CN114257991A - Indication method and device, storage medium and terminal for vehicle-mounted short-range communication paging node - Google Patents
Indication method and device, storage medium and terminal for vehicle-mounted short-range communication paging node Download PDFInfo
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Abstract
一种车载短距离通信寻呼节点的指示方法及装置、存储介质、终端，所述方法包括：接收管理节点发送的寻呼节点指示信令，所述寻呼节点指示信令指示各个终端节点是否为被呼节点；根据所述寻呼节点指示信令确定当前终端节点是否为被呼节点，若确定结果为是，则触发随机接入过程进入连接态接收下行数据；其中，所述被呼节点为多个终端节点中的一个或多个。由此，在有下行数据要传输给处于空闲状态的终端节点时，能够及时寻呼终端节点，使得对应的终端节点触发接入过程进入连接态后接收下行数据，避免造成数据丢失。
A method, device, storage medium, and terminal for indicating a paging node for vehicle-mounted short-distance communication, the method comprising: receiving paging node indication signaling sent by a management node, the paging node indication signaling indicating whether each terminal node is is the called node; according to the paging node indication signaling, determine whether the current terminal node is the called node, if the determination result is yes, trigger the random access process to enter the connected state to receive downlink data; wherein, the called node is one or more of multiple endpoints. Therefore, when there is downlink data to be transmitted to the terminal node in the idle state, the terminal node can be paged in time, so that the corresponding terminal node triggers the access process to enter the connected state and then receives the downlink data to avoid data loss.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an indication method and device of a vehicle-mounted short-distance communication paging node, a storage medium and a terminal.
Background
The vehicle-mounted short-distance communication system is a system for interconnection and communication among vehicle-mounted devices, including a cabin domain controller, vehicle-mounted terminals (such as vehicle-mounted audio devices, vehicle-mounted video devices and anti-theft systems), smart phones and intelligent wearing devices. Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle-mounted short-range communication system in the prior art. The G Node is a management Node (G-Node for short), and is a Node for transmitting data scheduling information in a vehicle-mounted wireless short-distance communication system; the T Node is a Terminal Node (T-Node for short), and is a Node responsible for receiving data scheduling information and sending data according to the data scheduling information in the vehicle-mounted wireless short-distance communication system. The Physical Layer Identity (PID) is an Identity used for Physical Layer addressing.
Specifically, the T nodes each support a physical layer initial Access (RA) procedure, so that the G node acquires information of a plurality of T nodes. The T node performs random access based on the physical layer ID, and the physical layer TD at least comprises a physical layer identification domain of non-competitive access and a physical layer identification domain of competitive access. The G node is responsible for maintaining the mapping relation between the T node of the communication domain and the physical layer ID, and each T node in the communication domain corresponds to a unique physical layer ID. The physical layer ID of each T node may be configured by pre-configuration or by the G node. The physical layer ID of each T node may also be used for scheduling, the physical layer identification used for scheduling not being within the physical layer identification domain of the contention access.
However, conventionally, when a T node is in an Idle (Idle) state, if downlink data arrives, the corresponding T node may not be indicated, and data loss may be caused.
Disclosure of Invention
The technical problem solved by the invention is how to avoid the loss of downlink data caused by the idle state of the T node in the scene of vehicle-mounted short-distance communication.
In order to solve the problem, the invention provides an indication method of a vehicle-mounted short-distance communication paging node, which comprises the following steps: receiving a paging node indication signaling sent by a management node, wherein the paging node indication signaling indicates whether each terminal node is a called node or not; determining whether the current terminal node is a called node according to the paging node indication signaling, and if so, triggering a random access process to enter a connected state to receive downlink data; wherein the called node is one or more of a plurality of terminal nodes.
Optionally, the dividing of the terminal node into a plurality of groups, where the paging node indication signaling includes DCI and a paging message, where the DCI is used to indicate a group in which a called node is located, and the receiving of the paging node indication signaling sent by the management node includes: receiving the DCI, wherein the DCI is scrambled through a preset physical layer ID; descrambling the DCI through a preset physical layer ID; the determining whether the current terminal node is a called node according to the paging node indication signaling includes: determining whether a group in which the current terminal node is located has a called node according to the descrambled DCI; if yes, continuing to receive the paging message, and determining whether the current terminal node is a called node according to the paging message.
