CN115379585A

CN115379585A - Solution method of competition conflict, narrow-band Internet of things equipment and network equipment

Info

Publication number: CN115379585A
Application number: CN202110552124.0A
Authority: CN
Inventors: 孙子文; 孔祥振; 姚莉
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Shanghai Huawei Technologies Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-11-22
Also published as: WO2022242375A1

Abstract

A method for resolving a contention conflict comprises the following steps: after the second narrowband Internet of things equipment sends the lead code to the network equipment, the second narrowband Internet of things equipment receives the random access response sent by the network equipment, then sends the CRNTI MAC CE to the network equipment, after first downlink control information sent by the network equipment is received, the CRNTI MAC CE is sent to the network equipment according to the first downlink control information, and after the first scrambling information sent by the network equipment is received, the pre-stored CRNTI is used for descrambling the first scrambling information into second downlink control information. Because the CRNTI is unique, one narrow-band Internet of things device can be accessed to the network, and other narrow-band Internet of things devices cannot be accessed to the network, so that competition conflicts are reduced. The application also provides narrow-band Internet of things equipment and network equipment capable of achieving the method.

Description

Solution method of competition conflict, narrow-band Internet of things equipment and network equipment

Technical Field

The application relates to the field of wireless communication, in particular to a solution method for contention conflict, narrow-band internet of things equipment and network equipment.

Background

The narrowband internet of things (NB-IoT) is a technology supporting cellular data connection of low-power-consumption devices in a wide area network, and has the characteristics of wide coverage, many connections, high speed and low power consumption.

In NB-IoT, the current method of contending for a channel is roughly as follows: the randomly accessed NB-IoT device takes device A as an example, the re-synchronized NB-IoT device takes device B as an example, when the device A and the device B simultaneously send lead codes to one base station and the two lead codes are used for requesting the same time-frequency resource, the base station sends random access response to the device A and the device B according to the lead codes, then the device A and the device B send messages to the base station on the same time-frequency resource, and the messages sent by the base station can also be received on the same time-frequency resource.

However, the base station can receive messages or data transmitted by only one device, which may result in that the devices a and B cannot normally transmit and receive data.

Disclosure of Invention

In view of this, the application provides a solution to contention conflicts, a narrowband internet of things device and a network device, which can reduce contention conflicts between NB-IoT devices.

In the method, after a second narrowband internet of things device sends a preamble to a network device, a random access response sent by the network device is received, a CRNTI MAC CE is sent to the network device, after first downlink control information sent by the network device is received, the CRNTI MAC CE is sent to the network device according to the first downlink control information, and after the first scrambling information sent by the network device is received, the first scrambling information is descrambled into second downlink control information by using a pre-stored CRNTI. Both the first downlink control information and the second downlink control information may be DCIN0. The pre-stored CRNTI is the CRNTI which is already stored before the second narrowband internet-of-things device sends the preamble to the network device.

The network equipment sends the first downlink control information and the second downlink control information to one or more narrow-band Internet of things equipment, and when the CRNTI scrambled the second downlink control information is consistent with the CRNTI pre-stored by the narrow-band Internet of things equipment, the narrow-band Internet of things equipment can descramble successfully. The CRNTI of other narrowband Internet of things equipment is inconsistent with the CRNTI of the scrambled second downlink control information, so that the second downlink control information cannot be descrambled correctly. When the second narrowband internet of things device descrambles to obtain the second downlink control information, success of contention can be determined.

A second aspect provides a contention resolution method, in which a first narrowband internet of things device sends a preamble to a network device and then receives a random access response sent by the network device; then sending an RRC connection request to the network equipment; after receiving first downlink control information sent by the network equipment, sending an RRC connection establishment completion message to the network equipment according to the first downlink control information; and after receiving the first scrambling information sent by the network equipment, descrambling the first scrambling information by using the TCRNTI. The random access response and the RRC connection request include the TCRNTI. According to the implementation, the network equipment sends the first downlink control information and the second downlink control information to one or more narrow-band Internet of things equipment, and the second downlink control information is scrambled by the CRNTI of the second narrow-band Internet of things equipment, so that other narrow-band Internet of things equipment except the second narrow-band Internet of things equipment cannot be descrambled to obtain the second downlink control information, and corresponding time-frequency resources cannot be obtained to access the network, so that the competition conflict among the plurality of narrow-band Internet of things equipment is solved.

In one possible implementation manner, a first narrowband internet of things device receives a hybrid automatic repeat request sent by a network device; and sending uplink data to the network equipment according to the hybrid automatic repeat request. By this implementation, the first narrowband internet of things device can resend the uplink data according to the hybrid automatic repeat request, so that the random access process does not need to be restarted, and therefore the step of resending the uplink data can be saved, and the sending of the uplink data is accelerated.

In another possible implementation manner, the first narrowband internet of things device receives a group status report sent by the network device; and sending uplink data to the network equipment according to the group status report. By this implementation, the first narrowband internet of things device may resend the uplink data according to the group status report of the RLC layer, so that the random access procedure does not need to be reinitiated, and therefore, a step of resending the uplink data may be simplified to speed up sending the uplink data.

A third aspect provides a method for solving contention conflicts, in which a network device sends a random access response to at least one narrowband internet of things device after receiving a preamble sent by at least one narrowband internet of things device, the network device sends first downlink control information to the at least one narrowband internet of things device after receiving an RRC connection request sent by a first narrowband internet of things device, and the network device compares a TCRNTI in the RRC connection request with a CRNTI included in an MAC CE after receiving a CRNTI MAC CE sent by a second narrowband internet of things device; and scrambling the second downlink control information into first scrambling information by using the CRNTI according to the comparison result, and then sending the first scrambling information to at least one narrowband Internet of things device. Since the first scrambling information is obtained by scrambling the second downlink control information by using the CRNTI and the CRNTI is different from the TCRNTI, the narrowband internet of things device to which the TCRNTI is allocated cannot correctly descramble the first scrambling information, and thus cannot access the network. And the second narrowband Internet of things equipment can correctly descramble the first scrambled information, and a second downlink control information access network is obtained according to descrambling. Therefore, competition conflicts among the narrow-band Internet of things devices are reduced.

In a possible implementation manner, after scrambling third downlink control information including target time-frequency resource information into second scrambling information by using a CRNTI, the network device sends the second scrambling information to at least one narrowband internet of things device; if the uplink data is not detected on the time-frequency resource corresponding to the target time-frequency resource information, the network device sends a hybrid automatic repeat request to the first narrowband Internet of things device, and then receives the uplink data sent by the first narrowband Internet of things device according to the hybrid automatic repeat request. And if the uplink data is not detected on the time-frequency resource corresponding to the target time-frequency resource information, indicating that the second narrowband Internet of things equipment has sent the uplink data. The network equipment sends the hybrid automatic repeat request to the first narrow-band Internet of things equipment, so that the first narrow-band Internet of things equipment sends uplink data, the second narrow-band Internet of things equipment and the first narrow-band Internet of things equipment can send the uplink data in a time-sharing mode, the step of sending the uplink data by the first narrow-band Internet of things equipment can be simplified, and the speed of sending the uplink data by the first narrow-band Internet of things equipment is increased.

In another possible implementation manner, the network device receives uplink data sent by the first narrowband internet of things device; after scrambling fourth downlink control information including target time-frequency resource information into third scrambling information by using CRNTI, the network equipment sends the third scrambling information to at least one narrow-band Internet of things equipment; when uplink data sent by the second narrow-band Internet of things equipment is not detected on the time-frequency resources corresponding to the target time-frequency resource information and the uplink data received from the first narrow-band Internet of things equipment is discontinuous, the network equipment sends a group status report to the first narrow-band Internet of things equipment and then receives the uplink data sent by the first narrow-band Internet of things equipment according to the group status report. When the uplink data sent by the second narrowband internet of things device is not detected on the time frequency resource corresponding to the target time frequency resource information and the uplink data received from the first narrowband internet of things device is discontinuous, it is indicated that the second narrowband internet of things device has sent the uplink data and the first narrowband internet of things device only sends partial data. The network equipment sends the group status report of the RLC layer to the first narrowband Internet of things equipment, so that the first narrowband Internet of things equipment sends uplink data, and the step of sending the uplink data by the first narrowband Internet of things equipment can be simplified.

