CN106559808B

CN106559808B - Media access control layer processing method and device

Info

Publication number: CN106559808B
Application number: CN201510626593.7A
Authority: CN
Inventors: 吴昱民; 马子江; 许辉
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-09-28
Filing date: 2015-09-28
Publication date: 2020-09-29
Anticipated expiration: 2035-09-28
Also published as: WO2017054509A1; CN106559808A

Abstract

The invention provides a method and a device for processing a media access control layer, wherein the method comprises the following steps: the sending end and the receiving end of the media access control MAC layer agree to set the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in different media access control layer protocol data units MAC PDU. The invention solves the problem that how to divide the logical channel by the MAC layer can more effectively multiplex the control channel information and the data channel information in the same MAC PDU as much as possible under SC-PTM in the related technology, thereby achieving the effect of more effectively utilizing the available logical channel number and multiplexing the control channel information and the data channel information in the same MAC PDU as much as possible.

Description

Media access control layer processing method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for processing a media access control layer.

Background

1. MBMS introduction

MBMS in LTE (long Term evolution), also called embms (evolved MBMS), mainly functions to implement broadcast and multicast services in LTE systems. At present, MBMS is mainly implemented by a hybrid cell, i.e. a cell transmitting MBMS services also transmits unicast services. And a plurality of MBMS cells can form an MBSFN (multimedia broadcast multicast service Single Frequency network) area, and the same MBMS service is broadcasted in the same MBSFN. While a ca (carrier aggregation) capable UE can receive MBMS on an SCell, and needs to receive corresponding system information and system information change notification on the SCell receiving MBMS.

For the UE with the carrier aggregation capability, the UE can simultaneously transmit and receive unicast service at a plurality of frequency points. Therefore, the UE also needs to be able to receive the MBMS service at multiple frequency points, and the frequency point for receiving the MBMS service does not need to be a service frequency point of the UE, and for an IDLE (IDLE) UE, the service frequency point is a resident frequency point of the UE, and for a connected UE, the service frequency point is a working frequency point configured by the network for the UE. When the UE finds that the MBMS frequency point in which the UE is interested is not the service frequency point, the UE needs to be able to configure the non-service frequency point by itself to receive the MBMS service. For the UE, the self-configured frequency point (or self-configured SCell) and other serving frequency points work in the same manner, and the UE needs to receive system information, change of the system information, and related MBMS control information.

The eMBMS related control information includes:

(1) system information:

the SIB13 broadcasts the basic configuration information of each MBSFN to which the current cell belongs, including the configuration of the logical control channel MCCH corresponding to each MBSFN and the configuration of the MCCH change notification.

The SIB15 broadcasts information related to MBMS service continuity, and provides sai (service Area identity) information corresponding to each MBMS frequency point (including the current cell frequency point and the neighboring frequency point). The method is used for assisting the RRC _ IDLE and RRC _ CONNECTED UEs to find the MBMS frequency points in which the UEs are interested, so that the continuous receiving of the MBMS service is ensured in the moving process. For RRC _ IDLE, the MBMS frequency point of interest of SIB15 may be set to a high priority frequency point in order to receive the MBMS service.

(2) Logical channel mcch (multicast Control channel):

a multicast control channel, which is a point-to-multipoint (point-to-multipoint) downlink channel, used for a network to transmit MBMS-related control information and counting information for counting MBMS service interests to UEs, where one MCCH may correspond to one or more MTCHs; this channel can be used only by UEs that can receive the MBMS service. The base station will inform the UE of the modification period and the repetition period of the MCCH through system broadcast, the modification period is generally X times the repetition period, and in a modification period, the MCCH information sent by all the repetition periods is the same, which is to ensure reliable reception of the MCCH. Meanwhile, the change of the MCCH information is indicated by a bit scrambled by an M-RNTI (Multicast-Radio Network Temporary Identity) in a pdcch (physical Downlink Control channel). After acquiring the notification of the change of the MCCH, the UE needs to read the MCCH again.

(3) MAC Scheduling control of eMBMS, msi (mch Scheduling information) MAC CE (ControlElement):

MSI is transmitted as control signaling of the MAC layer in the first subframe of each msp (MCH Scheduling period) to indicate the location of each MTCH and subframes not used in the current MCH.