Optionally, the DCI is for terminal nodes of all groups, and the DCI includes a group indication field for indicating whether a called node exists in each group; the determining whether the current terminal node is a called node according to the descrambled DCI includes: and determining whether a called node exists in the group where the current terminal node is located according to the DCI group indication domain.
Optionally, after receiving the DCI, the method further includes: determining the number of groups of all terminal nodes according to the length of the group indication domain; and determining the group where the current terminal node is located according to the self identification of the current terminal node and the number of the groups.
Optionally, the determining, according to the paging message, whether the current terminal node is a called node includes: comparing the characteristic information of the current terminal node with the characteristic information of the called node, and when the characteristic information of the current terminal node is consistent with the characteristic information of the called node, the current terminal node is the called node; the characteristic information is at least one of a physical layer ID, a self identification or non-competitive access resource, the non-competitive access resource is in one-to-one correspondence with the terminal node, and the correspondence between the non-competitive access resource and the terminal node is determined through a predefined rule.
Optionally, the terminal nodes are divided into a plurality of groups, the paging node indication signaling includes DCI, and the DCI is scrambled by different preset physical layer IDs to target different groups of terminal nodes; the receiving of the paging node indication signaling sent by the management node includes: and receiving the DCI, descrambling the DCI through a preset physical layer ID corresponding to the group where the current terminal node is located, and if descrambling is successful, continuing to execute the step of determining whether the current terminal node is a called node according to the paging node indication signaling.
Optionally, the DCI further indicates to receive a bitmap message, and the determining, according to the paging node indication signaling, whether the current terminal node is a called node includes: and continuously receiving the bitmap message to determine whether the current terminal node is a called node according to the bitmap message, wherein the bitmap message is used for indicating whether each terminal node in a group where the called node is located is called.
Optionally, the DCI includes a bitmap field, where the bitmap field is used to indicate whether each terminal node in a group where a called node is located is called.
Optionally, the paging node indication signaling includes an orthogonal sequence, each terminal node corresponds to a different orthogonal sequence, and the receiving of the paging node indication signaling sent by the management node includes: receiving a target orthogonal sequence sent by the management node on a preset resource; the determining whether the current terminal node is a called node according to the paging node indication signaling includes: and if the target orthogonal sequence is the orthogonal sequence corresponding to the current node, the current node is the called node.
Optionally, the preset resource has periodicity.
The embodiment of the invention also provides an indication method of the vehicle-mounted short-distance communication paging node, which comprises the following steps: sending a paging node indication signaling to one or more terminal nodes, so that each terminal node determines whether the terminal node is a called node according to the paging node indication signaling, and triggers a random access process to enter a connection state to receive downlink data when the terminal node determines that the terminal node is the called node; the paging node indication signaling indicates whether each terminal node is a called node, and the called node is one or more of a plurality of terminal nodes.
Optionally, the dividing the terminal nodes into a plurality of groups, where the paging node indication signaling includes DCI and a paging message, and before sending the paging node indication signaling to one or more terminal nodes, the method further includes: generating the DCI, wherein the DCI is used for indicating a group where a called node is located; scrambling the DCI by a preset physical layer ID; the sending paging node indication signaling to one or more terminal nodes comprises: sending the DCI so that each terminal node descrambles the DCI through a preset physical layer ID after receiving the DCI; and generating a paging message and sending the paging message, so that the terminal node of the group where the called node is positioned receives the paging message and determines whether the terminal node is the called node.
Optionally, the DCI is for all groups of terminal nodes, where the DCI includes a group indication field, and the generating the DCI includes: and generating the group indication domain of the DCI according to whether the called node exists in each group.
Optionally, the generating the DCI further includes: and determining the length of the group indication domain according to the number of the groups of all the terminal nodes, so that the terminal nodes can determine the groups in which the terminal nodes are located according to the self identification and the number of the groups.
Optionally, the paging message indicates feature information of the called node, so that the terminal node compares whether the feature information of the terminal node is consistent with the feature information of the called node, to determine whether the terminal node is the called node; the characteristic information is at least one of a physical layer ID, a self identification or non-competitive access resource, the non-competitive access resource is in one-to-one correspondence with the terminal node, and the correspondence between the non-competitive access resource and the terminal node is determined through a predefined rule.
Optionally, the dividing the terminal nodes into a plurality of groups, where the paging node indication signaling includes DCI, and before sending the paging node indication signaling to one or more terminal nodes, the method further includes: generating the DCI; scrambling the DCI with different preset physical layer IDs for different groups of terminal nodes; and sending the scrambled DCI so that the terminal node descrambles the DCI according to a preset physical layer ID corresponding to the group where the terminal node is located.