The fourth aspect provides a solution to contention conflicts, in which a narrowband internet of things device receives a random access response sent by a network device according to a preamble after sending the preamble to the network device, and then sends a message three to the network device; after receiving the downlink control information sent by the network equipment, the narrowband internet of things equipment executes operation according to the downlink control information. The downlink control information may be, but is not limited to, DCIN0. The downlink control information includes a transport block set that is greater than or less than a preset transport block set, where the preset transport block set is used to send a Control Element (CE) of a Media Access Control (MAC) layer, and the MAC CE includes a Cell Radio Network Temporary Identifier (CRNTI). Optionally, the size of the predetermined transport block set is, but not limited to, 88 bits.

The random access narrowband internet of things equipment can perform random access according to the transmission block set which is larger or smaller than the preset transmission block set. The resynchronized narrowband Internet of things equipment needs to preset a transmission block set to send the CRNTI MAC CE. The network equipment issues the downlink control information to reject the resynchronized narrowband Internet of things equipment from accessing the network, so that competition conflicts are reduced.

In a possible implementation manner, the narrowband internet of things device sends an RRC connection request to the network device, receives downlink control information sent by the network device, and sends an RRC establishment completion message to the network device. The random access narrowband internet of things device may send a Radio Resource Control (RRC) setup complete message according to a transmission block set larger or smaller than a preset transmission block set, thereby completing the random access.

In another possible implementation manner, the performing, by the narrowband internet of things device, an operation according to the downlink control information includes: and the narrowband Internet of things equipment compares the transmission block set of the downlink control information with a preset transmission block set, and determines the contention failure of the narrowband Internet of things equipment according to the comparison result. Message three is CRNTI MAC CE. After receiving the downlink control information, the resynchronized narrowband internet of things device judges that the downlink control information does not meet the requirement of re-uploading the CRNTI MAC CE according to the transmission block set, thereby determining that the competition fails.

A fifth aspect provides a contention conflict resolution method, in which a network device sends a random access response to one or more narrowband internet of things devices after receiving a preamble sent by the one or more narrowband internet of things devices; after receiving the RRC connection request sent by the target narrowband Internet of things device, the network device sends downlink control information to one or more narrowband Internet of things devices. The downlink control information includes a transport block set greater than or less than a preset transport block set, and the preset transport block set is used for transmitting a CRNTI MAC CE. Optionally, the size of the transport block set is preset to 88 bits.

In this way, after the network device sends the downlink control information, the randomly accessed narrowband internet of things device can send an RRC connection establishment completion message to the network device according to the downlink control information. And the resynchronized narrowband Internet of things equipment determines that the competition fails according to the transmission block set of the downlink control information, and does not send the MAC CE. Therefore, the competition conflict when a plurality of narrow-band Internet of things devices request the same time-frequency resource to access the network can be reduced.

A sixth aspect provides a narrowband internet of things device, which includes a receiving unit, a processing unit, and a sending unit; the sending unit is used for sending a lead code to the network equipment; the receiving unit is used for receiving a random access response sent by the network equipment; the transmitting unit is further configured to transmit the MAC CE to the network device, where the MAC CE includes a pre-stored CRNTI; the receiving unit is further configured to receive first downlink control information sent by the network device; a transmitting unit, further configured to transmit the MAC CE to the network device according to the first downlink control information; the receiving unit is further configured to receive first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling, by the network device, the second downlink control information by using the CRNTI; the processing unit is configured to descramble the first scrambling information into second downlink control information using the CRNTI. The steps and the beneficial effects executed by each unit of the narrowband internet of things device in the sixth aspect can be referred to the corresponding description in the first aspect.

A seventh aspect provides a narrowband internet of things device, which includes a receiving unit, a processing unit, and a transmitting unit; the sending unit is used for sending a lead code to the network equipment; the receiving unit is used for receiving a random access response which is sent by the network equipment and comprises TCRNTI; the sending unit is further configured to send an RRC connection request to the network device; the receiving unit is further configured to receive first downlink control information sent by the network device; the sending unit is further configured to send an RRC connection setup complete message to the network device according to the first downlink control information; the receiving unit is further configured to receive first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling second downlink control information using CRNTI of the second narrowband internet of things device; the processing unit is configured to descramble the downlink control information using the TCRNTI.

In a possible implementation manner, the receiving unit is further configured to receive a hybrid automatic repeat request sent by the network device; the sending unit is further configured to send uplink data to the network device according to the hybrid automatic repeat request.

In another possible implementation manner, the receiving unit is further configured to receive a group status report sent by the network device; the sending unit is further configured to send uplink data to the network device according to the group status report.

Steps and beneficial effects executed by each unit of the narrow-band internet-of-things device in the seventh aspect can be referred to corresponding descriptions in the second aspect.

An eighth aspect provides a network device, which includes a receiving unit, a processing unit, and a transmitting unit; the receiving unit is used for receiving a lead code sent by at least one narrowband Internet of things device; the sending unit is used for sending a random access response to at least one narrow-band Internet of things device; the receiving unit is further configured to receive an RRC connection request sent by the first narrowband internet of things device, where the RRC connection request includes the TCRNTI; the sending unit is further configured to send first downlink control information to at least one narrowband internet of things device; the receiving unit is also used for receiving the CRNTI MAC CE sent by the second narrowband Internet of things equipment; the processing unit is used for comparing the TCRNTI with the CRNTI and scrambling the second downlink control information into first scrambling information by using the CRNTI according to the comparison result; the sending unit is further configured to send the first scrambling information to at least one narrowband internet of things device.

In a possible implementation manner, the processing unit is further configured to scramble third downlink control information including the target time-frequency resource information into second scrambling information using CRNTI; the sending unit is further used for sending second scrambling information to at least one narrowband Internet of things device; when uplink data is not detected on the time frequency resource corresponding to the target time frequency resource information, sending a hybrid automatic repeat request to the first narrow-band Internet of things device; the receiving unit is further configured to receive uplink data sent by the first narrowband internet of things device according to the hybrid automatic repeat request.

In another possible implementation manner, the receiving unit is further configured to receive uplink data sent by the first narrowband internet of things device; the processing unit is further configured to scramble fourth downlink control information including the target time-frequency resource information into third scrambling information using CRNTI; the sending unit is further configured to send third scrambling information to at least one narrowband internet of things device; when uplink data sent by the second narrowband internet of things equipment is not detected on the time frequency resources corresponding to the target time frequency resource information and the uplink data received from the first narrowband internet of things equipment is discontinuous, sending a group status report to the first narrowband internet of things equipment; the receiving unit is further configured to receive uplink data sent by the first narrowband internet of things device according to the group status report.

The steps and advantageous effects performed by the units of the network device in the eighth aspect can be referred to the corresponding description in the third aspect.

The ninth aspect provides narrow-band Internet of things equipment, which comprises a receiving unit, a sending unit and an executing unit; the sending unit is used for sending a lead code to the network equipment; the receiving unit is used for receiving a random access response sent by the network equipment; the sending unit is also used for sending a third message to the network equipment; the receiving unit is further configured to receive downlink control information sent by the network device; the execution unit is used for determining a competition result according to the transmission block set. The downlink control information includes a transport block set larger or smaller than a preset transport block set, the preset transport block set is used for transmitting a MAC CE, and the MAC CE includes a CRNTI. Optionally, the size of the transport block set is preset to 88 bits.

In a possible implementation manner, the execution unit is specifically configured to send an RRC setup complete message to the network device when the message three is an RRC connection request.

In another possible implementation manner, the execution unit is specifically configured to compare the transport block set with a preset transport block set when the message three is a MAC CE; and determining that the narrow-band Internet of things equipment fails to compete according to the comparison result.

The steps and the beneficial effects performed by the units of the narrowband internet of things device in the ninth aspect can be referred to the corresponding description in the embodiment shown in fig. 1.

