CN104581983A - A random access method, device and system - Google Patents

Abstract

The embodiment of the invention discloses a random accessing method, a random accessing device and a random accessing system. The random accessing method comprises the following steps: receiving random accessing information which is sent by user side equipment through a physical random accessing channel; judging whether a leader sequence in the random accessing information is an effective leader sequence or not according to a pre-set leader sequence detection rule; judging whether user side equipment marker information in the random accessing information is correctly analyzed or not according to a check code sent by the user side equipment; sending a random accessing response to the user side equipment through a physical downlink channel under the conditions that the leader sequence is effective and the user side equipment marker is correctly analyzed; receiving dispatching information and/or business data information sent by a physical uplink sharing channel distributed by the user side equipment through network side equipment; and sending feedback information to the user side equipment according to the accuracy of the received dispatching information and/or business data information. With the adoption of the scheme provided by the embodiment, the utilization rate of the physical uplink sharing channel can be improved.

Description

A random access method, device and system

technical field

The present invention relates to the field of wireless communication, in particular to a random access method, device and system.

Background technique

Random access is a basic and very important process in a communication system, which can be divided into: competitive random access and non-competitive random access. Among them, the competitive random access means that after the user-side device randomly selects a preamble sequence, it sends the selected preamble sequence to the network-side device to try to access the network until it establishes a basic signaling connection with the network. the process of.

Taking the user-side device as a mobile phone and the network-side device as a base station as an example, in the prior art, in an LTE (LongTerm Evolution, Long Term Evolution) system, competitive random access is generally implemented through the following steps:

The mobile phone randomly selects the preamble sequence, and sends the selected preamble sequence to the base station through PRACH (Physical Random Access Channel, Physical Random Access Channel);

After receiving the preamble sequence sent by the mobile phone, the base station sends a random access response to the mobile phone through PDSCH (Physical Downlink Shared Channel), wherein the random access response includes: the base station allocates for the mobile phone to send scheduling information PUSCH (Physical Uplink SharedChannel, Physical Uplink Shared Channel) identification, etc.;

The mobile phone sends scheduling information to the base station according to the channel PUSCH allocated by the base station;

The base station sends contention resolution information to the mobile phone according to the received scheduling information.

After the above four steps, the competitive random access process is completed. Under normal circumstances, through the above steps, the mobile phone can successfully access the network. However, when two or more mobile phones select the same preamble sequence at the same time, since the preamble sequences sent by each mobile phone to the base station are the same, the base station feeds back the preamble sequence to each mobile phone. The random access response is also the same. In this way, each mobile phone sends scheduling information to the base station through the same PUSCH, and multiple scheduling information interferes with each other. The base station cannot successfully parse each scheduling information, resulting in failure of each mobile phone to access the network. When the mobile phone frequently selects the same preamble sequence for random access at the same time, the success rate of accessing the network is low, and the utilization rate of PUSCH for sending scheduling information is low.

Contents of the invention

The embodiment of the invention discloses a random access method, device and system to improve the utilization rate of physical uplink shared channel channel resources.

In order to achieve the above purpose, the embodiment of the present invention discloses a random access method, which is applied to network side equipment, and the method includes:

Receiving random access information sent by the user-side device through a physical random access channel PRACH, wherein the random access information includes: a preamble, user-side device identification information, and a check code of the user-side device identification;

Judging whether the preamble contained in the random access information is a valid preamble according to a preset preamble detection rule, wherein the valid preamble is one of predefined candidate preambles;

According to the check code of the user-side device identifier, detect whether the user-side device identifier obtained by parsing the user-side device identifier information is correct;

In the case that the preamble sequence is valid and the user-side device identity obtained by parsing is correct, send a random access response to the user-side device through a physical downlink channel, wherein the random access response includes: the network side The identification of the physical uplink shared channel PUSCH allocated by the device to the user-side device for sending scheduling information and/or service data information;

receiving scheduling information and/or service data information sent by the user-side device through the PUSCH allocated by the network-side device;

According to the correctness of the received scheduling information and/or service data information, feedback information is sent to the user side equipment.

In a specific implementation manner of the present invention, the number of bits of the user-side device identification information contained in the random access information and the number of bits of the check code of the user-side device identification are:

a predetermined amount; or

The number determined by the network side device and sent to the user side device through the broadcast channel or downlink control channel.

