different UEs, one of r PRACH resources may be configured separately. Similarly, the manner of using different Preamble index for different UEs may also be by allocating one of r PRACH resources to different Preamble index. This way the probability of detecting blurring can be reduced to some extent.

For example, the value obtained for (Preamble index) mod (K/r) corresponds to the PRACH frequency domain resource index corresponding to Ki mod r. Ki is in the range of [0, K-1]. For example, the Preamble index is 8,K, the total number of PRACH frequency domain resources is 4, r is the number of PRACH frequency domain resources corresponding to the Preamble is 2, that is, according to the above relation, 8mod (4/2) =0, that is, the PRACH frequency domain resources corresponding to the value of Ki mod r obtained as 0, that is, PRACH frequency domain resource indexes 0 and 2. If the number of UEs transmitted simultaneously is 2, different Preamble index conditions are adopted for two UEs, the maximum or minimum index can be corresponding to the position with the maximum or minimum index in the candidate PRACH resource set or the frequency domain position corresponding to the preset mode, or the frequency domain position corresponding to the physical layer DCI signaling indication, or the higher layer RRC signaling indication, or RMSI indication corresponding to the frequency domain position.

The following embodiments will mainly give a method of determining a frequency domain position of a frequency hopping from a frequency domain position dimension, or a frequency hopping pattern.

Fifth embodiment:

The present embodiment provides a way to fix the frequency hopping pattern of the offset.

On the frequency domain, assuming that the number of PRACH frequency domain resources is K, the PRACH frequency domain resources are numbered as resources #0, #1, #2, # K-1 in sequence from the lowest PRB index to the highest PRACH index. The number of RBs occupied by each PRACH resource in the frequency domain is related to the subcarrier spacing, for example, the subcarrier spacing is 1.25kHz, and 6 PRBs are occupied for one PRACH resource. When the sub-carriers are spaced by other values, the number of PRBs occupied by the corresponding PRACH resources can be obtained according to a certain scaling scale. Assume that the time domain hopping granularity Y is 1.

The frequency hopping pattern mode of the fixed offset is calculated as follows: (i+a×offset) modK. Wherein, the value of a is 0 or 1.a is 0 and no frequency hopping, and a is 1 and frequency hopping. i is the frequency domain resource position index of the previous or last or initial transmission Preamble, and the value of i is [0, K-1]. The offset is an offset value in the PRACH frequency domain resource unit, and the offset value is a positive integer greater than or equal to 0.

For example, assume that the number of times N of continuously or repeatedly transmitting preambles in the time domain by the UE is 2, the frequency domain resource for which the Preamble is transmitted for the first time is the resource position corresponding to the frequency domain resource index 0, i.e., i is 0, the number of PRACH resources K is 6, the time domain hopping granularity Y is 1, where Y is 1 represents one Preamble, offset is 4, and a is +1, and at this time, the frequency domain resource index according to (i+a×offset) modK = (0+1×4) mod 6=4, i.e., the frequency domain resource index of the frequency hopping is the frequency domain resource position corresponding to the PRACH resource index 4. As shown in fig. 15. In this example, Y is in units of the number of preambles, and Y may also be in units of the time domain resources occupied by the preambles (e.g., the number of symbols, or the number of slots, or the number of subframes occupied by the preambles in turn).

Or a fixed offset frequency hopping pattern mode, which is calculated by: i+a×offset, or i-a×offset. In this way, it is actually a way of exhibiting a "circular" cyclic offset. Wherein, the value of a is 0 or 1.a is 0 and no frequency hopping, and a is 1 and frequency hopping. In addition, a also represents a "+" positive value, or a "-" negative value. a is positive and indicates a direction according to the maximum (forward) of the frequency domain resource index, and a is negative and indicates a direction according to the minimum (reverse) of the frequency domain resource index. i is the frequency domain resource position index of the previous or last Preamble transmission, and the value of i is [0, K-1]. The offset is an offset value in units of frequency domain resources, and the offset value is a positive integer greater than or equal to 0.

For example, assuming that the number N of times the UE continuously or repeatedly transmits the Preamble in the time domain is 2, the frequency domain resource for the first time of transmitting the Preamble is the resource position corresponding to the frequency domain resource index 0, i.e., i is 0, the number K of PRACH resources is 6, the time domain hopping granularity Y is 1, where Y is 1 represents one Preamble, offset is 4, and a is +1, at this time, according to i+a×offset=0+1×4=4, i.e., starting from the frequency domain resource position of the PRACH frequency domain resource index 0, offset by 4 in the direction of the maximum (forward direction) of the frequency domain resource index, the corresponding PRACH frequency domain resource is the frequency domain resource position of the frequency hopping (e.g., PRACH resource index 4). However, if a is-1, the frequency hopping position is a PRACH frequency domain resource (e.g., PRACH resource index 2) corresponding to the direction offset 4 of the smallest (reverse) frequency domain resource index from the frequency domain resource position of PRACH frequency domain resource index 0, as shown in fig. 16. In this example, Y is in units of the number of preambles, and Y may also be in units of time domain resources occupied by the preambles (e.g., the number of symbols occupied by the preambles in turn, or the number of slots, or the number of subframes)

One special case is: for Preamble transmission, or the number of repetitions is greater than 2, the time domain hopping granularity Y is smaller than the Preamble transmission or the number of repetitions N, and the frequency domain resource position of the frequency hopping is determined based on the frequency domain resource position of the initial transmission Preamble, when the UE performs the h-th frequency hopping, the frequency domain resource position (i.e., index) of the frequency hopping is (i+a× (h-1) ×offset) modK, or (i-a× (h-1) ×offset) modK, or i+a× (h-1) ×offset, or i-a× (h-1) ×offset). The meaning of the parameters in the formula is the same as that of the formula, and the description is omitted here. Briefly, the determination of the location of the frequency hopping frequency domain resources depends primarily on the number of PRACH frequency domain resources configured based on the frequency domain location of the previously transmitted Preamble and the offset value. Alternatively, the current-period hopping frequency domain position may be determined by a fixed offset based on the previous hopping frequency position, for example, i+1= (i+a×offset) modK, or i+1=i+a×offset, or i+1=i-a×offset.