A tenth aspect provides a network device, including a receiving unit, a processing unit, and a transmitting unit; the receiving unit is used for receiving a lead code sent by at least one narrowband Internet of things device; the sending unit is used for sending a random access response to at least one narrowband Internet of things device; the receiving unit is also used for receiving an RRC connection request sent by the target narrowband Internet of things equipment; the sending unit is further configured to send downlink control information to at least one narrowband internet of things device, where the downlink control information includes a transport block set that is greater than or less than a preset transport block set, and the preset transport block set is used to send a CRNTI MAC CE. Optionally, the size of the transport block set is preset to 88 bits. The steps and advantageous effects performed by the units of the network device in the tenth aspect can be referred to the corresponding description of the fifth aspect.

An eleventh aspect provides a narrowband internet of things device comprising a processor and a memory, the memory for storing a program; the processor is adapted to implement the method of the first, second or fourth aspect by executing a program.

A twelfth aspect provides a network device comprising a processor and a memory, the memory for storing a program; the processor is configured to implement the method of the third or fifth aspect by executing a program.

A thirteenth aspect provides a communication system, which includes a narrowband internet of things device and a network device, where the narrowband internet of things device is the narrowband internet of things device in the first aspect, the second aspect, or the fourth aspect, and the network device is the network device in the third aspect or the fifth aspect.

A fourteenth aspect provides a computer-readable storage medium having instructions stored thereon, which, when executed on a computer, cause the computer to perform the method of the above-described aspects.

A fifteenth aspect provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

A sixteenth aspect provides a chip system comprising at least one processor coupled to a memory for storing computer programs or instructions, the processor being configured to execute the computer programs or instructions to implement the methods of the above aspects.

Drawings

FIG. 1 is a schematic diagram of a narrowband Internet of things system in an embodiment of the application;

fig. 2 is a schematic flow chart of a conventional random access;

FIG. 3 is a flowchart illustrating a conventional re-synchronization access;

FIG. 4 is a flowchart of a contention conflict resolution method according to an embodiment of the present application;

FIG. 5 is another flowchart of a contention resolution method according to an embodiment of the present application;

FIG. 6 is another flowchart of a contention resolution method according to an embodiment of the present application;

FIG. 7 is another flowchart of a contention conflict resolution method in an embodiment of the present application;

FIG. 8 is another flowchart of a contention conflict resolution method in an embodiment of the present application;

fig. 9 is a structural diagram of a narrowband internet of things device in an embodiment of the present application;

fig. 10 is another structural diagram of a narrowband internet of things device in the embodiment of the present application;

FIG. 11 is a block diagram of a network device in an embodiment of the present application;

fig. 12 is another structural diagram of a narrowband internet of things device in the embodiment of the present application;

fig. 13 is another structural diagram of a network device in the embodiment of the present application;

fig. 14 is another structural diagram of a narrowband internet of things device in the embodiment of the present application;

fig. 15 is another structural diagram of a network device in the embodiment of the present application.

Detailed Description

The solution method for the competition conflict can be applied to a narrow-band Internet of things system. The narrow-band Internet of things system comprises narrow-band Internet of things equipment and network equipment. The narrow-band Internet of things equipment can be but is not limited to an intelligent water meter, an intelligent electric meter, a smoke detector, an intelligent street lamp, an intelligent ground lock and the like. The network devices may be, but are not limited to, base stations, micro base stations, pico base stations, and the like. The base station may be a 4G base station, a 5G base station, or an evolved base station after 5G.

Referring to fig. 1, in one example, the narrowband internet of things system includes a smart water meter 111, a smart water meter 112, a smart electricity meter 113, and a base station 12. The base station 12 is connected with the intelligent water meter 111, the intelligent water meter 112 and the intelligent electric meter 113 through wireless links.

The intelligent water meter 111 is a device that does not establish an RRC connection, and when the intelligent water meter 111 is to prepare to send uplink data, the intelligent water meter 111 first performs a random access procedure.

The intelligent water meter 112 is a device that has established an RRC connection, and after it has gone dormant, the intelligent water meter 112 cannot synchronize with the clock of the base station 12, so that the intelligent water meter 112 is in an up-going out-of-step state. When the intelligent water meter 112 is ready to send the upstream data, the intelligent water meter 112 will perform resynchronization first.

When the intelligent water meters 111 and 112 request the same time-frequency resource, the base station may allocate the same Temporary Cell Radio Network Temporary Identifier (TCRNTI) to the intelligent water meters 111 and 112, so that the intelligent water meters 111 and 112 may send uplink data in the same time-frequency resource, and the uplink data sent by the two intelligent water meters may have a contention conflict, which may cause the base station 12 to receive the uplink data sent by one intelligent water meter, or may fail to receive the uplink data.

The smart meter 113 may be a device that does not establish an RRC connection or a device that has established an RRC connection. The smart meter 113 may also conflict with the smart water meter 111 or the smart water meter 112 in competition when initiating the random access request or initiating the resynchronization request. It should be understood that the above are merely illustrative examples. The number and types of devices with competing conflicts are not limited in this application.

In the following description of the random access procedure, referring to fig. 2, in an example, a method for random access of a narrowband internet of things device is roughly as follows:

step 201, sending a lead code to a network device by the narrowband internet of things device.

The preamble is also referred to as MSG1 or random access request.

Step 202, the narrowband internet of things device receives a random access response sent by the network device.

The random access response is also referred to as MSG2. The random access response carries the TCRNTI, which is an identifier allocated to the narrowband internet of things device by the network device. When the multiple narrow-band internet of things devices request the same time-frequency resource, the multiple narrow-band internet of things devices can obtain the same TCRNTI.

Step 203, the narrowband internet of things device sends an RRC connection request to the network device.

The RRC connection request is also referred to as MSG3. The RRC connection request includes the TCRNTI.

And step 204, the narrowband internet of things equipment receives an RRC connection establishment message sent by the network equipment.

The RRC connection setup message is also referred to as MSG4.

Step 205, the narrowband internet of things device receives downlink control information sent by the network device.

The downlink control information may be, but is not limited to, DCIN0.DCIN0 may include a Transport Block Set (TBS), which is the size of the uplink resource block allocated for the narrowband internet of things device.

And step 206, the narrowband internet of things equipment sends an RRC connection establishment completion message to the network equipment according to the downlink control information. The RRC connection setup complete message is also referred to as MSG5.

In the following description of the resynchronization process, referring to fig. 3, in another example, the method for resynchronization of a narrowband internet of things device includes:

step 301, sending a preamble to a network device by the narrowband internet of things device.

Step 302, the narrowband internet of things device receives a random access response sent by the network device.

Steps 301 to 302 are similar to steps 201 to 202.

Step 303, the narrowband internet of things device sends the MAC CE to the network device, where the MAC CE includes CRNTI. The CRNTI is stored in the narrowband internet of things device before step 301, and is different from the TCRNTI included in the random access response in step 302. However, the narrowband internet of things device may descramble the scrambling information sent by the network device by using the CRNTI and the TCRNTI, respectively. This MAC CE is also called CRNTI MAC CE.

And step 304, the narrowband internet of things equipment receives the RRC connection reconfiguration message sent by the network equipment.

Step 305, the narrowband internet of things device receives downlink control information sent by the network device. The downlink control information may be, but is not limited to, DCIN0.DCIN0 may include a transport block set that is the size of the uplink resource blocks allocated for the narrowband internet of things device.

Step 306, the narrowband internet of things device sends an RRC connection reconfiguration complete message to the network device.

It should be understood that the random access procedure and the resynchronization procedure described above are illustrative examples. The messages in the random access procedure and the re-synchronization procedure are not limited to the above examples. In some random access procedures and resynchronization procedures, some steps may not be performed according to actual situations.

As can be seen, MSG3 may be an RRC connection request or CRNTI MAC CE. MSG4 may be an RRC connection setup message or an RRC connection reconfiguration message. MSG5 may be an RRC connection setup complete message or an RRC connection reconfiguration message. When contention conflict occurs, the base station may receive an RRC connection request sent by one narrowband internet of things device, and then receive a CRNTI MAC CE sent by another narrowband internet of things device, so that the existing base station does not know whether the random access device should be allowed to send uplink data or the re-synchronization device should be allowed to send uplink data, which may cause re-synchronization failure or RRC access failure in radio resource control.

