CN110505673B - Wireless transmission method and device in high-speed mobile environment - Google Patents
Wireless transmission method and device in high-speed mobile environment Download PDFInfo
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- CN110505673B CN110505673B CN201910797234.6A CN201910797234A CN110505673B CN 110505673 B CN110505673 B CN 110505673B CN 201910797234 A CN201910797234 A CN 201910797234A CN 110505673 B CN110505673 B CN 110505673B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The invention discloses a wireless transmission method and a wireless transmission device in a high-speed mobile environment. As an embodiment, in step one, the first node sends the first information to the second node, and the second node sends the second information to the third node; in step two, the third node sends the third information to the second node, and the second node sends the fourth information to the first node. Wherein the first node and the second node are user equipment respectively. The first information comprises an access request, the second information comprises an identification of the first node, the third information comprises an access response, and the fourth information comprises said access response. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The invention can effectively reduce the call drop caused by switching, and is particularly suitable for high-speed mobile communication.
Description
The present application is a divisional application of the following original applications:
application date of the original application: 10 days 08 month 2015
- -application number of the original application: 201510487661.6
The invention of the original application is named: wireless transmission method and device in high-speed mobile environment
Technical Field
The present invention relates to a transmission scheme of a radio signal in a radio communication system, and more particularly, to a radio transmission method and apparatus for handover.
Background
A high-speed moving scene represented by Vehicle-to-outside (V2X-Vehicle to X) becomes a research hotspot of next-generation mobile communication. One of the serious challenges faced by conventional cellular networks in high-speed mobile scenarios is: the high call drop rate that the terminal faces during handover. To solve this problem, techniques such as soft handover, baton handover, etc. are applied to some handheld terminals. However, the above-mentioned technology cannot be adopted by LTE (Long Term Evolution) due to its high complexity.
Disclosure of Invention
The present invention provides a solution to the above problems. It should be noted that, without conflict, the embodiments and features in the embodiments in the first node of the present application may be applied to the second node and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.
The inventor finds out through research that: for Vehicle-to-Vehicle (V2V-Vehicle to Vehicle) communication, one possible scenario is that two vehicles traveling in opposite directions are likely to be attached to different cells. Whereas the channel quality of the wireless channel between the two vehicles traveling in opposite directions may be better than the wireless channel between the moving vehicle to the fixed base station.
According to the above research, the present invention discloses a method of wireless communication, which includes the following steps:
step A. the first node sends the first information to the second node, which sends the second information to the third node
Step b. the third node sends the third information to the second node, which sends the fourth information to the first node; or the third node sends the third information to the fourth node, and the fourth node sends the fourth information to the first node.
Wherein the first node and the second node are user equipment respectively. The first information comprises at least one of { access request, identity of first cell, identity of second cell, identity of first node, identity of second node }, the second information comprises at least one of { said access request, identity of first node, identity of second cell }, the third information comprises at least one of { access response, identity of first node, identity of second cell }, the fourth information comprises at least one of { said access response, identity of first node, identity of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
In a common handover procedure, when a terminal monitors that the channel quality of a target cell exceeds the channel quality of a current serving cell (i.e., the terminal is located at the edge of the serving cell), division handover is performed by feeding back corresponding measurement information. However, for the in-vehicle device, the terminal moves from the edge of the serving cell to the outside of the coverage of the serving cell within a short time, and if the handover cannot be completed within the short time, the terminal is at risk of call drop.
In the above method, the first node can trigger a handover operation (possibly not yet in the coverage of the first cell) -relaying through the second node when in a relatively central position of the second cell. The method allows the first node to be switched from the second cell to the first cell in a longer time, and reduces the call drop rate.
As an embodiment, the first information further includes at least one of { a moving speed of the first node, a moving direction of the first node }. As a sub-embodiment, the direction of movement of the first node is one of { approaching the second node, away from the second node, and at a constant distance from the second node }.
