CN108886769B - Communication resource coordination method and device - Google Patents
Communication resource coordination method and device Download PDFInfo
- Publication number
- CN108886769B CN108886769B CN201680084043.XA CN201680084043A CN108886769B CN 108886769 B CN108886769 B CN 108886769B CN 201680084043 A CN201680084043 A CN 201680084043A CN 108886769 B CN108886769 B CN 108886769B
- Authority
- CN
- China
- Prior art keywords
- message
- communication resource
- communication
- data packet
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Abstract
The embodiment of the invention provides a communication resource coordination method and a device, wherein when the method is used for controlling equipment, the method comprises the following steps: acquiring Reference Signal Received Power (RSRP) of communication resources used by a received data packet; judging whether the RSRP meets a preset condition or not; and if the RSRP meets the preset condition, broadcasting an external broadcast message, wherein the message is used for indicating that the communication resources have conflict so that the terminal using the communication resources selects other communication resources to retransmit the data packet. Aiming at the problem that the terminal does not know whether the selected communication resource conflicts with other terminals, the control equipment such as the roadside unit and the like is used for detecting the resource conflict situation of each terminal and timely informing each terminal, so that the terminal can know whether the used resource conflicts and reselects the resource when the conflict occurs, and timely retransmits the data packet, thereby reducing the probability of conflict again and effectively avoiding the generation of continuous conflict.
Description
Technical Field
The present invention relates to communications technologies, and in particular, to a method and an apparatus for coordinating communication resources.
Background
With the development of the times, various factors such as personal safety, traffic efficiency, environmental protection and economic effect promote the establishment of a set of complete Intelligent Transportation System (ITS) to become a focus of global attention gradually. In ITS, a V2V (Vehicle to Vehicle) technology for communication between vehicles is one of key technologies, and through V2V, vehicles can acquire road condition information or receive information services in time, for example, safety information such as their speed, driving direction, specific position, whether emergency brake is stepped on, etc. can be broadcast mutually between vehicles, so that drivers can better perceive traffic conditions outside the sight distance, and advance a forecast of dangerous conditions to make avoidance. The vehicle sends V2V information to surrounding vehicles in a broadcasting mode, the sending period is 1-10 Hz, and the size is changed between 100-800 bytes.
LTE (Long Term Evolution) is the mainstream wireless communication technology at present, wherein D2D (Device to Device) technology is used as an important feature in 3GPP LTE Release 12 and is standardized to support direct communication between user terminals. Considering that the V2V communication scenario also belongs to terminal direct communication, V2V traffic can be transmitted based on D2D technology. The D2D technology has a distributed transmission mode, in which a communication resource is divided into one or more resource pools, and a user randomly selects a resource in the resource pool to transmit data when transmitting data.
However, since the D2D distributed transmission mode adopts a random transmission mechanism, there are cases where multiple neighboring users randomly select the same resource and transmit data, which will cause transmission collisions, resulting in collisions. And as user density increases, such collisions will become more apparent. In the internet of vehicles, since the vehicles need to frequently send V2V information during driving, the traffic density is high, if the D2D distributed transmission mode is used to send V2V information, the problem of serious transmission resource conflict occurs, and more importantly, the information sender does not know whether other users have resource conflict with itself, so that no measure is taken even if the information sending is unsuccessful, which causes the resource conflict to persist, affects the reliability of information transmission, and reduces the safety of the whole system.
Disclosure of Invention
In order to overcome the problems in the prior art, the present invention provides a method and an apparatus for coordinating communication resources, so as to solve the technical problem that persistent conflicts may occur when each terminal selects communication resources.
In one aspect, an embodiment of the present invention provides a communication resource coordination method, where the method is used for controlling a device, and the method includes:
acquiring Reference Signal Received Power (RSRP) of communication resources used by a received data packet;
judging whether the RSRP meets a preset condition or not;
and if the RSRP meets the preset condition, broadcasting an external broadcast message, wherein the message is used for indicating that the communication resources have conflict so that the terminal using the communication resources selects other communication resources to retransmit the data packet.
Aiming at the problem that the terminal does not know whether the selected communication resource conflicts with other terminals, the control equipment such as the roadside unit and the like is used for detecting the resource conflict situation of each terminal and timely informing each terminal, so that the terminal can know whether the used resource conflicts and reselects the resource when the conflict occurs, and timely retransmits the data packet, thereby reducing the probability of conflict again, effectively avoiding the occurrence of continuous conflict, further enhancing the reliability of data packet transmission and improving the system safety.
In one possible design, the preset conditions include:
the duration that the RSRP is greater than the preset threshold exceeds a first preset duration, and data carried by a data packet using the communication resource cannot be demodulated.
In one possible design, the message is a dedicated indication message, or the message is generated by adding bits to an existing message.
In one possible design:
when the message is a special indication message, the special indication message is sent by the control device once every P/2 duration, the special indication message is used for indicating communication resources which conflict in the past P/2 duration, each communication resource is indicated by a first preset number of bits, and P is the maximum time delay when the data packet is sent.
In one possible design:
when the message is generated by adding bits to an existing message, the message is a media access control MAC message in which a second number of bits are added to a header of the message, and the second number of bits are used to indicate a communication resource that has collided within a second preset time period recently.
In one possible design, the terminal is a vehicle, the control device is a base station or a roadside unit RSU, and the data packet is safety information for ensuring driving safety.
In another aspect, an embodiment of the present invention provides a communication resource coordination method, where the method is used for a terminal, and the method includes:
receiving a message indicating a conflicting communication resource;
judging whether the communication resources used by the terminal conflict or not according to the message;
and if the communication resources used by the terminal conflict, reselecting the communication resources for retransmitting the data packet.
