CN101998270A - Method and device for notifying multimedia broadcast multicast service (MBMS) - Google Patents
Method and device for notifying multimedia broadcast multicast service (MBMS) Download PDFInfo
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Abstract
The invention provides a method and device for notifying multimedia broadcast multicast service (MBMS). The method comprises the following steps: an evolved Node B (eNB) configures a preset MCCH notification radio network temporary identity (M-RNTI) for user equipment (UE); and the eNB scrambles cyclic redundancy check (CRC), which carries downlink control information (DCI) format 3/3A of an MBMS control channel (MCCH) notification, by using the M-RNTI, and transmits the scrambled DCI format 3/3A to the UE. The invention has the advantages that the original system is slightly improved, the complexity of the MCCH notification is lowered, the utilization ratio of the public search space and channel resources is increased, therefore, the problem of low resource utilization ratio in the MBMS notification method in the correlation techniques is solved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of multimedia broadcast multi-broadcasting business Notification Method and device.
Background technology
Along with the fast development of Internet and popularizing of large-screen Multi-featured Mobile Terminal, a large amount of mobile data multimedia services and various high bandwidth multimedia service have appearred, as video conference, television broadcasting, video request program, advertisement, online education, interactive game etc., this has satisfied the multiple services demand of mobile subscriber on the one hand, has also brought new business growth point for mobile operator simultaneously.These mobile data multimedia services require a plurality of users can receive identical data simultaneously, compare with general data service, have characteristics such as data volume is big, longer duration, delay sensitive.
In order to effectively utilize mobile network resource, third generation partner program 3GPP (3rd Generation Partnership Project) has proposed MBMS (Multimedia Broadcast Multicast Service, multimedia broadcast multi-broadcasting business), this business is a kind of technology that transmits data from a data source to a plurality of destination mobile terminals, realize sharing of network (comprising core net and Access Network) resource, 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 the broadcasting and the multicast of high-speed multimedia business, multiple rich video, audio frequency and multimedia service are provided, this has complied with the trend of following mobile data development undoubtedly, for the development of 3G provides better professional prospect.
In Long Term Evolution LTE (Long Term Evolution) system, as MCCH (MBMS Control Channel, in when, change taking place the multimedia broadcast multi-broadcasting business control channel), the Node B of evolution (evolved Node B, eNB) need inform that all terminal UE (User Equipment) MCCH changes by informing mechanism, make UE upgrade its corresponding M CCH, keep content and the eNB of MCCH synchronous.
Downlink physical control signaling bear is on physical downlink control channel PDCCH (Physical Downlink Control Channel) in the 3GPP LTE system, and the descending symbolic number that PDCCH comprised is indicated by Physical Control Format Indicator Channel PCFICH (Physical control format indication channel).PDCCH is used to transmit DCI, and the form DCI format of Downlink Control Information comprises format 0, format 1, format 1A, format1B, format 1C, format 1D, format 3, format 3A etc., is used to transmit different classes of DCI.Every kind of all subsidiary CRC that 16 bits are arranged of DCI signaling format, each CRC all can be by the corresponding Radio Network Temporary Identifier RNTI of implicit coded system, just by with RNTI CRC being carried out scrambling, terminal is carried out blind Detecting according to RNTI to CRC then, obtains its DCI.
A kind of MBMS Notification Method is provided in the correlation technique, this method is by redefining DCI (Downlink Control Information, Downlink Control Information) realizes the information of notifying terminal MCCH to change, specifically can be divided into following steps: at first need define new DCI message, and give certain implication for the bit in the DCI message of redetermination in physical layer; Secondly when change takes place in MCCH, send this DCI message in the common search space of subframe, and with M-RNTI (MCCH notification Radio Network Temporary Identity, multimedia broadcast multi-broadcasting business control channel change message Radio Network Temporary Identifier) scrambling is to the CRC (Cyclic Redundancy Check, cyclic redundancy check) of this DCI message; UE is by receiving the common search space of this subframe once more, this DCI message of blind check, know that by M-RNTI this DCI message is notice MCCH change message (MCCH notification), and know more detailed MCCH modification information by the particular content in the DCI message; Last UE receives the MCCH that has changed.
MBMS Notification Method in the correlation technique needs to define DCI message in physical layer again, and is bigger to the original process change of system, and complexity is higher; The DCI message of redetermination exists the back to incompatible shortcoming; Can cause inadequate resource for the DCI message that sends redetermination in limited common search space, influence original DCI message that on the common search space, sends.
