CN102333281A - Method and device for acquiring MBMS (Multimedia Broadcast Multicast Service) information - Google Patents

Method and device for acquiring MBMS (Multimedia Broadcast Multicast Service) information Download PDF

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CN102333281A
CN102333281A CN201110302243A CN201110302243A CN102333281A CN 102333281 A CN102333281 A CN 102333281A CN 201110302243 A CN201110302243 A CN 201110302243A CN 201110302243 A CN201110302243 A CN 201110302243A CN 102333281 A CN102333281 A CN 102333281A
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information
lcid
mac
mac header
bearer type
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谢芳
许辉
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ZTE Corp
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ZTE Corp
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Priority to CN201110302243A priority Critical patent/CN102333281A/en
Priority to PCT/CN2011/084672 priority patent/WO2012152032A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method for acquiring MBMS (Multimedia Broadcast Multicast Service) information, and the method is used for acquiring MBMS information of different logical channels when applied in MAC (Media Access Control) PDU (Protocol Data Unit) bearing MBMS service data and signal contents. The method comprises the following steps of: receiving the MAC PDU which carries MAC header files, wherein the MAC header files at least comprise at least two LCIDs (Logical Channel Identifier), and the MAC PDU comprises at least two information packets respectively corresponding to at least two information carrier types; reading the first LCID; determining the first information carrier type corresponding to the first LCID; determining the first information packet corresponding to the first information carrier type according to the correspondence relation between the information carrier types and the information packets; and acquiring the MBMS information from the first information packet. The invention further discloses a device for realizing the method.

Description

A kind of method and device that obtains MBMS information
Technical field
The present invention relates to the communications field, particularly a kind of method and device that obtains MBMS information.
Background technology
In order to effectively utilize mobile network resource; Third generation partner program (3rd Generation Partnership Project; 3GPP) multimedia broadcasting and multicast service (MBMS) have been proposed; MBMS a kind ofly transmits the technology of data from a data source to a plurality of targets, has realized sharing of network (comprising core net and Access Network) resource, has improved the utilance of Internet resources (especially air interface resource).The MBMS of 3GPP definition not only can realize the classes of messages multicast and the broadcasting of plain text low rate; But also can realize broadcasting and the multicast that high-speed multimedia is professional; Multiple abundant multimedia service is provided; This has complied with the development trend of following mobile service undoubtedly, for the development of 3G provides better prospect.
In existing LTE (Long Term Evolution) technology; A plurality of logic channels are through the multiplexing MCH of following mode (Multicast Channel; Multicast Channel): in a TTI (Transmission Time Interval), can send a transmission data block (TB), the corresponding MAC PDU (medium access control layer protocol data cell) of each transmission data block.In a MAC PDU; Can comprise a plurality of MAC SDU (service data unit); These MAC SDU can be from the different logical channel; Possible logic channel comprises MTCH (Multicast Traffic Channel, multicast service channel), MCCH (Multicast Control Channel, multicast control channel) etc.After being serially connected in MAC PDU, these data from the Different Logic channel on physical channel, send together.
The application inventor finds to have following technical problem in the prior art in the process that realizes the application embodiment technical scheme at least: also do not confirm to be applied to carry at present the MAC PDU form of MBMS business datum and signaling content in the prior art.
Summary of the invention
The embodiment of the invention provides a kind of method and device of the MBMS of obtaining information, is used for obtaining the MBMS information on the Different Logic channel through the MAC PDU that is applied to carry MBMS business datum and signaling content.
A kind of method of obtaining multimedia broadcasting and multicast service MBMS information may further comprise the steps:
Receiving media access control layer Medium Access Control (MAC) Protocol Data Unit PDU; Carry the MAC header file among the said MAC PDU; At least include at least two Logic Channel Identifier LCID in the said MAC header file; Wherein, comprise at least two packets of information that correspond respectively at least two kinds of information carrier types among the said MAC PDU;
Read the LCID among said at least two LCID;
From said two kinds of information carrier types, confirm the first information bearer type corresponding at least with a said LCID;
Based on the corresponding relation of information carrier type and inter packet, from said two packets of information, confirm the first information bag corresponding at least with said first information bearer type;
From said first information bag, obtain MBMS information.
A kind of device that obtains MBMS information comprises:
Transmit-Receive Unit; Be used for receiving media access control layer Medium Access Control (MAC) Protocol Data Unit PDU; Carry the MAC header file among the said MACPDU; At least include at least two Logic Channel Identifier LCID in the said MAC header file, wherein, comprise at least two packets of information that correspond respectively at least two kinds of information carrier types among the said MAC PDU;
Confirm the unit; Be used for confirming the first information bearer type corresponding with a said LCID from said at least two kinds of information carrier types; Reach corresponding relation, from said two packets of information, confirm the first information bag corresponding at least with said first information bearer type based on information carrier type and inter packet;
Acquiring unit is used for reading the LCID of said at least two LCID, and from said first information bag, obtains MBMS information.