As an embodiment, the first information further comprises a channel quality parameter determined by the first node from at least one of { measurement on the first cell, measurement on the second cell }. As a sub-embodiment, the first information includes channel Quality parameters determined by the first node according to measurements on the first cell, the channel Quality parameters including at least one of { RSRP (Reference Signal Receiving Power, Reference Signal Receiving energy), RSRQ (Reference Signal Receiving Quality) }. As a sub-embodiment, the first information further comprises at least one of { a ratio of a first RSRP to a second RSRP, a ratio of a first RSRQ to a second RSRQ }, the first RSRP and the first RSRQ being determined by the first node from measurements on the first cell, the second RSRP and the second RSRQ being determined by the first node from measurements on the second cell.
As an embodiment, the third node and the fourth node are each a base station equipped with an RSU (Roadside Unit). As an embodiment of the RSU, the RSU is a Transportation Infrastructure (Transportation Infrastructure) that transmits a speed indication.
As an embodiment, the information is transmitted in multiple (air interface) subframes. As an embodiment, the information is transmitted in one subframe.
As an example, the third node sends the third information to the fourth node over the X2 interface. As an embodiment, the third node sends the third information to the fourth node over the optical fiber.
As an embodiment, the access request is indicated by at least one of { information bit, Zadoff-Chu sequence, pseudo random sequence }.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
step c. the fourth node sends the fifth information to the third node.
The fifth Information includes at least one of { SN STATUS TRANSFER message (message), E-RAB parameters (attributes), RRC context IE (Information Element), buffered packet data, packet data being transmitted }.
As an example, the fourth node sends the fifth information to the third node over the X2 interface. As an embodiment, the fourth node sends the fifth information to the third node through the optical fiber direct channel.
The fifth information is information necessary for the first cell (via the relay of the second node) and the first node to establish a communication link.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
step d. transmitting Packet Data (Packet Data) between the first node and the third node via the relay of the second node.
Wherein the access response is an allowed access.
In step D, the first node sends the given packet data to the second node, and the second node sends the given packet data to the third node after correctly receiving the given packet data.
In step D, the third node sends the packet data to the second node, and the second node sends the packet data to the first node after receiving the packet data correctly.
Compared with the traditional switching process, the first node is in the coverage of the service cell, and the data transmission of the packet can be maintained with the target cell.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
step e. the first node and the third node establish a RRC (Radio Resource Control) connection.
As an embodiment, the step E adopts an LTE scheme, that is, the specific implementation is as follows: the first node sends an RRCConnectionRequest message to the third node. The third node sends an RRCConnectionSetup message to the first node and the first node sends an RRCConnectionSetupComplete message to the third node, or the third node sends an rrcconnectionseject message to the first node. As a sub-embodiment, the first node maintains a wireless connection with the second node until it receives the RRCConnectionSetupComplete message.
As an embodiment, the first node performs step E after moving into the coverage of the first cell.
As one example, the step E occurs after the step D.
As an embodiment, the step E includes the steps of:
-step e1. the first node sends an uplink synchronization signal on the first cell, and the third node sends a timing adjustment signaling and an uplink scheduling (UL Grant) to the first node.
As an embodiment, the step E includes the steps of:
step e2. the first node sends the packet data to the third node, or the third node sends the packet data to the first node.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step f. the first node receives an RRCConnectionReconfiguration message sent by the second cell, said RRCConnectionReconfiguration message comprising mobilityControlInfo.
As an embodiment, said step F follows said step D. As an example, said step F follows said step a. The essence of the two embodiments is that: after the first node and the third node establish contact (via the relay), the fourth node again interrupts communication with the first node. This can significantly reduce the dropped call rate. Unlike soft handover, the first node and the third node are now in contact relayed through the second node.
As an example, the targetphyscellld in the mobilityControlInfo is the physical cell id (physcellld) of the first cell.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
step g. the first node sends the sixth information to the second node, or the third node sends the sixth information to the second node.
Wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
As an embodiment, the step G follows the step E. The essence of the embodiment is as follows: in the process of establishing RRC connection with the third node, the first node still keeps contact with the third node through the relay of the second node, and the robustness is improved.
In step G, the second node interrupts the wireless transmission with the first node.
As an embodiment, the step G further includes the steps of:
step G1. the second node sends a sixth message to the first node.
And the third node sends sixth information to the second node, wherein the sixth information indicates that the wireless connection between the first node and the second node is interrupted.
The invention discloses a method in a first node supporting wireless communication, which comprises the following steps:
-step a. sending the first information. The target recipient of the first information comprises a second node
-step b. The sender of the fourth information is the second node, or the sender of the fourth information is the fourth node.
Wherein the first node and the second node are user equipment respectively. The first information includes at least one of { access request, identification of first cell, identification of second cell, identification of first node, identification of second node }, and the fourth information includes at least one of { access response, identification of first node, identification of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
As an embodiment, the spare1 or the spare2 in the access request packet establishmencause.
As an embodiment, the access response includes a rrc-TransactionIdentifier IE (Information Element).
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step d. and the third node transmitting the packet data, the packet data being relayed by the second node.
Wherein the access response is an allowed access.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step e. establishing an RRC connection with the third node.
As an embodiment, the step E includes the steps of:
-step e1. the first node sends an uplink synchronization signal on the first cell and receives timing adjustment signalling and uplink scheduling signalling on the first cell.
As an embodiment, the step E includes the steps of:
-step e2. transmitting packet data on air interface resources of the first cell, or receiving packet data on air interface resources of the first cell.
As an embodiment, the step E includes the steps of:
-step e2. receiving the RRCConnectionSetup message on the air interface resource of the first cell.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-receiving an RRCConnectionReconfiguration message sent by the second cell, the RRCConnectionReconfiguration message comprising mobilityControlInfo.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step g.
Wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
The invention discloses a method in a second node supporting wireless communication, which comprises at least the following step A of { step A, step B }:
-step a. receiving the first information, sending the second information. The sender of the first information is a first node and the target recipient of the second information comprises a third node
-step b. receiving the third information, sending the fourth information. The sender of the third information is a third node and the target recipient of the fourth information comprises the first node.
Wherein the first node and the second node are user equipment respectively. The first information comprises at least one of { access request, identity of first cell, identity of second cell, identity of first node, identity of second node }, the second information comprises at least one of { said access request, identity of first node, identity of second cell }, the third information comprises at least one of { access response, identity of first node, identity of second cell }, the fourth information comprises at least one of { said access response, identity of first node, identity of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step d. relaying packet data between the first node and the third node.
Wherein the access response is an allowed access.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step g. The sender of the sixth information is the first node, or the sender of the sixth information is the third node.
Wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
The invention discloses a method in a third node supporting wireless communication, which comprises the following steps:
-step a. receiving second information. The sender of the second information being the second node
-step b. The target recipient of the third information comprises the second node, or the target recipient of the third information comprises the fourth node.
Wherein the second information comprises at least one of { access request, identification of the first node, identification of the second cell }, and the first node and the second node are user equipment respectively. The third information includes at least one of { access response, identification of the first node, identification of the second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step c. receiving fifth information, the sender of which is a fourth node.
The fifth Information includes at least one of { SN STATUS TRANSFER message (message), E-RAB parameters (attributes), RRC context IE (Information Element), buffered packet data, packet data being transmitted }.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step d. relaying through the second node, and transmitting the packet data with the first node.
Wherein the access response is an allowed access.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step e. establishing an RRC connection with the first node.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step g. The target recipient of the sixth information comprises the second node.
Wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
The invention discloses a method in a fourth node supporting wireless communication, which comprises the following steps:
-step c. The receiver of the fifth information includes a third node.
-sending an RRCConnectionReconfiguration message, said RRCConnectionReconfiguration message comprising mobilityControlInfo. The target recipient of the RRCConnectionReconfiguration message comprises the first node.