In view of this, the present invention provides a kind of MBMS Notification Method and device, realizes the MCCH Notification of Changes by continuing to use original DCI message Format 3/3A.
Summary of the invention
The present invention aims to provide a kind of MBMS Notification Method and device, and the MBMS Notification Method that can solve in the correlation technique needs to define DCI message in physical layer again, and is bigger to the original process change of system, and complexity is higher; The DCI message of redetermination exists the back to incompatible shortcoming; Can cause inadequate resource for the DCI message that sends redetermination in limited common search space, influence the problem of original DCI message that on the common search space, sends.
To achieve these goals, according to an aspect of the present invention, a kind of multimedia broadcast multi-broadcasting business Notification Method is provided, has may further comprise the steps: eNB is the multimedia broadcast multi-broadcasting business control channel change message Radio Network Temporary Identifier M-RNTI that one group of terminal configuration is made an appointment; ENB uses above-mentioned M-RNTI that the cyclic redundancy check of the Downlink Control Information DCI format 3/3A that carries multimedia broadcast multi-broadcasting business control channel MCCH change message is carried out scrambling, and the DCI format 3/3A after terminal sends scrambling.
Preferably, in above-mentioned Notification Method, eNB is that one group of terminal configuration specifically comprises with the M-RNTI that makes an appointment: eNB and terminal fixedly install a RNTI value and are M-RNTI; Above-mentioned M-RNTI is shared by the power control Radio Network Temporary Identifier TPC-RNTI of DCI format 3/3A simultaneously, and TPC-RNTI comprises Physical Uplink Control Channel power control Radio Network Temporary Identifier TPC-PUCCH-RNTI and Physical Uplink Shared Channel power control Radio Network Temporary Identifier TPC-PUSCH-RNTI.
Preferably, in above-mentioned Notification Method, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFFDh.
Preferably, in above-mentioned Notification Method, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFF3h.
Preferably, in above-mentioned Notification Method, P bit among the DCI format 3/3A is used to carry MCCH change message.
Preferably, in above-mentioned Notification Method, use above-mentioned M-RNTI that the cyclic redundancy check of the DCI format 3/3A that carries MCCH change message is carried out scrambling at eNB, and after the DCI format 3/3A after terminal sends scrambling, also comprise: terminal obtains DCI format 3/3A according to above-mentioned M-RNTI, and read P bit among the DCI format 3/3A, obtain MCCH change message.
Preferably, in above-mentioned Notification Method, also comprise before the DCIformat 3/3A after sending scrambling to terminal: the bit parameter that eNB is provided with MCCH change message is P, and the P value is informed terminal.
To achieve these goals, according to a further aspect in the invention, provide a kind of multimedia broadcast multi-broadcasting business notifying device, having comprised: configuration module, being used for eNB is one group of M-RNTI that terminal configuration is made an appointment; Sending module is used for eNB and uses above-mentioned M-RNTI that the cyclic redundancy check that carries out of the Downlink Control Information DCI format 3/3A that carries MCCH change message is carried out scrambling, and the DCI format 3/3A after terminal sends scrambling.
Preferably, in above-mentioned notifying device, configuration module specifically comprises: the M-RNTI configuration module, be used for eNB and terminal and fixedly install a RNTI value for M-RNTI, this M-RNTI is shared by the power control Radio Network Temporary Identifier TPC-RNTI of DCI format 3/3A simultaneously, and TPC-RNTI comprises Physical Uplink Control Channel power control Radio Network Temporary Identifier TPC-PUCCH-RNTI and Physical Uplink Shared Channel power control Radio Network Temporary Identifier TPC-PUSCH-RNTI.
Preferably, in above-mentioned notifying device, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFFDh.
Preferably, in above-mentioned notifying device, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFF3h.
Preferably, in above-mentioned notifying device, P bit among the DCI format 3/3A is used to carry MCCH change message.
Preferably, above-mentioned notifying device also comprises: read module, and be used for terminal and obtain DCI format 3/3A, and read P bit among the DCI format 3/3A according to above-mentioned M-RNTI, obtain MCCH change message.
Preferably, above-mentioned notifying device also comprises: the P value is provided with module, and being used for the bit parameter that eNB is provided with MCCH change message is P, and the P value is informed terminal.