In a specific implementation of the present invention, the positions of the user-side device identification information and the user-side device identification check code contained in the random access information in the PRACH frequency domain are:

a predetermined location; or

It is determined by the network-side device and sent to the user-side device through a broadcast channel or a downlink control channel.

In order to achieve the above purpose, the embodiment of the present invention discloses a random access method, which is applied to user-side equipment, and the method includes:

Sending random access information to the network side device through the PRACH, wherein the random access information includes: a preamble sequence, user side device identification information, and a verification code of the user side device identification;

Receive a random access response sent by the network side device through a physical downlink channel, where the random access response includes: the network side device allocated for the user side device for sending scheduling information and/or PUSCH identification of service data information;

sending scheduling information and/or service data information to the network side device through the PUSCH allocated by the network side device;

and receiving feedback information sent by the network side device for scheduling information and/or service data information.

In a specific implementation of the present invention, the sending random access information to the network side device through the PRACH includes:

Mapping the preamble sequence contained in the random access information, the user-side device identification information and the check code of the user-side device identification to the subcarriers of the PRACH in the frequency domain;

Send the above information mapped to the subcarriers to the network side device.

In a specific implementation manner of the present invention, the number of bits of the user-side device identification information contained in the random access information and the number of bits of the check code of the user-side device identification are:

a predetermined amount; or

The number sent by the network side device through the broadcast channel or downlink control channel.

In a specific implementation of the present invention, the subcarriers used to map the user-side device identification information contained in the random access information and the check code of the user-side device identification are located in the PRACH frequency domain as follows:

a predetermined location; or

The location sent by the network side device through broadcast channel or downlink control channel.

In order to achieve the above purpose, the embodiment of the present invention discloses a random access device, which is applied to network side equipment, and the device includes:

The random access information receiving module is configured to receive random access information sent by the user-side device through the PRACH, wherein the random access information includes: a preamble sequence, user-side device identification information, and a verification code of the user-side device identification ;

A preamble judging module, configured to judge whether the preamble included in the random access information is a valid preamble according to a preset preamble detection rule, wherein the valid preamble is one of the predefined candidate preambles one;

The parsing result detection module is used to detect whether the user-side device identifier obtained by parsing the user-side device identifier information is correct according to the check code of the user-side device identifier;

A random access response sending module, configured to send a random access response to the user side device through a physical downlink channel when the judgment result of the preamble judgment module is yes and the detection result of the analysis result detection module is yes. An access response, wherein the random access response includes: an identifier of a PUSCH allocated by the network side device to the user side device for sending scheduling information and/or service data information;

A PUSCH information receiving module, configured to receive scheduling information and/or service data information sent by the user-side device through the PUSCH allocated by the network-side device;

The feedback information sending module is configured to send feedback information to the user side equipment according to the correctness of the received scheduling information and/or service data information.

In order to achieve the above purpose, the embodiment of the present invention discloses a random access device, which is applied to user-side equipment, and the device includes:

A random access information sending module, configured to send random access information to the network side device through the PRACH, wherein the random access information includes: a preamble sequence, user side device identification information, and a verification code of the user side device identification;

A random access response receiving module, configured to receive a random access response sent by the network side device through a physical downlink channel, wherein the random access response includes: the network side device allocated for the user side device . An identifier of the PUSCH used to send scheduling information and/or service data information;

A PUSCH sending module, configured to send scheduling information and/or service data information to the network side device through the PUSCH allocated by the network side device;

The feedback information receiving module is configured to receive feedback information for scheduling information and/or service data information sent by the network side device.

In order to achieve the above purpose, the embodiment of the present invention discloses a random access system, the system includes:

A network-side device to which the above-mentioned random access apparatus applied to network-side equipment is applied, and a user-side device to which the above-mentioned random access apparatus applied to user-side equipment is applied.