The fifth Information includes at least one of { SN STATUS TRANSFER message (message), E-RAB parameters (attributes), RRC context IE (Information Element), buffered packet data, packet data being transmitted }. The first node is a user equipment, the third node is a network device, the second cell is a serving cell of the first node, and the second cell is maintained by a fourth node.
In the conventional handover, the above step C should occur after the above step F, whereas in the present invention, the step C occurs before the above step F because the fifth information can also be used for relay transmission from the first node to the third node.
As an embodiment, the fourth node still maintains the RRC connection with the first node after said step C (before said step F).
Specifically, according to an aspect of the present invention, before the step C, the following step is further included:
-step b. receiving the third information, sending the fourth information. The sender of the third information is a third node and the target recipient of the fourth information comprises the first node.
Wherein the third information comprises at least one of { access response, identity of the first node, identity of the second cell }, and the fourth information comprises at least one of { said access response, identity of the first node, identity of the second cell }. The access response includes an allowance of access or a denial of access.
The invention discloses a device for a first node of wireless communication, which is characterized by comprising the following modules:
a first module: for transmitting the first information. The target recipient of the first information comprises a second node
A second module: for receiving the fourth information. The sender of the fourth information is the second node, or the sender of the fourth information is the fourth node.
Wherein the first node and the second node are user equipment respectively. The first information includes at least one of { access request, identification of first cell, identification of second cell, identification of first node, identification of second node }, and the fourth information includes at least one of { access response, identification of first node, identification of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
The invention discloses a device of a second node for wireless communication, which is characterized by comprising the following modules:
a first module: the first information is received, and the second information is sent. The sender of the first information is a first node and the target recipient of the second information comprises a third node
A second module: used for receiving the third information and sending the fourth information. The sender of the third information is a third node and the target recipient of the fourth information comprises the first node.
Wherein the first node and the second node are user equipment respectively. The first information comprises at least one of { access request, identity of first cell, identity of second cell, identity of first node, identity of second node }, the second information comprises at least one of { said access request, identity of first node, identity of second cell }, the third information comprises at least one of { access response, identity of first node, identity of second cell }, the fourth information comprises at least one of { said access response, identity of first node, identity of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
The invention discloses equipment of a third node for wireless communication, which is characterized by comprising the following modules:
a first module: for receiving the second information. The sender of the second information being the second node
A second module: for transmitting the third information. The target recipient of the third information comprises the second node, or the target recipient of the third information comprises the fourth node.
Wherein the second information comprises at least one of { access request, identification of the first node, identification of the second cell }, and the first node and the second node are user equipment respectively. The third information includes at least one of { access response, identification of the first node, identification of the second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
The invention discloses equipment of a fourth node for wireless communication, which is characterized by comprising the following modules:
a first module: for transmitting the fifth information. The receiver of the fifth information includes a third node.
A second module: for sending an RRCConnectionReconfiguration message, the RRCConnectionReconfiguration message including mobilityControlInfo. The target recipient of the RRCConnectionReconfiguration message comprises the first node.
The fifth Information includes at least one of { SN STATUS TRANSFER message (message), E-RAB parameters (attributes), RRC context IE (Information Element), buffered packet data, packet data being transmitted }. The first node is a user equipment, the third node is a network device, the second cell is a serving cell of the first node, and the second cell is maintained by a fourth node.
Compared with the prior art, the invention has the following technical advantages:
prolong the switching time, improve the switching success rate and reduce the call drop rate.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of a first node requesting access to a third node through a relay according to one embodiment of the invention;
fig. 2 shows a flow chart of downlink information transmission by the first node and the third node through the relay of the second node according to an embodiment of the invention;
fig. 3 shows a flow diagram of a first node and a third node establishing an RRC connection according to an embodiment of the invention;
FIG. 4 shows a flow diagram of a third node rejecting a first node to establish an RRC connection, according to one embodiment of the present invention;
fig. 5 shows a block diagram of a processing means in a first node according to an embodiment of the invention;
fig. 6 shows a block diagram of a processing means in a second node according to an embodiment of the invention;
fig. 7 shows a block diagram of a processing means in a third node according to an embodiment of the invention;
FIG. 8 shows a block diagram of a processing device in a fourth node according to an embodiment of the invention;
Detailed Description
The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
Example 1
Embodiment 1 illustrates a flowchart in which a first node requests access to a third node through a relay, as shown in fig. 1. In FIG. 1, the step in block F1 appears and the step in block F2 does not appear, or the step in block F2 appears and the step in block F1 does not appear.
