1. A system for increasing Signal-to-Noise Ratio (SNR) in a wireless communication system, comprising:
a plurality of antennas, each antenna providing a signal;
a device, coupled to said plurality of antennas, for selecting a subset of signals provided by said plurality of antennas;
a maximal-ratio combiner responsive to said subset of signals for developing an output signal; and
a decision device for measuring the each signal of said subset against a predefined threshold, and for replacing a signal z of said subset of signals with a signal of said plurality of antennas that is not currently selected when said measuring determines that said signal z ought to be replaced.
2. The system according to claim 1, wherein said plurality of antennas further comprises four antennas.
3. The system according to claim 2, wherein said four antennas are arranged such that there are two antennas at each of two positions to accomplish spatial diversity and each of said two antennas at each of said two positions are in cross-polarization with each other in order to accomplish polarization diversity.
4. The system according to claim 1, wherein said selecting device selects the two largest signals from said signals provided by said plurality of antennas.
5. A method for increasing Signal-to-Noise Ratio (SNR) in a wireless communication system, comprising the steps of:
receiving a signal from each of a plurality of antennas;
selecting a subset of signals provided by said plurality of antennas;
summing said selected subset of signals provided by said plurality of antennas;
measuring each signal of said selected subset of signals against a predefined threshold; and
periodically determining, based on said step of measuring, whether one of the signals of said selected subset ought to be replace, and replacing said one signal with another of said selected subset of signals provided by said plurality of antennas when said determining concludes that said one of the signals has fallen below said threshold.
6. The method according to claim 5, further comprising the step of optionally adjusting each of said selected subset of signals provided by said plurality of antennas by a coefficient.
7. The method according to claim 5, wherein said plurality of antennas further comprises four antennas.
8. The method according to claim 7, wherein said four antennas are arranged such that there are two antennas at each of two positions to accomplish spatial diversity and each of said two antennas at each of said two positions are in cross-polarization with each other in order to accomplish polarization diversity.
9. The method according to claim 5, wherein said selecting step selects the two largest signals from said signals provided by said plurality of antennas.
10. A system for increasing Signal-to-Noise Ratio (SNR) in a wire less communication system, comprising the steps of:
means for receiving a signal from each of a plurality of antennas;
means for selecting a subset of signals provided by said plurality of antennas;
means for summing said selected subset of signals provided by said plurality of antennas;
means for measuring each signal of said selected subset of signals against a predefined threshold; and
means for replacing one signal of said selected subset of signals provided by said plurality of antennas that has fallen below said threshold in a single time cycle.
11. The system according to claim 10, further comprising means for optionally adjusting each of said selected subset of signals provided by said plurality of antennas by a coefficient.
12. The system according to claim 10, wherein said plurality of antennas further comprises four antennas.
13. The system according to claim 12, wherein said four antennas are arranged such that there are two antennas at each of two positions to accomplish spatial diversity and each of said two antennas at each of said two positions are in cross-polarization with each other in order to accomplish polarization diversity.
14. The system according to claim 10, wherein said means for selecting selects the two largest signals from said signals provided by said plurality of antennas.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-30. (canceled)
31. A method for establishing an authorization to access resource in Machine-to-Machine (M2M) communication, when entity selected from a terminal, a gateway and an end user as a client in an M2M service provider domain attempts to access resource located in a service layer of an M2M server for providing an M2M service in the same M2M service provider domain, the method comprising:
receiving by the client a client credential allocated from an authentication server for providing an authentication service which is required in the M2M service provider domain by performing a client registration to the service layer by the client;
requesting by the client an authorization to access the resource to a resource owner of the resource based on information about a Resource_URI of the resource;
verifying, by the resource owner, the client through the authentication server;
granting, by the resource owner, the authentication server the authorization for the client to access the resource; and
issuing an access token to the client by the authentication server.