For example, assuming that the number of times N of continuously or repeatedly transmitting the Preamble in the time domain by the UE is 4, the frequency domain resource for the first time of transmitting the Preamble is a resource location corresponding to the frequency domain resource index 0, i.e., i is 0, the number of PRACH resources K is 6, the time domain hopping granularity Y is 1, where Y is 1 denotes one Preamble, offset is 2, each time of hopping the frequency location is based on the initial Preamble to transmit the corresponding PRACH resource index, a is 1, and according to the formula of i+a× (h-1) ×offset, the frequency domain resource locations for the first time, the second time, and the third time of hopping are PRACH frequency domain resource indexes 2,4,0 in sequence.

If the frequency-hopping resource location is based on the previous time, or the frequency-domain resource index corresponding to the Preamble is transmitted in sequence recently, it may be calculated and obtained according to the method or formula mentioned in the present embodiment.

The fixed offset, or whether frequency hopping enables a, may be determined by at least one of: predefined, higher layer RRC signaling, RMSI, physical layer DCI signaling.

Further, the frequency hopping enabling switch a may not be introduced into the formula in this embodiment.

Further extensions of the method described in this embodiment may replace the fixed offset with a random function. Such as a random function rand, a binomial distribution function, etc.

Example six:

the present embodiment provides a frequency hopping pattern scheme.

On the frequency domain, assuming that the number of PRACH frequency domain resources is K, the PRACH frequency domain resources are numbered as resources #0, #1, #2, # K-1 in sequence from the lowest PRB index to the highest PRACH index. The number of PRBs occupied by each PRACH resource in the frequency domain is related to the subcarrier spacing, for example, the subcarrier spacing is 1.25kHz, and 6 PRBs are occupied for one PRACH resource. When the sub-carriers are spaced by other values, the number of PRBs occupied by the corresponding PRACH resources can be obtained according to a certain scaling scale. Assume that the time domain hopping granularity Y is 1. Dividing K PRACH frequency domain resources into M groups, wherein the number of PRACH resources contained in each group is K/M. The M groups are numbered 0,1,2,3 sequentially from the smallest to the largest according to the PRACH frequency domain resource index. The frequency domain hopping granularity is preferably +j/Mi, or, -j/Mi, mi has a value range of [1, M ], j is an integer less than or equal to Mi, wherein a positive value of "+" indicates a hop toward a larger (forward) direction of the group number and a negative value of "-" indicates a hop toward a smaller (reverse) direction of the group number.

The frequency domain resource location of the frequency hop is determined based on at least one of the group, the inter-group offset, the intra-group offset, and the mirror image. The offset in the group, and the direction of the mirror image, may also have a forward or reverse component.

The group, the inter-group offset, the intra-group offset, whether to mirror, whether to hop frequency, subcarrier spacing, PRACH frequency domain resource number, the corresponding relationship between PRACH resources and groups, time domain hopping granularity Y, PRACH resource initial PRB position, and determining at least one of the offsets of PRACH resources may be determined by at least one of the following manners: predefined, higher layer RRC signaling, RMSI, physical layer DCI signaling.

For example, the UE continuously or repeatedly transmits the Preamble in the time domain, where the time domain hopping granularity Y is 1, where Y is 1 represents one Preamble, the number of frequency domain resources of the PRACH is 10, the 10 PRACH resources are divided into 5 groups, each group includes 2 PRACH frequency domain resources, the PRACH resources transmitted by the Preamble are assumed to be located in the first PRACH resource in the second group (numbered from 0), the frequency hopping is enabled, the frequency domain granularity of the frequency hopping is 1/5 (1/5 represents that the frequency hopping strength is one of the 5 groups, i.e., the granularity is 1), where a positive value represents that the frequency hopping is performed in the direction of increasing the group number (forward direction), a negative value represents that the frequency hopping is performed in the direction of decreasing the group number (reverse direction), and the mirror image, and the intra-group offset is 0, as shown in fig. 17, the frequency domain resource position of the frequency hopping is the second PRACH resource in the third group, i.e., the corresponding PRACH resource index is 7. If not mirrored, the frequency domain resource location of the frequency hopping is the first PRACH resource in the third group, i.e., the corresponding PRACH resource index is 6. The mirroring herein may refer to intra-group mirroring.

It should be stated that the division of the groups is not necessarily limited to the order from small to large according to the PRACH resource index numbers, and the division is performed according to the number of PRACH resources contained in each group, and other groups in which PRACH frequency domain resource indexes are arranged and divided according to a certain rule are also applicable to the division. The manner of dividing the packet described in the present embodiment is not limited.

