WO2011131119A1 - Method and apparatus for allocating component carriers in carrier aggregation - Google Patents

Abstract

The present invention discloses a method and an apparatus for allocating component carriers in carrier aggregation. The said method includes that: a base station collects component carrier usage quality information of a user equipment; the base station configures component carriers for the user equipment according to the collected component carrier usage quality information of the user equipment. The said apparatus includes a collector and a configurator set in the base station. The said collector is used to collect component carrier usage quality information of the user equipment. The said configurator is used to allocate component carriers for the user equipment according to the component carrier usage quality information of the user equipment collected by the collector. By applying the said method and apparatus, the validity of a user using component carriers can be guaranteed.

Description

 Method and device for component carrier allocation in carrier aggregation

 The present invention relates to the field of wireless communications, and in particular, to a carrier allocation method and apparatus for carrier aggregation. Background technique

 In the next generation of broadband wireless communication networks, solving how wireless networks support larger bandwidths in the bandwidth of current wireless communication systems is a key factor in improving the throughput of inter-cell user terminals and the average throughput of user terminals. Faced with severe challenges.

 The Long Term Evolution-Advanced (LTE-A) system is a next-generation evolution system of the Third Generation Partnership Project (3GPP) Long Term Evolution (LTE), which proposes carrier aggregation technology. Provide more bandwidth for user equipment (UE, User Equipment) and increase the peak rate of the UE to meet the requirements of throughput, peak rate and other indicators in the new generation wireless standard. In LTE, the maximum downlink transmission bandwidth supported by the system is 20MHz. By carrier aggregation technology, two or more component carriers can be aggregated to support a transmission bandwidth greater than 20MHz.

Although carrier aggregation has the advantage of providing greater bandwidth, improper carrier aggregation will affect the effectiveness of carrier aggregation technology applications. For example, small-area interference has a huge impact on the throughput and average throughput of user equipment. If the user equipment consists of carriers with severe inter-cell interference, even if larger bandwidth is obtained through carrier aggregation, The aggregated carrier contains the interfered carrier, which seriously degrades the throughput and rate performance of the user equipment, which offsets the benefits of carrier aggregation. Summary of the invention

 The technical problem to be solved by the present invention is to provide a component carrier allocation method and apparatus in carrier aggregation, which can improve the effectiveness of carrier aggregation application.

 In order to solve the above technical problems, the present invention uses the following technical solutions:

 A component carrier allocation method in carrier aggregation, the method comprising:

 The base station collects the user equipment to form the carrier use quality information, and composes the carrier use quality information according to the collected user equipment, and configures the component carrier for the user equipment.

 In an embodiment of the present invention, the user equipment component carrier quality information includes: a user equipment component carrier measurement performance parameter, a user equipment component carrier path loss, and a small interval interference.

 In an embodiment of the present invention, before the base station collects the user equipment to form the carrier usage quality information, the method further includes the following steps: the base station determines the bandwidth capability of the user equipment; and the base station allocates the component to the user equipment according to the bandwidth capability of the user equipment. Carrier.

 In an embodiment of the present invention, the base station is further configured with a component carrier reselection threshold; the base station configures a component carrier for the user equipment according to the carrier service quality information of the user equipment, where: the base station compares the component carrier quality. The information and the component carrier reselection threshold, if the component carrier quality information is greater than the reselection threshold, the base station reassigns the component carrier to the user equipment.

 In an embodiment of the present invention, after the base station allocates a component carrier to the user equipment, the method further includes: the base station further grouping the component carriers, and different packets adopt different transmission schemes.

In an embodiment of the present invention, the base station presets a component carrier selection and a merge threshold, and is used to compare the component carrier quality information when the component carrier use quality information is less than a reselection threshold. If the component carrier use quality information is greater than the component carrier selection and the merge threshold, the original component of the carrier is split and the component carrier is regrouped; otherwise, the original packet is merged. The present invention also provides a component carrier allocation device in carrier aggregation, the device includes: a collector and a configurator disposed in a base station; the collector is configured to collect user equipment to form carrier use quality information, The configurator is configured to form carrier component quality information according to the user equipment collected by the collector, and allocate a component carrier to the user equipment.

 In an embodiment of the present invention, the apparatus further includes a comparator disposed at the base station, configured to compare the usage quality information collected by the collector and the component carrier reselection threshold preset by the base station, when the component carrier is configured When the quality information is greater than the reselection threshold, the configurator reassigns the component carrier to the user equipment.

 In an embodiment of the present invention, the configurator is further configured to allocate different transmission schemes to different components of the component carrier group.

 In an embodiment of the present invention, the comparator is further configured to: when the component carrier usage quality information is less than a reselection threshold, compare the used quality information with a component carrier selection and a combination threshold preset by the base station, If the component carrier use quality information is greater than the component carrier selection and the merge threshold, the original component of the carrier is split and the component carrier is regrouped; otherwise, the original packet is merged.