It can be seen from the above that in the solution provided by the embodiment of the present invention, after receiving the random access information sent by the user side equipment through the PRACH, the network side device judges whether the preamble sequence contained in the random access information is a valid preamble sequence, and judges Whether the user-side device ID can be correctly parsed. If it is judged that the preamble is valid and the parsed user-side device ID is correct, it means that only one user-side device has selected the preamble. At this time, send a random access message to the user-side device. response. Compared with the prior art, in the solution provided by the embodiment of the present invention, the network side device analyzes the PRACH and judges that only one user side device selects the preamble sequence contained in the current random access information. The user side equipment allocates a PUSCH for sending scheduling information and/or service data information, and sends a random access response to the user side equipment. In this way, the access failure caused by multiple user-side devices sending scheduling information and/or service data information to the same PUSCH is avoided, and the utilization rate of the PUSCH used to send scheduling information and/or service data information is improved. The number of access terminals.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a random access system provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a signaling flow of a random access system provided by an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a random access method provided by an embodiment of the present invention;

FIG. 4 is a schematic flowchart of another random access method provided by an embodiment of the present invention;

FIG. 5 is a mapping relationship diagram between random access information and subcarriers provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a random access device provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another random access apparatus provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

FIG. 1 is a schematic structural diagram of a random access system provided by an embodiment of the present invention. The system includes: a network-side device 101 and a user-side device 102 .

The random access process is the first step for the user-side device to access the network. In the random access system provided in this embodiment, the specific implementation is as follows:

Referring to FIG. 2 , FIG. 2 is a schematic diagram of a signaling flow of a random access system provided by an embodiment of the present invention.

Among them, the user-side device 102 first sends random access information to the network-side device 101 through the PRACH (S201), wherein the random access information not only includes the preamble sequence with the same meaning as in the prior art, but also includes at least the user-side device identification information and the verification code of the user-side device identification; after receiving the above-mentioned random access information, the network-side device 101 can judge whether the preamble sequence contained in the random access information is a valid preamble sequence according to the preset preamble sequence detection rules (S202); The network side equipment 101 detects whether the user side equipment identification obtained by parsing the user side equipment identification information is correct (S203) according to the check code of the user side equipment identification included in the random access information; if above-mentioned S202 judges The preamble sequence is an effective preamble sequence, and the detection result of the above S203 shows that the analyzed user-side device identifier is correct, then the network-side device 101 sends a random access response to the user-side device 102 through the physical downlink channel (S204), wherein, The random access response at least includes: the identification of the PUSCH allocated by the network-side device 101 to the user-side device 102 for sending scheduling information and/or service data information; After sending the random access response (S204), in the above-mentioned random access system, the user-side device 102 can send scheduling information and/or service data information to the network-side device 101 through the PUSCH allocated by the network-side device 101 (S205); After receiving the scheduling information and/or service data information, the network-side device 101 may also send feedback information to the user-side device 102 according to the correctness of the received information (S206).

Specifically, when the user-side device 102 sends random access information to the network-side device 101 through the PRACH, the user-side device 102 may first transmit the preamble sequence contained in the random access information, the user-side device identification information, and the user-side device identification The check code is mapped to the subcarriers of the PRACH in the frequency domain; and then the above information mapped to the subcarriers is sent to the network side device 101 .

Preferably, the subcarriers used to map the preamble may be a preset number of subcarriers located in the middle of the PRACH frequency domain. The position of the subcarrier used to map the user-side device identification information and the check code of the user-side device identity is adjacent to the position of the sub-carrier used to map the preamble.

Specifically, the number of bits of the identification information of the user-side equipment contained in the random access information and the number of bits of the verification code of the identification of the user-side equipment can be: a preset number, or the number of bits that the network-side equipment can pass through a broadcast channel or downlink The number of control channel sends.

The subcarrier used to map the user-side device identification information contained in the random access information and the check code of the user-side device identification, the position in the PRACH frequency domain can be: a preset position, or it can be determined by the network side The location sent by the device through the broadcast channel or downlink control channel.

In this embodiment, the network side device 101 may be a base station, a relay, an access point, etc., and this application does not limit the specific form of the network side device.

It can be seen from the above that in the solution provided by this embodiment, after receiving the random access information sent by the user side equipment through the PRACH, the network side device judges whether the preamble sequence contained in the random access information is a valid preamble sequence, and judges whether The user-side device ID can be correctly parsed. If it is judged that the preamble is valid and the parsed user-side device ID is correct, it means that only one user-side device has selected the preamble. At this time, send a random access message to the user-side device. response. Compared with the prior art, in the solution provided by this embodiment, the network side device analyzes the PRACH and judges that only one user side device selects the preamble sequence contained in the current random access information, then it is the user side device. The device allocates a PUSCH for sending scheduling information and/or service data information, and sends a random access response to the user-side device, thus avoiding that multiple user-side devices send scheduling information and/or service data information to the same PUSCH The resulting access failure increases the utilization rate of the PUSCH for sending scheduling information and/or service data information, and increases the number of access terminals.

