CN101227747A - Demodulation resource allocation method, base station and system - Google Patents

Abstract

Embodiments of the present invention provide a demodulation resource allocation method, base station, and system. The method includes: establishing a data channel and a control channel for the serving radio link RL and a non-serving RL, and allocating the data channel and the control channel for the serving RL Demodulation resources, and allocate control channel demodulation resources for non-serving RL; allocate demodulation resources between serving RL and non-serving RL, and the priority of non-serving RL to allocate demodulation resources is lower than that of serving RL to allocate demodulation resources priority. The technical solution provided by the embodiment of the present invention, on the premise of ensuring the interference control of adjacent cells, allocates demodulation resources according to certain rules, which can improve the utilization rate of uplink demodulation resources, improve system throughput, and optimize system performance.

Description

Demodulation resource allocation method, base station and system

technical field

The invention relates to the technical field of network communication, in particular to a demodulation resource allocation method, base station and system.

Background technique

UMTS is a third-generation mobile communication system using WCDMA air interface technology, and the UMTS system is usually called a WCDMA communication system. In the UMTS system, the coverage areas of adjacent cells will overlap, and soft handover can be used to provide seamless handover, and the gain achieved by MDC (MacroDiversity Combining) can increase the anti-interference ability of the system.

With the development of mobile communication technology, 3G technology is also constantly evolving. In the 3GPP Release 6 (Release 6, referred to as "R6") version, High Speed Uplink Packet Access (High Speed Uplink Packet Access, referred to as "HSUPA") was introduced. HSUPA also supports uplink macro-diversity technology.

In order to improve the life cycle of WCDMA and the investment protection of operators, 3GPP proposed a research plan for the evolution of E-HSPA, hoping to improve spectrum efficiency on the basis of the existing R6 version, reduce control plane and user plane delay, and be backward compatible And forward smooth evolution to LTE/SAE (Long Term Evolution Plan/System Architecture Evolution) system, including the improvement of air interface performance and the evolution of RAN architecture. In the E-HSPA (Evolved High Speed Packet Access, evolved high-speed packet access) network, the RNC function is moved down to NodeB+ (E-HSPA NodeB, E-HSPA base station). NodeB+ is directly connected to the core network through the IuPS interface.

In the above communication systems, there is a problem of resource allocation. Especially after the introduction of HSPA high-speed services, the need to improve resource utilization is more urgent.

CE (Channel Element, channel unit) is a resource of the base station, which can be regarded as the demodulation/despreading/decoding and coding/spreading/modulation part. CE is related to the service type. For example, AMR (Adaptive Multi-rate, adaptive multi-rate) 12.2k voice requires 1 CE, PS (packet switched, packet switching) 64 requires 4 uplinks, and 2 downlinks. In the prior art, the CE allocation mode is: static allocation (or fixed allocation).

In the process of realizing the present invention, the inventor has found that the above-mentioned prior art has at least the following problems:

Regardless of the WCDMA system or E-HSPA that introduces HSUPA, for the non-serving cell base station, it is necessary to allocate demodulation resources for all service data during the MDC process. However, in actual application scenarios, for services with certain service characteristics (such as high-speed non-real-time services), the gain of using MDC is not obvious. In this way, it is equivalent to using a relatively large demodulation resource cost in exchange for a relatively small gain, which is not worth the gain in terms of the system as a whole.

In addition, the method of static allocation of CE makes the utilization efficiency of CE resources low, thus making the throughput rate of the system low.

Contents of the invention

Embodiments of the present invention provide a demodulation resource allocation method, base station, and system. On the premise of ensuring adjacent cell interference control, demodulation resource allocation is performed according to certain rules, which can improve the utilization rate of uplink demodulation resources and improve The throughput rate of the system optimizes the system performance.

Specifically, an embodiment of the present invention provides a demodulation resource allocation method, the method includes: establishing a data channel and a control channel for the serving radio link RL and a non-serving RL, and establishing a data channel and a control channel for the serving RL Allocate demodulation resources, and allocate control channel demodulation resources for non-serving RL; allocate demodulation resources between serving RL and non-serving RL, and the priority of non-serving RL to allocate demodulation resources is lower than that of serving RL to allocate demodulation The priority of the resource.

Another embodiment of the present invention provides a base station, including: an establishment unit, used to establish a data channel and a control channel for a serving radio link RL and a non-serving RL; a first resource allocation unit, used for serving RL data Allocating demodulation resources for the channel and the control channel, and allocating control channel demodulation resources for the non-serving RL; the second resource allocation unit is used to allocate demodulation resources between the serving RL and the non-serving RL, and the non-serving RL allocates demodulation resources The priority of the demodulation resource is lower than the priority of the demodulation resource allocated by the serving RL.

Yet another embodiment of the present invention provides a demodulation resource allocation system, including the base station provided in the base station embodiment, and users, where the users include non-serving radio link RL users and serving RL users.

It can be seen from the description of the above technical solution that in the technical solution provided by the embodiment of the present invention, when the wireless link RL is established, both the non-serving RL data channel and the control channel are established, and the allocation of demodulation resources for the control channel ensures the interference control of adjacent cells. On this basis, on the principle that the priority of non-serving RL is lower than that of serving RL, demodulation resources are allocated between serving RL and non-serving RL. In this way, the utilization rate of uplink demodulation resources can be improved, the throughput rate of the system can be improved, and the system performance can be optimized.