Optionally, the DCI is further configured to instruct the terminal node to receive a bitmap message, and after the sending of the scrambled DCI, the method further includes: generating the bitmap message, wherein the bitmap message is used for indicating whether each terminal node in a group where the called node is located is called or not; and sending the bitmap message, so that the terminal node receiving the bitmap message determines whether the terminal node is a called node or not according to the bitmap message.
Optionally, the DCI includes a bitmap field, and the generating the DCI further includes: and generating the bitmap domain of the DCI according to whether each terminal node in the group where the called node is positioned is called.
Optionally, the paging node indication signaling is an orthogonal sequence, and each terminal node corresponds to a different orthogonal sequence; before the sending the paging node indication signaling to the one or more terminal nodes, the method further includes: determining a target orthogonal sequence corresponding to the called node; the sending paging node indication signaling to one or more terminal nodes comprises: sending the target orthogonal sequence on preset resources so that each terminal node receives the target orthogonal sequence on the preset resources; after each terminal node receives the target orthogonal sequence, if the target orthogonal sequence is judged to be the orthogonal sequence corresponding to the terminal node, the terminal node can be judged to be the called node.
Optionally, the preset resource has periodicity.
The embodiment of the invention also provides an indicating device of the vehicle-mounted short-distance communication paging node, which comprises the following components: a paging node indication signaling receiving module, configured to receive a paging node indication signaling sent by a management node, where the paging node indication signaling indicates whether each terminal node is a called node; a called node determining module, configured to determine whether a current terminal node is a called node according to the paging node indication signaling, and if the current terminal node is the called node, trigger a random access process to enter a connected state to receive downlink data; wherein the called node is one or more of a plurality of terminal nodes.
The embodiment of the invention also provides an indicating device of the vehicle-mounted short-distance communication paging node, which comprises the following components: a paging node indication signaling sending module, configured to send a paging node indication signaling to one or more terminal nodes, so that each terminal node determines whether itself is a called node according to the paging node indication signaling, and when a terminal node determines itself is a called node, triggers a random access process to enter a connected state to receive downlink data; the paging node indication signaling indicates whether each terminal node is a called node, and the called node is one or more of a plurality of terminal nodes.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the invention provides an indication method of a vehicle-mounted short-distance communication paging node, which comprises the following steps: receiving a paging node indication signaling sent by a management node, wherein the paging node indication signaling indicates whether each terminal node is a called node or not; determining whether the current terminal node is a called node according to the paging node indication signaling, and if so, triggering a random access process to enter a connected state to receive downlink data; wherein the called node is one or more of a plurality of terminal nodes. Compared with the prior art, in the scheme of the invention, when downlink data are transmitted to the terminal node in the idle state, the terminal node can be paged in time, so that the corresponding terminal node receives the downlink data after triggering the access process to enter the connected state, and the data loss is avoided.
Further, the group where the called node is located is indicated through the common DCI, so that the terminal node of the group where the called node is located continues to receive the paging message scheduled by the DCI, and whether the terminal node is the called node is determined through the paging message.
Further, the DCI is for a single group, and the preset physical layer IDs for different groups of DCI are different. And each terminal node only knows the preset physical layer ID corresponding to the group where the terminal node is located, and if the DCI is descrambled successfully by the terminal node through the known preset physical layer ID, the terminal node is represented to have a called node in the group where the terminal node is located.
Further, the management node can inform each terminal node whether the terminal node is the called node or not through different orthogonal sequences.
Drawings
Fig. 1 is a schematic diagram of a prior art vehicular short-range communication system;
fig. 2 is a flowchart illustrating a method for indicating a first vehicle-mounted short-range communication paging node according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a second method for indicating a vehicle-mounted short-range communication paging node according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a third method for indicating a vehicle-mounted short-range communication paging node according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a fourth method for indicating a vehicle-mounted short-range communication paging node according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an indicating apparatus of a first vehicle-mounted short-range communication paging node according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an indicating apparatus of a second vehicle-mounted short-range communication paging node according to an embodiment of the present invention.
Detailed Description
As described in the background art, conventionally, when a T node is in an idle state, if downlink data arrives, the T node may not be instructed to the corresponding T node, and data loss may be caused.