Aiming at the problem that the terminal does not know whether the selected communication resource conflicts with other terminals, the control equipment such as the roadside unit and the like is used for detecting the resource conflict situation of each terminal and timely informing each terminal, so that the terminal can know whether the used resource conflicts and reselects the resource when the conflict occurs, and timely retransmits the data packet, thereby reducing the probability of conflict again, effectively avoiding the occurrence of continuous conflict, further enhancing the reliability of data packet transmission and improving the system safety.
In one possible design, the reselecting communication resources includes:
and selecting a specified communication resource for retransmitting the data packet in the remaining time of the current transmission period, wherein the specified communication resource is the communication resource which is closest to the communication resource which conflicts in the idle communication resources.
In one possible design, the method further includes:
if no idle communication resources are available, the communication resource with the minimum detected RSRP is taken as the designated communication resource.
This means that a resource reserved by a vehicle farthest from the vehicle is selected for multiplexing, so as to avoid interference of a closer vehicle as much as possible.
In one possible design, the method further includes:
and when at least two messages are received and the indications of the at least two messages on the conflicted communication resources are contradictory, processing the contradiction by using a preset strategy.
In one possible design, the terminal is a vehicle, the control device is a base station or a roadside unit RSU, and the data packet is a safety message for ensuring driving safety.
In another aspect, an embodiment of the present invention provides a communication resource coordination apparatus, configured to control a device, where the apparatus includes:
a power obtaining unit, configured to obtain reference signal received power RSRP of a communication resource used by a received data packet;
the power judging unit is used for judging whether the RSRP acquired by the power acquiring unit meets a preset condition or not;
and the message sending unit is used for broadcasting a message to the outside when the power judging unit judges that the RSRP meets the preset condition, wherein the message is used for indicating that the communication resources conflict, so that a terminal using the communication resources selects other communication resources to retransmit the data packet.
In one possible design, the preset conditions include:
the duration that the RSRP is greater than the preset threshold exceeds a first preset duration, and data carried by a data packet using the communication resource cannot be demodulated.
In one possible design, the message is a dedicated indication message, or the message is generated by adding bits to an existing message.
In one possible design:
when the message is a special indication message, the special indication message is sent by the control device once every P/2 duration, the special indication message is used for indicating communication resources which conflict in the past P/2 duration, each communication resource is indicated by a first preset number of bits, and P is the maximum time delay when the data packet is sent.
In one possible design:
when the message is generated by adding bits to an existing message, the message is a media access control MAC message in which a second number of bits are added to a header of the message, and the second number of bits are used to indicate a communication resource that has collided within a second preset time period recently.
In one possible design, the terminal is a vehicle, the control device is a base station or a roadside unit RSU, and the data packet is safety information for ensuring driving safety.
In another aspect, an embodiment of the present invention provides a communication resource coordination apparatus, where the apparatus is used for a terminal, and the apparatus includes:
a message receiving unit, configured to receive a message, where the message is used to indicate a communication resource where a collision occurs;
a conflict judging unit, configured to judge whether a communication resource used by the terminal conflicts according to the message received by the message receiving unit;
and the resource reselection unit is used for reselecting the communication resource to retransmit the data packet when the conflict judgment unit determines that the communication resource used by the terminal conflicts.
In one possible design, the reselecting communication resources includes:
and selecting a specified communication resource for retransmitting the data packet in the remaining time of the current transmission period, wherein the specified communication resource is the communication resource which is closest to the communication resource which conflicts in the idle communication resources.
In one possible design, the resource reselection unit is further configured to:
if no idle communication resources are available, the communication resource with the minimum detected RSRP is taken as the designated communication resource.
In one possible design, the apparatus further includes:
and the conflict processing unit is used for processing the conflict by using a preset strategy when the message receiving unit receives at least two messages and the indication of the at least two messages to the conflicted communication resource is contradictory.
In one possible design, the terminal is a vehicle, the control device is a base station or a roadside unit RSU, and the data packet is a safety message for ensuring driving safety.
In still another aspect, an embodiment of the present invention provides a control apparatus, including:
a receiver for receiving a data packet;
at least one processor, configured to obtain reference signal received power, RSRP, of a communication resource used by a received data packet, determine whether the RSRP meets a preset condition, and if the RSRP meets the preset condition, use a transmitter to broadcast a message to the outside, where the message is used to indicate that the communication resource has collided, so that a terminal using the communication resource selects another communication resource for data packet retransmission;
a transmitter for broadcasting the message to the outside.
In another aspect, an embodiment of the present invention provides a terminal, including:
a receiver for receiving a message indicating a conflicting communication resource;
at least one processor, configured to determine whether a communication resource used by the terminal conflicts according to the message, and reselect the communication resource to retransmit the data packet if the communication resource used by the terminal conflicts;
a transmitter for retransmitting the data packet using the reselected communication resource.
In still another aspect, an embodiment of the present invention provides a communication system, where the system includes the terminal and the control device.
In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the terminal, which includes a program designed to execute the above aspects.