Description of drawings

FIG. 1 is a schematic diagram of a demodulation resource allocation method provided by a first embodiment of the present invention;

FIG. 2 is a schematic diagram of a demodulation resource allocation method provided by a second embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a base station provided by a third embodiment of the present invention.

Detailed ways

The method for implementing macro-diversity combining in the embodiments of the present invention will be described below in conjunction with the accompanying drawings and examples. It can be understood that the embodiments of the present invention are only examples and are not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims Book OK.

The embodiments of the present invention are mainly described by taking WCDMA and E-HSPA systems as examples, but it can be understood that the technical solutions provided by the embodiments of the present invention are also applicable to systems such as LTE/SAE. The names of network elements are different in different systems. For example, in WCDMA, the radio network controller is RNC, and the base station is NodeB. In E-HSPA, the base station is an enhanced base station NodeB+, and in an LTE system, it is an evolved base station E-NodeB. When it comes to macro-diversity combined MDC, the network nodes that execute MDC are different network elements in different systems, such as RNC in the WCDMA system, and serving cell base stations in the E-HSPA system (enhanced base station NodeB+, with SRNC function), in the LTE system it is a base station of a serving cell (evolved base station E-NodeB).

It is understandable that HSUPA uses HARQ (hybrid automatic retransmission request, hybrid automatic retransmission request) retransmission, and HARQ retransmission leads to the consumption of more CEs in order to obtain the same MAC layer rate compared with R99. Therefore, the CE resource consumption of the base station increases significantly with the introduction of HSUPA. At the same time, the soft handover technology is also applied in HSUPA, and the UE establishes radio links with multiple cells, which consumes more CE resources. To sum up, the uplink CE resource of the base station will become a bottleneck affecting the number of users and throughput.

For the HSUPA users of a base station, according to its RL (radio link, wireless link) attribute, it can be divided into two types, one is the user serving the RL, and the other is the user not serving the RL.

For a user serving the RL, if the CE required by the average or instant rate is equal to or greater than the CE currently allocated to the user, the CE may have become the main factor limiting the user rate at this time. On the one hand, it is necessary to increase the CE allocated to the user; on the other hand, in order to ensure the utilization rate of the CE, as long as the added CE can meet the needs of serving RL users, that is, there is no need to serve too many RL users increase CE.

For the users of the non-serving RL, in order to ensure the requirement of adjacent cell interference control, the base station first needs to reserve the minimum number of CEs required to process the control channel for the non-serving RL. On the premise that this condition is satisfied, the demodulation of the non-serving RL uplink data channel can be dynamically allocated according to the remaining resources of the base station. The main principle of the dynamic allocation is: allocate if there are remaining resources, and temporarily not allocate if there are no remaining resources. If there are remaining resources but the remaining resources are insufficient, the allocation can be based on certain priority rules.

Moreover, according to 3GPP protocol 25.309, for users serving RL, the base station can send a scheduling grant to increase the user's rate, while for non-serving RL users, the base station can only decrease the user's rate. For non-serving RL users, the base station does not know how the user's serving RL cell schedules them, so it does not know the exact rate of the user at the next moment. Therefore, no matter how many CEs are allocated to non-serving RL users, All of them may not be able to meet the actual CE needs of users at the next moment. According to this, the CE resources of serving RL users and non-serving RL users can be differentiated: when the load of the base station is relatively heavy, when users in the serving cell access (that is, the number of serving RL users needs to be increased) or the number of CEs belonging to serving RL users needs to be increased And when there are no redundant demodulation resources at present, it is necessary to preempt demodulation resources of non-serving RL users, so that CEs are fully allocated to serving RL users, and the throughput of the system can be improved.

Accordingly, the embodiment of the present invention may adopt the following technical solution: the priority of demodulation resources allocated by the non-serving RL is lower than the priority of demodulation resources allocated by the serving RL. Specifically, under the premise of ensuring the allocation of demodulation resources for the serving RL, the uplink demodulation resources are dynamically allocated for the non-serving RL (dynamic allocation mechanism), and the demodulation resources of the serving RL user and the non-serving RL user (specifically, can be CE resources) are treated differently (preemption mechanism), thereby optimizing system performance as a whole.

1. The following first describes the dynamic allocation mechanism:

The above dynamic allocation mechanism may be set by the system, such as by the operation and maintenance center OMC. After the system is set up, the predetermined mechanism is pre-configured in each network node (such as the base station in WCDMA, RNC, base station in E-HSPA and LTE/SAE system, etc.), or in one or several network nodes The reservation mechanism is pre-configured in the network, and then the network node that has configured the reservation mechanism notifies other network nodes. Or, configure directly in the base station.

Taking the configuration in the base station as an example for illustration, the basis for judging the dynamic allocation mechanism can be one of the following factors or a combination:

(1) The user's scheduling priority. The user's scheduling priority is a priority based on factors such as user priority and service processing priority. It can be used to distinguish the priority relationship between users. The scheduling priority can have multiple levels, such as 1-15. For the sake of simplicity, the following descriptions concerning the scheduling priority only take VIP users and common users as examples, and assume that the scheduling priority of VIP users is higher than that of common users. It can be understood that when multiple RLs are all non-serving RLs, the scheduling priority may represent the relative priority of allocating demodulation resources among these non-serving RLs.

