CN108271271B

CN108271271B - Random access method, sending end and receiving end

Info

Publication number: CN108271271B
Application number: CN201611261970.2A
Authority: CN
Inventors: 沈晓冬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2019-12-31
Anticipated expiration: 2036-12-30
Also published as: CN108271271A; WO2018121376A1

Abstract

The embodiment of the invention provides a random access method, a sending end and a receiving end, wherein the method comprises the following steps: acquiring a Physical Random Access Channel (PRACH) sequence; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end; sending the PRACH sequence to a receiving end; and receiving a response message sent by the receiving end. The embodiment of the invention can enable the PRACH sequence to carry more useful information in limited resources.

Description

Random access method, sending end and receiving end

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a random access method, a transmitting end, and a receiving end.

Background

A Physical Random Access Channel (PRACH) designed in a 4G Long Term Evolution (LTE) Physical layer of the existing fourth-generation mobile communication technology is mainly used for a terminal side to initiate an uplink Random Access request, so that a base station side further determines a subsequent response according to the request. The main 4 steps of the existing random access process are as follows: the method comprises the following steps: preamble (i.e., PRACH sequence) transmission; step two: a random access response; step three: layer 2/layer 3 messages; step four: a contention resolution message.

In the first step, a sequence (sequence) generated by a Preamble code of a physical layer is mapped to a time-frequency resource of the physical layer and then transmitted, and the LTE currently hosts 5 formats, wherein the length of the format (format)4 is equal to one symbol length of the LTE.

For acquiring the PRACH sequence, the zc (zaddoff chu) sequence adopted by LTE is as follows:

where u is the number of the root sequence, N_ZCIs the sequence length and n refers to the nth sample point of the sequence. And the process of acquiring the PRACH sequence by the UE is as follows:

the maximum number of PRACH sequences that a UE can use in a cell is 64, and the 64 different types of PRACH sequence generation procedures are as follows:

first, a root sequence index (root sequence index) is adopted to generate a Zaddoff Chu base sequence (for formats 0-3, N)_ZC＝839，Format 4，N_ZC139), the root sequence index is notified by a System Information Block (SIB) 2; the correspondence between the terminal Logical (Logical) root sequence index and the number of the root sequence is shown in table 1.

In the second step, 64 different sequences are generated by cyclic shifting of the base sequence. Wherein, the cyclic shift interval is configured by the network side.

TABLE 1

For example, when the root sequence index is 22 and the cyclic shift interval is 26, 64 different PRACH sequences are obtained as follows.

PRACH preamble sequence [0] ═ base sequence

Cyclic shift of 1 × 26 sampling points for PRACH leader sequence [1] ═ motif sequence

Cyclic shift of PRACH leader sequence [2] ═ motif sequence by 2 × 26 sampling points

…

Cyclic shift of 31 × 26 sampling points for PRACH leader sequence [31] ═ motif sequence

Cyclic shift of 1 sampling point for PRACH leader sequence [32] ═ motif sequence

Cyclic shift of 1+1 × 26 sampling points for PRACH leader sequence [33] ═ motif sequence

Cyclic shift of 1+2 × 26 sampling points for PRACH leader sequence [34] ═ motif sequence

Cyclic shift of 1+31 × 26 sampling points for PRACH leader sequence [63] ═ motif sequence

With the development of communication technologies, the random access process of a new air interface (NR) in the fifth generation mobile communication technology (5G) requires that the PRACH sequence is transmitted by the transmitting end while carrying as much useful information as possible, such as a terminal identifier, etc., but the information carried by the current PRACH sequence is limited and cannot carry more useful information in limited resources.

Disclosure of Invention

Embodiments of the present invention provide a random access method, a sending end, and a receiving end, so as to solve the problem that PRACH sequences carry limited information and cannot carry more useful information in limited resources.

In a first aspect, an embodiment of the present invention provides a random access method, which is applied to a sending end, and the method includes:

acquiring a Physical Random Access Channel (PRACH) sequence; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end;

sending the PRACH sequence to a receiving end;

and receiving a response message sent by the receiving end.

In a second aspect, an embodiment of the present invention further provides a sending end, where the sending end includes:

an acquisition module, configured to acquire a physical random access channel PRACH sequence; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end;

the first sending module is used for sending the PRACH sequence to a receiving end;

the first receiving module is used for receiving the response message sent by the receiving end.

In a third aspect, an embodiment of the present invention further provides a random access method, which is applied to a receiving end, and the method includes:

receiving a Physical Random Access Channel (PRACH) sequence sent by a sending end; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end;

and sending a response message to the sending end according to the PRACH sequence.

In a fourth aspect, an embodiment of the present invention further provides a receiving end, where the receiving end includes:

the second receiving module is used for receiving a Physical Random Access Channel (PRACH) sequence sent by the sending end; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end;

and the second sending module is used for sending a response message to the sending end according to the PRACH sequence.

Thus, in the embodiment of the present invention, the PRACH sequence that includes the basic sequence carrying the identification information of the transmitting end and the extended sequence carrying the extra information of the transmitting end and is transmitted to the receiving end in the random access process receives the response message transmitted by the receiving end, so that the PRACH sequence transmitted by the transmitting end in the random access process carries more useful information.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

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

fig. 2 is a flowchart of a random access method according to a second embodiment of the present invention;

fig. 3A is a diagram illustrating PRACH sequence generation according to a second embodiment of the present invention;

fig. 3B is a second schematic diagram illustrating PRACH sequence generation according to a second embodiment of the present invention;

fig. 3C is a third schematic diagram illustrating PRACH sequence generation according to a second embodiment of the present invention;

fig. 3D is a diagram illustrating PRACH sequence transmission according to a second embodiment of the present invention;

fig. 3E is a diagram illustrating a second example of PRACH sequence transmission according to the second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a transmitting end in a third embodiment of the present invention;

fig. 5 is a second schematic structural diagram of a transmitting end according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to a fourth embodiment of the present invention;

fig. 7 is a schematic structural diagram of a network device according to a fifth embodiment of the present invention;

fig. 8 is a flowchart of a random access method in a sixth embodiment of the present invention;

fig. 9 is a schematic structural diagram of a receiving end according to a seventh embodiment of the present invention;

fig. 10 is a second schematic structural diagram of a receiving end according to a seventh embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network device according to an eighth embodiment of the present invention;

fig. 12 is a schematic structural diagram of a terminal according to a ninth embodiment of the present invention.

Detailed Description

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

First embodiment

As shown in fig. 1, a first embodiment of the present invention provides a random access method, which is applied to a sending end, and the method includes:

step 101, acquiring a Physical Random Access Channel (PRACH) sequence.

