CN102624490A - Method, device and system for information transmission and subscriber equipment - Google Patents
Method, device and system for information transmission and subscriber equipment Download PDFInfo
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- CN102624490A CN102624490A CN2012100847818A CN201210084781A CN102624490A CN 102624490 A CN102624490 A CN 102624490A CN 2012100847818 A CN2012100847818 A CN 2012100847818A CN 201210084781 A CN201210084781 A CN 201210084781A CN 102624490 A CN102624490 A CN 102624490A
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Abstract
An embodiment of the invention discloses a method, a device and a system for information transmission and subscriber equipment. The method for information transmission includes that flexible subframe attribute information is determined by a base station, and the determined flexible subframe attribute is transmitted to the subscriber equipment via a PMCH (physical multicast channel) by the base station. As the changed flexible subframe attribute information is transmitted to the subscriber equipment via the PMCH by the base station, the data transmission between the subscriber equipment and the base station can be achieved according to the flexible subframe attribute, and the resource consumption and the complexity of the information transmission can be reduced. The method, the device, the system for information transmission and the subscriber equipment are applicable to the communication system field.
Description
Technical field
The present invention relates to field of wireless communications, particularly a kind of information transferring method, device, system and subscriber equipment.
Background technology
In the GSM, two kinds of basic duplex modes are arranged, time division duplex (TDD, Time Division Duplex) and FDD (FDD, Frequency Division Duplex).The TDD mode be meant up link (UL, Uplink) and down link (DL Downlink) uses identical frequency band, on different time intervals, carries out the transmission of uplink and downlink signals.
In LTE (Long Term Evolution) the TDD system, each is wireless frame length 10ms comprises 10 sub-frame, and each subframe lengths is 1ms.According to the difference configuration, uplink downlink uses the different subframes of same frequency to carry out transfer of data respectively.In order to adapt to different application scenes, LTE TDD system can change ratio of uplink subframe to downlink subframe (Uplink-Downlink Configuration), to satisfy different up-downgoing non-symmetrical service demands according to state of affairs.
In the LTE TDD system, the distribution of uplink and downlink subframe is static or semi-static configuration, can not dynamically change, and such way is comparatively effectively simple under the big covering scene of macrocell.But among a small circle in the cell covered, number of users is less at Microcell, Home eNodeB etc., and business demand changes faster, and ratio of uplink subframe to downlink subframe and up-downgoing traffic carrying capacity do not match usually, and causing can not efficent use of resources.Be head it off; LTE Rel-11 (version 11) introduces dynamic flexible subframe proportioning notion; Promptly dispose some flexible sub-frame (flexible subframe); Each flexible sub-frame can dynamically be configured to sub-frame of uplink or descending sub frame, and flexible sub-frame number and position can change as required.
Exist in the TDD system of flexible sub-frame, the base station can dynamically change the flexible sub-frame attribute according to service conditions, promptly is sub-frame of uplink or descending sub frame.But when the base station has changed the attribute of flexible sub-frame; Subscriber equipment can't obtain the flexible sub-frame attribute of the current correspondence of data that receives; Thereby cause subscriber equipment to handle the data that receive, finally cause base station and the subscriber equipment can't proper communication according to the flexible sub-frame attribute of the current correspondence of data.
Summary of the invention
The embodiment of the invention provides a kind of information transferring method, device, system and subscriber equipment, the flexible sub-frame attribute information after in time notifying user equipment changes after the base station changes the flexible sub-frame attribute, and resource overhead is few, and processing complexity is low.
One aspect of the present invention comprises a kind of information transferring method, comprising:
The flexible sub-frame attribute is confirmed in the base station;
First message is sent to user equipment (UE) in the base station, and first message is carried the flexible sub-frame attribute.
One aspect of the present invention comprises another kind of information transferring method, comprising:
User equipment (UE) receives first message that send the base station, and first message is carried the flexible sub-frame attribute of base station configuration;
UE carries out transfer of data according to flexible sub-frame configuration information that carries in the first information and base station.