(2) Macrodiversity characteristics of user services in a specific selective macrodiversity combining mode. The so-called specific selective macro-diversity combining manner may include: the base station decides whether to perform the selective macro-diversity combining, or the selective macro-diversity is realized flexibly by sending an indicator to the base station. Judging the macrodiversity characteristics of user services in a specific selective macrodiversity combining mode is as follows: For example, in the mode of indicating macrodiversity, the characteristic is "whether the service needs uplink macrodiversity", and if a service clearly indicates that it does not Need, even if there are new resources in the future, they will not be allocated to the business that clearly indicates that no allocation is required. For another example, in the selective macro-diversity mode determined by the base station itself, this feature is "uplink macro-diversity demand priority of user services". In this mode, if new demodulation resources are available, they can be redistributed For services that have not been allocated demodulation resources.

It is worth noting that the application of this judgment factor may be a comparison between services on the RL in the case of a non-serving RL, or a comparison between services on multiple non-serving RLs.

(3) The user's service rate is high or low.

Applying this judgment factor, it can be set that when the user’s service rate is relatively high (such as high-speed upload service), the priority of dynamically allocating demodulation resources is relatively low, and when the user’s service rate is relatively low (such as CS voice service) ), the priority of dynamically allocating demodulation resources is relatively high.

The above judgment factors can be used alone. For example, only the user scheduling priority is judged. Moreover, to a certain extent, the user scheduling priority may already contain information on service characteristics. For another example, only judging the macro-diversity characteristics of user services in a specific selective macro-diversity combining mode is relatively simple to implement. Another example is to judge only by judging the service rate of the user.

The above judging factors can also be used in combination, and the judging order can be arranged among the above judging factors. For example, the combination of (1) and (2), and judge (1) first, and then judge (2). Or other combinations and other judgment sequences.

It should be noted that the above-mentioned judging factors are just examples, and it is understandable that other judging factors may also be used. In addition, the rule can also be dynamically adjusted. Taking WCDMA as an example, for example, the indication of whether the service needs uplink macro-diversity can be changed by means of RNC reconfiguration (the original does not require MDC, but instead requires MDC, or vice versa). Change the priority relative relationship of this business. Correspondingly, the base station will increase the priority of the non-serving RL service, which means that the probability of the non-serving RL being allocated demodulation resources increases.

2. The preemption mechanism is described as follows:

The above preemption mechanism may be set by the system, such as by the operation and maintenance center OMC. After the system is set up, the predetermined mechanism is pre-configured in each network node (such as the base station in WCDMA, RNC, base station in E-HSPA and LTE/SAE system, etc.), or in one or several network nodes The reservation mechanism is pre-configured in the network, and then the network node that has configured the reservation mechanism notifies other network nodes. Or, configure directly in the base station.

The principle of the preemption mechanism is: the serving RL user preempts the non-serving RL user, and the preempted priority is distinguished within the non-serving RL.

The basis for judging the preemption mechanism can be one or a combination of the following factors:

(1) The user's scheduling priority. Users with high scheduling priority have a lower probability of being preempted. For example, after the base station establishes a non-serving RL for VIP users, since the scheduling priority of this VIP user is relatively high, when users in the serving cell access and resources are insufficient, demodulation resources for users in other non-serving cells should be preempted first. The scheduling priority may represent the relative priority of the non-serving RLs being preempted by the serving RL.

(2) Macrodiversity characteristics of user services in a specific selective macrodiversity combining mode. Adapting to the dynamic allocation mechanism, the business that is easy to be allocated with demodulation resources has a relatively low probability of being preempted.

(3) The user's service rate is high or low.

The above judging factors can be used alone or in combination, and the rules can also be adjusted dynamically. This has already been discussed above, and will not be repeated here.

Specific examples are given below, and the technical solutions of the embodiments of the present invention are described in detail in conjunction with the accompanying drawings.

Method embodiment one:

This embodiment is described by taking a WCDMA system as an example. In this embodiment, it is assumed that a low-speed CS voice service (referred to as CS service in this embodiment) and a high-speed HSUPA service (referred to as PS service in this embodiment) are established on the RL of the non-serving cell. Moreover, the adopted selective macro-diversity mode is: the uplink selective macro-diversity is determined by the base station itself. In addition, if there is only one service that requires or does not need to allocate demodulation resources, the processing is relatively simple, which will not be described in detail in the embodiment of the present invention. FIG. 1 is a flowchart of a method for implementing macro-diversity combining in this embodiment.

Step 101: Establish a data channel and a control channel for the serving radio link RL, and allocate demodulation resources for the data channel and the control channel of the serving RL;

Step 102: Establish a data channel and a control channel for the non-serving RL, and allocate demodulation resources for demodulating the control channel to the non-serving RL;

As mentioned above, in order to ensure the requirement of adjacent cell interference control in macro-diversity combining, the base station reserves the minimum number of CEs required for processing the control channel for the non-serving RL.