Wherein, the PRACH sequence includes: a basic sequence carrying identification information of the sending end and an extension sequence carrying additional information of the sending end. The additional information of the transmitting end may include other identification information of the transmitting end, beam information of the transmitting end, and the like. It should be noted that other identification information in the extra information is different from the identification information carried by the basic sequence, but all of the identification information can be used for identifying the sending end.

In the embodiment of the present invention, a PRACH sequence including a base sequence and a spreading sequence is obtained by a code sub-superposition method. For the physical layer process of sharing one section of resources by multiple users, such as random access (for example, uplink random access), the characteristic of 'soft capacity' of the system can be fully utilized by adopting a code domain superposition mode, and the purpose of carrying more useful information in limited resources is realized.

And step 102, sending the PRACH sequence to a receiving end.

In the random access process, the sending end sends the PRACH sequence containing the basic sequence and the extended sequence to the receiving end, so that the receiving end can respond according to more useful information (namely the identification information and the additional information of the sending end).

Step 103, receiving the response message sent by the receiving end.

Wherein, the response message includes information for indicating whether to grant the access of the transmitting end, and the like. It should be noted that the response message may be the same as the random access response in the random access procedure of the 4G LTE, and this is common knowledge for those skilled in the art, so that redundant description is not repeated here.

In an embodiment of the present invention, the sending end may be a terminal, such as a smart phone, a tablet computer, or a network device, such as a base station, a core network control node, or the like. If the sending end is a terminal, the receiving end is network equipment; if the sending end is a network device, the receiving end is a terminal.

Therefore, in the first embodiment of the present invention, the PRACH sequence that includes the basic sequence carrying the identification information of the sending end and the extended sequence carrying the extra information of the sending end is sent to the receiving end in the random access process, and the response message sent by the receiving end is received, so that the PRACH sequence sent by the sending end in the random access process carries more useful information.

Second embodiment

As shown in fig. 2, a second embodiment of the present invention provides a random access method, which is applied to a sending end, and the method includes:

step 201, generating a basic sequence according to the ZC sequence.

The basic sequence carries identification information of the sending end, so that the receiving end can distinguish different sending ends according to the basic sequence.

And in a second embodiment of the present invention, the aboveZC sequencex_u(N) denotes a ZC sequence, u denotes the number of a root sequence, N_ZCDenotes the sequence length, N denotes the nth sample point of the sequence, j denotes the imaginary unit, and u and N_ZCAre all configured and obtained according to sequence information issued by a receiving terminal in advance. It should be noted that the sequence information sent by the receiving end refers to various information that is needed when the transmitting end acquires the PRACH sequence, and specifically includes related parameters of the ZC sequence (for example, the number of a root sequence, a sequence length, and the like), the number of root sequences involved in generating a base sequence and an extended sequence, the number of cyclic shifts, the number of subsequences included in the extended sequence, a modulation order of Quadrature Amplitude Modulation (QAM), a correlation matrix (for example, a K × K matrix), a plurality of ZC sequences, a plurality of weight values, and the like. And various information included in the sequence information required for acquiring the PRACH sequence will be described in detail later.

Wherein, in the second embodiment of the present invention, the formula can be passedAnd generating a basic sequence. Wherein S is₁Representing a base sequence, beta a first preset weight value,number u representing root sequence₀X of_u(n) cyclic shift of offset bits of the sequence, and u₀And the offset is configured according to the sequence information, and the beta can also be configured according to the sequence information.

Step 202, generating an extended sequence according to the ZC sequence.

The extra information of the transmitting end of the spreading sequence enables the receiving end to obtain the extra information carried by the random access according to the spreading sequence, such as other identification information of the transmitting end and beam information of the transmitting end, so that the receiving end responds to the random access.

In the second embodiment of the present invention, the spreading sequence may be generated by mapping the extra information of the transmitting end to at least two ZC sequences; or, the spreading sequence is generated by mapping the extra information of the transmitting end to one ZC sequence.

And step 203, overlapping the extended sequence to the basic sequence to generate a PRACH sequence.

In the second embodiment of the present invention, in the process of generating the base sequence and the extended sequence, the base sequence and the extended sequence both perform amplitude and phase adjustment through respective weight values, so that the PRACH sequence obtained by superimposing (i.e., adding) the base sequence and the extended sequence has better receiving performance.

Step 204, the PRACH sequence is sent to the receiving end.

In the second embodiment of the present invention, the PRACH sequence may be transmitted to the receiving end by time division multiplexing or frequency division multiplexing.

Step 205, receiving the response message sent by the receiving end.

Wherein, the response message includes information for indicating whether to grant the access of the transmitting end, and the like. In an embodiment of the present invention, the sending end may be a terminal, such as a smart phone, a tablet computer, or a network device, such as a base station, a core network control node, or the like. If the sending end is a terminal, the receiving end is network equipment; if the sending end is a network device, the receiving end is a terminal.

In the second embodiment of the present invention, if the extended sequence is generated by mapping the extra information of the sender to at least two ZC sequences, that is, the extended sequence is generated by bitmap (bitmap) mapping, the specific implementation manner of generating the extended sequence by mapping the extra information of the sender to at least two ZC sequences may be: by the formulaAnd generating a spreading sequence. Wherein S is₂Denotes a spreading sequence, K denotes the number of subsequences included in the spreading sequence, K is N/Q, N denotes the number of bits of extra information, and Q denotes QAM modulationK denotes the number of the sub-sequence, beta_kA second preset weight value representing the kth sub-sequence,number w representing root sequence₀(k) X of_uOffset of (n) sequence_kThe bits are cyclically shifted in a cyclic manner,A₀(m) denotes additional information of the transmitting end, W, carried by the mth sub-sequence_kmRepresents a K matrix, and K, Q, offset_kAnd W_kmAre configured according to sequence information, and moreover, beta_kAnd can also be configured according to the sequence information. In addition, A is₀(m) transformation to B₀(k) And then modulated onto a ZC sequence, a possible transformation can be a Walsh sequence transformation, the main purpose being to make the information bit carrying more robust against possible interference. And if a Walsh sequence (i.e., W) transform is used, then a₀(m) transformation to B₀(k) That is, the process of converting sequence a into sequence B is as follows, where B is W · a,

whereinThe operation is the product of M and N Cronck. For example when K is 2,

in addition, in the second embodiment of the present invention, if the spreading sequence is generated by a bitmap mapping method, a process of generating the PRACH sequence is shown in fig. 3A, where:

(u, offset, Nzc): indicating the u-th ZC root sequence with the length of Nzc, and performing offset bit cyclic shift;

the steps are as follows:

BLOCK 1: determine one (u)₀Offset, Nzc), using ZC sequence with identification information of the transmitting end as basic sequence of PRACH;

BLOCK 2: the carried extra information is converted into serial-to-parallel (S/P) and is marked as { A₀(m),m＝0,1,…K-1}；

BLOCK 3: the information sequence generated by BLOCK2 is whitened by matrix transformation₀(m), m 0,1, … K-1 into { B₀(k) K is 0,1, … K-1, and the transformation matrix is W_km；

BLOCK 4: with B₀(k) Modulating each ZC sequence carrying extra information;

BLOCK 5: multiplying each branch by weight value beta, beta_kAnd (6) adjusting.