In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the terminal, which includes a program designed to execute the above aspects.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
in the embodiment of the invention, aiming at the problem that the terminal does not know whether the communication resource selected by the terminal conflicts with other terminals, the control equipment such as the roadside unit and the like is used for detecting the resource conflict situation of each terminal and informing each terminal in time, so that the terminal can know whether the used resource conflicts and reselects the resource when the conflict occurs, and retransmit the data packet in time, thereby reducing the probability of conflict again, effectively avoiding the occurrence of continuous conflict, further enhancing the reliability of data packet transmission and improving the system safety.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of one possible application scenario of the present invention;
FIG. 2 is a schematic diagram of one possible application scenario of the present invention;
FIG. 3 is a flow chart illustrating a method of communication resource coordination in accordance with an exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram of one possible application scenario of the present invention;
FIG. 5 is a schematic diagram of one possible application scenario of the present invention;
FIG. 6 is a diagram illustrating a message structure according to an exemplary embodiment of the present invention;
FIG. 7 is a diagram illustrating a message structure according to an exemplary embodiment of the present invention;
FIG. 8 is a diagram illustrating a message structure according to an exemplary embodiment of the present invention;
FIG. 9 is a diagram illustrating a message structure according to an exemplary embodiment of the present invention;
FIG. 10 is a flow chart illustrating a method of communication resource coordination in accordance with an exemplary embodiment of the present invention;
fig. 11 is a signaling diagram illustrating a method of communication resource coordination according to an exemplary embodiment of the present invention;
fig. 12 is a schematic diagram illustrating a communication resource coordination device according to an exemplary embodiment of the present invention;
fig. 13 is a schematic diagram illustrating a communication resource coordination device according to an exemplary embodiment of the present invention;
fig. 14 is a schematic diagram illustrating a UE structure according to an exemplary embodiment of the present invention;
fig. 15 is a schematic diagram illustrating a base station structure according to an exemplary embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The UE (or Terminal) according to the present invention may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, and various forms of User Equipment (UE), Mobile Stations (MS), terminals (Terminal), and Terminal devices (Terminal Equipment), etc. with wireless communication functions. For convenience of description, in the present invention, the above-mentioned devices may be collectively referred to as user equipment or UE or terminal. The following description of the present invention mainly takes UE/terminal as a vehicle.
The Base Station (BS) related to the present invention is a device deployed in a radio access network to provide a wireless communication function for a UE. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functions may be different, for example, in an LTE network, the device is called an evolved node B (eNB or eNodeB), in a third generation 3G network, the device is called a node B (node B), and so on. For convenience of description, the above-mentioned apparatuses for providing a UE with a wireless communication function are collectively referred to as a base station or a BS in the present invention.
When each terminal selects a communication resource, two or more terminals may select the same communication resource, thereby causing a collision or collision (collision/collision) in terms of resource occupation, which may be referred to as collision or resource collision in the present invention.
In the present invention, the control device is a device that plans or coordinates communication resources used by the terminals in order to avoid resource conflicts. As an example, the control device may be a base station, or an RSU (Road Side Unit), or the like.
The techniques described herein may be applicable to LTE systems, or other wireless communication systems that employ various wireless access techniques, such as systems that employ code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, single carrier frequency division multiple access, and the like. In addition, the method can also be applied to a subsequent evolution system using an LTE system, such as a fifth generation 5G system and the like. For clarity, the LTE system is only exemplified here. In the LTE system, an Evolved UMTS Terrestrial Radio Access (E-UTRAN) is used as a Radio Access Network, and an Evolved Packet Core (EPC) is used as a Core Network. The UE accesses the IMS network through E-UTRAN and EPC.
The embodiments of the present invention will be described in further detail below based on the common aspects of the present invention described above.
Fig. 1 is a schematic diagram of a scenario in the present invention. In fig. 1, 101 to 103 are all vehicles (vehicles), and the vehicles can perform direct communication with each other, for example, each Vehicle can receive and transmit safety information including a Vehicle speed, a driving direction, a specific position, whether an emergency brake is stepped on, and the like, so that driving safety is better ensured. Such communication between vehicles may be referred to as V2V (Vehicle to Vehicle), which may specifically be implemented based on D2D technology in LTE as an example. In fig. 1, there may also be a control device 104, for example, the control device 104 may be a base station or an RSU (Road Side Unit). The RSU may be a UE-Type RSU (UE-Type RSU) or a base station-Type RSU, which is not limited in the present invention.
Since the D2D distributed transmission mode adopts a random transmission mechanism, there may be a case where multiple vehicles randomly select the same resource and transmit data, which may cause a conflict of resource occupation. As an example, as shown in fig. 2, the vehicle 101 and the vehicle 103 both select the same resource block for message transmission, and thus a collision occurs, but the vehicles 101 and 103 do not know that a collision has occurred between them, so no countermeasure is taken, and as a result, the resource collision continues, which affects the reliability of information transmission and reduces the security of the whole system.
Fig. 3 is a flowchart illustrating a communication resource coordination method according to an exemplary embodiment of the present invention. The method may be used for controlling a device, such as a base station or RSU.
Referring to fig. 3, the method may include the steps of:
step S301, obtains reference signal received power RSRP of a communication resource used by the received data packet.
Taking the V2V scenario as an example, each vehicle may broadcast a data packet, i.e., safety information, including the speed, the driving direction, the specific location, whether emergency brake is applied, and the like, to the outside, and the RSU may receive the safety information broadcast by each vehicle, so as to detect RSRP of the related communication resource.
As an example, referring to fig. 4, in fig. 4, the roadside unit 104 receives the safety information broadcasted by each vehicle, and can detect the RSRP value of each related communication resource.
Step S302, judging whether the RSRP meets a preset condition.
The specific content of the preset condition is not limited in this embodiment, and those skilled in the art can design the preset condition according to different scenarios or requirements.
As an example, the preset condition may include:
the duration that the RSRP is greater than the preset threshold exceeds a first preset duration, and data carried by a data packet using the communication resource cannot be demodulated.
Taking the UE-Type RSU as an example, the UE-Type RSU may determine whether each communication resource generates a collision based on RSRP power detection. When reading SA (Scheduling Assignment) and finding that there is data packet transmission on a certain communication resource, and RSRP of the resource is greater than a certain power threshold and exceeds the threshold for a period of time, but data at the resource location cannot be demodulated, it indicates that the probability of resource collision is high, that is, it can be inferred that at least two terminals select the same resource for data transmission, which causes resource collision.