The foregoing description is continued to use original DCI message format 3/3A and is realized the MCCH Notification of Changes, owing to need not to redefine new DCI message in physical layer, also need not to take more common search space in order to send the DCI message of redetermination, so it is less to the change of original system, reduced complexity, and common search space and utilization rate of channel resources have been improved, so having overcome the MBMS Notification Method in the correlation technique needs again in physical layer definition DCI message, bigger to the original process change of system, and complexity is higher; The DCI message of redetermination exists the back to incompatible shortcoming; Can cause inadequate resource for the DCI message that sends redetermination in limited common search space, influence the problem of original DCI message that on the common search space, sends.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart according to the Notification Method of first embodiment of the invention;
Fig. 2 shows the schematic diagram of DCI format 3;
Fig. 3 shows the schematic diagram of DCI format 3A;
Fig. 4 shows and utilizes DCI format 3 carrying MCCH notification schematic diagrames;
Fig. 5 shows and utilizes DCI format 3A carrying MCCH notification schematic diagram;
Fig. 6 shows the structure chart according to the notifying device of fourth embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
First embodiment
Fig. 1 shows the flow chart according to the Notification Method of first embodiment of the invention, and this method may further comprise the steps:
Step S102, the Node B of evolution (evolved Node B abbreviates eNB as) is one group of M-RNTI that the UE configuration is made an appointment;
Step S104, eNB use this M-RNTI that the CRC of the DCI format 3/3A that carries MCCH change message is carried out scrambling, and the DCIformat 3/3A after UE sends scrambling.
In the 3GPP LTE system, the DCI of DCI format 3 and 3A is used for eNB and issues the group's signaling that is used for uplink power control.Particularly, DCI format 3 is used to transmit power control TPC (the Transmit Power Control) order of the Physical Uplink Control Channel PUCCH (Physical Uplink Control channel) or the Physical Uplink Shared Channel PUSCH (Physical Uplink Shared channel) of a group, this group's maximum can comprise the TPC order of N UE, the TPC order size of each UE is 2 bits, terminal number N depends on the pay(useful) load size (Payload size) of DCI format 3, this pay(useful) load is the bit number that total bit number that DCI format 3 comprises deducts CRC, the command format of DCI format 3 is equivalent to { TPC_UE1, TPC_UE2, ..., TPC_UEM, CRC}, N equals the pay(useful) load size and removes in the integer part of 2 values, as shown in Figure 2.DCI format 3A also is used to transmit the PUCCH of a group or the TPC of PUSCH orders, this group's maximum can comprise the TPC order of M UE, the TPC order size of each terminal is 1 bit, the terminal number M then depends on the pay(useful) load size of DCI format3A, this pay(useful) load is the bit number that total bit number that DCI format 3A comprises deducts CRC, the command format of DCI format 3A is equivalent to { TPC_UE1, TPC_UE2, ..., TPC_UEN, CRC}, M equal the bit number of pay(useful) load, as shown in Figure 3.
In the present LTE system, the pay(useful) load equal and opposite in direction of DCI format 3 and format 3A, and the pay(useful) load size determines by the pay(useful) load of DCI format 0, the i.e. maximum TPC command number of the carrying of DCIformat 3/3A respectively by
And M=L
Format 0Determine L
Format 0Be the pay(useful) load of DCI format 0 except that CRC.The CRC of each DCI format3/3A carries out scrambling by a TPC-PUSCH-RNTI or TPC-PUCCH-RNTI, eNB is used for receiving required TPC-PUSCH-RNTI or a TPC-PUCCH-RNTI and the one TPC command index (TPC-Index) of TPC order that is carried on DCI format3/3A by high-level signaling notice UE, it is which is individual that this TPC-Index is used to indicate the TPC order of this UE, for DCI format 3, the value of TPC-Index can be N-1, for DCI format 3A, the value of TPC-Index can be M-1.For receiving terminal, UE removes blind check DCI format 3/3A by TPC-PUSCH-RNTI or TPC-PUCCH-RNTI, after detecting, reads the TPC order of oneself by TPC-Index.In addition, DCI format 3/3A is placed in the common search space of LTE protocol definition and sends, and searching position is fixed, and DCI is removed to read in each LTE terminal searching common search space.