Further, for the case that the number of times N of continuously or repeatedly transmitting the Preamble in the time domain by the UE is greater than 2, the frequency hopping frequency domain position may be referred to according to the PRACH frequency domain resource index where the Preamble was previously or last or initially transmitted, or the group index where the Preamble is located.

Here, the PRACH frequency domain resource index may be transmitted through the initial Preamble, or at least one of the offset start position of the initial Preamble transmission and the number of PRBs occupied by the PRACH frequency domain resource may determine which group is currently located, and which PRACH resource is within the group.

Embodiment seven:

The present embodiment provides a frequency hopping scheme.

The frequency domain resource of the Preamble transmitted by the UE may be a frequency domain position with respect to the last or previous transmission of the Preamble. Namely, the calculation formula of the frequency hopping position is as follows: f (i+1) = (a×f (i) +b) modK, or (a×f (i) ² +b) modK. Where f (i) is the frequency domain position of the last frequency hopping, or the frequency domain position of the previous Preamble sent, a and b are prime numbers, and K is the number of available frequency domain resources. In addition, f (i) also represents the frequency domain position of the initial transmission Preamble.

For example, assuming that the Preamble transmission number, or the repeat transmission number N is 6, the time domain hopping granularity Y is 1, k is 8, f (i) is a frequency domain resource corresponding to the frequency domain position index of 3, and a, b may be 2, 3,5, or 7. Assuming that a=3 and b=7, the hopping position (a×f (i) +b) modK = (3×3+7) mod 8=0, i.e., the frequency domain resource position index corresponding to the current hopping is 0. Next, the determination of the hopping position is based on the previous hopping position 0, and assuming that the values of a and b are unchanged (at least one of a and b employed in each determination of the hopping position may be changed or unchanged), then (a×f (i) +b) modK = (3× 0+7) mod8=7, that is, the frequency domain position index corresponding to the current hopping frequency is 7. Next, the hopping position is determined, assuming that the values of a and b are unchanged (at least one of a and b employed in each determination of the hopping position may be changed or unchanged), then (a×f (i) +b) modK = (3×7+7) mod 8=4. And by analogy, the resource position indexes corresponding to the frequency domain positions of the 4 th time and the fifth time frequency hopping are 3 and 0 in sequence. As described in fig. 18. In addition, the values of a and b may be changed each time the hopping position is calculated.

Further expansion may be performed according to the group number where the PRACH frequency domain resource is located, and according to f (i+1) = (a×f (i) +b) modK, or (a×f (i) ² +b) modK, where f (i) may also be the group number where the PRACH frequency domain resource where the Preamble was sent last/last time, and K represents the total number of groups. Further, a mirror approach may be introduced within the group. Assuming that the number of PRACH frequency domain resources is K, the resources #0, #1, #2, # K-1 are numbered sequentially in the order of PRB indexes from lowest to highest. The number of PRBs occupied by each PRACH resource in the frequency domain is related to the subcarrier spacing, for example, the subcarrier spacing is 1.25kHz, and 6 PRBs are occupied for one PRACH resource. When the sub-carriers are spaced by other values, the number of PRBs occupied by the corresponding PRACH resources can be obtained according to a certain scaling scale. Dividing K PRACH frequency domain resources into M groups, wherein the number of PRACH resources contained in each group is K/M. The M groups are numbered 0,1,2,3 sequentially from the smallest to the largest according to the PRACH frequency domain resource index.

Alternatively, f (i) may also represent a Preamble Index, which may be the Index of the previous or last transmission of a Preamble, or Preambleindex of one of the transmitted preambles, or the Index employed by the initial transmission of the Preamble. I.e. the frequency domain location of the current hop is determined by (a×f (i) ² +b) modK or (a×f (i) +b) modK.

Further extended, f (i) represents Preamble Index, and the group number of the hopping is determined by the above formula (a×f (i) ² +b) modK or (a×f (i) +b) modK. K represents the total number of groups. Further, a mirror approach may be introduced within the group. Assuming that the number of PRACH frequency domain resources is K, the resources #0, #1, #2, # K-1 are numbered sequentially in the order of PRB indexes from lowest to highest. The number of RBs occupied by each PRACH resource in the frequency domain is related to the subcarrier spacing, for example, the subcarrier spacing is 1.25kHz, and 6 PRBs are occupied for one PRACH resource. When the sub-carriers are spaced by other values, the number of PRBs occupied by the corresponding PRACH resources can be obtained according to a certain scaling scale. Dividing K PRACH frequency domain resources into M groups, wherein the number of PRACH resources contained in each group is K/M. The M groups are numbered 0,1,2,3 sequentially from the smallest to the largest according to the PRACH frequency domain resource index.

Alternatively, f (i) may represent the number of times the Preamble is transmitted before the current transmission of the Preamble, or the number of times the Preamble is hopped. Based on this, the frequency domain position of the current frequency hopping can be determined according to the formula (a×f (i) ² +b) modK or (a×f (i) +b) modK.

Example eight:

the embodiment gives a UE packet and a correspondence between the UE packet and a Preamble.

Mode one: and the UE in the group sequentially corresponds to the Preamble group label according to the value obtained by modulo the UE ID and the PRACH frequency domain resource number K. Wherein the UE group division is divided into [ UE ID/K ] groups in turn, labeled 0,1 in turn, according to K UEs per group.

