CN100479595C - Soft switchover resource allocating method and system - Google Patents
Soft switchover resource allocating method and system Download PDFInfo
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- CN100479595C CN100479595C CNB2006100871012A CN200610087101A CN100479595C CN 100479595 C CN100479595 C CN 100479595C CN B2006100871012 A CNB2006100871012 A CN B2006100871012A CN 200610087101 A CN200610087101 A CN 200610087101A CN 100479595 C CN100479595 C CN 100479595C
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Abstract
A method for indication-distributing soft switchover resource includes sending indication-distributing message of soft switchover resource to access end by one or multiple specific sector centralized with service sector, carrying all channel resource distribution information centralized by service sector in said message and carrying out data transmission by access end according to channel resource distribution information in soft switchover resource indication-distributing message in response to soft switchover indication-distributing message. The system used for realizing said method is also disclosed.
Description
Technical field
The present invention relates to the communications field, and more particularly, relate to a kind of soft switchover resource allocating method and system, it goes for such as the radio communication packet switching system.
Background technology
Mobile communication system is one of focus of present Research on Communication Technology.Along with the evolution and the development of mobile communication technology, broadband and IP packet switch is main development trend.In the research of present 3G (3G (Third Generation) Moblie), 3.5G and 4G, higher throughput and the spectrum efficiency of Geng Gao have become one of research emphasis.
Realize that higher throughput and the spectrum efficiency of Geng Gao have number of ways, comprise the introducing and the realization of various diversity techniques, wherein a kind of approach is exactly more effectively to improve the effective bandwidth that is used for transfer of data in the communication bandwidth.In mobile communication system, carry various control signalings by control channel usually, carry effective business data transmission by data channel.So, how to design a communication system efficiently, under the prerequisite of the normal effectively running of assurance system, reduce the expense of control channel as far as possible, thereby improving the occupation proportion of Traffic Channel, improve the throughput of whole system, is an important research project all the time.
OFDMA (based on the access scheme of orthogonal frequency division multiplexi) system utilizes OFDM (OFDM) technology as multiplex technique, promptly by distributing different data subcarriers to distinguish the multiplexing transmission technology of different user to different user.Because the transfer of data between the user is used different mutually orthogonal subcarriers, so the transfer of data between the user can the phase mutual interference in the same sub-district.And when subcarrier is distributed, can make full use of this user's wireless environment situation, make full use of frequency selectivity, the data subcarrier to the user distributes the most suitable transmission makes the capacity of whole system be further enhanced.
In OFDM or OFDMA system, because interference is eliminated substantially in the sub-district, so presence of intercell interference just becomes main interference.In order to solve the problem that service quality reduces, throughput descends that Cell Edge User causes owing to the interference that may be subjected to, improving these quality of services for users by soft handover or similar means is common methods, such as between the different sectors of a base station, implementing More Soft Handoff, between different base station, implement common soft handover or pass through each AT (Access Terminal, incoming end) Active Set of maintenance and several soft-handoff groups (SHOG) are implemented soft handover.
In the mobile communication system of the packet switch that present commercial and industry is being studied, because each user has sudden, distributed characteristics in descending or up request of data, so at each user's resource allocation is that request uplink and downlink according to the user carry out respectively, especially for the system that adopts OFDM or OFDMA technology.
Specifically, in the design of control channel, need send to the user as downlink data, during for user's allocation of downlink channel resource, system notifies the user by sending the down channel assignment message, and the user then takies reception and the processing that corresponding resource is carried out downlink data according to this message; Need to send when the user has upstream data, when distributing uplink channel resources for the user, system notifies the user by sending the up channel assignment message, and the user then takies preparation and the transmission that corresponding resource is carried out upstream data according to this message; Fig. 1 shows a kind of typical assignment message design, comprises the design of descending assignment message and up assignment message.