The method for solving the contention conflict can scramble the downlink control information by using the CRNTI of the resynchronization equipment after the contention conflict is identified so as to reject the access of other narrow-band Internet of things equipment, thereby solving the contention conflict. Referring to fig. 4, one embodiment of the contention resolution method of the present application includes:

step 401, the second narrowband internet of things device sends a preamble to the network device.

Step 402, the second narrowband internet of things device receives a random access response sent by the network device.

The random access response includes the TCRNTI.

And step 403, the second narrowband internet of things equipment sends the CRNTI MAC CE to the network equipment.

Step 404, the second narrowband internet of things device receives the first downlink control information sent by the network device.

The first downlink control information may be DCIN0. It should be noted that the network device may scramble the first downlink control information using TCRNT scrambling, and then send the scrambled first downlink control information to the second narrowband internet of things device. The second narrowband internet of things device may descramble the scrambled first downlink control information by using the TCRNT, and recover the first downlink control information.

Step 405, the second narrowband internet of things device receives first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling the second downlink control information by using CRNTI.

And 406, the second narrowband internet of things device descrambles the first scrambled information into second downlink control information by using the pre-stored CRNTI. The second downlink control information may be, but is not limited to, DCIN0.

In this embodiment, since the first scrambling information is obtained by scrambling the second downlink control information using CRNTI, only the second narrowband internet of things device can descramble correctly. The second narrowband internet of things device can acquire time-frequency resources according to the second downlink control information to transmit uplink data. And other narrowband Internet of things equipment cannot descramble correctly, so that other narrowband Internet of things equipment cannot obtain time-frequency resources according to the first scrambling information to transmit uplink data.

After step 406, the TCRNTI may be discarded by the second narrowband internet of things device, and in the subsequent step, the CRNTI is used to descramble the scrambling information sent by the network device, and the TCRNTI is not used to descramble the scrambling information sent by the network device. The network device may send the downlink control information scrambled by the CRNTI one or more times, and the second narrowband internet of things device may continue to send the uplink data according to the downlink control information.

In an optional embodiment, after step 403 and before step 404, the second narrowband internet of things device receives an RRC connection reconfiguration message sent by the network device.

The solution of the contention conflict in the present application is described below by taking a resynchronized narrowband internet of things device as an example. Referring to fig. 5, another embodiment of the contention resolution method of the present application includes:

step 501, the first narrowband internet of things device sends a preamble to the network device.

Step 502, the first narrowband internet of things device receives a random access response sent by the network device.

Step 503, the first narrowband internet of things device sends an RRC connection request to the network device.

The random access response and the RRC connection request include the TCRNTI.

Step 504, the first narrowband internet of things device receives first downlink control information sent by the network device.

The first downlink control information may be, but is not limited to, DCIN0.

And 505, the first narrowband internet of things device sends an RRC connection setup complete message to the network device according to the first downlink control information.

It should be appreciated that the network device may not receive the RRC connection setup complete message in the event of a channel collision.

Step 506, the first narrowband internet of things device receives first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling the second downlink control information by using the CRNTI of the second narrowband internet of things device.

And 507, the first narrowband internet of things equipment descrambles the first scrambling information by using the TCRNTI.

In this embodiment, since the first scrambling information is obtained by scrambling the second downlink control information using the CRNTI of the second narrowband internet of things device, the first narrowband internet of things device cannot correctly descramble the first scrambling information, and therefore cannot obtain the time-frequency resource for sending the uplink data according to the first scrambling information, which reduces contention conflicts.

In an optional embodiment, after step 503 and before step 504, the first narrowband internet of things device receives an RRC connection setup message sent by the network device.

The following describes a process for a network device to resolve contention conflicts. Referring to fig. 6, another embodiment of the contention resolution method of the present application includes:

step 601, the network device receives a preamble sent by at least one narrowband internet of things device.

The at least one narrowband internet of things device refers to one or more narrowband internet of things devices. The plurality of narrowband internet of things devices include, but are not limited to, a first narrowband internet of things device and a second narrowband internet of things device.

Step 602, the network device sends a random access response to at least one narrowband internet of things device.

Step 603, the network device receives the RRC connection request sent by the first narrowband internet of things device. The random access response and the RRC connection request include the same TCRNTI.

Besides the first narrowband internet of things device sending the RRC connection request, other narrowband internet of things devices may also send a CRNTI MAC CE. In this embodiment, the third message received by the network device is an RRC connection request sent by the first narrowband internet of things device.

Step 604, the network device sends first downlink control information to at least one narrowband internet of things device.

The first downlink network device may scramble the first downlink control information using the TCRNTI and then transmit the scrambled first downlink control information to the one or more narrowband internet of things devices. Each narrowband internet-of-things device can descramble the scrambled first downlink control information by using the TCRNTI carried by the random access response to obtain the first downlink control information.

Step 605, the network device receives the CRNTI MAC CE sent by the second narrowband internet of things device.

Step 606, the network device compares the TCRNTI with the CRNTI.

Step 607, the network device scrambles the second downlink control information into the first scrambled information by using CRNTI according to the comparison result.

After the network device sends the first downlink control information and receives the CRNTI MAC CE sent by the second narrowband internet of things device, the network device compares the received CRNTI with the TCRNTI included in the RRC connection request, and the network device determines that the comparison result is different, and may determine that a channel collision exists.

It should be noted that, after sending the first downlink control information, the network device may also receive an RRC connection setup complete message or another message sent by the first narrowband internet of things device, so that the network device compares the TCRNTI carried in the RRC connection setup complete message or another message with the TCRNTI included in the RRC connection request, and determines that the comparison result is the same, so that the network device may consider that there is no channel collision, and continue to use the TCRNTI to scramble the downlink control information.

Step 608, the network device sends the first scrambling information to at least one narrowband internet of things device.

In this embodiment, since the first scrambling information is obtained by scrambling according to the CRNTI of the second narrowband internet of things device, only the second narrowband internet of things device can correctly descramble, and other narrowband internet of things devices cannot correctly descramble, so that contention conflicts can be reduced.

For ease of understanding, the contention resolution method of the present application is described below as another embodiment. Referring to fig. 7, one embodiment of the contention conflict resolution method of the present application includes:

step 701, the first narrowband internet of things device sends a preamble to the network device.

Step 702, the second narrowband internet of things device sends a preamble to the network device.

Step 703, the network device sends a random access response to the first narrowband internet of things device and the second narrowband internet of things device.

Step 704, the first narrowband internet of things device sends an RRC connection request to the network device.

The random access response includes the TCRNTI. The RRC connection request includes the TCRNTI which is identical with the TCRNTI included in the random access response.

Step 705, the second narrowband internet of things device sends the CRNTI MAC CE to the network device.

The CRNTI MAC CE comprises a CRNTI pre-stored in the second narrowband Internet of things device. The CRNTI is the CRNTI stored by the second narrowband internet of things device before step 702, for example, after the second narrowband internet of things device succeeds in random access, the second narrowband internet of things device stores the CRNTI from the network device.

In this embodiment, after the second narrowband internet of things device sends the CRNTI MAC CE to the network device, since the RRC connection request and the CRNTI MAC CE are sent on the same time-frequency resource, there is a contention conflict, and the network device does not correctly receive the CRNTI MAC CE.

Step 706, the network device sends the first downlink control information to the first narrowband internet of things device and the second narrowband internet of things device.

The first downlink control information may be, but is not limited to, DCIN0.

And step 707, the first narrowband internet of things device sends an RRC connection setup complete message to the network device.

And 708, the second narrowband Internet of things equipment sends the CRNTI MAC CE to the network equipment.

Since the RRC connection setup complete message and the CRNTI MAC CE are transmitted on the same time-frequency resource, there is contention conflict, and the network device does not correctly receive the RRC connection setup complete message.

Step 709, the network device compares the TCRNTI included in the RRC connection request with the CRNTI.

Since the second narrowband internet of things device prestores CRNTI, the TCRNTI allocated by the network device according to the preset rule is different from the CRNTI. After the network device compares the TCRNTI with the CRNTI, it may be determined that a contention conflict exists according to a comparison result that the TCRNTI is different from the CRNTI.