For example, as shown in table 3, it is assumed that there are 12 UEs, the UE IDs of which are #0, #1, #2, #3, #11, the number of prach frequency domain resources K is 6, and the 12 UEs are divided into 2 groups in order of the whole value obtained by UE ID/K, wherein the UE sets corresponding to the first group of UEs are { #0, #1, #2, #3, #4, #5}, and the UE sets corresponding to the second group of UEs are { #6, #7, #8, #9, #10, #11}. Wherein the corresponding numbers of the UE groups are 0,1 in order, [ UE ID/K ] -1. Further, the Preamble index adopted by different UEs in the UE group is a Preamble index from different Preamble groups. I.e. the intra-group UE ID mod K corresponds to the Preamble index group index. Wherein, the relation between the Preamble index group and the Preamble index is shown in table 1 in embodiment three. This has the advantage that detection ambiguity problems can be prevented or reduced.

TABLE 3 Table 3

Mode two: the UE group number corresponds to the Preamble group number. Wherein the UE group division is divided into [ UE ID/K ] groups in turn, labeled 0,1 in turn, according to K UEs per group.

As shown in table 4, assuming that there are 12 UEs, the UE IDs thereof are #0, #1, #2, #3, #11, the number of prach frequency domain resources K is 6, and the 12 UEs are divided into 2 groups in order of the obtained value of UE ID/K, wherein the UE sets corresponding to the first group of UEs are { #0, #1, #2, #3, #4, #5}, and the UE sets corresponding to the second group of UEs are { #6, #7, #8, #9, #10, #11}. Its UE group number corresponds to the Preamble group number. Further, in-group UEs select Preamble index in the corresponding Preamble group, and the in-group Preamble index set is not selected once, the selected Preamble index is removed, and UEs not selecting the Preamble index will be selected from the remaining Preamble index in the Preamble group. Further, the relation between the Preamble index group and the Preamble index is shown in table 2 in embodiment three.

TABLE 4 Table 4

Example nine:

for the case of PRACH random access procedure on SUL (Supplement Uplink) carriers, the configuration information of the RACH may be configuration information of RACH on an NR conventional carrier (e.g., 3.5GHz carrier) independently, or may be a set of RACH configuration information for an NR conventional carrier, and for a SUL carrier. The specific RACH configuration information may be acquired from at least one of remaining system information RMSI, minimum system information MinimumSI, PDCCH DCI information, RRC signaling, predefined information.

Wherein the configuration information includes at least one of: the method comprises the steps of starting PRB of PRACH frequency domain resources, subcarrier interval SCS, preamble format, number of Preamble repetition or transmission N, preamble, time domain structure for repeating or transmitting N times, number of symbols occupied by the Preamble, frequency hopping time domain granularity Y, PRACH frequency domain resource number K, frequency hopping bandwidth, frequency domain fixed offset, the offset granularity being PRACH frequency domain resource granularity, or group granularity, mirror image enabling, frequency hopping enabling, correspondence between Preamble index and PRACH resources, prime numbers a and b, namely prime numbers a and b being K, number of PRACH resource groups, number of PRACH resources contained in the PRACH resource groups, PRACH time domain resources, PRACH frequency domain resources, indication information for triggering PRACH transmission, offset, transmission power, power adjustment or adjustment amount set, threshold value, metric parameter (RSRP, or RSRQ, or RSSI), offset for the metric parameter, carrier indication, starting point of RAR time window, duration of RAR time window, NR-configuration information, maximum number of contention timer length of Msg3HARQ transmission, and Preamble length of the solution group.

The offset may be an offset of at least one of a time domain resource, a frequency domain resource, and a threshold value. The threshold value may also be a shared threshold value on different carriers, and different threshold values may be configured for different carriers.

Further, in order to prevent access operation of PRACH on SUL and perform other uplink or downlink operation on normal carrier of NR, it is recommended that SUL and NR normal carrier share a set of PRACH configuration information or that resources of PRACH are configured identically on different carriers.

Further, when multiple carriers are configured, for example, one is an NR 3.5GHz carrier and the other is a SUL carrier, at this time, different UEs send preambles at the same time domain and frequency domain positions on different carriers, when the Preamble index is the same, according to the existing LTE mode of calculating RA-RNTI, the RNTIs corresponding to the preambles sent by the different UEs are the same, and at this time, in order to solve this problem, it is recommended to introduce UE ID and at least one information of the carrier IDs into the calculation of RA-RNTI.

Example ten:

The embodiment gives the processing mode of the Msg4 message.

For the conventional UL carrier and the supplementary uplink carrier SUL, the PRACH configuration message required for performing the random access procedure may be configured for the conventional UL carrier through RMSI and the SUL carrier, respectively.

If the random access process is accessed on the SUL carrier, the base station in the Msg4 message can inform the UE of at least one of the following information besides informing the UE of conventional successful access and other messages: physical uplink shared channel PUSCH resources, physical uplink control channel PUCCH configuration information, sounding reference signal SRS configuration information. In addition, in the Msg4 message, at least one of PUSCH configuration information, PUCCH configuration information, and SRS configuration information on the NR regular uplink carrier may also be indicated. The configuration information on the NR conventional carrier may be optionally configured, or may be forcibly configured.

If the random access procedure is accessed on the SUL carrier, the Msg4 can notify at least one of Physical Uplink Shared Channel (PUSCH) resource, physical Uplink Control Channel (PUCCH) configuration information and Sounding Reference Signal (SRS) configuration information on the NR conventional uplink carrier in addition to the message of successful access and the like.