In this step, the base station receives a non-serving RL establishment request initiated by a non-serving RL user. In order to ensure the need for adjacent cell interference control, the base station first needs to allocate demodulation resources for demodulating the control channel to this non-serving RL, namely The non-serving RL user may be assigned the minimum number of CEs required to process its non-serving RL control channel.

Specifically, the control channel used for demodulation may be: an uplink control channel used for uplink load estimation, such as DPCCH (Dedicated Physical Control Channel, dedicated physical control channel) and an uplink physical channel E-DPCCH (Enhanced Physical Control Channel) added by introducing HSUPA. -Dedicated Physical Control, Channel Enhanced Dedicated Physical Control Channel), and the control channel for downlink sending user uplink transmit power adjustment instructions, such as F-DPCH (Forward-Dedicated Physical Channel DPCH, forward dedicated physical channel), and the introduction of HSUPA The downlink physical channel E-RGCH (E-DCH Relative Grant Channel, E-DCH Relative Grant Channel).

The demodulation of the allocated demodulation resources for the above control channel can effectively realize the interference control of adjacent cells.

It should be noted that steps 101 and 102 do not have a strict sequence of steps.

Step 103: When establishing a non-serving RL, judge whether the current remaining demodulation resources of the base station are insufficient, if yes, perform step 104; if the demodulation resources are sufficient, then perform step 105;

In this step, the remaining demodulation resources are: the remaining demodulation resources of the base station after allocating demodulation resources for the data channel and control channel of the serving RL, and allocating demodulation resources for the control channels of the non-serving RL.

Step 104: the base station allocates the remaining demodulation resources to the non-serving RL according to the set dynamic allocation mechanism;

In this step, the basis of the dynamic allocation mechanism is the dynamic allocation priority, and the dynamic allocation priority represents the relative priority of demodulation resource allocation among different non-serving RLs, and/or between different services carried by non-serving RLs. Relative priority for assigning demodulation resources.

As mentioned above, there may be many factors for judging the dynamic allocation mechanism. In this embodiment, judging the macro-diversity characteristics of user services in a specific selective macro-diversity combining mode is taken as an example for illustration. In this embodiment, the selective macro-diversity mode adopted is: the uplink selective macro-diversity is determined by the base station itself. Since the low-speed CS voice service in the UE service is a service with a relatively high macro-diversity requirement priority (the macro-diversity gain is relatively large), demodulation resources are allocated to the CS service and demodulated. Since the demodulation resources are insufficient, and the macro-diversity requirement of the PS service has a lower priority, no demodulation resources are allocated to the PS service.

Step 105: Allocate demodulation resources for non-serving RLs;

In this step, since the demodulation resources are sufficient, all demodulation resources can be allocated to the non-serving RLs.

Step 106: If there are released demodulation resources available, allocate the available demodulation resources to services that have not been allocated demodulation resources before the non-serving RL;

In this embodiment, if there are released demodulation resources, but the PS service of the non-serving RL has not been allocated demodulation resources before, so the released demodulation resources can be allocated to the PS service for demodulation. Tune.

Step 107: If the resource is insufficient, implement the resource preemption of the serving RL to the non-serving RL according to the set preemption mechanism.

In this step, the preemption priority represents the relative priority preempted by the serving RL between different non-serving RLs and/or between different services carried by the non-serving RLs. If the priority is high, it is not easy to be preempted.

During the non-serving RL connection process, if the serving RL needs new demodulation resources and there are no redundant demodulation resources at present, for example, when the user in the serving cell accesses (adding a new serving RL) or the channel unit CE belonging to the serving RL user When additional demodulation resources are needed and there are no redundant demodulation resources, it may cause insufficient resources. As mentioned above, there are many possibilities for the preemption mechanism. In this embodiment, judging the macro-diversity characteristics of user services in a specific selective macro-diversity combining mode is taken as an example for illustration. Assuming that in step 103 a CE is allocated for the PS service that has not been allocated demodulation resources before, then in step 104, since the PS service uplink macro-diversity requirement has a relatively low priority, the new serving RL preempts the CE allocated to the PS service first. Demodulation resources, if the resources still cannot satisfy the service RL, then seize the CS demodulation resources. Certainly, if no demodulation resource is allocated for the PS service in step 103, if preemption occurs, the demodulation resource of the CS service is directly preempted.

In step 107 of this embodiment, preemption may also be performed according to other judgment criteria. For example, consider the user's scheduling priority. If there are multiple non-serving RLs at the same time, for example, one is a non-serving RL corresponding to a VIP user, and the other is a non-serving RL corresponding to an ordinary user, when a user in the serving cell accesses and resources are insufficient, it should be preempted first. The demodulation resource of the non-serving RL corresponding to the common user.

It should be noted that the above steps appear in the form of step 106 and step 107, but in fact, these two steps may be in no particular order. For example, if there are released resources available after the preemption occurs, they will be allocated again according to the dynamic allocation mechanism.

It can be understood that, after demodulation of services (or called service data) allocated with demodulation resources, the base station can forward the part of services to the network node implementing MDC for macro-diversity combining. In this embodiment, the network node executing the MDC is the RNC. This process can be further divided into the following sub-steps: allocating data channel demodulation resources, encapsulating demodulated uplink service data into data frames, and sending the encapsulated data frames to RNC.