Through above-mentioned one or more technical schemes, the application has following technique effect at least:
Confirm the information carrier type according to the MAC header file that carries among the MAC PDU in the embodiment of the invention; Obtain MBMS information from be carried in the packets of information the said MAC PDU corresponding again with said information carrier type; Thereby realized obtaining the MBMS information on the Different Logic channel through the MACPDU that is applied to carry MBMS business datum and signaling content; So that when the multiplexing MCH channel of a plurality of logic channels, also can obtain the MBMS information in the Different Logic channel respectively, avoid confusion.
Description of drawings
Fig. 1 is for obtaining the primary structure figure of the device of MBMS information in the embodiment of the invention;
Fig. 2 A is MAC header file format sketch map when length field is 7 bits in the embodiment of the invention;
Fig. 2 B is MAC header file format sketch map when length field is 15 bits in the embodiment of the invention;
Fig. 3 is for obtaining the main method flow chart of MBMS information in the embodiment of the invention.
Embodiment
Confirm the information carrier type according to the MAC header file that carries among the MAC PDU in the embodiment of the invention; Obtain MBMS information from be carried in the packets of information the said MAC PDU corresponding again with said information carrier type; Thereby realized obtaining the MBMS information on the Different Logic channel through the MACPDU that is applied to carry MBMS business datum and signaling content; So that when the multiplexing MCH channel of a plurality of logic channels, also can obtain the MBMS information in a plurality of logic channels respectively, avoid confusion.
Referring to Fig. 1, the device that obtains MBMS information in the embodiment of the invention comprises transceiver module 101, determination module 102 and acquisition module 103.Concrete, device can be UE (subscriber equipment) described in the embodiment of the invention.
Transceiver module 101 is used to receive MAC PDU; Carry the MAC header file among the said MAC PDU; At least include at least two Logic Channel Identifier LCID in the said MAC header file, wherein, comprise at least two packets of information that correspond respectively at least two kinds of information carrier types among the said MAC PDU.A MAC header file can be comprised among the said MAC PDU, at least two MAC header files can be comprised in this MAC header file.Each MAC header file correspondence comes from the packets of information of an information carrier.
Determination module 102 is used for confirming the first information bearer type corresponding with a said LCID from said at least two kinds of information carrier types; Reach corresponding relation, from said two packets of information, confirm the first information bag corresponding at least with said first information bearer type based on information carrier type and inter packet.In the embodiment of the invention, the type of said information carrier can comprise MTCH, MCCH, MAC CE or fill bag etc.For example; Have two MAC header files in the MAC header file; Comprise a LCID in each MAC header file; Then determination module 102 is at first confirmed the pairing first information bearer type of a LCID in the MAC header file; And confirm the pairing first information bag of this first information bearer type, and notice acquisition module 103 obtains MBMS information from said first information bag, and determination module 102 continues to confirm the pairing second information carrier type of the 2nd LCID in the 2nd MAC header file afterwards.Perhaps; Determination module 102 can confirm successively that a LCID and the 2nd LCID in the 2nd MAC header file in the MAC header file distinguishes the corresponding first information bearer type and the second information carrier type; And confirm that the said first information bearer type and the second information carrier type distinguish the first information bag and second packets of information of correspondence, acquisition module 103 obtains MBMS information respectively from the said first information bag and second packets of information afterwards.
Referring to Fig. 2 A and Fig. 2 B, be the header file format of the MAC in the embodiment of the invention.Wherein Fig. 2 A representes that length field L is 7 bits, and Fig. 2 B representes that length field is 15 bits.Wherein Oct representes 8 bits.Field Definition in the embodiment of the invention in the MAC header file is following:
LCID: Logic Channel Identifier identifies the information carrier type corresponding with it.Preferable, LCID can occupy 7 bits, can confirm the type of the information carrier corresponding with it through the value of these 7 bits.Corresponding relation can be as shown in table 1.Wherein, MAC Control Element (MAC CE, MAC control element) be used to carry dynamic scheduling information (Dynamic Scheduling Infomation, DSI).Can know that through reading dynamic scheduling information MTCH is dispensed on which MBSFN (Multicast/Broadcast over Single Frequency Network; Single frequency network multicast broadcast) on the subframe; Thereby can on the corresponding MAC PDU of corresponding M BSFN subframe, read the corresponding information in package of MTCH that needs; And ignore the corresponding MAC PDU of MBSFN subframe that it need not read, thus improve the professional receiving efficiency of MBMS, save power consumption.Padding promptly fills bag.LCID is set to occupy 7 bits, and then it can represent 27-3=125 kind professional (deducting three kinds of values that are used to represent MCCH, MAC CE and Padding), can satisfy existing demand basically.The number of services of expression has surpassed 125 kinds if desired; Can the business with identical QoS (service quality) be divided into one group; The corresponding MCH of each different grouping; The LCID sign can be reused in different MCH, and promptly identical LCID value can be represented different business types in different MCH, can represent to surpass 125 kinds of business through a plurality of MCH like this.