If the initial random access procedure is accessed on the NR conventional UL carrier, in addition to the message informing the UE of the conventional access success, the Msg4 message may inform the UE of at least one of the following information: physical uplink shared channel PUSCH resources, physical uplink control channel PUCCH configuration information, sounding reference signal SRS configuration information. In addition, the base station may further configure at least one of PUSCH configuration information, PUCCH configuration information, and SRS configuration information on the SUL carrier through the Msg4 message. The configuration information on the SUL carrier may be optionally configured, or may be forcibly configured.

If the random access procedure is accessed on the uplink carrier with normal NR, the Msg4 can notify at least one of Physical Uplink Shared Channel (PUSCH) resource, physical Uplink Control Channel (PUCCH) configuration information and Sounding Reference Signal (SRS) configuration information on the SUL carrier in addition to the message of successful access and the like.

Wherein the PUCCH configuration information includes at least one of: PUCCH format information, PUCCH resource location, PUCCH occupied symbol, and frequency hopping enable. The SRS configuration information includes at least one of: the number of occupied symbols, period, symbol position, offset in period, comb teeth, bandwidth, and frequency hopping enable.

The configuration information may be configured by the remaining minimum system message RMSI.

Example eleven:

in this embodiment, the method for handling random access failure is described.

Case one: for the NR conventional uplink carrier and SUL carrier, the UE selects one of the uplink carriers and SUL carrier as the access carrier of the random access process according to a certain rule. If the random access process of the UE on the selected uplink carrier fails, another uplink carrier is selected to carry out the random access process again.

And a second case: for the primary carrier and the secondary carrier, a random access procedure is performed on the primary carrier. If the random access fails on the primary carrier, the UE selects the secondary carrier as the carrier for re-performing the random access procedure. For example, the primary carrier is an NR regular uplink carrier, and the secondary carrier is a SUL carrier.

Wherein for the case of multiple SUL carriers.

Case1: the UE selects whether to perform the random access procedure on the NR regular uplink carrier or the SUL carrier by a certain rule. If the SUL is selected as a carrier of the random access procedure, the UE can perform the random access procedure on only one specific SUL carrier at the time of initial random access procedure for a plurality of SUL carriers. Wherein the specific SUL carrier may be configured to the UE by the base station or RSMI. For the connected state, the carriers under the CA architecture can be added or deleted to make the UE available with multiple SUL carriers. Otherwise, if the NR regular uplink carrier is selected, the UE performs a random access procedure on the NR regular uplink carrier.

Case2: the UE selects whether to perform the random access procedure on the NR regular uplink carrier or the SUL carrier by a certain rule. If the SUL is selected as the carrier of the random access procedure, the UE may see multiple SUL carriers during the initial random access procedure for multiple SUL carriers, but it is necessary to determine which SUL of the multiple SUL carriers is the carrier of the random access procedure by way of multiple thresholds. For example, a threshold T1 is set and a threshold T2 is set, and only SUL carriers with RSRP values between T1 and T2 measured on the carriers can be used as carriers for the random access procedure. And for the connected state, the available carriers may be added or deleted to make the UE available for multiple SUL carriers. Otherwise, if the NR regular uplink carrier is selected, the UE performs a random access procedure on the NR regular uplink carrier.

For the rule of selecting the NR regular uplink carrier or the SUL carrier, the rule is to select the NR regular uplink carrier or the SUL carrier as the carrier of random access according to threshold judgment. For example, the RSRP value detected substantially on the carrier is compared with a threshold value to determine which carrier to select. The threshold value may be configured by RMSI. For example, RSRP is greater than a threshold value, then the NR conventional carrier is selected. And if the sum is smaller than the threshold value, selecting the SUL carrier. And vice versa. The RSRP may refer to the RSRP measured on the NR regular uplink carrier, or may refer to the RSRP measured on the SUL carrier. In addition to the manner in which the SUL carrier is selected by the threshold decision, it may be a random selection manner, or a manner indicated by the base station or RMSI.

If the UE fails random access on the selected SUL carrier, it may perform in one of the following ways:

Mode one: for the case of multiple SUL carriers, the UE selects a high priority carrier on the SUL carrier, or a high priority carrier, NR conventional uplink carrier, or the primary carrier performs a re-random access procedure.

Mode two: the UE selects the NR regular uplink carrier or the primary carrier performs a re-random access procedure.

Mode three: and the UE performs a re-random access process according to the uplink carrier specified by the base station.

Wherein, the priority between the NR regular uplink carrier and the SUL carrier is decreased or increased in sequence. For the case of multiple SULs, there is also a priority before the multiple SULs. For the primary and secondary carriers, the primary carrier has a higher priority than the secondary carrier.

Embodiment twelve:

the embodiment provides a random access process in a switching scene.

When the handover occurs, the carrier on which the UE performs the random access procedure may be at least one of:

Mode one: the carrier of the UE default random access is the NR regular uplink carrier or SUL carrier in the cell after handover.

Mode two: the carrier wave of random access after switching is the carrier wave of the same type as the carrier wave of random access process carried out in the original cell. For example, if the random access procedure in the original cell is NR regular uplink carrier, the random access after the handover selects NR regular uplink carrier in the new cell. Otherwise, if the random access process in the original cell is SUL, the random access after the switching selects SUL in the new cell.

Mode three: the switched random access carrier is the main carrier or the auxiliary carrier in the switched cell.