In addition, it is worth noting that the above-mentioned allocation of demodulation resources and corresponding operations is performed by the base station, and the base station is a non-serving base station for the non-serving RL (assumed to correspond to UE1), but the base station can also serve as the serving RL (assumed for UE2) serving base station.

Method embodiment two:

In this embodiment, the WCDMA system is still taken as an example for description. In this embodiment, it is assumed that a low-speed low-speed VOIP service and a high-speed upload service are established on the wireless link of the non-serving cell. In addition, the selective macro-diversity method adopted is: the RNC sets an indicator to specify which services require uplink macro-diversity.

The following describes how the RNC specifies uplink macro diversity:

The MDC optimization scheme is defined in R7, that is, the indicator is set based on each MAC-d flow carried on the DCH/E-DCH to flexibly implement the selective UL MDC scheme and whether to establish the transmission bearer of the Iub/Iur interface. Generally speaking, the uplink high-speed non-real-time services can be set to not require MDC (it takes up a lot of transmission resources and the MDC gain is small), and the low-speed real-time services such as SRB and VOIP can be set to require MDC. Or, the services carried by the DCH channel need UL MDC, and other high-speed non-real-time services do not need UL MDC. The SRNC may set the "Transport Bearer Not Requested Indicator" of the corresponding MAC-d flow as follows: A: not carried; B: set to Transport Bearer shall not be Established; C: set to Transport Bearer may not be Established. A is compatible with the traditional method, B indicates that uplink macro-diversity data forwarding is not required, and C indicates that the base station NodeB decides whether to need uplink macro-diversity data forwarding.

After the non-serving base station NodeB receives the above indicator (which can be carried in the Radio link SetupRequest message), it judges whether to establish Iub transmission bearer and forward uplink data, and sets the 'Transport Bearer Not Setup Indicator of the corresponding MAC-d flow in the Radiolink Setup Response 'Respectively: a: do not carry, and assign Iub transport layer Binding ID and Transport LayerAddress; b, set to Transport Bearer Not Setup; where a is compatible with the traditional method (corresponding to A or C in the request message), and b indicates NodeB confirmation Uplink macro-diversity data forwarding (corresponding to B or C in the request message) is not required.

On the basis of realizing the macro-diversity by means of the indicator described above, referring to FIG. 2, the process of the second embodiment of the present invention is as follows:

Step 201: Establish a data channel and a control channel for the serving radio link RL, and allocate demodulation resources for the data channel and the control channel of the serving RL;

This step is the same as the previous embodiment and will not be repeated here.

Step 202: Establish a data channel and a control channel for the non-serving RL, and allocate demodulation resources for demodulating the control channel to the non-serving RL;

This step is the same as the previous embodiment and will not be repeated here.

Step 203: the RNC sets corresponding indicators for the VOIP service and the high-speed upload service respectively, and sends them to the base station;

In this step, it is assumed that the method adopted by the RNC for the VOIP service is: A: not carried, which means that macro diversity is required for the VOIP service. The method adopted for the high-speed upload service is: set the "Transport Bearer Not Requested Indicator" of the corresponding MAC-d flow to B: set it to Transport Bearershall not be Established, which means that macro-diversity is not required for the high-speed upload service.

The indicator can be carried in the Radio link Setup Request message and sent to the base station.

Step 204: the base station allocates to low-speed VOIP services if there are remaining resources according to the received indicator;

In this step, the base station clearly knows that VOIP needs uplink macro-diversity according to the received indicator, while the high-speed upload service does not need uplink macro-diversity. In this case, if there are remaining resources, they will be allocated to VOIP services.

Step 205: If the resource is insufficient, according to the set preemption mechanism, the resource preemption of the serving RL to the non-serving RL is realized;

In this step, when the user in the serving cell needs to access and the demodulation resources are insufficient, the demodulation resources allocated for the VOIP service of the non-serving link in step 204 may be preempted.

In this step, if there are other high-speed services on the non-serving link occupying the demodulation resources, they will be preempted by the serving link first. If the demodulation resources are not enough, further preempt the demodulation resources allocated for the VOIP service of the non-serving link in step 204 .

In this step, scheduling priorities among different users may also be considered, and demodulation resources of non-serving RLs with lower scheduling priorities may be preempted first.

Subsequent steps are similar to the previous embodiment and will not be repeated here.

It is worth noting that, if in this embodiment, the indication of the RNC is C, it means that the NodeB decides whether to forward the uplink macro-diversity data. repeat.

Based on the dynamic allocation and preemption mechanism of demodulation resources in the method embodiment, there may also be a better technical solution:

For example, in the prior art, the CE allocation method is a fixed allocation method, and user access is performed according to the Maximum Set of E-DPDCHs, that is, regardless of the actual rate of the user, the CE corresponding to the "Maximum Set of E-DPDCHs" is fixedly occupied number. When the uplink enhanced link is used for data transmission, the uplink rate is greatly improved, and correspondingly, the consumption of CE resources is also greatly increased. and throughput bottlenecks. The disadvantage of user access based on the Maximum Set of E-DPDCHs is: when the user accesses, the RNC performs UE access according to the "Maximum Set of E-DPDCHs". The number of users is relatively small.