Step 710, the network device scrambles the second downlink control information into the first scrambled information by using the CRNTI according to the comparison result. The second downlink control information may be, but is not limited to, DCIN0.

Step 711, the network device sends the first scrambling information to the first narrowband internet of things device and the second narrowband internet of things device.

The network equipment scrambles the second downlink control information by using the CRNTI, and then sends the first scrambled information to the first narrow-band Internet of things equipment and the second narrow-band Internet of things equipment.

And 712, the second narrowband internet of things device descrambles the first scrambling information into second downlink control information by using the CRNTI.

After step 712, the TCRNTI may be discarded by the second narrowband internet of things device, so that the second narrowband internet of things device descrambles the scrambling information sent by the network device using the CRNTI, and the scrambling information sent by the network device is not descrambled using the TCRNTI in a subsequent step. And the first narrowband Internet of things equipment descrambles the scrambling information sent by the network equipment by using the TCRNTI. Therefore, the first narrow-band Internet of things device and the second narrow-band Internet of things device can correctly receive the information sent by the network device.

And 713, the first narrowband internet of things device descrambles the downlink control information by using the TCRNTI.

Because the TCRNTI is different from the CRNTI, the first narrowband internet of things device cannot descramble to obtain the second downlink control information, so that the uplink data cannot be sent immediately.

In this embodiment, since the network device scrambles the downlink control information using the CRNTI of the second narrowband internet-of-things device, only the second narrowband internet-of-things device can correctly receive the downlink control information, and the first narrowband internet-of-things device fails to descramble, and thus cannot perform random access, thereby reducing contention conflicts. If there is a competition conflict between another resynchronizing narrowband internet of things device and a second narrowband internet of things device, because the CRNTI of the other resynchronizing narrowband internet of things device is different from the CRNTI of the second narrowband internet of things device, the other resynchronizing narrowband internet of things device cannot access the network.

It should be understood that the RRC connection request of step 704 is transmitted on the same time-frequency resource as the CRNTI MAC CE of step 705. The RRC connection setup complete message of step 707 is transmitted on the same time-frequency resource as the CRNTI MAC CE of step 708. Step 712 is a process of decoding the first scrambled information by the second narrowband internet of things device, and step 713 is a process of decoding the first scrambled information by the first narrowband internet of things device, where the two processes are independent and have no fixed sequence.

In an optional embodiment, the method for resolving the contention conflict further includes: after scrambling third downlink control information including target time-frequency resource information into second scrambling information by using the CRNTI, the network equipment sends the second scrambling information to at least one narrow-band Internet of things equipment; when the network equipment does not detect uplink data on the time-frequency resource corresponding to the target time-frequency resource information, the network equipment sends a hybrid automatic repeat request to the first narrow-band Internet of things equipment, and then receives the uplink data sent by the first narrow-band Internet of things equipment according to the hybrid automatic repeat request.

In this embodiment, after the network device sends the second scrambling information to the at least one narrowband internet of things device, because the second scrambling information is obtained by scrambling the third downlink control information using the CRNTI of the second narrowband internet of things device, only the second narrowband internet of things device can descramble the second scrambling information into the third downlink control information, and other narrowband internet of things devices cannot descramble the second scrambling information. And target time-frequency resource information in the third downlink control information is used for indicating the time-frequency resources of the uplink data sent by the second narrowband internet of things equipment. When the network device does not detect uplink data on the time-frequency resource corresponding to the target time-frequency resource information, that is, the second narrowband internet of things device does not send the uplink data, the network device may determine that the second narrowband internet of things device has already sent the uplink data. When uplink data is detected on the time frequency resource corresponding to the target time frequency resource information, it indicates that the second narrowband internet of things device has sent the uplink data, and the network device does not send a hybrid automatic repeat request (HARQ).

After the network device sends the HARQ to the first narrow-band Internet of things device, the first narrow-band Internet of things device sends uplink data to the network device according to the HARQ. Therefore, the first narrowband Internet of things equipment and the second narrowband Internet of things equipment can send uplink data at different time periods. And the first narrow-band Internet of things equipment does not need to reinitiate the random access request, so that the speed of sending uplink data by the first narrow-band Internet of things equipment can be increased.

In another optional embodiment, the method for resolving the contention conflict further includes: the network equipment receives uplink data sent by the first narrow-band Internet of things equipment; after scrambling fourth downlink control information comprising target time-frequency resource information into third scrambling information by using CRNTI, the network equipment sends the third scrambling information to at least one narrow-band Internet of things equipment; when uplink data sent by the second narrowband internet of things equipment is not detected on the time frequency resources corresponding to the target time frequency resource information and the uplink data received from the first narrowband internet of things equipment is discontinuous, the network equipment sends a group status report to the first narrowband internet of things equipment and then receives the uplink data sent by the first narrowband internet of things equipment according to the group status report.

In this embodiment, after the network device sends the third scrambling information to the at least one narrowband internet of things device, because the third scrambling information is obtained by scrambling the fourth downlink control information using CRNTI, only the second narrowband internet of things device can descramble the third scrambling information into the fourth downlink control information, and other narrowband internet of things devices cannot descramble the third scrambling information.

And target time-frequency resource information in the fourth downlink control information is used for indicating the time-frequency resources of the uplink data sent by the second narrowband internet of things equipment. When the network device does not detect uplink data on the time-frequency resource corresponding to the target time-frequency resource information, that is, the second narrowband internet of things device does not send the uplink data, the network device can determine that the second narrowband internet of things device has sent the uplink data.

When the uplink data received from the first narrowband internet of things device is discontinuous, it is indicated that the first narrowband internet of things device only sends part of the uplink data, so that the network device sends a group status report to the first narrowband internet of things device, and the first narrowband internet of things device can resend the uplink data which is not received by the network device according to the group status report. Specifically, the group status report is a group status report of a Radio Link Control (RLC) layer. Therefore, the first narrowband Internet of things device and the second narrowband Internet of things device can send uplink data at different time periods. The first narrowband internet of things equipment does not need to reinitiate the random access request, so that the speed of sending uplink data by the first narrowband internet of things equipment can be increased.

The above embodiments describe a method of scrambling downlink control information using CRNTI of a re-synchronization apparatus. A method of resolving a contention conflict using new downlink control information is described below. Referring to fig. 8, another embodiment of the contention resolution method of the present application includes:

step 801, sending a preamble to a network device by a first narrowband internet of things device.

Step 802, the second narrowband internet of things device sends a preamble to the network device.

In this embodiment, the preamble sent by the first narrowband internet of things device and the preamble sent by the second narrowband internet of things device are used to request the same time-frequency resource.

Step 803, the network device sends a random access response to the first narrowband internet of things device and the second narrowband internet of things device.

The network device sends a random access response in a wireless channel, and both the first narrowband internet of things device and the second narrowband internet of things device can monitor the random access response in the channel. The random access response includes the TCRNTI.

Step 804, the first narrowband internet of things device sends an RRC connection request to the network device.

In this embodiment, after the first narrowband internet of things device sends the RRC connection request to the network device, the network device does not correctly receive the RRC connection request due to contention conflict.

And step 805, the second narrowband internet of things equipment sends the CRNTI MAC CE to the network equipment. CRNTI MAC CE includes CRNTI.

Step 806, the network device sends downlink control information to the first narrowband internet of things device and the second narrowband internet of things device.

Because the time-frequency resource of the RRC connection request sent by the first narrowband Internet of things device is the same as the time-frequency resource of the CRNTI MAC CE sent by the second narrowband Internet of things device, competition conflict exists, and thus the network device can decode one message or both messages fail to decode.

After determining that the message three is the RRC connection request, the network device sends downlink control information to the first narrowband internet of things device and the second narrowband internet of things device, where the downlink control information may be DCIN0. The downlink control information includes a transport block set greater than or less than a preset transport block set, and the preset transport block set is used for transmitting a CRNTI MAC CE. The size of the preset transport block set may be, but is not limited to, 88 bits. Optionally, the transport block set is preset to be any integer value from 88 bits to 100 bits.

If the network device receives the CRNTI MAC CE, the transport block set in the downlink control information sent by the network device may be equal to the predetermined transport block set.