Mode four: the UE is informed by the original base station on which carrier (e.g., NR regular uplink carrier, or SUL carrier, or one of multiple SUL carriers) in the cell after the handover to perform the random access procedure.

For the case that a plurality of SULs exist in a cell after handover, a carrier for finally executing a random access procedure can be determined through selection of a plurality of thresholds, or can be designated by an original cell, or a cell is designated, or one is selected randomly.

In a specific example, in a case where a plurality of carriers have a certain priority, the UE may select which carrier is the random access carrier according to the priority of the carriers. For example, the NR regular uplink carrier, the SUL carrier priority is sequentially decremented or incremented. For the case of multiple SULs, a certain priority exists before the SULs, and similarly, when the UE selects the SULs as the random access carriers, the UE can determine the carrier for executing the random access process according to the priority among the SULs. This also applies to the case of handover. When the UE fails to perform the random access procedure on the selected carrier, the carrier that re-performs the random access procedure selects the NR normal uplink carrier or the carrier with a high priority. In another case, when the UE does not receive the indication message of the random access carrier transmitted by the base station, the NR normal uplink carrier is selected by default, or a carrier with a high priority is selected. Wherein if random access fails to be performed on the SUL, one way is to select either an NR regular uplink carrier with higher priority than the SUL or a SUL carrier with higher priority than the current SUL carrier.

The priority configuration, or PRACH resource configuration information, or PUSCH resource configuration information, or PUCCH configuration information, or SRS configuration information may be indicated by RMSI, or predefined, or by DCI signaling, or by MAC signaling, or by RRC signaling.

The Preamble frequency hopping processing method provided by the embodiment is not only suitable for transmission/reception of uplink channels/signals, but also suitable for transmission/reception of downlink channels/signals. Wherein the uplink channel/signal comprises at least one of: physical Random Access Channel (PRACH), preamble, msg3, or at least one of signals included in Msg3, sounding Reference Signal (SRS) and Physical uplink control channel (Physical uplink control channel, PUCCH), physical Uplink Shared Channel (PUSCH) and uplink demodulation reference signal (De Modulation REFERENCE SIGNAL, DMRS).

Downlink channels/channels comprising at least one of: synchronization signals (Synchronization signal, SS), synchronization signal blocks (SS Block, SSB), physical broadcast channels (Physical broadcast channel, PBCH), paging (Paging), physical downlink control channels (Physical downlink control channel, PDCCH), enhanced physical downlink control channels (ENHANCED PHYSICAL Downlink Control Channel, EPDCCH), physical downlink shared channels (Physical downlink SHARED CHANNEL, PDSCH), random access responses (Random access response, RAR), downlink demodulation reference signals (De Modulation REFERENCE SIGNAL, DMRS), channel state Information reference signals (CHANNEL STATE Information REFERENCE SIGNAL, CSI-RS), wherein the CSI-RS is further divided into: zero Power channel state information reference signals (Zero Power CSI-RS, ZP CSI-RS), non-Zero Power channel state information reference signals (Non-Zero Power CSI-RS, NZP CSI-RS), phase tracking reference signals (PHASE TRACE REFERENCE SIGNAL, PTRS) mode, newly designed reference signals, and the like.

The invention is not limited to use in multiple or repeated Preamble hopping scenarios, and other physical layer channel/signal hopping scenarios are equally applicable. In addition, the method is also suitable for high-frequency and low-frequency scenes or spectrum application scenes in which unlicensed spectrum, licensed spectrum, shared spectrum and the like may exist.

By implementing the embodiment, frequency hopping is performed on the frequency domain, so that the frequency domain diversity gain is obtained, and the uplink coverage is improved.

Example thirteen

In order to solve the problem of insufficient uplink coverage, the present embodiment provides a Preamble frequency hopping processing device, referring to fig. 19, fig. 19 is a schematic diagram of the Preamble frequency hopping processing device provided in the present embodiment, where the apparatus includes:

the position determining module is used for designating frequency domain resources of frequency hopping according to a preset frequency hopping pattern when the judging result of the judging module is frequency hopping;

And the frequency hopping module is used for carrying out frequency hopping processing on the frequency domain resources determined by the position determining module.

The device can realize the functions of all steps of the Preamble frequency hopping processing method provided in the first embodiment.

By implementing the embodiment, when Preamble is sent, received or detected, frequency hopping is performed on the frequency domain, so that the uplink coverage is improved, and the frequency domain diversity gain is obtained.

Examples fourteen

In order to solve the problem of insufficient uplink coverage, the present embodiment provides a terminal, please refer to fig. 20, fig. 20 is a schematic diagram of a terminal provided in the present embodiment, the terminal includes: a processor 1001, a memory 1002, and a communication bus 1003;

A communication bus 1003 is used to enable connectivity communications between the processor 1001 and the memory 1002;

the processor 1001 is configured to execute one or more programs stored in the memory 1002 to implement the step of frequency hopping transmission processing in the frequency hopping processing method of the Preamble in the first embodiment.

By implementing the embodiment, when the Preamble is sent, frequency hopping is performed on the frequency domain, so that the uplink coverage is improved, and the frequency domain diversity gain is obtained.

Example fifteen

In order to solve the problem that the uplink coverage is not large enough, the present embodiment provides a computer readable storage medium, where one or more programs are stored, and the one or more programs may be executed by one or more processors, so as to implement the steps of the Preamble frequency hopping processing method in the first embodiment.