Corresponding to the above random access system, an embodiment of the present invention provides a random access method.

Fig. 3 is a schematic flowchart of a random access method provided by an embodiment of the present invention, the method is applied to a network side device, including:

S301: Receive random access information sent by a user side device through a physical random access channel PRACH.

Wherein, the random access information includes at least: a preamble, user-side device identification information, and a check code of the user-side device ID. Of course, the random access information may also include other information, which is not limited in this application.

Optionally, the number of bits of the user-side device identification information and the number of bits of the check code of the user-side device identification included in the random access information may be a preset number, or may be determined by the network-side device, and The number sent to user-side equipment through the broadcast channel or downlink control channel.

The position of the user-side device identification information and the check code of the user-side device identification included in the above random access information in the PRACH frequency domain may be a preset position, or may be determined by the network-side device and passed The broadcast channel or downlink control channel is sent to the location of the user-side equipment.

Specifically, in order to facilitate the network-side device to detect whether there is a data transmission error in the received user-side device identification information, before the user-side device sends random access information, it usually performs verification processing on the user-side device identification, and then performs Channel coding, modulation and other processing. That is to say, the identification information of the user-side device may be information obtained after processing such as verification, channel coding, and modulation on an identifier capable of uniquely identifying the user-side device. Wherein, the identifier that can uniquely identify the user-side device can be one or more of the device's IMEI (International Mobile Equipment Identity, mobile equipment international identity code), MAC (Media Access Control, media access control) address and other information .

A more common check processing is CRC (Cyclic Redundancy Check, cyclic redundancy check) processing, and a check code obtained through the check processing may be called a CRC code. Certainly, the specific form of the verification process is not limited in this application.

S302: Determine whether the preamble contained in the random access information is a valid preamble according to a preset preamble detection rule, if it is a valid preamble, perform S303, and if not, perform S307.

Wherein, the above effective preamble sequence is one of the predefined candidate preamble sequences.

That is to say, the above determination of whether the preamble contained in the random access information is a valid preamble can be understood as: determining whether the preamble contained in the random access information is one of the predefined candidate preambles.

Optionally, numerical detection may be performed on the preamble sequence contained in the random access information to determine whether the detected peak value is greater than a preset threshold, and if it is greater than the preset threshold value, it is considered that the preamble sequence contained in the random access information is Valid leader sequence.

S303: According to the verification code of the user-side device identifier, check whether the user-side device identifier obtained by analyzing the user-side device identifier information is correct, if correct, perform S304, and if not, perform S307.

It can be known from the foregoing description that the user-side device identifier in this embodiment is an identifier that can uniquely identify the user-side device, and the user-side device identifier obtained through analysis can uniquely determine the user-side device. When multiple user-side devices select the same preamble at the same time, since these user-side devices will simultaneously send random access information to the network-side device through the PRACH, co-channel interference will be generated between these random access information, so that the network side The device cannot correctly resolve the identity of each user-side device. On the contrary, if the network-side device can correctly parse and obtain the identifier of the user-side device, it means that only one user-side device has selected the preamble included in the random access information.

It should be noted that the present application does not limit the execution sequence of S302 and S303 described above, and S303 may be executed after S302, or may be executed before S302, or may be executed simultaneously with S302.

S304: In the case that the preamble sequence is valid and the user book device identifier obtained through parsing is correct, send a random access response to the user side device through the physical downlink channel.

Wherein, the random access response includes: an identifier of the PUSCH allocated by the network side equipment to the user side equipment for sending scheduling information and/or service data information.

Preferably, the physical downlink channel used for sending the random access response to the user side equipment is PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) and/or PDSCH.

In addition, in addition to the above information, the random access response may also include information such as preamble identifiers detected by the network side, timing adjustment information, and cell wireless network identifiers temporarily allocated.

S305: Receive scheduling information and/or service data information sent by the user-side device through the PUSCH allocated by the network-side device.

After the above judgments in S302 and S303, it can be determined that only one user-side device selects the preamble sequence included in the random access information of S301, so there will not be a situation where multiple user-side devices share the same PUSCH, that is, In other words, when the user side equipment transmits scheduling information and/or service data information through the PUSCH allocated by the network side equipment, there will be no mutual interference between the information.

S306: Send feedback information to the user side device according to the correctness of the received scheduling information and/or service data information.