 The invention has the beneficial effects that: the base station uses the quality information according to the component carrier of the user equipment, and configures the component carrier for the user equipment. For example, when the component carrier quality is good, the original component carrier can continue to be used; When the quality is deteriorated, the component carriers used by the user equipment can be adjusted to ensure the quality of use of the carrier equipment of the user equipment, and the carrier aggregation technology is effectively utilized. DRAWINGS

 FIG. 1 is a schematic flowchart of a component carrier allocation method according to an embodiment of the present invention. detailed description

The present invention relates to carrier aggregation, which is a gateway for supporting greater bandwidth in a wireless communication system. Key technology, which aggregates different carriers to form a larger bandwidth. However, there is a problem that if the aggregated carrier component is severely interfered, even if a larger bandwidth is obtained, the throughput and rate performance of the user equipment using the partial carrier are seriously degraded due to interference, thereby offsetting The main idea of the present invention is that the base station selects and allocates a suitable component carrier for the user equipment according to the real-time situation of the carrier equipment of the user equipment. In this way, the real-time situation of the component equipment of the user equipment can be effectively reflected, and the influence of inter-cell interference is effectively reduced, so that the carrier aggregation technology can be effectively utilized. The main steps of the technical solution are: the base station collects the user equipment to form the carrier use quality information; the base station composes the carrier use quality information according to the collected user equipment, and configures the component carrier for the user equipment.

 In the embodiment of the present invention, the user equipment component carrier quality information includes but is not limited to: the user equipment component carrier measurement performance parameter, the user equipment component carrier path loss, and the small interval interference. The user equipment component carrier quality is a measurement determined by the user equipment to measure a selected quality indicator (e.g., inter-cell interference).

 Before the user equipment is configured to use the carrier quality information to configure the carrier, the user equipment must be initially configured. The initial configuration of the component carrier can utilize the bandwidth capability of the user equipment, that is, the base station determines the bandwidth of the user equipment. Capabilities, and assign component carriers to user devices according to the bandwidth capabilities of the user equipment. The base station allocates a component carrier to the user equipment according to the bandwidth and performance requirements of the user equipment, and sets an initial grouping of the component carriers. The initial grouping may divide all component carriers into one group, or may be divided into multiple groups, or may be The base station sets the component carrier group according to performance indicators such as bandwidth, path loss, throughput, and peak rate. For example, for a user equipment in a cell center or a hotspot, only one component carrier group is set. For a cell edge user, multiple component carrier groups can be set in consideration of path loss and inter-cell interference, and each component carrier group is used. Different transmission schemes, such as multiple input and multiple output, cooperative point transmission and reception technologies. After grouping, each packet is assigned a physical cell identity.

The base station may preset a component reselection threshold (a threshold value of one) to perform reselection of the component carrier. As described above, in the foregoing embodiment, the user equipment component carrier quality information reflects the inter-cell interference, that is, the greater the component carrier quality information, indicating that the carrier equipment quality of the user equipment component is worsened, and vice versa. It indicates that the user equipment component carrier quality is developing in a good direction. Therefore, in this example, the base station configures the component carrier for the user equipment according to the component usage quality information of the user equipment, and specifically includes: the base station compares the component carrier quality information and the component carrier reselection threshold, if the component carrier quality information is greater than the weight When the threshold is selected, the base station re-allocates the component carriers for the user equipment and groups the re-allocated component carriers. When the quality information used is less than the component carrier reselection threshold, the base station may not act.

 The base station may also preset a component carrier selection and a merge threshold (a threshold value 2) for comparing the quality information with the use quality information when the quality information is less than the reselection threshold, and if the quality information used is greater than the component carrier selection and the merge threshold, The original grouping of the carrier is split, and the component carriers are re-grouped, that is, the grouping method is different from the previous grouping method, and the physical cell identifier is re-allocated for each group; otherwise, the user equipment component carriers are combined into one group. , of course, can also be combined into two or more. The carriers that are subject to strong interference can be divided into one group, and the ones that are weakly interfered are divided into one group, and the ones that are not interfered are divided into one group, and the targeted transmission schemes are taken for different groups. It should be noted that this is only one Grouping, not unique.

 The carrier selection and summation thresholds represent the refinement of the component carrier group. That is, when the carrier device usage quality of the user equipment is greater than the reselection threshold, the component carrier needs to be reselected, and the carrier device quality of the user equipment component is less than the weight. If you choose a wide value, you do not need to reselect the component carrier. However, in this interval, it is further divided into: The user equipment component carrier quality is greater than the selection and merging threshold, indicating that the component carrier quality has become worse. Therefore, by splitting the packet, the component is used in a poor quality composition. The carrier grouping is distinguished from the component carrier group with good quality. When the user equipment component carrier quality is smaller than the selection and combining threshold, indicating that the quality of all component carriers is good, the grouping can be combined to reduce the grouping.

The above component carrier reselection threshold and component carrier selection and merging threshold can be based on the user The bandwidth capability of the device is determined.