Step 807, the first narrowband internet of things device sends an RRC establishment completion message to the network device.

In this embodiment, when receiving the RRC connection request, the network device sends specific downlink control information, so that the re-synchronized narrowband internet of things device cannot access the network, thereby reducing contention conflicts.

In an optional embodiment, after step 803 and before step 804, the first narrowband internet of things device receives an RRC connection setup message sent by the network device. In another optional embodiment, after step 803 and before step 805, the second narrowband internet of things device receives an RRC connection reconfiguration message sent by the network device.

In another example, after step 803, the narrowband internet of things device receives downlink control information sent by the network device, and the downlink control information includes a transport block set equal to a preset transport block set, and the narrowband internet of things device compares the transport block set with the preset transport block set; and the narrowband Internet of things equipment determines that the comparison result is the same, and the narrowband Internet of things equipment can retransmit the CRNTI MAC CE to the network equipment.

The data transmission method of the present application is described above, and an apparatus for implementing the data transmission method is described below. Referring to fig. 9, an embodiment of a narrowband internet of things device 900 in the present application includes a receiving unit 901, a processing unit 902, and a transmitting unit 903.

A sending unit 903, configured to send a preamble to a network device;

a receiving unit 901, configured to receive a random access response sent by a network device;

a sending unit 903, configured to send a CE of the MAC to the network device, where the MAC CE includes a pre-stored CRNTI;

a receiving unit 901, configured to receive first downlink control information sent by a network device;

a transmitting unit 903, configured to transmit the MAC CE to the network device according to the first downlink control information;

a receiving unit 901, further configured to receive first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling the second downlink control information by using CRNTI;

a processing unit 902, configured to descramble the first scrambled information into second downlink control information using CRNTI.

The narrowband internet of things device 900 in the embodiment shown in fig. 9 implements the function of the second narrowband internet of things device in the embodiments shown in fig. 4 to 7. The terms used herein to explain the steps and advantages performed by the various elements may refer to the corresponding descriptions in the embodiments shown in fig. 4-7.

Referring to fig. 10, an embodiment of a narrowband internet of things device 1000 in the present application includes: a receiving unit 1001, a processing unit 1002 and a transmitting unit 1003.

A sending unit 1003, configured to send a preamble to the network device;

a receiving unit 1001, configured to receive a random access response sent by a network device;

a sending unit 1003, configured to send an RRC connection request to the network device, where the RRC connection request includes TCRNTI;

a receiving unit 1001, configured to receive first downlink control information sent by a network device;

a sending unit 1003, further configured to send an RRC connection setup complete message to the network device according to the first downlink control information;

the receiving unit 1001 is further configured to receive first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling the second downlink control information by using a CRNTI of the second narrowband internet of things device;

a processing unit 1002, configured to descramble the downlink control information using the TCRNTI.

In an optional embodiment, the receiving unit 1001 is further configured to receive a hybrid automatic repeat request sent by a network device;

the sending unit 1003 is further configured to send uplink data to the network device according to the hybrid automatic repeat request.

In a further alternative embodiment of the method,

a receiving unit 1001, configured to receive a group status report sent by a network device;

the sending unit 1003 is further configured to send uplink data to the network device according to the group status report.

The narrowband internet of things device 1000 in the embodiment shown in fig. 10 may implement the function of the first narrowband internet of things device in the embodiments shown in fig. 4 to 7. The terms used herein to explain the steps and advantages performed by the various elements may refer to the corresponding descriptions in the embodiments shown in fig. 4-7.

Referring to fig. 11, one embodiment of a network device 1100 in the present application includes:

a receiving unit 1101, configured to receive a preamble sent by at least one narrowband internet of things device;

a sending unit 1103, configured to send a random access response to at least one narrowband internet of things device;

the receiving unit 1101 is further configured to receive an RRC connection request sent by the first narrowband internet of things device, where the RRC connection request includes a TCRNTI;

a sending unit 1103, configured to send first downlink control information to at least one narrowband internet of things device;

the receiving unit 1101 is further configured to receive a MAC CE sent by the second narrowband internet of things device, where the MAC CE includes a CRNTI;

a processing unit 1102, configured to compare the TCRNTI with the CRNTI, and scramble the second downlink control information into the first scrambling information using the CRNTI according to the comparison result.

The sending unit 1103 is further configured to send the first scrambling information to at least one narrowband internet of things device.

In an alternative embodiment of the method according to the invention,

a processing unit 1102, further configured to scramble third downlink control information including target time-frequency resource information into second scrambled information using CRNTI;

a sending unit 1103, configured to send second scrambling information to at least one narrowband internet of things device;

the sending unit 1103 is further configured to send a hybrid automatic repeat request to the first narrowband internet of things device when uplink data is not detected on the time-frequency resource corresponding to the target time-frequency resource information;

the receiving unit 1101 is further configured to receive uplink data sent by the first narrowband internet of things device according to the hybrid automatic repeat request.

In a further alternative embodiment of the method,

the receiving unit 1101 is further configured to receive uplink data sent by the first narrowband internet of things device;

a processing unit 1102, further configured to scramble fourth downlink control information including the target time-frequency resource information into third scrambled information using CRNTI;

a sending unit 1103, configured to send third scrambling information to at least one narrowband internet of things device;

the sending unit 1103 is further configured to send a group status report to the first narrowband internet of things device when uplink data sent by the second narrowband internet of things device is not detected on the time-frequency resource corresponding to the target time-frequency resource information and the uplink data received from the first narrowband internet of things device is discontinuous;

the receiving unit 1101 is further configured to receive uplink data sent by the first narrowband internet of things device according to the group status report.

The network device in the embodiment shown in fig. 11 may implement the steps performed by the network device in the embodiments shown in fig. 4 to 7. The terms used herein to explain the steps and advantages performed by the various elements may be referred to in the description of the embodiments shown in fig. 4-7.

Referring to fig. 12, an embodiment of a narrowband internet of things device 1200 in the present application includes:

a sending unit 1201, configured to send a preamble to a network device;

a receiving unit 1202, configured to receive a random access response sent by a network device;

a sending unit 1201, further configured to send a third message to the network device;

a receiving unit 1202, further configured to receive downlink control information sent by a network device, where the downlink control information includes a transport block set that is greater than or less than a preset transport block set, and the preset transport block set is used to send a MAC CE, and the MAC CE includes a CRNTI;

an executing unit 1203 is configured to execute an operation according to the downlink control information.

In an optional embodiment, the executing unit 1203 is specifically configured to send an RRC setup complete message to the network device when the message three is an RRC connection request. Alternatively, the function of the execution unit 1203 may be implemented by the sending unit 1202.

In another alternative embodiment, the executing unit 1203 is specifically configured to compare the transport block set with a preset transport block set when the message three is a MAC CE; and determining that the narrow-band Internet of things equipment fails to compete according to the comparison result.

In another alternative embodiment, the size of the preset transport block set is 88 bits.

The narrowband internet of things device in the embodiment shown in fig. 12 can implement the method for resolving the contention conflict in the embodiment shown in fig. 8. The terms are used to explain the steps and advantages performed by the various elements described in conjunction with the description of the embodiment illustrated in fig. 8.

Referring to fig. 13, one embodiment of a network device 1300 in the present application includes:

a receiving unit 1301, configured to receive a preamble sent by at least one narrowband internet of things device;

a sending unit 1302, configured to send a random access response to at least one narrowband internet of things device;

the receiving unit 1301 is further configured to receive an RRC connection request sent by the target narrowband internet of things device;

a sending unit 1302, configured to send downlink control information to at least one narrowband internet of things device, where the downlink control information includes a transport block set that is greater than or smaller than a preset transport block set, and the preset transport block set is used to send a CRNTI MAC CE;

the receiving unit 1301 is further configured to receive an RRC connection establishment completion message sent by the target narrowband internet of things device.

In an alternative embodiment, the size of the set of transport blocks is preset to 88 bits.

The steps of the network device in the embodiment shown in fig. 8 may be performed by the network device in the embodiment shown in fig. 13. The terms are used to explain the steps and advantages performed by the various elements described above with respect to the embodiment of fig. 8.