Based on this, and in the technical scheme of the embodiment of the present invention, RNC can perform user admission according to GBR (Guaranteed BitRate, guaranteed bit rate), like this, not only can reflect the QoS requirement of the user, compared with carrying out user according to Maximum Set of E-DPDCHs Access can also greatly increase the number of admitted users. The reasons are as follows: In general, because GBR is much smaller than MBR (Maximum Bit Rate, maximum bit rate), the number of CEs corresponding to MBR is greater than the number of CEs corresponding to GBR, and MinSF (Minimum Spreading Factor, minimum spreading factor) and MBR are Basically, the number of CEs corresponding to MinSF is also greater than the number of CEs corresponding to GBR, so user access according to GBR can greatly increase the number of admitted users. For example: if the total number of CEs issued by the base station is 32, the user's Maximum Set of E-DPDCHs is configured as 2SF4, and GBR is configured as 64kbps, if the number of CEs consumed by 2SF4 is 16 CEs, the SF corresponding to 64kbps is SF16, and the consumed The number of CEs is 2, so when performing user access according to the Maximum Set of E-DPDCHs according to the existing technology, the RNC can only admit 2 such HSUPA users, and when performing user access according to the GBR, the RNC can admit 16 users.

To sum up, in the technical solution provided by the embodiment of the present invention, when the radio link RL is established, both the non-serving RL data channel and the control channel are established, and demodulation resources are allocated for the control channel to ensure the interference control of adjacent cells. However, the demodulation resources of the data channel adopt a dynamic allocation mechanism according to the remaining resources of the current base station.

It can be understood that, to a certain extent, the data channel may correspond to the user plane UP, and the control channel may correspond to the control plane CP.

In addition, the CE resources of serving RL users and non-serving RL users are treated differently: when the load of the base station is relatively heavy, when users in the serving cell access or CEs belonging to serving RL users need to be increased and there are no redundant demodulation resources at present, Demodulation resources of users in non-serving cells can be preempted, so that CEs are fully allocated to serving RL users. Moreover, the priority policy used in the above dynamic allocation and preemption mechanism can be statically configured or dynamically adjusted to adapt to different network environments and communication requirements.

Further, user admission can be performed according to the GBR, thereby greatly increasing the number of admitted users.

Through the above technical solutions, under the premise of ensuring the interference control of adjacent cells, the dynamic allocation and preemption of resources according to a certain priority can improve the utilization rate of uplink demodulation resources, improve the throughput of the system, and increase the number of admitted users. Optimized system performance.

The simulation results can illustrate the technical effect of the preemption mechanism: two cases are simulated separately: one is not to preempt the CE of non-serving RL users; the other is to preempt the CE of non-serving RL users; the simulation is carried out in the scenario of the following simulation algorithm model : Wrap-Around scenario, 135UEs, Full Buffer, 128CE/NodeB, the simulation results are shown in Table 1.

Table 1 System throughput obtained under different strategies

System throughput (Mbps) The system throughput rate obtained by the existing technology (without preempting the CE of non-serving RL users) 7.82 The system throughput rate that the embodiment of the present invention obtains (preempting the CE of the non-serving RL user) 18

It can be seen from Table 1 that when the CEs of non-serving RL users are preempted, the throughput of the system increases from 7.82M to 18M, and the improvement is very significant.

The above embodiments are mainly described by taking the WCDMA system as an example. It can be understood that the technical solutions of the embodiments of the present invention are also applicable to other wireless networks supporting soft handover and uplink macro-diversity, such as E-HSPA flat architecture.

If it is E-HSPA, then the process is roughly the same, the difference is: (1) the network node that executes MDC is the enhanced base station NodeB+; (2) the interface between NodeB+ is the Iur interface; (3) the command selectivity In the case of macro diversity, the serving cell base station (with SRNC function) sends the indicator.

In addition, if the MDC function is still reserved in the LTE/SAE system, the difference from WCDMA is: (1) The network node implementing MDC is an evolved base station E-NodeB. (2) The interface between E-NodeBs is the X2 interface. (3) For the LTE/SAE system, the channel is different from that in WCDMA.

The embodiment of the present invention also provides a base station, and FIG. 3 is a schematic structural diagram of the base station provided by the embodiment of the present invention.

The base station includes: an establishment unit 301, configured to establish a data channel and a control channel for the serving radio link RL and a non-serving RL; a first resource allocation unit 302, configured to allocate demodulation resources for the data channel and the control channel of the serving RL, and allocate control channel demodulation resources for the non-serving RL; the second resource allocation unit 303 is configured to allocate demodulation resources between the serving RL and the non-serving RL, and the priority of the non-serving RL to allocate demodulation resources is lower than that of the serving RL The RL assigns the priority of demodulation resources.

For users of the serving RL, the establishment unit 301 establishes data channels and control channels for them, and the first resource allocation unit 302 allocates demodulation resources for the data channels and control channels of the serving RL.

In order to ensure the need for interference control of adjacent cells in macro-diversity combining, the base station reserves the minimum number of CEs required for processing control channels for the non-serving RL. When the base station receives a non-serving RL establishment request initiated by a non-serving RL user, the first resource allocation unit 302 allocates demodulation resources for demodulating the control channel for the non-serving RL, that is, assigns the non-serving RL user Meet the minimum number of CEs required to process its non-serving RL control channel. On this basis, the second resource allocation unit 303 allocates demodulation resources between the serving RL and the non-serving RL according to the demodulation resources (CE resources) of the base station.