If the information received by the network-side device includes scheduling information, the feedback information sent to the user-side device includes a contention resolution message; if the information received by the network-side device includes service data information, the feedback information sent to the user-side device Contains information about whether the received business data information is correct or incorrect.

In a specific application, when the user-side device does not receive the contention resolution message, it can be considered that there may be a situation where multiple user-side devices have selected the same preamble at the same time, so that a new preamble can be reselected, and the process can be performed again. random access.

S307: End this process.

If it is determined in S302 above that the preamble included in the random access information is not a valid preamble, the user side device may be prompted to reselect a new preamble and perform random access again.

When it is judged in S303 above that the network-side device cannot correctly resolve the user-side device identifier, the network-side device does not need to allocate a PUSCH for sending scheduling information and/or service data information to the user-side device, which can save PUSCH resources, At the same time, there is no need to send a random access response to the user side equipment. If the user-side device does not receive a random access response, it can be considered that the random access has failed, and a new preamble sequence can be selected to perform random access again.

It can be seen from the above that in the solution provided by this embodiment, after receiving the random access information sent by the user side equipment through the PRACH, the network side device judges whether the preamble sequence contained in the random access information is a valid preamble sequence, and judges whether The user-side device ID can be correctly parsed. If it is judged that the preamble is valid and the parsed user-side device ID is correct, it means that only one user-side device has selected the preamble. At this time, send a random access message to the user-side device. response. Compared with the prior art, in the solution provided by this embodiment, the network side device analyzes the PRACH and judges that only one user side device selects the preamble sequence contained in the current random access information, then it is the user side device. The device allocates a PUSCH for sending scheduling information and/or service data information, and sends a random access response to the user-side device, thus avoiding that multiple user-side devices send scheduling information and/or service data information to the same PUSCH The resulting access failure increases the utilization rate of the PUSCH for sending scheduling information and/or service data information, and increases the number of access terminals.

Corresponding to the above random access system, the embodiment of the present invention also provides another random access method.

FIG. 4 is another random access method provided by an embodiment of the present invention. The method is applied to a user-side device, including:

S401: Send random access information to the network side device through the PRACH.

Wherein, the random access information includes at least: a preamble, user-side device identification information, and a check code of the user-side device ID. Of course, the random access information may also include other information, which is not limited in this application.

Those skilled in the art can understand that the PRACH generally occupies the bandwidth of several resource blocks in the frequency domain, and each resource block has several subcarriers. For example, in the LTE system, the PRACH occupies 6 resources in the frequency domain block, and each resource block has 144 subcarriers, then the PRACH has a total of 144x6=864 subcarriers in the frequency domain.

In addition, in the LTE system, for the preamble sequence formats 0-3, when using a ZC (Zadoff-Chu) sequence with a length of 839, if each subcarrier loads a data of the sequence, then loading the ZC sequence requires a total of 839 subcarriers , so that only 25 subcarriers remain in the 864 subcarriers, and these 25 subcarriers can be used as guard intervals.

In a preferred embodiment of the present invention, when sending the random access information to the network side equipment through the PRACH, the preamble sequence contained in the random access information, the user side equipment identification information and the verification of the user side equipment identification The codes are mapped to the subcarriers of the PRACH in the frequency domain, and then the above information mapped to the subcarriers is sent to the network side device.

Preferably, the subcarriers used to map the preamble may be a preset number of subcarriers located in the middle of the PRACH frequency domain. The other sub-carriers in the PRACH frequency domain are called guard intervals. Specifically, the sub-carriers in the guard interval are used to map the user-side device identification information and the check code of the user-side device identification. The above-mentioned sub-carrier positions are used to map the preamble sequence The positions of the subcarriers are adjacent.

Specifically, the number of bits used to map the user-side device identification information contained in the random access information and the number of bits of the check code of the user-side device identification may be a preset number, or may be broadcast by the network-side device channel or the number of downlink control channel transmissions.

The subcarrier used to map the user-side device identification information contained in the random access information and the check code of the user-side device identification, the position in the PRACH frequency domain can be a preset position, or can be determined by the network-side device The location sent via broadcast channel or downlink control channel.

Specifically, refer to FIG. 5 . FIG. 5 is a mapping relationship diagram between random access information and subcarriers provided by an embodiment of the present invention.

Among them, the preamble sequence is mapped to the middle 839 subcarriers in the PRACH frequency domain, and the user-side device identification information and the check code of the user-side device identification are mapped to n (n≥1) subcarriers on the left and right sides of the above-mentioned 839 subcarriers.

