1. An address assignment method for at least one bus device that has been newly connected to a bus system, comprising:
transmitting a new address and an identification from a bus master to a bus device initially addressable at a pre-set address;
comparing, at the bus device, the identification transmitted from the bus master with a preset identification stored in the bus device; and
assuming, at the bus device, the new address transmitted from the bus master, if the identification transmitted from the bus master corresponds to the preset identification stored in the bus device, so that the bus device is subsequently addressable at the new address.
2. An address assignment method as claimed in claim 1, wherein said method does not comprise acknowledging, by the bus device, transmission of the identification and the new address.
3. An address assignment method as claimed in claim 1, further comprising checking by the bus master, before transmitting the identification and the new address, whether a different bus device is already addressable at the new address.
4. An address assignment method as claimed in claim 1, further comprising:
checking by the bus master, immediately after transmitting the identification and the new address, whether the bus device newly connected to the bus system is addressable at the new address, and
retransmitting the identification and the new address by the bus master, if the bus device newly connected to the bus system is not addressable.
5. An address assignment method as claimed in claim 1, further comprising retentively storing the new address by the bus device.
6. An address assignment method as claimed in claim 1, wherein the bus system uses a field bus.
7. An address assignment method as claimed in claim 1, wherein the bus system uses a PROFIBUS.
8. At least one computer readable medium storing a program to control a bus master to perform a method comprising:
transmitting a new address and an identification from a bus master to a bus device initially addressable at a pre-set address;
comparing, at the bus device, the identification transmitted from the bus master with a preset identification stored in the bus device; and
assuming, at the bus device, the new address transmitted from the bus master, if the identification transmitted from the bus master corresponds to the preset identification stored in the bus device, so that the bus device is subsequently addressable at the new address.
9. At least one computer readable medium as claimed in claim 8, wherein said method does not comprise acknowledging, by the bus device, transmission of the identification and the new address.
10. At least one computer readable medium as claimed in claim 8, said method further comprising checking by the bus master, before transmitting the identification and the new address, whether a different bus device is already addressable at the new address.
11. At least one computer readable medium as claimed in claim 8, further comprising:
checking by the bus master, immediately after transmitting the identification and the new address, whether the bus device newly connected to the bus system is addressable at the new address, and
retransmitting the identification and the new address by the bus master, if the bus device newly connected to the bus system is not addressable.
12. At least one computer readable medium as claimed in claim 8, further comprising retentively storing the new address by the bus device.
13. At least one computer readable medium as claimed in claim 8, wherein the bus system uses a field bus.
14. A bus master connected via a bus system to at least one bus device that has been newly connected to the bus system, comprising:
an output unit to transmit a new address and an identification to a bus device initially addressable at a pre-set address, the bus device comparing the identification transmitted from said bus master with a preset identification stored in the bus device and assuming the new address transmitted from said bus master, if the identification transmitted from said bus master corresponds to the preset identification stored in the bus device, so that the bus device is subsequently addressable at the new address.
15. A bus master as claimed in claim 14, further comprising a checking unit to check whether a different bus device is already addressable at the new address before transmitting the identification and the new address.
16. A bus master as claimed in claim 15,
wherein the checking unit also checks whether the bus device newly connected to the bus system is addressable at the new address, immediately after transmitting the identification and the new address, and
wherein the output unit retransmits the identification and the new address, if the bus device newly connected to the bus system is not addressable.
17. A bus master as claimed in claim 14, wherein the bus device uses a field bus.
18. A bus device newly connected via a bus system to a bus master, comprising:
an input unit to receive a new address and an identification from a bus master to a bus device initially addressable at a pre-set address;
at least one storage unit to store a preset identification; and
a processing unit to compare the identification transmitted from the bus master with the preset identification and to assume the new address transmitted from the bus master, if the identification transmitted from the bus master corresponds to the preset identification stored in said at least one storage unit, so that said bus device is subsequently addressable at the new address.
19. A bus device as claimed in claim 18, wherein said bus device does not acknowledge receipt of the identification and the new address.
20. A bus device as claimed in claim 18, wherein said at least one storage unit retentively stores the new address by the bus device.
21. A bus device as claimed in claim 18, wherein the bus system uses a field bus.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for data transmission, comprising:
determining that data to be transmitted is control plane signaling related to a user equipment that camps on a relay node; and
transmitting the data to be transmitted through a first user data bearer established between the relay node and a donor base station, wherein the first user data bearer provides integrity protection for the data to be transmitted.
2. The method according to claim 1, wherein before the transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station, the method further comprises:
in a process of accessing the donor base station by the relay node, or after there is a user equipment that camps on the relay node, establishing the first user data bearer on a radio interface between the relay node and the donor base station.
3. The method according to claim 1, wherein the data to be transmitted is uplink data to be transmitted on the relay node, and the determining that the data to be transmitted is the control plane signaling related to the user equipment that camps on the relay node comprises:
determining, by the relay node, that the uplink data is the control plane signaling related to the user equipment that camps on the relay node;
the transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station comprises:
transmitting, by the relay node, the uplink data to the donor base station through the first user data bearer, so that the donor base station transmits the uplink data to an evolved packet core network node of the relay node through a first transmission bearer, wherein the first transmission bearer is a transmission bearer that corresponds to the first user data bearer and is established between the donor base station and the evolved packet core network node of the relay node.