In addition, the above power threshold used by the RSU and the time to exceed the threshold may be pre-configured by itself. For the UE-Type RSU, the power threshold used by the UE-Type RSU and the time exceeding the threshold may also be configured for the UE-Type RSU by the upper level (e.g., RSU of base station Type) using dedicated signaling.
Step S303, if the RSRP meets a preset condition, an external broadcast message is sent, where the message is used to indicate that the communication resource has collided, so that the terminal using the communication resource selects another communication resource for data packet retransmission.
As an example, as shown in fig. 5, after discovering that a resource conflict occurs, the roadside unit 104 broadcasts the resource that has the conflict to the outside through the message, and after receiving the message, each vehicle can determine whether the communication resource used by itself encounters the resource conflict according to the message, and then take a countermeasure.
The embodiment is not limited to the specific content of the message, and a person skilled in the art can design the message according to different scenarios or requirements.
As an example, the message may be a dedicated indication message, or the message may be generated by adding bits to an existing message.
For example, after the RSU detects a resource collision, the RSU may notify the collision situation in two ways, one is through a dedicated collision indication packet, i.e. a dedicated indication message, and the other is through adding bit information in a MAC (Medium Access Control) header to indicate the collision situation.
When the message is a special indication message, the special indication message is sent by the control device once every P/2 duration, the special indication message is used for indicating communication resources which conflict in the past P/2 duration, each communication resource is indicated by a first preset number of bits, and P is the maximum time delay when the data packet is sent.
As an example, each resource location may be represented by 8 bits, each resource location being identified in turn by frequency and time.
Referring to fig. 6 and 7, an example of a dedicated indication message, that is, a collision indication packet, is given in fig. 7, and in fig. 6, in addition to a Source identifier (Source ID) occupying 24 bits and a destination identifier (Target ID) occupying 16 bits, the packet further includes a payload (payload) for indicating a communication resource where collision occurs, and the payload may include several bits.
Referring to fig. 7, a first part (symbol #1) in payload indicates one resource location where a collision occurs, a second part (symbol #2) indicates another resource location where a collision occurs, and so on.
When the message is generated by adding bits to an existing message, the message is a media access control MAC message in which a second number of bits are added to a header of the message, and the second number of bits are used to indicate a communication resource that has collided within a second preset time period recently.
For example, 16 bits may be added to the MAC header to indicate whether a resource collision occurred in the past 5 ms. For example, referring to fig. 8 and 9, a modified MAC sub-header format is shown in fig. 8, and V2V MAC sub-header is used to indicate the collision situation. In fig. 9, there are 15 resources in total, which can be indicated by 16 bits, wherein the bit with a value of 1 represents that the corresponding resource generates a collision.
In this embodiment, for the problem that the terminal does not know whether the communication resource selected by itself conflicts with other terminals, the control device such as the roadside unit is used to detect the resource conflict situation of each terminal and timely notify each terminal, so that the terminal can know whether the used resource conflicts and reselect the resource when the conflict occurs, and timely retransmit the data packet, thereby reducing the probability of conflict again, effectively avoiding the occurrence of persistent conflict, further enhancing the reliability of data packet transmission, and also improving the system security.
Fig. 10 is a flowchart illustrating a communication resource coordination method according to an exemplary embodiment of the present invention. The method can be used for terminals such as vehicles and the like.
Referring to fig. 10, the method may include the steps of:
step S1001, receiving a message, where the message is used to indicate a communication resource with a conflict.
For example, the specific structure, content, and the like of the message may be referred to above, and are not described herein again.
Step S1002, according to the message, judging whether the communication resource used by the terminal conflicts.
Step S1003, if the communication resource used by the terminal conflicts, reselecting the communication resource for retransmission of the data packet.
If the communication resources used by the terminal do not conflict, the data transmission can be performed in the next transmission period by still using the original resources.
The embodiment is not limited to how to specifically reselect the communication resource, and those skilled in the art can design the communication resource according to different scenarios or requirements. Reselection may be performed randomly among the alternative resources, for example.
In this embodiment or some other embodiments of the present invention, the reselecting communication resources may include:
and selecting a specified communication resource for retransmitting the data packet in the remaining time of the current transmission period, wherein the specified communication resource is the communication resource which is closest to the communication resource which conflicts in the idle communication resources.
For example, if a communication resource occupied by the terminal when transmitting a data packet in an nth subframe (one subframe corresponds to 1ms) in a transmission period conflicts, a communication resource closest to the conflicting communication resource is selected from idle communication resources in the remaining P-N time of the period to perform retransmission of the data packet, where P is a maximum time delay (unit is also ms) when the data packet is transmitted, that is, the length of the transmission period.
In addition, in some cases, that is, no idle communication resource is available, other measures may be taken, and this embodiment is not limited thereto.
In this or some other embodiments of the invention, if no free communication resources are available, the communication resource with the lowest detected RSRP is taken as the designated communication resource. For example, the communication resource with the smallest RSRP detected in the last transmission period may be used as the designated communication resource.
This means that a resource reserved by a vehicle farthest from the vehicle is selected for multiplexing, so as to avoid interference of a closer vehicle as much as possible.
Furthermore, when at least two of the messages are received and there is a contradiction between the at least two messages and the indication of the conflicting communication resource, the contradiction is handled using a preset policy.
For example, when one message indicates that the communication resource selected by the vehicle conflicts (denoted by 1) and another message indicates that the communication resource selected by the vehicle does not conflict (denoted by 0), and there is a conflict between the two messages, the two messages may be processed by using a preset policy of "or", that is, performing a boolean operation of "or" on the two indications (1 or 0 ═ 1), in other words, the preset policy may be: a communication resource is determined to be in conflict whenever a message indicates that the communication resource is in conflict.