The present invention comprises a kind of information carrying means on the other hand, comprising:
Confirm the unit, be used for confirming the flexible sub-frame attribute;
Transmitting element is used for sending first message to user equipment (UE), and first message is carried the flexible sub-frame attribute.
The present invention comprises a kind of subscriber equipment on the other hand, comprising:
Receiving element is used to receive first message that send the base station, and first message is carried the flexible sub-frame attribute of base station configuration;
Transmission unit, transfer of data is carried out in the flexible sub-frame configuration information and the base station that are used for carrying according to the first information.
Further aspect of the present invention comprises a kind of transmission of Information system, comprising: subscriber equipment and base station.
After the information transferring method that the embodiment of the invention provides, device, system and subscriber equipment, base station are confirmed the flexible sub-frame attribute information, send the flexible sub-frame attribute of confirming to subscriber equipment through Physical Multicast Channel PMCH.In the embodiment of the invention; Flexible sub-frame attribute information after the base station will change through Physical Multicast Channel sends to subscriber equipment; Remedied blank of the prior art, and method, device, system and resources for user equipment expense that the embodiment of the invention provides are little, processing complexity is low.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of information transferring method flow chart that Fig. 1 provides for the embodiment of the invention;
A kind of information carrying means structural representation that Fig. 2 provides for the embodiment of the invention;
The another kind of information transferring method flow chart that Fig. 3 provides for the embodiment of the invention;
A kind of user device architecture sketch map that Fig. 4 provides for the embodiment of the invention;
The transmission of Information system configuration sketch map that Fig. 5 provides for the embodiment of the invention;
Fig. 6 controls the cell format sketch map for the media access control layer of the newly-increased indication flexible sub-frame attribute that the embodiment of the invention provides;
Fig. 7 controls the cell format sketch map for the media access control layer of the amended indication flexible sub-frame attribute that the embodiment of the invention provides.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making all other embodiment that obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
For the advantage that makes technical scheme of the present invention is clearer, the present invention is elaborated below in conjunction with accompanying drawing and embodiment.
The embodiment of the invention provides a kind of information transferring method, and is as shown in Figure 1, and said method comprises:
101, the flexible sub-frame attribute is confirmed in the base station.
Wherein, a flexible sub-frame can dynamically be configured to sub-frame of uplink or descending sub frame according to business demand, and flexible sub-frame number and position can change as required.
Particularly, the base station can be according to business demand dynamic-configuration flexible sub-frame attribute.
For example, in the LTE TDD system, radio frames has two big types, and the repetition period of one type of radio frames is 5ms, and the repetition period of another kind of radio frames is 10ms.For the repetition period be the radio frames of 5ms, subframe 0 and 5 is confirmed as descending sub frame, subframe 1 and 6 is confirmed as special subframe, subframe 2 is confirmed as sub-frame of uplink, all the other subframes 3,4,7,8 and 9 can be configured to flexible sub-frame, flexible sub-frame can dispose 5 at most; For the repetition period be the radio frames of 10ms, subframe 0 is confirmed as descending sub frame, subframe 1 is confirmed as special subframe, subframe 2 is confirmed as sub-frame of uplink, flexible sub-frame can dispose 7 at most, is respectively 3,4,5,6,7,8 and 9.The attribute of each flexible sub-frame can be confirmed according to the current business situation in the base station through certain algorithm.The attribute of each flexible sub-frame can be indicated with 1 bit information, 0 expression descending sub frame, 1 expression sub-frame of uplink.
102, first message is sent to user equipment (UE) in the base station, and first message is carried the flexible sub-frame attribute.
Particularly, the base station can be sent at Physical Multicast Channel PMCH first message bearing to UE.