Under the situation of implementing descending soft hand-off, being in Active Set need need send identical data with frequency resource to current AT in the identical time for current AT provides each base station of service, and AT carries out the data merging and obtains corresponding soft handover gain; Under the situation of capable soft hand-off, AT sends data in the time and the frequency resource of assignment on the implementation, need obtain soft handover gain for current AT provides each base station of service to receive these data and merges accordingly to handle thereby be in Active Set.Therefore, no matter be descending or up soft handover, for providing each base station of service, the user all need the forward control channel by separately to send descending or up assignment message to current AT respectively, tell the concrete condition of current AT assigned resources.
In technical scheme according to correlation technique, because under the situation of soft handover, be more than one of active user's serving base station number simultaneously, therefore for the active user carries out once descending or up resource allocation, the assignment message of needs and serving BS similar number just can be finished purpose.The time that is in soft handover along with the user constantly increases or the user that is in soft changing state constantly increases, the expense that whole system is used for resource allocation will constantly increase, simultaneously, assignment efficient but reduces (is the behavior of user's assigned resources because need many assignment messages just can finish) accordingly, also just cause the high of control channel load, thereby influenced the further raising of the throughput and the performance of whole system.
Therefore, need a kind of soft switchover resource allocating method and system, it can reduce the expense of system's control channel, reduces the interference that assignment message brings, and the system that makes can efficiently satisfy soft handover user's assignment needs, improves the throughput of whole system.
Summary of the invention
Consider the problems referred to above and make the present invention.The invention provides a kind of soft switchover resource allocating method and system, the expense that it can reduce system's control channel reduces the interference that assignment message brings, thereby improves the throughput of whole system, and it goes for such as the radio communication packet switching system.
According to an aspect of the present invention, provide a kind of soft switchover resource allocating method.
Resource allocation method according to the present invention may further comprise the steps: one or more particular sector that serving sector is concentrated send soft switchover resource allocating message to incoming end, wherein, carry all signal channel resource allocation informations that serving sector is concentrated in the soft switchover resource allocating message; And in response to soft switchover resource allocating message, incoming end carries out transfer of data according to the signal channel resource allocation information in the soft switchover resource allocating message.
Usually, the particular sector of transmission soft switchover resource allocating message is the strongest sector of pilot frequency intensity or the best sector of wireless environment.
Especially, in above-mentioned soft switchover resource allocating message, carry indication information, be used to indicate the set of serving sector, that is, be used for indicating the sector of this assigned service sets of sectors.In addition, can represent the sector in the sets of sectors in several ways, for example, indication information can be sector ID, the sector is carried out uniquely identified sector PN, in Active Set uniquely identified Active Set index or bitmap field (wherein, each sector is corresponding to a bit) carried out in the sector.
Below will specifically describe the situation that above-mentioned indication information is a bitmap field.At above-mentioned indication information is under the situation of bitmap field, and each sector takies a bit, and for example, bit is that does not concentrate at serving sector the current sector of 0 expression, and on the contrary, bit is that concentrate at serving sector the current sector of 1 expression.In addition, the order of bitmap can come unique identification by the index of Active Set or the multiple modes such as sequence number arrangement of serving sector.Especially, be included in serving sector and concentrate, so preferably do not comprise sign in the bitmap field, to save resource the sector that sends message owing to implied the sector that sends soft switchover resource allocating message in the indication information.
In addition, the incoming end transfer of data of carrying out according to the channel resource allocation message in the soft switchover resource allocating message can be downlink data receiving or send upstream data.And in this step, incoming end can carry out the soft handover transfer of data of all directions, includes but not limited to descending and up.
In above-mentioned soft switchover resource allocating method, under the situation of incoming end downlink data receiving or transmission upstream data, the indication information that carries in the soft switchover resource allocating message differs from one another.This be because, descending is that the base station sends data to incoming end, thus incoming end need know which base station is current and send data to oneself, gain thereby make full use of the merging that soft handover brings; And up be that incoming end sends data to the base station, so incoming end does not need to know the data of which base station reception oneself transmission in some cases, only needing base station and network side self to know gets final product, therefore, in this case, the resource allocating message of representing reverse soft handover can not carried the bitmap field of representing the serving sector collection.