In this embodiment, for the problem that the terminal does not know whether the communication resource selected by itself conflicts with other terminals, the control device such as the roadside unit is used to detect the resource conflict situation of each terminal and timely notify each terminal, so that the terminal can know whether the used resource conflicts and reselect the resource when the conflict occurs, and timely retransmit the data packet, thereby reducing the probability of conflict again, effectively avoiding the occurrence of persistent conflict, further enhancing the reliability of data packet transmission, and also improving the system security.
The solution of the invention is further described below in connection with a scenario.
Fig. 11 is a signaling diagram illustrating a communication resource coordination method according to an exemplary embodiment of the present invention. In fig. 11, U1, U2... Un are both vehicles, in addition to RSUs.
In step S1101, the RSU broadcasts the preconfiguration information to each vehicle within the coverage area through the PSBCH channel.
For example, the pre-configuration information may include transmission resources allocated by the RSU, and so on.
In step S1102, Un transmits a data packet (e.g. MAC PDU) to the outside using the communication resource selected by itself, and is received by RSU.
The PDU is a Protocol Data Unit.
In step S1103, the U2 sends out a data packet (e.g., MAC PDU) using the communication resource selected by itself, and is received by the RSU.
In step S1104, U1 uses its own selected communication resource to externally transmit data packet (e.g., MAC PDU), which is received by RSU.
In step S1105, the RSU detects a packet transmitted by each vehicle, and finds that a collision occurs on a certain communication resource.
In step S1106, the RSU notifies each vehicle of the conflict of the communication resources by a dedicated instruction message.
In step S1107, each vehicle checks whether or not a conflict occurs in the communication resource used by itself.
In step S1108, the U1 finds that the communication resource used by itself is conflicted, and then performs back-off, that is, reselects another communication resource, and transmits the data packet using the reselected communication resource.
In this embodiment, for the problem that the terminal does not know whether the communication resource selected by itself conflicts with other terminals, the control device such as the roadside unit is used to detect the resource conflict situation of each terminal and timely notify each terminal, so that the terminal can know whether the used resource conflicts and reselect the resource when the conflict occurs, and timely retransmit the data packet, thereby reducing the probability of conflict again, effectively avoiding the occurrence of persistent conflict, further enhancing the reliability of data packet transmission, and also improving the system security.
Fig. 12 is a schematic diagram illustrating a communication resource coordination apparatus, which may be used for controlling a device, according to an exemplary embodiment of the present invention, and may include:
a power obtaining unit 1201, configured to obtain reference signal received power RSRP of a communication resource used by the received data packet;
a power determining unit 1202, configured to determine whether the RSRP acquired by the power acquiring unit 1201 meets a preset condition;
a message sending unit 1203, configured to send an external broadcast message when the power determining unit 1202 determines that the RSRP meets a preset condition, where the message is used to indicate that the communication resource has collided, so that a terminal using the communication resource selects another communication resource for data packet retransmission.
In this embodiment or some other embodiments of the present invention, the preset conditions include:
the duration that the RSRP is greater than the preset threshold exceeds a first preset duration, and data carried by a data packet using the communication resource cannot be demodulated.
In this embodiment or some other embodiments of the present invention, the message is a dedicated indication message, or the message is generated by adding bits to an existing message.
In this embodiment or some other embodiment of the invention:
when the message is a special indication message, the special indication message is sent by the control device once every P/2 duration, the special indication message is used for indicating communication resources which conflict in the past P/2 duration, each communication resource is indicated by a first preset number of bits, and P is the maximum time delay when the data packet is sent.
In this embodiment or some other embodiment of the invention:
when the message is generated by adding bits to an existing message, the message is a media access control MAC message in which a second number of bits are added to a header of the message, and the second number of bits are used to indicate a communication resource that has collided within a second preset time period recently.
Fig. 13 is a schematic diagram illustrating a communication resource coordination apparatus, which may be used for a terminal, according to an exemplary embodiment of the present invention, and the apparatus may include:
a message receiving unit 1301, configured to receive a message, where the message is used to indicate a communication resource where a collision occurs;
a conflict judging unit 1302, configured to judge whether a communication resource used by the terminal conflicts according to the message received by the message receiving unit 1301;
a resource reselecting unit 1303, configured to reselect a communication resource for retransmission of a data packet when the collision judging unit 1302 determines that a collision occurs in the communication resource used by the terminal.
In this embodiment or some other embodiments of the present invention, the reselecting communication resources includes:
and selecting a specified communication resource for retransmitting the data packet in the remaining time of the current transmission period, wherein the specified communication resource is the communication resource which is closest to the communication resource which conflicts in the idle communication resources.
In this embodiment or some other embodiments of the present invention, the resource reselection unit is further configured to:
if no idle communication resources are available, the communication resource with the minimum detected RSRP is taken as the designated communication resource.
In this embodiment or some other embodiments of the present invention, the apparatus further comprises:
and the conflict processing unit is used for processing the conflict by using a preset strategy when the message receiving unit receives at least two messages and the indication of the at least two messages to the conflicted communication resource is contradictory.
With regard to the apparatus in the above-described embodiment, the specific manner in which each unit performs the operation has been described in detail in the embodiment related to the method, and will not be described in detail here.
Fig. 14 shows a simplified schematic diagram of a possible design structure of the UE involved in the above embodiments. The UE may include, for example, a transmitter 1401, a receiver 1402, a controller/processor 1403, a memory 1404, and a modem processor 1405.