Characteristic in view of above-mentioned DCI format 3/3A, eNB in the present embodiment at first will dispose with the M-RNTI that UE makes an appointment to one group of UE, to be eNB support the characteristic of MBMS preferentially to select this M-RNTI to dispose to one group of UE according to the sub-district is used to receive DCIformat 3/3A, eNB uses this M-RNTI that the CRC of the DCI format 3/3A that carries MCCH notification is carried out scrambling then, and sends this DCI format3/3A to UE.Because present embodiment is continued to use original DCI message format 3/3A and is realized the MCCH Notification of Changes, owing to need not to redefine new DCI message in physical layer, also need not to take more common search space in order to send the DCI message of redetermination, so it is less to the change of original system, reduced the complexity of MCCH Notification of Changes, and common search space and utilization rate of channel resources have been improved, so having overcome the MBMS Notification Method in the correlation technique needs again in physical layer definition DCI message, bigger to the original process change of system, and complexity is higher; The DCI message of redetermination exists the back to incompatible shortcoming; Can cause inadequate resource for the DCI message that sends redetermination in limited common search space, influence the problem of original DCI message that on the common search space, sends.
Preferably, in above-mentioned Notification Method, step S102 specifically comprises: eNB and UE fixedly install a RNTI value and are M-RNTI, and this M-RNTI is shared by the TPC-RNTI of DCI format3/3A simultaneously, and TPC-RNTI comprises TPC-PUCCH-RNTI and TPC-PUSCH-RNTI.
Present embodiment is provided with eNB and terminal in the RNTI of system list of values all to give tacit consent to the value of a RNTI who knows be M-RNTI, the value of this RNTI is that the TPC-RNTI of DCI format3/3A shares simultaneously, and promptly this value eNB can be configured to TPC-PUCCH-RNTI or TPC-PUSCH-RNTI.This M-RNTI can be the default value that eNB and UE make an appointment, and again this M-RNTI is notified to UE after also can being provided with by eNB, makes UE know M-RNTI and implication thereof, and then obtains DCI according to this M-RNTI search.
Preferably, in above-mentioned Notification Method, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFFDh, and promptly 16 systems are counted FFFD.In the RNTI of system list of values, FFFDh is reservation bit originally, present embodiment has then been given special implication to it, be that FFFDh shares for the TPC-RNTI of DCI format 3/3A and M-RNTI simultaneously, eNB can be configured as TPC-PUCCH-RNTI or TPC-PUSCH-RNTI, and is as shown in table 1.
Table 1 is according to the RNTI list of values of second embodiment of the invention
Preferably, in above-mentioned Notification Method, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFF3h, and promptly 16 systems are counted FFF3.In the RNTI of system list of values, FFF3h just has the implication of TPC-PUCCH-RNTI and TPC-PUSCH-RNTI originally, present embodiment has been given the new implication of M-RNTI with it, and FFF3h is that the TPC-RNTI of DCI format 3/3A shares simultaneously, eNB can be configured as TPC-PUCCH-RNTI or TPC-PUSCH-RNTI, and is as shown in table 2.
Table 2 is according to the RNTI list of values of third embodiment of the invention
Preferably, in above-mentioned Notification Method, P bit among the DCI format 3/3A is used to carry MCCH notification.
In the present embodiment when eNB need send MCCH notification, eNB utilizes P bit among the DCI format 3/3A to send MCCH notification to UE, and the bit position of this P bit in the DCI of M-RNTI correspondence format3/3A is known to the UE, and what the UE that promptly needs to receive MCCH notification message knew which bit carrying among the DCI format 3/3A is the TPC order of any UE of MCCH notification rather than carrying.Do like this, make the UE that receives DCI be easy to therefrom read MCCHnotification.
Preferably, in above-mentioned Notification Method, if form is DCI format 3, then TPC-Index be 1～
TPC order be used to send MCCH notification, wherein
Expression rounds up to P/2.
Present embodiment sends the situation of MCCH notification for adopting DCI format 3 because the TPC of each UE order size is 2 bits among the DCI format 3, so preceding P the bit that is taken by MCCHnotification corresponding to
Individual TPC order, (TPC order #1～TPC orders # to remove the TPC order that is taken by P bit MCCH notification message among the DCI format3
) can not be used to send outside the TPC order of any UE by eNB, (TPC orders # in other TPC order
～TPC orders #N) eNB person's value of can be used for carrying TPC-PUCCH-RNTI or TPC-PUSCH-RNTI is configured to the TPC order of those UE of M-RNTI.
Preferably, in above-mentioned Notification Method, if form is DCI format 3A, then TPC-Index is that the TPC order of 1～P is used to send MCCH notification.