In order to realize dynamic allocation, the base station may further include: a first storage unit 304, which is used to store the demodulation resource dynamic allocation mechanism of the non-serving RL, the basis of the dynamic allocation is the dynamic allocation priority, and the dynamic allocation priority represents different The relative priority of demodulation resource allocation between non-serving RLs, and/or the relative priority of demodulation resource allocation among different services carried by non-serving RLs. Adapting to this, the second resource allocation unit 303 can be further divided into: a first judging subunit, used to judge whether the remaining demodulation resources of the base station are insufficient when establishing a non-serving RL, and the remaining demodulation resources are: After allocating demodulation resources for the data channel and control channel of the serving RL, and allocating demodulation resources for the control channel of the non-serving RL, the remaining demodulation resources of the base station; the allocation subunit is used for judging by the first judging subunit When the result is yes, allocate the remaining demodulation resources to the non-serving RL according to the dynamic allocation mechanism of demodulation resources of the non-serving RL stored in the storage unit 304 . Of course, if there are no remaining demodulation resources, no allocation will be made. It can be understood that when non-serving RL is established, it has no effect on the demodulation resources allocated to serving RL, that is, the priority of non-serving RL is lower than that of serving RL. The set dynamic allocation priority allocates the remaining demodulation resources for non-serving RLs. The specific allocation process has been described in detail in the method embodiments, so it is not repeated here.

In order to realize the preemption of the serving RL to the non-serving RL, the base station may further include: a second storage unit 305 for storing the preemption mechanism of the serving RL to the non-serving RL, the basis of the preemption mechanism is the preemption priority, and the preemption priority The level represents the relative priority preempted by the serving RL between different non-serving RLs, and/or the relative priority preempted by the serving RL between different services carried by the non-serving RL. Adapting to this, the second resource allocation unit includes: a second judging subunit, configured to judge whether there is a new serving RL or a serving RL that needs new demodulation resources and the current There are no redundant demodulation resources; the preemption subunit is used to preempt the demodulation resources of the non-serving RL according to the preemption mechanism stored in the second storage unit when the judgment result of the second judgment subunit is yes, and set The preempted demodulation resources are allocated to the serving RL. The specific preemption process has been described in detail in the method embodiments, so it is not repeated here.

In addition, the base station also includes an admission unit, configured to perform user admission according to the guaranteed bit rate. In this way, the number of admitted users can be greatly increased.

An embodiment of the present invention also provides a demodulation resource allocation system, which includes users in addition to the base station provided in the above embodiments. Wherein, the users include users corresponding to the non-serving radio link RL and users corresponding to the serving RL. The technical features of the base station provided by the system, the divided unit modules, and the logic and connection relationship between each module have been described in detail above, and will not be repeated here.

In addition, the system may also include a network node that performs macro-diversity combining, and the network node is a radio network controller RNC, or an enhanced base station NodeB+; or an evolved base station E-NodeB.

The base station and the system provided in the above embodiments, the technical effects brought about by the technical features involved have been described in detail in the method embodiments, and are not repeated here.

Those of ordinary skill in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the program can be executed when executed , including the steps of: establishing a data channel and a control channel for the serving radio link RL and the non-serving RL, and allocating demodulation resources for the data channel and the control channel of the serving RL, and allocating demodulation resources for the control channel for the non-serving RL; Demodulation resources are allocated between the serving RL and the non-serving RL, and the priority of the demodulation resources allocated by the non-serving RL is lower than the priority of the demodulation resources allocated by the serving RL.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, each unit may exist separately physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

Although the present invention has been described by the examples, those skilled in the art know that there are many variations and changes in the present invention without departing from the essence of the invention, and the claims of the application documents of the present invention include these variations and changes.

Claims (15)

1. a demodulation resource distribution method is characterized in that, comprising:

Set up data channel and control channel for serving Radio Link RL and non-service RL, and for data channel and the control channel of service RL distributes demodulation resource, and be the control channel distribution demodulation resource of non-service RL;

Distribute demodulation resource between service RL and non-service RL, described non-service RL distributes the priority of demodulation resource to be lower than the priority that service RL distributes demodulation resource.

2. the method for claim 1 is characterized in that, the described demodulation resource of distributing between service RL and non-service RL comprises:

When setting up non-service RL, if the remaining demodulation resource deficiency in base station, then according to the dynamic assignment mechanism of setting, for non-service RL distributes described remaining demodulation resource,

Described remaining demodulation resource is: be that the data channel of service RL and control channel distribute demodulation resource, and be after the control channel distribution demodulation resource of non-service RL, the remaining demodulation resource in base station; The foundation of described dynamic assignment mechanism is a dynamic assignment priority, distribute the relative priority level of demodulation resource between the different non-service RL of described dynamic assignment priority representative, and/or distribute the relative priority level of demodulation resource between the different business of non-service RL carrying.