For theFirst nodeThe first information is transmitted in step S11, and the fourth information is received in step S12.
For theSecond nodeThe first information is received in step S21, the second information is transmitted in step S22, the third information is received in step S23, and the fourth information is transmitted in step S24.
For theThird nodeThe second information is received in step S31, and the third information is transmitted in step S32.
For theFourth nodeThe third information is received in step S41, and the fourth information is transmitted in step S42.
In embodiment 1, the first node and the second node are user equipments, respectively. The third node and the fourth node are each network devices. The first information comprises at least one of { access request, identity of first cell, identity of second cell, identity of first node, identity of second node }, the second information comprises at least one of { said access request, identity of first node, identity of second cell }, the third information comprises at least one of { access response, identity of first node, identity of second cell }, the fourth information comprises at least one of { said access response, identity of first node, identity of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
As sub-embodiment 1 of embodiment 1, the Identifier of the first Cell and the Identifier of the second Cell are a PCI (Physical Cell Identifier) of the first Cell and a PCI of the second Cell, respectively.
As sub-embodiment 2 of embodiment 1, the identity of the first node is an RNTI (Radio Network Temporary identity) allocated to the first node by the second cell.
As a sub-embodiment 3 of embodiment 1, the Identity of the first node is initialout-Identity.
As a sub-embodiment 4 of embodiment 1, the Identity of the first node is an IMEI (International Mobile Equipment Identity) of the first node.
As a sub-embodiment 5 of embodiment 1, the identity of the second node is an RNTI assigned to the second node.
As a sub-embodiment 6 of embodiment 1, the identity of the second node is the end Group identity (Group destination ID, section 5.4.3.1.1 of the detailed explanation reference TS 36.212) assigned to the second node.
As sub embodiment 7 of embodiment 1, the access request is indicated by a spare1 status or a spare2 status reserved in the establishmentause.
As a sub-embodiment 8 of embodiment 1, the access request indicates that the first node accesses through a relay.
As sub-embodiment 9 of embodiment 1, the first information includes { access request, identification of the second cell, identification of the first node }.
As sub-embodiment 10 of embodiment 1, the second information comprises { said access request, an identification of the first node, an identification of the second cell }.
Example 2
Embodiment 2 illustrates a flowchart of downlink information transmission performed by a first cell maintained by a first node and a third node through relay of a second node, as shown in fig. 2. Among them, the step in the block F3 is an optional step.
For theFirst nodeThe packet data is received in step S111 and an RRC connection with the second cell (maintained by the fourth node) is maintained in step S110.
For theSecond nodeThe packet data is relayed (i.e., received before forwarded) in step S121.
For theThird nodeThe fifth information is received in step S131, and the packet data is transmitted in step S132.
For theFourth nodeThe fifth information is transmitted in step S141, and the RRC connection of the second cell and the first node is maintained in step S140.
In embodiment 2, the fifth Information includes at least one of { SN STATUS TRANSFER message (message), E-RAB parameters (attributes), RRC context IE (Information Element), buffered packet data, packet data being transmitted }.
As sub-embodiment 1 of embodiment 2, the packet data includes at least one of { data plane data, control plane data }.
