Abstract
A method and apparatus for enabling efficient use of radio resources by reducing an RLC PDU size in a mobile communication system supporting voice service over a packet network are provided. An RLC layer constructs an RLC PDU without inserting information indicating the start and end of an SDU or indicating the use or non-use of padding. The RLC layer sets an LI in a header to indicate inclusion of an intermediate SDU segment in the data field of the RLC PDU. Therefore the resulting decrease of overhead arising from packet transmission facilitates the efficient use of limited radio resources.
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Specification Information
Specification Information
Technologies
Family Information
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| All Pending Patents In Patent Family : | ---- |
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Protocol Stack
Product
Base Station (eNB/gNB)User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Transmitting/receiving of data channel
Claim
1. A method of transmitting data using a pre-defined length indicator (LI) in a mobile communication system, comprising: receiving a service data unit (SDU) from a higher layer and determining whether the SDU can be comprised in one protocol data unit (PDU); segmenting the SDU into a plurality of segments according to a transmittable PDU size, if the SDU cannot be comprised in one PDU; constructing a plurality of PDUs comprising the segments in data fields, each PDU comprising a header with a serial number (SN) field, at least one-bit field indicating the presence of at least one LI field, and the at least one LI field, and an LI field of a PDU with an intermediate segment of the SDU in a data field set to a value indicating the presence of the intermediate segment; and sending the PDUs to a receiver.
2. The method of claim 1, further comprising the step of constructing a PDU comprising the SDU in a data field and an SN field and a one-bit field indicating the absence of an LI field in a header, if the SDU can be comprised in one PDU.
3. The method of claim 1, wherein the determining comprises, if a PDU size except the SN field and the one-bit field for a next transmission interval matches to the size of the SDU, determining the PDU size according to the size of the SDU and a radio channel condition, determining that the SDU can be comprised in one PDU.
4. The method of claim 1, wherein LI fields of PDUs comprising the first and last segments of the SDU in data fields are set to values indicating inclusion of the first segment of the SDU and inclusion of the last segment of the SDU.
5. The method of claim 1, wherein the SDU comprises an internet protocol (IP) packet.
6. A method of receiving data using a pre-defined length indicator (LI) in a mobile communication system, comprising: receiving a protocol data unit (PDU) from a transmitter and detecting a sequence number (SN) field and a one-bit field indicating at least one of the presence and absence of a following LI field from a header of the PDU; detecting the following LI field from the header of the PDU, if the one-bit field indicates the presence of the LI field, and determining whether the LI field is set to a value indicating inclusion of an intermediate segment of a service data unit (SDU) in a data field of the PDU; storing the PDU until the PDU can be assembled with a previous segment and a following segment, if the LI field is set to the value; and constructing the SDU by combining the intermediate segment from the data field of the PDU with at least one previous segment extracted from a data field of at least one previous PDU and at least one following segment extracted from a data field of at least one following PDU.
7. The method of claim 6, further comprising acquiring one concrete SDU from the data field of the PDU if the one-bit field indicates the absence of the LI field.
8. The method of claim 6, wherein the storing comprises the steps of storing the PDU in a reception buffer according to the SN field of the PDU.
9. The method of claim 8, wherein the constructing comprises constructing the SDU by combining segments extracted from data fields of a set of PDUs stored in the reception buffer, if the first of the PDUs comprises an LI field indicating inclusion of the first segment of the SDU, if at least one intermediate PDU among the PDUs comprises an LI field set to the value, and if the first LI field of the last of the PDUs indicates the position of the last byte of the SDU
10. An apparatus for transmitting data using a pre-defined length indicator (LI) in a mobile communication system, comprising: a transmission buffer for receiving a service data unit (SDU) from a higher layer, determining whether the SDU can be comprised in one protocol data unit (PDU), and reconstructing the SDU to at least one segment according to a transmittable PDU size; a header inserter for constructing at least one PDU comprising the at least one segment in a data field and comprising a serial number (SN) field and a one- bit field in a header; a one-bit field setter for setting the one-bit field of the at least one PDU to indicate at least one of the presence and an absence of a following LI field; an LI inserter for inserting an LI field after the one-bit field in the at least one PDU if the SDU cannot be comprised in one PDU, and setting an LI field to a value indicating inclusion of an intermediate segment in a PDU comprising an intermediate segment of the SDU in a data field; and a transmitter for sending the at least one PDU received from the LI inserter to a receiver
11. The apparatus of claim 10, wherein if the SDU cannot be comprised in one PDU, the LI inserter provides a PDU comprising an SN field and a one-bit field indicating the absence of an LI field in a header and comprising the entire SDU in a data field to the transmitter
12. The apparatus of claim 10, wherein if a PDU size except the SN field and the one-bit field for a next transmission interval matches to the size of the SDU, the PDU size being determined according to the size of the SDU and a radio channel condition, the transmission buffer determines that the SDU can be comprised in one PDU
13. The apparatus of claim 10, wherein the LI inserter sets LI fields of PDUs comprising the first and last segments of the SDU in data fields to values indicating inclusion of the first segment of the SDU and inclusion of the last segment of the SDU
14. The apparatus of claim 10, wherein the SDU comprises an internet protocol (IP) packet
15. An apparatus for receiving data using a pre-defined length indicator (LI) in a mobile communication system, comprising: a reception buffer for receiving a protocol data unit (PDU) from a transmitter and storing the PDU; a reassembly controller for detecting a sequence number (SN) field and a one-bit field indicating at least one of the presence and absence of a following LI field from a header of the PDU, interpreting the following LI field from the header of the PDU, if the one-bit field indicates the presence of the LI field, and controlling the reception buffer to store the PDU until the PDU can be assembled with a previous segment and a following segment, if the LI field is set to a value indicating inclusion of an intermediate segment of a service data unit (SDU) in a data field of the PDU; a header and LI remover for extracting an intermediate segment from the data field of the PDU by eliminating the SN field, the one-bit field, and the LI field if the one-bit field indicates the presence of the LI field; and a reassembler for receiving the intermediate segment from the header and LI remover and constructing the SDU by combining the intermediate segment with at least one previous segment extracted from a data field of at least one previous PDU and at least one following segment extracted from a data field of at least one following PDU
16. The apparatus of claim 15, wherein the header and LI remover eliminate the SN field and the one-bit field from the PDU and provide the PDU as the SDU if the one-bit field indicates the absence of the LI field
17. The apparatus of claim 15, wherein the reception buffer stores the PDU according to the SN field of the PDU
18. The apparatus of claim 17, wherein the reassembler constructs the SDU by combining segments extracted from data fields of a set of PDUs stored in the reception buffer, if the first of the PDUs comprises an LI field indicating inclusion of the first segment of the SDU, if at least one intermediate PDU among the PDUs comprises an LI field set to the value, and if the first LI field of the last of the PDUs indicates the position of the last byte of the SDU.']
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SUMMARY
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.