Method for switching communication connection mode, communication system, base station, transmitter and receiver
First Claim
1. A method for switching communication connection modes, adapted to a communication system comprising a transmitter, a receiver and at least one base station, and the method comprising:
- when the at least one base station or a core network entity determines that a communication mode between the transmitter and the receiver requires to be switched from a cellular communication mode to a device-to-device communication mode, sending a control message by the at least one base station to the transmitter;
stopping transmitting, by the transmitter, at least one first packet to the at least one base station in response to the control message;
buffering, by the at least one base station, a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets, wherein the transmission-unfinished packets are packets have been received, by the at least one base station, from the transmitter but have not been transmitted, by the at least one base station, to the receiver in the cellular communication mode, wherein each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets; and
receiving, by the receiver, the transmission-unfinished packets and the transmission-unfinished packet statuses related to the transmission-unfinished packets forwarded by the at least one base station before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the cellular communication mode to the device-to-device communication mode.
1 Assignment
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Accused Products
Abstract
A method for switching communication connection modes, a communication system, a base station, a transmitter and a receiver are provided. The method includes the following steps. Firstly, when a base station or a core network entity determines that a communication mode between a transmitter and a receiver should be switched from a cellular communication mode to a device-to-device communication mode, the base station sends a control message to the transmitter. Next, the transmitter stops transmitting at least one first packet to the base station in response to the control message. Afterwards, the receiver receives at least one transmission-unfinished packet and a transmission-unfinished packet status related to the at least one transmission-unfinished packet forwarded by the base station.
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Citations
53 Claims
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1. A method for switching communication connection modes, adapted to a communication system comprising a transmitter, a receiver and at least one base station, and the method comprising:
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when the at least one base station or a core network entity determines that a communication mode between the transmitter and the receiver requires to be switched from a cellular communication mode to a device-to-device communication mode, sending a control message by the at least one base station to the transmitter; stopping transmitting, by the transmitter, at least one first packet to the at least one base station in response to the control message; buffering, by the at least one base station, a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets, wherein the transmission-unfinished packets are packets have been received, by the at least one base station, from the transmitter but have not been transmitted, by the at least one base station, to the receiver in the cellular communication mode, wherein each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets; and receiving, by the receiver, the transmission-unfinished packets and the transmission-unfinished packet statuses related to the transmission-unfinished packets forwarded by the at least one base station before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the cellular communication mode to the device-to-device communication mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communication system, comprising:
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a transmitter; a receiver; and at least one base station, wherein when the at least one base station or a core network entity determines that a communication mode between the transmitter and the receiver requires to be switched from a cellular communication mode to a device-to-device communication mode, the at least one base station sends a control message to the transmitter; the transmitter stops transmitting at least one first packet to the at least one base station in response to the control message; the at least one base station buffers a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets, wherein the transmission-unfinished packets are packets have been received, by the at least one base station, from the transmitter but have not been transmitted, by the at least one base station, to the receiver in the cellular communication mode, wherein each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets; and the receiver receives the transmission-unfinished packets and the transmission-unfinished packet statuses related to the transmission-unfinished packets forwarded by the at least one base station before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the cellular communication mode to the device-to-device communication mode. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A base station, comprising:
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a communication unit; a storage unit, storing a plurality of program codes; and a processing unit, connecting to the storage unit and the communication unit, and accessing the program codes to perform steps of; when the base station or a core network entity determines that a communication mode between a transmitter and a receiver requires to be switched from a cellular communication mode to a device-to-device communication mode, sending a control message to the transmitter, so as to control the transmitter to stop transmitting at least one first packet to the base station; buffering a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets, wherein the transmission-unfinished packets are packets have been received, by the base station, from the transmitter but have not been transmitted, by the base station, to the receiver in the cellular communication mode, wherein each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets; and forwarding the transmission-unfinished packets and the transmission-unfinished packet statuses related to the transmission-unfinished packets to the receiver before the base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the cellular communication mode to the device-to-device communication mode. - View Dependent Claims (16, 17, 18, 19)
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20. A receiver, comprising:
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a communication unit; a storage unit, storing a plurality of program codes; and a processing unit, connecting to the storage unit and the communication unit, and accessing the program codes to perform steps of; when at least one base station or a core network entity determines that a communication mode between a transmitter and the receiver requires to be switched from a cellular communication mode to a device-to-device communication mode, receiving a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets forwarded by the at least one base station before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the cellular communication mode to the device-to-device communication mode, wherein the transmission-unfinished packets are packets have been received, by the at least one base station, from the transmitter but have not been transmitted, by the at least one base station, to the receiver in the cellular communication mode, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets. - View Dependent Claims (21)
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22. A method for switching communication connection modes, adapted to a communication system comprising a transmitter, a receiver and at least one base station, and the method comprising:
