34results about How to "Reduce the number of users" patented technology

The invention aims to reduce the energy consumption and improve the energy efficiency of a system through selection of cooperative relay users and the distribution of relay power under the condition that the throughput capacity of the system is ensured. The invention discloses a method for cooperative multicast among users based on the energy efficiency. The method comprises the following steps of: dividing the multicast process into two stages, and at the first stage, multicasting data to all the users at a high speed by a base station, ensuring that a part of the users with good channel conditions correctly decode the data, estimating channel state information between the remaining users with bad channel conditions and the users correctly decoding the data, finding a user who has the best channel condition and correctly decodes the data relative to each user with a bad channel condition, and using the user correctly decoding the data as a relay; and at the second stage, reasonably distributing the power of each relay by using the estimated channel state information between the relay users and the remaining users with the bad channel conditions, and multicasting data to the remaining users with the bad channel conditions by using selected relays.

The embodiment of the invention provides an information recommendation method and device and relates to the technical field of Internet. By means of the information recommendation method and device, user equipment using a recommendation list can be predicted, the recommendation list of the predicted user equipment using the recommendation list can be updated, the number of users needing to update the recommendation list is reduced, computing resources are saved, and the recommendation list can be updated in time for the user equipment which will use the recommendation list. The method comprises the steps that a first prediction result is obtained at first time, wherein the first prediction result comprises the predicted user equipment which will use the recommendation list at second time and third time, the first time is earlier than the second time, and the second time is earlier than the third time; according to the first prediction result, the recommendation list is generated for the predicted user equipment which will use the recommendation list at the second time and the third time.

The present invention relates to a partial user feedback method for a limiting feedback multi-input and multi-output (MIMO) multi-user system, arranging different random vector codebook sets for a base station and a user terminal. A random vector codebook set at the base station is a subset of the random codebook set for the user terminal. Based on the resultant random vector codebook set for the user, the user measures a channel vector direction. After the channel vector direction of the user is quantified and positioned into the base station, the user of the random vector codebook set is eligible to feed back. In addition, the user eligible for feedback feeds back channel gain and channel direction vector index based on the random codebook set to the base station at each time slot. Thus, the base station carries out channel re-creating to the user in light of the channel direction vector index and the channel gain fed back by the user and the random vector codebook set at the base station. In addition, the base station carries out transmission users set selection only in the re-created user channel participating in the feed back. The partial user feedback method for a limiting feedback multi-input and multi-output (MIMO) multi-user system provided by the present invention has the advantages of reducing feedback expense, enhancing system throughput rate, and being suitable for use in practical systems.

The invention provides a pilot random access method based on timing advance information and aims to solve the technical problem of the small number of successful access users during higher system load in the conventional pilot random access method. The method comprises the following steps: 1, propagation delay and cell radius of users are quantized; 2, the users select pilot sequences; 3, the users send pilot sequences with addition of cyclic prefixes as well as identification codes; 4, a base station sends pilot random access response information; 5, the users judge whether themselves meet timing advance information requirements, if yes, step 6 is executed, otherwise, pilot random access is finished; 6, the strongest user resends the pilot sequence and the identification code; 7, the base station sends collision resolution information. With adoption of the method, the number of successful access users is high during higher system load, and the problem of pilot pollution in a massive MIMO (multiple-input multiple-output) system can be solved.

The invention discloses a method and a device for monitoring the service traffic of mobile Internet. The method comprises monitoring the traffic of Gn interfaces to generate traffic records; according to the Internet protocol (IP) address and the uniform resource locator (URL) of an application server in the traffic records, computing the average traffic of the application server, which is generated within a first preset time; when the calculated average traffic exceeds a first preset threshold value, calculating the frequency that the application server sends push notification messages with the first preset time; determining whether the obtained frequency exceeds a second preset threshold value or not; if so, enabling the application server to reduce the frequency of sending the push notification messages by itself or stop sending the push notification messages or reduce the number of users receiving the push notification messages. The method for monitoring the service traffic of mobile Internet can effectively control network traffic.

The invention discloses a large-scale MIMO cooperative user scheduling method, which mainly solves the problem that the channel state information is compressed or quantized in the prior art, which causes the spectrum efficiency of the system to decrease. The implementation steps are: 1. The base station sends the training sequence to the user, and the user estimates the channel information according to the received signal and the sent training sequence; 2. Groups the users in the system and sets a timer for the user; 3. Through timing The device finds the user with the largest channel norm to broadcast its channel state information to other users in the group; 4. Calculate the correlation coefficient between other users in the group and the user with the largest channel norm, and the user whose correlation coefficient is smaller than the given threshold of the system sends the information to the base station Feedback its channel state information; 5. The base station calculates the sending user set, and sends the sending signal to the user after beamforming. The invention can effectively reduce the amount of system feedback and improve system downlink resources under the premise of less impact on the system and speed.