The narrowband internet of things device and the network device of the present application are described below from a hardware device perspective. Referring to fig. 14, another embodiment of a narrowband internet of things device 1400 comprises: a processor 1401, a memory 1402, radio frequency circuitry 1403, an antenna 1404, and an input-output device 1405. The processor 1401, the memory 1402, the radio frequency circuit 1403, the antenna 1404, and the input-output device 1405 can be connected by a bus.

In this embodiment, the processor 1401 is mainly configured to process a communication protocol and communication data, control a narrowband internet of things device, execute a software program, process data of the software program, and the like. The memory 1402 is primarily used to store software programs and data.

By calling the program or instructions stored in the memory 1402, the processor 1401 can execute the data transmission method in the embodiment shown in fig. 4 or fig. 5, and can also execute the method executed by the narrowband internet of things device in the embodiment shown in fig. 7 or fig. 8. The narrowband internet of things device may be a first narrowband internet of things device or a second narrowband internet of things device.

The radio frequency circuit 1403 is mainly used for conversion of a baseband signal and a radio frequency signal and processing of the radio frequency signal. The antenna 1404 is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. The input/output device 1405 (e.g., touch screen, display screen, keyboard, etc.) is mainly used for receiving data input by a user and outputting data to the user. It should be noted that some kinds of narrowband internet of things devices may not have the input/output device 1405. The antenna 1404 and the radio frequency circuit 1403 having transceiving functions are considered as transceivers of a narrowband internet of things device.

It should be appreciated that the processor 1401 referred to in this embodiment may be a Central Processing Unit (CPU), other 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, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory 1402 referred to in the subject embodiments can be either volatile memory or nonvolatile memory, or can 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 (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).

Referring to fig. 15, another embodiment of a network device 1500 includes: a processor 1501, memory 1502, radio frequency circuitry 1503, and antenna 1504.

It will be appreciated that the processor 1501 may perform the data transfer method in the embodiment shown in fig. 6, and may also perform the method performed by the network device in the embodiments shown in fig. 7 or 8, by calling programs or instructions stored in the memory 1502.

The processor 1501 in the embodiments of the present application may be a CPU, or may be another general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory 1502, in embodiments of the subject application, can be either volatile memory or nonvolatile memory, or can 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. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache.

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) is integrated in the processor. It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be noted that, because the contents of information interaction, execution process, and the like between the modules/units of the apparatus are based on the same concept as the method embodiment of the present application, the technical effect brought by the contents is the same as the method embodiment of the present application, and specific contents may refer to the description in the foregoing method embodiment of the present application, and are not described herein again.

A communication system in the present application includes the second narrowband internet of things device in the embodiment shown in fig. 4, the first narrowband internet of things device in the embodiment shown in fig. 5, and the network device in the embodiment shown in fig. 6.

Another communication system in the present application includes the first narrowband internet of things device, the second narrowband internet of things device, and the network device in the embodiment shown in fig. 8.

The present application provides a computer-readable storage medium in which a computer program is stored, which, when run on a computer, causes the computer to perform the method of resolving a contention conflict in the above-described embodiment or the alternative embodiment.

The present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of resolving contention conflicts as in the illustrated or alternative embodiments described above.

The present application also provides a chip system including a processor and a memory coupled to each other. The memory is used for storing computer programs or instructions, and the processing unit is used for executing the computer programs or instructions stored by the memory so as to enable the narrowband internet of things equipment to perform the method for resolving the contention conflict in the embodiment. Alternatively, the memory may be an on-chip memory, such as a register, a cache, and the like, and the memory may also be an off-chip memory located in a site, such as a read-only memory (ROM) or other types of static storage devices that may store static information and instructions, a Random Access Memory (RAM), and the like. The processor mentioned in any above may be a general purpose central processing unit, a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits for implementing the contention resolution method.

It should be noted that the above-described embodiments of the apparatus are merely illustrative, and units illustrated as separate components may or may not be physically separate, and components illustrated as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiments of the apparatus provided in the present application, the connection relationship between the modules indicates that there is a communication connection therebetween, which may be specifically implemented as one or more communication buses or signal lines.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including an application specific integrated circuit, a special CPU, a special memory, special components, and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions may be various, such as analog circuits, digital circuits, or dedicated circuits. However, for the present application, the implementation of a software program is more preferable. Based on such understanding, the technical solutions of the present application or portions contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the method of the embodiments of the present application.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. Computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, e.g., computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.).

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A method for resolving contention conflicts, comprising:

the second narrowband Internet of things equipment sends a lead code to the network equipment;

the second narrowband Internet of things equipment receives a random access response sent by the network equipment, wherein the random access response comprises a Temporary Cell Radio Network Temporary Identifier (TCRNTI);

the second narrowband Internet of things equipment sends a control unit MAC CE of a media access control layer to the network equipment, wherein the MAC CE comprises a pre-stored cell radio network temporary identifier CRNTI;

the second narrowband Internet of things equipment receives first downlink control information sent by the network equipment;

the second narrowband Internet of things equipment sends the MAC CE to the network equipment according to the first downlink control information;

the second narrowband Internet of things equipment receives first scrambling information sent by the network equipment, wherein the first scrambling information is obtained by scrambling second downlink control information by using the CRNTI;

and the second narrowband Internet of things equipment descrambles the first scrambling information into second downlink control information by using the pre-stored CRNTI.

2. A method for resolving contention conflicts, comprising:

the first narrowband Internet of things equipment sends a lead code to the network equipment;

the first narrowband Internet of things equipment receives a random access response sent by the network equipment, wherein the random access response comprises a Temporary Cell Radio Network Temporary Identifier (TCRNTI);

the first narrowband Internet of things equipment sends a Radio Resource Control (RRC) connection request to the network equipment;

the first narrowband Internet of things equipment receives first downlink control information sent by the network equipment;

the first narrowband Internet of things equipment sends a Radio Resource Control (RRC) connection establishment completion message to the network equipment according to the first downlink control information;

the first narrowband Internet of things equipment receives first scrambling information sent by the network equipment, wherein the first scrambling information is obtained by scrambling second downlink control information by using a CRNTI (random number indication) of second narrowband Internet of things equipment;

and the first narrowband Internet of things equipment descrambles the first scrambling information by using the TCRNTI.

3. The method of claim 2, further comprising:

the first narrowband Internet of things equipment receives a hybrid automatic repeat request sent by the network equipment;

and the first narrowband Internet of things equipment sends uplink data to the network equipment according to the hybrid automatic repeat request.

4. The method of claim 2, further comprising:

the first narrowband Internet of things equipment receives a group status report sent by the network equipment;

and the first narrowband Internet of things equipment sends uplink data to the network equipment according to the group status report.

5. A method for resolving contention conflicts, comprising:

the network equipment receives a lead code sent by at least one narrowband Internet of things equipment;

the network equipment sends a random access response to the at least one narrowband Internet of things equipment;

the network equipment receives a Radio Resource Control (RRC) connection request sent by first narrow-band Internet of things equipment, wherein the RRC connection request comprises a Temporary Cell Radio Network Temporary Identifier (TCRNTI);

the network equipment sends first downlink control information to the at least one narrowband Internet of things equipment;

the network equipment receives a control unit MAC CE of a media access control layer sent by second narrowband Internet of things equipment, wherein the MAC CE comprises a cell wireless network temporary identifier CRNTI;

the network equipment compares the TCRNTI with the CRNTI;

the network equipment scrambles the second downlink control information into first scrambled information by using the CRNTI according to the comparison result;

the network equipment sends first scrambling information to the at least one narrowband Internet of things equipment.

6. The method of claim 5, further comprising:

the network equipment scrambles third downlink control information comprising target time-frequency resource information into second scrambled information by using the CRNTI;

the network equipment sends the second scrambling information to at least one narrowband Internet of things equipment;

when the network equipment does not detect uplink data on the time-frequency resource corresponding to the target time-frequency resource information, sending a hybrid automatic repeat request to the first narrow-band Internet of things equipment;

and the network equipment receives uplink data sent by the first narrowband Internet of things equipment according to the hybrid automatic repeat request.