In order to solve the above problem, an embodiment of the present invention provides an indication method for a vehicle-mounted short-range communication paging node, where the method includes: receiving a paging node indication signaling sent by a management node, wherein the paging node indication signaling indicates whether each terminal node is a called node or not; determining whether the current terminal node is a called node according to the paging node indication signaling, and if so, triggering a random access process to enter a connected state to receive downlink data; wherein the called node is one or more of a plurality of terminal nodes.
Therefore, the downlink data loss caused by the fact that the T node is in the idle state can be avoided in the scene of vehicle-mounted short-distance communication.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 2, fig. 2 is a flowchart illustrating an indicating method for a vehicle-mounted short-range communication paging node according to an embodiment of the present invention, where the method is executed by a terminal node in a vehicle-mounted short-range communication system, and the terminal node executing the method is referred to as a current terminal node. The method comprises the following steps:
step S201, receiving a paging node indication signaling sent by a management node, wherein the paging node indication signaling indicates whether each terminal node is a called node;
the management node is also a G node, and may also be referred to as a central node. The paging node indication signaling is a signaling sent by the management node to all or part of the terminal nodes, and the signaling is used for informing that each terminal node (i.e. T node) currently has a called node, and the called node is specifically which terminal node. The called node is a terminal node which needs to receive downlink data.
Step S202, determining whether the current terminal node is a called node according to the paging node indication signaling; if yes, continuing to execute step S203, triggering the random access process to enter a connected state to receive downlink data; wherein the called node is one or more of a plurality of terminal nodes.
Optionally, if the current terminal node is not the called node, the step S203 is not executed.
Each terminal node receiving the indication signaling of the paging node determines whether the terminal node is a called node or not according to the signaling, if so, the terminal node executes random access and is switched from an idle state to a Connected (Connected) state so as to receive downlink data.
Therefore, when downlink data are transmitted to the terminal nodes in the idle state, the terminal nodes can be paged in time, so that the corresponding terminal nodes receive the downlink data after triggering the access process to enter the connection state, and data loss is avoided.
In one embodiment, the terminal nodes are divided into a plurality of groups, the paging node indication signaling includes DCI and a paging message, and the DCI is used for indicating the group in which the called node is located.
Wherein the DCI is further used for scheduling a paging message so that the terminal node can receive the paging message according to the DCI. Optionally, the paging message may be carried by a Physical Downlink Control Channel (PDCCH for short).
Referring to fig. 3, fig. 3 is a flowchart illustrating a second method for indicating a vehicle-mounted short-range communication paging node, where in step S201 in fig. 2, the receiving of a paging node indication signaling sent by a management node includes:
step S2011, receiving the DCI, wherein the DCI is scrambled through a preset physical layer ID;
step S2012, descrambling the DCI by a preset physical layer ID;
the preset Physical Layer ID (Physical Layer ID is Physical Layer Identity, PID for short) is specific to all groups of terminal nodes, and each terminal node can descramble DCI by using the preset Physical Layer ID.
In step S202, the determining whether the current terminal node is a called node according to the paging node indication signaling includes:
step S2021, determining whether a group where the current terminal node is located has a called node according to the descrambled DCI;
if yes, continue to execute step S2022, receive the paging message, and determine whether the current terminal node is a called node according to the paging message.
Wherein the paging message is used for indicating which node in the group of the called node is called.
Optionally, the determining, in step S2022, whether the current terminal node is a called node according to the paging message includes: comparing the characteristic information of the current terminal node with the characteristic information of the called node, and when the characteristic information of the current terminal node is consistent with the characteristic information of the called node, the current terminal node is the called node; the characteristic information is at least one of a physical layer ID, a self identification or a non-competitive access resource, the non-competitive access resource corresponds to the terminal node one by one, and the corresponding relationship between the non-competitive access resource and the terminal node is determined by a predefined rule or other manners, which is not a limitation requirement in the present invention.
The self-identification of each terminal node is unique and can be distributed by an application layer or a management node, and the invention does not need to be limited.
The paging message may directly indicate information of the called node, that is, the physical layer ID and the self-ID. An implicit indication may also be provided by non-contention access resources.
Optionally, the group where the current terminal is located may be configured by the management node, or may be determined by other manners, where the management node and each terminal node have the same understanding for each group and the terminal nodes included in each group.
Optionally, if the current terminal node determines that the group in which the current terminal node is located does not have the called node according to step S2021, the subsequent steps are not executed.