According to a further aspect in the invention, provide a kind of resource allocation system.
Resource allocation system according to the present invention comprises: message transmission module, be used to send soft switchover resource allocating message, and wherein, carry all signal channel resource allocation informations that serving sector is concentrated in the soft switchover resource allocating message; And data transmission module, in response to soft switchover resource allocating message, carry out transfer of data according to the signal channel resource allocation information in the soft switchover resource allocating message.
It should be noted that in above-mentioned soft switchover resource allocating message to carry indication information, be used to indicate the set of serving sector, that is, be used for indicating the sector of this assigned service sets of sectors.In addition, can represent the sector in the sets of sectors in several ways, for example, indication information can be sector ID, the sector is carried out uniquely identified sector PN, in Active Set uniquely identified Active Set index or bitmap field (wherein, each sector is corresponding to a bit) carried out in the sector.
At above-mentioned indication information is under the situation of bitmap field, and each sector takies a bit, and for example, bit is that does not concentrate at serving sector the current sector of 0 expression, and on the contrary, bit is that concentrate at serving sector the current sector of 1 expression.In addition, the order of bitmap can come unique identification by the index of Active Set or the multiple modes such as sequence number arrangement of serving sector.Especially, be included in serving sector and concentrate, so preferably do not comprise sign in the bitmap field, to save resource the sector that sends message owing to implied the sector that sends soft switchover resource allocating message in the indication information.
Especially, the data transmission module transfer of data of carrying out according to the signal channel resource allocation information in the soft switchover resource allocating message can be downlink data receiving or send upstream data.In addition, data transmission module can carry out the soft handover transfer of data of all directions, includes but not limited to descending and up.
Under the situation of data transmission module downlink data receiving or transmission upstream data, the indication information that carries in the soft switchover resource allocating message differs from one another, particularly, send at data transmission module under the situation of upstream data, can not comprise bitmap field in the soft switchover resource allocating message.
By above technical scheme, the present invention has realized following beneficial effect: the expense that has reduced system's control channel, reduced the interference that assignment message brings, the system that makes can efficiently satisfy soft handover user's assignment needs, thereby improves the throughput of whole system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the chart that illustrates according to the exemplary soft switchover resource allocating message design of correlation technique;
Fig. 2 is the schematic diagram that illustrates according to exemplary descending soft switchover resource allocating message design of the present invention;
Fig. 3 shows the schematic diagram of place according to exemplary up soft switchover resource allocating message design of the present invention;
Fig. 4 is the flow chart that illustrates according to the soft switchover resource allocating method of first embodiment of the invention; And
Fig. 5 is the block diagram that illustrates according to the soft switchover resource allocating system of second embodiment of the invention.
Embodiment
Hereinafter with reference to accompanying drawing the preferred embodiments of the present invention are described.
At first with reference to Fig. 2 to Fig. 4, wherein, Fig. 2 and Fig. 3 are respectively the schematic diagrames that descending soft switchover resource allocating message and the design of up soft switchover resource allocating message are shown, and Fig. 4 is the flow chart that illustrates according to the resource allocation method of first embodiment of the invention.