7. The method of claim 5, further comprising:

the network equipment receives uplink data sent by the first narrowband Internet of things equipment;

the network equipment scrambles fourth downlink control information comprising target time-frequency resource information into third scrambled information by using the CRNTI;

the network equipment sends the third scrambling information to at least one narrowband Internet of things equipment;

when the network device does not detect uplink data sent by the second narrowband internet of things device on the time-frequency resource corresponding to the target time-frequency resource information and the uplink data received from the first narrowband internet of things device is discontinuous, sending a group status report to the first narrowband internet of things device;

and the network equipment receives uplink data sent by the first narrowband Internet of things equipment according to the group status report.

8. A method for resolving contention conflicts, comprising:

the narrowband Internet of things equipment sends a lead code to the network equipment;

the narrowband Internet of things equipment receives a random access response sent by the network equipment;

the narrowband Internet of things equipment sends a message III to the network equipment;

the narrowband Internet of things equipment receives downlink control information sent by the network equipment, wherein the downlink control information comprises a transmission block set which is larger than or smaller than a preset transmission block set, the preset transmission block set is used for sending a control unit MAC CE of a media access control layer, and the MAC CE comprises a cell radio network temporary identifier CRNTI;

and the narrowband Internet of things equipment executes operation according to the downlink control information.

9. The method of claim 8,

the third message is a Radio Resource Control (RRC) connection request;

the narrowband Internet of things equipment performs operation according to the downlink control information and comprises the following steps: and the narrowband Internet of things equipment sends an RRC establishment completion message to the network equipment.

10. The method of claim 8, wherein the message three is the MAC CE;

the narrowband Internet of things equipment performs operation according to the downlink control information and comprises the following steps:

the narrowband Internet of things device compares the transport block set of the downlink control information with the preset transport block set;

and the narrow-band Internet of things equipment determines that the narrow-band Internet of things equipment fails in competition according to the comparison result.

11. The method according to any of claims 8 to 10, wherein the size of the predetermined transport block set is 88 bits.

12. A method for resolving contention conflicts, comprising:

the network equipment receives a Radio Resource Control (RRC) connection request sent by target narrowband Internet of things equipment;

the network equipment sends downlink control information to the at least one narrow-band Internet of things equipment, wherein the downlink control information comprises a transmission block set which is larger than or smaller than a preset transmission block set, the preset transmission block set is used for sending a control unit MAC CE of a media access control layer, and the MAC CE comprises a cell radio network temporary identifier CRNTI;

and the network equipment receives an RRC connection establishment completion message sent by the target narrowband Internet of things equipment.

13. The method of claim 12, wherein the size of the predetermined transport block set is 88 bits.

14. The utility model provides a narrowband thing networking device, its characterized in that, narrowband thing networking device is second narrowband thing networking device, narrowband thing networking device includes:

a sending unit, configured to send a preamble to a network device;

a receiving unit, configured to receive a random access response sent by the network device;

the sending unit is further configured to send a control unit CE of a media access control layer MAC to the network device, where the MAC CE includes a pre-stored cell radio network temporary identifier CRNTI;

the receiving unit is further configured to receive first downlink control information sent by the network device;

the sending unit is further configured to send the MAC CE to the network device according to the first downlink control information;

the receiving unit is further configured to receive first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling second downlink control information using the CRNTI;

a processing unit, configured to descramble the first scrambling information into the second downlink control information using the CRNTI.

15. The utility model provides a narrowband thing networking equipment, its characterized in that, narrowband thing networking equipment is first narrowband thing networking equipment, narrowband thing networking equipment includes:

a transmitting unit, configured to transmit a preamble to a network device;

the sending unit is further configured to send a radio resource control RRC connection request to the network device, where the RRC connection request includes a temporary cell radio network temporary identifier TCRNTI;

the sending unit is further configured to send a radio resource control, RRC, connection setup complete message to the network device according to the first downlink control information;

the receiving unit is further configured to receive first scrambling information sent by the network device, where the first scrambling information is obtained by scrambling second downlink control information using a CRNTI of a second narrowband internet of things device;

a processing unit, configured to descramble the downlink control information using the TCRNTI.

16. The narrowband Internet of things device of claim 15,

the receiving unit is further configured to receive a hybrid automatic repeat request sent by the network device;

the sending unit is further configured to send uplink data to the network device according to the harq.

17. The narrowband Internet of things device of claim 15,

the receiving unit is further configured to receive a group status report sent by the network device;

the sending unit is further configured to send uplink data to the network device according to the group status report.

18. A network device, comprising:

the receiving unit is used for receiving a lead code sent by at least one narrowband Internet of things device;

a sending unit, configured to send a random access response to the at least one narrowband internet of things device;

the receiving unit is further configured to receive a radio resource control RRC connection request sent by a first narrowband internet of things device, where the RRC connection request includes a temporary cell radio network temporary identifier TCRNTI;

the sending unit is further configured to send first downlink control information to the at least one narrowband internet of things device;

the receiving unit is further configured to receive a control unit MAC CE of a media access control layer sent by a second narrowband internet of things device, where the MAC CE includes a cell radio network temporary identifier CRNTI;

a processing unit, configured to compare the TCRNTI with the CRNTI;

the processing unit is further configured to scramble second downlink control information into first scrambled information using the CRNTI according to the comparison result;

the sending unit is further configured to send first scrambling information to the at least one narrowband internet of things device.

19. The network device of claim 18,

the processing unit is further configured to scramble third downlink control information including target time-frequency resource information into second scrambling information using the CRNTI;

the sending unit is further configured to send second scrambling information to at least one narrowband internet of things device;

the sending unit is further configured to send a hybrid automatic repeat request to the first narrowband internet of things device when uplink data is not detected on a time-frequency resource corresponding to the target time-frequency resource information;

the receiving unit is further configured to receive uplink data sent by the first narrowband internet of things device according to the hybrid automatic repeat request.

20. The network device of claim 19,

the receiving unit is further configured to receive uplink data sent by the first narrowband internet of things device;

the processing unit is further configured to scramble fourth downlink control information including target time-frequency resource information into third scrambling information using the CRNTI;

the sending unit is further configured to send third scrambling information to at least one narrowband internet of things device;

the sending unit is further configured to send a group status report to the first narrowband internet-of-things device when uplink data sent by the second narrowband internet-of-things device is not detected on a time-frequency resource corresponding to the target time-frequency resource information and uplink data received from the first narrowband internet-of-things device is discontinuous;

the receiving unit is further configured to receive uplink data sent by the first narrowband internet of things device according to the group status report.

21. A narrowband Internet of things device is characterized by comprising:

a transmitting unit, configured to transmit a preamble to the network device;

the sending unit is further configured to send a third message to the network device;

the receiving unit is further configured to receive downlink control information sent by the network device, where the downlink control information includes a transport block set that is greater than or smaller than a preset transport block set, the preset transport block set is used to send a control unit MAC CE of a media access control layer, and the MAC CE includes a cell radio network temporary identifier CRNTI;

an execution unit configured to perform an operation according to the downlink control information.

22. The narrowband Internet of things device of claim 21,

the execution unit is specifically configured to send an RRC establishment complete message to the network device when the message three is a radio resource control RRC connection request.

23. The narrowband Internet of things device of claim 21,

the execution unit is specifically configured to compare the transport block set with a preset transport block set when the message three is the MAC CE; and determining that the narrowband Internet of things equipment fails to compete according to the comparison result.

24. The narrowband internet of things (lot) device of any of claims 21-23, wherein the size of the preset transport block set is 88 bits.

25. A network device, comprising:

the receiving unit is further configured to receive a radio resource control RRC connection request sent by the target narrowband internet of things device;

the sending unit is further configured to send downlink control information to the at least one narrowband internet of things device, where the downlink control information includes a transport block set that is greater than or less than a preset transport block set, and the preset transport block set is used to send a control unit MAC CE of a media access control layer that includes a cell radio network temporary identifier CRNTI;

the receiving unit is further configured to receive an RRC connection establishment completion message sent by the target narrowband internet of things device.

26. The network device of claim 25, wherein the size of the predetermined transport block set is 88 bits.

27. A computer-readable storage medium, in which a computer program is stored which, when run on a computer, causes the computer to execute the method of resolving a contention conflict according to any one of claims 1 to 13.