BLOCK 6: the two part signals in BLOCK 5 (base and spreading sequences) are added.

In the second embodiment of the present invention, if the extended sequence is generated by mapping the extra information of the transmitting end to a ZC sequence, there are two specific implementation manners for generating the extended sequence by mapping the extra information of the transmitting end to a ZC sequence. The first specific implementation manner is a sequence selection mapping manner, and the method specifically includes the following steps: firstly, determining the number k of a ZC sequence corresponding to the format of the extra information of a sending end according to the corresponding relation between the format of the extra information stored in advance and the number of the ZC sequence; then through formula S₃＝β_k·y_k(n,offset_k) And generating a spreading sequence. Wherein S is₃Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kBit cyclic shift, β_kRepresents a third preset weight value, K ═ 2^NN denotes the number of bits of the extra information of the transmitting end, and K ZC sequences, offsets_k、β_kAre all configured according to the sequence information. Wherein doFor an example, the correspondence relationship between the format of the pre-stored additional information and the number of the ZC sequence can be as shown in Table 2, wherein a in Table 2₀,a₁,a₂,…a_nOne bit, a, respectively representing extra information_nIndicates the (n + 1) th bit (n-3 in table 2).

Format of additional information (a)₀,a₁,a₂,…a_n)	Number k of ZC sequence
		0000	0
0001	1
		0010	2
0011	3
		…	…
1111	15

TABLE 2

In addition, in the second embodiment of the present invention, if the spreading sequence is generated by a sequence selective mapping manner, a process of generating the PRACH sequence is shown in fig. 3B, where:

the steps are as follows:

BLOCK 2: mapping the carried extra information to a ZC sequence, wherein the number of the extra information is k;

BLOCK 3: determining the extended sequence as y according to the sequence with the number of k_k(n,offset_k)；

BLOCK 4: multiplying each branch by weight beta, beta_kAnd (6) adjusting.

BLOCK 5: the two part signals in BLOCK 4 (base and spreading sequences) are added.

A second implementation manner of generating the spreading sequence by mapping the extra information of the transmitting end to a ZC sequence is a hybrid manner of combining sequence selection mapping with QAM modulation mapping, and the method specifically includes the following steps: firstly, determining the number k of a ZC sequence corresponding to the format of the first part of extra information of the extra information of a sending end according to the corresponding relation between the format of the pre-stored extra information and the number of the ZC sequence; then, according to the corresponding relationship between the format of the pre-stored extra information and the constellation symbol, determining the constellation symbol s corresponding to the format of the second part of extra information except the first part of extra information in the extra information of the sending end₂(ii) a Finally, by formula S₄＝β_k·s₂·y_k(n,offset_k) And generating a spreading sequence. Wherein S is₄Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kThe bits are cyclically shifted in a cyclic manner,N₁the number of bits, β, representing the first part of the extra information_kRepresents a fourth predetermined weight value, and K ZC sequences, offset_k、β_kAre all configured according to the sequence information. In addition, N is₁Less than the total number of bits of the extra information.

As an example, the correspondence relationship between the format of the pre-stored additional information and the number of the ZC sequence may be as shown in table 2, and the correspondence relationship between the format of the pre-stored additional information and the constellation symbol may be as shown in table 3, where a in table 3₀,a₁,a₂,…a_n2One bit, a, respectively representing the second part of the extra information_n2Denotes the n-th₂+1 (n in Table 3₂1) bit, j represents an imaginary unit, j equals sqrt (-1), and sqrt (×) represents a square root operation of a number. In addition, it should be noted that the hybrid of the sequence selection mapping in combination with the QAM modulation mapping, i.e., N corresponding to the extra information₁Bits adopt sequence selection mapping mode, and the rest N in extra information₂Bits according to N₂Generating constellation symbols by means of order QAM mapping, and modulating the constellation symbols to N₁The bits are mapped on the sequence obtained by adopting the sequence selection. Wherein N is₂The constellation symbol is a point on the constellation diagram corresponding to the modulated signal, and is the bit number of the second part of the extra information except the first part of the extra information in the extra information.

Format of additional information (a)₀,a₁,a₂,…a_n2)	s₂
		00	1
01	j
		10	-1
11	-j

TABLE 3

In a second embodiment of the present invention, if a spreading sequence is generated in a hybrid manner of combining sequence selection mapping and QAM modulation mapping, a process of generating the PRACH sequence is shown in fig. 3C, where:

the steps are as follows:

BLOCK 2: n in the extra information carried₁Mapping bits to a ZC sequence with the number of k;

BLOCK 4: remaining N of the extra information to be carried₂Bit is according to N₂Constellation symbol s generated by order QAM mapping mode₂Multiplication by s₂·y_k(n,offset_k)；

BLOCK 5: multiplying each branch by weight beta, beta_kAdjusting;

In the second embodiment of the present invention, the step 204 includes three specific implementation manners. The first specific implementation manner is as follows: and directly sending the PRACH sequence generated after the extension sequence is superposed to the basic sequence.

The second specific implementation manner is a time division multiplexing manner, and the method specifically includes the following steps: sending a basic sequence at a first preset time; and transmitting the spreading sequence at a second preset time. I.e. different time slots are used for transmitting the basic sequence and the spreading sequence.

The third specific implementation manner is frequency division multiplexing, and the third specific implementation manner specifically is: the base sequence is transmitted at a first predetermined frequency domain sub-band, and the spreading sequence is transmitted at a second predetermined frequency domain sub-band at the same time. That is, the base sequence and the spreading sequence are transmitted at the same time, but in different frequency subbands.

Here, to further understand the manner of transmitting the PRACH sequence, the manner of generating the PRACH sequence in fig. 3C is taken as an example to further describe the manner of transmitting the PRACH sequence. If the basic sequence and the extended sequence are transmitted in a time division multiplexing manner, the process of transmitting the basic sequence and the extended sequence is shown in fig. 3D, and if the basic sequence and the extended sequence are transmitted in a frequency division multiplexing manner, the process of transmitting the basic sequence and the extended sequence is shown in fig. 3E. In fig. 3D and 3E, the abscissa of the simple coordinate represents time, and the ordinate represents frequency.

As can be seen from the above, in the second embodiment of the present invention, a basic sequence carrying identification information of a transmitting end and an extended sequence carrying additional information of the transmitting end are generated according to a ZC sequence, and the extended sequence is superimposed on the basic sequence to generate a PRACH sequence, so that the PRACH sequence transmitted to a receiving end in a random access process can carry more useful information in limited resources.