And when the current terminal node is determined to be the called node, continuing to execute the step S203, and triggering the random access process to enter a connected state to receive downlink data.
In this embodiment, the group where the called node is located is indicated by the common DCI, so that the terminal node of the group where the called node is located continues to receive the paging message scheduled by the DCI, and whether the terminal node is the called node is determined by the paging message.
In one embodiment, the DCI is for all groups of terminal nodes, and the DCI includes a group indication field for indicating whether a called node exists in each group; in step S2021 in fig. 3, the determining whether the current terminal node is a called node according to the descrambled DCI includes: and determining whether a called node exists in the group where the current terminal node is located according to the DCI group indication domain.
Optionally, the group indication field indicates which terminal nodes are called by terminal nodes in a bitmap (bitmap) form. Further, the bitmap may include a plurality of bits (bits), each bit corresponding to a group. If a called terminal node exists in one group, the bit corresponding to the called terminal node is '1'; if the called terminal node does not exist in one group, the bit corresponding to the group is '0'. It is also possible that "1" indicates that there is no called node in a group and "0" indicates that there is a called node in a group.
Optionally, after descrambling the DCI, the current terminal determines whether a called node exists in the group where the current terminal is located according to the bitmap information in the DCI, and if so, continues to receive the paging message.
Alternatively, the bitmap length may be determined by the number of groups of terminal nodes that the protocol predefines or the management node indicates.
In an embodiment, please continue to refer to fig. 3, after receiving the DCI in step S2011, the method may further include: determining the number of groups of all terminal nodes according to the length of the group indication domain; and determining the group where the current terminal node is located according to the self identification of the current terminal node and the number of the groups.
When the bitmap length is determined by the number of the groups of the terminal nodes indicated by the management node, after the current terminal node descrambles DCI, the number of the groups of all the terminal nodes (the number of the groups for short) can be determined according to the bitmap length, and therefore, the current terminal node uniquely determines the group where the current terminal node is located according to the self identification and the number of the groups. That is, the management node divides the group in which each terminal node is located according to the self-identification of each terminal node.
For example, the number N of terminal nodes included in each group is 8, and the group number index of a terminal node is mod (the terminal node itself identifier, N), where mod () is a remainder of the parenthesized value.
In this embodiment, the identifier of the terminal node may be a physical layer ID or a preset identifier, and the management node and each terminal node understand the identifier of the terminal node consistently.
In one embodiment, please continue to refer to fig. 2, the terminal nodes are divided into a plurality of groups, the paging node indication signaling includes DCI, and the DCI is scrambled by different preset physical layer IDs to be specific to different groups of terminal nodes; step S201, the receiving of the paging node indication signaling sent by the management node includes: and receiving the DCI, descrambling the DCI through a preset physical layer ID corresponding to the group where the current terminal node is located, if descrambling is successful, continuing to execute the step S202, and determining whether the current terminal node is a called node according to the paging node indication signaling.
In this embodiment, the DCI is for a single group, and the preset physical layer IDs used for DCI of different groups are different. And each terminal node only knows the preset physical layer ID corresponding to the group where the terminal node is located, and if the DCI is descrambled successfully by the terminal node through the known preset physical layer ID, the terminal node is represented to have a called node in the group where the terminal node is located. The indication of DCI for a single group may specifically include the following two schemes:
scheme 1: the DCI further indicates to receive a bitmap message, and the determining whether the current terminal node is a called node according to the paging node indication signaling includes: and continuously receiving the bitmap message to determine whether the current terminal node is a called node according to the bitmap message, wherein the bitmap message is used for indicating whether each terminal node in a group where the called node is located is called.
Optionally, the DCI indicates scheduling information of the bitmap message, so that each terminal node of the group in which the called node is located receives the bitmap message according to the DCI scheduling.
Optionally, the bitmap message uses a bitmap to bear whether each terminal node in the group is a called node, where the bitmap includes a plurality of bits (bits), each bit represents a terminal node in the group, and each bit uses "0" or "1" to represent that the terminal node represented by the bit is called, otherwise, the terminal node represented by the bit is not called.
Optionally, the bitmap length in the bitmap message may be determined by protocol predefining, management node indication, and the number of terminal nodes included in each group.
Optionally, the DCI may also carry a correspondence between each terminal node and each bit of the bitmap in the bitmap message.