32. The method of claim 31, further comprising:
issuing an authorization code to the client by the authentication server; and
requesting an access token to the authentication server by using the issued authorization code by the client.
33. The method of claim 31, further comprising acquiring, by the client, the information about the URI of the resource through the service layer.
34. The method of claim 31 wherein the authentication server is an Authentication, Authorization, and Accounting (AAA) server, or a server providing an AAA service in a third M2M service provider domain.
35. The method of claim 31, wherein a lifetime is set for the access token.
36. A method for accessing resource located in a service layer of an M2M server for providing an M2M service in a Machine-to-Machine (M2M) service provider domain by an entity selected from a terminal, a gateway and an end user as a client in the same M2M service provider domain, the method comprising:
receiving a client credential allocated from an service layer in the M2M service provider domain by performing a client registration to a Network Service Capabilities Layer (NSCL) in the M2M service provider domain;
requesting an authorization to access the resource to a resource owner of the resource based on information about a Universal Resource Identifier (URI) of the resource;
receiving an access token issued from an authentication server for providing an authentication service which is required in the M2M service provider domain; and
accessing the resource based on the issued access token.
37. The method of claim 36, further comprising acquiring information about the resource through one of the service layer and the resource owner.
38. The method of claim 36, further comprising:
getting an authorization code issued from the authentication server; and
requesting the access token based on using the authorization code issued from the authentication server.
39. The method of claim 36, wherein the client credential includes Client_identifier identifying the client and Client_Secret used as a password corresponding to the Client_identifier.
40. A method for establishing an authorization of a client to access resource located in a service layer of an M2M server for providing an M2M service in a Machine-to-Machine (M2M) service provider domain by a resource owner of the resource, the client being one of a terminal, a gateway, and an end user in the M2M service provider domain, the method comprising:
receiving an authorization request for the client;
verifying the client through an authentication server for providing an authentication service which is required in the M2M service provider domain; and
authorizing the client to access the authentication server.
41. The method of claim 40, wherein the reception of an authorization request comprises receiving an authorization request message for the client through the service layer, and
wherein the authorization request message includes information about a client credential of the client and an authorization type.
42. The method of claim 41, wherein the verification of the client comprises determining whether the client is rightfully registered to the authentication server based on the information about the client credential of the client.
43. The method of claim 40, wherein the authorization comprises:
requesting the service layer for a generation or update of an access right resource for the resource; and
notifying the authentication server that the client has been authorized.
44. A method for authorizing access of a client to a resource by a service layer of an M2M server for providing an M2M service having the resource in Machine-to-Machine (M2M) communication, the method comprising:
receiving an authorization request from the client;
forwarding the authorization request to a resource owner of the resource;
receiving an access authorization request for the client from the resource owner;
establishing an authorization of the client to access the resource;
receiving an access token issued with respect to the resource from an authentication server for providing an authentication service; and
determining whether to authorize the client to access the resource according to whether the access token issued from the authentication server is identical to an access token presented by the client.
45. (canceled)
46. (canceled)
47. The method of claim 44, wherein the receiving of the authorization request comprises receiving from the client an authorization request message including information about a Resource_URI, a client credential and an authorization type.
48. The method of claim 47, wherein forwarding of the authorization request comprises
performing a discovery of a resource owner corresponding to the information about the Resource_URI and transmitting the authorization request message to the discovered resource owner.
49. The method of claim 48, wherein the service layer acquires information about the resource owner from an attribute of one of another object service layer, an application, a container resource, and a location container resource.
50. The method of claim 44, wherein the receiving of the authorization request comprises
receiving an authorization request message including information about at least one of a client credential of the client, an access scope and a resource location.
51. The method of claim 50, wherein the establishing of the authorization comprises
generating or updating an access right resource having information about an authorization to access the protected resource based on information included in the authorization request message.
52. The method of claim 51, wherein the determining of whether to authorize the client to access the resource comprises checking an allowed access scope for the client from the access right resource.