Third embodiment

The first to second embodiments above describe in detail the random access method in different scenarios, and the sending end corresponding to the random access method will be further described with reference to fig. 4 and 5.

As shown in fig. 4 to fig. 5, a third embodiment of the present invention provides a transmitting end, where the transmitting end 400 includes:

an obtaining module 401, configured to obtain a PRACH sequence of a physical random access channel; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end;

a first sending module 402, configured to send a PRACH sequence to a receiving end;

a first receiving module 403, configured to receive a response message sent by the receiving end.

The transmitting end 400 may be a terminal, such as a smart phone, a tablet computer, or a network device, such as a base station, a core network control node, or the like. If the sending end is a terminal, the receiving end is network equipment; if the sending end is a network device, the receiving end is a terminal.

Optionally, the obtaining module 401 includes:

a first generation submodule 4011 configured to generate a basic sequence according to the ZC sequence;

a second generation submodule 4012, configured to generate an extended sequence according to the ZC sequence;

and an overlap sub-module 4013, configured to overlap the spreading sequence with the basic sequence to generate a PRACH sequence.

Alternatively to this, the first and second parts may,

ZC sequencex_u(N) denotes a ZC sequence, u denotes the number of a root sequence, N_ZCDenotes the sequence length, N denotes the nth sample point of the sequence, j denotes the imaginary unit, and u and N_ZCAre all configured and obtained according to sequence information issued by a receiving terminal in advance.

Optionally, the first generation submodule 4011 is specifically configured to pass through a formulaGenerating a basic sequence;

wherein S is₁Representing a base sequence, beta a first preset weight value,number u representing root sequence₀X of_u(n) cyclic shift of offset bits of the sequence, and u₀And the offset is configured according to the sequence information.

Optionally, the second generating sub-module 4012 includes:

a first generating unit 40121 configured to generate a spreading sequence by mapping the additional information of the transmitting end to at least two ZC sequences; or

A second generating unit 40122 for generating a spreading sequence by mapping the extra information of the transmitting end to one ZC sequence.

Optionally, the first generating unit 40121 is specifically configured to pass the formulaGenerating a spreading sequence;

wherein S is₂Denotes a spreading sequence, K denotes the number of subsequences included in the spreading sequence, K is N/Q, N denotes the number of bits of extra information, Q denotes the modulation order of QAM modulation, K denotes the number of subsequences, β denotes the number of subsequences_kA second preset weight value representing the kth sub-sequence,number w representing root sequence₀(k) X of_uOffset of (n) sequence_kThe bits are cyclically shifted in a cyclic manner,A₀(m) denotes additional information of the transmitting end, W, carried by the mth sub-sequence_kmRepresents a K matrix, and K, Q, offset_kAnd W_kmAre all configured according to the sequence information.

Optionally, the second generating unit 40122 includes:

a first determining subunit 401221, configured to determine, according to a correspondence between a format of the pre-stored extra information and a number of the ZC sequence, a number k of the ZC sequence corresponding to the format of the extra information at the transmitting end;

a first generating subunit 401222 for passing formula S₃＝β_k·y_k(n,offset_k) Generating a spreading sequence;

wherein S is₃Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kBit cyclic shift, β_kIndicates a third presetWeight value, K ═ 2^NN denotes the number of bits of the extra information of the transmitting end, and K ZC sequences, offsets_k、β_kAre all configured according to the sequence information.

Optionally, the second generating unit 40122 includes:

a second determining subunit 401223, configured to determine, according to a correspondence between a format of the pre-stored extra information and a number of the ZC sequence, a number k of the ZC sequence corresponding to the format of the first part of the extra information at the transmitting end;

a third determining subunit 401224, configured to determine, according to a correspondence between a format of the pre-stored extra information and a constellation symbol, the constellation symbol s corresponding to a format of a second part of extra information, except the first part of extra information, in the extra information at the sending end₂；

A second generation subunit 401225 for passing formula S₄＝β_k·s₂·y_k(n,offset_k) Generating a spreading sequence;

wherein S is₄Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kThe bits are cyclically shifted in a cyclic manner,N₁the number of bits, β, representing the first part of the extra information_kRepresents a fourth predetermined weight value, and K ZC sequences, offset_k、β_kAre all configured according to the sequence information.

Optionally, the first sending module 402 includes:

the first sending submodule 4021 is configured to send the basic sequence at a first preset time;

the second sending sub-module 4022 is configured to send the spreading sequence at a second preset time.

Optionally, the first sending module 402 is specifically configured to send the basic sequence in a first preset frequency domain subband, and send the spreading sequence in a second preset frequency domain subband at the same time.

In the third embodiment of the present invention, the sending end sends the PRACH sequence including the basic sequence carrying the identification information of the sending end and the extended sequence carrying the extra information of the sending end to the receiving end in the random access process, and receives the response message sent by the receiving end, so that the PRACH sequence sent by the sending end in the random access process carries more useful information.

Fourth embodiment

In order to better achieve the above object, if the sending end is a terminal, as shown in fig. 6, a fourth embodiment of the present invention provides a terminal, where the terminal 600 includes: at least one processor 601, memory 602, at least one network interface 604, and a user interface 603. The various components in terminal 600 are coupled together by a bus system 605. It is understood that the bus system 605 is used to enable communications among the components. The bus system 605 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 605 in fig. 6.

The user interface 603 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It will be appreciated that the memory 602 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr SDRAM ), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 602 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 602 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 6021 and application programs 6022.

The operating system 6021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application program 6022 includes various application programs such as a Media Player (Media Player), a Browser (Browser), and the like, and is used to implement various application services. A program implementing the method of an embodiment of the invention can be included in the application program 6022.

In the embodiment of the present invention, the processor 601 is configured to acquire a physical random access channel PRACH sequence by calling a program or an instruction stored in the memory 602, which may be specifically a program or an instruction stored in the application program 6022; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end; sending the PRACH sequence to a receiving end; and receiving a response message sent by the receiving end.

The method disclosed by the above-mentioned embodiment of the present invention can be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The Processor 601 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and completes the steps of the method in combination with the hardware thereof.

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

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

Optionally, the processor 601 is further configured to: generating a basic sequence according to the ZC sequence; generating an extended sequence according to the ZC sequence; and overlapping the extended sequence to the basic sequence to generate the PRACH sequence.

Wherein, ZC sequencex_u(N) denotes a ZC sequence, u denotes the number of a root sequence, N_ZCDenotes the sequence length, N denotes the nth sample point of the sequence, j denotes the imaginary unit, and u and N_ZCAre all configured and obtained according to sequence information issued by a receiving terminal in advance.