The embodiment of the invention provides first message bearing at Physical Multicast Channel PMCH to the concrete grammar that UE sends further, comprising:
When cell is controlled when subscriber equipment sends the flexible sub-frame attribute information after disposing through the media access control layer of media access control layer protocol Data Unit in the base station; Can confirm in existing MAC CE that the second preset bit is used to indicate the flexible sub-frame attribute; A kind of new media access control layer control cell promptly is set indicates the flexible sub-frame attribute information; As shown in Figure 6; New media access control layer control cell has 8 bits of regular length, and first bit is as reservation bit, and 7 bits of back are indicated the attribute of each flexible sub-frame respectively.Because the maximum flexible sub-frame number of supporting in the LTE TDD system is 7, therefore indicate with 7 bits here.When the flexible sub-frame number of system configuration less than 7 the time, unnecessary bit is invalid.For example: current system configuration 5 flexible sub-frame, it is significant having only preceding 5 bits so, is used to indicate the attribute of 5 flexible sub-frame, 2 unnecessary bits are used as invalid information, have no meaning.
Replacedly; Pass through the media access control layer of media access control layer protocol Data Unit when the base station and control cell when subscriber equipment sends the flexible sub-frame attribute information after disposing, can also preset the bit spy from the middle increase by first of the MSI the existing media access control layer control unit form (MCH Scheduling Information, Multicast Channel schedule information) and indicate the flexible sub-frame attribute information; As shown in Figure 7; For example, in the existing media access control layer control cell format, the Multicast Channel schedule information is a variable-length; Can be used to indicate the flexible sub-frame attribute in the information of its beginning or a 8bit of end increase.
Replacedly, when the base station through the flexible sub-frame attribute is carried on multicast control channel MCCH when subscriber equipment sends, can relate to the flexible sub-frame attribute that a kind of new message format indication is sent to subscriber equipment.Perhaps signaling IE of configuration indicates the flexible sub-frame attribute that sends to subscriber equipment in multicast control channel message, and the form length that increases behind the IE is 8 bits, and form is:
Perhaps in multicast control channel message, need the flexible sub-frame attribute of transmission through the reserved field indication, particularly, utilize lateNonCriticalExtension field in the multimedia broadcasting SFN to indicate the attribute of flexible sub-frame.The bit number that the concrete reservation bit number that uses needs as the indication of flexible sub-frame attribute.
Replacedly, the base station can be sent to subscriber equipment through the flexible sub-frame attribute being carried on multicast service channel MTCH.
Wherein, the multicast service channel is a kind of logic channel, is used for the transmitting multimedia broadcast multicast business, is mapped on the Multicast Channel, finally is mapped on the physical channel Physical Multicast Channel to send.
In the LTE system, the corresponding multicast service channel of each multimedia broadcast multi-broadcasting business.For example, for video request program, the different different multimedia broadcast multi-broadcasting business of video frequency program representative, the corresponding multicast service channel of each program.Based on this, also as a kind of special multimedia broadcast multi-broadcasting business, distribute a multicast service channel corresponding with it the flexible sub-frame attribute, the flexible sub-frame attribute that is about to dynamically change can fast notification arrive subscriber equipment.
The transmission of every kind of multimedia broadcast multi-broadcasting business is controlled by MSI (Multicast Channel scheduling); Can dispatch the flexible sub-frame attribute information through MSI;, sends the flexible sub-frame attribute flexible sub-frame attribute after upgrading when upgrading; Do not have the time of renewal just not send, so can avoid the waste of resource yet.
The embodiment of the invention provides a kind of information carrying means, and the entity of said device can be the base station, and is as shown in Figure 2, and said device comprises: confirm unit 21, transmitting element 22.
Confirm unit 21, be used for confirming the flexible sub-frame attribute.
Particularly, confirm that unit 21 can be according to business demand dynamic-configuration flexible sub-frame attribute information.
For example, in the LTE TDD system, radio frames has two big types, and the repetition period of one type of radio frames is 5ms, and the repetition period of another kind of radio frames is 10ms.For the repetition period be the radio frames of 5ms, subframe 0 and 5 is confirmed as descending sub frame, subframe 1 and 6 is confirmed as special subframe, subframe 2 is confirmed as sub-frame of uplink, all the other subframes 3,4,7,8 and 9 can be configured to flexible sub-frame, flexible sub-frame can dispose 5 at most; For the repetition period be the radio frames of 10ms, subframe 0 is confirmed as descending sub frame, subframe 1 is confirmed as special subframe, subframe 2 is confirmed as sub-frame of uplink, flexible sub-frame can dispose 7 at most, is respectively 3,4,5,6,7,8 and 9.The attribute of each flexible sub-frame can be confirmed according to the current business situation in the base station through certain algorithm.The attribute of each flexible sub-frame can be indicated with 1 bit information, 0 expression descending sub frame, 1 expression sub-frame of uplink.
