CN102100104B - Method for indicating switching of service cells, method and apparatus for switching service cells - Google Patents
Method for indicating switching of service cells, method and apparatus for switching service cells Download PDFInfo
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- CN102100104B CN102100104B CN200980125177.1A CN200980125177A CN102100104B CN 102100104 B CN102100104 B CN 102100104B CN 200980125177 A CN200980125177 A CN 200980125177A CN 102100104 B CN102100104 B CN 102100104B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
Abstract
A method for indicating switching of service cells, method and apparatus for switching service cells are provided in the embodiments of the present invention. The method for indicating switching of service cells includes the steps of: determining a target service cell for sending control information for a User Equipment (UE); generating Medium Access Control sub-layer control Packet Data Unit information for indicating the User Equipment (UE) to switch to the target service cell from source service cell, wherein the Medium Access Control sub-layer control Packet Data Unit information includes the index or cell identifier of the target service cell; sending the Medium Access Control sub-layer control Packet Data Unit information to the User Equipment (UE). According to the embodiments of the present invention, it is possible to inform a UE quickly of the switching of the target service cell, and to shorten the switching time of service cells, so that the dynamic switching of service cells is ensured.
Description
Technical field
The embodiment of the invention relates to communication technical field, relates in particular to a kind of Serving cell switching instruction method, Serving cell switching method and apparatus.
Background technology
In wireless communication system, multipoint cooperative transmitting/receiving (Coordinated Multi-Point; Hereinafter to be referred as: CoMP) technology is to improve an important means of residential quarter overall performance and community marginal user performance.The emission of descending multipoint cooperative refers to that launch point that a plurality of geographical position disperse is united and is subscriber equipment (User Equipment; Hereinafter to be referred as: UE) send data, ascending multi-point collaboration receives and refers to that the acceptance point that a plurality of geographical position disperse jointly receives the data of UE and carries out Combined Treatment.
In the CoMP system, network node comprises base station (eNodeB) and some access points for example residential quarter (cell), transmission receiving node (transmission and reception point), radio frequency units (RRU) and access node (Access Point; Hereinafter to be referred as: AP) etc., wherein " AP " is a node that comprises at least radio-frequency (RF) transceiver, and AP is upper can to configure individual antenna unit or a plurality of antenna elements.A plurality of AP disperse in the geographical position to distribute and be connected to the base station.In CoMP, a plurality of AP can cooperate and transmit and receive the UE data, and the AP of these cooperations can be from same base station, also can be from different base stations.The relation of AP and traditional residential quarter (cell) can be that a residential quarter comprises an AP, or a residential quarter comprises a plurality of AP; Followingly for convenience of description comprise an AP take a cell and illustrate as example.Usually, when a plurality of AP are the UE service, UE can select an AP to transmit some control informations as Serving cell (anchor cell, PDCCH cell), for example can be by Physical Downlink Control Channel (the Physical Downlink Control Channel of this AP; Hereinafter to be referred as: PDCCH) transmit these control informations, other AP only provides business information, for example can only pass through Physical Downlink Shared Channel (Physical Downlink Shared Channel; Hereinafter to be referred as: PDSCH) transport service information does not send control information.
In realizing process of the present invention, the inventor finds: existing residential quarter switching flow all is Radio Resource control (Radio Resource Control; Hereinafter to be referred as: RRC) signalling interactive process, relate to eat dishes without rice or wine, handshake procedure repeatedly on X2 (interface between the base station), S1 (interface between base station and the core net (the MME)) interface, cause the time delay of high-level signaling handshake procedure longer, can't notify fast the UE Serving cell to switch.
Summary of the invention
The embodiment of the invention provides a kind of Serving cell switching instruction method, Serving cell switching method and apparatus, in order to solve in the prior art defective of can't fast notification UE Serving cell switching, so that the result that Serving cell is selected can notify UE rapidly and accurately, realize the switching of quick service residential quarter.
The embodiment of the invention provides a kind of Serving cell switching instruction method, comprising:
Be identified for the target serving district that sends control information for subscriber equipment;
Generation is used to indicate described subscriber equipment switches to described target serving district from the source Serving cell MAC sublayer control packet data unit information, and described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
Send described MAC sublayer control packet data unit information to described subscriber equipment.
The embodiment of the invention provides a kind of Serving cell switching instruction method, comprising:
Be identified for the target serving district that sends control information for subscriber equipment;
Generation is used to indicate described subscriber equipment switches to described target serving district from the source Serving cell switch indicating information, and described switch indicating information comprises index or the cell ID of described target serving district;
Send described switch indicating information by physical layer control channel to described subscriber equipment.
The embodiment of the invention provides a kind of Serving cell changing method, comprising:
Obtain subscriber equipment switches to target serving district from the source Serving cell the MAC sublayer control packet data unit information that is used to indicate of network side transmission, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
By the target serving district receiving control information corresponding with described index or cell ID.
The embodiment of the invention provides a kind of Serving cell changing method, comprising:
Receive network side by described subscriber equipment switches to described target serving district from the source Serving cell the switch indicating information that is used to indicate of physical layer control channel transmission, described switch indicating information comprises index or the cell ID of described target serving district;
By the target serving district receiving control information corresponding with described index or cell ID.
The embodiment of the invention provides a kind of base station, comprising:
The first determination module is for the target serving district that is identified for sending control information for subscriber equipment;
The first generation module, be used for generation and be used to indicate described subscriber equipment switches to described target serving district from the source Serving cell MAC sublayer control packet data unit information, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
The first sending module is used for sending described MAC sublayer control packet data unit information to described subscriber equipment.
The embodiment of the invention provides a kind of base station, comprising:
The second determination module is for the target serving district that is identified for sending control information for subscriber equipment;
The second generation module is used for generation and is used to indicate described subscriber equipment switches to described target serving district from the source Serving cell switch indicating information, and described switch indicating information comprises index or the cell ID of described target serving district;
The second sending module is used for sending described switch indicating information by physical layer control channel to described subscriber equipment.
The embodiment of the invention provides a kind of subscriber equipment, comprising:
The first acquisition module, be used for obtaining subscriber equipment switches to target serving district from the source Serving cell the MAC sublayer control packet data unit information that is used to indicate of network side transmission, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
The first receiver module is used for by the target serving district receiving control information corresponding with described index or cell ID.
The embodiment of the invention provides a kind of subscriber equipment, comprising:
The second acquisition module, be used for obtaining network side by described subscriber equipment switches to described target serving district from the source Serving cell the switch indicating information that is used to indicate of physical layer control channel transmission, described switch indicating information comprises index or the cell ID of described target serving district;
The second receiver module is used for by the target serving district receiving control information corresponding with described index or cell ID.
The embodiment of the invention provides a kind of network system, comprising:
The base station, for the target serving district that is identified for sending control information for described subscriber equipment, send described subscriber equipment switches to described target serving district from the source Serving cell the MAC sublayer control packet data unit information that is used to indicate that generates to described subscriber equipment, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
Subscriber equipment is used for obtaining the described MAC sublayer control packet data unit information that is used for of described base station transmission, and by the target serving district receiving control information corresponding with described index or cell ID.
The embodiment of the invention provides a kind of network system, comprising:
The base station, for the target serving district that is identified for sending control information for described subscriber equipment, and send to described subscriber equipment by physical layer control channel and to be used to indicate described subscriber equipment switches to described target serving district from the source Serving cell switch indicating information, described switch indicating information comprises index or the cell ID of described target serving district;
Subscriber equipment is used for obtaining the described switch indicating information that described base station sends, and by the target serving district receiving control information corresponding with described index or cell ID.
The Serving cell switching instruction method that the embodiment of the invention provides, Serving cell switching method and apparatus can be notified the switching of UE target serving district rapidly, can shorten Serving cell switching time, have guaranteed the dynamic switching of Serving cell.
Description of drawings
Fig. 1 is Serving cell switching instruction method embodiment one flow chart of the present invention;
Fig. 2 is Serving cell changing method embodiment one flow chart of the present invention;
Fig. 3 is Serving cell switching instruction method embodiment two flow charts of the present invention;
Fig. 4 is Serving cell changing method embodiment two flow charts of the present invention;
Fig. 5 is embodiment one structural representation in base station of the present invention;
Fig. 6 is subscriber equipment embodiment one structural representation of the present invention;
Fig. 7 is that network system embodiment one of the present invention forms schematic diagram;
Fig. 8 is embodiment two structural representations in base station of the present invention;
Fig. 9 is subscriber equipment embodiment two structural representations of the present invention;
Figure 10 is that network system embodiment two of the present invention forms schematic diagram.
Embodiment
Further specify the technical scheme of the embodiment of the invention below in conjunction with the drawings and specific embodiments.
Defined the current candidate set (reporting set, candidate CoMP set, CoMP reporting set) that service can be provided for UE in CoMP, UE will report the relevant informations such as channel quality of this set small area.According to this information, scheduler is that the suitable residential quarter of the dynamic selection of UE sends control information and business information.For each CoMP UE, the selection of Serving cell can be dynamic.Network side selects the best residential quarter of signal quality to send control information according to the channel quality that reports, and guarantees that control information correctly receives.In order to cooperate dynamic Serving cell to select, target serving district needs to notify fast and accurately UE, can obtain better control information service.The selection of Serving cell can be semi-static.The control information signal quality variation of source Serving cell will be very fast this moment, and network side also needs to notify fast and accurately UE with target serving district, can obtain better control information service.
In wireless communication system, development along with multipoint cooperative transmitting/receiving technology, the Serving cell of the base station control information that Dynamic Selection provides for UE in the residing a plurality of cell range of UE has become the important topic of improving service quality, yet the flow process that notice UE Serving cell switches in the prior art generally is based on the RRC signaling and finishes, because RRC signalling interactive process time delay is longer, cause the defective that to notify rapidly the UE Serving cell to switch.The embodiment of the invention provides a solution namely by MAC sublayer (Medium Access Control for the defective of prior art; Hereinafter to be referred as: MAC) the control packet data unit information is that " MAC control PDU " notice UE Serving cell switches or switches by physical control channel notice UE Serving cell, two schemes all can shorten Serving cell switching time, guarantee that UE switches to target serving district fast, use embodiment of the invention advantage and be: the dynamic switching of Serving cell; Serving cell is semi-static when switching can fast notification UE Serving cell switching, be mainly used in Cell Edge User control channel mass change and descend very fast (for example UE high-speed motion), can switch timely UE, prevent handoff failure.Below describe in detail respectively.
Fig. 1 is Serving cell switching instruction method embodiment one flow chart of the present invention, and as shown in Figure 1, the method comprises:
UE is in the cordless communication network, and a plurality of residential quarters under the base station all can provide control information for this UE based on the CoMP technology, and certainly in order to guarantee the transmission success rate of control information, the base station can send to UE by the best residential quarter of channel quality with control information.Therefore UE can measure the channel quality of each residential quarter, and reports the base station, behind the channel quality information of each residential quarter that base station reception UE sends, and can be dynamically at channel quality indication (Channel Quality Indicator; Hereinafter to be referred as: CQI) report selection Serving cell in the set (also being the candidate collection of scheduling).Particularly, the channel quality information that the scheduler of inside of base station or RRC or MAC or higher layer entities report according to UE is defined as the target serving district that UE provides control information, selects namely that the best residential quarter of channel quality provides control information as new Serving cell for UE in each residential quarter.Wherein said channel quality information comprises the measured value of fast channel variation of channel and/or the measured value of low channel variation alternatively, and wherein the measured value of fast channel variation comprises CQI and/or pre-coding matrix indication (Precoding Matrix Indication; Hereinafter to be referred as: PMI) with channel status indication (Channel state information; Hereinafter to be referred as: CSI) and/or the measured value of low channel variation comprise Reference Signal Received Power (Reference Signal Received Power; Hereinafter to be referred as: RSRP) and/or reference signal receiving intensity (Reference Signal Received Quality; Hereinafter to be referred as: RSRQ) and/or path loss (PathLoss; Hereinafter to be referred as: PL).Described measured value both can comprise that the out-hole run result also can comprise for example uplink reference symbol (Sounding Reference Signal of down-run survey result; Hereinafter to be referred as: SRS) and/or Physical Uplink Shared Channel (Physical Uplink Share Channel hereinafter to be referred as: PUSCH) and/or Physical Uplink Control Channel (Physical Uplink Control Channel; Hereinafter to be referred as: measurement result PUCCH) etc.
Except according to the channel quality, it is also conceivable that other factors when determining target serving district in the present embodiment, such as cell load and UE speed conditions etc. if source Serving cell load is heavier, can switch to this UE other residential quarters to alleviate load; If the UE excessive velocities can switch to neighbor cell etc. as early as possible with it.
The base station is after having chosen target serving district, and in time notice is to UE with selected target serving district, and UE is notified by the mode of " MAC control PDU " in the base station in the present embodiment.Be specially, the base station is according to index or the cell ID of target serving district, generate MAC control packet data unit information i.e. " MAC control PDU ", that is to say that the base station sends among " the MAC control PDU " of UE to carry the index of target serving district or the cell ID of target serving district (Cell ID).The index of wherein said target serving district can in advance by the index value of the semi-static notice UE candidate cell of high-level signaling, can be notified this target serving district of UE with the index of target serving district in " MAC control PDU ".
Step 102 sends described MAC control packet data unit information to described subscriber equipment.
Behind generated " the MAC control PDU " for notice UE target serving district in base station, by mixed automatic retransfer request (Hybr id-Automatic Repeat Request; Hereinafter to be referred as: HARQ) process sends to UE with " MAC control PDU ", and indication UE switches to the target serving district receiving control information corresponding with " MAC control PDU " entrained index or cell ID.
Certainly in the present embodiment, the base station can also be with should " MAC control PDU " generating MAC Packet Data Unit information i.e. " MAC PDU " with other data or controll block information, then with this MAC PDU " send to UE.
After the notice UE target serving district of base station, after if UE successfully obtains the index or cell ID of described target serving district, concrete, be that UE successfully gets access to " MAC control PDU ", and after successfully decode " MAC control PDU ", return the affirmation response message, i.e. " ACK " message, if UE does not successfully obtain index or the cell ID of described target serving district, namely successfully do not get access to " MAC control PDU ", although perhaps get access to " MAC control PDU " but can not be correctly decoded, then will return i.e. " NACK " message of failure response information.If the HARQ progress feedback that optional base station receives is " ACK " message, then the base station only sends control information by target serving district.At this moment, the source Serving cell is by X2 interface indicating target Serving cell handover success, the notification target Serving cell starts the transmission for the UE control information, for example, send signaling and carry start-up time, the notification target Serving cell starts or immediately at System Frame Number (the System Frame Number of appointment; Hereinafter to be referred as: SFN) start.Target serving district namely begins to send control information by PDCCH after receiving indication, and to source Serving cell feeding back confirmation message.The source Serving cell stops to send control information to this UE after receiving the affirmation message of target serving district.Target serving district can not fed back to the source Serving cell yet, automatically stops to send control information by PDCCH after a period of time after the source Serving cell transmission handover success message; If it is " NACK " message that the base station receives the HARQ progress feedback, then the base station sends " MAC control PDU " to UE again.
In the Serving cell switching instruction method that provides in above-described embodiment, all be only to have a residential quarter to send control information at any time.
In order to provide control information for UE better, the base station can be within the time of waiting for the UE feedback, send control information to UE simultaneously by source Serving cell and target serving district, be in particular, the base station sends to UE and comprises the index of target serving district or " the MAC control PDU " of cell ID afterwards, waited for for second scheduled time; Then send control information simultaneously by source Serving cell and target serving district, the source Serving cell is by the transmission of inter-base station interface X2 notification target Serving cell startup for the UE control information, for example, send signaling and carry start-up time, the notification target Serving cell starts immediately or starts at the SFN of appointment, perhaps.Certainly, second scheduled time can not waited for in the base station, started immediately source Serving cell and target serving district and sent control information simultaneously.Then UE can stop the detection resources Serving cell immediately after being correctly decoded " MAC control PDU ", and directly starts the control information reception of target serving district.Described second scheduled time and UE decoding " the MAC control PDU " time, " MAC control PDU " eat dishes without rice or wine the transmission time (propagation roundtrip time) relevant, for example can be set as 4ms.After the notice UE target serving district of base station, if UE successfully decodes after " MAC control PDU ", will return to the base station " ACK " message, if UE does not successfully get access to " MAC control PDU ", although perhaps get access to " MAC control PDU " but can not be correctly decoded, then will return " NACK " message.If the HARQ progress feedback that the base station receives is " ACK " message, then the base station stops to send described control information by the source Serving cell, only sends control information by target serving district.If the HARQ progress feedback that the base station receives is " NACK " message, then the base station sends " MAC control PDU " to UE again.
If UE feeds back to target serving district with ACK, at this moment, target serving district can stop by interface X2 indication source Serving cell between the base station transmission of control information.
In the Serving cell switching instruction method that above embodiment provides, new " the MAC control PDU " that Serving cell switches carried out by increasing a kind of UE of being used to indicate in the base station, the switching of fast notification UE target serving district, can shorten Serving cell switching time, guarantee the quick switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Fig. 2 is Serving cell changing method embodiment one flow chart of the present invention, and as described in Figure 2, the method comprises:
Step 200, obtain subscriber equipment switches to target serving district from the source Serving cell the MAC control packet data unit information that is used to indicate of network side transmission, described MAC control packet data unit information comprises index or the cell ID of described target serving district;
UE can measure the channel quality information of each residential quarter, and reports the base station, behind the channel quality information of each residential quarter that base station reception UE sends, selects Serving cell according to this channel quality information; And generate and to be used to indicate UE switches to target serving district from the source Serving cell " MAC control PDU ", wherein carry index or the cell ID of target serving district.
Step 201 is by the target serving district receiving control information corresponding with described index or cell ID.
After if UE successfully obtains the index or cell ID of described target serving district, concrete, be that UE successfully gets access to " MAC control PDU ", and after successfully decode " MAC control PDU ", return the affirmation response message, i.e. " ACK " message, and waiting for for the 3rd scheduled time for example after N subframe, namely be enabled in by the target serving district receiving control information corresponding with index or cell ID and pass through the PDCCH receiving control information on the target serving district.Wherein the selection principle of N can comprise following one or more time delays and: the first, the time of N subframe is correctly decoded the up transmission of UE " ACK " in order to guarantee the source Serving cell.The second, minizone cooperation time delay, for example source Serving cell indicating target Serving cell handover success message is transmitted the time delay of shaking hands between source Serving cell and target serving district; Three, HARQ RTT time delay.The value of N can adopt the static default configuration or adopt the mode of semi-static signaling to inform UE.Can certainly not wait for for the 3rd scheduled time and be enabled in immediately and pass through the PDCCH receiving control information on the target serving district.
After sending " MAC control PDU " for the base station, in the situation that source Serving cell and target serving district send control information simultaneously, UE can stop at immediately the source Serving cell and receive PDCCH, is enabled in the reception of target serving district.
After sending " MAC control PDU " for the base station, situation about sending control information simultaneously in source Serving cell and target serving district, alternatively, UE also can be in by the target serving district receiving control information corresponding with index or cell ID, by source Serving cell receiving control information, until stable the switching finished.Afterwards, UE stops at source Serving cell receiving control information, and only at the target serving district receiving control information.Further, stable switching is finished and can be judged by following manner, certainly is not limited to following mode:
If the channel quality of target serving district is higher than the time of the channel quality of source Serving cell and was longer than for the 4th scheduled time, then only receive described control information by target serving district, namely stop to receive described control information by the source Serving cell.One timer can be set in UE, stablize the duration that receiving control information time span or signal quality are better than the source Serving cell to judge target serving district.
If UE receives the data message that the base station sends by the PDSCH channel by target serving district, then only by the target serving district receiving control information, namely stop by source Serving cell receiving control information.
If UE receives the feedback information (ACK/NACK) of the HARQ process of base station transmission by target serving district, then only by the target serving district receiving control information, namely stop by source Serving cell receiving control information.
If the control channel that receives target serving district that UE continues surpasses a period of time, then only by the target serving district receiving control information, namely stop by source Serving cell receiving control information.
If within the 5th scheduled time, do not receive control information by the source Serving cell, then only by the target serving district receiving control information, namely stop by source Serving cell receiving control information.That is to say that UE receives control information in target serving district, and the inherent source of certain hour Serving cell is not received control information, illustrates that the base station has stably switched to Serving cell on the target serving district.Each above-mentioned scheduled time, UE all can consult to set according to actual conditions with the base station in advance, and is special, and the scheduled time can be zero, namely starts immediately.
Alternatively, successfully do not obtain index or the cell ID of target serving district if the present embodiment also comprises UE, then return failure response information to the base station or do not respond, can prepare again to obtain " the MAC control PDU " that the base station sends.
In the Serving cell changing method that the present embodiment provides, UE carries out " the MAC control PDU " that Serving cell switches by the UE that is used to indicate that receives and the decoding base station sends, know fast handover information and in time carry out the switching of Serving cell, not only can shorten Serving cell switching time, guarantee the quick switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Above-mentioned each embodiment goes for but is not limited to following three kinds of different situations, is respectively:
The first situation, can think that high-rise control residential quarter is different from Serving cell (serving cell) concept that physical layer sends control information:
High-rise control residential quarter: manage high-rise related algorithm and function, for example RRM (Radio Resource Management hereinafter to be referred as: RRM), interface S1, radio bearer (Radio Bear between base station and the core net; Hereinafter to be referred as: RB) management etc.Can be the logic void cell (Virtual cell) that a cooperation cell set (CoMP set) forms, also can be LTE R8 conventional cell.For example RSRP, RSRQ, PL are as the switching signal quality references with the measured value of low channel variation, and handoff procedure is semi-static variation.
Serving cell (serving cell): the residential quarter that sends control information by PDCCH, for example CQI, PMI and CSI can be dynamic changes as the switching signal quality references with the measured value of fast channel variation.
The second situation, can think that the Serving cell (serving cell) that high-rise control residential quarter and physical layer send control information is same residential quarter, for example RSRP, RSRQ, PL are as the switching signal quality references with the measured value of low channel variation, and handoff procedure is semi-static variation.At this moment, can be in high-rise switching flow RRC signaling when indication for example, by the variation of " MAC control PDU " fast notification UE Serving cell, so that the PDCCH channel switched to first target serving district before high-rise switching flow is finished.And in the process of high-rise switching flow from beginning to finish, can adopt the method for the dynamic switching that above-described embodiment provides, notify fast UE handed over service residential quarter.Adopt the best residential quarter service of channel quality.
The third situation can think that the Serving cell that high-rise control residential quarter and physical layer send control information is same residential quarter, with the measured value of fast channel variation for example CQI, PMI and CSI as the switching signal quality references.In such cases, the base station can be judged within first scheduled time, if the channel quality of target serving district is higher than the channel quality of source Serving cell, just sent " MAC control PDU " to UE, and notice UE carries out the dynamic switching of Serving cell.That is to say, network side sends control information simultaneously in a plurality of residential quarters constantly, base station initiated timer, if the PDCCH signal quality of some residential quarters continues to be better than certain preset value behind timer expiry, this moment is in high-rise switching flow RRC signaling when indication for example, by the variation of " MAC control PDU " fast notification UE Serving cell.In above-described embodiment process, can set up the forwarding channel of control information between source Serving cell and the target serving district, namely increase the forwarding channel of the UE control information of setting up source Serving cell and target serving district, so that the source Serving cell uses identical control information with target serving district, and transmit control information by X2 interface in the minizone.When this forwarding channel was used for seamlessly transitting, the source Serving cell was transmitted to target serving district with the control information that it will send UE to, so that target serving district can send identical control information to UE simultaneously, the assurance data can not interrupted.This control information mainly comprises, the relevant information of transmitting at PDCCH, schedule information etc.
In the dynamic handoff procedure of Serving cell, after UE receives and switches indication, but not yet return response message, need to determine it is to the source Serving cell this moment, or return " ACK " or " NACK " message to target serving district, the present embodiment provides a solution.Physical Uplink Control Channel (PUCCH) is by the residential quarter that sends control information again assignment, and PUCCH information can be received simultaneously by single residential quarter or two residential quarters.Wherein assignment mode can comprise dual mode: the acquiescence send mode: clear feeds back used PUCCH resource by source Serving cell or target serving district distribution in the agreement; Or dominant indicating mode: dynamically indicated by PDCCH or " MAC control PDU " or the indication of RRC signaling by network side.Alternatively, UE is when returning response message, then according to the predetermined send mode in base station or according to the indication of base station, source Serving cell or target serving district in the base station send " ACK " or " NACK " message.Perhaps UE abandons this ACK/NACK feedback, and the base station thinks that this is sent as NACK, then resends " MAC control PDU ".
In the Serving cell switching instruction method that above embodiment provides and the service cell switching method, the conversion of UE Serving cell is in time notified in the base station by newly-built " MAC control PDU ", can shorten Serving cell switching time, guarantee the quick switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Fig. 3 is Serving cell switching instruction method embodiment two flow charts of the present invention, and as shown in Figure 3, the method comprises:
Step 300 is identified for the target serving district that sends control information for subscriber equipment;
UE is in the cordless communication network, and a plurality of residential quarters under the base station all can provide control information for this UE based on the CoMP technology, and certainly in order to guarantee the transmission success rate of control information, the base station can send to UE by the best residential quarter of channel quality with control information.Therefore UE measures the channel quality information of each residential quarter, and reports the base station, behind the channel quality information of each residential quarter that base station reception UE sends, reports selection Serving cell in the set (also being the candidate collection of scheduling) at CQI.Particularly, the channel quality information that the scheduler of inside of base station or RRC or MAC or higher layer entities report according to UE is defined as the target serving district that UE provides control information, selects namely that the best residential quarter of channel quality provides control information as new Serving cell for UE in each residential quarter.Wherein said channel quality information comprises the measured value of fast channel variation of channel and/or the measured value of low channel variation alternatively, wherein the measured value of fast channel variation comprises CQI, PMI and CSI, and the measured value of low channel variation comprises RSRP, RSRQ and PL.Described measured value both can comprise that the out-hole run result also can comprise the measurement result of down-run survey result such as SRS, PUSCH channel etc.
Step 301 generates and is used to indicate described subscriber equipment switches to described target serving district from the source Serving cell switch indicating information, and described switch indicating information comprises index or the cell ID of described target serving district;
Step 302 sends described switch indicating information by physical layer control channel to described subscriber equipment.
The base station need in time be notified the target serving district of selecting to UE after having chosen target serving district, and the base station is by physical layer control channel in the present embodiment, and for example PDCCH notifies UE.Particularly, the base station sends switch indicating information to UE in physical layer control channel, and carries index or the cell ID of target serving district.The index of wherein said target serving district can pass through the index value of the semi-static notice UE candidate cell of high-level signaling in advance.UE can switch to the target serving district receiving control information after receiving the switch indicating information that sends by physical layer control channel immediately.
The Serving cell switching instruction method that the present embodiment provides, with the advice method similar process of " MAC control PDU ", difference is that the base station does not need ACK to confirm in the method, but guarantees by PDCCH self channel design.The switching of the present embodiment by physical layer control channel fast notification UE target serving district can be shortened Serving cell switching time, guaranteed the dynamic switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Fig. 4 is Serving cell changing method embodiment two flow charts of the present invention, and as described in Figure 4, the method comprises:
UE measures the channel quality information of each residential quarter, and reports the base station, behind the channel quality information of each residential quarter that base station reception UE sends, dynamically selects Serving cell; And send switch indicating information by physical layer control channel to UE, wherein carry index or the cell ID of target serving district.UE receives switch indicating information.
Step 401 is by the target serving district receiving control information corresponding with described index or cell ID.
UE according to index or the cell ID of its target serving district of carrying, receives the control information that the base station issues by target serving district after receiving the switch indicating information of base station by the physical layer control channel transmission.
In the Serving cell changing method that the present embodiment provides, UE is known handover information and in time carry out the switching of Serving cell fast by physical layer control channel, not only can shorten Serving cell switching time, has guaranteed the dynamic switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Above-mentioned each embodiment equally also goes for but is not limited to following three kinds of different situations, is respectively:
The first situation, can think that high-rise control residential quarter is different from Serving cell (serving cell) concept that physical layer sends control information:
High-rise control residential quarter: manage high-rise related algorithm and function, such as RRM, S1, RB management etc.Can be the logic void cell (Virtual cell) that a cooperation cell set (CoMP set) forms, also can be the R8 conventional cell.For example RSRP, RSRQ, PL are as the switching signal quality references with the measured value of low channel variation, and handoff procedure is semi-static variation.
Serving cell (serving cell): the residential quarter that sends control information, for example CQI, PMI and CSI can be dynamic changes as the switching signal quality references with the measured value of fast channel variation.
The second situation can think that the Serving cell that high-rise control residential quarter and physical layer send control information is same residential quarter, and for example RSRP, RSRQ, PL are as the switching signal quality references with the measured value of low channel variation, and handoff procedure is semi-static variation.
The third situation can think that the Serving cell that high-rise control residential quarter and physical layer send control information is same residential quarter, with the measured value of fast channel variation for example CQI, PMI and CSI as the switching signal quality references.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 5 is embodiment one structural representation in base station of the present invention, as described in Figure 5, this base station comprises the first determination module 11, the first generation module 12 and the first sending module 13, and wherein the first determination module 11 is for the target serving district that is identified for sending control information for UE; The first generation module 12 is used for generation and is used to indicate UE switches to target serving district from the source Serving cell " MAC control PDU ", comprising index or the cell ID of target serving district; The first sending module 13 is used for being somebody's turn to do " MAC control PDU " to the UE transmission.
Particularly, CoMP UE is in the cordless communication network, and in order to guarantee the transmission success rate of control information, the base station need to send to UE by the best residential quarter of channel quality with control information.Therefore UE measures the channel quality information of each residential quarter, and reports the base station, behind the channel quality information of each residential quarter that the first determination module 11 reception UE in the base station send, dynamically selects Serving cell.Particularly, the channel quality information that the base station reports according to UE is defined as the target serving district that UE provides control information, selects namely that the best residential quarter of channel quality provides control information as new Serving cell for UE in each residential quarter.Wherein said channel quality information can comprise the measured value of fast channel variation of channel and/or the measured value of low channel variation.After the first determination module 11 has been chosen target serving district, generate MAC control packet data unit information i.e. " MAC control PDU " by the first generation module 12 according to the index of target serving district or cell ID.Then, by the first sending module 13 " the MAC control PDU " that the first generation module 12 generates sent to UE.The first sending module 13 can also within first scheduled time, if the channel quality of target serving district is higher than the channel quality of source Serving cell, send " MAC control PDU " to UE.Certainly, the first generation module 12 also can be packaged into " MAC PDU " with other control informations with " MAC control PDU ", and sends to UE by the first sending module 13.
Can also comprise the first processing module 14 in the base station that the present embodiment provides, if the first processing module 14 concrete " ACK " message that are used for receiving the UE transmission then send described control information by target serving district.Perhaps be used for after waiting for for second scheduled time, sending described control information by source Serving cell and target serving district simultaneously, and after " ACK " message that receives the UE transmission, stopping to send control information by the source Serving cell.If perhaps be used for receiving " NACK " message that UE sends, then indicate the first sending module 13 again to send to UE and comprise the index of target serving district or " the MAC control PDU " of cell ID.
In addition, the first sending module 13 also was used for if the channel quality of target serving district is higher than the channel quality of source Serving cell, then sending " MAC control PDU " to UE within first scheduled time.
Comprise also in the base station that being used to indicate UE sends the first indicating module 15 of confirming response message or failure response information to the source Serving cell or to target serving district, the first indicating module 15 can be indicated by the dynamic indication of PDCCH or the modes such as " MAC control PDU " or the indication of RRC signaling, and UE can return response message to the residential quarter of regulation according to indication or the default setting of base station.
New " the MAC control PDU " that Serving cell switches carried out by increasing a kind of UE of being used to indicate in the base station that the present embodiment provides, the switching of fast notification UE target serving district, can shorten Serving cell switching time, guarantee the dynamic switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Fig. 6 is subscriber equipment embodiment one structural representation of the present invention, as described in Figure 6, this UE comprises the first acquisition module 21 and the first receiver module 22, and wherein the first acquisition module 21 is used for obtaining UE switches to target serving district from the source Serving cell " the MAC control PDU " that be used to indicate of network side transmission; The first receiver module 22 is used for by the target serving district receiving control information corresponding with index or cell ID.
Particularly, UE measures the channel quality information of each residential quarter, and reports the base station, behind the channel quality information of each residential quarter that base station reception UE sends, dynamically selects Serving cell; And generate and to be used to indicate UE switches to target serving district from the source Serving cell " MAC control PDU ", wherein carry index or the cell ID of target serving district.The first acquisition module 21 among the UE receives and " MAC control PDU " is somebody's turn to do in parsing, if successfully get access to index or the cell ID of target serving district, then the first receiver module 22 returns " ACK " message to the base station, and by the target serving district receiving control information corresponding with index or cell ID.Certainly, the first receiver module 22 receives control channel information in target serving district, can start immediately, also can be to start after waiting for for the 3rd scheduled time.
In addition, the first receiver module 22 also is used in by the target serving district receiving control information corresponding with index or cell ID, by source Serving cell receiving control information.The UE that the present embodiment provides also comprises the 3rd sending module 23, be used for according to and the predetermined send mode in base station or according to the indication of base station, source Serving cell or target serving district in the base station are returned " ACK " or " NACK " message.Described predetermined send mode is the acquiescence send mode: clear feeds back used PUCCH resource by source Serving cell or target serving district distribution in the agreement.The indication of base station comprises that the base station passes through PDCCH dynamically indication or " MAC control PDU " or the indication of RRC signaling etc.
The subscriber equipment that the present embodiment provides is in time known the conversion of Serving cell by receiving newly-built " the MAC control PDU " in base station, can shorten Serving cell switching time, has guaranteed the dynamic switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Fig. 7 is that network system embodiment one of the present invention forms schematic diagram, as shown in Figure 7, this network system comprises that base station 1 and subscriber equipment are UE2, wherein base station 1 is for the target serving district that is identified for sending control information for UE2, send UE2 switches to target serving district from the source Serving cell " the MAC control PDU " that be used to indicate that generates to UE2, carry index or the cell ID of target serving district; UE2 is used for obtaining " the MAC control PDU " that base station 1 sends, and by the target serving district receiving control information corresponding with index or cell ID.
Base station and subscriber equipment that the base station that relates in the network system that the present embodiment provides and subscriber equipment can adopt above-described embodiment to provide, concrete structure and function repeat no more herein.In the network system that the present embodiment provides, new " the MAC control PDU " that Serving cell switches carried out by increasing a kind of UE of being used to indicate in the base station, and the switching of fast notification UE target serving district can be shortened Serving cell switching time.
Fig. 8 is embodiment two structural representations in base station of the present invention, as shown in Figure 8, this base station comprises the second determination module 31, the second generation module 32 and the second sending module 33, and wherein the second determination module 31 is for the target serving district that is identified for sending control information for UE; The second generation module 32 is used for generation and is used to indicate UE switches to described target serving district from the source Serving cell switch indicating information, and this switch indicating information comprises index or the cell ID of described target serving district; The second sending module 33 is used for sending described switch indicating information by physical layer control channel to UE.
Particularly, CoMP UE is in the cordless communication network, and in order to guarantee the transmission success rate of control information, the base station need to send to UE by the best residential quarter of channel quality with control information.Therefore UE measures the channel quality information of each residential quarter, and report the base station, behind the channel quality information of each residential quarter that the second determination module 31 reception UE in the base station send, dynamically select Serving cell, select namely that the best residential quarter of channel quality provides control information as new Serving cell for UE in each residential quarter.Wherein said channel quality information can comprise the measured value of fast channel variation of channel and/or the measured value of low channel variation.After the second determination module 31 determines target serving district, the target serving district of selecting in time need to be notified to UE, the second sending module 33 in the present embodiment in the base station sends switch indicating information to UE in physical layer control channel, and carries index or the cell ID of target serving district.UE can switch to the target serving district receiving control information after receiving the switch indicating information that sends by physical layer control channel immediately.
The switching of the base station that the present embodiment provides by physical layer control channel fast notification UE target serving district can be shortened Serving cell switching time, guaranteed the dynamic switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Fig. 9 is subscriber equipment embodiment two structural representations of the present invention, as shown in Figure 9, this UE comprises the second acquisition module 41 and the second receiver module 42, wherein the second acquisition module 41 is used for obtaining network side by UE switches to target serving district from the source Serving cell the switch indicating information that is used to indicate of physical layer control channel transmission, and this switch indicating information comprises index or the cell ID of target serving district; The second receiver module 42 is used for by the target serving district receiving control information corresponding with index or cell ID.
Particularly, UE measures the channel quality information of each residential quarter, and reports the base station, behind the channel quality information of each residential quarter that base station reception UE sends, dynamically selects Serving cell; And send switch indicating information by physical layer control channel to UE, wherein carry index or the cell ID of target serving district.After the second acquisition module 41 among the UE receives switch indicating information by physical layer control channel, index or the cell ID of the target serving district of being carried according to switch indicating information by the second receiver module 42 receive the control information that the base station issues by target serving district.
The UE that the present embodiment provides is known handover information and in time carry out the switching of Serving cell fast by physical layer control channel, not only can shorten Serving cell switching time, has guaranteed the dynamic switching of Serving cell; And switch data does not interrupt in the handoff procedure, realizes taking over seamlessly.
Figure 10 is that network system embodiment two of the present invention forms schematic diagram, as shown in figure 10, this network system comprises that base station 3 and subscriber equipment are UE4, wherein base station 3 is for the target serving district that is identified for sending control information for UE4, and send to UE4 by physical layer control channel and to be used to indicate UE4 switches to target serving district from the source Serving cell switch indicating information, this switch indicating information comprises index or the cell ID of target serving district; UE4 is used for obtaining the switch indicating information that base station 3 sends, and by the target serving district receiving control information corresponding with index or cell ID.
Base station and subscriber equipment that the base station that relates in the network system that the present embodiment provides and subscriber equipment can adopt above-described embodiment to provide, concrete structure and function repeat no more herein.In the network system that the present embodiment provides, the base station is notified the switching of UE target serving district rapidly by physical layer control channel, can shorten Serving cell switching time.
The function that above-described embodiment small area is realized can also be finished by AP, here the relation of AP and traditional residential quarter (cell) can be that a residential quarter comprises an AP, or a residential quarter comprises a plurality of AP, above-described embodiment can be regarded the example that a residential quarter only comprises an AP as, and namely the residential quarter is corresponding one by one with AP; Obviously, when comprising a plurality of AP a residential quarter, each AP can be equivalent to a cooperation cell, also can realize the embodiment of the invention.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (22)
1. a Serving cell switching instruction method is characterized in that, comprising:
Be identified for the target serving district that sends control information for subscriber equipment;
Generation is used to indicate described subscriber equipment switches to described target serving district from the source Serving cell MAC sublayer control packet data unit information, and described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
Send described MAC sublayer control packet data unit information to described subscriber equipment.
2. Serving cell switching instruction method according to claim 1 is characterized in that, described being identified for comprises for the target serving district that subscriber equipment sends control information:
The channel quality information of each residential quarter that sends according to described subscriber equipment, be identified for the target serving district that sends control information for described subscriber equipment, described channel quality information comprises the measured value of fast channel variation of channel and/or the measured value of low channel variation.
3. Serving cell switching instruction method according to claim 1 is characterized in that, describedly sends described MAC sublayer control packet data unit information to described subscriber equipment and is specially:
By hybrid automatic repeat request process, send described MAC sublayer control packet data unit information to described subscriber equipment.
4. Serving cell switching instruction method according to claim 1 is characterized in that, describedly sends described MAC sublayer control packet data unit information to described subscriber equipment and comprises:
If within first scheduled time, the channel quality of described target serving district is higher than the channel quality of described source Serving cell, then sends described MAC sublayer control packet data unit information to described subscriber equipment.
5. according to claim 1 to 4 arbitrary described Serving cell switching instruction methods, it is characterized in that, described method also comprises:
If receive the affirmation response message that described subscriber equipment sends, then only send described control information by described target serving district.
6. according to claim 1 to 4 arbitrary described Serving cell switching instruction methods, it is characterized in that, describedly after described subscriber equipment sends described MAC sublayer control packet data unit information, also comprise:
After waiting for for second scheduled time, send described control information by source Serving cell and described target serving district simultaneously, and after the affirmation response message that receives described subscriber equipment transmission, stop to send described control information by described source Serving cell.
7. according to claim 1 to 4 arbitrary described Serving cell switching instruction methods, it is characterized in that, described method also comprises:
If receive the failure response information that described subscriber equipment sends, then again send described MAC sublayer control packet data unit information to described subscriber equipment.
8. Serving cell switching instruction method according to claim 6, it is characterized in that, described method also comprises: set up forwarding channel between described source Serving cell and the described target serving district, be used for transmitting described control information between described source Serving cell and described target serving district.
9. a Serving cell changing method is characterized in that, comprising:
Obtain subscriber equipment switches to target serving district from the source Serving cell the MAC sublayer control packet data unit information that is used to indicate of network side transmission, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
By the target serving district receiving control information corresponding with described index or cell ID.
10. Serving cell changing method according to claim 9 is characterized in that, describedly comprises by the target serving district receiving control information corresponding with described index or cell ID:
Behind the index that successfully obtains described target serving district or cell ID, return the affirmation response message, even exist side by side after waiting for for the 3rd scheduled time, by the target serving district receiving control information corresponding with described index or cell ID.
11. according to claim 9 or 10 described Serving cell changing methods, it is characterized in that, described by the target serving district receiving control information corresponding with described index or cell ID the time, also receive described control information by described source Serving cell.
12. Serving cell changing method according to claim 11 is characterized in that, described method also comprises:
If the channel quality of described target serving district is higher than the time of the channel quality of described source Serving cell and was longer than for the 4th scheduled time, then only receive described control information by described target serving district; Or
If receive the data message that network side sends by described target serving district, then only receive described control information by described target serving district; Or
If within the 5th scheduled time, do not receive control information by described source Serving cell, then only receive described control information by described target serving district.
13. Serving cell changing method according to claim 10 is characterized in that, described method also comprises:
If successfully do not obtain index or the cell ID of described target serving district, then return failure response information or do not respond.
14. Serving cell changing method according to claim 13 is characterized in that:
Described returning confirms that response message or the described failure response information of returning are specially according to predetermined send mode or network side indication, return described affirmation response message or described failure response information to described source Serving cell or described target serving district.
15. a base station is characterized in that, comprising:
The first determination module is for the target serving district that is identified for sending control information for subscriber equipment;
The first generation module, be used for generation and be used to indicate described subscriber equipment switches to described target serving district from the source Serving cell MAC sublayer control packet data unit information, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
The first sending module is used for sending described MAC sublayer control packet data unit information to described subscriber equipment.
16. base station according to claim 15 is characterized in that, also comprises the first processing module, described the first processing module is used for:
If receive the affirmation response message that described subscriber equipment sends, then send described control information by described target serving district; Perhaps
After waiting for for second scheduled time, send described control information by source Serving cell and described target serving district simultaneously, and after the affirmation response message that receives described subscriber equipment transmission, stop to send described control information by described source Serving cell; Perhaps
If receive the failure response information that described subscriber equipment sends, then indicate described the first sending module again to send described MAC sublayer control packet data unit information to described subscriber equipment.
17. base station according to claim 16, it is characterized in that, described the first sending module also is used within first scheduled time, if the channel quality of described target serving district is higher than the channel quality of described source Serving cell, then send described MAC sublayer control packet data unit information to described subscriber equipment.
18. base station according to claim 17 is characterized in that, also comprises:
The first indicating module is used to indicate described subscriber equipment and sends affirmation response message or failure response information to described source Serving cell or described target serving district.
19. a subscriber equipment is characterized in that, comprising:
The first acquisition module, be used for obtaining subscriber equipment switches to target serving district from the source Serving cell the MAC sublayer control packet data unit information that is used to indicate of network side transmission, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
The first receiver module is used for by the target serving district receiving control information corresponding with described index or cell ID.
20. subscriber equipment according to claim 19, it is characterized in that, the first receiver module also is used for receiving described control information by described source Serving cell in by the target serving district receiving control information corresponding with described index or cell ID.
21. according to claim 19 or 20 described subscriber equipmenies, it is characterized in that, also comprise:
The 3rd sending module, be used for according to and the predetermined send mode in base station or according to the indication of described base station, the described source Serving cell in the described base station or described target serving district send confirms response message or failure response information.
22. a network system is characterized in that, comprising:
The base station, for the target serving district that is identified for sending control information for described subscriber equipment, send described subscriber equipment switches to described target serving district from the source Serving cell the MAC sublayer control packet data unit information that is used to indicate that generates to described subscriber equipment, described MAC sublayer control packet data unit information comprises index or the cell ID of described target serving district;
Subscriber equipment is used for obtaining the described MAC sublayer control packet data unit information that described base station sends, and by the target serving district receiving control information corresponding with described index or cell ID.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2009/071429 WO2010121429A1 (en) | 2009-04-23 | 2009-04-23 | Method for indicating switching of service cells, method and apparatus for switching service cells |
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| CN102100104B true CN102100104B (en) | 2013-02-27 |
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| WO2014153783A1 (en) * | 2013-03-29 | 2014-10-02 | 华为技术有限公司 | Cell switching method, device and system for user equipment |
| CN112187380B (en) * | 2019-07-01 | 2023-04-07 | 中国移动通信集团浙江有限公司 | Serving cell switching method and device |
| CN112118607B (en) * | 2020-10-12 | 2023-04-18 | 中国联合网络通信集团有限公司 | Cell switching method, terminal and base station |
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| CN1635819A (en) * | 2005-01-06 | 2005-07-06 | 东南大学 | Quick switching method for physical layer of mobile communication system |
| CN101052205A (en) * | 2006-04-04 | 2007-10-10 | 中兴通讯股份有限公司 | User's terminal switch control method in mobile communication system |
| CN101128039A (en) * | 2006-08-16 | 2008-02-20 | 大唐移动通信设备有限公司 | Hard switching method in mobile communication and wireless network controller using this method |
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