Optionally, the processor 601 is further configured to: by the formulaGenerating a basic sequence; wherein S is₁Representing a base sequence, beta a first preset weight value,number u representing root sequence₀X of_u(n) cyclic shift of offset bits of the sequence, and u₀And the offset is configured according to the sequence information.

Optionally, the processor 601 is further configured to: generating an extended sequence by mapping the additional information of the transmitting end to at least two ZC sequences; or, the spreading sequence is generated by mapping the extra information of the transmitting end to one ZC sequence.

Optionally, the processor 601 is further configured to: by the formulaGenerating a spreading sequence; wherein S is₂Denotes a spreading sequence, K denotes the number of subsequences included in the spreading sequence, K is N/Q, N denotes the number of bits of extra information, Q denotes the modulation order of QAM modulation, K denotes the number of subsequences, β denotes the number of subsequences_kA second preset weight value representing the kth sub-sequence,number w representing root sequence₀(k) X of_uOffset of (n) sequence_kThe bits are cyclically shifted in a cyclic manner,A₀(m) denotes the addition of the sender carried by the mth subsequenceInformation, W_kmRepresents a K matrix, and K, Q, offset_kAnd W_kmAre all configured according to the sequence information.

Optionally, the processor 601 is further configured to: determining the number k of the ZC sequence corresponding to the format of the extra information of the sending end according to the corresponding relation between the format of the extra information stored in advance and the number of the ZC sequence; by the formula S₃＝β_k·y_k(n,offset_k) Generating a spreading sequence; wherein S is₃Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kBit cyclic shift, β_kRepresents a third preset weight value, K ═ 2^NN denotes the number of bits of the extra information of the transmitting end, and K ZC sequences, offsets_k、β_kAre all configured according to the sequence information.

Optionally, the processor 601 is further configured to: determining the number k of the ZC sequence corresponding to the format of the first part of extra information of the sending end according to the corresponding relation between the format of the pre-stored extra information and the number of the ZC sequence; according to the corresponding relation between the format of the pre-stored extra information and the constellation symbol, determining the constellation symbol s corresponding to the format of the second part of extra information except the first part of extra information in the extra information of the sending end₂(ii) a By the formula S₄＝β_k·s₂·y_k(n,offset_k) Generating a spreading sequence; wherein S is₄Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kThe bits are cyclically shifted in a cyclic manner,N₁the number of bits, β, representing the first part of the extra information_kRepresents a fourth predetermined weight value, and K ZC sequences, offset_k、β_kAre all configured according to the sequence information.

Optionally, the processor 601 is further configured to: sending a basic sequence at a first preset time; and transmitting the spreading sequence at a second preset time.

Optionally, the processor 601 is further configured to: the base sequence is transmitted at a first predetermined frequency domain sub-band, and the spreading sequence is transmitted at a second predetermined frequency domain sub-band at the same time.

The terminal 600 can implement each process implemented by the sending end in the foregoing embodiments, and is not described here again to avoid repetition.

In the fourth embodiment of the present invention, the terminal transmits to the receiving end in the random access process, and receives the response message sent by the receiving end, so that the PRACH sequence sent by the transmitting end in the random access process carries more useful information, where the PRACH sequence includes a basic sequence carrying identification information of the transmitting end and an extended sequence carrying additional information of the transmitting end.

Fifth embodiment

In order to better achieve the above object, if the sending end is a network device, as shown in fig. 7, a fifth embodiment of the present invention provides a network device, where the network device includes: a processor 700; a memory 720 connected to the processor 700 through a bus interface, and a transceiver 710 connected to the processor 700 through a bus interface; the memory 720 is used for storing programs and data used by the processor in performing operations; transmitting data information or pilot frequency through the transceiver 710, and receiving an uplink control channel through the transceiver 710; when the processor 700 calls and executes the programs and data stored in the memory 720, it is specifically configured to acquire a physical random access channel PRACH sequence; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end; sending the PRACH sequence to a receiving end; and receiving a response message sent by the receiving end.

Optionally, the processor 700 is further configured to: generating a basic sequence according to the ZC sequence; generating an extended sequence according to the ZC sequence; and overlapping the extended sequence to the basic sequence to generate the PRACH sequence.

Optionally, the processor 700 is further configured to: by the formulaGenerating a basic sequence; wherein S is₁Representing a base sequence, beta a first preset weight value,number u representing root sequence₀X of_u(n) cyclic shift of offset bits of the sequence, and u₀And the offset is configured according to the sequence information.

Optionally, the processor 700 is further configured to: generating an extended sequence by mapping the additional information of the transmitting end to at least two ZC sequences; or, the spreading sequence is generated by mapping the extra information of the transmitting end to one ZC sequence.

Optionally, the processor 700 is further configured to: by the formulaGenerating a spreading sequence; wherein S is₂Denotes a spreading sequence, K denotes the number of subsequences included in the spreading sequence, K is N/Q, N denotes the number of bits of extra information, Q denotes the modulation order of QAM modulation, K denotes the number of subsequences, β denotes the number of subsequences_kA second preset weight value representing the kth sub-sequence,number w representing root sequence₀(k) X of_uOffset of (n) sequence_kThe bits are cyclically shifted in a cyclic manner,A₀(m) denotes the addition of the sender carried by the mth subsequenceInformation, W_kmRepresents a K matrix, and K, Q, offset_kAnd W_kmAre all configured according to the sequence information.

Optionally, the processor 700 is further configured to: determining the number k of the ZC sequence corresponding to the format of the extra information of the sending end according to the corresponding relation between the format of the extra information stored in advance and the number of the ZC sequence; by the formula S₃＝β_k·y_k(n,offset_k) Generating a spreading sequence; wherein S is₃Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kBit cyclic shift, β_kRepresents a third preset weight value, K ═ 2^NN denotes the number of bits of the extra information of the transmitting end, and K ZC sequences, offsets_k、β_kAre all configured according to the sequence information.

Optionally, the processor 700 is further configured to: determining the number k of the ZC sequence corresponding to the format of the first part of extra information of the sending end according to the corresponding relation between the format of the pre-stored extra information and the number of the ZC sequence; according to the corresponding relation between the format of the pre-stored extra information and the constellation symbol, determining the constellation symbol s corresponding to the format of the second part of extra information except the first part of extra information in the extra information of the sending end₂(ii) a By the formula S₄＝β_k·s₂·y_k(n,offset_k) Generating a spreading sequence; wherein S is₄Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kThe bits are cyclically shifted in a cyclic manner,N₁the number of bits, β, representing the first part of the extra information_kRepresents a fourth predetermined weight value, and K ZC sequences, offset_k、β_kAre all configured according to the sequence information.

Optionally, the processor 700 is further configured to: sending a basic sequence at a first preset time; and transmitting the spreading sequence at a second preset time.