Optionally, the correspondence between each terminal node and each bit of the bitmap in the bitmap message may be defined by a protocol, or the management node specifies a bit position occupied by each terminal node in the bitmap message, or determined by the identifier (including the physical layer ID or other identifiers) of the terminal node itself.
Optionally, the bitmap message is carried by a PDCCH.
Scheme 2: the DCI comprises a bitmap field, wherein the bitmap field is used for indicating whether each terminal node in a group where a called node is located is called or not.
That is, the bitmap field is directly carried in the DCI, and the bitmap field may use a bitmap to carry whether each terminal node in the group is called, and the bitmap scheme of the bitmap field may refer to the bitmap scheme of the bitmap message in scheme 1, which is not described herein again.
Optionally, the bitmap message or bitmap field in case 1 and case 2 may also indicate the non-contention access resource of the called node to implicitly indicate the called node. Because the terminal nodes corresponding to the non-competitive access resources are not all terminal nodes, the bit number used for indication can be effectively reduced by the implicit indication scheme, and the transmission resources are saved.
In one embodiment, please refer to fig. 4, fig. 4 is a flowchart illustrating a third method for indicating a vehicle-mounted short-range communication paging node; the paging node indication signaling includes orthogonal sequences, each terminal node corresponds to a different orthogonal sequence, and the step S201 in fig. 2 of receiving the paging node indication signaling sent by the management node includes:
step S401, receiving a target orthogonal sequence sent by the management node on a preset resource;
step S202, said determining whether the current terminal node is a called node according to the paging node indication signaling includes:
step S402, if the target orthogonal sequence is the orthogonal sequence corresponding to the current node, the current node is the called node;
step S203 is executed continuously, and the random access process is triggered to enter the connected state to receive the downlink data.
The method comprises the steps that a protocol pre-configuration or management node allocates special orthogonal sequences and related transmission resources (namely preset resources) to each terminal node, if one terminal node detects the corresponding special orthogonal sequences on the preset resources, the terminal node is considered as a called node, and otherwise, the terminal node is not the called node.
An orthogonal sequence and a predetermined resource form an indication combination, for example, a certain indication combination may be represented as (X, Y), where X is the orthogonal sequence and Y is the predetermined resource. The terminal nodes correspond to the indication combinations (X, Y) one to one.
Optionally, each idle terminal node monitors an orthogonal sequence sent by the management node on a respective corresponding preset resource to determine whether the terminal node is a called node.
Optionally, the preset resource has periodicity. Further, the preset resources are periodically allocated in the time domain.
Optionally, the period of the preset resource may be determined by a protocol or configured by the management node, so that each idle terminal node may periodically listen to the orthogonal sequence sent by the management node.
In this embodiment, the management node may notify, through different orthogonal sequences, whether each terminal node is a called node.
Referring to fig. 5, fig. 5 is a flowchart illustrating a fourth method for indicating a vehicle-mounted short-range communication paging node. The method comprises the following steps:
step S501, sending a paging node indication signaling to one or more terminal nodes, so that each terminal node determines whether the terminal node is a called node according to the paging node indication signaling, and when a terminal node determines that the terminal node is the called node, triggering a random access process to enter a connected state to receive downlink data;
the paging node indication signaling indicates whether each terminal node is a called node, and the called node is one or more of a plurality of terminal nodes.
In one embodiment, the terminal nodes are divided into a plurality of groups, the paging node indication signaling includes DCI and a paging message, and before the step S501 in fig. 5 of sending the paging node indication signaling to one or more terminal nodes, the method further includes: generating the DCI, wherein the DCI is used for indicating a group where a called node is located; scrambling the DCI by a preset physical layer ID;
step S501, sending a paging node indication signaling to one or more terminal nodes, includes: sending the DCI so that each terminal node descrambles the DCI through a preset physical layer ID after receiving the DCI; and generating a paging message and sending the paging message, so that the terminal node of the group where the called node is positioned receives the paging message and determines whether the terminal node is the called node.
In one embodiment, the DCI is for all groups of terminal nodes, the DCI includes a group indication field, and the generating the DCI includes: and generating the group indication domain of the DCI according to whether the called node exists in each group.
In one embodiment, the generating the DCI further comprises: and determining the length of the group indication domain according to the number of the groups of all the terminal nodes, so that the terminal nodes can determine the groups in which the terminal nodes are located according to the self identification and the number of the groups.