 An apparatus for composing a carrier in a carrier aggregation according to an embodiment of the present invention includes: a collector and a configurator disposed in a base station, where the collector is configured to collect user equipment to form carrier use quality information, where the configurator is used by the configurator The user equipment is configured to use the quality information according to the user equipment collected by the collector, and the component equipment is allocated to the user equipment.

 The configurator can also be used to group component carriers, each group being assigned a particular transmission scheme. Further, the device further includes a comparator disposed at the base station, configured to compare the usage quality information collected by the collector and the component carrier reselection threshold preset by the base station, when the component carrier quality information is greater than the reselection width In the case of the value, the configurator reassigns the component carrier to the user equipment.

 The comparator may be further configured to: when the component carrier quality information is less than the reselection threshold, compare the used quality information with the component carrier selection and combining thresholds preset by the base station, and form, merge, and split the component carrier according to the comparison result. .

 A specific application example of the present invention is specifically described below with reference to FIG. 1. The specific steps are as follows: Step 1: The base station determines the bandwidth capability of the user terminal, including: user equipment bandwidth and performance requirements;

 Step 2: The base station presets a threshold of one and a threshold of two;

 In this step, the threshold value is a component carrier reselection threshold, and the threshold value 2 is a component carrier group selection and a combination threshold value, and the threshold value 2 is less than the threshold value one.

 Step 3: The base station allocates component carriers and groups the user equipments.

 Specifically, the base station allocates a corresponding component carrier to the user terminal according to the bandwidth capability of the user terminal, and groups the allocated component carriers.

 Step 4: The base station collects the user equipment to form the carrier usage quality information, and determines the measured value. In this step, the user equipment component carrier quality information includes: a component carrier measurement performance parameter used by the user equipment, and a component carrier used by the user equipment. Road loss, small interval interference.

Step 5: Compare the measured value with the threshold value. If the measured value is greater than the threshold value, go to step 6. Otherwise go to step 7;

 Step 6: The base station reassigns the component carriers to the user equipment and groups them, and ends;

 Step 7: Compare the measured value with the threshold value 2. If the measured value is less than the threshold value 2, go to step 8, otherwise go to step 9;

 Step 8: The base station merges to form a carrier group, and ends;

 Step 9: The base station splits the original component carrier group to form a new component carrier group, and ends. The invention uses the component carrier usage quality information of the UE, and configures the component carrier for the UE accordingly, so that the UE can effectively apply the carrier aggregation technology, fully utilize the superiority of the carrier aggregation technology, and avoid inter-cell interference and other problems to cancel the carrier. The advantages of aggregation.

 The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It is to be understood by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

Claims

Claim  A component carrier allocation method in carrier aggregation, the method comprising: the base station collecting user equipment to form carrier use quality information, and composing carrier usage quality information according to the collected user equipment, configuring a component for the user equipment Carrier.  2. The method according to claim 1, wherein the user equipment composing carrier usage quality information comprises: a user equipment component carrier measurement performance parameter, a user equipment component carrier path loss, and a small interval interference.  The method according to claim 1, wherein the method further comprises: the base station determining a bandwidth capability of the user equipment; and the base station is configured according to the bandwidth capability of the user equipment, before the base station collects the user equipment to form the carrier usage quality information. User equipment is allocated to form a carrier.  The method according to claim 1, wherein the base station is further configured with a component carrier reselection threshold; the base station configures a component carrier for the user equipment according to the carrier service quality information of the user equipment, as: When the component carrier quality information and the component carrier reselection threshold are compared, and the component carrier quality information is greater than the reselection threshold, the base station re-allocates the component carrier for the user equipment.  The method according to claim 4, wherein after the base station allocates a component carrier to the user equipment, the method further includes: the base station further grouping the component carriers, and different packets adopt different transmission schemes.  The method according to claim 5, wherein the base station presets a component carrier selection and a merge threshold, and is configured to: when the component carrier use quality information is less than a reselection threshold, and the component carrier Using the quality information comparison, if the component carrier usage quality information is greater than the component carrier selection and combining threshold, splitting the carrier original packet and re-grouping the component carrier; otherwise, combining the original packet. A component carrier allocation device in a carrier aggregation, the device includes: a collector and a configurator disposed in a base station; the collector is configured to collect user equipment to form a carrier Using the quality information, the configurator is configured to allocate carrier component quality information according to the user equipment collected by the collector, and allocate a component carrier to the user equipment.  The device according to claim 7, wherein the device further comprises a comparator disposed at the base station, configured to compare the usage quality information collected by the collector and the component carrier reselection preset by the base station The configurator re-allocates the component carrier for the user equipment when the component carrier quality information is greater than the reselection threshold.  9. The apparatus according to claim 8, wherein the configurator is further configured to group carrier carriers, and different packets are assigned different transmission schemes.  The device according to claim 9, wherein the comparator is further configured to: when the component carrier usage quality information is less than a reselection threshold, compare the used quality information with a component carrier preset by the base station. And the merging value, if the component carrier quality information is greater than the component carrier selection and merging threshold, splitting the original carrier group and re-grouping the component carriers; otherwise, merging the original packets.