Optionally, the processor 700 is further configured to: the base sequence is transmitted at a first predetermined frequency domain sub-band, and the spreading sequence is transmitted at a second predetermined frequency domain sub-band at the same time.

A transceiver 710 for receiving and transmitting data under the control of the processor 700.

Where in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.

In this way, the network device transmits the PRACH sequence including the basic sequence carrying the identification information of the transmitting end and the extended sequence carrying the extra information of the transmitting end to the receiving end in the random access process, and receives the response message transmitted by the receiving end, so that the PRACH sequence transmitted by the transmitting end in the random access process carries more useful information.

Sixth embodiment

The random access method and the transmitting end of the present invention are described in the first to fifth embodiments respectively with respect to the transmitting end, and the following embodiments further describe the random access method of the receiving end with reference to the drawings and specific application scenarios.

As shown in fig. 8, a sixth embodiment of the present invention provides a random access method, which is applied to a receiving end, and the method includes:

step 801, receiving a physical random access channel PRACH sequence sent by a sending end.

Wherein, the PRACH sequence includes: the PRACH sequence transmitting method includes a basic sequence carrying identification information of a transmitting end and an extension sequence carrying additional information of the transmitting end, wherein the additional information of the transmitting end may include other identification information of the transmitting end, beam information of the transmitting end, and the like, so that the receiving end can obtain more useful information related to the transmitting end when receiving the PRACH sequence, and is convenient for a subsequent response to the PRACH sequence. It should be noted that other identification information in the extra information is different from the identification information carried by the basic sequence, but all of the identification information can be used for identifying the sending end.

In a sixth embodiment of the present invention, the receiving end may be a terminal, such as a smart phone, a tablet computer, or a network device, such as a base station, a core network control node, or the like. If the receiving end is a terminal, the transmitting end is a network device; if the receiving end is a network device, the transmitting end is a terminal.

Step 802, according to the PRACH sequence, a response message is sent to the sending end.

In the sixth embodiment of the present invention, there are three specific implementations of the step 801. The first specific implementation manner is as follows: and directly receiving the PRACH sequence with the overlapped spreading sequence and the basic sequence.

The second specific implementation manner is a time division multiplexing manner, and the method specifically includes the following steps: firstly, receiving a basic sequence at a first preset time; then, according to the basic sequence, channel estimation is carried out to obtain a channel estimation result; and finally, receiving the spreading sequence at a second preset time according to the obtained channel estimation result. The first preset time and the second preset time are negotiated in advance by the receiving end and the transmitting end.

The third specific implementation manner is frequency division multiplexing, and specifically includes the following steps: firstly, receiving a basic sequence in a first preset frequency domain sub-band; then, according to the basic sequence, channel estimation is carried out to obtain a channel estimation result; and finally, receiving the spreading sequence at a second preset frequency domain sub-band according to the obtained channel estimation result. The first preset frequency domain sub-band and the second preset frequency domain sub-band are negotiated in advance by the receiving end and the transmitting end.

It can be seen that, in the sixth embodiment of the present invention, by receiving a PRACH sequence that includes a basic sequence carrying identification information of a transmitting end and an extended sequence carrying additional information of the transmitting end, and sending a response message to the transmitting end according to the PRACH sequence, the transmitting end successfully realizes that the PRACH sequence sent in a random access process carries more useful information.

Seventh embodiment

The sixth embodiment has described the random access method in different scenarios in detail, and the receiving end corresponding to the sixth embodiment will be further described with reference to fig. 9 and fig. 10.

As shown in fig. 9 to 10, a seventh embodiment of the present invention provides a receiving end, where the receiving end 900 includes:

a second receiving module 901, configured to receive a PRACH sequence of a physical random access channel sent by a sending end; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end;

a second sending module 902, configured to send a response message to the sending end according to the PRACH sequence.

The receiving end 900 may be a terminal, such as a smart phone, a tablet computer, or a network device, such as a base station, a core network control node, or the like. If the receiving end is a terminal, the transmitting end is a network device; if the receiving end is a network device, the transmitting end is a terminal.

Optionally, the second receiving module 901 includes:

a first receiving submodule 9011, configured to receive the basic sequence at a first preset time;

a first estimation submodule 9012, configured to perform channel estimation according to the basic sequence to obtain a channel estimation result;

and the second receiving sub-module 9013 is configured to receive the spreading sequence at a second preset time according to the obtained channel estimation result.

Optionally, the second receiving module 901 includes:

a third receiving sub-module 9014, configured to receive the basic sequence in the first preset frequency domain sub-band;

the second estimation submodule 9015 is configured to perform channel estimation according to the basic sequence to obtain a channel estimation result;

and a fourth receiving sub-module 9016, configured to receive the spreading sequence in the second preset frequency domain sub-band according to the obtained channel estimation result.

In the seventh embodiment of the present invention, the receiving end receives the PRACH sequence including the basic sequence carrying the identification information of the transmitting end and the extended sequence carrying the extra information of the transmitting end, and sends a response message to the transmitting end according to the PRACH sequence, so that the PRACH sequence sent by the transmitting end successfully realizes that the PRACH sequence carries more useful information in the random access process.

Eighth embodiment

In order to better achieve the above object, if the receiving end is a network device, as shown in fig. 11, an eighth embodiment of the present invention provides a network device, where the network device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, a user interface 1104, and a bus interface, wherein:

a processor 1101 for reading the program in the memory 1103 and executing the following processes:

receiving a Physical Random Access Channel (PRACH) sequence sent by a sending end; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end; and sending a response message to the sending end according to the PRACH sequence.

In fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1101, and various circuits, represented by memory 1103, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1102 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1104 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing operations.

Optionally, the processor 1101 is further configured to: receiving a basic sequence at a first preset time; performing channel estimation according to the basic sequence to obtain a channel estimation result; and receiving the spreading sequence at a second preset time according to the obtained channel estimation result.

Optionally, the processor 1101 is further configured to: receiving a basic sequence in a first preset frequency domain sub-band; performing channel estimation according to the basic sequence to obtain a channel estimation result; and receiving the spreading sequence at a second preset frequency domain sub-band according to the obtained channel estimation result.

The network equipment of the embodiment of the invention enables the sending end to successfully realize that the PRACH sequence sent in the random access process carries more useful information by receiving the PRACH sequence comprising the basic sequence carrying the identification information of the sending end and the extended sequence carrying the additional information of the sending end and sending a response message to the sending end according to the PRACH sequence.

Ninth embodiment

If the receiving end is a terminal, in order to better achieve the above object, as shown in fig. 12, a ninth embodiment of the present invention provides a terminal, where the terminal 1200 may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), or a vehicle-mounted computer.

The terminal 1200 in fig. 12 includes a Radio Frequency (RF) circuit 1210, a memory 1220, an input unit 1230, a display unit 1240, a processor 1260, an audio circuit 1270, a wifi (wireless fidelity) module 1280, and a power supply 1290.