Of course, FIG. 5 is only a specific mapping relationship in this application, and the mapping relationship between random access information and subcarriers in practical applications is not limited to this.

S402: Receive a random access response sent by the network side device through a physical downlink channel.

Wherein, the random access response includes: an identifier of the PUSCH allocated by the network side equipment to the user side equipment and used for sending scheduling information and/or service data information.

In addition, in addition to the above information, the random access response may also include information such as preamble identifiers detected by the network side, timing adjustment information, and cell wireless network identifiers temporarily allocated.

Optionally, the aforementioned physical downlink channel used for sending the random access response may be a PDSCH.

Specifically, after receiving the random access information, the network side device first judges whether the preamble sequence contained in the random access information is a valid preamble sequence according to the preset preamble sequence detection rules, and according to the verification code of the user side device identification, Detect whether the user-side device identification obtained by parsing the user-side device identification information is correct. If the above-mentioned preamble sequence is valid and the user-side device identification obtained by parsing is correct, the user-side device is allocated for sending scheduling information and/or service data. information, and send a random access response to the user side equipment through the physical downlink channel.

S403: Send scheduling information and/or service data information to the network side device through the PUSCH allocated by the network side device.

S404: Receive feedback information for scheduling information and/or service data information sent by the network side device.

It can be seen from the above that in the solution provided by this embodiment, the random access information sent by the user-side device to the network-side device through the PRACH includes not only the preamble sequence, but also the identification information of the user-side device and the verification of the user-side device ID. In this way, after the network side equipment receives the random access information, it judges that the above preamble sequence is a valid preamble sequence, and according to the check code of the user side equipment identification, it judges that the user side equipment identification can be correctly parsed In this case, it means that only one user-side device has selected the preamble sequence, and at this time, a random access response is sent to the user-side device. Compared with the prior art, in the solution provided by this embodiment, since the network side device can determine whether only one user side device has selected the above preamble sequence according to the received random access information, and only if it is judged, only one When the user-side device selects the preamble sequence contained in the current random access information, the user-side device is allocated a PUSCH for sending scheduling information and/or service data information, and sends a random access response to the user-side device, In this way, access failure caused by multiple user-side devices sending scheduling information and/or service data information to the same PUSCH is avoided, and the utilization rate of the PUSCH used to send scheduling information and/or service data information is improved. The number of access terminals.

Corresponding to the above random access system and random access method, an embodiment of the present invention also provides a random access device.

Fig. 6 is a random access device provided by an embodiment of the present invention, which is applied to network-side equipment and includes: a random access information receiving module 601, a preamble sequence judgment module 602, an analysis result detection module 603, a random access response A sending module 604 , a PUSCH information receiving module 605 and a feedback information sending module 606 .

Wherein, the random access information receiving module 601 is configured to receive random access information sent by the user-side device through the PRACH, wherein the random access information includes: preamble sequence, user-side device identification information, and user-side device identification checksum;

A preamble judging module 602, configured to judge whether the preamble included in the random access information is an effective preamble according to a preset preamble detection rule, wherein the effective preamble is one of the predefined candidate preambles one of;

The parsing result detection module 603 is used to detect whether the user-side device identification obtained by parsing the user-side device identification information is correct according to the check code of the user-side device identification;

A random access response sending module 604, configured to send the response to the user side device through the physical downlink channel when the judgment result of the preamble sequence judging module is Yes, and the detection result of the parsing result detection module is Yes. A random access response, wherein the random access response includes: an identifier of a PUSCH allocated by the network side device to the user side device for sending scheduling information and/or service data information;

A PUSCH information receiving module 605, configured to receive scheduling information and/or service data information sent by the user-side device through the PUSCH allocated by the network-side device;

The feedback information sending module 606 is configured to send feedback information to the user side equipment according to the correctness of the received scheduling information and/or service data information.

Specifically, the number of bits of the identification information of the user-side equipment included in the random access information and the number of bits of the verification code of the identification of the user-side equipment may be a preset number, or may be determined by the network-side equipment, and The number sent to user-side equipment through the broadcast channel or downlink control channel.

Specifically, the position of the user-side device identification information and the check code of the user-side device identification included in the random access information in the PRACH frequency domain may be a preset position, or may be determined by the network-side device , and send it to the location of the user-side device through a broadcast channel or a downlink control channel.