Present embodiment sends the situation of MCCH notification for adopting DCI format 3A, because the TPC of each UE order size is 1 bit among the DCI format 3A, so ordered corresponding to P TPC by preceding P the bit that MCCH notification takies, can not be used to send the TPC order of any UE by eNB except that the TPC that taken by P bit MCCH notification message order (TPC order #1～TPC order #P) among the DCIformat 3A, the TPC that the value that other TPC order (TPC order # (P+1)～TPC orders #M) eNB can be used for carrying TPC-PUCCH-RNTI or TPC-PUSCH-RNTI is configured to those UE of M-RNTI orders.
Preferably, in above-mentioned Notification Method, comprise after step S104: UE obtains DCI format 3/3A according to above-mentioned M-RNTI, and reads P bit among the DCI format 3/3A, obtains MCCH notification.Because eNB is provided with P bit among the DCI format 3/3A and is specifically designed to and carries MCCH notification, thus UE after searching DCIformat 3/3A, promptly directly DCI is read according to this agreement, thereby obtain MCCH notification.
Preferably, in above-mentioned Notification Method, also comprised before step S102: the bit parameter that eNB is provided with MCCH notification is P, and the P value is informed UE.
What the P value can be by the eNB flexible configuration in the present embodiment, before eNB was provided with M-RNTI, to UE configuration P value, the possible value of P had 1,2,3 to eNB by high-level signaling, etc.; If eNB does not carry out particular arrangement to the P value, promptly UE does not receive the high-level signaling that is used to dispose the P value, thinks that then P is default value 2, i.e. P=2.Present embodiment support the P value is carried out flexible configuration, thereby improved the flexibility and the autgmentability of MCCH notification informing mechanism.
Second embodiment
ENB does not carry out particular arrangement to the P value in the present embodiment, and promptly UE does not receive the high-level signaling that is used to dispose the P value, and think that P is default value, i.e. P=2 this moment; In addition, present embodiment adopts RNTI list of values as shown in table 1 that M-RNTI is configured, i.e. M-RNTI=FFFDh.
When change took place MCCH, the MCCH notification message of P bit of transmission need be fixed to UE by system, and each MCCH notification is 1 bit, and then the Notification Method of present embodiment may further comprise the steps:
Step 1, eNB utilizes preceding 2 bits carrying MCCH notification message fixing among DCI format 3 or the 3A, and use M-RNTI=FFFDh, referring to table 1, this CRC that carries the DCI format 3/3A of MCCH notification is carried out scrambling, and then UE knows that in advance preceding 2 bits on the DCI format 3/3A of this M-RNTI correspondence are the MCCH notification message of carrying rather than the TPC order of any UE; ENB is for having distributed TPC-PUSCH-RNTI or TPC-PUCCH-RNTI (being referred to as TPC-RNTI) to be one group of UE with M-RNTI one sample value (FFFDh):
If eNB disposes that this organizes that all UE adopt is that the TPC that DCI format 3 is used to transmit this group UE orders, can not distribute the TPC-Index of any one UE among this group UE be 1 to eNB so, as shown in Figure 4, the 2 shared bits of first TPC order of the DCI format 3 of M-RNTI scrambling are used to transmit MCCH notification and can not order as the TPC of any UE, and TPC-Index is that the TPC of those TPC order of 2～N UE that can to carry N-1 TPC-RNTI be FFFDh orders among this DCI format 3, so it is FFFDh (just equating with M-RNTI) that eNB can distribute the TPC-RNTI of a maximum N-1 UE, be that 2～N indicates these UE TPC order separately by configuration UE TPC-Index then;
If eNB disposes that this organizes that all UE adopt is that the TPC that DCI format 3A is used to transmit this group UE orders, can not distribute the TPC-Index of any one UE among this group UE be 1 and 2 to eNB so, as shown in Figure 5, first of the DCI format 3 of M-RNTI scrambling is used to transmit MCCH notification with second 2 shared bit of TPC order and can not be as the TPC order of any UE, and TPC-Index is that the TPC of those TPC order of 3 to M UE that can to carry M-2 TPC-RNTI be FFFDh orders among this DCI format 3A, so it is FFFDh (just equating with M-RNTI) that eNB can distribute the TPC-RNTI of a maximum M-2 UE, be that 3～M indicates these UE TPC order separately by configuration UE TPC-Index then;
Step 2, need the UE that monitors MCCH change message to search for the DCI format 3/3A that carries MCCH notification by M-RNTI, the MCCH change takes place eNB and the DCI format 3/3A by the M-RNTI scrambling has sent MCCH notification message, described terminal detects by M-RNTI and reads above-mentioned preceding 2 bits behind this DCI format 3/3A and obtain corresponding MCCH change message, and those have disposed TPC-RNTI is that the TPC-Index of UE by configuration of M-RNTI reads TPC order separately.