As sub-embodiment 2 of embodiment 2, for the first node, the maintaining the RRC connection includes at least one of { receive downlink synchronization signal, transmit uplink synchronization signal, receive downlink packet data, transmit uplink packet data }. For the fourth node, the maintaining the RRC connection includes at least one of { transmit downlink synchronization signal, receive uplink synchronization signal, transmit downlink packet data, receive uplink packet data }.
Example 3
Embodiment 3 illustrates a flowchart for establishing an RRC connection between the first node and the third node, as shown in fig. 3. Wherein the steps in block F4 and block F5, respectively, are optional.
For the fourth node, an RRCConnectionReconfiguration message is transmitted in step S240.
For the first node, an RRCConnectionReconfiguration message is received in step S210, an RRCConnectionRequest message is transmitted in step S211, an RRCConnectionSetup message is received in step S212, and an RRCConnectionComplete message is transmitted in step S213.
For the third node, an RRCConnectionRequest message is received in step S231, an RRCConnectionSetup message is transmitted in step S232, and an RRCConnectionComplete message is received in step S233.
In embodiment 3, the RRCConnectionReconfiguration message includes mobilityControlInfo, where targetphyscellld in the mobilityControlInfo is a PCI of a first cell, the first cell is a serving cell of a second node, and the first cell is maintained by a third node.
As sub-embodiment 1 of embodiment 3, the third node transmits the sixth information in step S234, the second node receives the sixth information in step S221, and transmits the interrupt signaling in step S222. The first node receives the interrupt signaling in step S214. Wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted. The interrupt signaling releases the wireless connection of the second node to the first node. As an embodiment of the interrupt signaling, the interrupt signaling includes (in the RRCConnectionRelease message) releasecoase IE, and the releasecoase IE in the interrupt signaling is set to other or spare 1.
As sub-embodiment 2 of embodiment 3, for the first node, a wireless connection with the second node is maintained before step S214. For the second node, a wireless connection with the first node is maintained prior to step S222. Maintaining a wireless connection with a given node includes at least one of { maintaining synchronization with the given node, receiving a wireless signal from the given node, transmitting a wireless signal for the given node }.
Example 4
Embodiment 4 illustrates a flowchart in which the third node rejects the first node to establish the RRC connection, as shown in fig. 4.
The first node transmits an RRCConnectionRequest message in step S311, receives an RRCConnectionReject message in step S312, and transmits upstream packet data in step S313.
The third node receives the RRCConnectionRequest message in step S331, transmits the RRCConnectionReject message in step S332, and receives the upstream packet data in step S333.
The second node receives and forwards the upstream packet data in step S321.
As sub embodiment 1 of embodiment 4, the first node and the second node always maintain wireless connection in embodiment 4. Even if the third node refuses the request of the first node for establishing the RRC connection, the third node and the first node can keep in contact through the relay of the second node, and call drop is avoided.
Example 5
Embodiment 5 illustrates a block diagram of a processing apparatus in a first node, as shown in fig. 5. In fig. 5, the processing apparatus 100 is mainly composed of a transmitting module 101 and a receiving module 102.
The sending module 101 is configured to send first information. The target recipient of the first information comprises a second node
The receiving module 102 is configured to receive the fourth information. The sender of the fourth information is the second node, or the sender of the fourth information is the fourth node.
In embodiment 5, the first node and the second node are user equipments, respectively. The first information includes at least one of { access request, identification of first cell, identification of second cell, identification of first node, identification of second node }, and the fourth information includes at least one of { access response, identification of first node, identification of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
As sub-embodiment 1 of embodiment 5, the target recipient of the first information complies with at least one of:
identification of the target recipient of the first information is used for scrambling of the binary bits corresponding to the first information
Identification of the target receiver of the first information for generation of a demodulation RS (Reference Signal) sequence of the physical layer channel corresponding to the first information
The physical layer scheduling signaling corresponding to the first information includes an identifier of a target recipient of the first information, or includes a Group destination ID (Group destination ID) to which the target recipient of the first information belongs
The transmission time of the first information is determined based on the timing of the target recipient of the first information.