It can be seen from the above that in the solution provided by this embodiment, after receiving the random access information sent by the user side equipment through the PRACH, the network side device judges whether the preamble sequence contained in the random access information is a valid preamble sequence, and judges whether The user-side device ID can be correctly parsed. If it is judged that the preamble is valid and the parsed user-side device ID is correct, it means that only one user-side device has selected the preamble. At this time, send a random access message to the user-side device. response. Compared with the prior art, in the solution provided by this embodiment, the network side device analyzes the PRACH and judges that only one user side device selects the preamble sequence contained in the current random access information, then it is the user side device. The device allocates a PUSCH for sending scheduling information and/or service data information, and sends a random access response to the user-side device, thus avoiding that multiple user-side devices send scheduling information and/or service data information to the same PUSCH The resulting access failure can increase the utilization rate of the PUSCH for sending scheduling information and/or service data information, and increase the number of access terminals.

Corresponding to the above random access system and random access method, the embodiment of the present invention also provides another random access device.

Fig. 7 is a schematic structural diagram of another random access device provided by an embodiment of the present invention, which is applied to user-side equipment, and includes: a random access information sending module 701, a random access response receiving module 702, and a PUSCH sending module 703 and a feedback information receiving module 704 .

Wherein, the random access information sending module 701 is configured to send random access information to the network side device through the PRACH, wherein the random access information includes: preamble sequence, user side device identification information and user side device identification calibration check code;

A random access response receiving module 702, configured to receive a random access response sent by the network side device through a physical downlink channel, wherein the random access response includes: the network side device assigns the user side device The identifier of the PUSCH used to send scheduling information and/or service data information;

A PUSCH sending module 703, configured to send scheduling information and/or service data information to the network side device through the PUSCH allocated by the network side device;

The feedback information receiving module 704 is configured to receive feedback information for scheduling information and/or service data information sent by the network side device.

Specifically, the aforementioned random access information sending module 701 may include: an information mapping submodule and an information sending submodule (not shown in the figure).

Wherein, the information mapping submodule is used to map the preamble sequence contained in the random access information, the user-side device identification information and the check code of the user-side device identification to the subcarriers of the PRACH in the frequency domain;

The information sending sub-module is configured to send the above information mapped to the subcarriers to the network side device.

Optionally, the above-mentioned number of bits used to map the user-side device identification information contained in the random access information and the number of bits of the check code of the user-side device identification may be:

a predetermined amount; or

The number sent by the network side device through the broadcast channel or downlink control channel.

Optionally, the position of the subcarriers used for mapping the user-side device identification information and the check code of the user-side device identification included in the random access information in the PRACH frequency domain may be:

a predetermined location; or

The location sent by the network side device through broadcast channel or downlink control channel.

It can be seen from the above that in the solution provided by this embodiment, the random access information sent by the user-side device to the network-side device through the PRACH includes not only the preamble sequence, but also the identification information of the user-side device and the verification of the user-side device ID. In this way, after the network side equipment receives the random access information, it judges that the above preamble sequence is a valid preamble sequence, and according to the check code of the user side equipment identification, it judges that the user side equipment identification can be correctly parsed In this case, if the user-side device identifier can be correctly parsed, it means that only one user-side device has selected the preamble, and at this time, a random access response is sent to the user-side device. Compared with the prior art, in the solution provided by this embodiment, since the network side device can judge whether only one user side device has selected the above preamble sequence according to the received random access information, and only if it is judged, only one When the user-side device selects the preamble sequence contained in the current random access information, the user-side device is allocated a PUSCH for sending scheduling information and/or service data information, and sends a random access response to the user-side device, In this way, access failure caused by multiple user-side devices sending scheduling information and/or service data information to the same PUSCH can be avoided, and the utilization rate of the PUSCH for sending scheduling information and/or service data information can be improved, improving The number of access terminals.