By present embodiment as can be known, the MCCHnotification message that MBMS business demand terminal arranged can place a DCI format 3/3A to send with the TPC order of other terminal, avoided sending a new DCI for MCCH notification specially, thereby reduced increase blind check number of times, alleviate the load of PDCCH common search space and channel resource, thereby improved resource utilization.
The 3rd embodiment
ENB carries out particular arrangement to the P value in the present embodiment, and promptly UE receives the high-level signaling that is used to dispose the P value, and think that P is the value that eNB disposes this moment in high-level signaling, be 1,2,3 such as P; In addition, present embodiment adopts RNTI list of values as shown in table 2 that M-RNTI is configured, i.e. M-RNTI=FFF3h.
When change took place MCCH, system need send the MCCH notification message of P bit to UE, and each MCCH notification is 1 bit, and then the Notification Method of present embodiment may further comprise the steps:
Step 1, eNB passes through the P value of broadcast broadcast configuration, P=1,2,3, then all MBMS terminals all have a plurality of MCCH notification message as can be known;
Step 2, eNB utilizes preceding P fixing among DCI format 3 or 3A bit carrying MCCH notification message and uses M-RNTI=FFF3h, referring to table 2, this CRC that carries the DCI format 3/3A of MCCH notification is carried out scrambling, and then MBMS UE knows that in advance preceding P bit on the DCI format 3/3A of this M-RNTI correspondence is the MCCH notification message of carrying rather than the TPC order of any UE; ENB is for having distributed TPC-PUSCH-RNTI or TPC-PUCCH-RNTI (being referred to as TPC-RNTI) to be one group of UE with M-RNTI one sample value (FFF3h):
If eNB disposes that this organizes that all UE adopt is that the TPC that DCI format 3 is used to transmit this group UE orders, and eNB can not distribute the TPC-Index of any one UE among this group UE 1 to arrive so
Before this
Individual bit all take for MCCH notification even empty can not be as the TPC of any UE order, and TPC-Index is among this DCI format 3
TPC to those TPC order of N UE that can to carry c TPC-RNTI be FFF3h orders, so eNB can distribute maximum
The TPC-RNTI of individual UE is FFF3h (just equating with M-RNTI), by configuration UE TPC-Index is then
Indicate these UE TPC order separately to N;
If eNB disposes that this organizes that all UE adopt is that the TPC that DCI format 3A is used to transmit this group UE orders, can not distribute the TPC-Index of any one UE among this group UE be 1 to P to eNB so, the shared P bit of preceding P TPC order is used to transmit MCCH notification and can not be as the TPC order of any UE, and among this DCIformat 3A TPC-Index to be P+1 order to the TPC of those TPC orders of M UE that can to carry M-P TPC-RNTI be FFF3h, so it is FFF3h (just equating with M-RNTI) that eNB can distribute the TPC-RNTI of a maximum M-P UE, be that P+1 indicates these UE TPC order separately to M by configuration UE TPC-Index then;
Step 3, need the UE that monitors MCCH change message to search for the DCI format 3/3A that carries MCCH notification by M-RNTI, the MCCH change takes place eNB and the DCI format 3/3A by the M-RNTI scrambling has sent MCCH notification message, described terminal detects by M-RNTI and reads preceding P above-mentioned bit behind this DCI format 3/3A and obtain corresponding MCCH change message, and those have disposed TPC-RNTI is that the TPC-Index of UE by configuration of M-RNTI reads TPC order separately.
Present embodiment supports that eNB adjusts the P value according to actual conditions owing to adopted eNB that the P value is configured, thereby has improved the autgmentability of MCCH Notification of Changes.
The 4th embodiment
Fig. 6 shows the structure chart according to the notifying device of fourth embodiment of the invention, and this device comprises:
Sending module 604 is used for eNB and uses above-mentioned M-RNTI that the CRC of the DCI format 3/3A that carries MCCH notification is carried out scrambling, and the DCI format 3/3A after UE sends scrambling.