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when the at least one base station or a core network entity determines that a communication mode between the transmitter and the receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, sending a control message by the at least one base station to the transmitter; stopping transmitting, by the transmitter, at least one first packet to the receiver in response to the control message; and forwarding, by the transmitter, a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets to the at least one base station before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have not been transmitted, by the transmitter, to the receiver in the device-to-device communication mode, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A communication system, comprising:
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a transmitter; a receiver; and at least one base station, wherein when the at least one base station or a core network entity determines that a communication mode between the transmitter and the receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, the at least one base station sends a control message to the transmitter; the transmitter stops transmitting at least one first packet to the receiver in response to the control message; and the transmitter forwards a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets to the at least one base station before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have not been transmitted, by the transmitter, to the receiver in the device-to-device communication mode, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A base station, comprising:
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a communication unit; a storage unit, storing a plurality of program codes; and a processing unit, connecting to the storage unit and the communication unit, and accessing the program codes to perform steps of; when the base station or a core network entity determines that a communication mode between a transmitter and a receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, sending a control message to the transmitter, so as to control the transmitter to stop transmitting at least one first packet to the receiver; and receiving a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets forwarded by the transmitter before the base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have not been transmitted, by the transmitter, to the receiver in the device-to-device communication mode, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets. - View Dependent Claims (35, 36)
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37. A transmitter, comprising:
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a communication unit; a storage unit, storing a plurality of program codes; and a processing unit, connecting to the storage unit and the communication unit, and accessing the program codes to perform steps of; when at least one base station or a core network entity determines that a communication mode between the transmitter and a receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, receiving a control message from the at least one base station; stopping transmitting at least one first packet to the receiver in response to the control message; and forwarding a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets to the at least one base station before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have not been transmitted, by the transmitter, to the receiver in the device-to-device communication mode, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets.
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38. A method for switching communication connection modes, adapted to a communication system comprising a transmitter, a receiver and at least one base station, and the method comprising:
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when the at least one base station or a core network entity determines that a communication mode between the transmitter and the receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, sending a control message by the at least one base station to the transmitter and the receiver; stopping transmitting, by the transmitter, at least one first packet to the receiver in response to the control message; and forwarding, by the receiver, a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets to the at least one base station in response to the control message before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have been received, by the receiver, from the transmitter in the device-to-device communication mode and are out-of-sequence, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets. - View Dependent Claims (39, 40, 41, 42, 43)
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44. A communication system, comprising:
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a transmitter; a receiver; and at least one base station, wherein when the at least one base station or a core network entity determines that a communication mode between the transmitter and the receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, the at least one base station sends a control message to the transmitter and the receiver; the transmitter stops transmitting at least one first packet to the receiver in response to the control message; and the receiver forwards a plurality of transmission-unfinished packet and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets to the at least one base station in response to the control message before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have been received, by the receiver, from the transmitter in the device-to-device communication mode and are out-of-sequence, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets. - View Dependent Claims (45, 46, 47, 48, 49)
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50. A base station, comprising:
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a communication unit; a storage unit, storing a plurality of program codes; and a processing unit, connecting to the storage unit and the communication unit, and accessing the program codes to perform steps of; when the base station or a core network entity determines that a communication mode between a transmitter and a receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, sending a control message to the transmitter and the receiver, so as to control the transmitter to stop transmitting at least one first packet to the receiver, and controlling the receiver to forward a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets to the base station before the base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have been received, by the receiver, from the transmitter in the device-to-device communication mode and are out-of-sequence, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets. - View Dependent Claims (51, 52)
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53. A receiver, comprising:
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a communication unit; a storage unit, storing a plurality of program codes; and a processing unit, connecting to the storage unit and the communication unit, and accessing the program codes to perform steps of; when at least one base station or a core network entity determines that a communication mode between a transmitter and the receiver requires to be switched from a device-to-device communication mode to a cellular communication mode, receiving a control message from the at least one base station; and forwarding a plurality of transmission-unfinished packets and a plurality of transmission-unfinished packet statuses related to the transmission-unfinished packets to the at least one base station in response to the control message before the at least one base station or the core network entity has completed switching the communication mode between the transmitter and the receiver from the device-to-device communication mode to the cellular communication mode, wherein the transmission-unfinished packets are packets have been received, by the receiver, from the transmitter in the device-to-device communication mode and are out-of-sequence, and each of the transmission-unfinished packet statuses is a packet data convergence protocol sequence number of each of the transmission-unfinished packets.
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Specification