(4) Logical channel mtch (multicast Traffic channel):

the multicast service channel is a point-to-multipoint downlink channel and is used for transmitting MBMS service data to the UE by the network; this channel can be used only by UEs that can receive the MBMS service. The configuration information of the MTCH is indicated by its corresponding MCCH. The network indicates MTCH to UE by using MCCH, thereby achieving the purpose that UE receives MBMS service carried on MTCH.

(5) Transport channels mch (multicast channel) and physical channels pmch (physical multicast channel):

the MCCH and the MTCH are both mapped to the MCH for transmission, and the MCH is mapped to the PMCH for transmission. Each MCH transmits in one MCH Scheduling period, i.e. msp (MCH Scheduling period).

2. Introduction to SC-PTM technology

When the MBMS service is transmitted in a single cell, in order to improve the efficiency of resource utilization, the MBMS service is transmitted in a unicast pdsch (physical Downlink Shared channel) in a dynamic scheduling manner. The transmission of SC-PTMs still requires a corresponding control channel (e.g., SC-MCCH, Single Cell MCCH) and data channel (e.g., SC-MTCH, Single Cell MTCH). And the control channel and the data channel are transmitted through different physical channels, respectively.

3. Introduction of MAC function

The current MAC PDU includes the following units:

(1) MAC header for indicating MAC CE contained in MAC PDU; MAC SDU; position of Padding.

(2) MAC CE (Control Element) is used for transmitting Control information of the MAC layer.

(3) MAC SDU: for carrying data packets at higher layers, containing information from different logical channels.

(4) Padding, namely adding extra redundancy information when the sum of the information and the data part size of the MAC cannot meet the size of the transmission block indicated by the bottom layer.

The MAC PDUs currently used for the downlink Shared channel DL-sch (downlink Shared channel) and the multicast channel mch (multicast channel) are shown in fig. 1: in order to ensure that control information and data from a higher layer can be transmitted in the same MAC PDU, the MAC layer assigns corresponding Logical Channel numbers (LCIDs) to the control information and different higher layer entities to distinguish the control information from the different higher layer entity data.

Disclosure of Invention

The invention provides a method and a device for processing a media access control layer, which at least solve the problem that how a MAC layer divides a logic channel can more effectively multiplex control channel information and data channel information in the same MAC PDU as much as possible under SC-PTM in the related technology.

According to an aspect of the present invention, there is provided a method for processing a media access control layer, including: the sending end and the receiving end of the media access control MAC layer agree to set the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in different media access control layer protocol data units MAC PDU.

Further, the method further comprises: and the transmitting end of the MAC layer multiplexes the control channel information and Padding information of the SC-PTM in the same MAC PDU.

Further, the control channel information of the SC-PTM occupies an independent logical channel number, and the Padding information occupies an independent logical channel number.

Further, other logical channel numbers than the logical channel number occupied by the control channel information of the SC-PTM and the logical channel number occupied by the Padding information are reserved for other control channels and/or data channels.

Further, the method further comprises: and the transmitting end of the MAC layer multiplexes the data channel information and Padding information of the SC-PTM in the same MAC PDU.

Further, the data channel information of the SC-PTM occupies an independent logical channel number, and the Padding information occupies an independent logical channel number.

Further, the sender and the receiver of the MAC layer agree to determine whether to reserve any logical channel number other than the logical channel number occupied by the control channel information of the SC-PTM and the logical channel number occupied by the Padding information to another control channel and/or data channel.

According to another aspect of the present invention, there is provided a MAC layer processing apparatus, located in a transmitting end of a MAC layer, the apparatus including: and the setting module is used for setting the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in different media access control layer protocol data units (MAC PDUs).

Further, the setting module is further configured to multiplex the control channel information of the SC-PTM and the Padding information in the same MAC PDU.

Further, the setting module is further configured to multiplex the data channel information of the SC-PTM and the Padding information in the same MAC PDU.

Further, the setting module is further configured to determine whether to reserve, to other control channels and/or data channels, other logical channel numbers except the logical channel number occupied by the control channel information of the SC-PTM and the logical channel number occupied by the Padding information.

According to another aspect of the present invention, there is provided a MAC layer processing apparatus in a receiving end of a MAC layer, the apparatus comprising: and the receiving module is used for receiving and setting the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in the MAC PDU of the protocol data units MAC PDU of different media access control layers.