Table 1
Figure BDA0000096963770000051
L: length field, the MAC SDU that sign is corresponding or the length of MAC control element.For MACSDU, length field has two types, and a kind of is 7bit, and a kind of is 15 bits.For the MAC control element, length field is 7bit.Length field can be used for representing the length of corresponding M AC SDU or MAC CE and in the position of MAC PDU.
F: format field is used to represent the size of length field.If the value of F is 0, the expression length field is 7 bits; If the value of F is 1, the expression length field is 15 bits.If the value of corresponding LCID is 0000001, the expression information carrier is MAC CE, and then the F field can be used as reserved field, and value is 0.
E: extension field, represent whether also have other MAC header files in this MAC header file.If the value of E is 0, being illustrated in the next byte is a MAC SDU, or a MAC control element, or fills bag; If the value of E is 1, is illustrated in the next byte and also has MAC header file.
Determination module 102 can be known the type of corresponding information carrier according to the value of the LCID field in the MAC header file.Determination module 102 can also be confirmed the particular location with this MAC header file information corresponding bag according to the value of L field in the MAC header file.Packets of information described in the embodiment of the invention can be different kinds of information bags such as MAC SDU, MAC CE, Padding.Wherein, the unit of MAC PDU generally is a byte, if its last byte can not be filled up data, then can replenish 0, promptly replenishes Padding, and the bit among the Padding is general complete to be 0.If comprise a plurality of MAC header files in the MAC header file, then determination module 102 can be successively confirm respectively with these a plurality of MAC header files in the corresponding information carrier type of LCID.
Acquisition module 103 is used for reading the LCID of said at least two LCID, and from said first information bag, obtains MBMS information.For example; Acquisition module 103 reads the MAC header file from the MACPDU that transceiver module 101 receives; Can comprise a plurality of MAC header files in this MAC header file; Determination module 102 confirms that the corresponding logical channel type of a MAC header file is MTCH; Then its corresponding packets of information is MAC SDU, and determination module 102 confirmed the particular location of corresponding M AC SDU in MAC PDU, and then the information confirmed according to determination module 102 of acquisition module 103 are obtained MBMS information in this corresponding M AC SDU.
The embodiment of the invention also provides a kind of system of the MBMS of obtaining information, and it comprises the device and the dispensing device of the said MBMS of obtaining information.
Dispensing device is used for sending MBMS information to the device of the said MBMS of obtaining information, and the information of MBMS described in the embodiment of the invention can be carried among the MAC PDU.Preferable, dispensing device described in the embodiment of the invention can be eNB (base station).
ENB can send MAC PDU to UE through system broadcast message; UE reads the content of MAC header file from this MAC PDU; The information that is comprised according to each MAC header file in the MAC header file is confirmed the type of its pairing information carrier; And confirm corresponding packets of information according to the type of said information carrier, from the packets of information of confirming, read MBMS information.
ENB can also be used for before UE transmitting system broadcast; Type according to information carrier; The LCID corresponding with each information carrier type is set respectively, and basis packets of information the position among MAC PDUs corresponding with each information carrier is provided with the value of L in the MAC header file in MAC header file.
Preferable, when setting up a MAC PDU, can MAC CE be arranged on the foremost, promptly, set gradually MCCH and MTCH then near the position of MAC header file, then replenish Padding if any the byte of not filling up.Because what carry among the MAC CE is dynamic scheduling information, even more important with respect to MCCH/MTCH, can be placed on the MCCH/MTCH front.But also can be provided with in proper order according to other not according to like this in proper order.When placing MAC header file, also can at first place sub-header file, and then set gradually MAC header file corresponding to MCCH and MTCH corresponding to MAC CE, perhaps also can be provided with in proper order according to other.Only otherwise break away from design philosophy of the present invention, be provided with all within protection scope of the present invention according to any order.
Referring to Fig. 3, the main method flow process of obtaining MBMS information in the embodiment of the invention is following:
Step 301: receiving media access control layer Medium Access Control (MAC) Protocol Data Unit PDU; Carry the MAC header file among the said MAC PDU; At least include at least two Logic Channel Identifier LCID in the said MAC header file; Wherein, comprise at least two packets of information that correspond respectively at least two kinds of information carrier types among the said MAC PDU.