The input unit 1230 may be used, among other things, to receive numeric or character information input by a user and to generate signal inputs related to user settings and function control of the terminal 1200. Specifically, in the embodiment of the present invention, the input unit 1230 may include a touch panel 1231. The touch panel 1231, also referred to as a touch screen, can collect touch operations of a user (e.g., operations of the user on the touch panel 1231 by using a finger, a stylus pen, or any other suitable object or accessory) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 1231 may include two portions, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device and converts it to touch point coordinates, which are provided to the processor 1260 and can receive commands from the processor 1260 for execution. In addition, the touch panel 1231 may be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1231, the input unit 1230 may also include other input devices 1232, and the other input devices 1232 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

Among other things, the display unit 1240 may be used to display information input by or provided to the user and various menu interfaces of the terminal 1200. The display unit 1240 may include a display panel 1241, and optionally, the display panel 1241 may be configured in the form of an LCD or an Organic Light-Emitting Diode (OLED), or the like.

It should be noted that touch panel 1231 can overlie display panel 1241 to form a touch display screen, and when the touch display screen detects a touch operation thereon or thereabout, the touch display screen can communicate to processor 1260 to determine the type of touch event, and processor 1260 can then provide a corresponding visual output on the touch display screen based on the type of touch event.

The touch display screen comprises an application program interface display area and a common control display area. The arrangement modes of the application program interface display area and the common control display area are not limited, and can be an arrangement mode which can distinguish two display areas, such as vertical arrangement, left-right arrangement and the like. The application interface display area may be used to display an interface of an application. Each interface may contain at least one interface element such as an icon and/or widget desktop control for an application. The application interface display area may also be an empty interface that does not contain any content. The common control display area is used for displaying controls with high utilization rate, such as application icons like setting buttons, interface numbers, scroll bars, phone book icons and the like.

Wherein the processor 1260 is a control center of the terminal 1200, connects various parts of the entire handset using various interfaces and lines, performs various functions of the terminal 1200 and processes data by operating or executing software programs and/or modules stored in the first memory 1221 and calling data stored in the second memory 1222, thereby monitoring the terminal 1200 as a whole. Optionally, processor 1260 may include one or more processing units.

In this embodiment of the present invention, the processor 1260 is configured to receive a physical random access channel PRACH sequence sent by a sending end by calling a software program and/or a module stored in the first memory 1221 and/or data stored in the second memory 1222; wherein, the PRACH sequence comprises: a basic sequence carrying identification information of a sending end and an extension sequence carrying extra information of the sending end; and sending a response message to the sending end according to the PRACH sequence.

Optionally, processor 1260 is further configured to: receiving a basic sequence at a first preset time; performing channel estimation according to the basic sequence to obtain a channel estimation result; and receiving the spreading sequence at a second preset time according to the obtained channel estimation result.

Optionally, processor 1260 is further configured to: receiving a basic sequence in a first preset frequency domain sub-band; performing channel estimation according to the basic sequence to obtain a channel estimation result; and receiving the spreading sequence at a second preset frequency domain sub-band according to the obtained channel estimation result.

It can be seen that, in the ninth embodiment of the present invention, the terminal receives the PRACH sequence including the basic sequence carrying the identification information of the sending end and the extended sequence carrying the additional information of the sending end, and sends the response message to the sending end according to the PRACH sequence, so that the sending end successfully realizes that the PRACH sequence sent in the random access process carries more useful information.

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

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

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

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

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

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

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

Claims

1. A random access method is applied to a sending end, and is characterized in that the method comprises the following steps:

acquiring a Physical Random Access Channel (PRACH) sequence; wherein the PRACH sequence comprises: a basic sequence carrying identification information of the sending end and an extension sequence carrying additional information of the sending end;

sending the PRACH sequence to a receiving end;

receiving a response message sent by the receiving end;

the step of sending the PRACH sequence to a receiving end includes one of the following three schemes:

directly sending the PRACH sequence generated after the extension sequence is superposed on the basic sequence;

the basic sequence is sent at a first preset time, and the extended sequence is sent at a second preset time;

and transmitting the basic sequence in a first preset frequency domain sub-band, and simultaneously transmitting the extended sequence in a second preset frequency domain sub-band.

2. The method of claim 1, wherein the step of acquiring a Physical Random Access Channel (PRACH) sequence comprises:

generating the basic sequence according to the ZC sequence;

generating the extended sequence according to the ZC sequence;

and superposing the extended sequence to the basic sequence to generate the PRACH sequence.

3. The method of claim 2,

the ZC sequencex_u(N) denotes a ZC sequence, u denotes the number of a root sequence, N_ZCDenotes the sequence length, N denotes the nth sample point of the sequence, j denotes the imaginary unit, and u and N_ZCAre all configured and obtained according to the sequence information issued by the receiving end in advance.

4. The method according to claim 3, wherein the step of generating the base sequence according to the ZC sequence comprises:

by the formulaGenerating the base sequence;

wherein S is₁Representing a base sequence, beta a first preset weight value,number u representing root sequence₀X of_u(n) cyclic shift of offset bits of the sequence, and u₀And the offset is obtained according to the sequence information configuration.

5. The method as claimed in claim 3, wherein the step of generating the spreading sequence according to the ZC sequence comprises:

generating the spreading sequence by mapping the additional information of the transmitting end to at least two ZC sequences; or

And generating the spreading sequence by mapping the additional information of the transmitting end to a ZC sequence.

6. The method as claimed in claim 5, wherein the step of generating the spreading sequence by mapping the additional information of the transmitting end to at least two ZC sequences comprises:

by the formulaGenerating the spreading sequence;

wherein S is₂Denotes a spreading sequence, K denotes the number of subsequences included in the spreading sequence, K is N/Q, N denotes the number of bits of the extra information, Q denotes the modulation order of QAM modulation, K denotes the number of subsequences, β denotes the number of subsequences_kA second preset weight value representing the kth sub-sequence,number w representing root sequence₀(k) X of_uOffset of (n) sequence_kThe bits are cyclically shifted in a cyclic manner,A₀(m) represents the additional information of the transmitting end carried by the mth sub-sequence, W_kmRepresents a K matrix, and K, Q, offset_kAnd W_kmAre all configured and obtained according to the sequence information.

7. The method as claimed in claim 5, wherein the step of generating the spreading sequence by mapping the additional information of the transmitting end to a ZC sequence comprises:

determining the number k of the ZC sequence corresponding to the format of the extra information of the sending end according to the corresponding relation between the format of the extra information stored in advance and the number of the ZC sequence;

by the formula S₃＝β_k·y_k(n,offset_k) Generating the spreading sequence;

wherein S is₃Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kBit cyclic shift, β_kRepresents a third preset weight value, K ═ 2^NN represents the number of bits of the extra information of the transmitting end, and K ZC sequences and offsets_k、β_kAre all configured and obtained according to the sequence information.