It is one group of M-RNTI that the UE configuration is made an appointment that present embodiment at first adopts configuration module 602 to be used for eNB, to be eNB support the characteristic of MBMS preferentially to select this M-RNTI to dispose to one group of UE according to the sub-district is used to receive DCI format 3/3A, the M-RNTI that adopts sending module 604 to use then to appoint with above-mentioned UE carries out scrambling to the CRC of the DCI format 3/3A that carries MCCH notification, and sends this DCI format 3/3A to UE.Because present embodiment is continued to use original DCI message format 3/3A and is realized the MCCH Notification of Changes, owing to need not to redefine new DCI message in physical layer, also need not to take more common search space in order to send the DCI message of redetermination, so it is less to the change of original system, reduced the complexity of MCCH Notification of Changes, and common search space and utilization rate of channel resources have been improved, so having overcome the MBMS Notification Method in the correlation technique needs again in physical layer definition DCI message, bigger to the original process change of system, and complexity is higher; The DCI message of redetermination exists the back to incompatible shortcoming; Can cause inadequate resource for the DCI message that sends redetermination in limited common search space, influence the problem of original DCI message that on the common search space, sends.
Preferably, in above-mentioned notifying device, configuration module specifically comprises: the M-RNTI configuration module, be used for eNB and UE and fixedly install a RNTI value for M-RNTI, this M-RNTI is shared by the TPC-RNTI of DCI format 3/3A simultaneously, and TPC-RNTI comprises TPC-PUCCH-RNTI and TPC-PUSCH-RNTI.
Present embodiment adopts the M-RNTI configuration module to be provided with eNB and terminal in the RNTI of system list of values, and all to give tacit consent to the value of a RNTI who knows be M-RNTI, the value of this RNTI is that the TPC-RNTI of DCI format 3/3A shares simultaneously, and promptly adopting the TPC-RNTI configuration module to dispose this M-RNTI is TPC-PUCCH-RNTI or TPC-PUSCH-RNTI.This M-RNTI can be the default value that eNB and UE make an appointment, and again this M-RNTI is notified to UE after also can being provided with by eNB, makes UE know M-RNTI and implication thereof, and then obtains DCI according to this M-RNTI search.
Preferably, in above-mentioned notifying device, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFFDh, and promptly 16 systems are counted FFFDh.In the RNTI of system list of values, FFFDh is reservation bit originally, and present embodiment has then been given special implication to it, and promptly FFFDh is that the TPC-RNTI of DCI format 3/3A shares simultaneously, eNB can be configured as TPC-PUCCH-RNTI or TPC-PUSCH-RNTI, and is as shown in table 1.
Preferably, in above-mentioned notifying device, the TPC-RNTI of M-RNTI and DCI format 3/3A is shared as FFF3h, and promptly 16 systems are counted FFF3h.In the RNTI of system list of values, FFF3h just has the implication of TPC-PUCCH-RNTI and TPC-PUSCH-RNTI originally, present embodiment has been given the new implication of M-RNTI with it, be that FFF3h shares for the TPC-RNTI of DCI format 3/3A simultaneously, eNB can be configured as TPC-PUCCH-RNTI or TPC-PUSCH-RNTI, and is as shown in table 2.
Preferably, in above-mentioned notifying device, P the bit of DCI format 3/3A is used to carry MCCH notification.
In the present embodiment when eNB need send MCCH notification, eNB utilizes preceding P the bit of DCI format 3/3A to send MCCH notification to UE, and the bit position of this P bit in the DCI of M-RNTI correspondence format3/3A is known to the UE, and what the UE that promptly needs to receive MCCH notification message knew which bit carrying among the DCI format 3/3A is the TPC order of any UE of MCCH notification rather than carrying.Do like this, make the UE that receives DCI be easy to therefrom read MCCHnotification.
Preferably, above-mentioned notifying device also comprises: read module, and be used for UE and obtain DCI format 3/3A, and read P bit among the DCI format 3/3A according to above-mentioned M-RNTI, obtain MCCH change message.Because eNB is provided with P bit among the DCI format 3/3A and is specifically designed to and carries MCCH notification, thus UE after searching DCI format 3/3A, promptly directly DCI is read according to this agreement, thereby obtain MCCH notification.
Preferably, above-mentioned notifying device also comprises: the P value is provided with module, and being used for the bit parameter that eNB is provided with MCCH notification is P, and the P value is informed UE.
Present embodiment adopts the P value that module is set, so support that eNB carries out flexible configuration to the P value, before eNB was provided with M-RNTI, eNB was by disposing the P value to UE broadcasting high-level signaling, and the possible value of P has 1,2,3; If eNB does not carry out particular arrangement to the P value, promptly UE does not receive the high-level signaling that is used to dispose the P value, thinks that then P is default value, i.e. P=2.Present embodiment support the P value is carried out flexible configuration, thereby improved the flexibility and the autgmentability of MCCH notification informing mechanism.
As can be seen from the above description, the above embodiments of the present invention are less to the change of original system, reduced the complexity of MCCH Notification of Changes, and improved common search space and utilization rate of channel resources.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a multimedia broadcast multi-broadcasting business Notification Method is characterized in that, may further comprise the steps:
The Node B eNB of evolution is the multimedia broadcast multi-broadcasting business control channel change message Radio Network Temporary Identifier M-RNTI that one group of terminal configuration is made an appointment;
Described eNB uses described M-RNTI that the cyclic redundancy check of the Downlink Control Information DCI format 3/3A that carries multimedia broadcast multi-broadcasting business control channel MCCH change message is carried out scrambling, and the DCI format 3/3A after described terminal sends scrambling.
2. Notification Method according to claim 1 is characterized in that, eNB is that the M-RNTI that one group of terminal configuration is made an appointment specifically comprises:
Described eNB and described terminal fixedly install a RNTI value and are described M-RNTI, described M-RNTI is shared by the power control Radio Network Temporary Identifier TPC-RNTI of DCI format 3/3A simultaneously, and described TPC-RNTI comprises Physical Uplink Control Channel power control Radio Network Temporary Identifier TPC-PUCCH-RNTI and Physical Uplink Shared Channel power control Radio Network Temporary Identifier TPC-PUSCH-RNTI.
3. Notification Method according to claim 1 is characterized in that, the TPC-RNTI of described M-RNTI and described DCI format 3/3A is shared as FFFDh.
4. Notification Method according to claim 1 is characterized in that, the TPC-RNTI of described M-RNTI and described DCI format 3/3A is shared as FFF3h.
5. Notification Method according to claim 1 is characterized in that, P bit among the described DCI format3/3A is used to carry described MCCH change message.
6. Notification Method according to claim 1, it is characterized in that, use described M-RNTI that the cyclic redundancy check of the DCI format3/3A that carries MCCH change message is carried out scrambling at described eNB, and after the DCI format 3/3A after described terminal sends scrambling, also comprise:
Described terminal obtains described DCI format 3/3A according to described M-RNTI, and reads P bit among the described DCI format 3/3A, obtains described MCCH change message.
7. Notification Method according to claim 1 is characterized in that, also comprises before the DCI format 3/3A after sending scrambling to described terminal:
The bit parameter that described eNB is provided with described MCCH change message is P, and the P value is informed terminal.
8. a multimedia broadcast multi-broadcasting business notifying device is characterized in that, comprising:
Configuration module, the Node B eNB that is used for evolution are that the multimedia broadcast multi-broadcasting business control channel change message wireless network that one group of terminal configuration is made an appointment is marked M-RNTI temporarily;
Sending module, be used for described eNB and use described M-RNTI that the cyclic redundancy check of the Downlink Control Information DCI format 3/3A that carries described multimedia broadcast multi-broadcasting business control channel MCCH change message is carried out scrambling, and the DCI format 3/3A after described terminal sends scrambling.
9. notifying device according to claim 8 is characterized in that, described configuration module specifically comprises:
The M-RNTI configuration module, be used for described eNB and described terminal and fixedly install a RNTI value for described M-RNTI, described M-RNTI is shared by the power control Radio Network Temporary Identifier TPC-RNTI of DCI format3/3A simultaneously, and described TPC-RNTI comprises Physical Uplink Control Channel power control Radio Network Temporary Identifier TPC-PUCCH-RNTI and Physical Uplink Shared Channel power control Radio Network Temporary Identifier TPC-PUSCH-RNTI.
10. notifying device according to claim 8 is characterized in that, the TPC-RNTI of described M-RNTI and described DCI format 3/3A is shared as FFFDh.
11. notifying device according to claim 8 is characterized in that, the TPC-RNTI of described M-RNTI and described DCI format 3/3A is shared as FFF3h.
12. notifying device according to claim 8 is characterized in that, P bit among the described DCI format3/3A is used to carry described MCCH change message.
13. notifying device according to claim 8 is characterized in that, also comprises:
Read module is used for described terminal and obtains described DCIformat 3/3A according to described RNTI, and reads described P bit among the described DCI format 3/3A, obtains described MCCH change message.
14. notifying device according to claim 8 is characterized in that, also comprises:
The P value is provided with module, and being used for the bit parameter that described eNB is provided with described MCCH change message is P, and the P value is informed terminal.
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