In one embodiment, the paging message indicates the feature information of the called node, so that the terminal node compares whether the feature information of the terminal node is consistent with the feature information of the called node or not to determine whether the terminal node is the called node or not; the characteristic information is at least one of a physical layer ID, a self identification or non-competitive access resource, the non-competitive access resource is in one-to-one correspondence with the terminal node, and the correspondence between the non-competitive access resource and the terminal node is determined through a predefined rule.
In one embodiment, the dividing the terminal nodes into a plurality of groups, where the paging node indication signaling includes DCI, and before the sending the paging node indication signaling to one or more terminal nodes in step S501, the method further includes: generating the DCI; scrambling the DCI with different preset physical layer IDs for different groups of terminal nodes; and sending the scrambled DCI so that the terminal node descrambles the DCI according to a preset physical layer ID corresponding to the group where the terminal node is located.
In one embodiment, the DCI is further configured to instruct a terminal node to receive a bitmap message, and after the sending the scrambled DCI, the method further includes: generating the bitmap message, wherein the bitmap message is used for indicating whether each terminal node in a group where the called node is located is called or not; and sending the bitmap message, so that the terminal node receiving the bitmap message determines whether the terminal node is a called node or not according to the bitmap message.
In one embodiment, the DCI includes a bitmap field, and the generating the DCI further includes: and generating the bitmap domain of the DCI according to whether each terminal node in the group where the called node is positioned is called.
In one embodiment, the paging node indication signaling is an orthogonal sequence, and each terminal node corresponds to a different orthogonal sequence; before the sending the paging node indication signaling to the one or more terminal nodes, the method further includes: determining a target orthogonal sequence corresponding to the called node; the sending paging node indication signaling to one or more terminal nodes comprises: sending the target orthogonal sequence on preset resources so that each terminal node receives the target orthogonal sequence on the preset resources; after each terminal node receives the target orthogonal sequence, if the target orthogonal sequence is judged to be the orthogonal sequence corresponding to the terminal node, the terminal node can be judged to be the called node.
Optionally, the preset resource has periodicity.
More contents of the working principle and the working mode of the indication method of the vehicle-mounted short-distance communication paging node shown in fig. 5 can refer to the related description about the management terminal in the methods described in fig. 2 to fig. 4, and are not described again here.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an indicating apparatus of a vehicle-mounted short-range communication paging node, where the indicating apparatus 60 of the vehicle-mounted short-range communication paging node includes:
a paging node indication signaling receiving module 601, configured to receive a paging node indication signaling sent by a management node, where the paging node indication signaling indicates whether each terminal node is a called node;
a called node determining module 602, configured to determine whether a current terminal node is a called node according to the paging node indication signaling, and if the current terminal node is the called node, trigger a random access process to enter a connected state to receive downlink data;
wherein the called node is one or more of a plurality of terminal nodes.
More contents of the operation principle and the operation mode of the indicating device 60 of the vehicle-mounted short-range communication paging node shown in fig. 6 can refer to the related descriptions in the methods described in fig. 2 to fig. 4, and are not described again here.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an indicating apparatus of a vehicle-mounted short-range communication paging node, where the indicating apparatus 70 of the vehicle-mounted short-range communication paging node includes:
a paging node indication signaling sending module 701, configured to send a paging node indication signaling to one or more terminal nodes, so that each terminal node determines whether itself is a called node according to the paging node indication signaling, and when a terminal node determines itself to be a called node, triggers a random access process to enter a connected state to receive downlink data;
the paging node indication signaling indicates whether each terminal node is a called node, and the called node is one or more of a plurality of terminal nodes.
More contents of the operation principle and the operation mode of the indicating device 70 of the vehicle-mounted short-range communication paging node shown in fig. 7 can refer to the related description in the method described in fig. 5, and are not repeated here.
Embodiments of the present invention further provide a storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the method described in fig. 2 to 4 or the steps of the method shown in fig. 5. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.
Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and 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 in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile 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 and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).
An embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the method shown in fig. 2 to 4 or the method shown in fig. 5 when running the computer program. The computer device includes, but is not limited to, a mobile phone, a computer, a tablet computer, a server, or a server cluster. The terminal is also a management node and/or a terminal node.
Specifically, a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal device), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.
The "plurality" appearing in the embodiments of the present application means two or more.
The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present application, and do not constitute any limitation to the embodiments of the present application.
The term "connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (24)
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