3. method as claimed in claim 2 is characterized in that, and is described according to the dynamic assignment mechanism of setting, and comprises one of following or its combination for non-service RL distributes described remaining demodulation resource:

Be preferably the high non-service RL of dispatching priority of users and distribute described remaining demodulation resource; Or

Be preferably the described remaining demodulation resource of traffic assignments that needs grand diversity merging or grand diversity to merge the high non-service RL of demand priority level; Or

Be preferably the described remaining demodulation resource of traffic assignments of the lower non-service RL of service rate.

4. as claim 2 or 3 described methods, it is characterized in that described method also comprises: if there is new demodulation resource to utilize, again for not distributing the traffic assignments demodulation resource of demodulation resource before the non-service RL.

5. the method for claim 1 is characterized in that, the described demodulation resource of distributing between service RL and non-service RL comprises:

In non-service RL connection procedure, if having new service RL or service RL to need new demodulation resource and current when not having unnecessary demodulation resource, according to the preemption mechanism of the service RL that sets to non-service RL, service RL seizes the demodulation resource of non-service RL,

The foundation of described preemption mechanism is a preempting priority, and described preempting priority is represented the relative priority level that serviced RL seizes between the different non-service RL, and/or the relative priority level that serviced RL seizes between the different business of non-service RL carrying.

6. method as claimed in claim 5 is characterized in that, described service RL is according to preempting priority, and the demodulation resource of seizing non-service RL comprises one of following or its combination:

Preferentially seize and be the low non-service demodulation resource that RL distributed of dispatching priority of users; Or

Preferentially seize the demodulation resource of distributing for the business that does not need grand diversity merging or grand diversity to merge the low non-service RL of demand priority level; Or

Preferentially seize the demodulation resource of distributing than the business of higher non-service RL for service rate.

7. as claim 3 or 6 described methods, it is characterized in that, described grand diversity merges into by the base station to decide whether carry out the grand diversity merging of selectivity that grand diversity merges in its sole discretion, described base station merges the demand priority level to grand diversity and carries out grand diversity merging than higher business, and described base station merges the lower business of demand priority level to grand diversity and do not carry out grand diversity merging; Or

The grand diversity of selectivity that described grand diversity is merged into by send the indication realization to the base station merges, and described indication comprises the professional indication that whether needs grand diversity to merge, or the professional indication that whether needs grand diversity merging to be decided in its sole discretion by the base station; Described base station determines according to the business the indication whether grand diversity of needs merges whether described indication corresponding service needs grand diversity to merge.

8. as each described method of claim 1 to 6, it is characterized in that, according to guaranteeing that bit rate carries out user's access.

9. as each described method of claim 1 to 6, it is characterized in that described demodulation resource is Channel Elements CE.

10. a base station is characterized in that, comprising:

Set up the unit, be used to service Radio Link RL and non-service RL to set up data channel and control channel;

First resource allocation unit is used to the data channel of service RL and control channel to distribute demodulation resource, and is that non-service RL distributes the control channel demodulation resource;

Second resource allocation unit is used for distributing demodulation resource between service RL and non-service RL, and described non-service RL distributes the priority of demodulation resource to be lower than the priority that service RL distributes demodulation resource.

11. base station as claimed in claim 10, it is characterized in that, described base station also comprises first memory cell, be used to store the demodulation resource dynamic assignment mechanism of non-service RL, the foundation of described dynamic assignment is a dynamic assignment priority, distribute the relative priority level of demodulation resource between the different non-service RL of described dynamic assignment priority representative, and/or distribute the relative priority level of demodulation resource between the different business of non-service RL carrying;

Described second resource allocation unit comprises:

First judgment sub-unit, when being used to set up non-service RL, judge whether the remaining demodulation resource in base station is not enough, described remaining demodulation resource is: be data channel and the control channel distribution demodulation resource of service RL, and be that the control channel of non-service RL distributes after the demodulation resource the remaining demodulation resource in base station; And

Distribute subelement, be used for when the judged result of described first judgment sub-unit when being, the dynamic assignment mechanism of the non-RL of service that stores according to described memory cell is for described non-service RL distributes described remaining demodulation resource.

12. base station as claimed in claim 10, it is characterized in that, described base station also comprises second memory cell, be used for the preemption mechanism of stores service RL to non-service RL, the foundation of described preemption mechanism is a preempting priority, described preempting priority is represented the relative priority level that serviced RL seizes between the different non-service RL, and/or the relative priority level that serviced RL seizes between the different business of non-service RL carrying;

Described second resource allocation unit comprises:

Second judgment sub-unit is used for setting up process at non-service RL, judges whether that new service RL or service RL need new demodulation resource and currently do not have a unnecessary demodulation resource;

Seize subelement, be used for when the judged result of described second judgment sub-unit when being, according to the preemption mechanism that described second memory cell is stored, seize the demodulation resource of non-service RL, and the demodulation resource of seizing distributed to service RL.

13., it is characterized in that as each described base station of claim 10 to 12, also comprise the access unit, be used for according to guaranteeing that bit rate carries out user's access.

14. a demodulation resource distribution system is characterized in that, comprises as each described base station of claim 10 to 13, and the user, described user comprises non-service Radio Link RL user and service RL user.

15. system as claimed in claim 14 is characterized in that, also comprises in the described system carrying out the network node that grand diversity merges, described network node is a radio network controller (RNC), or enhanced base station NodeB+, or evolved base station E-NodeB.

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