As shown in Figure 4, in step S402, the particular sector (sector that sector that pilot frequency intensity is the strongest or wireless environment are best) that serving sector is concentrated sends soft switchover resource allocating message to incoming end, wherein, carry all signal channel resource allocation informations that serving sector is concentrated in the soft switchover resource allocating message, and comprise indication information;
Wherein, the sector that sends soft switchover resource allocating message must can also not send this soft switchover resource allocating message by one or more sectors for the particular sector of the best sector of the strongest sector of above-mentioned pilot frequency intensity or wireless environment;
Especially, the indication information that carries in above-mentioned soft switchover resource allocating message is used to indicate the set of serving sector,, is used for indicating the sector of this assigned service sets of sectors that is.In addition, can represent the sector in the sets of sectors in several ways, for example, indication information can be sector ID, the sector is carried out uniquely identified sector PN, in Active Set uniquely identified Active Set index or bitmap field (wherein, each sector is corresponding to a bit) carried out in the sector;
At above-mentioned indication information is under the situation of bitmap field, and each sector takies a bit, and for example, bit is that does not concentrate at serving sector the current sector of 0 expression, and on the contrary, bit is that concentrate at serving sector the current sector of 1 expression.In addition, the order of bitmap can come unique identification by the index of Active Set or the multiple modes such as sequence number arrangement of serving sector.Especially, be included in serving sector and concentrate, so preferably do not comprise sign in the bitmap field, to save resource the sector that sends message owing to implied the sector that sends soft switchover resource allocating message in the indication information.Generally speaking, the maximum number of Active Set is 6, and maximum service set of sectors number commonly used in the real system is 3, so bitmap field only needs 3 bits just much of that.
Next, in step S404, in response to soft switchover resource allocating message, incoming end carries out transfer of data according to the signal channel resource allocation information in the soft switchover resource allocating message;
Especially, the transfer of data that incoming end carries out in step S404 can be downlink data receiving or send upstream data that in addition, incoming end can carry out the soft handover transfer of data of all directions, includes but not limited to descending and up;
At incoming end downlink data receiving or send under the situation of upstream data in step S404, the indication information that carries in the soft switchover resource allocating message differs from one another.This be because, descending is that the base station sends data to incoming end, thus incoming end need know which base station is current and send data to oneself, gain thereby make full use of the merging that soft handover brings; And up be that incoming end sends data to the base station, so incoming end does not need to know the data of which base station reception oneself transmission in some cases, only needing base station and network side self to know gets final product, therefore, in this case, the resource allocating message of representing reverse soft handover can not carried the bitmap field of representing the serving sector collection.
Second embodiment
Describe according to a second embodiment of the present invention hereinafter with reference to Fig. 5, wherein, Fig. 5 is the block diagram that illustrates according to the soft switchover resource allocating system of second embodiment of the invention.
As shown in Figure 5, comprise message transmission module 502 and data transmission module 504 according to soft switchover resource allocating of the present invention system 500.Wherein, message transmission module 502 is used to send soft switchover resource allocating message, wherein, carries all signal channel resource allocation informations that serving sector is concentrated in the soft switchover resource allocating message; In response to soft switchover resource allocating message, data transmission module 504 carries out transfer of data according to the signal channel resource allocation information in the soft switchover resource allocating message.
The transfer of data that data transmission module 504 carries out can be downlink data receiving or send upstream data, and especially, data transmission module 504 can carry out the soft handover transfer of data of all directions, includes but not limited to descending and up.
Similar with first embodiment, wherein, in above-mentioned soft switchover resource allocating message, carry all signal channel resource allocation informations that serving sector is concentrated, and comprise indication information.Wherein, indication information is used to indicate the set of serving sector,, is used for indicating the sector of this assigned service sets of sectors that is.In addition, can represent the sector in the sets of sectors in several ways, for example, indication information can be sector ID, the sector is carried out uniquely identified sector PN, in Active Set uniquely identified Active Set index or bitmap field (wherein, each sector is corresponding to a bit) carried out in the sector.
At above-mentioned indication information is under the situation of bitmap field, and each sector takies a bit, and for example, bit is that does not concentrate at serving sector the current sector of 0 expression, and on the contrary, bit is that concentrate at serving sector the current sector of 1 expression.In addition, the order of bitmap can come unique identification by the index of Active Set or the multiple modes such as sequence number arrangement of serving sector.Especially, be included in serving sector and concentrate, so preferably do not comprise sign in the bitmap field, to save resource the sector that sends message owing to implied the sector that sends soft switchover resource allocating message in the indication information.