It will be appreciated by those skilled in the art that the modules or steps of the embodiments of the invention described above may be implemented in a general purpose computing device, they may be centralized on a single computing device, or distributed over a network of computing devices, or they may alternatively be implemented in program code executable by computing devices, such that they may be stored in a storage medium (ROM/RAM, magnetic or optical disk) for execution by computing devices and, in some cases, the steps shown or described may be performed in a different order than what is shown or described herein, or they may be separately manufactured as individual integrated circuit modules, or a plurality of modules or steps in them may be manufactured as a single integrated circuit module. Therefore, the present invention is not limited to any specific combination of hardware and software.

The foregoing is a further detailed description of embodiments of the invention in connection with the specific embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. A frequency hopping processing method of random access preamble includes:

Under the condition of frequency hopping enabling, the transmission equipment transmits the random access preamble on the appointed resource according to a preset frequency hopping pattern or rule;

And/or the number of the groups of groups,

The transmission equipment receives or detects the random access preamble on the resources appointed by the frequency hopping pattern or rule according to the frequency hopping pattern or rule which is the same as the frequency hopping transmission;

When resources are distributed at both ends of a system bandwidth or a frequency hopping bandwidth and low and high frequency positions are staggered, the frequency domain starting positions of the frequency domain resources on the physical random access channel are calculated as follows:

When resources are distributed at two ends of a system bandwidth or a frequency hopping bandwidth and one part of the resources are in low frequency positions and the other part of the resources are in high frequency positions, the frequency domain starting positions of the frequency domain resources on the physical random access channel are calculated according to the following mode:

2. The frequency hopping processing method as claimed in claim 1, wherein the hopping pattern or rule is determined according to at least one of the following parameters:

A format of a random access preamble;

A time domain structure of a random access preamble;

Frequency hopping time domain granularity Y;

The number of symbols occupied by the random access preamble;

A frequency hopping bandwidth;

A subcarrier spacing SCS;

The number of available subbands T1;

Frequency domain location or index;

Subband location or subband index.

3. The method of frequency hopping processing as claimed in claim 2, wherein the time domain structure of the random access preamble comprises at least one of:

M1 cyclic prefixes CP;

N random access preamble sequences;

m2 guard intervals GT;

wherein N is a positive integer greater than or equal to 1, and M1 and M2 are positive integers greater than or equal to 1 and/or less than or equal to N.

4. The method for processing frequency hopping as claimed in claim 3, wherein said N random access preamble sequences satisfy one of the following conditions:

The N random access preamble sequences are the same sequence;

The N random access preamble sequences are not identical sequences.

5. The method of frequency hopping processing as claimed in claim 2, wherein the frequency hopping time domain granularity Y is one of:

wherein Q is greater than or equal to 1 and less than or equal to a positive integer equal to 6 or 7 or 12 or 14.

6. The method of frequency hopping processing as claimed in claim 2, comprising at least one of the following frequency domain resource allocation schemes:

7. The method for processing frequency hopping according to claim 2 or 6, wherein the size of the physical random access channel frequency domain resource for transmitting the random access preamble is related to the subcarrier spacing;

And the size of the physical random access channel frequency domain resource at the subcarrier interval is correspondingly scaled up or down according to the size of the physical random access channel frequency domain resource at the corresponding subcarrier interval in the conventional LTE.

8. The frequency hopping processing method as claimed in claim 2, wherein the frequency hopping bandwidth is determined by: a frequency domain offset; continuous frequency domain resource length.

9. The frequency hopping processing method according to at least one of claims 1 to 6, 8, characterized in that for the case where the specified resource is a specified physical random access channel frequency domain resource after frequency hopping or for the case where the specified resource is a subband to which the physical random access channel frequency domain resource belongs:

10. The method of frequency hopping processing as claimed in claim 9, wherein the fixed offset amount offset includes at least one of a granularity of the fixed offset amount offset and a value of the fixed offset amount offset;

the granularity of the fixed offset includes one of:

The fixed offset value includes at least one of the following:

The offset amount offset is a positive integer greater than or equal to 0 and less than or equal to the number of subbands T1.

11. The method of claim 9, wherein when the parameter is Preamble index, the predetermined rule or algorithm is:

The frequency domain resource index of the specified physical random access channel after frequency hopping or the sub-band index to which the frequency domain resource belongs is: the obtained value obtained after the modulus of the sent appointed Preamble index and the frequency domain resource number K of the physical random access channel, or the obtained value obtained after the modulus of the sent appointed Preamble index and the subband number T1.

12. The method for processing frequency hopping as claimed in claim 11, wherein, in case that there are a plurality of UEs transmitting Preamble on the same available frequency domain resource, the Preamble transmitted by each UE on the same physical random access channel frequency domain resource satisfies one of the following conditions:

The Preamble index sent by each UE comes from different Preamble index groups;

13. The method for processing frequency hopping as claimed in claim 12, wherein the dividing manner of the Preamble index group comprises at least one of:

14. The frequency hopping processing method according to at least one of claims 11 to 13, further comprising at least one of:

when the mirror image is enabled, after frequency hopping, determining the frequency domain resource index of the physical random access channel of the Preamble according to the value obtained by the operation and the number K of the frequency domain resources of the physical random access channel;

or the physical random access channel frequency domain resource index of the Preamble transmitted after frequency hopping is obtained by subtracting the calculated value from the number K of the physical random access channel frequency domain resources and subtracting or adding 1;

when the mirror image is enabled, after frequency hopping, the determination of the sub-band index of the Preamble is sent according to the value obtained by operation and the number T1 of sub-bands;

15. The method of claim 9 wherein when the parameter is a UE ID, the predetermined rule or algorithm is:

The frequency domain resource index of the specified physical random access channel after frequency hopping or the sub-band index to which the frequency domain resource belongs is: the obtained value obtained by modulo the UE ID and the number of frequency domain resources K, or the obtained value obtained by modulo the UE ID and the number of subbands T1.