A transmitter 1401 conditions (e.g., converts to analog, filters, amplifies, and frequency upconverts, etc.) the output samples and generates an uplink signal, which is transmitted via an antenna to a base station or the like. On the downlink, an antenna receives a downlink signal transmitted by a base station or the like. Receiver 1402 conditions (e.g., filters, amplifies, downconverts, and digitizes, etc.) the received signal from the antenna and provides input samples. In modem processor 1405, an encoder 1406 receives traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, encodes, and interleaves) the traffic data and signaling messages. A modulator 1407 further processes (e.g., symbol maps and modulates) the coded traffic data and signaling messages and provides output samples. A demodulator 1409 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 1408 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the UE. The encoder 1406, modulator 1407, demodulator 1409, and decoder 1408 may be implemented by a combined modem processor 1405. These elements are processed in accordance with the radio access technology employed by the radio access network (e.g., the access technologies of LTE and other evolved systems).
A controller/processor 1403 performs control management of the actions of the UE for performing the processing performed by the UE in the above-described embodiments. For example, to control the UE to receive messages, to determine from the messages whether a collision of communication resources used by the UE has occurred, and/or other processes of the techniques described herein. By way of example, the controller/processor 1403 is configured to support the UE to perform the method shown in fig. 10. A memory 1404 is used to store program codes and data for the UE, etc.
Fig. 15 shows a schematic diagram of a possible structure of the base station involved in the above embodiment.
The base station comprises a transmitter/receiver 1501, a controller/processor 1502, a memory 1503 and a communication unit 1504. The transmitter/receiver 1501 is used to support information transceiving between a base station and the UE described in the above embodiments, and to support radio communication between the UE and other UEs. The controller/processor 1502 performs various functions for communicating with the UEs. In the uplink, uplink signals from the UE are received via the antenna, conditioned by the receiver 1501, and further processed by the controller/processor 1152 to recover traffic data and signaling information sent by the UE. On the downlink, traffic data and signaling messages are processed by controller/processor 1502 and conditioned by transmitter 1501 to generate a downlink signal, which is transmitted via the antenna to the UEs.
The controller/processor 1502 also performs the method of fig. 3 and/or other processes for the techniques described herein. E.g. reference signal received power, RSRP, used to acquire the communication resources used by the received data packets, etc. A memory 1503 is used to store the program codes and data of the base stations. A communication unit 1504 is used to support base station communication with other network entities.
It will be appreciated that fig. 15 only shows a simplified design of a base station. In practice, the base station may comprise any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the present invention are within the scope of the present invention.
The controller/processor for performing the above-described functions of the base station and UE of the present invention may be a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in user equipment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
Claims (22)
1. A method for coordinating communication resources, the method being used for controlling devices, the method comprising:
acquiring Reference Signal Received Power (RSRP) of communication resources used by a received data packet;
judging whether the RSRP meets a preset condition or not;
if the RSRP meets a preset condition, an external broadcast message is sent, wherein the message is used for indicating that the communication resources have conflict, so that a terminal using the communication resources selects other communication resources to carry out data packet retransmission;
when the message is a special indication message, the special indication message is sent by the control device once every P/2 duration, the special indication message is used for indicating communication resources which conflict in the past P/2 duration, each communication resource is indicated by a first preset number of bits, and P is the maximum time delay when the data packet is sent;
or, when the message is generated by adding bits to an existing message, the message is a media access control MAC message in which a second number of bits are added to a header of the message, and the second number of bits are used to indicate that a communication resource collided within a second preset time period recently occurs.
2. The method according to claim 1, wherein the preset condition comprises:
the duration that the RSRP is greater than the preset threshold exceeds a first preset duration, and data carried by a data packet using the communication resource cannot be demodulated.
3. The method of claim 1, wherein the message is a dedicated indication message or is generated by adding bits to an existing message.
4. The method according to any one of claims 1 to 3, wherein the terminal is a vehicle, the control device is a base station or a roadside unit (RSU), and the data packet is safety information for ensuring driving safety.
5. A method for coordinating communication resources, the method being used for a terminal, the method comprising:
receiving a broadcast message in the method of any one of claims 1-4, the broadcast message indicating conflicting communication resources;
judging whether the communication resources used by the terminal conflict or not according to the broadcast message;
and if the communication resources used by the terminal conflict, reselecting the communication resources for retransmitting the data packet.
6. The method of claim 5, wherein the reselecting communication resources comprises:
and selecting a specified communication resource for retransmitting the data packet in the remaining time of the current transmission period, wherein the specified communication resource is the communication resource which is closest to the communication resource which conflicts in the idle communication resources.
7. The method of claim 6, further comprising:
if no idle communication resources are available, the communication resource with the minimum detected RSRP is taken as the designated communication resource.
8. The method of claim 5, further comprising:
and when at least two messages are received and the indications of the at least two messages on the conflicted communication resources are contradictory, processing the contradiction by using a preset strategy.
9. The method according to any one of claims 5 to 8, wherein the terminal is a vehicle, the control device is a base station or a roadside unit (RSU), and the data packet is a safety message for ensuring driving safety.
10. An apparatus for communication resource coordination, the apparatus configured to control a device, the apparatus comprising:
a power obtaining unit, configured to obtain reference signal received power RSRP of a communication resource used by a received data packet;
the power judging unit is used for judging whether the RSRP acquired by the power acquiring unit meets a preset condition or not;
a message sending unit, configured to broadcast a message to the outside when the power determining unit determines that the RSRP meets a preset condition, where the message is used to indicate that the communication resource has collided, so that a terminal using the communication resource selects another communication resource for packet retransmission;
when the message is a special indication message, the special indication message is sent by the control device once every P/2 duration, the special indication message is used for indicating communication resources which conflict in the past P/2 duration, each communication resource is indicated by a first preset number of bits, and P is the maximum time delay when the data packet is sent;
when the message is generated by adding bits to an existing message, the message is a media access control MAC message in which a second number of bits are added to a header of the message, and the second number of bits are used to indicate a communication resource that has collided within a second preset time period recently.