As sub embodiment 2 of embodiment 5, the sending module 101 is further configured to send an { RRCConnectionRequest, RRCConnectionComplete } message, and the receiving module 102 is further configured to receive an RRCConnectionSetup message.
As sub-embodiment 3 of embodiment 5, the sending module 101 is further configured to send sixth information to the second node. Wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
As sub-embodiment 4 of embodiment 5, the receiving module 102 is further configured to receive sixth information sent by the second node or the third node, where the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
Example 6
Embodiment 6 illustrates a block diagram of a processing apparatus in the second node, as shown in fig. 6. In fig. 6, the processing device 200 is mainly composed of a receiving module 201 and a transmitting module 202.
The receiving module 201 is configured to receive the first information and receive the third information. The sending module 202 is configured to send the second information and send the fourth information.
The sender of the first message is a first node and the intended recipient of the second message comprises a third node. The sender of the third information is a third node and the target recipient of the fourth information comprises the first node.
In embodiment 6, the first node and the second node are user equipments, respectively. The first information comprises at least one of { access request, identity of first cell, identity of second cell, identity of first node, identity of second node }, the second information comprises at least one of { said access request, identity of first node, identity of second cell }, the third information comprises at least one of { access response, identity of first node, identity of second cell }, the fourth information comprises at least one of { said access response, identity of first node, identity of second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
As sub embodiment 1 of embodiment 6, the receiving module 201 is further configured to receive packet data of the first node and the third node. Wherein the access response is an allowed access.
As sub-embodiment 2 of embodiment 6, the sending module 202 is also used for forwarding the packet data in sub-embodiment 1 of embodiment 6.
Example 7
Embodiment 7 illustrates a block diagram of a processing apparatus in the third node, as shown in fig. 7. In fig. 7, the processing apparatus 300 mainly comprises a receiving module 301 and a transmitting module 302.
The receiving module 301 is configured to receive the second information. The sender of the second information being the second node
The sending module 302 is configured to send the third information. The target recipient of the third information comprises the second node, or the target recipient of the third information comprises the fourth node.
In embodiment 7, the second information includes at least one of { access request, identity of the first node, identity of the second cell }, and the first node and the second node are user equipments, respectively. The third information includes at least one of { access response, identification of the first node, identification of the second cell }. The first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node. The access response includes an allowance of access or a denial of access.
As sub-embodiment 1 of embodiment 7, the receiving module 301 is further configured to receive fifth information through an X2 interface, where a sender of the fifth information is a fourth node. Wherein the fifth information includes at least one of { SN STATUS TRANSFER message, E-RAB parameter, RRC context IE, buffered packet data, packet data being transmitted }.
As sub-embodiment 2 of embodiment 7, the receiving module 301 is further configured to receive packet data relayed by the second node with the source being the first node. Wherein the access response is an allowed access.
As sub-embodiment 3 of embodiment 7, the transmitting module 302 is further configured to transmit packet data relayed by the second node while the sink is the first node. Wherein the access response is an allowed access.
As sub-embodiment 3 of embodiment 7, the sending module 302 is further configured to send sixth information. The target recipient of the sixth information includes at least one of { the first node, the second node }. Wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
Example 8
Embodiment 8 is a block diagram illustrating a configuration of a processing apparatus in the fourth node, as shown in fig. 8. In fig. 8, the processing device 400 mainly includes a receiving module 401 and a transmitting module 402.
The receiving module 401 is configured to receive the third information. The sending module 402 is configured to send the fourth information, the fifth information and the RRCConnectionReconfiguration message.