4. The method according to claim 1, wherein the data is downlink data on an evolved packet core network node of the relay node, and the determining that the data to be transmitted is the control plane signaling related to the user equipment that camps on the relay node comprises:
determining, by the evolved packet core network node of the relay node, that the downlink data is the control plane signaling related to the user equipment that camps on the relay node;
before the transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station, the method further comprises:
transmitting, by the evolved packet core network node of the relay node, the downlink data to the donor base station through a first transmission bearer that corresponds to the first user data bearer and is established between the donor base station and the evolved packet core network node of the relay node;
the transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station comprises:
transmitting, by the evolved packet core network node of the relay node, the downlink data to the relay node through the first user data bearer established between the relay node and the donor base station.
5. The method according to claim 1, wherein the data is uplink data to be transmitted on the relay node, and the determining that the data to be transmitted is the control plane signaling related to the user equipment that camps on the relay node comprises:
determining, by the relay node, that the uplink data is the control plane signaling related to the user equipment that camps on the relay node;
the transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station comprises:
transmitting, by the relay node, the uplink data to the donor base station through the first user data bearer.
6. The method according to claim 1, wherein the data is downlink data to be transmitted on the donor base station, and the determining that the data to be transmitted is the control plane signaling related to the user equipment that camps on the relay node comprises:
determining, by the donor base station, that the downlink data is the control plane signaling related to the user equipment that camps on the relay node;
the transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station comprises:
transmitting, by the donor base station, the downlink data to the relay node through the first user data bearer.
7. The method according to claim 1, wherein after the determining that the data to be transmitted is the control plane signaling related to the user equipment that camps on the relay node, the method further comprises:
obtaining a control indication set for the first user data bearer, and executing, according to the control indication, the step of transmitting the data through the first user data bearer established between the relay node and the donor base station.
8. The method according to claim 7, wherein the executing, according to the control indication, the step of transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station comprises:
setting, according to the control indication, an attribute of a Packet Data Convergence Protocol (PDCP) peer layer to: activate integrity protection or setting to: the data being the control plane signaling related to the user equipment that camps on the relay node; and
executing, according to the set attribute of the PDCP peer layer, the step of transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station.
9. The method according to claim 1, wherein the determining that the data to be transmitted is the control plane signaling related to the user equipment that camps on the relay node comprises:
parsing identifier bit(s) in a packet header of the data to be transmitted, and determining, according to a value of the identifier bit(s), that the data to be transmitted is the control plane signaling related to the user equipment that camps on the relay node, wherein the identifier bit(s) comprise one or any combination of the following: a protocolnext packet header, a source Internet Protocol (IP) address, a destination IP address, a tunnel endpoint identifier, and a PDCP header control planeuser plane indication.
10. The method according to claim 1, wherein before the transmitting the data to be transmitted through the first user data bearer established between the relay node and the donor base station, the method further comprises:
carrying a control indication in the data, wherein the control indication is used to indicate that integrity protection is provided for the data, so that a device that receives the data to be transmitted performs integrity detection on the received data to be transmitted according to the control indication.
11. A relay node, being capable of communicating with a donor base station, comprising:
a bearer establishing module, configured to establish a first user data bearer between the relay node and the donor base station;
a first type identifying module, configured to determine a data type of uplink data to be transmitted; and
a first transmitting module, configured to transmit the uplink data to be transmitted to the donor base station through the first user data bearer established by the bearer establishing module when the first type identifying module determines that the data type of the uplink data to be transmitted is control plane signaling related to a user equipment that camps on the relay node, wherein the first user data bearer provides integrity protection for the uplink data to be transmitted.
12. The relay node according to claim 11, wherein the bearer establishing module is further configured to establish a second user data bearer between the relay node and the donor base station; and
the relay node further comprises:
a second transmitting module, configured to transmit the uplink data to be transmitted to the donor base station through the second user data bearer established by the bearer establishing module when the first type identifying module determines that the data type of the uplink data to be transmitted is user plane data related to the user equipment that camps on the relay node, wherein the second user data bearer provides cipher protection for the uplink data to be transmitted.
13. The relay node according to claim 11, wherein the bearer establishing module is configured to establish the first user data bearer on a radio interface between the relay node and the donor base station in a process of accessing the donor base station by the relay node or after the user equipment camps on the relay node.
14. The relay node according to claim 11, wherein the first type identifying module is configured to parse identifier bit(s) in a packet header of the uplink data to be transmitted, and determine, according to the value of the identifier bit(s), the data type of the uplink data to be transmitted, wherein the identifier bit(s) comprise one or any combination of the following: a protocolnext packet header, a source Internet Protocol (IP) address, a destination IP address, a tunnel endpoint identifier, and a PDCP header control planeuser plane indication.
15. A donor base station, being capable of communicating with a relay node, comprising:
a third type identifying module, configured to determine a data type of downlink data to be transmitted; and
a fifth transmitting module, configured to transmit the downlink data to be transmitted to the relay node through a first user data bearer established between the relay node and the donor base station when the third type identifying module determines that the data type of the downlink data to be transmitted is control plane signaling related to a user equipment that camps on the relay node, wherein the first user data bearer provides integrity protection for the downlink data to be transmitted.
16. The donor base station according to claim 15, further comprising:
a sixth transmitting module, configured to transmit the downlink data to be transmitted to the relay node through a second user data bearer established between the relay node and the donor base station when the third type identifying module determines that the data type of the downlink data to be transmitted is user plane data related to the user equipment that camps on the relay node, wherein the second user data bearer provides cipher protection for the downlink data to be transmitted.
17. The donor base station according to claim 15, wherein the third type identifying module is configured to parse identifier bit(s) in a packet header of the downlink data to be transmitted, and determine, according to a value of the identifier bit(s), the data type of the downlink data to be transmitted, wherein the identifier bit(s) comprise one or any combination of the following: a protocolnext packet header, a source Internet Protocol (IP) address, a destination IP address, a tunnel endpoint identifier, and a PDCP header control planeuser plane indication.