The invention adopts the media access control MAC layer to arrange the control channel information and the data channel information of the single-cell point-to-multipoint SC-PTM in different media access control layer protocol data units (MAC PDU), solves the problem that how the MAC layer divides the logic channel can more effectively multiplex the control information and the data information in the same MAC PDU as much as possible under the SC-PTM in the related technology, and further achieves the effect of more effectively utilizing the available logic channel number and multiplexing the control information and the data information in the same MAC PDU as much as possible.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a diagram of a relationship of MAC PDUs of a DL-SCH and an MCH according to the related art;

fig. 2 is a flowchart of a method for processing a mac layer according to an embodiment of the present invention;

fig. 3 is a diagram illustrating formats of MAC PDUs of SC-MCCH and padding according to an embodiment of the present invention;

FIG. 4 is a diagram of a format of MAC PDUs for multiple SC-MTCHs and padding according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a mac layer processing apparatus according to an alternative embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

In this embodiment, a method for processing a mac layer is provided, and fig. 2 is a flowchart of a method for processing a mac layer according to an embodiment of the present invention, where as shown in fig. 2, the flowchart includes the following steps:

step S202, the sending end and the receiving end of the media access control MAC layer appoint to set the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in different media access control layer protocol data units MAC PDU.

By adopting the embodiment of the invention, the control channel information and the data channel information of SC-PTM are arranged in different MAC PDU by adopting the MAC layer, which is more beneficial to multiplexing the same MAC PDU by other information and the control channel information of SC-PTM or multiplexing the same MAC PDU by the data channel information of SC-PTM, and solves the problem that how the MAC layer divides logical channels can multiplex as much control information and data information in the same MAC PDU as possible more effectively in SC-PTM in the related technology, thereby achieving the effect of multiplexing as much control information and data information in the same MAC PDU as possible by using available logical channel numbers more effectively.

On the basis of the above embodiments, the present invention also provides two implementation manners, which are respectively: embodiment 1 and embodiment 2, wherein:

embodiment mode 1

The method further comprises the following steps: and the transmitting end of the MAC layer multiplexes the control channel information and Padding information of the SC-PTM in the same MAC PDU. Under SC-PTM, the logical channel division mode provided by the embodiment is beneficial to realizing that the control channel information and Padding information of SC-PTM multiplex the same MAC PDU, thereby more effectively multiplexing the control information and data information as much as possible in one MAC PDU.

Through the embodiment of the invention, the control channel information and the Padding information of the SC-PTM are respectively allocated with an independent logical channel number, which is more beneficial to allocating corresponding logical channel numbers to other control channels and/or data channels.

Further, other logical channel numbers than the control channel number occupying the independent logical channel number of the SC-PTM and the Padding information occupying the independent logical channel number are reserved for other control channels and/or data channels.

By the embodiment of the invention, the control channel information of SC-PTM occupies the independent logical channel number and the Padding information occupies other logical channel numbers except the independent logical channel number, and is reserved for other control channels and/or data channels.

Embodiment mode 2

Optionally, the method further includes: and the transmitting end of the MAC layer multiplexes the data channel information and Padding information of the SC-PTM in the same MAC PDU. Under SC-PTM, the logical channel division mode provided by the embodiment is beneficial to realizing that the data channel information and Padding information of SC-PTM multiplex the same MAC PDU, thereby more effectively multiplexing the control information and the data information as much as possible in one MAC PDU.

Alternatively, the data channel information of the SC-PTM occupies a separate logical channel number, and the Padding information occupies a separate logical channel number.

Through the embodiment of the invention, the data channel information and the Padding information of the SC-PTM are respectively allocated with an independent logical channel number, which is more beneficial to allocating corresponding logical channel numbers to other control channels and/or data channels.

Optionally, the sender and receiver of the MAC layer agree to decide whether to reserve other logical channel numbers except the logical channel number occupied by the control channel information of the SC-PTM and the logical channel number occupied by the Padding information to other control channels and/or data channels.

By the embodiment of the invention, the data channel information of SC-PTM occupies the independent logic channel number and the other logic channel numbers except the logic channel number occupied by the Padding information are reserved for other control channels and/or data channels, under SC-PTM, the mode of dividing the logic channels by the MAC layer can more effectively multiplex the control information and the data information into the same MAC PDU as much as possible, thereby achieving the effect of more effectively utilizing the available logic channel number and multiplexing the control information and the data information into the same MAC PDU as much as possible.