In addition, under the situation of data transmission module 504 downlink data receivings or transmission upstream data, the indication information that carries in the soft switchover resource allocating message differs from one another, particularly, send at data transmission module under the situation of upstream data, can not comprise bitmap field in the soft switchover resource allocating message.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a soft switchover resource allocating method is characterized in that, may further comprise the steps:
One or more particular sector in the serving sector set send soft switchover resource allocating message to incoming end, wherein, carry all signal channel resource allocation informations in the set of described serving sector in the described soft switchover resource allocating message and be used for indicating the indication information of the sector of described serving sector set, wherein, described particular sector is the strongest sector of pilot frequency intensity or the best sector of wireless environment; And
In response to described soft switchover resource allocating message, described incoming end carries out transfer of data according to the described signal channel resource allocation information in the described soft switchover resource allocating message.
2. soft switchover resource allocating method according to claim 1 is characterized in that described indication information is a sector ID.
3. soft switchover resource allocating method according to claim 1 is characterized in that, described indication information is that uniquely identified sector PN is carried out in the sector.
4. soft switchover resource allocating method according to claim 1 is characterized in that, described indication information is the Active Set index that the sector is carried out only sign in Active Set.
5. soft switchover resource allocating method according to claim 1 is characterized in that described indication information is a bitmap field, and each sector is corresponding to a bit.
6. the soft switchover resource allocating method of stating according to claim 5, it is characterized in that, be 1 o'clock in described bitmap field, represents that its pairing sector is in described serving sector set, when described bitmap field is 0, represent that its pairing sector is not in described serving sector set.
7. soft switchover resource allocating method according to claim 5 is characterized in that, described bitmap field does not comprise the sign corresponding to the particular sector that sends described soft switchover resource allocating message.
8. soft switchover resource allocating method according to claim 1, it is characterized in that described incoming end carries out transfer of data according to the described signal channel resource allocation information in the described soft switchover resource allocating message and comprises: described incoming end comes downlink data receiving or sends upstream data according to the described signal channel resource allocation information in the described soft switchover resource allocating message.
9. according to claim 5 or 8 described soft switchover resource allocating methods, it is characterized in that, is to send under the situation of upstream data in the described transfer of data that described incoming end carries out, and does not comprise described bitmap field in the described soft switchover resource allocating message.
10. a soft switchover resource allocating system is characterized in that, comprising:
Message transmission module is used to send soft switchover resource allocating message, wherein, and the indication information that carries all signal channel resource allocation informations in the serving sector set in the described soft switchover resource allocating message and be used for indicating the sector of described serving sector set; And
Data transmission module in response to described soft switchover resource allocating message, carries out transfer of data according to the described signal channel resource allocation information in the described soft switchover resource allocating message.
11. soft switchover resource allocating according to claim 10 system is characterized in that described indication information is a sector ID.
12. soft switchover resource allocating according to claim 10 system is characterized in that,
Described indication information is that uniquely identified sector PN is carried out in the sector.
13. soft switchover resource allocating according to claim 10 system is characterized in that described indication information is the Active Set index that the sector is carried out only sign in Active Set.
14. soft switchover resource allocating according to claim 10 system it is characterized in that described indication information is a bitmap field, and each sector is corresponding to a bit.
15. soft switchover resource allocating according to claim 14 system, it is characterized in that, be 1 o'clock in described bitmap field, represents that its pairing sector is in described sets of sectors, when described bitmap field is 0, represent that its pairing sector is not in described sets of sectors.
16. soft switchover resource allocating according to claim 10 system is characterized in that, described data transmission module comes downlink data receiving or sends upstream data according to the described signal channel resource allocation information in the described soft switchover resource allocating message.
17., it is characterized in that according to claim 14 or 16 described soft switchover resource allocating systems, send at described data transmission module under the situation of upstream data, do not comprise described bitmap field in the described soft switchover resource allocating message.
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| EP3133866B1 (en) * | 2014-05-08 | 2018-08-08 | Huawei Technologies Co. Ltd. | Apparatus and method for controlling soft switch proportion |
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