16. The method for processing frequency hopping as claimed in claim 15, wherein for the case that there are a plurality of UEs transmitting the random access preamble on the same available frequency domain resource, further comprising:

17. The method of claim 9 wherein when the parameter is a fixed offset, the predetermined rule or algorithm is:

18. The method for processing frequency hopping as claimed in claim 17, wherein said determining the frequency domain resource index specified after the frequency hopping or the sub-band index to which the frequency domain resource belongs according to the frequency domain resource index to which the random access preamble is transmitted before the frequency hopping and the fixed offset comprises at least one of:

The frequency domain resource index specified after frequency hopping or the sub-band index to which the frequency domain resource belongs is: the obtained value of the sum of any one of the frequency domain resource index of the random access preamble and the sub-band index to which the frequency domain resource belongs and the fixed offset is sent before frequency hopping, and then the obtained value is obtained after the frequency domain resource number K or the sub-band number T1 is subjected to modulo;

The frequency domain resource index specified after frequency hopping or the sub-band index to which the frequency domain resource belongs is: and transmitting a value obtained by adding any one of a frequency domain resource index of the random access preamble and a sub-band index to which the frequency domain resource belongs and a fixed offset before frequency hopping.

19. The method of frequency hopping processing as claimed in claim 18, wherein the fixed offset is at least one of:

A value generated based on a random function; a value greater than or equal to 1 and less than or equal to the number of physical random access channel frequency domain resources K or the number of subbands T1.

20. The frequency hopping processing method according to at least one of the claims 17 to 19, characterized in that,

Determining frequency domain resource indexes on the frequency-hopping physical random access channel in a surrounding manner on K frequency domain resources or on T1 sub-bands; or determining the sub-band index after frequency hopping on K frequency domain resources or on T1 sub-band in a surrounding mode;

Wherein the surrounding mode comprises one of the following: forward encircling; reverse wrapping.

21. The frequency hopping processing method according to at least one of claims 17 to 19, characterized by further comprising at least one of:

When the mirror image is enabled, after frequency hopping, determining a physical random access channel frequency domain resource index of a Preamble according to the value obtained by operation and the number K of the physical random access channel frequency domain resources;

Determining, according to the subband index to which the frequency domain resource that sent the random access Preamble before frequency hopping belongs and the fixed offset, the subband index to which the frequency domain resource that sent the Preamble after frequency hopping belongs, where the subband index includes at least one of:

22. The method of frequency hopping processing as claimed in claim 9, further comprising one of:

the frequency domain resource index specified after frequency hopping or the sub-band index to which the frequency domain resource belongs is: before the frequency hopping, transmitting a value obtained by multiplying any one of a frequency domain resource index of the random access Preamble, a sub-band index to which the frequency domain resource belongs and a Preamble index with a prime number a, and then obtaining a value obtained by adding the prime number b to the frequency domain resource number K or a sub-band number T1;

the frequency domain resource index specified after frequency hopping or the sub-band index to which the frequency domain resource belongs is: and before frequency hopping, transmitting a value obtained by multiplying any one of a frequency domain resource index of the random access Preamble, a sub-band index to which the frequency domain resource belongs and a quadratic product of a Preamble index with a prime number a, and then obtaining a value obtained by adding the prime number b to the frequency domain resource number K or a sub-band number T1, and obtaining a value obtained by modulo.

23. The method of processing frequency hopping according to claim 9, wherein the frequency hopping is preceded by a last frequency hopping, or a first frequency hopping, or a previous frequency hopping.

24. The method of frequency hopping processing as claimed in claim 1, wherein when the resources are continuous in the frequency domain, the frequency domain starting position of the frequency domain resources on the physical random access channel is calculated as follows:

Formula II: and the second formula represents the frequency domain starting position determined by the direction of the resources from high frequency to low frequency in sequence.

25. The method for processing frequency hopping as claimed in claim 2, wherein the acquiring means for determining the configuration parameters of the frequency hopping pattern or rule comprises at least one of:

predefined, higher layer RRC signaling, RMSI, physical layer DCI signaling.

26. The method of frequency hopping processing as claimed in claim 25, wherein the obtaining means is further configured to obtain at least one of the following configuration parameters:

A system bandwidth;

mirror image enabling;

frequency hopping enabling;

frequency hopping direction or surround mode;

A starting position of the subband;

27. A frequency hopping processing device of a random access preamble, comprising:

The frequency hopping module is used for carrying out frequency hopping processing on the resources determined by the position determining module;

28. A terminal, comprising: a processor, a memory, and a communication bus;

the processor is configured to execute one or more programs stored in a memory to implement the transmission processing steps in the frequency hopping processing method according to any one of claims 1 to 26.

29. A computer-readable storage medium storing one or more programs executable by one or more processors to implement the steps of the frequency hopping processing method of any of claims 1 to 26.