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Method and device for carrying out MAC (Medium Access Control) control unit transmission
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A technology of control unit and sending equipment, applied in electrical components, network traffic/resource management, wireless communication, etc., can solve the problem that the number of LCIDs cannot meet the requirements of 5GNR
Active Publication Date: 2017-08-15
DATANG MOBILE COMM EQUIP CO LTD
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[0006] The present invention provides a method and device for transmitting a MAC control unit to solve the problem that the number of LCIDs in the prior art cannot meet the requirements of 5G NR
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Embodiment 1
[0076] Embodiment 1: The MAC subheader of the BSR is reported for buffer status.
[0077] In LTE, there are five types of buffer status report BSRs: long BSR, short BSR, truncated BSR, straight-through BSR (Sidelink BSR), and truncated straight-through BSR (Truncated Sidelink BSR). The first three are fixed length, and the last two are variable length.
[0078] For the above methods, the embodiment of the present invention provides the following four MAC subheader structures:
Embodiment 1-1
[0079] Embodiment 1-1: All BSRs multiplex one logical channel number LCIDO.
[0080] At this time, the length of the I field (that is, the message typesubdivision field) is 3 bits, and the format of the MAC subheader is as follows figure 2 As shown, the MAC sub-header in the figure is 1 byte. Since the 3-bit I field and the 5-bit LCID field are used, no bits are reserved. If the LCID extension length is greater than 5 bits, the length of the MAC subheader needs to be 2 bytes. In the figure, the L field appears only when it indicates Sidelink BSR or TruncatedSidelink BSR.
[0081] Wherein, different values in the I field represent different MAC CE types, an example is shown in Table 1. All BSR types correspond to the same value of the LCID number of the MAC subheader.
[0082] Table 1 All BSR types multiplex a logical channel number
[0083]
Embodiment 1-2
[0084] Embodiment 1-2: Long BSR, short BSR, and truncated BSR are classified into one category, and the logical channel number LCID1 is multiplexed; SidelinkBSR and Truncated Sidelink BSR are classified into one category, and the logical channel number LCID2 is multiplexed.
[0085] At this time, the length of the I field is 2 bits, and the format of the MAC subheader is as follows image 3 and Figure 4 As shown, the MAC sub-header in the figure is 1 byte, since the 2-bit I field and the 5-bit LCID field are used, there is 1 bit reserved. If the length of the LCID is extended to 6 bits, there is no reserved bit. If it is greater than 6 bits, the length of the MAC subheader needs to be 2 bytes.
[0086] Wherein, different values in the I field represent different MAC CE types, an example is shown in the following table.
[0087] Table 2 The BSR types are divided into two categories, and each category multiplexes a logical channel number
[0088]
[0089]
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Abstract
The invention relates to the technical field of wireless communication, particularly relates to a method and device for carrying out MAC (Medium Access Control) unit transmission and is used for solving the problem that in the prior art the number of LCIDs (Logical Channel IDs) cannot satisfy a 5G NR (New Radio) demand. According to the embodiment of the invention, a sending device determines MAC heads containing the LCIDs and distinguishment indication information according to MAC units and sends MAC PDUs (Protocol Data Units) containing the MAC heads and the corresponding MAC units; the LCIDs and the distinguishment indication information are jointly used for uniquely identifying the MAC units. According to the embodiment of the invention, the LCIDs and the distinguishment indication information are jointly used for uniquely identifying the MAC units, so the different MAC units can share the same LCID, on the premise of not introducing more LCIDs, the more MAC units can be identified, and the 5G NR demand can be satisfied.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and equipment for transmitting MAC control units. Background technique [0002] In LTE (Long Term Evolution, long-term evolution) MAC (Medium Access Control, Media Access Control) PDU (Protocol Data Unit, protocol data unit) format, "R" indicates reserved bits; "F2" and "F" jointly indicate The length of the L domain, as shown in Table 1, if the length of the MAC SDU (Service Data Unit, business data unit) or MAC CE (Control Element, control unit) corresponding to the MAC subhead is greater than 32767bytes, F2=1, otherwise F2 =0; "E" is used to indicate whether the follow-up is a MAC sub-header, if the follow-up is a MAC sub-header, E=1, otherwise E=0; "LCID (Logical Channel ID, logical channel number)" is a logical channel number, each The logical channel corresponding to each RB (Radio Bearer radio bearer) has a logical channel number LCID, and ...
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