Transmitting element 22 is used for sending first message to user equipment (UE), and first message is carried the flexible sub-frame attribute of confirming that unit 21 is confirmed.
Transmitting element 22 specifically can be used for first message bearing is sent to UE at Physical Multicast Channel PMCH.
Transmitting element 22 can comprise further: the first transmission subelement 2201, second sends subelement 2202, the 3rd transmission subelement the 2203, the 4th sends subelement the 2204, the 5th and sends subelement 2205.
First sends subelement 2201, is used in the Multicast Channel schedule information MSI of existing MAC CE, increasing by the first preset bit, and first message bearing is sent to UE in the first preset bit.
Second sends subelement 2202, is used for confirming the second preset bit at existing MAC CE, and first message bearing is sent to UE in the second preset bit.
The 3rd sends subelement 2203, and the cell that is used for first message is carried at MCCH message sends to UE.
The 4th sends subelement 2204, and the reserved field that is used for first message is carried at MCCH message sends to UE.
The 5th sends subelement 2205, is used for sending to UE through being carried on multicast control channel MCCH at the flexible sub-frame attribute that the reserved field of MCCH message is indicated.
Transmitting element 22 can be used for through first message bearing is sent to UE at multicast control channel MCCH further.
Transmitting element 22 can be used for through first message bearing is sent to UE at multicast service channel MTCH further.
The embodiment of the invention provides another kind of information transferring method, and is as shown in Figure 3, and said method comprises:
301, user equipment (UE) receives first message that send the base station, and first message is carried the flexible sub-frame attribute of base station configuration.
302, subscriber equipment carries out the transmission of data according to the flexible sub-frame configuration information that carries in the first information with the base station.
The embodiment of the invention provides UE to receive the concrete grammar of first message of sending the base station further, comprising:
UE receives the first information of base station through the media access control layer control cell MAC CE transmission of media access control layer protocol Data Unit MAC PDU.
Replacedly, UE receives the first information that send through multicast control channel MCCH the base station.
Replacedly, UE receives the first information that send through multicast service channel MTCH the base station.
The embodiment of the invention provides subscriber equipment according to the flexible sub-frame configuration information that carries in the first information further, and the concrete grammar with the transmission of data is carried out in the base station comprises:
When flexible sub-frame configuration information indication flexible sub-frame was sub-frame of uplink, subscriber equipment sent data to the base station.
Replacedly, when flexible sub-frame configuration information indication flexible sub-frame was descending sub frame, subscriber equipment received the data that send the base station.
The embodiment of the invention provides a kind of subscriber equipment, and is as shown in Figure 4, and said subscriber equipment comprises: receiving element 41, transmission unit 42.
Receiving element 41 is used to receive first message that send the base station, and first message is carried the flexible sub-frame attribute of base station configuration.
Transmission unit 42, transfer of data is carried out in the flexible sub-frame configuration information and the base station that are used for carrying according to the first information.
The receiving element 41 that the embodiment of the invention provides can comprise further: first receives subelement 4101, second receives subelement 4102, the 3rd reception subelement 4103.
First receives subelement 4101, is used to receive the first information of base station through the media access control layer control cell MAC CE transmission of media access control layer protocol Data Unit MACPDU.
Second receives subelement 4102, is used to receive the first information that send through multicast control channel MCCH the base station.
The 3rd receives subelement 4103, is used to receive the first information that send through multicast service channel MTCH the base station.
The transmission unit 42 that the embodiment of the invention provides can comprise further: send subelement 4201, receive subelement 4202.
Send subelement 4201, be used for when flexible sub-frame configuration information indication flexible sub-frame is sub-frame of uplink, sending data to the base station.
Receive subelement 4202, be used for when flexible sub-frame configuration information indication flexible sub-frame is descending sub frame, receiving the data that send the base station.