The invention is illustrated in detail below by way of a few specific examples:

example A:

for a single-cell multicast control channel SC-MCCH, a control channel of the SC-PTM and a logical channel number corresponding to padding are given through protocol agreement or network configuration, and a certain number of logical channel numbers are reserved for other control channels and data channels. The logical channel number (LCID) is assigned as follows:

control channel (such as SC-MCCH) occupies '00000';

padding occupies "11111";

"00001-.

The format of the MAC PDU only including the control channel (corresponding to SC-MCCH in fig. 3) and padding is shown in fig. 3, where each data channel and padding corresponds to different MAC sub-headers and different LCIDs.

Example B:

for the single-cell multicast service channel SC-MTCH with reserved logical channel numbers LCID, the data channel of SC-PTM and the logical channel numbers corresponding to padding are given through protocol agreement or network configuration, and a certain number of logical channel numbers are reserved for other control channels and/or data channels. The logical channel number LCID is assigned as follows:

the data channel (e.g., SC-MTCH) occupies "00000-;

padding occupies "11111";

"11101-.

The format of the MAC pdu comprising a plurality of data channels (corresponding to SC-MTCH _1 through SC-MTCH _ n in fig. 4) and padding is shown in fig. 4, wherein each data channel and padding corresponds to a different MAC sub-header and a different LCID.

Example C:

for a single-cell multicast service channel SC-MTCH no-reservation logical channel number LCID, a data channel of an SC-PTM and a logical channel number corresponding to padding are given through protocol agreement or network configuration, and no extra logical channel number is reserved for other control channels and data channels. The logical channel number (LCID) is assigned as follows:

the data channel (e.g., SC-MTCH) occupies "00000-;

padding occupies "11111";

the format of the MAC PDU of the allocation scheme is the same as that of embodiment B, and is not described herein again.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

Example 2

In this embodiment, a device for processing a mac layer is further provided, where the device is used to implement the foregoing embodiments and preferred embodiments, and details of the foregoing description are omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 5 is a schematic diagram of a MAC layer processing apparatus according to an alternative embodiment of the present invention, as shown in fig. 5, the apparatus is located in a transmitting end of a MAC layer, and includes: a setting module 502, configured to set the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in different mac pdus.

On the basis of the above embodiments, the present invention also provides two implementation manners, which are respectively: embodiment 3 and embodiment 4, wherein:

embodiment 3

The setting module is further configured to multiplex the control channel information of the SC-PTM and the Padding information in the same MAC PDU. Under SC-PTM, the logical channel division mode provided by the embodiment is beneficial to realizing that the control channel information and Padding information of SC-PTM multiplex the same MAC PDU, thereby more effectively multiplexing the control information and data information as much as possible in one MAC PDU.

Further, the control channel information of the SC-PTM occupies an independent logical channel number, and the Padding information occupies an independent logical channel number. Through the embodiment of the invention, the control channel information and the Padding information of the SC-PTM are respectively allocated with an independent logical channel number, which is more beneficial to allocating corresponding logical channel numbers to other control channels and/or data channels.

Further, other logical channel numbers than the control channel number occupying the independent logical channel number of the SC-PTM and the Padding information occupying the independent logical channel number are reserved for other control channels and/or data channels. By the embodiment of the invention, the control channel information of SC-PTM occupies the independent logical channel number and the Padding information occupies other logical channel numbers except the independent logical channel number, and is reserved for other control channels and/or data channels.

Embodiment 4

The setting module is further configured to multiplex the data channel information of the SC-PTM and the Padding information in the same MAC PDU. Under SC-PTM, the logical channel division mode provided by the embodiment is beneficial to realizing that the data channel information and Padding information of SC-PTM multiplex the same MAC PDU, thereby more effectively multiplexing the control information and the data information as much as possible in one MAC PDU.

Alternatively, the data channel information of the SC-PTM occupies a separate logical channel number, and the Padding information occupies a separate logical channel number. Through the embodiment of the invention, the data channel information and the Padding information of the SC-PTM are respectively allocated with an independent logical channel number, which is more beneficial to allocating corresponding logical channel numbers to other control channels and/or data channels.