In embodiment 8, the sender of the third information is the third node, and the target recipient of the fourth information includes the first node. The receiver of the fifth information includes a third node. The third information comprises at least one of { access response, identity of the first node, identity of the second cell }, and the fourth information comprises at least one of { said access response, identity of the first node, identity of the second cell }. The access response includes an allowance of access or a denial of access. The RRCConnectionReconfiguration message includes mobilityControlInfo. The target recipient of the RRCConnectionReconfiguration message comprises the first node. The fifth information includes at least one of { SN STATUS TRANSFER message, E-RAB parameter, RRC context IE, buffered packet data, packet data being transmitted }. The first node is a user equipment, the third node is a network device, the second cell is a serving cell of the first node, and the second cell is maintained by a fourth node.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The User Equipment (UE) or the terminal in the present invention includes but is not limited to a mobile phone, a vehicle-mounted communication device, a tablet computer, a notebook computer, a network card, and other wireless communication devices. The network device or base station in the present invention includes, but is not limited to, a RSU, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices. The embodiment of the present invention is mainly based on the LTE system, but the application scope of the present invention also includes (but is not limited to) any wireless communication system supporting digital modulation (e.g. 3G, Wifi, Wimax, future 5G communication system, etc.).
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (9)
1. A first node for wireless communication, comprising:
a first module: for transmitting first information; the target recipient of the first information comprises a second node;
a second module: for receiving fourth information; the sender of the fourth information is the second node, or the sender of the fourth information is the fourth node;
the first node and the second node are user equipment respectively; the first information comprises an access request, and the fourth information comprises an access response; the first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node; the access response comprises permission of access or rejection of access; when the access response is access permission, the first node and the third node transmit packet data, and the packet data is relayed by the second node.
2. The first node of claim 1, wherein:
the second module receives an RRCConnectionReconfiguration message transmitted by a second cell, the RRCConnectionReconfiguration message including mobilityControlInfo.
3. The first node according to claim 1 or 2, characterized by:
the first module sends sixth information to the second node;
wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
4. A second node for wireless communication, comprising:
a first module: the system is used for receiving first information and sending second information; the sender of the first information is a first node, and the target receiver of the second information comprises a third node;
a second module: the device is used for receiving the third information and sending the fourth information; the sender of the third information is a third node, and the target recipient of the fourth information comprises the first node;
the first node and the second node are user equipment respectively; the first information comprises an access request, the second information comprises the access request, the third information comprises an access response, and the fourth information comprises the access response; the first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node; the access response comprises permission of access or rejection of access; when the access response is access permission, the first node and the third node transmit packet data, and the packet data is relayed by the second node.
5. The second node of claim 4, wherein:
the first module receives sixth information; the sender of the sixth information is the first node, or the sender of the sixth information is the third node;
wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
6. A third node for wireless communication, comprising:
a first module: for receiving second information; the sender of the second information is the second node;
a second module: for transmitting the third information; the target recipient of the third information comprises the second node, or the target recipient of the third information comprises the fourth node;
the second information comprises an access request, and the first node and the second node are user equipment respectively; the third information comprises an access response; the first cell is a serving cell of the second node, the second cell is a serving cell of the first node, the first cell is maintained by the third node, and the second cell is maintained by the fourth node; the access response comprises permission of access or rejection of access; when the access response is access permission, the first node and the third node transmit packet data, and the packet data is relayed by the second node.
7. The third node of claim 6, wherein:
the first module receives fifth information, and a sender of the fifth information is a fourth node;
the third node sends third information to the fourth node, and the fourth node sends fourth information to the first node; the fifth information includes at least one of { SN STATUS TRANSFER message, E-RAB parameter, RRC context IE, buffered packet data, packet data being transmitted }.
8. The third node of claim 6, wherein:
the second module establishes an RRC connection with the first node.
9. The third node of claim 6, wherein:
the first module sends sixth information; the target recipient of the sixth information comprises the second node;
wherein the sixth information indicates that the first node and the third node have established an RRC connection, or the sixth information indicates that the radio connection between the first node and the second node is interrupted.
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| CN108512628A (en) * | 2017-02-24 | 2018-09-07 | 上海朗帛通信技术有限公司 | A kind of method and apparatus for higher layer transmission being used in base station, UE |
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| CN106455005A (en) | 2017-02-22 |
| CN106455005B (en) | 2019-09-13 |
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