The embodiment of the invention a kind of transmission of Information system is provided, as shown in Figure 5, said system comprises: base station 51 and subscriber equipment 52.
In the transmission of Information system that the embodiment of the invention provides; When base station 51 has changed the attribute of flexible sub-frame; Meeting notifying user equipment 52; Thereby the flexible sub-frame configuration information that subscriber equipment 52 carries in can the attribute according to the flexible sub-frame that receives in the reception or the transmission of the enterprising line data of said flexible sub-frame, thereby has guaranteed that base station 51 and said subscriber equipment 52 can carry out proper communication.
After the information transferring method that the embodiment of the invention provides, device, system and subscriber equipment, base station are confirmed the flexible sub-frame attribute information,, sends the flexible sub-frame attribute to subscriber equipment through being carried on Physical Multicast Channel PMCH.In the embodiment of the invention; Flexible sub-frame attribute information after the base station will change through Physical Multicast Channel sends to subscriber equipment; Remedied blank of the prior art, and method, device, system and resources for user equipment expense that the embodiment of the invention provides are little, processing complexity is low.
The information carrying means that the embodiment of the invention provides can be realized the above-mentioned method embodiment that provides, and concrete function is realized seeing also the explanation among the method embodiment, repeats no more at this.The information transferring method that the embodiment of the invention provides, device, system and subscriber equipment go for field of wireless communications, but are not limited only to this.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through computer program; Described program can be stored in the computer read/write memory medium; This program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (22)
1. an information transferring method is characterized in that, comprising:
The flexible sub-frame attribute is confirmed in the base station;
First message is sent to user equipment (UE) in said base station, and said first message is carried said flexible sub-frame attribute.
2. information transferring method according to claim 1 is characterized in that, first message is sent to UE in said base station, specifically comprises:
Send at Physical Multicast Channel PMCH said first message bearing said base station to said UE.
3. information transferring method according to claim 2 is characterized in that, send at PMCH said first message bearing said base station to said UE, specifically comprise:
Send at the media access control layer control cell MAC of media access control layer protocol Data Unit MAC PDU CE said first message bearing said base station to said UE.
4. information transferring method according to claim 3 is characterized in that, increases by the first preset bit among the Multicast Channel schedule information MS I of said base station in existing MAC CE and is used to indicate the flexible sub-frame attribute,
Send at the MAC of MAC PDU CE said first message bearing said base station to said UE, specifically comprise:
Send said first message bearing in the said first preset bit said base station to said UE; Perhaps
Said base station confirms that in existing MAC CE the second preset bit is used to indicate the flexible sub-frame attribute,
Send at the MAC of MAC PDU CE said first message bearing said base station to said UE, specifically comprise:
Send said first message bearing in the said second preset bit said base station to said UE.
5. information transferring method according to claim 2 is characterized in that, send at PMCH said first message bearing said base station to said UE, specifically comprise:
Said base station is through sending at multicast control channel MCCH said first message bearing to said UE.
6. information transferring method according to claim 5 is characterized in that, said base station specifically comprises through said first message bearing is sent to said UE at MCCH:
Said base station is carried at said first message in the cell of said MCCH message and sends to said UE; Perhaps
Said base station is carried at said first message in the reserved field of said MCCH message and sends to said UE; Perhaps
Said base station directly is carried on said first message in the said MCCH message and sends to said UE.
7. information transferring method according to claim 2 is characterized in that, said base station is sent at PMCH said first message bearing and comprised to said UE:
Said base station is through sending at multicast service channel MTCH said first message bearing to said UE.
8. an information carrying means is characterized in that, comprising:
Confirm the unit, be used for confirming the flexible sub-frame attribute;
Transmitting element is used for sending first message to user equipment (UE), and said first message is carried said flexible sub-frame attribute.
9. information carrying means according to claim 8 is characterized in that,
Said transmitting element specifically is used for said first message bearing is sent to said UE at Physical Multicast Channel PMCH.