11. The apparatus of claim 10, wherein the preset condition comprises:
the duration that the RSRP is greater than the preset threshold exceeds a first preset duration, and data carried by a data packet using the communication resource cannot be demodulated.
12. The apparatus of claim 10, wherein the message is a dedicated indication message or is generated by adding bits to an existing message.
13. The apparatus according to any one of claims 10 to 12, wherein the terminal is a vehicle, the control device is a base station or a roadside unit (RSU), and the data packet is safety information for ensuring driving safety.
14. An apparatus for coordinating communication resources, the apparatus being for a terminal, the apparatus comprising:
a message receiving unit configured to receive a message indicating a communication resource in which a collision occurs, according to any one of claims 10 to 13;
a conflict judging unit, configured to judge whether a communication resource used by the terminal conflicts according to the message received by the message receiving unit;
and the resource reselection unit is used for reselecting the communication resource to retransmit the data packet when the conflict judgment unit determines that the communication resource used by the terminal conflicts.
15. The apparatus of claim 14, wherein the reselecting communication resources comprises:
and selecting a specified communication resource for retransmitting the data packet in the remaining time of the current transmission period, wherein the specified communication resource is the communication resource which is closest to the communication resource which conflicts in the idle communication resources.
16. The apparatus of claim 15, wherein the resource reselection unit is further configured to:
if no idle communication resources are available, the communication resource with the minimum detected RSRP is taken as the designated communication resource.
17. The apparatus of claim 14, further comprising:
and the conflict processing unit is used for processing the conflict by using a preset strategy when the message receiving unit receives at least two messages and the indication of the at least two messages to the conflicted communication resource is contradictory.
18. The apparatus according to any one of claims 14 to 17, wherein the terminal is a vehicle, the control device is a base station or a roadside unit (RSU), and the data packet is a safety message for ensuring driving safety.
19. A control apparatus, characterized by comprising:
a receiver for receiving a data packet;
at least one processor, configured to obtain reference signal received power, RSRP, of a communication resource used by a received data packet, determine whether the RSRP meets a preset condition, and if the RSRP meets the preset condition, use a transmitter to broadcast a message to the outside, where the message is used to indicate that the communication resource has collided, so that a terminal using the communication resource selects another communication resource for data packet retransmission;
a transmitter for broadcasting the message to the outside;
when the message is a special indication message, the special indication message is broadcast once every P/2, the special indication message is used for indicating communication resources which conflict in the past P/2 time length, each communication resource is indicated by a first preset number of bits, and P is the maximum time delay when the data packet is sent;
or, when the message is generated by adding bits to an existing message, the message is a media access control MAC message in which a second number of bits are added to a header of the message, and the second number of bits are used to indicate that a communication resource collided within a second preset time period recently occurs.
20. A terminal, comprising:
a receiver for receiving a broadcast message from the control device of claim 19, the broadcast message indicating the conflicting communication resources;
at least one processor, configured to determine whether a communication resource used by the terminal conflicts according to the broadcast message, and reselect the communication resource to retransmit a data packet if the communication resource used by the terminal conflicts;
a transmitter for retransmitting the data packet using the reselected communication resource.
21. A communication system, characterized in that the system comprises a terminal according to claim 20 and a control device according to claim 19.
22. A computer-readable storage medium having stored thereon instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/078896 WO2017173665A1 (en) | 2016-04-08 | 2016-04-08 | Communication resource coordination method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108886769A CN108886769A (en) | 2018-11-23 |
| CN108886769B true CN108886769B (en) | 2021-05-18 |
Family
ID=60000201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680084043.XA Active CN108886769B (en) | 2016-04-08 | 2016-04-08 | Communication resource coordination method and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108886769B (en) |
| WO (1) | WO2017173665A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011375A1 (en) * | 2021-08-06 | 2023-02-09 | 华为技术有限公司 | Sidelink transmission method, device, and storage medium |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI682673B (en) * | 2017-11-16 | 2020-01-11 | 財團法人工業技術研究院 | User equipment and resource sensing and selection method thereof |
| CN110859010B (en) * | 2018-08-24 | 2024-04-16 | 华为技术有限公司 | Conflict detection method and device for realizing data transmission |
| EP3890371A4 (en) * | 2018-11-29 | 2022-07-06 | Beijing Xiaomi Mobile Software Co., Ltd. | Resource collision solution method and apparatus, and storage medium |
| CN111756487B (en) * | 2019-03-29 | 2022-02-01 | 大唐高鸿智联科技(重庆)有限公司 | Resource reselection method, node equipment and resource reselection device |
| CN111615190B (en) * | 2019-04-23 | 2023-01-10 | 维沃移动通信有限公司 | Processing method and device |
| CN113890697B (en) * | 2020-07-02 | 2023-04-18 | 维沃移动通信有限公司 | Method and device for notifying side link auxiliary information and electronic equipment |
| US20230345309A1 (en) * | 2020-08-26 | 2023-10-26 | Beijing Xiaomi Mobile Software Co., Ltd. | Sidelink communication methods, sidelink communication apparatus, and storage medium |
