特許4642898号(請求項1) English translation 3GPP TS 25.322 V6.9.0
移動通信システムにおけるデータを送信する方法であって、

A method of transmitting data in a mobile communication system, comprising

1 Scope
The present document specifies the Radio Link Control protocol for the UE-UTRAN radio interface.
Features for the current Release:

Unacknowledged mode.
上位階層からサービスデータユニット(SDU)を受信し receiving a service data unit (SDU) from an upper layer and 4.2.1.2.1 Transmitting UM RLC entity
The transmitting UM-RLC entity receives RLC SDUs from upper layers through the UM-SAP.
前記SDUが一つのプロトコルデータユニット(PDU)に含まれるか否かを判定する段階と、

determining whether the SDU is included in one protocol data unit (PDU);

4.2.1.2.1 Transmitting UM RLC entity

The transmitting UM RLC entity segments the RLC SDU into UMD PDUs of appropriate size, if the RLC SDU is larger than the length of available space in the UMD PDU
前記SDUが一つのPDUに含まれる場合に、ヘッダーデータフィールドを含む前記PDUを構成する段階と、 if the SDU is included in one PDU, constructing the PDU including a header and a data field,

9.2.1.3 UMD PDU
The UMD PDU is used to transfer user data when RLC is operating in unacknowledged mode. The length of the data part shall be a multiple of 8 bits. The UMD PDU header consists of the first octet, which contains the “Sequence Number”

 

ここで、前記ヘッダーは、一連番号(SN)フィールドと、 wherein the header includes a sequence number (SN) field and

9.2.1.3 UMD PDU

The UMD PDU header consists of the first octet, which contains the “Sequence Number”. 

前記PDUが分割、連結、またはパディングなしに前記データフィールドに前記SDUを完全に含むことを指示する1ビットフィールドと、を含み、

one bit field indicating that the PDU completely includes the SDU in the data field without splitting, concatenating, or padding;

9.2.2.5 Extension bit (E)
Length: 1bit.
The interpretation of this bit depends on RLC mode and higher layer configuration:
-In the UMD PDU, the “Extension bit” in the first octet has either the normal E-bit interpretation or the alternative E-bit interpretation depending on higher layer configuration. The “Extension bit” in all the other octects always has the normal E-bit interpretation.

前記SDUが一つのPDUに含まれない場合に、前記SDUを伝送可能なPDUのサイズにより複数のセグメントに分割し、各PDUのデータフィールドが前記複数のセグメントのうち一つのセグメントを含む複数のPDUを構成する段階と、

if the SDU is not included in one PDU, segmenting the SDU into a plurality of segments according to the transmittable PUD size, and constructing a plurality of PDUs, wherein a data field of each PDU comprises a segment of the plurality of segments and

4.2.1.2.1 Transmitting UM RLC entity

The transmitting UM RLC entity segments the RLC SDU into UMD PDUs of appropriate size, if the RLC SDU is larger than the length of available space in the UMD PDU.

ここで、前記各PDUのヘッダーは、SNフィールド

the header of each PDU comprises an SN field, 

9.2.1.3 UMD PDU

The UMD PDU header consists of the first octet, which contains the “Sequence Number”

少なくとも一つの長さインジケータ(LI)フィールドが存在することを示す1ビットフィールド one bit field indicating that at least one length indicator (LI) field is present, and 

9.2.2.5 Extension bit (E)
Length: 1bit.
The interpretation of this bit depends on RLC mode and higher layer configuration:
-In the UMD PDU, the “Extension bit” in the first octet has either the normal E-bit interpretation or the alternative E-bit interpretation depending on higher layer configuration. The “Extension bit” in all the other octects always has the normal E-bit interpretation.

そして前記少なくとも一つのLIフィールドを含み、 the at least one LI field, and 4.2.1.2.1 Transmitting UM RLC entity

Length Indicators are used to define boundaries between RLC SDUs within UMD PDUs unless the “Extension bit” already indicates that a UMD PDU contains exactly one complete SDU. 
前記PDUの前記データフィールドが前記SDUの中間セグメントを含むと、前記LIフィールドは前記PDUが前記SDUの最初のセグメントでも最後のセグメントでもない中間セグメントを含むことを示す予め定められた値に設定され、 if the data field of the PDU contains an intermediate segment of the SDU, setting the LI field to a predetermined value indicating that the PDU includes an intermediate segment that is neither a first segment nor a last segment of the SDU and 9.2.2.8 Length Indicator (LI)…  
In the case where the “alternative E-bit interpretation” is configured for UM RLC and an RLC PDU contains a segment of an SDU but neither the first octet nor the last octet of this SDU:
– if a 7-bit “Length Indicator” is used:
– the “Length Indicator” with value “111 1110” shall be used.
– if a 15-bit “Length Indicator” is used:
– the “Length Indicator” with value “111 1111 1111 1110” shall be used.
前記PDUを受信器に伝送する段階と、を有することを特徴とするデータ送信方法。 transmitting the PDU to a receiver. 4.2.1.2.1 Transmitting UM RLC entity

The transmitting UM RLC entity submits UMD PDUs to the lower layer through either a CCCH, SHCCH, DCCH, CTCH, DTCH, MCCH, MSCH or an MTCH logical channel.