Optionally, the setting module is further configured to decide whether to reserve other logical channel numbers except the independent logical channel number occupied by the control channel information of the SC-PTM and the independent logical channel number occupied by the Padding information to other control channels and/or data channels. By the embodiment of the invention, the data channel information of SC-PTM occupies the independent logic channel number and the other logic channel numbers except the logic channel number occupied by the Padding information are reserved for other control channels and/or data channels, under SC-PTM, the mode of dividing the logic channels by the MAC layer can more effectively multiplex the control information and the data information into the same MAC PDU as much as possible, thereby achieving the effect of more effectively utilizing the available logic channel number and multiplexing the control information and the data information into the same MAC PDU as much as possible.

Example 3

The media access control layer processing device is positioned in a sending end of a media access control MAC layer and comprises the following components: and the receiving module is used for receiving and setting the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in the MAC PDU of the protocol data units MAC PDU of different media access control layers.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, the media access control MAC layer sets the control channel information and data channel information of single cell point to multipoint SC-PTM in different media access control layer protocol data unit MAC PDU.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

s2, the MAC layer multiplexes the control channel information of SC-PTM and Padding information in the same MAC PDU.

Optionally, in this embodiment, the storage medium is further configured to store program codes for performing the steps in other preferred embodiments in embodiment 1, which are not described herein again.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Optionally, in this embodiment, the processor executes, according to program code stored in the storage medium:

s3, the media access control MAC layer sets the control channel information and data channel information of single cell point to multipoint SC-PTM in different media access control layer protocol data unit MAC PDU.

Optionally, in this embodiment, the processor executes, according to the program code stored in the storage medium:

s4, the MAC layer multiplexes the control channel information of SC-PTM and Padding information in the same MAC PDU.

Optionally, in this embodiment, the processor executes corresponding steps according to the program codes of other preferred embodiments in embodiment 1 that have been stored in the storage medium, which is not described herein again.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A media access control layer processing method is characterized by comprising the following steps:

the sending end and the receiving end of the media access control MAC layer appoint to set the control channel information and the data channel information of the single cell point-to-multipoint SC-PTM in different media access control layer protocol data units MAC PDU;

the method further comprises the following steps:

the sending end of the MAC layer multiplexes the control channel information and Padding information of the SC-PTM in the same MAC PDU;

and/or the presence of a gas in the gas,

the method further comprises the following steps:

and the transmitting end of the MAC layer multiplexes the data channel information and Padding information of the SC-PTM in the same MAC PDU.

2. The method of claim 1,

the control channel information of the SC-PTM occupies an independent logical channel number, and the Padding information occupies an independent logical channel number.

3. The method of claim 2,

other logical channel numbers than the control channel number occupying the independent logical channel number of the SC-PTM and the Padding information occupying the independent logical channel number are reserved for other control channels and/or data channels.

4. The method of claim 1,

the data channel information of the SC-PTM occupies an independent logical channel number, and the Padding information occupies an independent logical channel number.

5. The method of claim 4,

and the sending end and the receiving end of the MAC layer appoint to determine whether other logic channel numbers except the logic channel number which is independent and occupied by the control channel information of the SC-PTM and the logic channel number which is independent and occupied by the Padding information are reserved for other control channels and/or data channels.

6. A MAC layer processing apparatus, located in a transmitting end of a MAC layer, the apparatus comprising:

a setting module, which is used for setting the control channel information and the data channel information of the point-to-multipoint SC-PTM of the single cell in different media access control layer protocol data units (MAC PDU); the setting module is further configured to multiplex the control channel information and Padding information of the SC-PTM in the same MAC PDU, and/or the setting module is further configured to multiplex the data channel information and Padding information of the SC-PTM in the same MAC PDU.

7. The apparatus of claim 6,

8. The apparatus of claim 7,

9. The apparatus of claim 6,

10. The apparatus of claim 9,

the setting module is further used for deciding whether other logical channel numbers except the independent logical channel number occupied by the control channel information of the SC-PTM and the independent logical channel number occupied by the Padding information are reserved for other control channels and/or data channels.

11. An apparatus for MAC layer processing, located in a receiving end of a MAC layer, the apparatus comprising:

a receiving module, configured to receive a media access control layer protocol data unit MAC PDU, and set control channel information and data channel information of a single cell point-to-multipoint SC-PTM in different media access control layer protocol data units MAC PDUs, where the control channel information and Padding information of the SC-PTM are multiplexed in the same MAC PDU, and/or the data channel information and Padding information of the SC-PTM are multiplexed in the same MAC PDU.