| EP4192095A4 (en) * | 2020-09-09 | 2023-10-04 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Resource reselection method and apparatus, and terminal and storage medium |
| CN112640499A (en) * | 2020-12-14 | 2021-04-09 | 北京小米移动软件有限公司 | Resource selection method, resource selection device, and storage medium |
| WO2022193274A1 (en) * | 2021-03-19 | 2022-09-22 | Lenovo (Beijing) Limited | Methods and apparatuses for a resource conflict indicator transmission |
| CN113163428B (en) * | 2021-05-19 | 2023-03-24 | 浙江凡双科技有限公司 | 5G data transmission method with low complexity, low time delay and low signaling overhead |
| WO2024065244A1 (en) * | 2022-09-28 | 2024-04-04 | Qualcomm Incorporated | Inter-user equipment coordination in sidelink |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469617A (en) * | 2010-11-19 | 2012-05-23 | 普天信息技术研究院有限公司 | Competition random access method |
| CN103209492A (en) * | 2011-09-15 | 2013-07-17 | 华为技术有限公司 | Radio resource management method and communication device |
| CN103718633A (en) * | 2013-08-30 | 2014-04-09 | 华为技术有限公司 | Method, device and system for resource allocation |
| CN104185281A (en) * | 2013-05-22 | 2014-12-03 | 电信科学技术研究院 | Resource allocation and resource use methods and devices in D2D communication |
| JP2015089023A (en) * | 2013-10-31 | 2015-05-07 | 株式会社Ｎｔｔドコモ | Radio base station, user equipment and radio communication method |
| CN104640145A (en) * | 2013-11-13 | 2015-05-20 | 普天信息技术有限公司 | Method and system for solving time-frequency resource conflicts |
| EP2903366A1 (en) * | 2014-01-31 | 2015-08-05 | Institute for Imformation Industry | Base station and device to device user equipment for a wireless communication system |
| CN105101450A (en) * | 2014-05-20 | 2015-11-25 | 华为技术有限公司 | Broadcasting resource scheduling method, user equipment and base station |
| WO2016045568A1 (en) * | 2014-09-22 | 2016-03-31 | 电信科学技术研究院 | Method and device for d2d resource allocation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015142141A1 (en) * | 2014-03-21 | 2015-09-24 | Samsung Electronics Co., Ltd. | Contention-based resource allocation method and apparatus for low power d2d communication |
-
2016
- 2016-04-08 CN CN201680084043.XA patent/CN108886769B/en active Active
- 2016-04-08 WO PCT/CN2016/078896 patent/WO2017173665A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469617A (en) * | 2010-11-19 | 2012-05-23 | 普天信息技术研究院有限公司 | Competition random access method |
| CN103209492A (en) * | 2011-09-15 | 2013-07-17 | 华为技术有限公司 | Radio resource management method and communication device |
| CN104185281A (en) * | 2013-05-22 | 2014-12-03 | 电信科学技术研究院 | Resource allocation and resource use methods and devices in D2D communication |
| CN103718633A (en) * | 2013-08-30 | 2014-04-09 | 华为技术有限公司 | Method, device and system for resource allocation |
| JP2015089023A (en) * | 2013-10-31 | 2015-05-07 | 株式会社Ｎｔｔドコモ | Radio base station, user equipment and radio communication method |
| CN104640145A (en) * | 2013-11-13 | 2015-05-20 | 普天信息技术有限公司 | Method and system for solving time-frequency resource conflicts |
| EP2903366A1 (en) * | 2014-01-31 | 2015-08-05 | Institute for Imformation Industry | Base station and device to device user equipment for a wireless communication system |
| CN105101450A (en) * | 2014-05-20 | 2015-11-25 | 华为技术有限公司 | Broadcasting resource scheduling method, user equipment and base station |
| WO2016045568A1 (en) * | 2014-09-22 | 2016-03-31 | 电信科学技术研究院 | Method and device for d2d resource allocation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011375A1 (en) * | 2021-08-06 | 2023-02-09 | 华为技术有限公司 | Sidelink transmission method, device, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017173665A1 (en) | 2017-10-12 |
| CN108886769A (en) | 2018-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108886769B (en) | Communication resource coordination method and device | |
| CN108476390B (en) | Method and apparatus for transmission collision detection and handling in vehicle-to-all communication system | |
| CN108632779B (en) | Resource allocation method and device and resource reservation method and device | |
| CN112672275B (en) | Information transmission method and user equipment | |
| CN111819888B (en) | Emergency notification requesting spontaneous license-free transmission of V2X | |
| CN107667566B (en) | Scheduling assignment transmission in device-to-device communication | |
| EP3500041B1 (en) | Method for transmitting service data, access point and station | |
| US11647514B2 (en) | Communications device, infrastructure equipment, wireless telecommunications system and methods | |
| JP2018525904A (en) | Wireless communication system, apparatus and method on base station side and user equipment side | |
| EP3793296B1 (en) | Communication method and device | |
| US10736152B2 (en) | Method for resolving resource collision in V2X communication environment and mobile device therefor | |
| CN110351687B (en) | V2V resource allocation method and device | |
| CN109792789B (en) | Method of selectively decoding scheduling assignment and/or sidelink data transmission and related wireless communication device | |
| US20220239446A1 (en) | Information transmission method and apparatus, storage medium and electronic apparatus | |
| CN109155986B (en) | Communication method and terminal | |
| CN116349349A (en) | NR side link multiplexing control/data multiplexing | |
| KR20180054785A (en) | Control signaling processing method, apparatus, and device | |
| CN107113819B (en) | Communication equipment, network equipment and equipment-to-equipment data transmission method | |
| US9699809B2 (en) | Semi-persistent resource allocation of small packet transmission | |
| CN111149400B (en) | Method for directly connecting link data transmission, terminal equipment and network equipment | |
| CN108886534B (en) | Communication resource allocation method and device | |
| KR102147114B1 (en) | Method for public safety communication and apparatus for the same | |
| CN112997574A (en) | Random access method, terminal equipment and network equipment | |
| US20240057211A1 (en) | Methods for resource reservation of a contention-based sidelink transmission and related wireless devices | |
| CN114402693B (en) | Wireless communication method and terminal equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |