CN102958187A - Random access method in isomerical mobile communication network - Google Patents
Random access method in isomerical mobile communication network Download PDFInfo
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- CN102958187A CN102958187A CN2011102412089A CN201110241208A CN102958187A CN 102958187 A CN102958187 A CN 102958187A CN 2011102412089 A CN2011102412089 A CN 2011102412089A CN 201110241208 A CN201110241208 A CN 201110241208A CN 102958187 A CN102958187 A CN 102958187A
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Abstract
An embodiment of the invention relates to a random access method in the isomerical mobile communication network. In the embodiment, a service base station distributes different uplink random access resources for interference risk user equipment and non-interference risk user equipment, can determine whether user equipment has interference risks or not by carrying resources of random access precursors, and transmits random access response and conflict solution by different resources according to the fact that whether the user equipment has interference risk or not. By the random access method, different downlink resources are distributed according to different interference conditions, total success rate in the process of random access in the system is increased, and network resources are saved.
Description
Technical field
The present invention relates to mobile communication technology, more specifically, relate to the accidental access method in the isomery mobile communications network.
Background technology
In order to satisfy the quick demand of data, services, operator comprises that also slight node (pico node), femto nodes (femto node), via node and less radio-frequency zoom out so-called " low transmission power nodes " such as (RRH) and be introduced into extended network covering and systematic function except disposing macrocellular.In such heterogeneous network (HetNet), be in overlapping covered user and can be subject to stronger presence of intercell interference, need take the Inter-Cell Interference Coordination scheme, for example the resource in the time interval of some in the residential quarter (for example subframe) adopts lower transmitting power and/or reduces the strong interference of its activity to avoid neighbor cell is caused for this reason.In the LTE-Advanced system, be referred to as approximate empty subframe (Almost Blank Subframe, ABS).
When subscriber equipment (UE) is transformed into Radio Resource control connection (RRC-connected) state from idle (RRC-idle) state of Radio Resource control, or execution RRC connection rebulids, or up link is in step-out and UE has in the new situations such as upstream data arrival, and UE need carry out random access (RA) operation.As shown in Figure 1, start from the transmission of UE side random access guiding (Random Access Preamble) based on the random access procedure of competition, eNB beams back accidental access response (Random Access Response) subsequently, UE carries out corresponding scheduled transmission (Scheduled Transmission) according to the indication of eNB, the last eNB solution (Contention Resolution) that conflicts, above-mentioned mutual signaling is also referred to as message 1, message 2, message 3, message 4 successively.
In homogeneous network was disposed, UE can be linked in the Serving cell with the strongest received signal strength usually, therefore can finish reliably random access.And in heterogeneous network, the gain that brings for obtaining cell splitting, can consider the service traffics of macrocellular are unloaded in Pico cell and/or the femtocell, perhaps because closed user group (Closed Subscriber Group, CSG) restriction, UE probably can not access has the Serving cell of strong received signal strength.Therefore the deployment meeting of heterogeneous network brings impact to the reliability of random access procedure.
Fig. 2 shows the deployment scenario of an isomery mobile communications network, there is shown macro base station 21, femto base station 23 and Serving cell separately thereof, and subscriber equipment 22.Subscriber equipment 22 does not belong to the closed user group membership of femto base station 23, when its near femto residential quarter and carry out random access operation because it can not access the femto residential quarter, will have to be connected in the macrocell.In the case, dispatch at unprotected running time-frequency resource if come from message 2 and the message 4 of macrocell, be subject to coming from the femto residential quarter than strong jamming, thereby cause the failure of random access attempts.Subscriber equipment 22 can repeat random access, can't access if reach maximum preamble transmission number of times, can report radio jink failure.
Fig. 3 shows the deployment scenario of another isomery mobile communications network, there is shown macro base station 31, pico base station 33 and Serving cell separately thereof, and subscriber equipment 32, the dotted line ring represents the service range extended area (range extension zone) of pico base station among the figure.In scene shown in Figure 3, for example in initial access or handoff procedure, subscriber equipment 32 has selected to have the pico residential quarter of relatively low received signal strength for obtaining more excellent cell splitting gain.Because subscriber equipment 32 residing disturbance regimes are not known to the pico base station 33, it may send message 2 and message 4 in non-protection running time-frequency resource, thus may be subject to coming from macrocell than strong jamming, so the probability of random access failure is also higher.
In above-mentioned scene, for avoid may meeting with in 4 transmission of message 2 and message than strong jamming, one comparatively directly method be will send to message 2 of all subscriber equipmenies of carrying out random access and message 4 scheduling in shielded running time-frequency resource.Particularly, for in the LTE-A system as shown in Figure 2 under the scene, allow non-closed user group membership's UE always when the femto cell configuration becomes approximate empty subframe (ABS), receive the message 2 and the message 4 that come from macrocell, but there is following drawback in this scheme:
(1) larger access delay, particularly for the UE that is in less interference, will have to wait for until in the chance of ABS subframe receipt message 2 and message 4, time delay will be closely related with the density of abs mode this moment.If adopt larger abs mode density that more message 2 and the transmission opportunity of message 4 are provided, can limit the flexibility of ABS configuration, even can be take the sacrificial system throughput as cost.
(2) be subject to the capacity of control channel: scheduling indication transmission in Physical Downlink Control Channel (PDCCH) of message 2 and message 4 more properly, is to transmit in the PDCCH that configures AB S; For example in scene shown in Figure 2, when the number of users of carrying out random access in macrocell was more, the limited degree of this control channel capacity can be larger.
Summary of the invention
An object of the present invention is to overcome above-mentioned shortcoming of the prior art, the new random access scheme in the isomery mobile communications network is provided.
The present invention is applicable to the system such as but not limited to LTE-A.Alleged base station comprises macro base station and low transmission power node among the present invention, and macro base station is such as but not limited to evolved Node B (eNB), and the low transmission power node is such as but not limited to pico base station, femto base station.The isomery mobile communications network refers to the mobile communications network of mixed deployment macro base station and low transmission power node.Macro base station and low transmission power node be xenogenesis base station each other each other.
In one embodiment, proposed the accidental access method in a kind of isomery mobile communications network comprising a subscriber equipment, its serving BS and adjacent xenogenesis base station, having comprised:
I. whether described subscriber equipment basis has risk of interferences use respective resources transmission random access guiding;
Ii. described serving BS determines according to the employed resource of random access guiding that receives whether described subscriber equipment has risk of interferences, if described subscriber equipment has risk of interferences, then send accidental access response in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station;
Iii. described subscriber equipment sends scheduled transmission;
If iv. described subscriber equipment has risk of interferences, described serving BS sends conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solves.
In another embodiment, proposed the accidental access method in a kind of isomery mobile communications network comprising a subscriber equipment, its serving BS and adjacent xenogenesis base station, having comprised:
III. described subscriber equipment sends scheduled transmission, the indication information that whether has risk of interferences comprising described subscriber equipment to described serving BS behind the accidental access response that receives from described serving BS;
IV. described serving BS sends the conflict solution according to described indication information, if described indication information indicates described subscriber equipment to have risk of interferences, then described serving BS sends conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solves.
In one embodiment, proposed to be used in a kind of base station in the isomery mobile communications network method of the random access of a subscriber equipment, having comprised:
-broadcasting is with indication risk of interferences subscriber equipment and ascending resource corresponding to non-risk of interferences subscriber equipment difference;
-determine according to the employed resource of random access guiding that receives whether described subscriber equipment has risk of interferences, if described subscriber equipment has risk of interferences, then send accidental access response in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station;
If-described subscriber equipment has risk of interferences, then send conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solve.
The method that is used for random access in a kind of subscriber equipment in the isomery mobile communications network correspondingly comprises:
-receive from the broadcasting of serving BS and distinguish corresponding ascending resource to know risk of interferences subscriber equipment and non-risk of interferences subscriber equipment;
-determine whether to have risk of interferences based on the signal reception situation from described serving BS and adjacent xenogenesis base station;
Whether-basis has risk of interferences is used respective resources to send random access guiding.
In another embodiment, proposed to be used in a kind of base station in the isomery mobile communications network method of the random access of a subscriber equipment, having comprised:
-reception is from the scheduled transmission of subscriber equipment, the indication information that whether has risk of interferences comprising described subscriber equipment;
-send conflict according to described indication information to solve, if described indication information indicates described subscriber equipment to have risk of interferences, then send conflict in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station and solve.
The method that is used for random access in a kind of subscriber equipment in the isomery mobile communications network correspondingly comprises:
-determine whether to have risk of interferences based on the signal reception situation from serving BS and adjacent xenogenesis base station;
-send scheduled transmission, the indication information that whether has risk of interferences comprising described subscriber equipment to described serving BS.
In the above-described embodiments, when the serving BS of subscriber equipment was macro base station, adjacent xenogenesis base station was the low transmission power node; When the serving BS of subscriber equipment was the low transmission power node, adjacent xenogenesis base station was macro base station.
The method that provides in the application of the invention can improve the reliability of the random access of subscriber equipment in the isomery mobile communications network.
Description of drawings
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows in the LTE-A system based on the random access procedure of competing;
Fig. 2 shows the deployment scenario of an isomery mobile communications network;
Fig. 3 shows the deployment scenario of another isomery mobile communications network;
Fig. 4 shows the flow chart of the accidental access method in the isomery mobile communications network comprising a subscriber equipment, its serving BS and adjacent xenogenesis base station according to an embodiment of the invention;
Fig. 5 shows the flow chart of the accidental access method in the isomery mobile communications network that comprises a subscriber equipment, its serving BS and adjacent xenogenesis base station according to another embodiment of the invention;
Fig. 6 shows the flow chart of the method that is used for the random access of a subscriber equipment in the base station in the isomery mobile communications network according to an embodiment of the invention;
Fig. 7 shows the flow chart that is used for the method for random access in the subscriber equipment in the isomery mobile communications network according to an embodiment of the invention;
Fig. 8 shows the flow chart of the method that is used for the random access of a subscriber equipment in according to another embodiment of the invention the base station in the isomery mobile communications network;
Fig. 9 shows the flow chart that is used for the method for random access in according to another embodiment of the invention the subscriber equipment in the isomery mobile communications network;
In the drawings, run through different diagrams, same or similar Reference numeral represents characteristic of correspondence.
Embodiment
Fig. 4 shows the flow chart of the accidental access method in the isomery mobile communications network comprising a subscriber equipment, its serving BS and adjacent xenogenesis base station according to an embodiment of the invention.The method is used for the random access procedure between subscriber equipment 42 and its serving BS 41, and the downstream signal of subscriber equipment 42 receptions may be subject to the strong interference of adjacent xenogenesis base station (with serving BS xenogenesis base station each other) and have risk of interferences.As shown in the figure, the method comprising the steps of 410,420,430,440.
In step 410, whether subscriber equipment 42 bases have risk of interferences is used respective resources to send random access guiding (message 1).Particularly, have risk of interferences and send random access guiding with different ascending resources respectively with the subscriber equipment that does not have risk of interferences, and such resource division is known for subscriber equipment and serving BS, whether has risk of interferences thereby serving BS can go out to send according to the resource identification of carrying random access guiding the subscriber equipment of this random access guiding.
In step 420, serving BS 41 determines according to the employed resource of random access guiding that receives whether subscriber equipment 41 has risk of interferences, if subscriber equipment has risk of interferences, then send accidental access response (message 2) in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station.Like this, can avoid the downstream signal of adjacent xenogenesis base station for the interference of the accidental access response of serving BS as far as possible, improve the successful receiving rate of accidental access response.
In step 430, subscriber equipment 42 sends scheduled transmission (message 3).
In step 440, if subscriber equipment 42 has risk of interferences, serving BS 41 sends conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solves (message 4).Like this, can avoid the downstream signal of adjacent xenogenesis base station for the interference of the conflict solution of serving BS as far as possible, improve the successful receiving rate that conflict solves.
Correspondingly, if subscriber equipment 42 does not have risk of interferences, serving BS 41 can send accidental access responses corresponding to other subframes outside the subframe of the descending approximate empty subframe of adjacent xenogenesis base station and conflict solves.Like this, the downlink resource of random access procedure is able to reasonable distribution, thereby can support more how close simultaneous random access, and distributes different downlink resources according to the difference of disturbed condition, improve the overall success rate of the random access procedure in the system, thereby saved Internet resources.
Alternatively, also comprised step 405 (not shown) of being carried out by serving BS 41 before step 410: broadcasting is with indication risk of interferences subscriber equipment and ascending resource corresponding to non-risk of interferences subscriber equipment difference.
Particularly, serving BS is to have the subscriber equipment of risk of interferences to distribute respectively different uplink random access resources with the subscriber equipment that does not have risk of interferences, and informs all subscriber equipmenies in its service area by broadcasting.Such resource division can be that running time-frequency resource is divided, and also can be a yard territory resource division.
Serving BS can be realized the running time-frequency resource division by the Physical Random Access Channel configuration index (PRACH ConfigurationIndex) that strengthens.For example, configuration index is to represent that subscriber equipment that the PRACH that the subframe 1 in the even frame is configured is used for having risk of interferences sent message 1, PRACH that the subframe 1 of odd-numbered frame is configured is used for non-risk of interferences subscriber equipment and sends message 1 at 3 o'clock.Again for example, configuration index is to represent that the PRACH that the subframe 1 in each frame is configured was used for the risk of interferences subscriber equipment and sends message 1 at 6 o'clock; The subscriber equipment that the PRACH that subframe 6 in each frame is configured is used for non-risk of interferences sends message 1.
Serving BS also can be the random access guiding set different with non-risk of interferences user equipment allocation of risk of interferences subscriber equipment (code territory resource division).The risk of interferences subscriber equipment can be selected leading in the leading set that keeps for the risk of interferences subscriber equipment at random, but not that the risk of interferences subscriber equipment can be selected in the leading set that keeps for non-risk of interferences subscriber equipment at random is leading.
For above-mentioned two kinds of uplink random access resources dividing mode, the base station can be according to the information such as number of load state, risk of interferences subscriber equipment and the Fei Fei risk of interferences subscriber equipment of random access, and dynamic or semi-static ground resource allocation is divided.
Particularly, before step 410, can also comprise step 407 (not shown) of being carried out by subscriber equipment 42: determine whether to have risk of interferences based on the signal reception situation from serving BS 41 and adjacent xenogenesis base station.
For example, subscriber equipment 42 can judge whether to have risk of interferences according to Reference Signal Received Power (RSRP), when from serving BS 41 with from poor (or ratio) of the Reference Signal Received Power of adjacent xenogenesis base station less than a predetermined threshold, then be judged to be and have risk of interferences, otherwise then do not have risk of interferences.Again for example, subscriber equipment 42 can judge whether to have risk of interferences according to Reference Signal Received Quality (RSRQ), when from serving BS 41 with from poor (or ratio) of the Reference Signal Received Quality of adjacent xenogenesis base station less than a predetermined threshold, then be judged to be and have risk of interferences, otherwise then do not have risk of interferences.
Above-mentioned method both can be applied to scene shown in Figure 2, also can be applied to scene shown in Figure 3.When being applied to scene shown in Figure 2, subscriber equipment 42 is corresponding to subscriber equipment 22, and serving BS 41 is corresponding to macro base station 21, and adjacent xenogenesis base station is corresponding to femto base station 23.When being applied to scene shown in Figure 3, subscriber equipment 42 is corresponding to subscriber equipment 32, and serving BS 41 is corresponding to pico base station 33, and adjacent xenogenesis base station is corresponding to macro base station 31.
Fig. 5 shows the flow chart of the accidental access method in the isomery mobile communications network that comprises a subscriber equipment, its serving BS and adjacent xenogenesis base station according to another embodiment of the invention.The method is used for the random access procedure between subscriber equipment 52 and its serving BS 51, and the downstream signal of subscriber equipment 52 receptions may be subject to the strong interference of adjacent xenogenesis base station (with serving BS xenogenesis base station each other) and have risk of interferences.As shown in the figure, the method comprising the steps of 530,540.
In step 530, subscriber equipment 52 sends scheduled transmission (message 3) to serving BS 51 behind the accidental access response (message 2) that receives from serving BS 51, the indication information that whether has risk of interferences comprising subscriber equipment 52.
In step 540, serving BS 51 sends conflict according to the described indication information in the scheduled transmission and solves (message 4).If described indication information equipment for indicating user 52 has risk of interferences, then serving BS 51 sends conflict in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station and solves.Like this, can avoid the downstream signal of adjacent xenogenesis base station for the interference of the conflict solution of serving BS as far as possible, improve the successful receiving rate that conflict solves.
Correspondingly, if indication information equipment for indicating user 52 does not have risk of interferences, serving BS 51 can send accidental access responses corresponding to other subframes outside the subframe of the descending approximate empty subframe of adjacent xenogenesis base station and conflict solves.Like this, the downlink resource of random access procedure is able to reasonable distribution, thereby can support more how close simultaneous random access, and distributes different downlink resources according to the difference of disturbed condition, improve the overall success rate of the random access procedure in the system, thereby saved Internet resources.
In the LTE system, subscriber equipment sends RRC (radio resource control layer) connection request in scheduled transmission (message 3) or RRC reconnects request.Indication information in the scheduled transmission that sends in the step 530 can utilize original field, for example connects and sets up reason (Establishment Cause) field or connection re-establishment reason (Reestablishment Cause) field.Can be two kinds of new values of above-mentioned Field Definition, expression has risk of interferences and does not have risk of interferences respectively.Perhaps, also can define new field whether to have the indication information of risk of interferences as equipment for indicating user.This new field only needs 1 bit to get final product.
Optionally, before step 530, serving BS 51 sends accidental access response (message 2) in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station.Like this, can avoid the downstream signal of adjacent xenogenesis base station for the interference of the accidental access response of serving BS as far as possible, improve the successful receiving rate of accidental access response.
Particularly, before step 530, can also comprise step 507 (not shown) of being carried out by subscriber equipment 52: determine whether to have risk of interferences based on the signal reception situation from serving BS 51 and adjacent xenogenesis base station.
For example, subscriber equipment 52 can judge whether to have risk of interferences according to Reference Signal Received Power (RSRP), when from serving BS 51 with from poor (or ratio) of the Reference Signal Received Power of adjacent xenogenesis base station less than a predetermined threshold, then be judged to be and have risk of interferences, otherwise then do not have risk of interferences.Again for example, subscriber equipment 52 can judge whether to have risk of interferences according to Reference Signal Received Quality (RSRQ), when from serving BS 51 with from poor (or ratio) of the Reference Signal Received Quality of adjacent xenogenesis base station less than a predetermined threshold, then be judged to be and have risk of interferences, otherwise then do not have risk of interferences.
Above-mentioned method both can be applied to scene shown in Figure 2, also can be applied to scene shown in Figure 3.When being applied to scene shown in Figure 2, subscriber equipment 52 is corresponding to subscriber equipment 22, and serving BS 51 is corresponding to macro base station 21, and adjacent xenogenesis base station is corresponding to femto base station 23.When being applied to scene shown in Figure 3, subscriber equipment 52 is corresponding to subscriber equipment 32, and serving BS 51 is corresponding to pico base station 33, and adjacent xenogenesis base station is corresponding to macro base station 31.
Fig. 6 shows the flow chart of the method that is used for the random access of a subscriber equipment in the base station in the isomery mobile communications network according to an embodiment of the invention.Fig. 7 shows the flow chart that is used for accordingly the method for random access with method shown in Fig. 6 in subscriber equipment.Method shown in Figure 6 comprises step 610,620,630.Method shown in Figure 7 comprises step 710,720,730.Fig. 6, method shown in Figure 7 are used for the random access procedure between serving BS and the subscriber equipment jointly, and the downstream signal that subscriber equipment receives may be subject to the strong interference of adjacent xenogenesis base station (with serving BS xenogenesis base station each other) and have risk of interferences.
In step 610, base station broadcast is with indication risk of interferences subscriber equipment and ascending resource corresponding to non-risk of interferences subscriber equipment difference.
In step 620, the base station determines according to the employed resource of random access guiding that receives whether this subscriber equipment has risk of interferences, if described subscriber equipment has risk of interferences, then send accidental access response (message 2) in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station.
In step 630, if described subscriber equipment has risk of interferences, then the base station sends conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solves (message 4).
In step 710, subscriber equipment receives from the broadcasting of serving BS distinguishes corresponding ascending resource to know risk of interferences subscriber equipment and non-risk of interferences subscriber equipment.
In step 720, subscriber equipment determines whether to have risk of interferences based on the signal reception situation from described serving BS and adjacent xenogenesis base station.
In step 730, whether the subscriber equipment basis has risk of interferences is used respective resources to send random access guiding (message 1).
Above-mentioned steps 610,620,630 corresponds respectively to the step 405,420,440 among the embodiment described in conjunction with Figure 4.Above-mentioned steps 720,730 corresponds respectively to the step 407,410 among the embodiment described in conjunction with Figure 4.
About serving BS for the dividing mode of the uplink random access resources of risk of interferences subscriber equipment and non-risk of interferences subscriber equipment and subscriber equipment for the judgment mode that whether has risk of interferences, all can adopt with front embodiment described in conjunction with Figure 4 in same or analogous mode, do not repeat them here.
Above-mentioned method both can be applied to scene shown in Figure 2, also can be applied to scene shown in Figure 3.When being applied to scene shown in Figure 2, subscriber equipment is corresponding to subscriber equipment 22, and serving BS is corresponding to macro base station 21, and adjacent xenogenesis base station is corresponding to femto base station 23.When being applied to scene shown in Figure 3, subscriber equipment is corresponding to subscriber equipment 32, and serving BS is corresponding to pico base station 33, and adjacent xenogenesis base station is corresponding to macro base station 31.
Fig. 8 shows the flow chart of the method that is used for the random access of a subscriber equipment in the base station in the isomery mobile communications network according to an embodiment of the invention.That Fig. 9 shows is corresponding with method shown in Fig. 8, be used for the method for random access in subscriber equipment flow chart.Method shown in Figure 8 comprises step 810,820.Method shown in Figure 9 comprises step 910,920.Fig. 8, method shown in Figure 9 are used for the random access procedure between serving BS and the subscriber equipment jointly, and the downstream signal that subscriber equipment receives may be subject to the strong interference of adjacent xenogenesis base station (with serving BS xenogenesis base station each other) and have risk of interferences.
In step 810, the base station receives the scheduled transmission from subscriber equipment, the indication information that whether has risk of interferences comprising described subscriber equipment.
In step 820, the base station sends conflict according to described indication information and solves (message 4), if described indication information indicates described subscriber equipment to have risk of interferences, then send conflict in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station and solve.
In step 910, subscriber equipment determines whether to have risk of interferences based on the signal reception situation from serving BS and adjacent xenogenesis base station.
In step 920, subscriber equipment sends scheduled transmission, the indication information that whether has risk of interferences comprising described subscriber equipment to described serving BS.
Above-mentioned steps 820 is corresponding to the step 540 among the embodiment described in conjunction with Figure 5.Above-mentioned steps 910,920 corresponds respectively to the step 507,530 among the embodiment described in conjunction with Figure 5.
In scheduled transmission, carry the mode of the indication information that whether has risk of interferences and subscriber equipment for the judgment mode that whether has risk of interferences about subscriber equipment, all can adopt with front embodiment described in conjunction with Figure 5 in same or analogous mode, do not repeat them here.
Above-mentioned method both can be applied to scene shown in Figure 2, also can be applied to scene shown in Figure 3.When being applied to scene shown in Figure 2, subscriber equipment is corresponding to subscriber equipment 22, and serving BS is corresponding to macro base station 21, and adjacent xenogenesis base station is corresponding to femto base station 23.When being applied to scene shown in Figure 3, subscriber equipment is corresponding to subscriber equipment 32, and serving BS is corresponding to pico base station 33, and adjacent xenogenesis base station is corresponding to macro base station 31.
Those skilled in the art will be understood that above-described embodiment all is exemplary and nonrestrictive.The different technologies feature that occurs in different embodiment can make up, to obtain beneficial effect.Those skilled in the art will be understood that and realize the embodiment of other variations of the embodiment that discloses on the basis of research accompanying drawing, specification and claims.In claims, term " comprises " does not get rid of other devices or step; Indefinite article " one " is not got rid of a plurality of; Term " first ", " second " are used for indicating title but not are used for representing any specific order.Any Reference numeral in the claim all should not be understood to the restriction to protection range.Some technical characterictic appears in the different dependent claims and does not mean that and these technical characterictics can not be made up to obtain beneficial effect.
Claims (14)
1. accidental access method in the isomery mobile communications network that comprises a subscriber equipment, its serving BS and adjacent xenogenesis base station comprises:
I. whether described subscriber equipment basis has risk of interferences use respective resources transmission random access guiding;
Ii. described serving BS determines according to the employed resource of random access guiding that receives whether described subscriber equipment has risk of interferences, if described subscriber equipment has risk of interferences, then send accidental access response in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station;
Iii. described subscriber equipment sends scheduled transmission;
If iv. described subscriber equipment has risk of interferences, described serving BS sends conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solves.
2. accidental access method according to claim 1 is characterized in that, also comprises before described step I:
Described serving BS broadcasts to indicate the respectively ascending resource of correspondence of risk of interferences subscriber equipment and non-risk of interferences subscriber equipment.
3. accidental access method according to claim 1 is characterized in that, also comprises before described step I:
Described subscriber equipment determines whether to have risk of interferences based on the signal reception situation from described serving BS and adjacent xenogenesis base station.
4. accidental access method according to claim 1 is characterized in that, described serving BS is macro base station, and described adjacent xenogenesis base station is femto base station or pico base station.
5. accidental access method according to claim 1 is characterized in that, described serving BS is femto base station or pico base station, and described adjacent xenogenesis base station is macro base station.
6. accidental access method in the isomery mobile communications network that comprises a subscriber equipment, its serving BS and adjacent xenogenesis base station comprises:
III. described subscriber equipment sends scheduled transmission, the indication information that whether has risk of interferences comprising described subscriber equipment to described serving BS behind the accidental access response that receives from described serving BS;
IV. described serving BS sends the conflict solution according to described indication information, if described indication information indicates described subscriber equipment to have risk of interferences, then described serving BS sends conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solves.
7. accidental access method according to claim 6 is characterized in that, also comprises before described Step II I:
II. described serving BS sends accidental access response in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station.
8. accidental access method according to claim 6 is characterized in that, also comprises before described Step II I:
Described subscriber equipment determines whether to have risk of interferences based on the signal reception situation from described serving BS and adjacent xenogenesis base station.
9. accidental access method according to claim 6 is characterized in that, described serving BS is macro base station, and described adjacent xenogenesis base station is femto base station or pico base station.
10. accidental access method according to claim 6 is characterized in that, described serving BS is femto base station or pico base station, and described adjacent xenogenesis base station is macro base station.
11. be used for the random method that accesses of a subscriber equipment in the base station in the isomery mobile communications network, comprise:
Broadcasting is with indication risk of interferences subscriber equipment and ascending resource corresponding to non-risk of interferences subscriber equipment difference;
Determine according to the employed resource of the random access guiding that receives whether described subscriber equipment has risk of interferences, if described subscriber equipment has risk of interferences, then send accidental access response in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station;
If described subscriber equipment has risk of interferences, then send conflict in the subframe corresponding to the descending approximate empty subframe of described adjacent xenogenesis base station and solve.
12. be used for the random method that accesses in the subscriber equipment in the isomery mobile communications network, comprise:
Reception is distinguished corresponding ascending resource from the broadcasting of serving BS to know risk of interferences subscriber equipment and non-risk of interferences subscriber equipment;
Determine whether to have risk of interferences based on the signal reception situation from described serving BS and adjacent xenogenesis base station;
Use respective resources to send random access guiding according to whether having risk of interferences.
13. be used for the random method that accesses of a subscriber equipment in the base station in the isomery mobile communications network, comprise:
Whether reception has the indication information of risk of interferences from the scheduled transmission of described subscriber equipment comprising described subscriber equipment;
Send conflict according to described indication information and solve, if described indication information indicates described subscriber equipment to have risk of interferences, then send conflict in the subframe corresponding to the descending approximate empty subframe of adjacent xenogenesis base station and solve.
14. be used for the random method that accesses in the subscriber equipment in the isomery mobile communications network, comprise:
Determine whether to have risk of interferences based on the signal reception situation from serving BS and adjacent xenogenesis base station;
Send scheduled transmission, the indication information that whether has risk of interferences comprising described subscriber equipment to described serving BS.
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Cited By (2)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102958187B (en) | 2016-05-18 |
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