As for the system and device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, please refer to part of the description of the method embodiments.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Those of ordinary skill in the art can understand that all or part of the steps in the implementation of the above method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, referred to herein as Storage media, such as: ROM/RAM, disk, CD, etc.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A random access method applied to network side equipment, characterized in that the method comprises: Receiving random access information sent by the user-side device through a physical random access channel PRACH, wherein the random access information includes: a preamble, user-side device identification information, and a check code of the user-side device identification; Judging whether the preamble contained in the random access information is a valid preamble according to a preset preamble detection rule, wherein the valid preamble is one of predefined candidate preambles; According to the check code of the user-side device identifier, detect whether the user-side device identifier obtained by parsing the user-side device identifier information is correct; In the case that the preamble sequence is valid and the user-side device identity obtained by parsing is correct, send a random access response to the user-side device through a physical downlink channel, wherein the random access response includes: the network side The identification of the physical uplink shared channel PUSCH allocated by the device to the user-side device for sending scheduling information and/or service data information; receiving scheduling information and/or service data information sent by the user-side device through the PUSCH allocated by the network-side device; According to the correctness of the received scheduling information and/or service data information, feedback information is sent to the user side equipment. 2. The method of claim 1, wherein, The number of bits of the user-side device identification information contained in the random access information and the number of bits of the check code of the user-side device identification are: a predetermined amount; or The number determined by the network side device and sent to the user side device through the broadcast channel or downlink control channel. 3. The method according to claim 1 or 2, characterized in that, The position of the user-side device identification information and the check code of the user-side device identification contained in the random access information in the PRACH frequency domain is: a predetermined location; or It is determined by the network-side device and sent to the user-side device through a broadcast channel or a downlink control channel. 4. A random access method applied to a user side device, characterized in that the method comprises: Sending random access information to the network side device through the PRACH, wherein the random access information includes: a preamble sequence, user side device identification information, and a verification code of the user side device identification; Receive a random access response sent by the network side device through a physical downlink channel, where the random access response includes: the network side device allocated for the user side device for sending scheduling information and/or PUSCH identification of service data information; sending scheduling information and/or service data information to the network side device through the PUSCH allocated by the network side device; and receiving feedback information sent by the network side device for scheduling information and/or service data information. 5. The method according to claim 4, wherein the sending random access information to the network side device through the PRACH comprises: Mapping the preamble sequence contained in the random access information, the user-side device identification information and the check code of the user-side device identification to the subcarriers of the PRACH in the frequency domain; Send the above information mapped to the subcarriers to the network side device. 6. The method of claim 5, wherein, The number of bits of the user-side device identification information contained in the random access information and the number of bits of the check code of the user-side device identification are: a predetermined amount; or The number sent by the network side device through the broadcast channel or downlink control channel. 7. The method of claim 5, wherein, The subcarrier used to map the user-side device identification information contained in the random access information and the check code of the user-side device identification, the position in the PRACH frequency domain is: a predetermined location; or The location sent by the network side device through broadcast channel or downlink control channel. 8. A random access device, applied to network side equipment, characterized in that the device comprises: The random access information receiving module is configured to receive random access information sent by the user-side device through the PRACH, wherein the random access information includes: a preamble sequence, user-side device identification information, and a verification code of the user-side device identification ; A preamble judging module, configured to judge whether the preamble included in the random access information is a valid preamble according to a preset preamble detection rule, wherein the valid preamble is one of the predefined candidate preambles one; The parsing result detection module is used to detect whether the user-side device identifier obtained by parsing the user-side device identifier information is correct according to the check code of the user-side device identifier; A random access response sending module, configured to send a random access response to the user side device through a physical downlink channel when the judgment result of the preamble judgment module is yes and the detection result of the analysis result detection module is yes. An access response, wherein the random access response includes: an identifier of a PUSCH allocated by the network side device to the user side device for sending scheduling information and/or service data information; A PUSCH information receiving module, configured to receive scheduling information and/or service data information sent by the user-side device through the PUSCH allocated by the network-side device; The feedback information sending module is configured to send feedback information to the user side equipment according to the correctness of the received scheduling information and/or service data information. 9. A random access device, applied to user-side equipment, characterized in that the device comprises: A random access information sending module, configured to send random access information to the network side device through the PRACH, wherein the random access information includes: a preamble sequence, user side device identification information, and a verification code of the user side device identification; A random access response receiving module, configured to receive a random access response sent by the network side device through a physical downlink channel, wherein the random access response includes: the network side device allocated for the user side device . An identifier of the PUSCH used to send scheduling information and/or service data information; A PUSCH sending module, configured to send scheduling information and/or service data information to the network side device through the PUSCH allocated by the network side device; The feedback information receiving module is configured to receive feedback information for scheduling information and/or service data information sent by the network side device. 10. A random access system, characterized in that the system comprises: The network-side equipment applying the apparatus of claim 8 and the user-side equipment applying the apparatus of claim 9 .