Step 302: read the LCID among said at least two LCID.
Step 303: from said two kinds of information carrier types, confirm the first information bearer type corresponding at least with a said LCID.
Step 304:, from said two packets of information, confirm the first information bag corresponding at least with said first information bearer type based on the corresponding relation of information carrier type and inter packet.
Step 305: from said first information bag, obtain MBMS information.
Confirm the information carrier type according to the MAC header file that carries among the MAC PDU in the embodiment of the invention; Obtain MBMS information from be carried in the packets of information the said MAC PDU corresponding again with said information carrier type; Thereby realized obtaining MBMS information, so that when the multiplexing MCH channel of a plurality of logic channels, also can obtain the MBMS information in the Different Logic channel respectively through the MACPDU that is applied to carry MBMS business datum and signaling content.The embodiment of the invention is provided with the professional MAC header file format of a kind of MBMS of being applied to; Its LCID occupies 7 bits; The type that not only can represent information carrier; Can also represent 125 kinds of types of service, can not be confused, make data transmission procedure more reliable with the data that guarantee different service types.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1. a method of obtaining multimedia broadcasting and multicast service MBMS information is characterized in that, may further comprise the steps:
Receiving media access control layer Medium Access Control (MAC) Protocol Data Unit PDU; Carry the MAC header file among the said MAC PDU; At least include at least two Logic Channel Identifier LCID in the said MAC header file; Wherein, comprise at least two packets of information that correspond respectively at least two kinds of information carrier types among the said MAC PDU;
Read the LCID among said at least two LCID;
From said two kinds of information carrier types, confirm the first information bearer type corresponding at least with a said LCID;
Based on the corresponding relation of information carrier type and inter packet, from said two packets of information, confirm the first information bag corresponding at least with said first information bearer type;
From said first information bag, obtain MBMS information.
2. the method for claim 1 is characterized in that, comprises at least two MAC header files in the said MAC header file, includes a LCID among said at least two LCID in each MAC header file.
3. method as claimed in claim 2 is characterized in that, confirms that the step of the first information bearer type corresponding with a said LCID comprises: the corresponding first information bearer type of a LCID in definite and the said MAC header file.
4. method as claimed in claim 3 is characterized in that, the bit number of said LCID is 7.
5. method as claimed in claim 4 is characterized in that:
When the bit value of a said LCID was 0000000, said first information bearer type was specially multicast control channel MCCH; Or
When a said LCID value was 0000001, said first information bearer type was specially the MAC control element; Or
When a said LCID value was [0000010,1111110], said first information bearer type was specially multicast service channel MTCH; Or
When a said LCID value was 1111111, said first information bearer type is specially filled bag.
6. a device that obtains MBMS information is characterized in that, comprising:
Transceiver module; Be used for receiving media access control layer Medium Access Control (MAC) Protocol Data Unit PDU; Carry the MAC header file among the said MACPDU; At least include at least two Logic Channel Identifier LCID in the said MAC header file, wherein, comprise at least two packets of information that correspond respectively at least two kinds of information carrier types among the said MAC PDU;
Determination module; Be used for confirming the first information bearer type corresponding with a said LCID from said at least two kinds of information carrier types; Reach corresponding relation, from said two packets of information, confirm the first information bag corresponding at least with said first information bearer type based on information carrier type and inter packet;
Acquisition module is used for reading the LCID of said at least two LCID, and from said first information bag, obtains MBMS information.
7. device as claimed in claim 6 is characterized in that, comprises at least two MAC header files in the said MAC header file, includes a LCID among said at least two LCID in each MAC header file.
8. device as claimed in claim 7 is characterized in that, said determination module specifically is used for confirming the first information bearer type corresponding with a LCID of a said MAC header file.
9. device as claimed in claim 8 is characterized in that, the bit number of said LCID is 7.
10. device as claimed in claim 9 is characterized in that,
When the bit value of a said LCID was 0000000, said first information bearer type was specially multicast control channel MCCH; Or
When a said LCID value was 0000001, said first information bearer type was specially the MAC control element; Or
When a said LCID value was [0000010,1111110], said first information bearer type was specially multicast service channel MTCH; Or
When a said LCID value was 1111111, said first information bearer type is specially filled bag.
CN201110302243A 2011-09-29 2011-09-29 Method and device for acquiring MBMS (Multimedia Broadcast Multicast Service) information Pending CN102333281A (en)

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WO2018028562A1 (en) * 2016-08-09 2018-02-15 夏普株式会社 User equipment, base station and related method

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