10. information carrying means according to claim 9 is characterized in that,
Said transmitting element is further used for said first message bearing is sent to said UE at the media access control layer control cell MAC of media access control layer protocol Data Unit MAC PDU CE.
11. information carrying means according to claim 10 is characterized in that, said transmitting element comprises that first sends subelement, or second sends subelement;
Said first sends subelement, is used in the Multicast Channel schedule information MSI of existing MAC CE, increasing by the first preset bit, and said first message bearing is sent to said UE in the said first preset bit;
Said second sends subelement, is used for confirming the second preset bit at existing MAC CE, and said first message bearing is sent to said UE in the said second preset bit.
12. information carrying means according to claim 9 is characterized in that,
Said transmitting element is further used for through said first message bearing is sent to said UE at multicast control channel MCCH.
13. information carrying means according to claim 12 is characterized in that, said transmitting element comprises that the 3rd sends subelement, or the 4th transmission subelement, or the 5th sends subelement;
The said the 3rd sends subelement, and the cell that is used for said first message is carried at said MCCH message sends to said UE;
The said the 4th sends subelement, and the reserved field that is used for said first message is carried at said MCCH message sends to said UE;
The said the 5th sends subelement, is used for that said first message directly is carried on said MCCH message and sends to said UE.
14. information carrying means according to claim 9 is characterized in that,
Said transmitting element is further used for through said first message bearing is sent to said UE at multicast service channel MTCH.
15. each described information carrying means is characterized in that according to Claim 8-14, said information carrying means is the base station.
16. an information transferring method is characterized in that, comprising:
User equipment (UE) receives first message that send the base station, and said first message is carried the flexible sub-frame attribute of said base station configuration;
Said UE carries out transfer of data according to flexible sub-frame configuration information that carries in the said first information and said base station.
17. information transferring method according to claim 16 is characterized in that, comprising:
Said UE receives the said first information of said base station through the media access control layer control cell MAC CE transmission of media access control layer protocol Data Unit MAC PDU; Perhaps
Said UE receives the said first information that send through multicast control channel MCCH said base station; Perhaps
Said UE receives the said first information that send through multicast service channel MTCH said base station.
18. information transferring method according to claim 16 is characterized in that, said UE carries out transfer of data according to flexible sub-frame configuration information that carries in the said first information and said base station, comprising:
When said flexible sub-frame configuration information indicated said flexible sub-frame to be sub-frame of uplink, said subscriber equipment sent data to said base station; Perhaps
When said flexible sub-frame configuration information indicated said flexible sub-frame to be descending sub frame, said subscriber equipment received the data that send said base station.
19. a subscriber equipment is characterized in that, comprising:
Receiving element is used to receive first message that send the base station, and said first message is carried the flexible sub-frame attribute of said base station configuration;
Transmission unit, transfer of data is carried out in the flexible sub-frame configuration information and the said base station that are used for carrying according to the said first information.
20. subscriber equipment according to claim 19 is characterized in that, said receiving element comprises that first receives subelement, or the second reception subelement, or the 3rd receives subelement;
Said first receives subelement, is used to receive the said first information of said base station through the media access control layer control cell MAC CE transmission of media access control layer protocol Data Unit MAC PDU;
Said second receives subelement, is used to receive the said first information that send through multicast control channel MCCH said base station;
The said the 3rd receives subelement, is used to receive the said first information that send through multicast service channel MTCH said base station.
21. subscriber equipment according to claim 19 is characterized in that, said transmission unit comprises: send subelement, and/or receive subelement;
Send subelement, be used for when said flexible sub-frame configuration information indicates said flexible sub-frame to be sub-frame of uplink, send data to said base station;
Receive subelement, be used for when said flexible sub-frame configuration information indicates said flexible sub-frame to be descending sub frame, receive the data that send said base station.
22. a transmission of Information system is characterized in that, comprising: each described subscriber equipment among each described information carrying means and the claim 19-21, said information carrying means and said user device transmissions data message among the claim 8-15.
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| CN104904257A (en) * | 2013-01-01 | 2015-09-09 | Lg电子株式会社 | Method for monitoring downlink control channel in wireless communication system and device for same |
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