8. The method as claimed in claim 5, wherein the step of generating the spreading sequence by mapping the additional information of the transmitting end to a ZC sequence comprises:

determining the number k of the ZC sequence corresponding to the format of the first part of extra information of the sending end according to the corresponding relation between the format of the pre-stored extra information and the number of the ZC sequence;

determining the extra information of the sending end according to the corresponding relation between the format of the pre-stored extra information and the constellation symbolConstellation symbol s corresponding to format of second part of additional information except the first part of additional information₂；

By the formula S₄＝β_k·s₂·y_k(n,offset_k) Generating the spreading sequence;

wherein S is₄Denotes a spreading sequence, y_k(n) denotes a kth ZC sequence of K ZC sequences, y_k(n,offset_k) Denotes y_kOffset of (n)_kThe bits are cyclically shifted in a cyclic manner,N₁the number of bits, β, representing the first part of the extra information_kRepresents a fourth predetermined weight value, and K ZC sequences, offset_k、β_kAre all configured and obtained according to the sequence information.

9. A transmitting end, characterized in that the transmitting end comprises:

an acquisition module, configured to acquire a physical random access channel PRACH sequence; wherein the PRACH sequence comprises: a basic sequence carrying identification information of the sending end and an extension sequence carrying additional information of the sending end;

a first sending module, configured to send the PRACH sequence to a receiving end;

the first receiving module is used for receiving the response message sent by the receiving end;

the first transmitting module comprises one of the following three sub-modules:

the first sending submodule is used for directly sending the PRACH sequence generated after the extended sequence is superposed on the basic sequence;

the second sending submodule is used for sending the basic sequence at a first preset time and sending the extended sequence at a second preset time;

and the third sending submodule is used for sending the basic sequence in the first preset frequency domain sub-band and simultaneously sending the spreading sequence in the second preset frequency domain sub-band.

10. The sender according to claim 9, wherein the obtaining module includes:

the first generation submodule is used for generating the basic sequence according to the ZC sequence;

a second generation submodule, configured to generate the spreading sequence according to the ZC sequence;

and the superposition submodule is used for superposing the extended sequence to the basic sequence to generate the PRACH sequence.

11. The transmitting end according to claim 10,

12. The transmitting end according to claim 11, characterized in that the first generation submodule is specifically configured to pass through a formulaGenerating the base sequence;

13. The transmitting end of claim 11, wherein the second generating submodule comprises:

a first generating unit, configured to generate the spreading sequence by mapping additional information of the transmitting end to at least two ZC sequences; or

A second generating unit, configured to generate the spreading sequence by mapping the extra information of the transmitting end to a ZC sequence.

14. Transmitting end according to claim 13, characterized in that the first generating unit is specifically configured to use the formulaGenerating the spreading sequence;

15. A transmitting end according to claim 13, characterized in that the second generating unit comprises:

a first determining subunit, configured to determine, according to a correspondence between a format of pre-stored extra information and a number of a ZC sequence, a number k of the ZC sequence corresponding to the format of the extra information of the transmitting end;

first of allA generating subunit for passing formula S₃＝β_k·y_k(n,offset_k) Generating the spreading sequence;

16. A transmitting end according to claim 13, characterized in that the second generating unit comprises:

a second determining subunit, configured to determine, according to a correspondence between a format of pre-stored extra information and a number of a ZC sequence, a number k of the ZC sequence corresponding to a format of a first part of extra information of the transmitting end;

a third determining subunit, configured to determine, according to a correspondence between formats of pre-stored extra information and constellation symbols, constellation symbols s corresponding to formats of a second part of extra information, except the first part of extra information, in the extra information of the sending end₂；

A second generation subunit for generating the second expression S₄＝β_k·s₂·y_k(n,offset_k) Generating the spreading sequence;

17. A random access method is applied to a receiving end, and is characterized in that the method comprises the following steps:

receiving a Physical Random Access Channel (PRACH) sequence sent by a sending end; wherein the PRACH sequence comprises: a basic sequence carrying identification information of the sending end and an extension sequence carrying additional information of the sending end;

sending a response message to the sending end according to the PRACH sequence;

the step of receiving the physical random access channel PRACH sequence sent by the sending end comprises one of the following three schemes:

directly receiving a PRACH sequence generated after the extension sequence is superposed on the basic sequence;

receiving the basic sequence at a first preset time, and receiving the extended sequence at a second preset time;

receiving the base sequence at a first predetermined frequency domain sub-band, and simultaneously receiving the spreading sequence at a second predetermined frequency domain sub-band.

18. The method of claim 17, wherein the step of receiving the base sequence at a first predetermined time and receiving the spreading sequence at a second predetermined time comprises:

receiving the basic sequence at a first preset time;

performing channel estimation according to the basic sequence to obtain a channel estimation result;

and receiving the spreading sequence at a second preset time according to the obtained channel estimation result.

19. The method according to claim 17, wherein the step of receiving the base sequence at a first predetermined frequency-domain sub-band and simultaneously receiving the spreading sequence at a second predetermined frequency-domain sub-band comprises:

receiving the base sequence at a first preset frequency domain sub-band;

and receiving the spreading sequence at a second preset frequency domain sub-band according to the obtained channel estimation result.

20. A receiving end, comprising:

the second receiving module is used for receiving a Physical Random Access Channel (PRACH) sequence sent by the sending end; wherein the PRACH sequence comprises: a basic sequence carrying identification information of the sending end and an extension sequence carrying additional information of the sending end;

a second sending module, configured to send a response message to the sending end according to the PRACH sequence;

the second receiving module comprises one of the following three sub-modules:

the first receiving submodule is used for directly receiving the PRACH sequence generated after the extended sequence is superposed on the basic sequence;

the second receiving submodule is used for receiving the basic sequence at a first preset time and receiving the extended sequence at a second preset time;

and the third receiving sub-module is used for receiving the basic sequence at the first preset frequency domain sub-band and simultaneously receiving the spreading sequence at the second preset frequency domain sub-band.

21. The receiving end of claim 20, wherein the second receiving sub-module is further configured to:

and receiving the basic sequence at a first preset time, performing channel estimation according to the basic sequence to obtain a channel estimation result, and receiving the extended sequence at a second preset time according to the obtained channel estimation result.

22. The receiving end of claim 20, wherein the third receiving sub-module is further configured to:

and receiving the basic sequence at a first preset frequency domain sub-band, performing channel estimation according to the basic sequence to obtain a channel estimation result, and receiving the extended sequence at a second preset frequency domain sub-band according to the obtained channel estimation result.